AIR 5-173
Gas-Fired Indoor and Outdoor Duct Furnaces
AIR 5-173.4
September, 2006
Indoor and Outdoor Duct Furnaces
Gas-Fired
TECHNICAL MANUAL
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
A complete line of both indoor and outdoor heating and
ventilating equipment is offered. This catalog describes in detail
the gas-fired, gravity vented, power vented, and separated
combustion duct furnace/make-up air units.
furnace with a blower and downturn sections, or a furnace
with a blower, cooling coil, and downturn sections. With these
configurations, the units can satisfy a building’s heating,
make-up air, cooling, or ventilating requirements.
Depending on the requirements of the application, the duct
furnace can be ordered either by itself, a furnace with a blower
section, a furnace with a blower and cooling coil sections, a
This catalog describes the design benefits, construction
features, performance data, unit selection procedure, control
applications, and the optional and accessory devices available.
Refer to the Page 75 (inside back cover)
for Model Nomenclature
Table of Contents
Page
Features and Benefits........................................................................................................................................................ 3
Duct Furnace Design Features.......................................................................................................................................4-7
Duct Furnace Performance Data........................................................................................................................................ 8
Duct Furnace Unit Selection.............................................................................................................................................. 9
Duct Furnace Pressure Drop Curves............................................................................................................................... 10
Duct Furnace Unit Dimensions...................................................................................................................................11-14
System Unit Design Features......................................................................................................................................15-17
System Unit General Performance Data.....................................................................................................................18-19
Model Nomenclature Description................................................................................................................................20-25
Options........................................................................................................................................................................26-28
Thermostats..................................................................................................................................................................... 29
Accessories ..................................................................................................................................................................... 30
Control Applications....................................................................................................................................................31-35
System Unit Selection.................................................................................................................................................36-37
Option & Accessory Pressure Drop Data......................................................................................................................... 38
Blower Performance Data...........................................................................................................................................39-41
Sheave Arrangements...................................................................................................................................................... 42
Electrical Data.................................................................................................................................................................. 43
Motor Data...................................................................................................................................................................44-48
System Unit Dimensions - Indoor Gravity Vented.......................................................................................................49-50
System Unit Dimensions - Indoor Separated Combustion ........................................................................................51-52
System Unit Dimensions - Outdoor.............................................................................................................................53-56
Dimensions - Indoor Unit Base........................................................................................................................................ 57
Dimensions - Outdoor Unit Base .................................................................................................................................... 58
Dimensions - Roof Curbs (Outdoor)................................................................................................................................. 59
Dimensions - Rainhood and Birdscreen (Outdoor).......................................................................................................... 60
Dimensions - Remote Panel............................................................................................................................................. 60
System Unit Weights........................................................................................................................................................ 61
Cooling Cabinet Specifications....................................................................................................................................62-63
DX Cooling Coil Performance Data.............................................................................................................................64-65
Chilled Water Cooling Coil Performance Data............................................................................................................66-67
Cooling Coil Dimensions.................................................................................................................................................. 68
Evaporative Cooler Specifications and Dimensions (Outdoor) ..................................................................................69-70
Specifications..............................................................................................................................................................71-74
Model Nomenclature........................................................................................................................................................ 75
!
WARNING
Do not locate ANY gas-fired unit in areas where chlorinated,
halogenated or acid vapors are present in the atmosphere.
!
WARNING
Do not install in potentially explosive or flammable atmosphere
laden with dust, sawdust, or similar airborne materials.
As Airedale has a continuous product improvement program, it reserves the right to change design and specifications without notice.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Product Features and Benefits
Full Product Line Offering
Feature
Benefit
• All models are 80% thermally efficient
• Saves fuel compared with less efficient equipment
• Blower performance up to 3.0” W.C.
• Applications can include longer ductwork lengths or
accessories with higher pressure drops
• DX or chilled water section with factory installed coil
• One unit can provide both heating and cooling
• Building management system compatible controls
• Allows for energy savings by operating the unit only during
the required time periods
• Safety control devices (Smoke detectors and • Insures the safety of the building occupants
gas safety switches)
• Input ranges from 75,000 to 1,200,000 Btu/Hr
• Flexible units to accommodate a variety of heating requirements
Easy Installation
Feature
Benefit
• Separate line and low voltage terminal strips (premium units)
• Allows for quick and accurate field wiring connections
or low voltage terminal connections (standard units)
• Dead front disconnect switches
• Saves labor time compared to field mounting a box type
disconnect switch
Easy to Service
Feature
Benefit
• Job specific wiring diagrams
• Allows for easy troubleshooting
• Gas manifold positioned to allow for easy burner/pilot access
• Prevents the need to disconnect the gas piping when servicing
the burner
• Design provides simplified heat exchanger removal
• The heat exchanger can be removed without disconnecting the
gas, electrical, or ductwork connections (separated combustion and outdoor units)
• Gas manifold designed for easy orifice inspection
• Simplifies the service inspection process
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Indoor Gravity Vented (IFG)
For Heating, Heating/Cooling and
Make-Up Air Systems
The indoor gravity vented duct furnace was designed for use
with a building’s heating, heating/cooling and make-up air
systems. Available in 11 gravity vented model sizes, the unit
covers a wide variety of applications. They have input ranges
from 75,000 to 400,000 Btu/Hr and can operate on either natural
or propane gas. The airflow direction can be spec­ified when
ordering the unit. The duct furnace is certified for location either
upstream or downstream from cooling coils and has a drain pan
that allows connection to a condensate drain line.
Figure 4.1
Indoor Gravity Vented Duct Furnace (IFG)
Optional Features - Factory Installed
• 409 stainless steel heat exchanger and burner
• 409 stainless steel drip pan
• Single stage standing pilot control system for operation on
propane gas
• Intermittent pilot with continuous retry control system with
single-stage, two-stage, mechanical modulation, and electronic
modulation controls for either natural or propane gas
• Building management compatible gas controls for modulation
control using a 0-10 Vdc or 4-20 mA input
• Multiple furnace electronic amplifier for controlling up to 4
duct furnaces with one discharge air sensor
• Gas control step down transformers for 208/230V/1Ph and
208/230/460/575V/3Ph
• Left side access to burner and gas controls
• Adjustable differential air flow proving system
• Fan delay timer
• High and/or low gas pressure switches
• Manual reset high limit switch
• Timed freeze protection
• Supply air fire stat
• Control relay - double pole, double throw
• Installed thermostat - two-stage
• Separate line voltage and low voltage terminal strips
• Premium control box and gas control string
Accessories - Field Installed
Standard Features:
•
•
•
•
•
•
•
•
•
•
CSA certification for use in the US and Canada
ETL certification
80% thermally efficient
Blocked vent safety switch
20 gauge aluminumized steel cabinet
115V control step down transformer with 24V gas controls
Aluminized steel heat exchanger
Aluminized steel burner with stainless steel separator strip
Certified to 3.0” W.C. external static pressure
Single stage standing pilot control system for operation on
natural gas
• Right side access to burner and gas controls (when looking
into the discharge) with slide-out burner drawer
• High limit safety control
• Control terminal board
• Power exhauster with vent adapter
• Electronic programmable heat/cool room thermostats—for
single and two stage units
• Smoke detector
• 7-day digital and 7-day econo time clocks
• Single-stage room thermostats
• Two stage room and duct thermostats
• Electronic two stage duct thermostats
• Electronic modulating room and duct thermostats and a room
override for the duct thermostat
• Summer/winter switch
• Condensate connection drain kits
• Pipe hanger adapter kits
• 5-10 PSI gas pressure regulator
• Room thermostat guards
Special Applications
A 409 stainless steel heat exchanger and burner is
recommended when the unit is installed downstream of a
cooling coil or evaporative cooler, and when the combined
entering/return air to the unit is below 40°F.
Variable Air Movement Applications
When the air mover supplied by others can provide variable
air movement (i.e. 2-speed or variable frequency drive units),
the certified allowable minimum CFM of the gravity vented duct
furnace can be 66% of the minimum listed CFM in Table 8.2 if
the unit is applied as follows:
1. The unit is provided with two-stage, mechanical modulation,
or electronic modulation gas controls.
2. The unit is provided with a factory installed discharge air
controller.
3. The system does not include a room thermostat.
The factory installed discharge air thermostat will prevent the unit
from firing above the allowable 100°F rise when the unit is at or
above the minimum CFM by monitoring the discharge air and
going to low fire. A room thermostat cannot be used, because it is
located remote from the unit, and could cause the unit to over-fire.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Indoor Separated Combustion (IFS)
For Heating, Heating/Cooling and
Make-Up Air Systems
The indoor separated combustion duct furnace was designed for
use with a building’s heating, heating/cooling and make-up air
systems. Separated combustion duct furnaces are specifically
designed for buildings with hostile atmospheric conditions,
such as high humidity, or negative pressures. Available in 11
power exhausted model sizes, the unit covers a wide variety of
applications. They have input ranges from 75,000 to 400,000
Btu/Hr and can operate on either natural or propane gas.
The airflow direction can be spec­ified when ordering the unit.
The duct furnace is certified for location either upstream or
downstream from cooling coils and has a drain pan that allows
connection to a condensate drain line.
Figure 5.1
Indoor Separated Combustion Duct Furnace (IFS)
Optional Features - Factory Installed
• 409 stainless steel heat exchanger and burner
• 409 stainless steel drip pan
• Single stage intermittent pilot with continuous retry control
system for operation on propane gas
• Two-stage, mechanical modulation, and electronic modulation
controls for either natural or propane gas
• Building management compatible gas controls for modulation
control using a 0-10 Vdc or 4-20 mA input
• Multiple furnace electronic amplifier for controlling up to 4
duct furnaces with one discharge air sensor
• Gas control step down transformers for 208/230V/1Ph and
208/230/460/575V/3Ph
• Left side access to burner and gas controls
• Adjustable differential air flow proving system
• Fan delay timer
• High and/or low gas pressure switches
• Manual reset high limit switch
• Timed freeze protection
• Supply air fire stat
• Control relay - double pole, double throw
• Installed thermostats - two-stage and electronic modulation
Accessories - Field Installed
• Concentric vent kits—horizontal and vertical (see page 6)
• Power exhauster step down transformers for 460V and 575V
• Electronic programmable heat/cool room thermostats—for
single and two stage units
• Smoke detector
• 7-day digital and 7-day econo time clocks
• Single-stage room thermostats
• Two stage room and duct thermostats
• Electronic two stage duct thermostats
• Electronic modulating room and duct thermostats and a room
override for the duct thermostat
• Summer/winter switch
• Condensate connection drain kits
• Pipe hanger adapter kits
• 5-10 PSI gas pressure regulator
• Room thermostat guards
Standard Features:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
CSA certification for use in the US and Canada
ETL certification
80% thermally efficient
Power exhauster motor
Separate electrical, venting, and gas control access with fully
gasketed doors
20 gauge aluminized steel cabinet
115V control step down transformer with 24V gas controls
Aluminized steel heat exchanger
Aluminized steel burner with stainless steel separator strip
Certified to 3.0” W.C. external static pressure
Single stage intermittent pilot with continuous retry control
system for operation on natural gas
Differential pressure switch for proof of combustion air
Power exhauster relay for pre-purge and post-purge
Separate line voltage and low voltage terminal strips
Right side access to burner and gas controls (when looking
into the discharge) with slide-out burner drawer
Side or bottom gas connection access
High limit safety control
Special Applications
A 409 stainless steel heat exchanger and burner is
recommended when the unit is installed downstream of a
cooling coil or evaporative cooler, and when the combined
entering/return air to the unit is below 40°F.
Variable Air Movement Applications
When the air mover supplied by others can provide variable air
movement (i.e. 2-speed or variable frequency drive units), the
certified allowable minimum CFM of the separated combustion
duct furnace can be 66% of the minimum listed CFM in Table
8.2 if the unit is applied as follows:
1. The unit is provided with two-stage, mechanical modulation,
or electronic modulation gas controls.
2. The unit is provided with a factory installed discharge air
controller.
3. The system does not include a room thermostat.
The factory installed discharge air thermostat will prevent the unit
from firing above the allowable 100°F rise when the unit is at or
above the minimum CFM by monitoring the discharge air and
going to low fire. A room thermostat cannot be used, because it is
located remote from the unit, and could cause the unit to over-fire.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Separated combustions indoor duct furnaces can be supplied with one of the following vent termination methods:
• Horizontal Concentric Venting — Figure 6.1
• Vertical Concentric Venting — Figure 6.2
• Separate Vent pipes — Includes 2 vent caps (not shown)
The vent termination method must be supplied with the unit
and specified at the time of ordering.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Outdoor Gravity & Power Exhausted (OFG/OFP)
For Heating, Heating/Cooling and
Make-Up Air Systems
The outdoor duct furnace was designed for use with a building’s
heating, heating/cooling and make-up air systems. Available
in 11 gravity vented or power exhausted model sizes, the unit
covers a wide variety of applications. They have input ranges
from 75,000 to 400,000 Btu/Hr and can operate on either
natural or propane gas. The airflow direction can be specified
when ordering the unit. The duct furnace is certified for location
either upstream or downstream from cooling coils and has
holes to drain any condensate that may form onto the roof.
Figure 7.1
Outdoor Duct Furnace (OFG)
Optional Features - Factory Installed
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Power exhaust
409 stainless steel heat exchanger and burner
409 stainless steel drip pan
Single stage intermittent pilot with lockout control system for
operation on propane gas
Two-stage, mechanical modulation, and electronic
modulation controls for either natural or propane gas
Building management compatible gas controls for modulation
control using a 0-10 Vdc or 4-20 mA input
Multiple furnace electronic amplifier for controlling up to 4
duct furnaces with one discharge air sensor
Control step down transformers for 208/230V/1Ph and
208/230/460/575V/3Ph
Left side access to burner and gas controls
Adjustable differential air flow proving system
Fan delay timer
High and/or low gas pressure switches
Manual reset high limit switch
Timed freeze protection
Supply air fire stat
Control relay - double pole, double throw
Installed thermostats - two-stage and electronic modulation
Accessories - Field Installed
• Electronic programmable heat/cool room thermostats for single and two stage units
• Smoke detector
• 7-day digital and 7-day econo time clocks
• Single-stage room thermostats
• Two stage room and duct thermostats
• Electronic two stage duct thermostats
• Electronic modulating room and duct thermostats
• Room override for the duct thermostat
• 4 foot exhaust vent extension
• Summer/winter switch
• 5-10 PSI gas pressure regulator
• Room thermostat guards
Standard Features:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
C.S.A. certification for use in the US and Canada
ETL certification
All units a minimum of 80% thermally efficient
18 gauge aluminized steel cabinet with a baked-on polyester
powder paint finish on exterior casing parts
Single 115V control step down transformer with 24V gas
control circuit
Aluminized steel heat exchanger
Aluminized steel burner with stainless steel separator strip
Certified to 3.0” W.C. external static pressure
Combination combustion air/exhaust vent cap
Single stage intermittent pilot with continuous retry control system for operation on natural gas.
Separate line voltage and low voltage terminal strips
Right side (when looking into the discharge) access to
burner and gas controls with slide-out burner drawer
Side or bottom gas connection access
High limit safety control
Rail type mounting base for slab installation
Special Applications
A 409 stainless steel heat exchanger and burner is
recommended when the unit is installed downstream of a
cooling coil or evaporative cooler, and when the combined
entering/return air to the unit is below 40°F.
Variable Air Movement Applications
When the air mover supplied by others can provide variable air
movement (i.e. 2-speed or variable frequency drive units), the
certified allowable minimum CFM of the outdoor duct furnace
can be 66% of the minimum listed CFM in Table 8.2 if the unit
is applied as follows:
1. The unit is provided with two-stage, mechanical modulation,
or electronic modulation gas controls.
2. The unit is provided with a factory installed discharge air
controller.
3. The system does not include a room thermostat.
The factory installed discharge air thermostat will prevent the unit
from firing above the allowable 100°F rise when the unit is at or
above the minimum CFM by monitoring the discharge air and
going to low fire. A room thermostat cannot be used, because it is
located remote from the unit, and could cause the unit to over-fire.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 8.1 — Air Temperature Rise - Low Temperature Rise Separated Combustion/Outdoor Duct Furnaces ➀ ➁ ➂
Air Temperature Rise Through Unit (°F)
Model Btu/Hr202530354045505560
Size
Input
Output
Max Min
CFM
75
100
125
150
175
200
300
350
225
250
400
75,000
100,000
125,000
150,000
175,000
200,000
225,000
250,000
300,000
350,000
400,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
200,000
240,000
280,000
320,000
2778
3704
4630
5556
6481
7407
8333
9259
11111
12963
14815
2222
2963
3704
4444
5185
5926
6667
7407
8889
10370
11852
1852
2469
3086
3704
4321
4938
5556
6173
7407
8642
9877
1587
2116
2646
3175
3704
4233
4762
5291
6349
7407
8466
1389
1852
2315
2778
3241
3704
4167
4630
5556
6481
7407
1235
1646
2058
2469
2881
3292
3704
4115
4938
5761
6584
1111
1481
1852
2222
2593
2963
3333
3704
4444
5185
5926
1010
1347
1684
2020
2357
2694
3030
3367
4040
4714
5387
926
1235
1543
1852
2160
2469
2778
3086
3704
4321
4938
Table 8.2 — Air Temperature Rise - High Temperature Rise Separated Combustion/Outdoor Duct Furnaces and All
Gravity Vented Indoor Duct Furnaces ➀ ➁ ➂
Air Temperature Rise Through Unit (°F)
90
95100 ➄
Model Btu/Hr20 ➃40 ➃50 ➃606570758085
Input Output Max Min
Size
CFM
75
75,000 60,000 2778
1389
1111
926
855
794
741
694
654
617
585
556
100
100,000 80,000 3704
1852
1481
1235
1140
1058
988
926
871
823
780
741
125
125,000 100,000 4630
2315
1852
1543
1425
1323
1235
1157
1089
1029
975
926
150
150,000 120,000 5556
2778
2222
1852
1709
1587
1481
1389
1307
1235
1170
1111
175
175,000 140,000 6481
3241
2593
2160
1994
1852
1728
1620
1525
1440
1365
1296
200
200,000 160,000 7407
3704
2963
2469
2279
2116
1975
1852
1743
1646
1559
1481
225
225,000 180,000
8333
4167
3333
2778
2564
2381
2222
2083
1961
1852
1754
1667
250
250,000 200,000
9259
4630
3704
3086
2849
2646
2469
2315
2179
2058
1949
1852
300
300,000 240,000 11111➅
5556
4444
3704
3419
3175
2963
2778
2614
2469
2339
2222
350
350,000 280,000 11111➆
6481
5185
4321
3989
3704
3457
3241
3050
2881
2729
2593
400
400,000 320,000 11111➆
7407
5926
4938
4558
4233
3951
3704
3486
3292
3119
2963
➀
Ratings are shown for elevations up to 2000 feet. For higher elevations, the input rating should be reduced at the rate of 4% per 1000 feet elevation above sea level. For Canada,
in elevations between 2000 and 4500 feet, the unit must be derated to 90% of the rating listed above.
Units approved for use in California by CEC.
High air temperature rise separated combustion/outdoor units include an air distribution baffle and restrictor change when compared to the low air temperature rise separated
combustion/outdoor units. Field conversion of a high air temperature rise to a low air temperature rise unit (or the opposite) requires a factory supplied conversion kit.
For separated combustion/outdoor units, the certified range of the High Temperature Rise Duct Furnaces is 20°-100°F but it is recommended that they be used from 60°-100°F
to reduce the system pressure drop. All gravity vented indoor duct furnaces are supplied with a factory installed air baffle. For applications where an air temperature rise less than
60°F is desired, it is recommended to remove this baffle to reduce system pressure drop.
For Variable Air Movement Applications, see page 4, 5 or 7.
For High Temp Rise Separated Combustion and Outdoor Furnaces the max CFM is 9578 due to the maximum 3” W.C. static pressure on the heat exchanger. See Figure 10.2.
The maximum CFM for the 350 and 400 results in a 23°F and a 27°F air temperature rise (respectively) based on the maximum unit pressure drop.
➁
➂
➃
➄
➅
➆
Air Temperature and External Static Pressure Limits
The maximum allowable discharge air temperature is 150°F. The maximum allowable air temperature rise for Low Air Temperature
Rise Separated Combustion/Outdoor Units is 60°F. The maximum allowable air temperature rise for High Air Temperature Rise
Separated Combustion/Outdoor and all Gravity Vented Units is 100°F. All duct furnaces are designed for a maximum allowable static
pressure of 3.0" W.C. on the heat exchanger.
Figure 8.1 - Recommended Unit Configurations
SINGLE TOP VIEW
2279 CFM
60°F ENTERING
AIR TEMP.
TANDEM TOP VIEW
2279 CFM
20°F ENTERING
AIR TEMP.
160,000
BTU/HR
OUTPUT
65°F
TEMP. RISE
160,000
BTU/HR
OUTPUT
65°F
TEMP. RISE
160,000
BTU/HR
OUTPUT
65°F
TEMP. RISE
PREHEAT
UNIT
REHEAT
UNIT
PARALLEL TOP VIEW
125°F DISCHARGE
AIR TEMP.
5698 CFM
20°F ENTERING
AIR TEMP.
150°F DISCHARGE
AIR TEMP.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
200,000
BTU/HR
OUTPUT 65°F
TEMP. RISE
SEE SERVICE
CLEARANCES
200,000
BTU/HR
OUTPUT 65°F
TEMP. RISE
85°F DISCHARGE
AIR TEMP.
Gas-Fired Indoor and Outdoor Duct Furnaces
Selecting Model and Determining Duct
Furnace Pressure Drop
!
Caution
Do not provide less than the minimum CFM throughput
shown in Tables 8.1 and 8.2 unless the unit meets Variable
Air Movement Applications conditions.
Selecting Model
To select the proper outdoor duct furnace, two of the following
three pieces of information must be given.
Either:
1. The required Btu/Hr output.
2. The required CFM.
3. The required ∆T (°F)
The formula in step 3B will calculate the third item.
Then use the following procedure:
1. Determine the required Btu/Hr output.
2. Determine the Btu/Hr input required based on the outputs
shown in Tables 8.1 and 8.2.
3. Determine the required air temperature rise through the duct
furnace. The temperature rise is determined by either of the
following methods:
A. Using Table 8.1 and 8.2 - Air Temperature Rise
find the model number of the unit with the required
output Btu/Hr. Follow the row until the air volume (CFM)
is found. Then proceed up the column to locate the
corresponding temperature rise.
B. Using the algebraic formula:
Btu/Hr output
∆T (°F) =
CFM x 1.08
4. Determine the unit air temperature rise style. Based on
the required air temperature rise, determine if a high
temperature rise or a low temperature rise unit is needed.
Low temperature rise units can only be used if the required
CFM is between 20°-60°F. High temperature rise units are
used when the temperature rise is between 60°-100°F.
For Variable Air Movement Applications:
The selection of the unit should be based on the low speed
temperature rise of the unit. Thus, if the high speed air
temperature rise is 40°F and the low speed air temperature
rise is 80°F, a high air temperature rise unit should be
selected.
Selection Example
Model and Duct Furnace Pressure Drop Selection
Given:
1. Btu/Hr output = 240,000 Btu/Hr
2. Temperature Rise = 65°F
Selection:
1. The required Btu/Hr output = 240,000 Btu/hr.
2. From either Table 8.1 and 8.2, the OFG300 has an
Input = 300, 000 Btu/hr
Output = 240,000 Btu/Hr
3. The required temperature rise is 65°F. Using Table 8.2
for a 65°F air temperature rise, the CFM can be found to
be 3419. Also, the CFM can be calculated by using the
equation:
Btu/Hr output
240,000
CFM = —————— or
———— = 3419
∆T (°F) x 1.08
65 x 1.08
4. Since the 65°F air temperature rise is between 60°-100°F,
the unit would be a high air temperature rise unit.
5. To determine the pressure drop, use Figure 10.2 for high
temperature rise units.
6. Enter the bottom of the table at 3419 CFM until it intersects
the OFG300 curve. Then move horizontally across to the left
and read the pressure drop of 0.26" W.C.
Determining Duct Furnace Pressure Drop
To determine the duct furnace pressure drop, use the following
procedure:
5. Based on the style (high or low air temperature rise) of
unit, determine which pressure drop curve should be used.
Figure 10.1 for Low Air Temperature Rise units and Figure
10.2 for High Air Temperature Rise units.
6. Enter either figure at the required CFM and follow up the
curves until the CFM intersects with the curve for the duct
furnace Btu/Hr input that was selected. Move horizontally
across to the left and read the pressure drop.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 10.1
Low Air Temperature Rise Separated Combustion/Outdoor Duct Furnace and
Gravity Vented Indoor Duct Furnace Without Baffle Pressure Drop vs CFM curves
1.4
250/300
1.2
Caution:
Do not exceed the CFM ranges
indicated in Table 8.1
1
PRESSURE DROP
( P " W.C.)
350/400
0.8
200/225
150/175
0.6
100/125
0.4
75
0.2
0
0
1000
2000
3000
4000
5000
6000
7000
8000
9000 10000 11000 12000 13000 14000 15000
CFM
Figure 10.2
High Air Temperature Rise Separated Combustion/Outdoor Duct Furnace and
Gravity Vented Indoor Duct Furnace With Baffle Pressure Drop vs CFM curves
page 9,
example
step 6
10
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 11.1
Indoor Gravity Vented Duct Furnace Dimensions (IFG)
22.90
2.25
H (PREMIUM/MODULATING CONT.)
H (STANDARD)
18.39 (MOUNTING HOLES)
A
3.16
F (MOUNTING HOLES)
G
45
2.00
J (DIA. ROUND)
PREMIUM
CONTROL
BOX
7.33
E
(DUCT SIZE)
B
N
.55
10.26
M
5.13
8.97
L
O
k
I
D (DUCT SIZE)
C
Table 11.1
Indoor Gravity Vented Duct Furnace Dimensions (IFG)
(All dimensions in inches)
Model Size
Dimensions75100/125150/175200/225250/300350/400
A
15.41
17.90
22.16
24.29
27.33
38.83
B
37.80
37.80
37.80
41.80
41.80
41.80
C
22.43
22.43
22.43
24.09
24.09
24.09
D
15.21
17.70
21.96
24.09
27.13
38.63
E
19.07
19.07
19.07
23.07
23.07
23.07
F
14.09
16.59
20.85
22.98
26.01
37.51
G
12.65
15.14
19.41
21.60
24.60
36.14
H (standard)
18.98
21.47
25.73
28.06
31.40
42.40
H (premium/modulating cont.)
21.48
23.97
28.24
30.30
33.31
44.84
I
17.83
17.83
17.83
20.68
20.68
20.68
J
5
6
7
7
8/10
10
K
14.55
17.04
21.31
23.26
26.44
37.80
L (min. approx.)
5.0
5.0
5.0
6.6/6.1
6.1
6.1/5.8
M
2.01
2.01
2.01
1.94
1.94
1.94
N
29.65
29.65
29.65
33.65
33.65
33.65
O (max. approx.)
5.6
5.6
5.6
6.8/6.2
6.2
8.3/8.6
Gas Connection Pipe Size (max. std.)
1/2
1/2
1/2
1/2 / 3/4
3/4
3/4
Gas Connection Pipe Size (max. prem.)
3/4
3/4
3/4
3/4
3/4
3/4
Approx.
Unit Shipping
89#
113#
140#
175#
213#
284#
Weight
Unit Net
73#
95#
121#
155#
181#
251#
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
11
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 12.1
Indoor Separated Combustion Duct Furnace Dimensions (IFS)
35.40
33.40
26.63 MOUNTING HOLES
20.00
13.32
MOUNTING
HOLE
Øk
EXHAUST
ØL
COMBUSTION
AIR INLET
1.06"
SIDE GAS
CONNECTION
kNOCkOUT
8.66
10.26
ELECTRICAL J
CONNECTIONS
(both sides)
H
D
E
1.93
G
9.06
6.38
8.26
1.00
4.24
7.30
M
0.72
2.00
F
1.06"
BOTTOM GAS
CONNECTION
kNOCkOUT
A
B - MOUNTING HOLES
C
1.06" BOTTOM
GAS CONNECTION
kNOCkOUT
REAR VIEW
SIDE VIEW
Table 12.1
Indoor Separated Combustion Duct Furnace Dimensions (IFS)
(All dimensions in inches)
Model Size
Dimension75100/125150/175200/225250/300350/400
A
B
C
D
E
F
G
H (duct width)
J (duct height)
K ➀
L ➀
M
Gas Connection Pipe Size
Approx.
Unit Shipping
Weight
Unit Net
23.74
13.98
12.58
33.04
28.61
23.08
18.19
15.12
18.90
3.86
4.17
10.26
1/2"
226
151
26.24
16.48
15.08
33.04
28.61
23.08
18.19
17.62
18.90
3.86
4.17
10.26
1/2"
250
170
30.50
20.74
19.34
33.04
28.61
23.08
18.19
21.88
18.90
3.86
4.17
10.26
1/2"
273
188
32.60
22.85
21.45
37.04
32.61
26.43
19.21
23.99
22.90
5.86
6.18
9.60
1/2"
325
230
35.60
25.85
24.48
37.04
32.61
26.43
19.21
26.99
22.90
5.86
6.18
9.60
3/4"
385
275
➀ Nominal vent pipe size is 4" (Models 75-175) and 6" (Models 200-400). Exhaust pipe installed over collar. Combustion air pipe installed inside collar.
12
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
47.14
37.39
36.00
37.04
32.61
26.43
19.21
38.53
22.90
5.86
6.18
9.60
3/4"
454
329
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 13.1 - Outdoor Gravity Vented Duct Furnace Dimensions (OFG)
b
33.50
A
a
e
8.40
f
1.06"
side gas
connection
knockout
24.90
1.06"
bottom gas
connection
knockout
4.70
22.47
13.00
10.26
37.44
4.29
d
electrical c
connections
(both sides)
6.28
9.00
G
1.06" bottom
gas connection
knockout
3.00
side view
Figure 13.2
Rail or Slab Type Mounting Base
rear view
B
2.35
Lifting hole
0.75 dia.
2.00 1.00
G
5.42
1.75
37.44
23.10
spreader
bar
gas
control
access
side
1.50
Lifting
hole
1.00 dia.
1.80
spreader
bar
1.75
Table 13.1
Outdoor Gravity Vented Duct Furnace Dimensions (OFG) (All dimensions in inches)
3.00
Model Size75100/125150/175200/225250/300350/400
A
B
C (duct height)
D (duct width) E
F
G
Gas Connection Pipe Size
Unit Shipping
Approx.
Unit Net
Weight
Cap Net
19.22
31.96
18.98
15.18
14.20
36.11
25.50
1/2"
282#
207#
16#
19.22
34.46
18.98
17.69
14.20
36.11
28.00
1/2"
305#
225#
16#
19.22
38.72
18.98
21.94
14.20
36.11
32.25
1/2"
333#
248#
16#
19.22
40.84
22.98
24.06
14.20
40.11
34.38
1/2"
383#
288#
16#
21.31
43.86
22.98
27.09
15.18
40.11
37.40
3/4"
428#
318#
26#
24.64
55.38
22.98
38.60
18.38
40.11
48.92
3/4"
525#
400#
35#
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
13
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 14.1 - Outdoor Power Exhausted Duct Furnace Dimensions (OFP)
B
33.50
POWER EXHAUSTER
DISCHARGE COVER
Q
9.50
2.67
COMBUSTION AIR
INLET LOUVERS
1.06"
SIDE GAS
CONNECTION
kNOCkOUT
R
3.00
1.72
10.26
8.40
4.16
F
24.90
4.70
22.47
1.06
BOTTOM GAS
CONNECTION
kNOCkOUT
13.00
D
ELECTRICAL
C
CONNECTIONS
(both sides)
6.28
9.00
3.00
G
1.06"BOTTOM
GAS CONNECTION
kNOCkOUT
37.44
4.29
REAR VIEW
SIDE VIEW
Figure 14.2
Rail or Slab Type Mounting Base
B
G
2.35
2.00 1.00
Lifting hole
0.75 dia.
5.42
1.75
37.44
23.10
spreader
bar
1.50
Lifting
hole
1.00 dia.
1.80
spreader
bar
1.75
Table 14.1
Outdoor Power Vented Duct Furnace Dimensions (OFP) (All dimensions in inches)
3.00
Model Size75100/125150/175200/225250/300350/400
B
C (duct height)
D (duct width)
F
G
Q
R
Gas Connection Pipe Size
Unit Shipping
Approx.
Weight
Unit Net
14
31.96
18.98
15.18
36.11
25.50
10.95
7
1/2"
292#
217#
34.46
18.98
17.69
36.11
28.00
10.95
7
1/2"
315#
235#
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
38.72
18.98
21.94
36.11
32.25
10.95
7
1/2"
343#
258#
40.84
22.98
24.06
40.11
34.38
11.58
9.9
1/2"
398#
303#
43.86
22.98
27.09
40.11
37.40
11.58
9.9
3/4"
443#
333#
55.38
22.98
38.60
40.11
48.92
11.58
9.9
3/4"
540#
415#
Gas-Fired Indoor and Outdoor Duct Furnaces
Indoor Gravity Vented
For Heating, Heating/Ventilating/Cooling and
Make-Up Air Systems
Figure 15.2
Indoor Gravity Vented Multiple Duct Furnace
with Blower Section (IBG)
The indoor gravity vented duct furnace with blower, and/or
cooling sections was designed for use with a building’s heating,
heating/ventilating/cooling and make-up air systems. They have
input ranges from 75,000 to 1,200,000 Btu/Hr and can operate
on either natural or propane gas. The airflow ranges from
556 to 14,500 CFM and the airflow direction can be specified
when ordering the unit. The unit can be provided with a cooling
coil section with either a factory installed DX or chilled water
cooling coil or the coil can be provided by others.
Figure 15.1
Indoor Gravity Vented Duct Furnace
with Blower Section (IBG)
Standard Features:
• All standard duct furnace features (see page 4)
• ETL certification of the entire system unit
• 18 gauge aluminized steel blower cabinet with a baked-on
polyester powder paint finish on blower and cooling cabinet
exterior casing parts
• 115V step down transformer with 24V gas controls
• Aluminized steel heat exchanger and burner
• Blower performance up to 3.0" W.C. external static pressure
• Single stage standing pilot control system for operation on
natural gas
• Separate line voltage and low voltage terminal strips
• Right side access to burner and gas controls (when looking
into the discharge) with slide-out burner drawer
• Side gas and electrical connection access
• Fan timer and high limit safety control
• Combination suspension and slab type mounting
• Adjustable belt drive
• Premium control box
Optional Features - Factory Installed
• All optional duct furnace features (see page 4)
• DX or chilled water section with optional factory installed
cooling coil (see page 62 for performance and CFM ranges)
• 409 stainless steel heat exchanger and burner
• Open drip proof, totally-enclosed, high efficiency, and two
speed motors
• Motor starters and contactors with one normally open
contact
• Variable frequency drive
• 1" or 2" permanent, 2" disposable, and 2" FARR® 30/30
filters
• 1" Insulation for the blower and/or cooling cabinet sections
• Double wall construction for blower, and/or cooling cabinet
sections
• Dead-front disconnect switches
• Two position, modulating, building pressure sensing, three
position, building management (0-10 Vdc or 4-20 mA)
damper actuators
• Economizer warm-up packages
• Step-down transformers for 460/575V/3Ph
• Left side access to blower, burner, and gas controls
• Mild temperature thermostat
• Supply and return air firestats
• Blower door interlock switch
• Convenience outlet
• Blower and motor vibration isolation
• Pillow block bearings
• Extended grease lines
• Burner/blower/damper service switches
• 6, 10, or 14 point circuit analyzer
Accessories - Field Installed
•
•
•
•
•
•
•
•
•
All accessory duct furnace features (see page 4)
Remote control panels
Building pressure sensing damper controls
Smoke detector
7-day digital and 7-day econo time clocks
Single-stage room thermostats
Two-stage room and duct thermostats
Electronic two stage duct thermostats
Electronic modulating room and duct thermostats and a
room override for the duct thermostat
• Electronic temperature control allowing for two, three, four
or six stage control
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
15
Gas-Fired Indoor and Outdoor Duct Furnaces
Indoor Separated Combustion
For Heating, Heating/Ventilating/Cooling and
Make-Up Air Systems
Figure 16.2
Indoor Separated Combustion Multiple Duct Furnace
with Blower Section (IBS)
The indoor separated combustion duct furnace with blower,
and/or cooling sections was designed for use with a building’s
heating, heating/ventilating/cooling and make-up air systems.
Separated combustion duct furnaces are specifically designed
for buildings with hostile atmospheric conditions, such as high
humidity or negative pressures. They have input ranges from
75,000 to 1,200,000 Btu/Hr and can operate on either natural
or propane gas. The airflow ranges from 556 to 14,500 CFM
and the airflow direction can be specified when ordering the
unit. The unit can be provided with a cooling coil section with
either a factory installed DX or chilled water cooling coil or the
coil can be provided by others.
Figure 16.1
Indoor Separated Combustion Duct Furnace
with Blower Section (IBS)
Standard Features:
• All standard duct furnace features (see page 5)
• ETL certification of the entire system unit
• 18 gauge aluminized steel blower cabinet with a baked-on
polyester powder paint finish on blower and cooling cabinet
exterior casing parts
• 115V step down transformer with 24V gas controls
• Aluminized steel heat exchanger and burner
• Blower performance up to 3.0" W.C. external static pressure
• Single stage intermittent pilot with continuous retry control
system for operation on natural gas
• Separate line voltage and low voltage terminal strips
• Right side access to burner and gas controls (when looking
into the discharge) with slide-out burner drawer
• Side or bottom gas and electrical connection access
• Fan timer and high limit safety control
• Combination suspension and slab type mounting
• Adjustable belt drive
16
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Optional Features - Factory Installed
• All optional duct furnace features (see page 5)
• DX or chilled water section with optional factory installed
cooling coil (see page 62 for performance and CFM ranges)
• 409 stainless steel heat exchanger and burner
• Open drip proof, totally-enclosed, high efficiency, and two
speed motors
• Motor starters and contactors with one normally open
contact
• Variable frequency drive
• 1" or 2" permanent, 2" disposable, and 2" FARR® 30/30
filters
• 1" Insulation for the blower and/or cooling cabinet sections
• Double wall construction for blower, and/or cooling cabinet
sections
• Dead-front disconnect switches
• Two position, modulating, building pressure sensing, three
position, building management (0-10 Vdc or 4-20 mA)
damper actuators
• Economizer warm-up packages
• Step-down transformers for 460/575V/3Ph
• Left side access to blower, burner, and gas controls
• Mild temperature thermostat
• Supply and return air firestats
• Blower door interlock switch
• Convenience outlet
• Blower and motor vibration isolation
• Pillow block bearings
• Extended grease lines
• Burner/blower/damper service switches
• 6, 10, or 14 point circuit analyzer
• Electronic temperature control allows for two, three, four
or six stage control
Accessories - Field Installed
•
•
•
•
•
•
•
•
•
•
•
All accessory duct furnace features (see page 5)
Concentric vent kits — horizontal and vertical (see page 6)
Remote control panels
Building pressure sensing damper controls
Smoke detector
7-day digital and 7-day econo time clocks
Single-stage room thermostats
Two-stage room and duct thermostats
Electronic two stage duct thermostats
Electronic temperature control allows for two, three, four
or six stage control
Electronic modulating room and duct thermostats and a
room override for the duct thermostat
Gas-Fired Indoor and Outdoor Duct Furnaces
Outdoor Gravity Vented & Power Exhausted
For Heating, Heating/Ventilating/Cooling and
Make-Up Air Systems
Figure 17.2
Outdoor Multiple Duct Furnace with Blower
and Downturn Plenum Sections (ODG)
The outdoor duct furnace with blower, cooling, and/or downturn
plenum sections was designed for use with a building’s heating,
heating/ventilating/cooling and make-up air systems. They have
input ranges from 75,000 to 1,200,000 Btu/Hr and can operate
on either natural or propane gas. The airflow ranges from
556 to 14,500 CFM and the airflow direction can be specified
when ordering the unit. The unit can be provided with a cooling
coil section with either a factory installed DX or chilled water
cooling coil or the coil can be provided by others.
Figure 17.1
Outdoor Duct Furnace with Blower, Cooling Cabinet,
and Downturn Plenum Sections (OPG)
Standard Features:
• All standard duct furnace features (see page 7)
• ETL certification of the entire system unit
• 18 gauge insulated aluminized steel cabinet with a baked-on
polyester powder paint finish on exterior casing parts
• 1" insulation for blower, cooling cabinet, and downturn
plenum sections
• Single 115V control step down transformer with 24V gas
control circuit
• Aluminized steel heat exchanger and burner
• Blower performance up to 3.0” W.C. external static pressure
• Single stage intermittent pilot with continuous retry control
system for operation on natural gas
• Separate line voltage and low voltage terminal strips
• Right side (when looking into the discharge) access to
burner and gas controls with slide-out burner drawer
• Side or bottom (through a roof curb) gas and electrical
connection access
• Fan timer and high limit safety control
• Combination curb and slab type mounting base
• Adjustable belt drive
Optional Features - Factory Installed
• All optional duct furnace features (see page 7)
• Downturn plenum section
• DX or chilled water section with optional factory installed
cooling coil (see page 62 for performance and CFM ranges)
• 409 stainless steel heat exchanger and burner
• Open drip proof, totally-enclosed, high efficiency, and two
speed motors
• Low voltage motor starters and contactors with one normally
open contact
• Variable frequency drive
• 1" or 2" permanent, 2" disposable, and 2" FARR® 30/30
filters
• Double wall construction for blower, cooling cabinet, and/or
downturn plenum sections
• Dead-front disconnect switches
• Two position, modulating, building pressure sensing, three
position, building management (0-10 Vdc or 4-20 mA)
damper actuators
• Economizer warm-up packages
• Discharge air dampers (Downturn plenum units only)
• Step-down transformers for 460/575V/3Ph
• Left side access to blower, burner, and gas controls
• Mild temperature thermostat
• Supply and return air firestats
• Blower door interlock switch
• Convenience outlet
• Evaporative cooling section
• Blower and motor vibration isolation
• Pillow block bearings
• Extended grease lines
• Burner/blower/damper service switches
• 6, 10, or 14 point circuit analyzer
• Electronic temperature control allows for two, three, four
or six stage control
Accessories - Field Installed
•
•
•
•
•
•
•
•
•
•
•
•
•
•
All accessory duct furnace features (see page 7)
Remote control panels
Building pressure sensing damper controls
Evaporative cooler fill and drain kits
Insulated roof curbs
Roof curb discharge and return air connection kits
Smoke detector
7-day digital and 7-day econo time clocks
Single-stage room thermostats
Two-stage room and duct thermostats
Electronic two stage duct thermostats
Electronic modulating room and duct thermostats
Electronic temperature control allows for two, three, four
or six stage control
Room override for the duct thermostat
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
17
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 18.1
General Performance Data - Models With Blower
Model Size (Digits 4-6)75100125150175
Btu/Hr Input ➀
75,000 75,000
100,000 100,000 125,000 125,000
150,000150,000
175,000 175,000
Btu/Hr Output ➀
60,000 60,000
80,000 80,000
100,000 100,000
120,000120,000
140,000 140,000
Blower Style (Digit 16 Letter)
A or B C or D
C or D E or F
C or D E or F
C or D E or F
C or D E or F
Max. Temp. Rise (°F)
Min. Temp. Rise (°F)
100
100
28
20
100
85
100
100
27
20
100
100
33
20
100
100
39
23
21
20
Max. CFM ➁
1980 2778
3450
3704
3450 4630
3350 5556
3350 5556
Min. CFM ➁ ➂
556
741
875
926
1111 1111
1296 1296
556
926
Model Size (Digits 4-6)200225250
Btu/Hr Input ➀
200,000 200,000
200,000 225,000 225,000 225,000
250,000250,000
250,000
Btu/Hr Output ➀
160,000 160,000
160,000 180,000 180,000 180,000
200,000200,000
200,000
E or F G or H
I, J, or K
Blower Style (Digit 16 Letter)
C or D E or F
G or H C or D
E or F G or H
Max. Temp. Rise (°F)
100
85
85
100
95
95
100
100
96
Min. Temp. Rise (°F)
44
28
23
49
32
26
31
26
20
Max. CFM ➁
3400 5250
6500
3400
5250 6500
6000 7250
9259
Min. CFM ➁ ➂
1481 1750
1750
1667
1750 1750
1852 1852
1925
Model Size (Digits 4-6)300350400
Btu/Hr Input ➀
300,000 300,000
300,000 350,000 350,000 350,000
400,000400,000
400,000
Btu/Hr Output ➀
240,000 240,000
240,000 280,000 280,000 280,000
320,000320,000
320,000
E or F G or H
I, J, or K
Blower Style (Digit 16 Letter)
Max. Temp. Rise (°F)
Min. Temp. Rise (°F)
E or F G or H
100
100
37
31
I, J, or K E or F
100
20
100
45
G or HI, J, or K
100
100
37
22
100
100
52
42
100
25
Max. CFM ➁
6000 7250
11111
5700
7000 12000
5700 7000
12000
Min. CFM ➁ ➂
2222 2222
2222
2593
2593 2593
2963 2963
2963
Model Size (Digits 4-6)500600700
Btu/Hr Input ➀
500,000 500,000
500,000 600,000 600,000 600,000
700,000700,000
700,000
Btu/Hr Output ➀
400,000 400,000
400,000 480,000 480,000 480,000
560,000560,000
560,000
Blower Style (Digit 16 Letter)
G or HI, J, or K
L G or H
I, J, or K
L
G or HI, J, or K
L
Max. Temp. Rise (°F)
120
120
120
120
120
120
120
120
120
Min. Temp. Rise (°F)
53
40
40
63
40
40
76
40
40
Max. CFM 7000 9259
9259
7000
11111 11111
6850 12963
12963
Min. CFM ➂
3086 3086
3086
3704
3704 3704
4321 4321
4321
Model Size (Digits 4-6)800840
960
Btu/Hr Input ➀
800,000
800,000
800,000 1,050,000 1,050,000 1,200,000 1,200,000
Btu/Hr Output ➀
640,000
640,000
640,000
840,000
840,000
G or H
I, J, or K
L
I, J, or K
L
I, J, or K
L
Max. Temp. Rise (°F)
120
120
120
120
120
120
120
Min. Temp. Rise (°F)
87
46
41
60
60
68
63
Max. CFM 6850
13000
14500
12963
12963
13000
14500
Min. CFM ➂
4938
4938
4938
6481
6481
7407
7407
Blower Style (Digit 16 Letter)
➀
➁
➂
960,000 960,000
Ratings are shown for elevations up to 2000 ft. For higher elevations the input rating should be reduced at the rate of 4% for each 1000 feet above sea level.
For Canada, in elevations between 2000 and 4500 feet, the unit must be derated to 90% of the rating listed above.
For Cooling capacities see page 62.
For Variable Air Movement Applications, see page 23.
18
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 19.1
Air Temperature Rise
Btu/Hr ➀
Air Temperature Rise through Unit (°F)
Input Output2025303540455055606570758085
90
95100
Max
CFM
75,000 60,000
2778 2222 1852 1587 1389 1235 1111 1010
926
794
741
694
654
617
585
100,00080,000
3704 2963 2469 2116 1852 1646 1481 1347 1235 1140 1058
988
926
871
823
780
741
125,000100,000 4630 3704 3086 2646 2315 2058 1852 1684 1543 1425 1323 1235 1157 1089 1029
975
926
855
Min➁
556
150,000120,000 5556 4444 3704 3175 2778 2469 2222 2020 1852 1709 1587 1481 1389 1307 1235 1170 1111
175,000140,000
-
5185 4321 3704 3241 2881 2593 2357 2160 1994 1852 1728 1620 1525 1440 1365 1296
200,000160,000
-
5926 4938 4233 3704 3292 2963 2694 2469 2279 2116 1975 1852 1743 1646 1559 1481
225,000180,000
-
6667 5556 4762 4167 3704 3333 3030 2778 2564 2381 2222 2083 1961 1852 1754 1667
250,000200,000 9259 7407 6173 5291 4630 4115 3704 3367 3086 2849 2646 2469 2315 2179 2058 1949 1852
300,000240,000 11111 8889 7407 6349 5556 4938 4444 4040 3704 3419 3175 2963 2778 2614 2469 2339 2222
350,000280,000
-
10370 8642 7407 6481 5761 5185 4714 4321 3989 3704 3457 3241 3050 2881 2729 2593
400,000320,000
-
11852 9877 8466 7407 6584 5926 5387 4938 4558 4233 3951 3704 3486 3292 3119 2963
Btu/Hr ➀
Air Temperature Rise through Unit (°F)
Input Output40455055606570758085
90
500,000400,000
600,000480,000
700,000560,000
800,000640,000
1,050,000840,000
1,200,000 960,000
Max
9259 8230 7407 6734 6173 5698 5291
11111 9877 8889 8081 7407 6838 6349
12963 11523 10370 9428 8642 7977 7407
14500 13000 11852 10774 9877 9117 8466
-
-
-
- 12963 11966 11111
-
-
-
-
- 13675 12698
4938
5926
6914
7901
10370
11852
95100105110115120
CFM
4630 4357
5556 5229
6481 6100
7407 6972
9722 9150
11111 10458
4115
4938
5761
6584
8642
9877
3899
4678
5458
6238
8187
9357
3704
4444
5185
5926
7778
8889
3527
4233
4938
5644
7407
8466
3367
4040
4714
5387
7071
8081
3221
3865
4509
5153
6763
7729
Min➁
3086
3704
4321
4938
6481
7407
➀
Ratings are shown for elevations up to 2000 ft. For higher elevations the input rating should be reduced at the rate of 4% for each 1000 feet above sea level. For
Canada, in elevations between 2000 and 4500 feet, the unit must be derated to 90% of the rating listed above.
➁
For Variable Air Movement Applications, see page 23.
Air Temperature Limits
The maximum allowable discharge air temperature is 150°F. The maximum allowable air temperature rise per furnace for Low Air
Temperature Rise Units is 60°F. All system units are designed for a maximum allowable total static pressure of 3.0" W.C.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
19
Gas-Fired Indoor and Outdoor Duct Furnaces
Model Digit Descriptions
Once the first six digits of the model number have been
determined from model nomenclature, page 75, the pages
20 through 25 detail the specification of the additional
model number digits. For the complete model nomenclature
description see page 75.
Digit 7
Heat Exchanger/Burner/Drip Pan Material (HE)
Specifies the material for the heat exchanger, burner, and drip
pan material. A 409 stainless steel heat exchanger and burner
is recommended when the unit is installed downstream of a
cooling coil or evaporative cooler, and when combined entering/
return air to the unit is below 40°F.
A =Aluminized steel heat exchanger, burner, and drip pan
S =409 Stainless steel heat exchanger and burner and an
aluminized steel drip pan
T = 409 Stainless steel heat exchanger, burner and drip pan
Digit 8
Development Sequence (DS)
Used for internal factory purposes to indicate the style of
controls used on the unit.
F = Single stage gas controls
M =Two stage, mechanical, or electronic modulating
Digit 9
Access Side (AS)
Determines the side of the unit on which the controls are
accessed. The control side is determined by looking in the
discharge of the unit (air blowing into your face) and then
specifying the access side (right or left hand). Includes access
to gas controls, vent connections, electrical control wiring,
motor and motor sheave adjustment, the damper motor, and
linkage adjustment. For duct furnaces it also indicates the
discharge side of the unit for any optionally mounted discharge
air components.
R =Right Hand
L =Left Hand
Digit 10
Air Temperature Rise (ATR)
Indicates the temperature range of each duct furnace.
For Indoor Gravity Vented Duct Furnaces:
All Units are factory supplied with an air distribution baffle to
direct the air toward the bottom of the heat exchanger where
the heat exchanger tubes are the warmest. The baffle is
required because of the low air volume (CFM) that is going
through the duct furnace. This applies to units having an air
temperature rise from 60 to 100°F. If the application will be
operating with an air temperature rise less than 60°F it is
recommended that the baffle be removed in the field to reduce
pressure drop through the unit. Select N for this digit.
For Separated Combustion and Outdoor Duct Furnaces:
High air temperature rise units (20°-100°F) include an air
distribution baffle to direct the air toward the bottom of the heat
exchanger where the heat exchanger tubes are the warmest.
The baffle is required because of the low air volume (CFM) that
is going through the duct furnace. The primary restrictor plate
is factory sized to provide the 80% efficiency of the unit. High
air temperature rise units are certified to be used at down to
a 20°F rise, however it is recommended to use them from the
60°-100°F range to reduce the system pressure drop. Low air
temperature rise units do not include an air distribution baffle
and thus the pressure drop of the unit is reduced. However,
the primary restrictor plate is factory sized to provide the 80%
efficiency of the unit.
20
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
For System Units:
The primary restrictor is changed for separated combustion
and outdoor units to provide the 80% efficiency of the unit.
For gravity vented no changes are made. The blower section
transition insures the proper distribution of the airflow across
the heat exchanger.
Multiple Furnace Units 500-960
For Models IBG500-960, Digit 10=N
For Models IBS/OBG/OBP/ODG/ODP500-960, Digit 10=L
Specifying the Air Temperature Rise for Variable Air Movement
Applications (Separated Combustion and Outdoor Only)
The selection of the unit should be based on the low speed
temperature rise of the unit. Thus, if the high speed air
temperature rise is 40°F and the low speed air temperature
rise is 80°F, a high air temperature rise unit should be selected.
H =High Temperature Rise - 20°-100°F
L = Low Temperature Rise - 20°-60°F
Digit 11
Gas Type (GT)
Determines the type of gas that will be used with the unit and
the style of ignition controller. The type of gas determines the
orifices used on the unit. The orifices are sized for elevations
up to 2000 feet. For United States elevations of 2000 feet or
greater, specify this at the time of ordering and the unit will be
derated 4% per 1000 feet of elevation. In Canada for elevations
of 2000 to 4500 feet, the unit is derated 10%.
S =Natural with standing pilot
Pilot is on continuously. On call for heat, power is supplied
to combination gas control. The main burner will light
immediately. Available on single stage units only.
T = Propane with standing pilot
Pilot is on continuously. On call for heat, power is supplied
to combination gas control. The main burner will light
immediately. Available on single stage units only.
N =Natural gas with continuous retry ignition controller
A 100% shut-off with continuous retry ignition controller
is used. On a call for heat, the system will attempt to light
the pilot for 70 seconds. If the pilot is not sensed for any
reason, the ignition control will wait for approximately
six minutes with the combination gas control closed and
no spark. After six minutes, the cycle will begin again.
After three cycles, some ignition controllers lockout for
approximately one hour before the cycle begins again.
This will continue indefinitely until the pilot flame is
sensed or power is interrupted to the system.
P =Propane gas with continuous retry ignition controller
(Gravity vented and separated combustion indoor units)
A 100% shut-off with continuous retry ignition controller
is used. On a call for heat, the system will attempt to light
the pilot for 70 seconds. If the pilot is not sensed for any
reason, the ignition control will wait for approximately
six minutes with the combination gas control closed and
no spark. After six minutes, the cycle will begin again.
After three cycles, some ignition controllers lockout for
approximately one hour before the cycle begins again.
This will continue indefinitely until the pilot flame is sensed
or power is interrupted to the system.
P =Propane gas with lockout ignition controller (Outdoor units)
For propane gas units, a 100% shut-off with lockout ignition
controller is used. On a call for heat, the system will attempt
to light the pilot for 70 seconds. If the pilot is not sensed
for any reason, the ignition control will lockout, the pilot gas
valve will shut off and the sparking discontinued. The system
will not attempt to relight until power has been interrupted to
the controls and the controls are reset via the thermostat.
Gas-Fired Indoor and Outdoor Duct Furnaces
Digit 12
Gas Valve (GV)
Determines the type of gas valve provided with each unit.
1 = Single-stage
Single-stage gas controls utilize a single-stage combination
gas control, an ignition control, and a single-stage low
voltage thermostat. The unit fires at 100% full fire based
on a call for heat from a room thermostat (thermostat
ordered separately).
2 = Two-stage
Two-stage gas controls utilize a two-stage combination gas
control, an ignition control, and a two-stage low voltage
thermostat. The unit fires at 50% fire on low stage or
100% fire on high stage of the unit based on the call for
heat from either a room or duct thermostat (thermostat
ordered separately).
3 = Mechanical modulation ➀
Mechanical modulation gas controls utilize a mechanical
modulating gas control and an ignition control. The system
is designed primarily for use in constant blower (makeup air) applications. The discharge air temperature is
maintained by setting the non-electric control dial of the
modulating gas valve in one of ten positions ranging from
Lo to Hi. A hydrostatic sensing bulb that is mechanically
attached to the modulating gas valve is factory installed
in the discharge air stream and modulates the gas flow.
Modulation occurs between 40% through 100% full
fire. When the discharge air hydrostatic sensing bulb is
satisfied, the modulating valve closes completely. The
hydrostatic sensing bulb is included with the system.
Because this control is non-electric, it cannot be used with
a room override thermostat.
4 = Electronic Modulation ➀
Electronic modulation gas controls utilize an electronic
modulating/regulating gas control, combination gas valve,
an ignition control, modulating amplifier and either a
modulating room thermostat or modulating duct thermostat
with remote temperature set point adjuster. The thermostat
can modulate the system gas flow between 40% through
100% full fire. Requires the addition of either the room or
duct electronic modulating thermostat.
When the duct thermostat is utilized, a room override
thermostat can be added. When calling for heat, the room
override thermostat provides full fire operation until the
space temperature is satisfied. Control is then returned to
the duct sensing control. In this situation, either the duct
thermostat or the room override thermostat can call for
heat.
5 = Electronic Modulation - Master ➀
(duct furnaces only)
Used in higher Btu/hr input applications where more than
one duct furnace is being used with electronic modulating
gas controls. Allows one duct sensing thermostat to
control the firing rate of the Master duct furnace and up
to three Slave duct furnaces (See 6 = Slave). Utilizes the
same controls as described in 4 = Electronic Modulation,
except that a single duct furnace amplifier is replaced
by a multiple furnace amplifier. The multiple furnace
amplifier sends a signal to all of the gas valves so that they
modulate at the same percentage. When the thermostat is
satisfied, the amplifier cuts power to the combination gas
valves of the Master unit and all Slave units which prevents
gas flow to both the main and pilot burners.
6 = Electronic Modulation - Slave ➀
(duct furnaces only)
Requires one Master unit. The Slave furnace includes an
electronic modulating/regulating gas control, combination
gas valve, and an ignition control, but no modulating
amplifier and does not require a discharge air thermostat.
The modulating gas valve receives the modulation
percentage from the Master duct furnace. Up to three
Slave duct furnaces can be connected to one Master unit.
7 = Electronic Modulation - 0-10 Vdc External Input ➀
Allows for control of the duct furnace firing rate by a
Building Management System (BMS). Utilizes an electronic
modulating/regulating gas control, combination gas valve,
an ignition control, modulating signal conditioner, and an
inverted 0-10 Vdc input signal provided by a BMS
(0 Vdc being high fire and 10 Vdc being low fire). The
signal conditioner can modulate the gas flow between 40%
and 100% full fire. When the BMS thermostat (supplied
by others) is satisfied, the BMS heat contact (supplied by
others) opens to cut power to the combination gas valve
which prevents gas flow to both the main and pilot burners.
8 = Electronic Modulation - 4-20 mA External Input ➀
Allows for control of the duct furnace firing rate by a
Building Management System (BMS). Utilizes an electronic
modulating/regulating gas control, combination gas valve,
an ignition control, modulating signal conditioner, and
an inverted 4-20 mA input signal provided by a BMS (4
mA being high fire and 20 mA being low fire). The signal
conditioner can modulate the gas flow between 40% and
100% full fire. When the BMS thermostat (supplied by
others) is satisfied, the BMS heat contact (supplied by
others) opens to cut power to the combination gas valve
which prevents gas flow to both the main and pilot burners.
Digit 13
Additional Safety Switches (SS)
Provides additional gas train safety devices.
A low gas pressure switch monitors the gas supply pressure
ahead of all the gas controls and shuts off the electric supply
to the ignition controller and combination gas valve if low gas
pressure is experienced. This will shut off all gas flow to the
burner. If the gas pressure to the unit is below the normal
operating pressure, the burner could have difficulty lighting
properly. The switch has an automatic reset so that if the
gas pressure is interrupted and then returned, the switch will
automatically allow the unit to operate when gas conditions are
returned to the allowable range of the pressure switch.
continued
➀ Requires Digit 11=N or P
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
21
Gas-Fired Indoor and Outdoor Duct Furnaces
A high gas pressure switch monitors the gas supply pressure
downstream of all the gas controls and shuts off the electric
supply to the ignition controller and combination gas valve if
high gas pressure is experienced right before the manifold.
This will shut off all gas flow to the burner. If the gas pressure
to the unit is too high, the gas controls could be damaged and
cause the unit to over fire. The switch has an manual reset so
that if the gas pressure is too high, a service person must check
the unit to make sure that none of the gas controls have been
damaged by the high gas pressure and then reset the switch to
allow the unit to operate when the gas conditions are returned
to the allowable range of the pressure switch.
If no additional safety switches are ordered a standard control
box may be selected for the gravity vented indoor duct furnace.
This option is not available for indoor gravity vented system units,
indoor separated combustion units or outdoor units, all which
require the use of the premium Control box.
0 = No Additional Safety Switches (Premium Control Box)
1 = Low Gas Pressure Switch (Premium Control Box)
2 = High Gas Pressure Switch (Premium Control Box)
3 = High and Low Gas Pressure Switch (Premium Control Box)
4 = No Additional Safety Switches (Standard Control Box)
Digit 14
Supply Voltage (SV)
Indicates the supply voltage for the unit. For duct furnace units,
this specifies the line voltage to 24V control transformer that
will be provided with the unit. For system units, this specifies
the control transformer voltage in addition to the blower motor
voltage.
A = 115V/60Hz/1Ph
B = 208V/60Hz/1Ph
C = 230V/60Hz/1Ph
D = 208V/60Hz/3Ph
E = 230V/60Hz/3Ph
F = 460V/60Hz/3Ph
G = 575V/60Hz/3Ph
Digit 15
Transformer (TR)
Indicates the size of the step-down transformer that converts
line voltage power to low voltage for use with the gas controls.
The transformer size is rated in volt-amps (VA). 40 VA transformers are Class II with integral fusing. 75 VA transformers
are Class II with a 3.2A circuit breaker. 150 VA and 250 VA
transformers include separate primary fusing. The size of the
transformer should be specified based on Table 22.1.
1 = 40 VA
2 = 75 VA ➀
3 = 150 VA ➀
4 = 250 VA ➀
0 = None
Table 22.1
Gas Control Transformer Sizing
Model Size
75-400
500-800
840-960
Unit Type
Controlling Digit 15
Non Master Duct Furnace
1
Master Duct Furnace
1 Slave ➀
2
Master Duct Furnace
2 Slaves ➁
3
Master Duct Furnace
3 Slaves ➁
3
Slave Duct Furnace
0
All System Units
2
All
3
Digit 12 = 1, 2, or 3
3
Digit 12 = 4, 7, or 8
4
➀ Digit 13 must equal 0,1,2, or 3
➁
When 0,1,2,3
Digit 14 = F or G, Digit 13 must equal 0,1,2, or 3
st equal
Note: When specifying an duct furnace, only the first fifteen digits of the model need to be specified. The additional eight digits are for System units.
22
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Digit 16
Blower Size and Bearing Type (BB)
All System units are offered with at least two blower sizes
available with the units 200,000 Btu/Hr input and greater
offering three blower sizes (See Table 18.1). To determine the
proper blower size, review the blower performance curves to for
the desired model size and insure that the required CFM and
total static pressure (internal static pressure + external static
pressure) are on the curve selected. For additional information
on determining the proper blower size, review the Sizing and
Selection Example on pages 36 and 37.
The blower assembly is available with either spider bearings or
greaseable pillow block ball bearings. The spider bearing option
includes blower mounted bearing brackets with ball bearings.
Spider bearings are designed for use in low blower rpm and
low motor horsepower applications. For units where Digit 16
is A, C, E, or G, the recommended limits are 1900 blower rpm
and a 5 Hp motor. For units where Digit 16 = I, the required
limits are 1200 blower rpm and a 10 Hp motor.
The pillow block bearing option includes two heavy duty pillow
block bearing housings with internal ball bearings that are
rigidly fastened to two 18 gauge minimum blower support
channels. Pillow block bearings are available for all applications, but are required for high blower rpm and high motor
horsepower applications that exceed the spider bearing limits.
A=9-7 blower wheel with spider bearings
B=9-7 blower wheel with pillow block bearings
C=9-9 blower wheel with spider bearings
D=9-9 blower wheel with pillow block bearings
E=12-12 blower wheel with spider bearings
F=12-12 blower wheel with pillow block bearings
G=15-15 blower wheel with spider bearings
H=15-15 blower wheel with pillow block bearings
I =18-18 blower wheel with spider bearings under 15 Hp
J =18-18 blower wheel with pillow block bearings under 15 Hp
K=18-18 blower wheel with pillow block bearings for 15 Hp & up
L=20-18 blower wheel with pillow block bearings
Digit 17
Motor Horsepower (HP)
The required motor horsepower is determined by the required
CFM and total static pressure (internal static pressure + external
static pressure) when plotted on the blower performance curve
selected. When determining the motor horsepower, always
select the motor horsepower to the right of the job conditions.
For additional information on selecting the proper motor
horsepower, review the Sizing and Selection Example on pages
36 and 37. Refer to pages 44 through 48 to determine if the
selected motor has thermal overload protection. Motors that
do not have internal thermal overload protection and all three
phase motors, require a motor starter that is either factory
installed or supplied by others and field installed.
A =
B =
C =
D =
E =
F =
G =
H =
I =
J =
K =
V =
1/3 Hp
1/2 Hp
3/4 Hp
1 Hp
1-1/2 Hp
2 Hp
3 Hp
5 Hp
7-1/2 Hp
10 Hp
15 Hp
20 Hp
L =
M=
N =
P =
Q =
R =
S =
T =
W=
X =
Y =
Z =
1/3 Hp with motor starter
1/2 Hp with motor starter
3/4 Hp with motor starter
1 Hp with motor starter
1-1/2 Hp with motor starter
2 Hp with motor starter
3 Hp with motor starter
5 Hp with motor starter
7-1/2 Hp with motor starter
10 Hp with motor starter
15 Hp with motor starter
20 Hp with motor starter
Gas-Fired Indoor and Outdoor Duct Furnaces
Digit 18
Digit 19
Motor Type (MT)
Sheave Arrangement (SA)
Blower motors are available in Open Drip Proof (ODP), Totally
Enclosed (TE), High Efficiency ODP and TE, and Two-Speed
ODP and TE 1800/1200 RPM and 1800/900 RPM. All motors
are continuous duty, ball bearing type, Class “B” insulated with
a rigid base. For the list of available motors based on supply
voltage, refer to pages 44 through 48. These tables also include
frame sizes, amp draws, service factors, efficiencies, thermal
overload protection, and weights. Motors that do not have
internal thermal overload protection and all three phase motors,
require a motor starter that is either factory installed or supplied
by others and field installed. Where applicable, all motors meet
the Requirements of the Energy Policy Act of 1992.
All System units are provided with adjustable motor sheaves
so that the blower rpm can be adjusted for slight increases or
decreases in the actual job external static pressure as compared
to the design external static pressure. The adjustable motor
sheaves can also be used to increase or decrease the CFM of
the unit. The adjustment range of the sheave is shown in the
Sheave Selection Tables on page 42.
Variable Air Movement Applications
Two-speed motors are classified by the motor high speed and
low speed RPM (either 1800/1200 or 1800/900). The motor rpm
directly relates to the CFM percentage. When an 1800/1200
RPM motor is used, the low speed CFM will be 66% of the high
speed CFM. When an 1800/900 RPM motor is used, the low
speed CFM will be 50% of the high speed CFM.
Example:
The unit is designed for 5000 CFM at high speed and is
provided with an 1800/1200 RPM motor. What is the low
speed CFM?
Solution:
5000 CFM x 0.66 = 3300 CFM at low speed
Units may be supplied with variable frequency drives for
applications where variable air volume is required. The minimum
air flow may be varied between 30 and 100% of the full speed
airflow depending on the controls selection of the unit. Due to the
extra restrictions of the controller all selections must be performed
with the AccuSpec configuration software. Within AccuSpec, three
variable frequency drive speed control changeover options are
available:
1. Two speed which may be controlled by a manual high/low
switch which may be factory mounted on the control panel or
shipped loose for field installation or by exhaust fan interlocks.
2. Floating building pressure sensing which utilizes a photohelic
pressure controller to adjust the building pressure by varying
the amount of makeup air supplied to the space.
3. Building management control which allows for an external
signal of 0-10VDC of 4-20mA to adjust the unit airflow
Additionally, when the air mover supplied by others can provide
variable air movement (i.e. two-speed units), the certified
allowable minimum CFM of the System units can be 66% of the
minimum listed CFM in Table 18.1 if the unit is applied as follows:
1. The unit is provided with two-stage, mechanical modulation, or
electronic modulation gas controls.
2. The unit is provided with a factory installed discharge air
controller.
3. The system does not include a room thermostat.
The factory installed discharge air thermostat will prevent the unit
from firing above the allowable 100°F rise when the unit is at or
above the minimum CFM by monitoring the discharge air and
going to low fire. A room thermostat, because it is located remote
from the unit, could cause the unit to over-fire.
1 = Open Drip Proof (ODP)
2 = ODP, High Efficiency (ODP HE)
3 = ODP, Two-Speed 1800/900 RPM
4 = ODP, Two-Speed 1800/1200 RPM
5 = Totally Enclosed (TE)
6 = TE, High Efficiency (TE HE)
7 = TE, Two-Speed 1800/900 RPM
8 = TE, Two-Speed 1800/1200 RPM
Digits 20 and 21
Air Control (AC)
The Air Control digits determine the entering air locations to the
blower, the type of damper motor, and the damper motor controller.
If a damper motor is provided, it is mounted directly to the shaft
of the fresh air damper. If fresh air and return air dampers are
provided, the two dampers are mechanically linked to provide
easy adjustment at the job site. All fresh air dampers are ultra
low leak, Class II leakage resistance (less than 10 CFM/ft2 at 1"
W.C.) dampers with self-compensating stainless steel side seals
and santoprene and galvanized steel blade seals. All return air
dampers, which are used for air balancing, shall be low leak, Class
III leakage resistance (less than 40 CFM/ft2 at 1" W.C.) dampers
with self-compensating stainless steel side seals and santoprene
blade seals. All damper motors are spring return (except Air
Control HP) so when the damper motor is de-energized the fresh
air opening is closed. All two-position damper motors contain one
normally open and one normally closed end switch.
The Fresh Air and Return Air openings are defined as follows:
The fresh air opening is defined as a back inlet to the unit.
The return air opening is defined as a bottom inlet to the unit.
AA = Return Air Opening
This configuration is typically used for heating only units
in which 100% of the air is recirculated from the space.
In this configuration, the unit does not contain a damper
and the back of the unit does not contain an opening for
outside air.
BA = Fresh Air Opening
This configuration is typically used for heating only units
in which 100% of the air is recirculated from the space.
In this configuration, the unit does not contain a damper
and the bottom of the unit does not contain an opening
for return air.
CA = Fresh Air and Return Air Openings
This configuration is typically used for heating only units
in which the return air will be brought to the unit from both
the bottom and the back of the unit. In this configuration,
the unit does not contain a damper in either opening.
DA = Fresh Air Dampers with Two-Position Damper Motor with
No Return Air
This configuration is typically used for 100% make-up air
units. In this configuration, the bottom of the unit does not
contain an opening for return air.
EA = Fresh Air and Return Air Dampers with Two-Position
Damper Motor
This configuration is typically used for heating and
make-up air units that require 100% outside air during
the daytime (or occupied mode) and 100% return air during
the evening (or unoccupied mode). The damper motor can
be energized by a switch (day/night, occupied/unoccupied,
etc.) to control the damper position.
continued
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
23
Gas-Fired Indoor and Outdoor Duct Furnaces
EQ = ASHRAE Cycle I - Fresh Air and Return Air Dampers
with Two-Position Damper Motor with Warm-Up
Thermostat
This configuration is typically used for heating and
make-up air units that require 100% outside air during
the daytime (or occupied mode) and 100% return air
during the evening (or unoccupied mode). The damper
motor can be energized by a switch (day/night, occupied/
unoccupied, etc.) to control the damper position. The
warm-up thermostat is provided so that when the unit
is switched into the 100% outside air mode, the return
air temperature is monitored and prevents the fresh air
damper from opening until the temperature of the return
air has reached the desired set point (usually 5°F below
the room temperature).
FA = Fresh Air Dampers and Return Air Opening with
Two-Position Damper Motor
This configuration is typically used for heating and makeup air units that require a mix of outside air and return
air during the daytime (or occupied mode) and 100%
return air during the evening (or unoccupied mode).
The damper motor can be energized by a switch (day/
night, occupied/unoccupied, etc.) to control the damper
position.
GA = Fresh Air and Return Air Dampers with Modulating
Damper Motor with 0-10 Vdc External Input Signal
This configuration is typically used for heating and makeup air units that require a mix of outside air and return
air with the percentages being controlled by a Building
Management System (BMS). The BMS would provide
the control of the dampers through a 0-10Vdc external
input signal.
GB = Fresh Air and Return Air Dampers with Modulating
Damper Motor with 4-20 mA External Input Signal
This configuration is typically used for heating and makeup air units that require a mix of outside air and return
air with the percentages being controlled by a Building
Management System (BMS). The BMS would provide
the control of the dampers through a 4-20 mA external
input signal.
GC = Fresh Air and Return Air Dampers with Modulating
Damper Motor with Minimum Positioner
This configuration is typically used for heating and makeup air units that require a mix of outside air and return
air with the percentage of outside air being the same at
all times. Includes a factory mounted manual positioner
in the blower section electrical cabinet that can be field
set for the desired outside air percentage. When the unit
is energized, the outside air damper would open to the
preset percentage.
GD = Fresh Air and Return Air Dampers with Modulating
Damper Motor with Remote Positioner
This configuration is typically used for heating and makeup air units that require a mix of outside air and return
air with the percentage of outside air being changed
throughout the day. The remote positioner is field
mounted in the space so that the percentage of outside
air can be manually changed from the space depending
on the ventilation requirement. If a remote monitoring
panel is ordered, the remote positioner can be mounted
on the panel. When the unit is energized, the outside air
damper would open to the preset percentage.
24
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
GE = Fresh Air and Return Air Dampers with Modulating
Damper Motor for Three Positions
This configuration provides three positions (100% return
air, a field adjustable percentage of outside and return
air, and 100% outside air) of air control. It is typically
used for heating and make-up air units that require
100% return air during the evening, a mix of outside air
and return air during most of the daytime, and 100%
outside air when an exhaust fan is operating. Includes a
factory mounted manual positioner in the blower section
electrical cabinet that can be field set for the desired
outside and return air percentage. Also includes terminal
strip contacts to provide 100% outside air when an
exhaust fan contact (by others) is closed.
GF = Fresh Air and Return Air Dampers with Modulating
Damper Motor with A350P Proportional Temperature
Controller
This configuration is typically used for heating and makeup air units that require a mix of outside air and return
air with the percentage of outside air being controlled by
a proportional temperature controller. The proportional
temperature controller monitors the temperature of the
mixed fresh and return air and is usually set at 55°F to
allow for first stage cooling. The proportional temperature
controller will open the fresh air dampers and
simultaneously close the return air dampers to maintain
the preset mixed air temperature in the blower section of
the unit. The fresh air dampers will modulate from zero
to 100% open depending on the mixed air temperature.
Includes a factory mounted A350P proportional
temperature controller in the blower section electrical
cabinet that can be field set for the desired outside air
position with the sensing bulb factory mounted in the
mixed air stream of the blower section.
GG = Fresh Air and Return Air Dampers with Modulating
Damper Motor with Minimum Positioner and A350P
Proportional Temperature Controller
This configuration is typically used for heating and makeup air units that require a mix of outside air and return
air with the percentage of outside air being controlled
by proportional temperature controller with a required
percentage of outside air at all times. The minimum
positioner sets the minimum percentage of outside
air that will be provided at all times. The proportional
temperature controller monitors the temperature of the
mixed fresh and return air and is usually set at 55°F to
allow for first stage cooling. The proportional temperature
controller will open the fresh air dampers and
simultaneously close the return air dampers to maintain
the preset mixed air temperature in the blower section
of the unit. The fresh air dampers will modulate from the
minimum percentage (set by the minimum positioner)
to 100% open depending on the mixed air temperature.
Includes a factory mounted minimum positioner and
A350P proportional temperature controller in the blower
section electrical cabinet that can be field set for the
desired outside air position with the sensing bulb factory
mounted in the mixed air stream of the blower section.
continued
Gas-Fired Indoor and Outdoor Duct Furnaces
GH = Fresh Air and Return Air Dampers with Modulating
Damper Motor with Remote Positioner and A350P
Proportional Temperature Controller
This configuration is typically used for heating and
make-up air units that require a mix of outside air and
return air with the percentage of outside air being
controlled by proportional temperature controller with
a required percentage of outside air at all times. The
remote positioner (field mounted) sets the minimum
percentage of outside air that will be provided at all
times. The proportional temperature controller monitors
the temperature of the mixed fresh and return air and is
usually set at 55°F to allow for first stage cooling. The
proportional temperature controller will open the fresh
air dampers and simultaneously close the return air
dampers to maintain the preset mixed air temperature
in the blower section of the unit. The fresh air dampers
will modulate from the minimum percentage (set by
the remote positioner) to 100% open depending on
the mixed air temperature. Includes a factory mounted
A350P proportional temperature controller in the blower
section electrical cabinet that can be field set for the
desired outside air position with the sensing bulb factory
mounted in the mixed air stream of the blower section.
If a remote monitoring panel is ordered, the remote
positioner can be mounted on the panel.
GJ = Fresh Air and Return Air Dampers with Modulating
Damper Motor with Fresh Air Enthalpy Controller
This configuration is typically used for heating and
make-up air units that require first stage ventilation in
the summer. The load on the mechanical cooling system
is reduced by mixing the percentage of outside air and
return air based on the outside enthalpy, which is a
combination of the temperature and humidity. As the
enthalpy of the outside air decreases, the outdoor air
damper opens to bring in more outside air to reduce
the cooling load of the building. The enthalpy controller
includes an adjustable minimum outside air positioner.
GK = ASHRAE Cycle II - Fresh Air and Return Air Dampers
with Modulating Damper Motor with Minimum Positioner,
A350P Proportional Temperature Controller, and
Warm-Up Thermostat
Identical to Air Control GG with the addition of a factory
installed warm-up thermostat. The warm-up thermostat
is provided so that when the unit is switched into the
daytime mode, the return air temperature is monitored
and prevents the fresh air damper from opening until the
temperature of the return air has reached the desired set
point (usually 5°F below the room temperature).
GM = ASHRAE Cycle II - Fresh Air and Return Air Dampers
with Modulating Damper Motor with Remote Positioner,
A350P Proportional Temperature Controller, and
Warm-Up Thermostat
Identical to Air Control GH with the addition of a factory
installed warm-up thermostat. The warm-up thermostat
is provided so that when the unit is switched into the
daytime mode, the return air temperature is monitored
and prevents the fresh air damper from opening until the
temperature of the return air has reached the desired set
point (usually 5°F below the room temperature).
GN = ASHRAE Cycle III - Fresh Air and Return Air Dampers
with Modulating Damper Motor with A350P Proportional
Temperature Controller, and Warm-Up Thermostat
Identical to Air Control GF with the addition of a factory
installed warm-up thermostat. The warm-up thermostat
is provided so that when the unit is switched into the
daytime mode, the return air temperature is monitored
and prevents the fresh air damper from opening until the
temperature of the return air has reached the desired set
point (usually 5°F below the room temperature).
HP = Fresh Air and Return Air Dampers with Floating Damper
Motor with Space Pressure Controller
This configuration is typically used to maintain a slightly
positive pressure in the building to reduce infiltration.
It is also used to provide heating and make-up air for
buildings that have multiple exhaust loads that cannot
be interlocked to one make-up air unit. Includes a field
installed photohelic pressure controller, relay, outside air
pressure sensor, and 50 feet of 1/8" tubing to connect to
the sensor. The photohelic pressure controller allows for
easy adjustment of the high and low building pressure
limits and includes an indicator showing the actual
building pressure. The fresh air and return air dampers
float to keep the building pressure between the desired
limits. The limits are field adjustable between 0 and 0.25"
W.C. When the unit is de-energized, a relay contact
closes the outside air dampers.
JA = Manual Fresh Air and Return Air Dampers
This configuration is typically used for heating and
make-up air units for which the damper position will
never change. Includes a manual stop to hold the
dampers open.
KA = Manual Fresh Air Dampers and Return Air Opening
This configuration is typically used for heating and
make-up air units for which the damper position will
never change. Includes a manual stop to hold the
dampers open.
Digit 22
Evaporative Cooling (EC) (Outdoor Units)
The factory installed evaporative cooling option provides an
economical means of supplying conditioned air to a space.
Available in two media types and depths. For additional
information on specification and selection, see pages 69-70.
0
3
4
5
6
= No Evaporative Cooler
= 6'' Munsters® CELdek Media
= 12'' Munsters® CELdek Media
= 6'' Munsters® GLASdek Media
= 12'' Munsters® GLASdek Media
Digit 23
Cooling Coil (CC)
For units with the cooling cabinet option (model sizes 75-400
only), this option indicates if the cooling coil is to be provided
factory installed or by others. For determining the maximum
size of the cooling coil and dimensions of the cabinet, see page
62.
0 = Coil By Others
1 = Factory Installed Coil
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
25
Gas-Fired Indoor and Outdoor Duct Furnaces
Options - Factory Installed
8
Figure 26.1
Factory Mounted
Option Locations
6
56
9
46
8
46
12
57
6
4
2
13
13
5
55
12
11
8
9
13
10
3
1
10
5
48
9
STANDARD UNITS
1
6
50
LOW
PRESSURE
MODEL
RLGP-A
M1
3
mm.
ADDISON
IL. U.S.A.
IN.
PREMIUM UNITS
R
LOW
PRESSURE
MODEL
RLGP-A
M1
Indoor
Gravity Vented
Duct Furnace
2
4
6
8
10
12
14
50
100
150
200
250
300
350
W.C.
FM
2
2
4
6
8
10
12
14
50
100
150
200
250
300
350
mm.
LISTED
PRESSURE
OPERATED
SWITCH
504H
Indoor
Separated
Combustion
Duct Furnace
ADDISON
IL. U.S.A.
IN.
W.C.
R
FM
LISTED
PRESSURE
OPERATED
SWITCH
504H
50
49
52
52
51
58
49
51
46
48
47
47
Outdoor
System Unit
NOTE: Common blower cabinet for all above units.
1. Discharge Thermostat
21.Extended Grease Lines
2. Low Gas Pressure Switch
22.Return Air Fire Stat
3. High Gas Pressure Switch
23.Blower Housing
4. Power Exhauster
24.Pillow Block Bearings
5. Timed Freeze Protection
25.Blower Motor
6. Ignition Controller
26.Filters
7. Combustion Air/Exhaust Cap
27.Fresh Air Damper
8. Control Relay
28.Enthalpy Sensor (Outdoor only)
9. Time Delay Relay
29.Rainhood and Birdscreen (Outdoor only)
10.Furnace Low Voltage Terminal Strip
30.Direct Drive Damper Actuator
11.Power Exhauster Relay
31.Enthalpy Controller
12.Furnace Supply Power Terminal Strip
32.Damper to Damper Linkage
13.Control Step Down Transformer
33.Return Air Damper
14.Control Relay
34.Proportional Temp Controller Sensor
15.Blower Low Voltage Terminal Strip
35.Motor and Blower Vibration Isolation
16.Dead Front Disconnect Switch
36.Blower Support
17.Step Down Transformer Fuses
37.Convenience Outlet
18.Step Down Transformer
38.Blower Door Switch
19.Factory Installed Minimum Positioner
39.Dirty Filter Switch
20.Extended Grease Line Zerk Fittings
40.Motor Starter/VFD control
26
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
41.Mild Temperature Thermostat (Outdoor only)
42.Proportional Temp Controller
43.Warm-Up Stat
44.Blower Supply Power Terminal Strip
45.Service Switches
46.Electronic Modulating Amplifier
47.Electronic Modulating Gas Valve
48.Air Flow Proving Switch
49.High Limit Switch
50.Supply Air Fire Stat
51.Main Gas Valve
52.Burner Box
53.Direct Drive Damper Actuator (Outdoor only)
54.Discharge Damper (Outdoor only)
55.Differential Pressure Switch (Sep. Comb. only)
56.Blocked Vent Safety Switch
57.Control Terminal Board
58.Energy Cut off Switch
Gas-Fired Indoor and Outdoor Duct Furnaces
The following list details the factory installed options
available. For the location of all options, see Figure 26.1
Filters
All filters include an adjustable filter rack for 1” or 2” filters. Available
filters are:
1” Permanent
2” Farr® Aeropleat
2” Permanent
2” Farr® 30/30
Double Wall Construction
Includes a 22 gauge aluminized steel metal liner covering 1-1/2#
density insulation (ordered separate for indoor units). The metal
unit allows the interior of the unit to be wiped down for cleaning and
conforms to ASHRAE Standard 62-2001 - Ventilation for Acceptable
Indoor Air Quality. Available for Blower, Cooling and Downturn sections
where applicable.
Motor and Blower Vibration Isolation (35)
Includes rubber-in-shear grommets to isolate the blower and motor
assembly from the casing. The blower duct connection is not rigidly
mechanically fastened and the 1/4” thick gasketing around the duct
transition provides vibration isolation.
Extended Grease Lines (21)
(Requires Blower Pillow Block Bearings)
Includes factory installed grease lines extending from the blower
bearings to the outside of the unit cabinet. Also includes zerk fittings
for applying grease. Requires grease for initial start-up.
Control Relay (8)
Includes a 24v relay coil with double-pole, double throw (DPDT)
contacts for sequence of operation control switching. The two normally
open and two normally closed contacts are rated with a maximum of
30 amps @ 115V/1Ph. The relay is mounted in either the duct furnace
junction box or the electrical section depending on the relay function.
Convenience Outlet (37)
Includes a factory installed 15 amp @ 115V ground fault circuit
interrupter (GFCI) service receptacle in the blower section of the unit.
Requires a separate field connected 115V/1Ph power supply.
Blower Door Safety Switch (38)
Includes a safety switch that breaks power in the unit low voltage
control circuit when the blower door is opened.
Air Flow Proving Switch (48)
Manual Reset High Limit Switch (49)
The air flow proving switch is factory installed in the duct furnace
electrical junction box. The air flow proving switch monitors the pressure
differential between the duct furnace and the atmosphere. The purpose
of the air flow proving switch is to cut power to the gas controls if a
positive pressure is not measured by the switch. This could be caused
by a lack of air movement through the heat exchanger.
Note: The air flow proving switch will prevent any heat exchanger
warm-up because the gas controls can not be energized until
air flow is proven.
The manual reset high limit switch is factory installed in place of the
standard automatic reset high limit switch located in the duct furnace
electrical junction box. In case of a failure of the blower motor, blockage
of the inlet air, etc., the manual reset switch prevents the unit from
cycling on the high limit for a prolonged period of time. To prevent
building freezing, this option is not recommended for heating units that
are the only source of building heat.
Timed Freeze Protection (5)
The time delay relay is factory installed in the duct furnace electrical
junction box. The standard duct furnace is provided for instantaneous fan
operation. On a call for heat, the blower is energized (control by others)
at the same time as the gas controls. The optional time delay relay allows
the gas controls to operate for approximately 30 seconds before the
blower starts. This allows the heat exchanger a warm-up period so that
the initial delivered air is not cool. The time delay relay also keeps the
motor running for approximately 30 seconds after the call for heat has
been satisfied to remove the residual heat from the heat exchanger.
The timed freeze protection system is factory installed in the duct
furnace electrical junction box with the sensor (30°-58°F adjustable)
factory installed in the discharge air stream. On initial start-up, the
timed delay in the system allows the unit to go through the normal
ignition sequence. The timed delay is an automatic reset switch and
adjustable for 1-5 minutes. In the event that the unit fails to fire after
this period, the discharge air sensor will sense the cold air and will shut
down the entire unit.
Mild Temperature Thermostat (41)
The mild temperature thermostat is factory installed in the blower
electrical section for System Units and it senses outdoor air
temperature. The purpose of the mild temperature thermostat (45°-75°F
adjustable) is to cut power to the gas controls during mild weather so
that the unit does not cycle in an attempt to maintain a very low air
temperature rise. The mild temperature thermostat is usually set at
approximately 60°F or 5°-10°F below the duct or room thermostat.
For Indoor units and Outdoor non-system units, the mild temperature
thermostat (25°-225°F adjustable) is shipped loose for field installation
in the inlet air stream.
For Outdoor 500-960 field installed mild temperature thermostats
(either 25°-255°F or 0°-100°F adjustable) can be used to cut power to
individual duct furnaces based on outside air temperature to reduce the
amount of gas control cycling. One, two, or three mild temperature stats
can be used based on the number of duct furnaces.
Supply Air Fire Stat (50)
The supply air fire stat is factory installed in the duct furnace electrical
junction box with the sensor in the discharge air stream. In case of
elevated temperatures (200°F) in the supply air, the manual reset
switch shuts down the entire unit.
Return Air Fire Stat (22)
The return air fire stat is factory installed in the blower section electrical
junction box with the sensor in the return air stream. In case of elevated
temperatures (120°F) in the return air, the manual reset switch shuts
down the entire unit.
Time Delay Relay (9)
(Duct Furnace Units Only, Standard on System Units)
2-Position Damper Limiter
(Air Control EA and FA Only)
Mechanically prevents the outside air damper from opening completely
and results in a fixed outside/return air percentage any time the
dampers are energized. The outside air percentage must be specified
when ordering and can not be changed in the field.
Dirty Filter Pressure Switch (39)
Includes an adjustable differential pressure switch factory installed
in the blower section. The switch monitors the filter pressure drop to
determine if the filters are dirty. Required for remote monitoring panels
with a dirty filter light.
Evaporative Cooling and Power Exhausted Step Down
Transformers (18)
Evaporative cooling units which have a supply voltage of 208V/1Ph,
208V/3Ph, 460V/3Ph, or 575V/3Ph or power exhausted units that have
460V/3Ph, or 575V/3Ph require a step down transformer for the pump
motor. Refer to electrical data for transformer sizing.
Discharge Air Damper (Downturn plenum outdoor units only)
(54)
Used in 100% make-up air applications to prevent the building air from
infiltrating back into the unit. Includes a factory installed discharge
air damper and two-position damper motor located in the downturn
plenum. The discharge damper is an ultra low leak, Class II leakage
resistance (less than 10 CFM/ft2 at 1” W.C.) damper with self-compen
sating stainless steel side seals and santoprene and galvanized steel
blade seals. The damper motor includes end switches to prevent
the blower from operating when the damper is not open.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
27
Gas-Fired Indoor and Outdoor Duct Furnaces
Variable Frequency Drive (40)
Field Installed Disconnect Switches
The VFD controller adjusts the motor rpm to vary the unit
airflow. The minimum air flow may be varied between 30 and
100% of the full speed airflow depending on the controls
selection of the unit. The control changeover options are
two speed, floating building pressure sensing, and building
management control.
Includes a NEMA 3R disconnect switch to cut power to all
electrical components of the unit before servicing.
Non-fusible and fusible switches available. For fusible switches,
includes blades and fuse holders (fuses not included).
Provisions for Class “H” time delay fuses.
Circuit Analyzer
See Figure 28.1
Figure 28.1
14 Point Circuit Analyzer
Used to quickly assist service personnel in trouble shooting.
Monitors the unit firing sequence and vital operating steps.
Lights will come on as a point of operation is passed and
proven. If any light is not lit, that is the point where failure
occurred. Circuit analyzer is mounted on the door of the blower
section electrical compartment. There are 6, 10, and 14 point
analyzers available. Select circuit analyzer appropriate to the
number of points to be monitored. The following points are
available:
Point To Be Analyzed
24V Transformer Power
Door Switch
Smoke Detector
Freeze Protection
Fire Stat
Amplifier Power
Call For Heat
Air Flow Proving
Mild Temp Stat
Low Gas Pressure
High Gas Pressure
High Limit
Burner On
Low Stage Heat
High Stage Heat
Warm Up Stat
Dampers Open
Mod Supply Air
Dampers Opening
Dampers Closing
Blower On
Blower On (High)
Blower On (Low)
Evap On
Cool On
Required Control Device
None
Door Switch
Smoke Detector
Freeze Thermostat
Fire Stat
Electronic Modulation Controls
None
Air Flow Proving Switch
Mild Temp Thermostat
Low Gas Pressure Switch
High Gas Pressure Switch
None
None
Two-Stage Controls
Two-Stage Controls
Warm Up Thermostat
Two Position Dampers
Modulating Dampers
Floating Dampers
Floating Dampers
None
Two-Speed Motor
Two-Speed Motor
Evaporative Cooler
Control Relay
(Cooling Circuit By Others)
Factory Installed Dead Front Disconnect Switches
See Figures 28.2 and 28.3
Includes a disconnect switch that must be turned “off”
before entry to the electrical control cabinet can be obtained.
Switch can be manually overridden for purposes of servicing
the unit. Factory installed in the door of the blower electrical
compartment. Fusible and circuit breaker switches available.
For fusible switches, includes blades and fuse holders (fuses
not included). Provisions for Class “J” time delay fuses.
dead front
disconnect switch
14 point circuit
analyzer
Figure 28.3
Electrical Section Wiring
dead front
disconnect
switch
low voltage
terminal strip
two-speed
motor
starter
service
switches
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Dirty Filter
pressure switch
supply
power
terminal
strip
Figure 28.4
Blower Section
extended
grease
lines
adjustable
5 Hp
motor
two-speed filter
sheave
motor
rack
extended
grease
line zerk
fittings
1/4" perimeter
gasketed
blower
connection
convenience
outlet
blower door
safety switch
28
Figure 28.2
Electrical Section
bottom
supported
blower and
motor
direct drive
damper
actuator
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 29.1 - Factory and Field Installed
Type
Installation
Description
Room
Field
Honeywell T822D1008 - 1.0 amp @ 30 VAC; 55-95°F temperature range; heat anticipator
0.18 to 1.0 amp rating.
Room
Field
Robertshaw CM-260 - 1.5 amp @ 30 VAC; 45-75°F temperature range; heat anticipator 0.18
Single-stage
to 1.0 amp rating.
Thermostats
Sub-Base
Field
SB-3A-1 Sub-base for Robertshaw CM-260 thermostat - Sub-base switching: System-auto/off,
Fan - auto/on. (Requires Fan Delay Relay for duct furnaces.)
Room - FieldRobertshaw 300-225 7-day programmable thermostat. One heat and one cool stage; Fan
Programmable
On/Auto and Heat/Off/Cool/Auto System Switching; 2 to 4 events per day; Override feature;
Figure 29.1
One auxiliary output terminal.
Room w/Sub-Base
Field
Honeywell T874F1015 with Q674D1040 Sub-base - 25 VAC; 42-88°F temperature range;
(No Switching)
heat anticipator 0.1 to 1.2 amp rating.
Room w/ Sub-Base
Field
Honeywell T874F1015 with Q674C1009 Sub-base - 25 VAC; 42-88°F temperature range;
(With Switching)
heat anticipator 0.1 to 1.2 amp rating. Sub-base switching: System - auto/off, Fan - auto/on.
Room - Field
Robertshaw 300-229 7-day programmable thermostat. Two heat and two cool stages;
Programmable
Fan On/Auto and Heat/Off/Cool/Auto System Switching; 2 to 4 events per day; Override
Two-stage
feature; One auxiliary output terminal.
Thermostats Figure 29.1
Duct ①②
Factory or Field
Honeywell T678A1015 - 0-100°F temperature range; 20 foot capillary; 8 amp rating @ 120V.
Duct ①②
Factory or Field
Honeywell T678A1361 - 55-175°F temperature range; 20 foot capillary; 8 amp rating @ 120V.
Electronic
Modulating
Gas Control
Thermostats
Duct
Factory
Figure 29.3
Duct
Field
Figure 29.3
Duct
Factory
Figure 29.4
Duct Field
Figure 29.4
Set Point Adjuster
Field
Figure 29.4
Room Override
Field
Figure 29.4
Room - Figure 29.2
Field
Johnson Controls Electronic Temp Control with factory installed SET189A-600R Temp Sensor.
Shipped loose A350 temp selector and one (up to five) S350 Stage Adder.
Johnson Controls Electronic Temp Control with field installed SET189A-600R Temp Sensor,
A350 temp selector and one (up to five) S350 Stage Adder.
Maxitrol Discharge Air Sensor TS121 and Mixing Tube MT2R-12. Range 55-90°F. REQUIRES
THE ADDITION OF THE SET POINT ADJUSTER - Maxitrol TD121 (See below).
Maxitrol Discharge Air Sensor TS121 and Mixing Tube MT1R-12. Range 55-90°F. REQUIRES.
THE ADDITION OF THE SET POINT ADJUSTER - Maxitrol TD121 (See below).
Field Set Point Adjuster - Maxitrol TD 121 (For use with Maxitrol Duct Sensing System).
Can only be used with Maxitrol Duct Sensing System described above. Includes Maxitrol T115
room override stat. Temperature range 40-90°F.
Maxitrol Selectra-Stat T120. Temperature range 60-85°F.
① For non-cooling indoor gravity vented units, the thermostat is factory installed with sensing tube shipped on the side of the unit for field installation.
② One, two, or three duct stats can be used on Model Sizes 500-960 based on gas valve selection.
Figure 29.1
7-Day Programmable Thermostat
Figure 29.2
Maxitrol Selectra-stat
Figure 29.3
System 350 Components
Figure 29.4
Maxitrol Duct Sensing Components
T115
Override stat
MT2-12
TS-121
Mixing Tube and Sensor
TD-121
SET POINT ADJUSTER
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
29
Gas-Fired Indoor and Outdoor Duct Furnaces
Field Installed
Rainhood and Birdscreen (29)
(Outdoor only)
Used to prevent entry of rain into the fresh air opening of the
unit. Fully assembled and constructed of 20 gauge polyester
powder painted aluminized steel with internal baffles and a
meshed bird screen. Not for use with units with evaporative
coolers.
7-Day Electronic Programmable Time Clock
7-day/24-hour digital programmable time clock that features
7-day power-outage carryover of program and time of day
without the use of batteries. The control allows for simple and
inexpensive control of functions such as automatic temperature
setback (requires setback thermostat purchased separately),
reduction of outside air during periods when the building is not
occupied, and switching main supply fans from continuous to
intermittent operation.
As a 24-hour control, the same ON/OFF program is utilized
each day of the week, Saturday and/or Sunday, or any other
day may be skipped. When schedules vary from day to day, the
7-day programming capability allows for a different schedule
each day of the week, with up to 16 set points available.
Requires a 115V/1Ph power supply by others.
7-Day Econo-Timer
The 7 day push pin style appliance timer allows for simple and
inexpensive control of functions such as automatic temperature
setback (requires setback thermostat purchased separately),
reduction of outside air during periods when the building is not
occupied, and switching main supply fans from continuous to
intermittent operation. The time clock shall be mounted in a
suitable enclosure (by others) complying with the requirements
of all local codes and the NEC. The terminals of the time clock
are line voltage so the base must be located in a NEMA 1
enclosure (by others). Requires 115V/1Ph power supply by
others.
Smoke Detector
Low profile duct style photoelectronic smoke detector designed
to detect the presence of smoke in the duct. Once the smoke is
sensed, the smoke detector will de-energize the unit. Must be
installed indoors and duct velocity range must be between 500
to 4000 feet per minute. Double pole, double throw contacts,
manual reset. For duct widths of up to 1-1/2 feet. For greater
duct widths, smoke detector tube extensions are available for
up to 8 foot wide ducts.
Gas Pressure Regulator
Fisher Type S-100-, 3/4 inch pressure regulator for 5 to 10
psi inlet pressure capacity, 30 MBH to 400 MBH. Natural or
propane gas.
30
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Thermostat Guards
Clear plastic for room thermostats. Guard is locking type and
comes complete with two keys.
Summer/Winter Switch
Allows a choice of fan operation of the duct furnace/make-up
air unit, the summer/winter toggle switch kit is available for field
installation. In the summer position, the fan runs continuously
for ventilation and the heating circuit is disabled. In the winter
position for single-stage and two-stage gas control units,
the thermostat will cycle the fan and the heating circuit. In
the winter position for mechanical modulating and electronic
modulating gas control units, the fan runs continuously for
ventilation and the thermostat will cycle the heating circuit.
4' Extended Vent Kit (Outdoor only)
Gravity Vented Units
Includes the components required for the modification of the
standard combustion air/vent cap to allow the vent cap to be
approximately four feet above the unit. Includes the vent pipe,
vent cap, and secondary restrictor.
Power Exhausted Units
Includes the components required for the modification of the
standard vent discharge cover to allow the vent cap to be
approximately four feet above the unit. Includes the vent pipe,
vent cap, 90° elbow, exhaust collar, and strap clamp.
Remote Monitoring Panels
Used to control the operation of the make-up air unit. Standard
remote panels include 2 lights (Heat On and Blower On) and
a Summer/Off/Winter Switch. Custom remote panels are
available, see page 60.
Roof Curbs (Outdoor only)
16" high roof curb is constructed of 16 gauge galvanized steel
and designed to support the system units. The curb does not
extend to the optional evaporative cooler section. The roof curb
is shipped knocked down for field assembly and includes 1” x
4” nailer strips and curb gasket material. For flat roofs only and
available insulated or uninsulated.
Discharge Air Connections and/or Return Air
Connections (Outdoor only)
Used in conjunction with the roof curb, allows the discharge
and/or return air ductwork connections to be made before the
unit arrives at the job site.
Gas-Fired Indoor and Outdoor Duct Furnaces
“Heating Only” or “Heating and Recirculating” Operation
Method Heating Control Device
Gas Valve (Digit 12)
Air Control (Digits 20 & 21)
A
Single-stage Room
Thermostat
1-Single Stage
AA
B
Two-stage Room
Thermostat
2-Two Stage
AA
C
Wall-mounted
Selectra-stat
4, 7, or 8 - Electronic
Modulating
AA
Various control application methods are illustrated on this page
and on the following pages as guides to the types of systems
available and the components necessary to obtain the desired
control function. Under each application category, such as,
“Heating Only”, several methods of operation are described.
These methods are labeled as either “A”, “B”, “C”, etc. The
required components for a particular method of control are
labeled in each diagram with the appropriate corresponding
letter designation. As an example, under “Heating Only”, using
method “A”, single-stage control, the required components
would be: Single-Stage Heating Controls and a Single-Stage
Room Thermostat. Method “B” would use the components
labeled “B”. An operating description of each application
method is given beneath the appropriate illustration.
Method A Single-stage heating of a space requires a singlestage control system with a single-stage room thermostat. The
gas controls and blower motor are cycled each time the room
thermostat calls for heat and the burner is fired at full rated
input until the room temperature is satisfied. When the room
thermostat is satisfied, both the burner and the blower motor
are turned off.
Method B Two-stage heating of a space requires a two-stage
control and a two-stage room thermostat. The first stage of
burner fire and the blower motor are cycled by the first stage of
the room thermostat on a call for heat. If the room thermostat
cannot be satisfied by the low fire of the burner (50% firing rate)
and the room temperature continues to fall, the second stage
of the thermostat will activate the high fire or second stage of
the burner. The burner will then fire at 100% of full rated input.
When the second stage of the thermostat is satisfied, the
burner is again fired at 50% of rated input until the first stage of
the thermostat is satisfied. When both stages of the thermostat
are satisfied, both the burner and blower motor will be shut off.
Method C Electronic modulating for space heating requires
electronic modulating gas controls and a wall-mounted
modulating thermostat. Upon call for heat, the thermostat will
energize the modulating regulator and fire the burner at 40% of
full rated input. If the initial firing rate is not sufficient to satisfy
the room temperature, the modulating thermostat will increase
the rate of fire until the required room temperature is reached.
If the room temperature should exceed the thermostat set point
by as little as 1°F, the thermostat will shut off the burner and
blower motor.
NOTE: The heating and recirculating operation can be achieved using the same components as shown for “Heating Only”. The only
modification is that the blower motor is provided with constant power and runs continuously while the burner is cycled by the room
thermostat whenever heat is required.
NOTE: Outdoor unit shown for demonstration purposes only. The above control application applies to all system units.
NOTE: Any of these sequences can include the cooling coil section. Also, the evaporative cooling option can be included on the
units with outside air.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
31
Gas-Fired Indoor and Outdoor Duct Furnaces
“Heating and Recirculating with Minimum Outside Air” Operation
Method Heating Control Device
Gas Valve (Digit 12)
Air Control (Digits 20 & 21) ➀
A
Single-stage Room
Thermostat
1-Single Stage
FA, GC, or GD
B
Two-stage Room
Thermostat
2-Two Stage
FA, GC, or GD
C
Wall-mounted
Selectra-stat
4, 7, or 8 - Electronic
Modulating
FA, GC, or GD
Method A Single-stage heating and recirculating with minimum
outside air requires: 1) a single-stage control system; 2) a
single-stage room thermostat, and; 3) a set of fresh air dampers
with either a manual or automatic damper control. With this
method, the blower motor is provided with constant power and
runs continuously. The burner is cycled by the room thermostat
each time the thermostat calls for heat. Either a two-position or
modulating damper can be used with this system.
Method B Two-stage heating and recirculating with minimum
outside air requires: 1) a two-stage control system; 2) a twostage room thermostat, and; 3) a set of fresh air dampers with
either manual or automatic damper control. With this method,
the blower is provided with constant power and runs continuously. The burner is controlled by the two-stage thermostat and
fires at either 50% or 100% of full-rated input. Upon call for heat
from the first stage of the room thermostat, the burner is fired at
50% of rated input. If the room temperature continues to fall and
the set point of the second stage of the thermostat is reached,
the second stage of the burner is energized and the burner fires
at 100% of full-rated input. As the room temperature is satisfied,
the burner first returns to 50% fire and, if the temperature
reaches the set point of the first stage of the room thermostat,
the burner is turned off. Either a two-position or modulating
damper motor can be used with this system.
Method C Electronic modulation and air recirculation with
minimum outside air requires: 1) an electronic modulating
control system; 2) a modulating room thermostat, and; 3) a set
of fresh air dampers with manual or automatic control. With this
method, the blower is provided with constant power and runs
continuously. The burner is controlled by the modulating room
thermostat. Upon call for heat, the thermostat will energize
the gas modulating regulator and fire the burner at 40% of full
rated input. If the initial firing rate is not sufficient to maintain
the desired room temperature, the modulating thermostat will
increase the rate of burner fire until the thermostat set point is
reached. If the room temperature should exceed the thermostat
setting by as little as 1°F, the thermostat will shut off the burner.
Either a two-position or modulating damper motor can be used
with this system.
➀
If Air Control FA is used with the 2-position Damper Limiter option, the damper stroke is limited to the desired minimum outside air position at the factory and cannot
be changed. Power is supplied to the damper motor anytime the system is in operation. The damper motor drives the fresh air damper open to the predetermined
minimum position. If power is interrupted, the dampers will return to the closed position.
If Air Control GC or GD is used, then the minimum positioner is used to operate the damper motor. With the positioner it is possible to set the dampers to any desired
minimum outside-air open position. This position can be changed at any time by adjusting the positioner to another setting.
NOTE: Separated combustion unit shown for demonstration purposes only. The above control application applies to all system units.
NOTE: Any of these sequences can include the cooling coil section.
32
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
“Heating and Recirculating with Minimum Outside Air and
Mixed Air Temperature Control” Operation
FACTORY INSTALLED
MINIMUM POSITIONER
COOLING
COIL
SECTION
DUCT FURNACE
SECTION
BLOWER
SECTION
ELECTRICAL
SECTION
DOWNTURN
SECTION
FRESH
AIR DAMPER
FRESH
AIR
A350 P
VOLTS
2
4
6
8
10
ON
4
8
12 16 25
MILLIAMPS
JOHNSON
CONTROLS
PROPORTIONAL
TEMPERATURE
CONTROLLER
DISCHARGE AIR
Method Heating Control Device
RETURN
AIR DAMPER
RETURN AIR
Gas Valve (Digit 12)
Air Control (Digits 20 & 21)
A
Single-stage Room
Thermostat
1-Single Stage
GG or GH
B
Two-stage Room
Thermostat
2-Two Stage
GG or GH
C
Wall-mounted
Selectra-stat
4, 7, or 8 - Electronic
Modulating
GG or GH
Method A Single-stage heating and recirculating with minimum
outside air and mixed air temperature requires: 1) a single-stage
control system; 2) a single-stage room thermostat; 3) a minimum
positioner for minimum outside air setting of dampers; 4) fresh and return-air modulating dampers, and; 5) a mixed-air temperature
controller. With this method the blower motor is provided with
constant power and the blower runs continuously. The burner is
cycled by the room thermostat each time the thermostat calls for
heat. The minimum positioner is used to set the minimum outside
air damper position and can be adjusted to provide different levels
of minimum outside air depending upon the requirements of the
space being heated. The proportional temperature controller,
located in the blower section of the outdoor make-up air unit,
senses the mixed temperature of the fresh and return air and
modulates the fresh- and return-air dampers to maintain a preset
mixed air temperature.
Method B Two-stage heating and recirculating with minimum
outside air and mixed-air temperature control requires: 1) a
two-stage control system; 2) a two-stage room thermostat; 3) a
minimum positioner for minimum outside air setting of dampers;
4) fresh- and return-air modulating dampers, and; 5) a mixed-air
temperature controller. With this method, the blower is provided with
constant power and runs continuously. The burner is controlled by
the two-stage room thermostat and fires the burner at either 50%
or 100% of full-rated input. On a call for heat from the first stage
of the thermostat, the burner is fired at 50% of rated input. If the
room temperature continues to fall and the set point of the second
stage of the thermostat is reached, the second stage of the burner
is energized and the burner fires at 100% of full-rated input. As
the room temperature is satisfied, the burner first returns to 50%
fire and, as the temperature reaches the set point of the first stage
of the room thermostat, the burner is turned off. The minimum
positioner can be adjusted to provide different levels of minimum
outside air depending upon the requirements of the space being
heated. The proportional temperature controllers, located in the
blower section of the outdoor make-up air unit, senses the mixed
temperature of the fresh and return air and modulates the freshand return-air dampers to maintain a preset mixed air temperature.
Method C Electronic modulation and air recirculation with
minimum outside air and mixed air temperature control requires:
1) an electronic modulating control system; 2) a modulating room
thermostat; 3) a minimum positioner for minimum outside air
settings of dampers; 4) fresh- and return-air modulating dampers,
and; 5) a mixed-air temperature controller. With this method, the
blower is provided with constant power and runs continuously. The
burner is controlled by the modulating room thermostat. Upon call
for heat, the thermostat will energize the gas modulating regulator
and fire the burner at 40% of full rated input. If the initial firing rate
is not sufficient to maintain the desired room temperature, the
modulating thermostat will increase the rate of burner fire until the
thermostat set point is reached. If the room temperature should
exceed the thermostat setting by as little as 1°F, the thermostat
will shut off the burner. The minimum positioner can be adjusted
to provide different levels of minimum outside air depending on
the requirements of the space being heated. The proportional
temperature controller located in the blower section of the outdoor
make-up air unit, senses the mixed temperature of the fresh and
return air and modulates the fresh- and return-air dampers to
maintain a preset mixed air temperature.
NOTE: Outdoor unit shown for demonstration purposes only. The above control application applies to all system units.
NOTE: Any of these sequences can include the cooling coil section. Also, the evaporative cooling option can be included on the
units with outside air.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
33
Gas-Fired Indoor and Outdoor Duct Furnaces
“Heating and Recirculating with Space Pressure Sensing Control” Operation
Method Heating Control Device
A
B
Gas Valve (Digit 12)
Air Control (Digits 20 & 21)
2-Two Stage
HP
Two-stage Duct &
Two-stage Room Stat
Maxitrol Duct Sensing
System with Room Override
4, 7, or 8 - Electronic
Modulating
Method A Two stage heating and recirculating with space
pressure sensing requires: 1) a two stage control system; 2)
a two stage duct thermostat; 3) two stage room thermostat; 4)
fresh and return air dampers; 5) a floating damper actuator;
6) a space pressure sensor with outside air pick-up tube. With
this method the blower motor is provided with constant power
and the blower runs continuously. The burner is controlled by
either the two stage duct thermostat or the two stage room
thermostat and fires the burner at either 50% or 100% of the
full rated input. The duct thermostat fires the burner to maintain
the desired discharge air temperature and the room thermostat
fires the burner to maintain the desired room temperature.
On a call for heat from the first stage of either thermostat,
the burner is fired at 50% of the rated input. If the discharge
or room temperature continues to fall and the set point of the
second stage of the thermostat is reached, the second stage of
the burner is energized and the burner fires at 100% of the full
rated input. As the discharge or room temperature is satisfied,
the burner first returns to 50% fire and as the temperature
reaches the set point of the first stage of the thermostat,
the burner is turned off. The space pressure sensor controls
the damper position by measuring the differential between
the outside air pressure and the space pressure. The space
pressure can be adjusted to keep a positive space pressure
between 0 and 0.25” W.C. When the space pressure is above
the desired set point, the fresh air damper starts to close and
the return air damper opens to bring in less outside air since
the space pressure is getting to high. When the space pressure
is below the desired set point, the fresh air damper opens to
bring in more outside air. When the unit is shut off, the fresh air
damper is driven closed.
HP
Method B Electronic modulation heating and recirculating
with space pressure sensing requires: 1) an electronic
modulating control system; 2) a modulating duct thermostat; 3)
a room override thermostat; 4) fresh and return air dampers;
5) a floating damper actuator; 6) a space pressure sensor
with outside air pick-up tube. With this method the blower
motor is provided with constant power and the blower runs
continuously. The burner is controlled by either the modulating
duct thermostat or the single stage room override thermostat.
The duct thermostat fires the burner to maintain the desired
discharge air temperature and the room override thermostat
fires the burner to maintain the desired room temperature.
On a call for heat from the duct thermostat, the duct thermostat
will energize the gas controls and fire the burner at 40% of the
full rated input. If the initial firing rate is not sufficient to maintain
the desired discharge temperature, the modulating thermostat
will increase the rate of burner fire until the thermostat set point
is reached. If the discharge temperature should exceed the
duct thermostat setting by as little as 1°F, the thermostat will
shut off the burner. On a call for heat from the room override
thermostat, the room override thermostat provides full fire
operation until the room temperature is satisfied. The space
pressure sensor controls the damper position by measuring
the differential between the outside air pressure and the space
pressure. The space pressure can be adjusted to keep a
positive space pressure between 0 and 0.25” W.C. When the
space pressure is above the desired set point, the fresh air
damper starts to close and the return air damper opens to bring
in less outside air since the space pressure is getting to high.
When the space pressure is below the desired set point, the
fresh air damper opens to bring in more outside air. When the
unit is shut off, the fresh air damper is driven closed.
NOTE: Separated Combustion unit shown for demonstration purposes only. The above control application applies to all system units.
NOTE: Any of these sequences can include the cooling coil section.
34
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
“100% Make-up Air” Operation
DOWNTURN
SECTION
COOLING
COIL
SECTION
DUCT FURNACE
SECTION
ELECTRICAL
SECTION
BLOWER SECTION
FRESH
AIR DAMPER
FRESH
AIR
DISCHARGE AIR
Method Heating Control Device
A
Two-stage Duct
Thermostat
B
➀
C
Maxitrol Duct
Sensing System
Gas Valve (Digit 12)
Air Control (Digits 20 & 21)
2-Two Stage
DA
3-Mechanical
Modulation
DA
4, 7, or 8 - Electronic
Modulating
DA
Method A Two-stage make-up air systems require: 1) a twostage control system; 2) a two-stage duct stat, and; 3) a set of
fresh air dampers. With this method of make-up air, the blower
motor is provided with constant power anytime the system is
on and the blower runs continuously. The burner is controlled
by a two-stage duct stat which senses discharge air from the
unit. The burner is fired at 50% and 100% of full-rated input,
depending on the demand from the two-stage duct stat. The
first stage of fire is at 50% of rated input. If this is not sufficient
to maintain the desired discharge temperature, the second
stage of the burner is energized by the second stage of the
duct stat to achieve 100% fire. The fresh air damper is of the
two-position type, either open or closed. It is always open
whenever power is supplied to the make-up air unit. If power is
interrupted, the damper will return to the closed position.
Method B Mechanical modulating make-up air systems require
a mechanical modulating control system and a set of fresh air
dampers. The mechanical modulating control system includes a
hydraulic-type duct sensing bulb which controls the modulating
gas valve. (This system cannot be used with an override
feature.) With this method, the sensing bulb of the mechanical
modulating valve is placed in the discharge air stream to
sense the discharge air temperature. If the air temperature is
lower than the set point of the modulating valve and control,
the sensing bulb will open the gas valve and allow 40% fire.
If this is not sufficient to achieve the desired temperature, the
modulating valve will then continue to open and allow firing
rates between 50% and 100% of full-rated input until the
discharge air temperature is satisfied. The fresh air damper is
of the two-position type, either open or closed. It is always open
whenever power is supplied to the make-up air unit. If power is
interrupted, the damper will return to the closed position. The
blower also runs continuously as long as power is supplied to
the make-up air unit.
Method C Electronic modulating make-up air systems require
an electronic modulating control system, a duct sensing system,
and a set of fresh air dampers. With this system, the sensing
probe of the duct sensing system is placed in the discharge air
stream to sense the discharge air temperature. If the discharge
air temperature is lower than the set point of the modulatingregulator valve, the sensing probe will send a signal to the
modulating valve and low fire will begin. Low fire is 40% of
full-rated input. If this firing rate is not sufficient to achieve the
desired temperature, the valve will continue to open and allow
firing rates between 40% and 100% of full-rated input until the
discharge air temperature is satisfied. The fresh air damper is
of the two-position type, either open or closed. It is always open
whenever power is supplied to the make-up air unit. If power is
interrupted, the damper will return to the closed position. The
blower also runs continuously as long as power is supplied to
the make-up air unit. This system can be used with an override
thermostat.
➀ With mechanical modulating systems, the discharge air temperature sensing bulb is an integral part of the modulating gas valve. See description of Method B.
NOTE: Outdoor unit shown for demonstration purposes only. The above control application applies to all system units.
NOTE: Any of these sequences can include the cooling coil section. Also, the evaporative cooling option can be included on the
units with outside air.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
35
Gas-Fired Indoor and Outdoor Duct Furnaces
Selection Procedure
Selection Example Conditions
In order to properly select an indirect-fired heating, ventilating,
cooling or make-up air unit, it is necessary to have the following
basic information.
In the following example, a outdoor unit is used for
demonstration purposes. Use same procedure for all indoor
units.
Select an indirect-fired, 100% make-up air unit to meet the
following conditions:
1. CFM at sea level = 5,000 cfm
2. Outdoor design temp. = 10°F
Indoor design temp. = 70°F
3. Heating output capacity =
5000 cfm x (70°F -10°F) x 1.08 = 324,000 Btu/Hr
4. External Static Pressure = 0.65
5. The Gravity Vented unit with the controls on the Right Hand
Side is to be provided with the following:
2” Permanent Filters, a Rainhood with Fresh Air Damper,
and a Downturn
6. Heat exchanger and burner = 409 Stainless Steel
7. Gas Type = Natural
8. Gas Controls = Electronic Modulating with Duct Sensing
9. Supply Voltage: 460V/60Hz/3Ph
10. Altitude: 1000 feet
With the information listed above, the basic model, using the
Model Nomenclature shown on page 75, can be selected as
shown in the following example:
1.
Required air handling capacity (CFM).
The air capacity of the unit is usually determined by the
ventilation air requirements, exhaust load of the building,
infiltration losses, or the air turns/changes of the space.
2. Outdoor and indoor design temperature.
The outdoor design temperature is determined by using
the ASHRAE Guide design temperatures for the city where
the equipment is to be installed. For heating and ventilating
units, the desired room temperature would be used as the
indoor design temperature. In the case of 100% make-up
air units, the discharge air temperature should be at least
equal to the temperature of the air being exhausted.
3. Required heating output capacity (Btu/Hr).
The heating output capacity of the unit is determined by
using the formula:
BTU/HR = CFM x Temp. Rise (°F) x 1.08
4. External static pressure to unit.
The external static pressure (E.S.P.) is determined using
the ASHRAE Guide for duct losses, or may be provided by
the design engineer.
5. Unit configuration with options and accessories
(Rainhood, filters, dampers, or evaporative cooler).
The unit configuration is determined by the location
where the unit is to be installed. The critical options and
accessories are those that add internal static pressure
(I.S.P.) to the unit. Once these items are determined, the
pressure drop curves would be used to calculate the total
pressure drop (T.S.P.)
Total Static Pressure = Internal + External Static Pressure
6. Heat exchanger material.
The heat exchanger type is determined by the application.
The standard heat exchanger material is aluminized
steel. A 409 stainless steel heat exchanger and burner is
recommended when the unit is installed downstream of a
cooling coil or evaporative cooler, and when the combined
entering/return air to the unit is below 40°F.
7. Type of fuel.
Either natural or propane gas determined by the design
engineer.
8. Gas control staging method.
Either single stage, two stage, mechanical modulation, or
electronic modulation determined by the design engineer.
9. Main power supply voltage to unit.
10. Altitude at which unit is to be installed.
With this information a basic unit can be selected as shown in
the following example.
36
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
1. Determine the Model Configuration and Venting:
The Model Configuration is determined by the required
sections of the unit (Blower and Downturn) and the venting
style (Gravity) that are obtained from item #5. Using the
Model Nomenclature on page 75 the Model Configuration
and Venting = ODG.
2. Determine the Furnace Input Rating (MBH):
Using the Heating output capacity, the Furnace Input
Rating is determined from Table 19.1. The closest model
to 324,000 Btu/Hr output has an Btu/Hr Input rating of
400,000 Btu/Hr so the Furnace Input Rating = 400.
3. Determine the Heat Exchanger/Burner/Drip Pan
Material:
From item #2 listed above, the Heat Exchanger and Burner
required are 409 Stainless Steel. Because the Drip Pan
material is not specified, the standard Aluminized Steel drip
pan will be used. Thus, the Heat Exchanger/Burner/Drip
Pan Material = S.
4. Determine the Development Sequence:
From item #8 listed above, the modulating gas controls
result in the Development Sequence = M.
5. Determine the Access Side:
From item #5 listed above, the Right Hand Gas controls
result in the Access Side = R.
6. Determine the Air Temperature Rise:
From item #2 listed above, the Air Temperature Rise is
60°F (70°F - 10°F). However, using the output capacity of
the ODG400 @ 5000 cfm, the resulting temperature rise is
59.3°F (320,000/(5000 x 1.08)). Since the rise is less than
60°F, the Air Temperature Rise = L.
7. Determine the Gas Type:
From item #7 listed above, the Natural Gas results in the
Gas Type = N.
8. Determine the Gas Valve:
From item #8 listed above, the Electronic Modulating with
Duct Sensing results in the Gas Valve = 4.
9. Determine the Additional Safety Switches:
Since no additional safety switches were specified, the
Additional Safety Switches = 0.
Gas-Fired Indoor and Outdoor Duct Furnaces
10. Determine the Supply Voltage:
From item #9 listed above, the 460V/60Hz/3Ph results in
the Supply Voltage = F.
11. Determine the Transformer:
Using Table 22.1 with the selected Unit Type = ODG, the
Transformer = 2.
12. Determine the Blower Size and Bearing Type:
Using Table 18.1, the Model Size 400 has three available
blowers for which the performance tables are shown on
pages 39-41. Since all of the blower performance tables
can provide the required 5000 cfm, the total static pressure
for each blower performance curve must be determined.
A) The Pressure Drop of an option or accessory is
determined by entering the right of the table at the
desired cfm and reading across the table until the cfm
intersects the desired item. For this example, in table
38.1 the 2” Permanent Filter is used. At the point of
intersection, read across the table to the right and read
the pressure drop, in inches of water column for the
filters. For this example, the pressure drop is 0.06” W.C.
This method is used to determine the pressure drop for
the other options and accessories. As a result:
For the Model Size 400 with Digit 16 = E,F,G, or H:
2” Permanent Filters:
0.06” W.C.
Rainhood:
0.11” W.C.
Downturn:
0.07” W.C.
Internal Static Pressure Drops
0.24” W.C.
The Total Static Pressure for the system is determined by
Internal Static + External Static = Total Static Pressure
For this example 0.24” + 0.65” = 0.89” W.C. T.S.P.
From page 38,
for the Model Size 400 with Digit
2” Permanent Filters:
Rainhood:
Downturn:
Internal Static Pressure Drops
The Total Static Pressure for the system is determined by
Internal Static + External Static = Total Static Pressure
For this example 0.22” + 0.65” = 0.87” W.C. T.S.P.
16 = I, J, or K:
0.04” W.C.
0.11” W.C.
0.07” W.C.
0.22” W.C.
B) Using the total static pressure (T.S.P.) calculated in step
12a, use blower performance tables for the Model Size
400 (Tables 40.1).
Using table 40.1, enter the table at the required 5000
cfm for E.F. blowers, and follow the cfm line to the
right until it intersects with the T.S.P. line of 0.75” W.C.
which is shown at the top of the table. At the point of
intersection of these two columns, read the required
horsepower and blower rpm. Repeat this process for
1.00” T.S.P and iterate to determine the BHP and rpm
for 0.89” W.C. For this example the horsepower is 5 and
the blower rpm is 1280.
important
When selecting the required motor horsepower, the
horsepower must always be read off the curve to the right of
the data point determined from the intersection point of the
cfm and T.S.P. lines.
Following this procedure for G,H blowers (Using 5000
cfm and 0.89” W.C. T.S.P), the horsepower is 5 hp and
920 rpm. Following this procedure for I,J,H blowers
(Using 5000 cfm and 0.87” W.C. T.S.P), the horsepower
is 3 hp and 700 rpm. Although I,J,H blowers results in a
3 hp motor, this blower requires the use of the extended
cabinet length. As a result, for purposes of this selection
example G,H blowers will be used.
Since the Bearing Type was not specified, the standard
spider bearings will be used. Thus, using Table 40.1 with
spider bearings, the Blower Size and Bearing Type = G.
13. Determine the Motor Horsepower:
The motor horsepower determined in step 12 was a 3 Hp.
Since the supply voltage is 460V/60Hz/3Ph, a motor starter
will need to be provided either with the unit or by others.
For purposes of this selection, a motor starter by others will
be used so the Motor Horsepower = G.
14. Determine the Motor Type:
The motor type was not specified so for purposes of this
selection the standard open drip proof motor will be used
so the Motor Type = 1.
15. Determine the Sheave Arrangement:
To establish the Sheave Arrangement, the motor frame size
must be determined. The Motor Data tables on pages 44 to
48 contain the motor frame size.
A) Using the Supply Voltage (460V/60Hz/3Ph), enter the
correct Motor Data table (Table 47.1). Using Model
Nomenclature Digits 17 and 18 (G1) determined in steps
13 and 14, find the motor frame size (182T).
B) Using the Motor Frame Size enter the Sheave Selection
table for the selected blower determined by step 13
(Table 42.4). Using the rpm calculated in step 12 (920
rpm), select the sheave range that contains the required
rpm. Find the intersection with the Motor Frame Size to
determine the Sheave Selection. For this example with a
182T frame with 920 rpm, from Table 42.4, the Sheave
Arrangement = I.
16. Determine the Air Control:
The Air Control option is selected based on the required
damper configuration. The available damper selections are
detailed on pages 23 through 25. For this selection, a 100%
fresh air unit without return air was required so the Air
Control = DA.
17. Determine the Evaporative Cooler:
An evaporative cooler was not specified so for purposes of
this selection the Evaporative Cooler = 0.
18. Determine the Cooling Coil:
A cooling coil cabinet was not specified so for purposes of
this selection the Cooling Coil = 0.
Based on the previous steps, the model number for the base
unit is the following:
ODG400SMRLN40F2GG1IDA00
Once the basic model has been determined, the additional
options and accessories outlined on page 26 to 30 can be
added to the unit.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
37
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 38.1 - Option & Accessory Pressure Drop Tables (in ''W.C.) ①➁
100/125
C,D,E,F
150/175
C,D,E,F
200/225
C,D,E,F,G,H
E,F,G,H
250/300
500/600
I,J,K,L
E,F,G,H
350/400
700/800
840/960
I,J,K,L
38
0.00
0.00
0.01
0.01
0.02
0.03
0.04
0.05
0.06
0.08
0.12
0.00
0.01
0.02
0.04
0.07
0.11
0.15
0.19
0.25
0.26
0.02
0.02
0.04
0.05
0.07
0.10
0.13
0.17
0.21
0.23
0.26
0.02
0.03
0.04
0.06
0.09
0.11
0.14
0.18
0.21
0.26
0.30
0.02
0.02
0.03
0.04
0.06
0.08
0.10
0.15
0.21
0.27
0.02
0.04
0.08
0.12
0.18
0.25
0.33
0.42
0.57
0.66
0.02
0.03
0.04
0.05
0.06
0.07
0.09
0.10
0.12
0.14
0.02
0.03
0.05
0.07
0.10
0.14
0.19
0.24
0.30
0.36
0.43
0.51
0.01
0.01
0.02
0.03
0.03
0.04
0.06
0.07
0.08
0.11
0.15
0.03
0.05
0.07
0.10
0.13
0.16
0.19
0.22
0.25
0.26
0.02
0.03
0.05
0.08
0.10
0.14
0.18
0.22
0.27
0.29
0.33
0.03
0.05
0.08
0.10
0.14
0.18
0.22
0.27
0.32
0.38
0.45
0.07
0.08
0.09
0.12
0.14
0.16
0.19
0.25
0.31
0.37
0.07
0.12
0.16
0.22
0.28
0.35
0.42
0.51
0.64
0.71
0.03
0.04
0.05
0.07
0.09
0.11
0.14
0.17
0.20
0.23
0.03
0.04
0.07
0.11
0.17
0.23
0.30
0.38
0.48
0.58
0.69
0.81
Discharge
Damper
Evap Cooler
12'' Media
w/Prefilter
Evap Cooler
12'' Media
Evap Cooler
6'' Media
w/Prefilter
0.03
0.01
0.05
0.02
0.07
0.03
0.01
0.05
0.02
0.07
0.04
0.02
0.08
0.04
0.12
0.05
0.03
0.11
0.06
0.17
0.06
0.04
0.14
0.08
0.22
0.07
0.06
0.17
0.11
0.29
0.09
0.08
0.21
0.15
0.36
0.10
0.10
0.25
0.19
0.44
0.11
0.12
0.30
0.23
0.53
0.13
0.16
0.37
0.31
0.68
0.16
0.23
0.51
0.45
0.96
0.02
0.01
0.06
0.02
0.08
0.04
0.02
0.08
0.04
0.12
0.07
0.04
0.14
0.08
0.23
0.10
0.08
0.21
0.15
0.36
0.14
0.12
0.30
0.23
0.53
0.19
0.17
0.40
0.34
0.73
0.24
0.23
0.51
0.46
0.97
0.30
0.30
0.63
0.60
1.23
0.374000 Max CFM for Evap
4000 Max CFM for Evap
0.39
0.04
0.01
0.07
0.03
0.09
0.05
0.03
0.10
0.05
0.15
0.08
0.04
0.15
0.09
0.24
0.11
0.07
0.20
0.14
0.34
0.15
0.10
0.27
0.20
0.46
0.18
0.14
0.34
0.27
0.61
0.23
0.18
0.41
0.35
0.77
0.27
0.23
0.50
0.45
0.95
0.32
0.28
0.59
0.55
1.15
0.34
0.30
0.63
0.60
1.23
0.385200 Max CFM for Evap
0.03
0.02
0.08
0.04
0.12
0.04
0.03
0.12
0.07
0.19
0.06
0.05
0.17
0.10
0.27
0.08
0.08
0.22
0.15
0.36
0.10
0.10
0.27
0.20
0.47
0.12
0.13
0.33
0.27
0.60
0.15
0.17
0.40
0.34
0.73
0.18
0.21
0.47
0.42
0.89
0.21
0.25
0.55
0.50
1.05
0.25
0.30
0.63
0.60
1.23
0.286000 Max CFM for Evap
0.05
0.02
0.10
0.05
0.15
0.06
0.03
0.11
0.06
0.17
0.09
0.04
0.15
0.09
0.24
0.11
0.06
0.19
0.13
0.32
0.15
0.09
0.24
0.17
0.41
0.18
0.11
0.29
0.23
0.52
0.22
0.15
0.35
0.29
0.64
0.31
0.22
0.48
0.43
0.91
0.42
0.30
0.63
0.60
1.23
0.516500 Max CFM for Evap
0.03
0.01
0.05
0.02
0.08
0.05
0.03
0.10
0.05
0.15
0.09
0.04
0.15
0.09
0.23
0.12
0.07
0.20
0.14
0.34
0.16
0.10
0.26
0.20
0.46
0.21
0.14
0.34
0.27
0.61
0.27
0.18
0.41
0.35
0.77
0.33
0.23
0.50
0.45
0.95
0.42
0.30
0.64
0.60
1.23
0.4710400 Max CFM for Evap
0.04
0.03
0.10
0.05
0.16
0.05
0.04
0.13
0.07
0.20
0.06
0.05
0.16
0.10
0.25
0.08
0.06
0.19
0.13
0.32
0.10
0.08
0.23
0.16
0.39
0.12
0.10
0.27
0.20
0.47
0.14
0.12
0.31
0.24
0.55
0.17
0.15
0.36
0.29
0.64
0.19
0.17
0.40
0.34
0.74
0.22
0.20
0.45
0.39
0.85
0.02
0.02
0.08
0.03
0.11
0.03
0.02
0.09
0.04
0.14
0.04
0.04
0.14
0.08
0.22
0.06
0.06
0.19
0.12
0.31
0.08
0.09
0.25
0.18
0.42
0.11
0.12
0.31
0.24
0.55
0.13
0.16
0.38
0.32
0.70
0.16
0.20
0.46
0.40
0.86
0.19
0.25
0.54
0.50
1.04
0.23
0.31
0.64
0.61
1.24
0.27
11050 Max CFM for Evap
0.31
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual AIR5-173.5
Evap Cooler
6'' Media
0.02
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.10
0.11
0.15
0.02
0.03
0.05
0.07
0.10
0.13
0.16
0.20
0.25
0.26
0.03
0.04
0.06
0.09
0.11
0.14
0.18
0.21
0.25
0.27
0.30
0.03
0.04
0.05
0.07
0.09
0.11
0.13
0.16
0.19
0.22
0.25
0.05
0.05
0.07
0.10
0.12
0.15
0.18
0.25
0.34
0.41
0.03
0.05
0.08
0.11
0.15
0.19
0.24
0.30
0.38
0.43
0.04
0.05
0.06
0.07
0.09
0.10
0.12
0.14
0.16
0.18
0.02
0.02
0.04
0.05
0.07
0.10
0.12
0.15
0.18
0.22
0.26
0.30
2'' Farr 30/30
Filters
0.01
0.01
0.01
0.02
0.02
0.03
0.04
0.04
0.05
0.07
0.09
0.02
0.02
0.04
0.06
0.08
0.11
0.13
0.16
0.20
0.21
0.02
0.03
0.04
0.06
0.08
0.11
0.13
0.16
0.19
0.21
0.23
0.02
0.02
0.04
0.05
0.06
0.08
0.10
0.11
0.14
0.16
0.18
0.02
0.03
0.04
0.06
0.08
0.10
0.13
0.19
0.26
0.32
0.01
0.03
0.05
0.08
0.11
0.15
0.20
0.25
0.33
0.38
0.02
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.10
0.11
0.01
0.02
0.03
0.04
0.05
0.07
0.09
0.12
0.14
0.17
0.20
0.24
Rainhood and
Birdscreen
A,B,C,D
0.01
0.01
0.02
0.02
0.03
0.03
0.04
0.04
0.05
0.06
0.08
0.01
0.02
0.03
0.05
0.07
0.09
0.11
0.14
0.17
0.17
0.01
0.02
0.03
0.05
0.06
0.08
0.11
0.13
0.16
0.17
0.19
0.01
0.01
0.02
0.03
0.03
0.05
0.06
0.07
0.09
0.11
0.13
0.03
0.03
0.04
0.05
0.07
0.08
0.10
0.14
0.19
0.23
0.02
0.03
0.05
0.08
0.11
0.15
0.19
0.24
0.32
0.36
0.02
0.02
0.03
0.03
0.04
0.05
0.06
0.06
0.07
0.08
0.02
0.02
0.03
0.04
0.06
0.07
0.09
0.11
0.13
0.15
0.18
0.20
Weatherproof Unit Only
Downturn
Plenum
75
CFM
556
600
800
1000
1200
1400
1600
1800
2000
2300
2778
741
1000
1500
2000
2500
3000
3500
4000
4500
4630
1111
1500
2000
2500
3000
3500
4000
4500
5000
5200
5556
1481
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
1852
2000
2500
3000
3500
4000
4500
5500
6500
7250
1925
3000
4000
5000
6000
7000
8000
9000
10400
11111
2593
3000
3500
4000
4500
5000
5500
6000
6500
7000
2593
3000
4000
5000
6000
7000
8000
9000
10000
11050
12000
13000
2'' Farr
Aeropleat
Filters
Digit 16
2'' Permanent
Filters
Unit Size
All Units
1'' Permanent
Filters
0.00
0.01
0.01
0.01
0.01
0.02
0.02
0.03
0.03
0.04
0.06
0.01
0.01
0.02
0.03
0.04
0.05
0.07
0.09
0.11
0.11
0.01
0.01
0.02
0.02
0.04
0.05
0.06
0.08
0.10
0.11
0.13
0.01
0.01
0.02
0.04
0.05
0.06
0.08
0.10
0.12
0.14
0.16
0.02
0.02
0.03
0.04
0.06
0.07
0.09
0.13
0.18
0.23
0.02
0.04
0.07
0.11
0.16
0.21
0.28
0.35
0.47
0.53
0.01
0.01
0.01
0.01
0.02
0.02
0.03
0.04
0.04
0.05
0.01
0.01
0.01
0.02
0.04
0.05
0.08
0.10
0.14
0.17
0.21
0.26
① Accessory / Option
static pressure losses
are approximate values
only. Please consult
the Accuspec selection
software for static
pressure losses at other
than listed CFM.
➁ For units with a
cooling coil cabinet, the
coil static pressure must
be added to the Total
Static Pressure for motor
horsepower selection.
Refer to page 64-67 for
factory installed cooling
coil static pressure
drops.
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 39.1 - Unit Performance Tables
Digit Unit Size16
①②
.
Total Static Pressure, ''W.C.
Air
0.25
0.50
0.751.001.251.502.002.503.00
Temp.
Rise CFM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM
871
0.22 1031 0.29 1170 0.37 1296 0.45 1411
0.63 1617
0.81 1800 1.01 1968
75
A,B 100°F / - 556 0.09 679 0.15
924
0.29 1074 0.37 1206 0.46 1327 0.55 1438
0.75 1638
0.95 1818 1.17 1982
79°F / - 700 0.14 747 0.21
966
0.35 1109 0.44 1237 0.54 1354 0.64 1462
0.84 1658
1.06 1832 1.30 1996
69°F / - 800 0.18 801 0.26
1.07 1709
1.32 1879
-
56°F / - 1000 0.29 917 0.39 1062 0.50 1192 0.60 1310 0.72 1419 0.83 1522
1.35 1773
-
-
-
46°F / - 1200 0.45 1042 0.57 1171 0.69 1289 0.82 1397 0.94 1499 1.08 1595
-
-
-
-
-
40°F / - 1400 0.66 1173 0.80 1288 0.94 1395 1.08 1495 1.23 1589 1.38 1680
-
-
-
-
-
-
-
-
-
35°F / - 1600 0.93 1308 1.09 1412 1.25 1509 1.42 1601
-
-
-
-
-
-
-
-
-
-
-
-
-
31°F / - 1800 1.28 1445 1.46 1539
C,D 69°F / - 800
-
-
0.15
795
0.21
960
-
-
-
-
-
-
-
-
-
-
-
75
-
-
0.20
822
0.28
975
0.36 1112
-
-
-
-
-
-
-
-
-
56°F / - 1000
862
0.35 1003 0.44 1131 0.54 1250 0.65 1361
-
-
-
-
-
46°F / - 1200 0.19 705 0.27
0.45 1041 0.55 1161 0.66 1273 0.77 1377
1.00 1572
-
-
-
40°F / - 1400 0.27 770 36.00 912
968
0.57 1087 0.68 1199 0.80 1304 0.92 1403
1.17 1589
1.44 1760 1.72 1920
35°F / - 1600 0.37 839 0.47
1.36 1613
1.65 1777 1.94 1931
31°F / - 1800 0.49 912 0.60 1030 0.72 1139 0.84 1244 0.96 1343 1.09 1437
1.59 1645
1.89 1802 2.20 1950
28°F / - 2000 0.65 987 0.77 1095 0.90 1197 1.03 1295 1.16 1388 1.30 1477
1.98 1703
2.31 1850 2.65 1990
24°F / - 2300 0.94 1104 1.08 1200 1.22 1292 1.37 1380 1.52 1465 1.67 1547
2.80 1818
-
-
-
20°F / - 2778 1.59 1296 1.75 1377 1.92 1456 2.09 1532 2.26 1606 2.44 1679
-
-
0.15
808
0.23
962
0.30 1093 0.38 1212 0.47 1320
0.60 1514
0.86 1686 1.07 1840
100/125 C,D 100°F / - 741
Start 125
846
0.29
993
0.38 1121 0.47 1236 0.56 1342
0.77 1532
0.99 1702 1.22 1856
80°F/100°F 926 0.13 670 0.21
916
0.41 1052 0.52 1173 0.62 1282 0.74 1384
0.97 1568
1.22 1733 1.48 1884
62°F/77°F 1200 0.22 758 0.31
975
0.53 1103 0.64 1218 0.76 1323 0.89 1422
1.15 1600
1.42 1762 1.70 1910
53°F/66°F 1400 0.30 828 0.41
1.58 1681
1.90 1834 2.23 1976
41°F/51°F 1800 0.55 982 0.69 1108 0.83 1220 0.98 1325 1.12 1422 1.27 1513
2.15 1778
2.52 1923 2.90 2057
34°F/42°F 2200 0.93 1145 1.10 1254 1.27 1354 1.44 1449 1.61 1537 1.79 1621
1.35 1638
-
-
-
28°F/36°F 2600 1.45 1315 1.65 1410 1.85 1500 2.05 1585 2.25 1666 2.46 1744
-
-
-
-
-
-
-
-
-
25°F/31°F 3000 2.16 1489 2.39 1573 2.61 1654 2.84 1731
100/125 E,F 41°F/51°F 1800 0.28 497 0.41 622 0.56 735 0.72 837
-
-
-
-
-
-
-
-
-
662
0.75
762
0.93 855
1.12
942
1.33 1025
-
-
-
-
-
34°F/42°F 2200 0.43 553 0.58
710
1.00
800
1.20 885
1.41
965
1.63 1042
-
-
-
-
-
28°F/36°F 2600 0.63 614 0.81
766
1.32
847
1.54 1731 1.77
997
2.01 1068
2.51 1202
3.04 1328 3.60 1446
25°F/31°F 3000 0.91 680 1.11
825
1.72
899
1.96 970
2.21 1038 2.47 1104
3.01 1229
3.58 1347 4.17 1459
22°F/27°F 3400 1.26 748 1.48
873
2.08
942
2.34 1008 2.60 1072 2.88 1135
3.45 1254
4.04 1367 4.67 1474
20°F/25°F 3704 1.58 802 1.83
End 100
938
2.63 1001 2.91 1062 3.20 1122 3.49 1180
4.10 1291
4.74 1398
-
- / 23°F 4100 2.09 873 2.35
-
-
-
-
-
- / 20°F 4630 2.93 969 3.23 1028 3.53 1085 3.84 1140 4.16 1194 4.48 1247
884
0.38 1023 0.48 1148 0.59 1262 0.70 1369
0.94 1563
1.21 1738 1.48 1899
150/175 C,D 100°F/117°F 1111 0.19 727 0.28
937
0.47 1066 0.59 1184 0.71 1293 0.83 1395
1.09 1582
1.37 1752 1.66 1909
86°F/100°F 1296 0.27 793 0.37
Start 175
970
0.54 1093 0.66 1208 0.78 1313 0.91 1412
1.18 1596
1.47 1763 1.78 1917
79°F/93°F 1400 0.32 832 0.42
1.62 1667
1.95 1823 2.29 1967
62°F/72°F 1800 0.59 994 0.72 1109 0.86 1216 1.00 1316 1.15 1410 1.30 1500
2.20 1762
2.57 1906 2.96 2041
51°F/59°F 2200 1.00 1166 1.16 1264 1.32 1356 1.49 1444 1.66 1529 1.84 1610
2.95 1877
-
-
-
43°F/50°F 2600 1.58 1344 1.76 1429 1.95 1510 2.14 1589 2.34 1664 2.54 1737
-
-
-
-
-
-
-
-
-
37°F/43°F 3000 2.35 1526 2.57 1600 2.78 1673 3.00 1743
1296
-
-
0.25
609
0.37
734
-
-
-
-
-
-
-
-
-
-
-
150/175 E,F 86°F/100°F
615
0.40
737
-
-
-
-
-
-
-
-
-
-
-
79°F/93°F 1400 0.17 474 0.28
650
0.55
760
0.70 859
0.85
952
-
-
-
-
-
-
-
62°F/72°F 1800 0.28 526 0.41
697
0.75
796
0.91 887
1.09
972
1.27 1052
1.67 1201
-
-
-
51°F/59°F 2200 0.44 588 0.59
753
1.01
842
1.19 925
1.39 1004 1.59 1078
2.02 1218
2.47 1348 2.96 1469
43°F/50°F 2600 0.67 657 0.83
815
1.35
895
1.55 972
1.76 1044 1.98 1114
2.45 1245
2.94 1368 3.45 1483
37°F/43°F 3000 0.96 729 1.15
881
1.77
955
2.00 1025 2.23 1092 2.47 1157
2.96 1280
3.49 1396 4.03 1505
33°F/38°F 3400 1.35 804 1.55
951
2.29 1018 2.53 1083 2.79 1146 3.04 1206
3.58 1322
4.14 1431 4.72 1535
29°F/34°F 3800 1.82 880 2.05
4.30 1369
4.90 1472
-
26°F/31°F 4200 2.40 959 2.66 1023 2.92 1085 3.18 1145 3.45 1204 3.73 1260
-
-
-
-
-
24°F/28°F 4700 3.30 1058 3.58 1116 3.87 1172 4.16 1227 4.46 1281 4.76 1333
-
-
-
-
-
-
-
-
-
-
-
-
-
21°F/25°F 5200 4.40 1158 4.71 1212
1.26 1646
1.54 1808 1.84 1958
200/225 C,D 100°F/113°F 1481 0.36 871 0.48 1016 0.60 1144 0.73 1259 0.85 1366 0.99 1465
Start 225
1.47 1682
1.77 1842 2.09 1988
89°F/100°F 1667 0.48 943 0.61 1078 0.75 1198 0.88 1309 1.03 1411 1.17 1507
1.57 1700
1.88 1857 2.21 2003
85°F/95°F 1750 0.54 975 0.68 1106 0.82 1224 0.96 1332 1.11 1433 1.26 1527
1.91 1758
2.26 1910 2.62 2051
74°F/83°F 2000 0.76 1077 0.92 1197 1.08 1306 1.24 1407 1.40 1502 1.57 1592
2.31 1822
2.69 1969
-
66°F/74°F 2250 1.04 1181 1.21 1291 1.39 1393 1.57 1488 1.75 1577 1.94 1663
2.78 1892
-
-
-
59°F/67°F 2500 1.38 1288 1.57 1389 1.77 1484 1.97 1573 2.17 1658 2.37 1739
-
-
-
-
-
54°F/61°F 2750 1.79 1396 2.00 1490 2.22 1579 2.44 1663 2.66 1743 2.88 1820
-
-
-
-
-
-
-
-
-
49°F/56°F 3000 2.28 1506 2.51 1593 2.75 1677 2.98 1756
723
0.58
838
0.75 944
0.94 1042 1.14 1134
1.58 1303
2.07 1458 2.60 1600
85°F/95°F 1750 0.29 594 0.43
200/225 E,F
759
0.71
866
0.88 966
1.08 1058 1.28 1146
1.74 1309
2.23 1458 2.78 1595
74°F/83°F 2000 0.40 642 0.54
845
1.04
938
1.23 1025 1.45 1108 1.67 1188
2.15 1337
2.67 1475 3.24 1604
59°F/67°F 2500 0.68 746 0.85
942
1.50 1024 1.72 1101 1.95 1176 2.19 1248
2.71 1384
3.27 1511 3.86 1632
49°F/56°F 3000 1.09 857 1.29
3.43 1455
4.03 1563
-
42°F/48°F 3500 1.66 972 1.88 1047 2.12 1119 2.36 1188 2.61 1255 2.88 1320
4.35 1518
4.98 1628
-
37°F/42°F 4000 2.40 1091 2.65 1157 2.91 1221 3.18 1284 3.46 1345 3.75 1404
-
-
-
-
-
33°F/37°F 4500 3.34 1211 3.62 1270 3.91 1329 4.21 1385 4.51 1441 4.82 1495
-
-
-
-
-
-
-
-
-
-
-
-
-
30°F/33°F 5000 4.52 1332 4.82 1387
546
0.48
653
-
-
-
-
-
-
-
-
-
-
-
200/225 G,H 85°F/95°F 1750 0.20 425 0.33
562
0.56
662
0.74 754
-
-
-
-
-
-
-
-
-
74°F/83°F 2000 0.26 449 0.40
603
0.75
692
0.94 774
1.16
851
1.38
925
-
-
-
-
-
59°F/67°F 2500 0.42 507 0.58
654
1.02
732
1.23 807
1.45
877
1.69
944
2.21 1071
-
-
-
49°F/56°F 3000 0.65 571 0.83
713
1.38
782
1.60 850
1.84
914
2.10
975
2.64 1093
3.23 1202 3.86 1307
42°F/48°F 3500 0.97 639 1.17
776
1.83
839
2.08 899
2.34
958
2.60 1014
3.18 1123
3.80 1226 4.46 1324
37°F/42°F 4000 1.38 710 1.60
842
2.40
899
2.66 955
2.94 1008 3.23 1061
3.84 1161
4.48 1258
-
33°F/37°F 4500 1.90 783 2.14
911
3.08
963
3.37 1014 3.67 1064 3.98 1112
4.62 1206
-
-
-
30°F/33°F 5000 2.54 858 2.81
982
3.91 1030 4.22 1077 4.54 1123 4.87 1168
-
-
-
-
-
27°F/30°F 5500 3.32 933 3.61
-
-
-
-
-
-
-
-
-
-
-
25°F/28°F 6000 4.25 1009 4.57 1054 4.89 1099
① Total static pressure should include external static pressure and accessory / option static pressure from Table 38.1. Unit internal resistance has been included in the unit performance tables.
② Brake Horsepower and RPM values are approximate values only. Please consult the AccuSpec selection software for values at other than listed CFM / static pressures.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual AIR5-173.5
39
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 40.1
Unit Performance Tables
Digit Unit Size16
Air
Temp.
Rise
0.25
CFM BHP
100°F / 120°F 1852 0.26
250/300 E,F
83°F / 100°F 2222 0.39
Start300
74°F / 89°F 2500 0.51
62°F / 74°F 3000 0.80
53°F / 63°F 3500 1.19
46°F / 56°F 4000 1.69
41°F / 49°F 4500 2.34
37°F / 44°F 5000 3.14
34°F / 40°F 5500 4.11
-
250/300 G,H 100°F / 120°F 1852
83°F / 100°F 2222 0.28
Start300
74°F / 89°F 2500 0.35
62°F / 74°F 3000 0.53
53°F / 63°F 3500 0.76
46°F / 56°F 4000 1.07
41°F / 49°F 4500 1.45
37°F / 44°F 5000 1.92
34°F / 40°F 5500 2.50
31°F / 37°F 6000 3.16
28°F / 34°F 6500 3.96
-
46°F / 56°F 4000
250/300 I, J, K
-
37°F / 44°F 5000
31°F / 37°F 6000 1.94
26°F / 32°F 7000 2.93
23°F / 28°F 8000 4.24
20°F / 24°F 9259 6.40
End 250
- / 22°F 10000 7.97
- / 20°F 11111 10.79
100°F / - 2593 0.61
350/400 E,F
96°F / - 2700 0.67
87°F / 100°F 2963 0.85
Start400
74°F / 85°F 3500 1.30
65°F / 74°F 4000 1.86
58°F / 66°F 4500 2.57
52°F / 59°F 5000 3.44
47°F / 54°F 5500 4.50
350/400 G,H 100°F / - 2593 0.43
Start 400
87°F / 100°F 2963 0.57
74°F / 85°F 3500 0.85
65°F / 74°F 4000 1.19
58°F / 66°F 4500 1.61
52°F / 59°F 5000 2.22
47°F / 54°F 5500 2.77
43°F / 49°F 6000 3.53
40°F / 46°F 6500 4.42
-
350/400 I,J,K 100°F / - 2593
Start 400
-
87°F / 100°F 2963
-
65°F / 74°F 4000
52°F / 59°F 5000 1.37
43°F / 49°F 6000 2.20
37°F / 42°F 7000 3.34
32°F / 37°F 8000 4.84
29°F / 33°F 9000 6.75
26°F / 30°F 10000 9.13
24°F / 27°F 11000 12.01
23°F / 26°F 11500 13.66
①②
0.50
0.75
RPM BHP RPM BHP RPM
532
0.39
665
0.54
782
582
0.54
703
0.70
810
625
0.68
736
0.85
836
706
0.99
803
1.19
893
793
1.41
878
1.64
959
882
1.94
958
2.20 1032
974
2.62 1043 2.90 1109
1067 3.44 1130 3.76 1191
1161 4.44 1219 4.78 1275
-
0.34
519
0.49
623
424
0.43
537
0.61
634
447
0.52
553
0.71
646
492
0.72
588
0.93
674
542
0.98
878
1.21
707
594
1.31
673
1.57
746
649
1.72
721
2.00
789
706
2.22
771
2.52
834
767
2.81
824
3.14
882
822
3.52
878
3.87
933
881
4.34
934
4.72
984
-
0.97
507
1.25
583
-
1.51
560
1.84
626
559
2.29
620
2.66
679
632
3.33
686
3.75
738
707
4.69
755
5.16
802
804
6.91
846
7.45
887
862
8.52
901
9.09
939
949 11.40 985 12.03 1020
668
0.80
781
1.01
882
686
0.87
796
1.08
895
730
1.06
834
1.28
928
826
1.54
917
1.80 1002
918
2.13 1000 2.42 1078
1012 2.87 1087 3.18 1158
1109 3.78 1177 4.12 1242
1206 4.87 1269
-
-
479
0.62
585
0.84
679
516
0.79
614
1.02
702
574
1.09
662
1.35
742
631
1.45
710
1.74
784
690
1.91
762
2.22
830
767
2.46
817
2.80
880
813
3.12
874
3.49
933
876
3.91
933
4.30
987
939
4.82
992
-
-
-
-
-
0.77
561
-
-
-
0.89
571
-
1.07
533
1.37
609
515
1.69
590
2.04
658
588
2.58
654
2.97
715
665
3.77
723
4.22
778
744
5.33
796
5.83
845
824
7.29
871
7.85
917
906
9.72
948 10.33 990
988 12.66 1027 13.32 1065
12.09 14.34 1067
-
-
1.00
BHP
0.69
0.87
1.04
1.40
1.87
2.46
3.19
4.08
-
0.66
0.79
0.90
1.15
1.45
1.83
2.29
2.84
3.49
4.24
-
1.56
2.19
3.06
4.19
5.64
7.99
9.67
12.66
1.22
1.30
1.52
2.07
2.71
3.51
4.47
-
1.09
1.28
1.63
2.04
2.55
3.15
3.87
4.70
-
1.04
1.18
1.69
2.41
3.39
4.68
6.34
8.41
10.95
14.00
-
RPM
887
909
930
978
1036
1102
1174
1250
-
713
721
730
752
780
814
852
894
938
984
-
654
688
734
788
847
927
977
1054
975
986
1015
1081
1151
1226
1305
-
764
782
815
853
895
940
989
1040
-
639
646
679
721
772
830
893
960
1030
1103
-
Total Static Pressure, "W.C.
1.25
1.50
BHP
0.85
1.05
1.23
1.62
2.12
2.73
3.49
4.40
-
0.85
0.99
1.11
1.38
1.71
2.11
2.59
3.16
3.83
4.61
-
1.89
2.56
3.46
4.64
6.14
8.55
10.27
13.31
1.45
1.53
1.76
2.34
3.01
3.84
4.84
-
1.35
1.56
1.93
2.36
2.89
3.52
4.25
-
-
1.34
1.49
2.03
2.79
3.82
5.16
6.87
8.99
11.58
14.68
-
RPM
985
1000
1016
1058
1109
1170
1236
1308
-
795
800
806
824
848
878
912
950
991
1035
-
719
748
787
836
891
966
1014
1087
1061
1071
1097
1157
1221
1291
1366
-
841
856
885
918
956
998
1042
-
-
709
715
742
779
826
879
938
1002
1069
1139
-
BHP
1.03
1.24
1.43
1.84
2.36
3.01
3.79
4.73
-
1.05
1.20
1.33
1.62
1.97
2.39
2.90
3.50
4.19
5.00
-
2.24
2.95
3.89
5.11
6.65
9.12
10.87
13.97
1.69
1.78
2.02
2.62
3.32
4.18
-
-
1.64
1.86
2.25
2.70
3.25
3.90
4.66
-
-
1.66
1.81
2.40
3.19
4.26
5.65
7.41
9.58
12.22
-
-
RPM
1074
1085
1099
1133
1179
1234
1296
1364
-
870
872
877
892
912
939
969
1004
1042
1084
-
781
804
838
882
933
1004
1050
1121
1142
1151
1174
1228
1288
1353
-
-
1142
926
951
980
1014
1053
1095
-
-
774
779
802
835
877
927
982
1043
1107
-
-
2.00
BHP
1.39
1.64
1.85
2.31
2.88
3.58
4.41
-
-
1.47
1.65
1.81
2.13
2.52
2.99
3.54
4.18
4.93
-
-
-
3.77
4.79
6.09
7.72
10.30
12.12
-
2.19
2.29
2.56
3.22
3.97
4.88
-
-
2.26
2.50
2.93
3.41
4.00
4.70
-
-
-
2.36
2.54
3.18
4.05
5.20
6.68
8.53
10.80
13.54
-
-
RPM
1239
1242
1250
1275
1312
1358
1412
-
-
1005
1005
1006
1016
1031
1052
1077
1107
1140
-
-
-
908
935
971
1015
1079
1120
-
1290
1297
1316
1362
1414
1472
-
-
1046
1053
1072
1096
1124
1157
-
-
-
891
894
910
937
973
1016
1066
1121
1180
-
-
2.50
BHP
1.79
2.06
2.30
2.81
3.42
4.17
-
-
-
1.94
2.14
2.32
2.68
3.11
3.62
4.22
4.90
-
-
-
-
4.67
5.75
7.13
8.83
11.52
13.41
-
2.73
2.84
3.13
3.84
4.65
-
-
-
2.94
3.20
3.66
4.19
4.81
-
-
-
-
3.14
3.34
4.04
4.98
6.21
7.77
9.70
12.07
14.90
-
-
RPM
1387
1385
1389
1406
1435
1474
-
-
-
1126
1123
1123
1129
1140
1156
1177
1202
-
-
-
-
1005
1025
1055
1093
1150
1187
-
1425
1431
1446
1486
1531
-
-
-
1165
1170
1183
1202
1226
-
-
-
-
995
997
1009
1030
1061
1099
1144
1194
1249
-
-
3.00
BHP
2.21
2.52
2.78
3.33
3.99
4.78
-
-
-
2.44
2.67
2.87
3.27
3.74
4.28
4.92
-
-
-
-
-
-
6.77
8.22
10.00
12.79
14.74
-
3.30
3.42
3.74
4.50
-
-
-
-
3.68
3.96
4.45
-
-
-
-
-
-
4.00
4.20
4.96
5.96
7.26
8.90
10.92
13.37
-
-
-
RPM
1523
1517
1517
1529
1552
1584
1237
1231
1230
1232
1240
1253
1270
1110
1134
1167
1218
1252
1550
1555
1568
1602
1275
1277
1287
1090
1091
1099
1117
1144
1178
1219
1265
-
① Total static pressure should include external static pressure and accessory / option static pressure from Table 38.1. Unit internal resistance has been included in the unit performance tables.
② Brake Horsepower and RPM values are approximate values only. Please consult the AccuSpec selection software for values at other than listed CFM / static pressures.
40
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 41.1
Unit Performance Tables
Unit
Size
500/600
Start 600
500/600
Start 600
End 500
500/600
Air
Digit 16
G or H
I, J, K
L
Start 500
700/800
Start 800
G or H
700/800
Start 800
I, J, K
700/800
L
End 700
840/960
I, J, K
End 840
840/960
End 840
①②
L
Temp
Rise
120°F / -
106°F / -
100°F / 120°F
93°F / 111°F
82°F / 99°F
74°F / 89°F
67°F / 81°F
62°F / 74°F
57°F / 68°F
120°F / -
100°F / 120°F
93°F / 111°F
74°F / 89°F
62°F / 74°F
53°F / 63°F
46°F / 56°F
41°F / 49°F
- / 44°F
- / 43°F
- / 40°F
- / 40°F
62°F / 74°F
53°F / 63°F
46°F / 56°F
41°F / 49°F
- / 44°F
- / 43°F
- / 40°F
- / 40°F
120°F / -
115°F / -
105°F / 120°F
104°F / 119°F
94°F / 108°F
86°F / 99°F
80°F / 91°F
120°F / -
104°F / 119°F
86°F / 99°F
65°F / 74°F
58°F / 66°F
52°F / 59°F
47°F / 54°F
43°F / 49°F
40°F / 46°F
65°F / 74°F
58°F / 66°F
52°F / 59°F
47°F / 54°F
47°F / 54°F
43°F / 49°F
40°F / 46°F
- / 42°F
- / 41°F
120°F / -
111°F / -
105°F / 120°F
97°F / 111°F
86°F / 99°F
78°F / 89°F
70°F / 80°F
65°F / 74°F
62°F / 71°F
60°F / 68°F
86°F / 99°F
78°F / 89°F
70°F / 80°F
65°F / 74°F
60°F / 68°F
- / 63°F
Total Static Pressure, "W.C.
0.25
0.50
0.751.001.251.502.002.503.00
CFM BHPRPMBHPRPM BHPRPM BHPRPM BHP RPM BHPRPM BHP RPMBHP RPM BHP RPM
3086
3500
3704
4000
4500
5000
5500
6000
6500
3086
3704
4000
5000
6000
7000
8000
9000
10000
10400
11000
11111
6000
7000
8000
9000
10000
10400
11000
11111
4321
4500
4938
5000
5500
6000
6500
4321
5000
6000
8000
9000
10000
11000
12000
13000
8000
9000
10000
11000
11050
12000
13000
14000
14500
6481
7000
7407
8000
9000
10000
11050
12000
12500
13000
9000
10000
11050
12000
13000
14000
0.62
0.84
0.97
1.18
1.61
2.13
2.77
3.53
4.41
0.46
0.69
0.82
1.43
2.31
3.51
5.09
7.11
9.62
10.77
12.66
13.04
1.69
2.57
3.73
5.21
7.04
7.88
9.27
9.54
1.51
1.68
2.15
2.23
2.89
3.68
4.61
0.87
1.26
2.02
4.44
6.19
8.36
11.00
14.16
17.88
3.26
4.54
6.13
8.06
8.17
10.37
13.09
16.26
18.02
2.72
3.36
3.93
4.87
6.80
9.20
12.28
15.60
17.58
19.71
5.01
6.78
9.04
11.48
14.50
18.02
529 0.82
575 1.06
598 1.20
633 1.43
693 1.88
755 2.43
818 3.10
882 3.89
946 4.80
401 0.69
443 0.95
464 1.09
542 1.75
624 2.68
709 3.94
797 5.57
885 7.65
975 10.21
1011 11.38
1065 13.31
1075 13.69
512 1.97
580 2.89
650 4.09
721 5.60
793 7.48
823 8.34
866 9.75
874 10.03
685 1.80
708 1.98
763 2.48
770 2.55
834 3.25
900 4.06
965
-
443 1.14
488 1.55
558 2.36
707 4.89
784 6.69
861 8.91
940 11.60
1019 14.81
1098 18.59
566 3.60
626 4.92
687 6.54
749 8.52
752 8.62
811 10.86
873 13.63
936 16.83
968 18.61
630 3.09
672 3.76
705 4.35
754 5.33
837 7.31
921 9.76
1010 12.89
1091 16.27
1134 18.27
1177 -
675 5.40
742 7.21
812 9.51
876 12.00
945 15.05
1013 18.61
620
658
678
709
762
818
876
936
996
496
527
544
609
682
760
842
926
1012
1046
1099
1109
565
626
691
758
827
855
897
905
760
780
89
836
895
956
-
421
558
619
755
827
901
976
1052
1129
611
667
724
782
785
842
902
963
994
685
723
754
799
878
958
1044
1123
1164
-
715
778
845
907
973
1039
1.03
1.30
1.45
1.69
2.17
2.75
3.44
4.25
-
0.95
1.23
1.39
2.09
3.07
4.38
6.07
8.20
10.81
12.01
13.97
14.36
2.26
3.22
4.46
6.01
7.93
8.80
10.24
10.52
2.11
2.30
2.82
2.90
3.62
4.46
-
1.42
1.87
2.73
5.35
7.20
9.47
12.22
15.48
19.30
3.95
5.30
6.97
8.98
9.09
11.37
14.17
17.41
19.21
3.48
4.17
4.79
5.90
7.83
10.33
13.52
16.95
18.97
-
5.80
7.64
9.99
12.51
15.62
19.21
703
736
753
779
827
878
932
988
-
580
604
618
673
738
809
886
965
1048
1081
1132
1141
615
671
731
795
860
887
927
935
830
847
893
899
953
1010
-
591
623
677
801
869
939
1011
1085
1159
654
706
760
815
818
872
930
989
1019
736
772
800
843
918
995
1078
1154
1194
-
753
812
877
937
1000
1065
1.26
1.54
1.70
1.96
2.46
3.07
3.79
4.63
-
1.23
1.54
1.71
2.46
3.48
4.84
6.58
8.76
11.43
12.64
14.64
15.03
2.57
3.56
4.84
6.43
8.39
9.28
10.74
11.02
2.43
2.63
3.17
3.26
4.00
4.87
-
1.72
2.20
3.10
5.82
7.72
10.04
12.84
16.15
-
4.31
5.70
7.40
9.45
9.56
11.88
14.72
18.00
19.82
3.88
4.60
5.23
6.27
8.36
10.91
14.16
17.63
19.69
-
6.21
8.09
10.48
13.04
16.18
19.82
779
807
822
846
889
936
986
1038
-
657
675
686
733
791
857
928
1001
1083
1115
1164
1174
664
714
770
830
892
918
957
964
896
912
953
959
1009
1062
-
657
683
731
845
909
976
1045
1117
-
696
744
794
847
850
902
958
1015
1045
785
818
845
885
956
1030
1110
1184
1224
-
789
846
908
966
1028
1091
1.50
1.80
1.97
2.24
2.77
3.40
4.15
-
-
-
-
2.05
2.84
3.91
5.31
7.10
9.33
12.05
13.29
15.32
15.72
2.89
3.92
5.23
6.86
8.85
9.76
11.24
11.53
2.77
2.98
3.54
3.63
4.40
-
-
2.04
2.54
3.49
6.30
8.25
10.62
13.47
16.83
-
4.67
6.10
7.85
9.93
10.04
12.40
15.27
18.59
-
4.30
5.04
5.69
6.76
8.90
11.50
14.80
18.32
-
-
6.62
8.54
10.97
13.57
16.75
-
849
874
887
908
948
991
1038
-
-
-
-
749
790
842
903
970
1042
1118
1149
1197
1205
710
756
808
864
924
949
986
993
958
973
1011
1016
1063
-
-
717
740
782
888
949
1012
1079
1148
-
736
780
828
879
881
931
986
1041
-
832
863
888
926
994
1065
1142
1214
-
-
825
879
939
994
1054
-
1.75
2.07
2.25
2.53
3.09
3.74
4.51
-
-
-
-
2.42
3.24
4.35
5.80
7.64
9.92
12.69
13.95
16.01
16.41
3.23
4.29
5.64
7.30
9.33
10.25
11.76
12.05
3.13
3.34
3.93
4.02
4.81
-
-
2.37
2.90
3.89
6.79
8.79
11.21
14.11
17.52
-
5.05
6.52
8.30
10.42
10.53
12.92
15.83
19.19
-
4.72
5.49
6.16
7.26
9.44
12.10
15.45
19.02
-
-
7.05
9.00
11.47
14.11
17.33
-
916
937
949
968
1001
1044
1088
-
-
-
-
810
844
891
947
1010
1079
1152
1182
1228
1237
755
797
845
898
955
979
1015
1022
1018
1032
1066
1072
1116
-
-
774
794
832
930
987
1048
1112
1179
-
774
816
861
910
912
960
1013
1066
-
876
905
929
965
1030
1099
1173
1243
-
-
859
911
968
1022
1081
-
2.28
2.63
2.83
3.14
3.74
4.44
-
-
-
-
-
-
4.09
5.29
6.82
8.75
11.13
14.00
15.30
17.42
17.83
-
5.06
6.47
8.21
10.31
11.26
12.81
13.12
3.88
4.11
4.74
4.83
-
-
-
3.08
3.66
4.73
7.81
9.90
12.42
15.41
18.92
-
5.84
7.37
9.22
11.41
11.53
13.99
16.98
-
-
5.60
6.42
7.13
8.28
10.56
13.32
16.77
-
-
-
7.91
9.95
12.50
15.20
18.50
-
1038
1054
1064
1080
1110
1145
-
-
-
-
-
-
946
984
1032
1089
1151
1218
1247
1290
1298
-
874
916
964
1016
1038
1071
1078
1131
1142
1172
1176
-
-
-
879
894
924
1009
1061
1117
1176
1239
-
848
885
925
969
972
1016
1065
-
-
960
986
1007
1040
1100
1164
1234
-
-
-
925
973
1026
1076
1132
-
2.84 1149
3.23 1162
3.44 1170
3.78 1183
4.43 1208
-
-
-
-
-
-
-
-
-
-
-
-
-
-
5.01 1041
6.28 1072
7.90 1113
9.92 1163
12.38 1220
15.35 1283
-
-
-
-
-
-
-
-
-
-
7.35 984
9.16 1027
11.33 1074
12.31 1095
13.90 1126
14.21 1132
4.69 1236
4.94 1245
-
-
-
-
-
-
-
-
-
-
3.84 974
4.47 985
5.62 1010
8.87 1085
11.04 1131
13.66 1183
16.74 1238
-
-
-
-
6.66 918
8.25 950
10.17 987
12.43 1027
12.56 1029
15.08 1070
18.14 1116
-
-
-
-
6.52 1038
7.38 1061
8.13 1081
9.33 1111
11.71 1166
14.56 1226
-
-
-
-
-
-
-
-
8.81 988
10.91 1032
13.54 1081
16.32 1129
19.70 1181
-
-
3.44
3.86
4.09
4.45
-
-
-
-
-
-
-
-
-
7.33
9.03
11.13
13.69
-
-
-
-
-
-
-
10.14
12.38
13.38
-
-
-
-
-
-
-
-
-
4.65
5.33
6.55
9.96
12.23
14.93
-
-
-
7.51
9.17
11.15
13.48
13.61
16.20
19.33
-
-
7.48
8.39
9.17
10.43
12.90
-
-
-
-
-
9.73
11.91
14.61
17.46
-
-
1252
1262
1268
1279
1155
1191
1235
1287
1088
1131
1150
1063
1071
1091
1156
1199
1246
984
1012
1046
1083
1084
1123
1166
1112
1133
1151
1179
1230
1048
1088
1135
1179
-
① Total static pressure should include external static pressure and accessory / option static pressure from Table 38.1. Unit internal resistance has been included in the unit performance tables.
② Brake Horsepower and RPM values are approximate values only. Please consult the AccuSpec selection software for values at other than listed CFM / static pressures.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
41
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 42.1 - Digit 19 — Sheave Arrangement for Digit 16 = A or B (9-7 Blower Units)
Motor Frame Size656-1001
48
A
56
B
143 or 145
RPM Range
978-12651150-15611526-18581763-2147
C
D
F
H
J
E
G
I
K Table 42.2 - Digit 19 — Sheave Arrangement for Digit 16 = C or D (9-9 Blower Units)
RPM Range
Motor Frame Size656-1001
978-12651150-15611526-18581763-2147
48
A
C
56
B
D
F
i
l
143 or 145
e
g
j
m
182 or 184h
k
n
Table 42.3 - Digit 19 — Sheave Arrangement for Digit 16 = E or F (12-12 Blower Units)
RPM Range
Motor Frame Size468-715644-874863-10781029-13321150-14381327-1659
48
A
56
B
cf
Q
143 or 145dgil
182 or 184ehjmo
213 or 215
knp
Table 42.4 - Digit 19 — Sheave Arrangement for Digit 16 = G or H (15-15 Blower Units)
RPM Range
Motor Frame Size410-625568-771767-958
934-11361136-1380
48
A
56
B
D
G
O
143 or 145
C
ehj
182 or 184fi
km
213 or 215ln
Table 42.5 - Digit 19 — Sheave Arrangement for Digit 16 = I or J (18-18 Blower Units under 15 Hp motor)
RPM Range
Motor Frame Size491-624586-744682-821821-1009
56
A
D
143 or 145
B
E
H
182 or 184
C
F
I
K
213 or 215
G
J
L
254
M
256
N
995-11611101-1285
O
P
Q
R
S
T
U
Table 42.6 - Digit 19 — Sheave Arrangement for Digit 16 = K (18-18 Blower Units with 15 Hp motor & up)
Motor Frame Size
RPM Range
826-1009
995-11611101-12851232-1438
254
A
C
E
256
B
D
F
284
G
IK
M
286
H
J
L
N
Table 42.7 - Digit 19 — Sheave Arrangement for Digit 16 = L (20-18 Blower Units)
RPM Range
Motor Frame Size491-649626-765765-901
901-1059
995-11611101-1285
143 or 145
A
C
182 or 184
B
D
F
L
213 or 215
E
254
256
284
286
42
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
G
H
I
J
K
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Gas-Fired Indoor and Outdoor Duct Furnaces
Total Unit Amp Draw
The total unit amp draw is a combination of the motor, the control step down transformer, the power exhauster motor, and the
evaporative cooler pump motor (or step down transformer for 208V/1Ph, 208V/3Ph, 460V/3Ph, or 575V/3Ph units) where applicable.
The control step down transformer includes damper actuators, ignition controllers, gas valves, control relays, amplifiers, and motor
starters.
Motor Amp Draw (Tables 44.1 to 48.1) =
Control Step Down Transformer Amp Draw (Table 43.1) =
Power Exhauster Motor Amp Draw (Table 43.2) =
Evaporative Cooler Amp Draw (Table 43.3 or 43.4) =
+ ____________
Total Amp Draw =
Table 43.1 - Control Step Down Transformer Amp Draws
Digit 14 (Supply Voltage)
Digit 15
A
B
C
D
E
(Transformer)
(115/60/1)
(208/60/1)
(230/60/1)
(208/60/3)
(230/60/3)
F
(460/60/3)
G
(575/60/3)
0
0
0
0
0
0
0
0
1
2
3
4
0.35
0.65
1.30
2.17
0.19
0.36
0.72
1.2
0.17
0.33
0.65
1.09
0.19
0.36
0.72
1.20
0.17
0.33
0.65
1.09
0.09
0.16
0.33
0.54
0.07
0.13
0.26
0.43
Table 43.2 - Power Exhauster Motor Amp Draws (Outdoor Power Vented and Separated Combustion Only) ①
Digit 14 (Supply Voltage)
Model
A
B
C
D
E
F
G
Size
(115/60/1)
(208/60/1)
(230/60/1)
(208/60/3)
(230/60/3)
(460/60/3)
(575/60/3)
75-175
1.40
0.70
0.66/0.60
0.70
0.66/0.60
0.54②
0.43②
200-400
2.00/2.40
1.10/1.40
0.95/1.30
1.10/1.40
0.95/1.30
0.54②/1.08③
0.43②/0.87③
500-800
4.00/4.80
2.20/2.80
1.90/2.60
2.20/2.80
1.90/2.60
1.08③/1.63④
0.87③/1.03④
840-960
6.00/7.20
3.30/4.20
2.85/3.90
3.30/4.20
2.85/3.90
1.63④/2.17⑤
1.30④/1.74⑤
Table 43.3 - Evaporative Cooler Amp Draws for 6" Media for Outdoor Units (Digit 22 = 3 or 5)
B ➁
Digit 14 (Supply Voltage)
Model Size
Blower
Type (Digit 16)
A
(115/60/1)
(208/60/1)
C
(230/60/1)
D ➁
(208/60/3)
E
(230/60/3)
F ➅
(460/60/3)
G➅
(575/60/3)
All
All
0.80
1.20
0.40
1.20
0.40
0.54
0.43
Table 43.4 - Evaporative Cooler Amp Draws for 12" Media for Outdoor Units (Digit 22 = 4 or 6)
Model Size
75
100/125
150/175
200/225
250/300/500/600
250/300/500/600
350/400/700/800
350/400/700/800/840/960
Blower
A
Type (Digit 16) (115/60/1)
All
All
All
All
E,F,G, or H
I, J, K, or L
E,F,G, or H
I, J, K, or L
0.80
0.80
1.00
1.00
1.00
1.10
1.00
1.10
Digit 14 (Supply Voltage)
B ➁
(208/60/1)
C
(230/60/1)
D ➁
(208/60/3)
E
(230/60/3)
F ➅
(460/60/3)
G➅
(575/60/3)
1.20
1.20
1.20
1.20
1.20
1.20
1.20
1.20
0.40
0.40
0.50
0.50
0.50
0.56
0.50
0.56
1.20
1.20
1.20
1.20
1.20
1.20
1.20
1.20
0.40
0.40
0.50
0.50
0.50
0.56
0.50
0.56
0.54
0.54
0.54
0.54
0.54
0.54
0.54
0.54
0.43
0.43
0.43
0.43
0.43
0.43
0.43
0.43
➀ When 2 amp draws are listed, the first is for Outdoor units and the second is for Separated Combustion units.
➁ Amp draw is for a 250 VA transformer. ➂ Amp draw is for a 500 VA transformer.
④ Amp draw is for a 750 VA transformer.
⑤ Amp draw is for a 1000 VA transformer.
➅ Only include amp draw for gravity vented models. For power vented models, the step down transformer amp draw is included in the
Power Exhauster Motor Amp Draw. Amp draw is for 250 VA step down transformer.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
43
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 44.1
Motor Data for Digit 14 = A - 115V/60Hz/1Ph
Digits
17&18
Motor
Size (HP)
1/3
A1
1/3
A5
1/2
B1
1/2
B5
3/4
C1
3/4
C5
1 D1
1 D5
1 1/2
E1
1 1/2
E5
2 F1 or R1 2 F5 or R5 3 G1 or S1
3 G5 or S5 Motor
Type ➀
Frame
Size
Amp.
Draw
Service
Factor
Thermal
Overload
Weight
(lbs)
Efficiency
➁ (%)
ODP
TENV
ODP
TEFC
ODP
TE
ODP
TE
ODP
TE
ODP
TE
ODP
TE
56
48
56
56
56
56
56
56
56
56
145T
182T
184T
184T
6.6
5.0
9.0
8.0
11.0
11.0
13.4
13.4
18.0
15.2
21.0
20.0
34.0
32.0
1.35
1.00
1.25
1.15
1.25
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.00
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
25
25
23
28
25
30
32
37
40
45
49
54
81
83
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Table 44.2
Motor Data for Digit 14 = B - 208V/60Hz/1Ph
Digits
17&18
A1
B1
B5
C1
C5
D1
D5
E1
E5
F1 or R1
F5 or R5
H1 or T1
H5 or T5
Motor
Size (HP)
Motor
Type ➀
Frame
Size
Amp.
Draw
Service
Factor
Thermal
Overload
Weight
(lbs)
Efficiency
➁ (%)
1/3
1/2
1/2
3/4
3/4
1 1 1 1/2
1 1/2
2 2 5 5 ODP
ODP
TEFC
ODP
TE
ODP
TE
ODP
TE
ODP
TE
ODP
TE
56
56
56
56
56
56
56
56
56
145T
182T
184T
184T
3.0
4.1
4.0
5.5
5.4
6.8
6.8
9.3
8.2
11.3
10.8
23.0
22.8
1.35
1.25
1.15
1.25
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.00
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
25
23
28
25
30
32
37
40
45
49
54
87
86
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Amp.
Draw
Service
Factor
Thermal
Overload
Weight
(lbs)
Efficiency
➁ (%)
1.35
1.00
1.25
1.15
1.25
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.00
1.15
1.00
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
25
25
23
28
25
30
32
37
40
45
49
54
81
83
87
86
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Table 44.3
Motor Data for Digit 14 = C - 230V/60Hz/1Ph
Digits
17&18
A1
A5
B1
B5
C1
C5
D1
D5
E1
E5
F1 or R1 F5 or R5 G1 or S1 G5 or S5 H1 or T1 H5 or T5 ➀
➁
Motor
Size (HP)
1/3
1/3
1/2
1/2
3/4
3/4
1 1 1 1/2
1 1/2
2 2 3 3 5 5 Motor
Type ➀
Frame
Size
ODP
TENV
ODP
TEFC
ODP
TE
ODP
TE
ODP
TE
ODP
TE
ODP
TE
ODP
TE
56
48
56
56
56
56
56
56
56
56
145T
182T
184T
184T
184T
184T
3.3
2.5
4.5
4.0
5.5
5.5
6.7
6.7
9.0
7.6
10.5
10.0
17.0
16.0
22.0
20.2
Refer to page 48 for Motor Type abbreviations.
Motors manufacturers do not rate single-phase motors for efficiency.
44
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 45.1
Motor Data for Digit 14 = D - 208V/60Hz/3Ph ①
Motor
Digits Size Motor Frame Amp. ServiceWeight Efficiency
17&18 (HP) Type ➁ Size Draw Factor (lbs)
( %)
A1 or L1 1/3
ODP
56
1.5
1.35
17
N/A
A5 or L5 1/3
TE
48
1.2
1.00
15
N/A
B1 or M1 1/2
ODP
56
2.1
1.25
18
N/A
B5 or M5 1/2
TEFC
56
2.1
1.15
18
N/A
C1 or N1 3/4
ODP
56
2.7
1.25
21
N/A
C5 or N5 3/4
TEFC
56
2.7
1.15
30
N/A
D1 or P1 1
ODP
143T 3.1
1.15
40
82.5%
D2 or P2 1
ODP HE 143T 3.2
1.15
30
84.0%
D3 or P3 1 ODP 18/9 143T 3.5/1.5 1.15
26 76.0 / 59.0%
D4 or P4 1 ODP 18/12 145T 3.4/2.0 1.15
42 74.0 / 60.0%
D5 or P5 1
TEFC
56
3.5
1.15
28
N/A
D6 or P6 1
TE HE 143T 3.5
1.15
68
84.5%
D7 or P7 1 TEFC 18/9 143T 3.5/1.5 1.00
29 76.0 / 58.0%
D8 or P8 1 TEFC 18/12 145T 3.2/1.8 1.00
31 74.0 / 60.0%
E1 or Q1 1 1/2
ODP
145T 5.9
1.15
43
80.0%
E2 or Q2 1 1/2
ODP
145T 4.8
1.00
35
89.5%
E3 or Q3 1 1/2 ODP 18/9 145T 5.0/2.1 1.15
29 80.0 / 65.0%
E4 or Q4 1 1/2 ODP 18/12 145T 5.0/2.9 1.15
49 80.0 / 71.0%
E5 or Q5 1 1/2
TEFC
56
4.8
1.15
33
N/A
E6 or Q6 1 1/2 TE HE 145T 4.9
1.15
62
84.0%
E7 or Q7 1 1/2 TEFC 18/9 145T 4.3/1.9 1.00
38 83.0 / 71.0%
E8 or Q8 1 1/2 TEFC 18/12 145T 5.0/2.9 1.00
38 80.0 / 72.0%
F1 or R1 2
ODP
145T 7.2
1.15
43
82.0%
F2 or R2 2
ODP
145T 5.8
1.00
74
89.5%
F3 or R3 2 ODP 18/9 145T 6.2/2.6 1.15
33 81.0 / 67.0%
F4 or R4 2 ODP 18/12 182T 6.5/3.5 1.15
78 81.0 / NA%
F5 or R5 2
TE
145T 7.0
1.15
52
84.0%
F6 or R6 2
TE HE 145T 6.5
1.15
66
86.5%
F7 or R7 2 TEFC 18/9 145T 6.4/2.5 1.00
41 84.0 / 70.0%
F8 or R8 2
TE 18/12 182T 6.4/3.9 1.15
65 84.0 / 77.0%
G1 or S1 3
ODP
182T 10.0
1.15
78
81.5%
G2 or S2 3
ODP HE 182T 8.9
1.15
83
89.5%
G3 or S3 3 ODP 18/9 182T 10.1/4.1 1.15
66 82.0 / 72.0%
G4 or S4 3 ODP 18/12 184T 9.3/4.9 1.15
79 81.0 / 75.0%
G5 or S5 3
TE
182T 10.0
1.15
83
87.5%
G6 or S6 3
TE HE 182T 9.4-9.1 1.15
92
88.5%
G7 or S7 3
TE 18/9 182T 9.3/3.5 1.00
64 84.0 / 70.0%
G8 or S8 3
TE 18/12 184T 9.2/5.4 1.15
84 84.0 / 82.0%
H1 or T1 5
ODP
184T 16.0
1.15
76
84.0%
H2 or T2 5
ODP HE 182T 15.7
1.15
94
89.5%
H3 or T3 5 ODP 18/9 184T 16.0/6.2 1.15
81 85.0 / 77.0%
H4 or T4 5 ODP 18/12 215T 16.0/9.7 1.15
117 86.0 / 78.0%
H5 or T5 5
TE
184T 14.2
1.15
90
87.5%
H6 or T6 5
TE HE 184T 15.0
1.15
99
88.5%
H7 or T7 5
TE 18/9 184T 15.0/5.3 1.00
85 85.0 / 85.0%
H8 or T8 5
TE 18/12 213T 15.0/8.5 1.15
107 85.0 / 80.0%
I1 or W1 7 1/2
ODP
213T 26.9
1.15
106
81.5%
①
②
Motor
Digits Size Motor Frame Amp. ServiceWeight Efficiency
17&18 (HP) Type ➁ Size Draw Factor (lbs)
(%)
I2 or W2 7 1/2 ODP HE 213T 22.3
1.15
141
91.7%
I3 or W3 7 1/2 ODP 18/9 213T 23.0/9.3 1.15
108 85.0 / 72.0%
I4 or W4 7 1/2 ODP 18/12 215T 22.0/12.3 1.15
167 89.0 / 85.0%
I5 or W5 7 1/2
TE
213T 24.0
1.15
126
89.5%
I6 or W6 7 1/2 TE HE 213T 22.0
1.15
158
90.2%
I7 or W7 7 1/2 TE 18/9 213T 21.0/8.8 1.15
106 87.0 / 75.0%
I8 or W8 7 1/2 TE 18/12 215T 21.8/12.0 1.15
124 86.0 / 80.0%
J1 or X1 10
ODP
215T 32.6
1.15
120
84.0%
J2 or X2 10 ODP HE 215T 29.0
1.15
126
91.7%
J3 or X3 10 ODP 18/9 215T 27.7/11.2 1.15
118 88.0 / 77.0%
J4 or X4 10 ODP 18/12 256T 27.0/14.5 1.15
196 88.0 / 80.0%
J5 or X5 10
TE
215T 29.0
1.15
130
87.5%
J6 or X6 10
TE HE 215T 27.6
1.15
200
90.2%
J7 or X7 10
TE 18/9 215T 29.0/11.5 1.15
118 87.0 / 77.0%
J8 or X8 10 TE 18/12 254T 30.0/17.0 1.15
212 88.0 / 80.0%
K1 or Y1 15
ODP
254T 45.6
1.15
147
87.5%
K2 or Y2 15 ODP HE 254T 43.4
1.15
220
93.0%
K3 or Y3 15 ODP 18/9 256T 42.5/16.5 1.15
244 90.2 / 84.0%
K5 or Y5 15
TE
254T 42.0
1.15
250
91.0%
K6 or Y6 15
TE HE 254T 40.3
1.15
259
91.7%
K7 or Y7 15
TE 18/9 256T 44.0/16.0 1.15
218 88.0 / 82.0%
K8 or Y8 15 TE 18/12 256T 42.0/23.0 1.15
219 88.0 / 84.0%
V1 or Z1 20
ODP
256T 61.6
1.15
200
87.5%
V2 or Z2 20 ODP HE 256T 57.0
1.15
250
93.6%
V3 or Z3 20 ODP 18/9 284T 56.0/21.0 1.15
221 90.2 / 82.5%
V4 or Z4 20 ODP 18/12 286T 54.0/28.0 1.15
270 89.0 / 86.0%
V6 or Z6 20
TE HE 256T 54.0
1.15
290
91.7%
V7 or Z7 20
TE 18/9 284T 59.0/20.0 1.15
346 89.0 / 88.0%
Motors have no thermal overload.
Refer to page 48 for Motor Type abbreviations.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
45
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 46.1
Motor Data for Digit 14 = E - 230V/60Hz/3Ph ①
Motor
Digits Size Motor Frame Amp. ServiceWeight Efficiency
17&18 (HP) Type ➁ Size Draw Factor (lbs)
(%)
A1 or L1 1/3
ODP
56
1.6
1.35
17
N/A
A5 or L5 1/3
TE
48
1.2
1.00
15
N/A
B1 or M1 1/2
ODP
56
2.2
1.25
18
N/A
B5 or M5 1/2
TEFC
56
2.2
1.15
18
N/A
C1 or N1 3/4
ODP
56
2.8
1.25
21
N/A
C5 or N5 3/4
TEFC
56
2.8
1.15
30
N/A
D1 or P1 1
ODP
143T
3.1
1.15
36
82.5%
D2 or P2 1
ODP HE 143T
3.2
1.15
30
84.0%
D3 or P3 1 ODP 18/9 143T 3.4/1.6 1.15
26 76.0 / 59.0%
D4 or P4 1 ODP 18/12 145T 3.4/2.2 1.15
42 74.0 / 60.0%
D5 or P5 1
TEFC
56
3.6
1.15
28
N/A
D6 or P6 1
TE HE 143T
3.0
1.15
68
85.5%
D7 or P7 1 TEFC 18/9 143T 3.4/1.6 1.00
29 76.0 / 58.0%
D8 or P8 1 TEFC 18/12 145T 3.4/2.2 1.00
31 74.0 / 60.0%
E1 or Q1 1 1/2
ODP
145T
4.4
1.15
42
84.0%
E2 or Q2 1 1/2
ODP
145T
5.6
1.00
35
89.5%
E3 or Q3 1 1/2 ODP 18/9 145T 4.8/2.7 1.15
29 80.0 / 65.0%
E4 or Q4 1 1/2 ODP 18/12 145T 4.9/2.8 1.15
49 80.0 / 71.0%
E5 or Q5 1 1/2
TEFC
56
4.8
1.15
33
N/A
E6 or Q6 1 1/2 TE HE 145T
5.0
1.15
62
86.5%
E7 or Q7 1 1/2 TEFC 18/9 145T 4.0/1.7 1.00
38 83.0 / 71.0%
E8 or Q8 1 1/2 TEFC 18/12 145T 4.9/2.8 1.00
38 80.0 / 72.0%
F1 or R1 2
ODP
145T
5.8
1.15
43
84.0%
F2 or R2 2
ODP
145T
5.8
1.00
74
89.5%
F3 or R3 2 ODP 18/9 145T 6.4/2.7 1.15
33 81.0 / 67.0%
F4 or R4 2 ODP 18/12 182T 6.3/3.5 1.15
78 81.0 / NA%
F5 or R5 2
TE
145T
5.8
1.15
52
84.0%
F6 or R6 2
TE HE 145T
6.0
1.15
64
85.5%
F7 or R7 2 TEFC 18/9 145T 6.4/2.6 1.00
41 84.0 / 70.0%
F8 or R8 2
TE 18/12 182T 6.4/4.2 1.15
65 84.0 / 77.0%
G1 or S1 3
ODP
182T
9.4
1.15
81
86.5%
G2 or S2 3
ODP HE 182T
8.6
1.15
74
89.5%
G3 or S3 3 ODP 18/9 182T 11.6/4.4 1.15
66 82.0 / 72.0%
G4 or S4 3 ODP 18/12 184T 8.5/4.6 1.15
79 81.0 / 75.0%
G5 or S5 3
TE
182T
8.2
1.15
83
87.5%
G6 or S6 3
TE HE 182T
8.0
1.15
110
89.5%
G7 or S7 3
TE 18/9 182T 10.0/3.6 1.00
64 84.0 / 70.0%
G8 or S8 3
TE 18/12 184T 8.8/5.5 1.15
84 84.0 / 82.0%
H1 or T1 5
ODP
184T 14.0
1.15
87
87.5%
H2 or T2 5
ODP HE 184T 13.6
1.15
94
89.5%
H3 or T3 5 ODP 18/9 184T 17.7/6.2 1.15
81 85.0 / 77.0%
H4 or T4 5 ODP 18/12 215T 15.5/10.2 1.15
117 86.0 / 78.0%
H5 or T5 5
TE
184T 13.0
1.15
90
87.5%
H6 or T6 5
TE HE 184T 13.0
1.15
117
90.2%
H7 or T7 5
TE 18/9 184T 16.0/5.3 1.00
85 85.0 / 85.0%
H8 or T8 5
TE 18/12 213T 14.0/8.8 1.15
107 85.0 / 80.0%
①
②
Motors have no thermal overload.
Refer to page 48 for Motor Type abbreviations.
46
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Motor
Digits Size Motor Frame Amp. ServiceWeight Efficiency
17&18 (HP) Type ➁ Size Draw Factor (lbs)
(%)
I1 or W1 7 1/2
ODP
213T 19.6
1.15 121
88.5%
I2 or W2 7 1/2 ODP HE 213T 19.4
1.15 160
91.7%
I3 or W3 7 1/2 ODP 18/9 213T 22.5/8.2 1.15 108 85.0 / 72.0%
I4 or W4 7 1/2 ODP 18/12 215T 19.5/12.3 1.15 167 89.0 / 85.0%
I5 or W5 7 1/2
TE
213T 20.0
1.15 126
89.5%
I6 or W6 7 1/2 TE HE 213T 19.2
1.15 194
91.7%
I7 or W7 7 1/2 TE 18/9 213T 21.0/8.8 1.15 106 87.0 / 75.0%
I8 or W8 7 1/2 TE 18/12 215T 20.0/12.4 1.15 124 86.0 / 80.0%
J1 or X1 10
ODP
215T 26.8
1.15 138
89.5%
J2 or X2 10 ODP HE 215T 25.2
1.15 220
91.7%
J3 or X3 10 ODP 18/9 215T 32.4/11.6 1.15 118 88.0 / 77.0%
J4 or X4 10 ODP 18/12 256T 24.0/13.0 1.15 196 88.0 / 80.0%
J5 or X5 10
TE
215T 26.0
1.00 138
89.5%
J6 or X6 10
TE HE 215T 25.0
1.15 213
90.2%
J7 or X7 10 TE 18/9 215T 29.0/11.5 1.15 118 87.0 / 77.0%
J8 or X8 10 TE 18/12 254T 28.0/17.5 1.15 212 88.0 / 80.0%
K1 or Y1 15
ODP
254T 38.6
1.15 215
91.0%
K2 or Y2 15 ODP HE 254T 37.8
1.15 217
93.0%
K3 or Y3 15 ODP 18/9 256T 40.0/17.0 1.15 244 90.2 / 84.0%
K5 or Y5 15
TE
254T 40.0
1.15 250
91.0%
K6 or Y6 15
TE HE 254T 38.0
1.15 322
92.4%
K7 or Y7 15 TE 18/9 256T 39.0/15.0 1.15 218 88.0 / 82.0%
K8 or Y8 15 TE 18/12 256T 38.0/22.0 1.15 219 88.0 / 84.0%
V1 or Z1 20
ODP
256T 50.0
1.15 233
91.0%
V2 or Z2 20 ODP HE 256T 49.0
1.15 250
93.6%
V3 or Z3 20 ODP 18/9 284T 51.0/21.5 1.15 221 90.2 / 82.5%
V4 or Z4 20 ODP 18/12 286T 48.0/26.0 1.15 270 89.0 / 86.0%
V5 or Z5 20
TEFC 256T 51.0
1.15 287
91.0%
V6 or Z6 20
TE HE 256T 48.2
1.15 368
93.0%
V7 or Z7 20 TE 18/9 284T 52.0/18.0 1.15 346 89.0 / 88.0%
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 47.1
Motor Data for Digit 14 = F - 460V/60Hz/3Ph ①
Motor
Digits Size Motor Frame Amp. ServiceWeight Efficiency
17&18 (HP) Type ➁ Size Draw Factor (lbs)
(% )
A1 or L1
A3 or L3
B1 or M1
B5 or M5
C1 or N1
C5 or N5
D1 or P1
D2 or P2
D3 or P3
D4 or P4
D5 or P5
D6 or P6
D7 or P7
D8 or P8
E1 or Q1
E2 or Q2
E3 or Q3
E4 or Q4
E5 or Q5
E6 or Q6
E7 or Q7
E8 or Q8
F1 or R1
F2 or R2
F3 or R3
F4 or R4
F5 or R5
F6 or R6
F7 or R7
F8 or R8
G1 or S1
G2 or S2
G3 or S3
G4 or S4
G5 or S5
G6 or S6
G7 or S7
G8 or S8
H1 or T1
H2 or T2
H3 or T3
H4 or T4
H5 or T5
①
②
1/3
ODP
56
1/3
TE
48
1/2
ODP
56
1/2
TEFC
56
3/4
ODP
56
3/4
TEFC
56
1
ODP
143T
1
ODP HE 143T
1
ODP 18/9 143T
1 ODP 18/12 145T
1
TEFC
56
1
TE HE 143T
1 TEFC 18/9 143T
1 TEFC 18/12 145T
1 1/2
ODP
145T
1 1/2
ODP
145T
1 1/2 ODP 18/9 145T
1 1/2 ODP 18/12 145T
1 1/2
TEFC
56
1 1/2 TE HE 145T
1 1/2 TEFC 18/9 145T
1 1/2 TEFC 18/12 145T
2
ODP
145T
2
ODP
145T
2
ODP 18/9 145T
2 ODP 18/12 182T
2
TE
145T
2
TE HE 145T
2 TEFC 18/9 145T
2
TE 18/12 182T
3
ODP
182T
3
ODP HE 182T
3
ODP 18/9 182T
3 ODP 18/12 184T
3
TE
182T
3
TE HE 182T
3
TE 18/9 182T
3
TE 18/12 184T
5
ODP
184T
5
ODP HE 184T
5
ODP 18/9 184T
5 ODP 18/12 215T
5
TE
184T
0.8
0.6
1.1
1.1
1.4
1.4
1.6
1.5
1.8/0.8
1.7/1.1
1.8
1.5
1.8/0.8
1.7/1.1
2.2
2.4
2.3/1.0
2.4/1.4
2.4
2.5
2.0/0.9
2.5/1.4
2.9
2.9
3.0/1.3
3.0/2.0
2.9
3.0
3.2/1.3
3.1/1.9
4.5
4.3
4.5/1.8
4.6/2.7
4.1
4.0
4.6/1.7
4.3/2.6
7.0
6.8
9.1/3.2
7.1/4.8
6.5
1.35
1.00
1.25
1.15
1.25
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.00
1.00
1.15
1.00
1.15
1.15
1.15
1.15
1.00
1.00
1.15
1.00
1.15
1.15
1.15
1.15
1.00
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
17
15
18
18
21
30
36
30
26
39
28
68
28
31
42
35
29
32
33
62
39
37
43
74
33
61
52
64
42
68
81
74
60
71
83
110
65
73
87
94
94
117
90
N/A
N/A
N/A
N/A
N/A
N/A
82.5%
84.0%
76.0 / 59.0%
74.0 / 60.0%
N/A
85.5%
73.0 / 58.0%
74.0 / 60.0%
84.0%
89.5%
80.0 / 65.0%
75.0 / 71.0%
N/A
86.5%
83.0 / 71.0%
80.0 / 72.0%
84.0%
89.5%
79.0 / 62.0%
80.0 / 70.0%
84.0%
85.5%
84.0 / 70.0%
81.0 / 77.0%
86.5%
89.5%
80.0 / 66.0%
82.5 / NA%
87.5%
89.5%
84.0 / 70.0%
82.5 / 75.5%
87.5%
89.5%
84.0 / 73.0%
78.0 / 71.0%
87.5%
Motor
Digits Size Motor Frame Amp. ServiceWeight Efficiency
17&18 (HP) Type ➁ Size
Draw Factor (lbs)
(%)
H6 or T6
H7 or T7
H8 or T8
I1 or W1
I2 or W2
I3 or W3
I4 or W4
I5 or W5
I6 or W6
I7 or W7
I8 or W8
J1 or X1
J2 or X2
J3 or X3
J4 or X4
J5 or X5
J6 or X6
J7 or X7
J8 or X8
K1 or Y1
K2 or Y2
K3 or Y3
K4 or Y4
K5 or Y5
K6 or Y6
K7 or Y7
K8 or Y8
V1 or Z1
V2 or Z2
V3 or Z3
V4 or Z4
V5 or Z5
V6 or Z6
V7 or Z7
V8 or Z8
5
TE HE
5
TE 18/9
5 TE 18/12
7 1/2
ODP
7 1/2 ODP HE
7 1/2 ODP 18/9
7 1/2 ODP 18/12
7 1/2
TE
7 1/2 TE HE
7 1/2 TE 18/9
7 1/2 TE 18/12
10
ODP
10 ODP HE
10 ODP 18/9
10 ODP 18/12
10
TE
10
TE HE
10 TE 18/9
10 TE 18/12
15
ODP
15 ODP HE
15 ODP 18/9
15 ODP 18/12
15
TE
15
TE HE
15 TE 18/9
15 TE 18/12
20
ODP
20 ODP HE
20 ODP 18/9
20 ODP 18/12
20
TEFC
20
TE HE
20 TE 18/9
20 TE 18/12
184T
184T
213T
213T
213T
213T
215T
213T
213T
213T
215T
215T
215T
215T
256T
215T
215T
215T
254T
254T
254T
256T
256T
254T
254T
256T
256T
256T
256T
256T
286T
256T
256T
284T
284T
6.5
7.0/2.5
6.9/4.1
9.8
9.7
11.8/4.2
10.0/6.0
10.0
9.6
10.0/4.1
10.3/5.6
13.4
12.6
15.0/5.3
12.0/6.3
13.0
12.5
13.0/5.4
13.5/7.5
19.3
18.9
19.3/7.8
18.0/9.5
20.0
19.0
19.5/7.5
19.5/11.0
25.0
24.5
25.2/10.0
24.0/13.0
25.5
24.1
26.0/8.7
24.7/14.0
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.00
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
117
83
107
121
160
125
131
126
194
83
128
138
220
116
192
138
213
107
222
215
217
203
298
250
322
218
223
233
250
208
270
287
368
331
361
90.2%
86.0 / 83.0%
85.0 / 75.5%
88.5%
91.7%
85.0 / 72.0%
87.0 / 80.0%
89.5%
91.7%
84.0 / 74.0%
85.0 / 80.0%
89.5%
91.7%
83.0 / 71.0%
87.0 / 82.0%
89.5%
90.2%
86.5 / 77.0%
87.0 / 82.0%
91.0%
93.0%
88.5 / 81.5%
86.0 / 81.0%
91.0%
92.4%
88.0 / 82.0%
88.0 / 84.0%
91.0%
93.6%
89.5 / 82.5%
90.0 / 84.0%
91.0%
93.0%
89.0 / 88.0%
90.0 / 86.0%
Motors have no thermal overload.
Refer to page 48 for Motor Type abbreviations.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
47
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 48.1
Motor Data for Digit 14 = G - 575V/60Hz/3Ph ➀
Digits
17&18
A5 or L5
B1 or M1
B5 or M5
C1 or N1
C5 or N5
D1 or P1
D5 or P5
D6 or P6
E1 or Q1
E5 or Q5
E6 or Q6
F1 or R1
F5 or R5
F6 or R6
G1 or S1
G5 or S5
G6 or S6
H1 or T1
H5 or T5
H6 or T6
I1 or W1
I5 or W5
I6 or W6
J1 or X1
J5 or X5
J6 or X6
K1 or Y1
K5 or Y5
K6 or Y6
V1 or Z1
V5 or Z5
V6 or Z6
➀
➁
Motor
Size (HP)
Motor
Type ➁
Frame
Size
Amp.
Draw
Service
Factor
Weight
(lbs)
Efficiency
(%)
1/3
1/2
1/2
3/4
3/4
1
1
1
1 1/2
1 1/2
1/12
2
2
2
3
3
3
5
5
5
7 1/2
7 1/2
7 1/2
10
10
10
15
15
15
20
20
20
TEFC
ODP
TEFC
ODP
TEFC
ODP
TEFC
TE HE
ODP
TEFC
TE HE
ODP
TEFC
TE HE
ODP
TEFC
TE HE
ODP
TEFC
TE HE
ODP
TEFC
TE HE
ODP
TE
TE HE
ODP
TE
TE HE
ODP
TEFC
TE HE
56
56
56
56
56
143T
56
143T
145T
145T
145T
145T
145T
145T
182T
182T
182T
184T
184T
184T
213T
213T
213T
215T
215T
215T
254T
254T
254T
256T
256T
256T
0.6
0.9
0.9
0.9
1.1
1.1
1.5
1.2
1.8
2.0
1.7
2.3
2.3
2.4
3.4
3.4
3.2
5.2
5.2
5.2
7.8
8.0
7.6
10.3
10.4
9.6
15.4
16.0
15.2
20.8
20.4
19.5
1.15
1.25
1.15
1.25
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
1.15
16
25
24
28
33
41
28
68
48
72
66
50
65
66
72
98
100
91
89
117
113
142
192
123
154
200
184
250
326
255
287
368
N/A
N/A
N/A
N/A
N/A
82.5%
77.0%
85.5%
84.0%
84.0%
85.5%
84.0%
84.0%
86.5%
86.5%
87.5%
89.5%
87.5%
87.5%
89.5%
88.5%
89.0%
90.2%
89.5%
89.5%
90.2%
91.0%
91.0%
92.4%
91.0%
91.0%
93.0%
Motors have no thermal overload
Motor Type Abbreviations
ODP
Open Drip Proof
ODP HE
Open Drip Proof, High Efficiency
ODP 18/9
Open Drip Proof, 2-speed 1800/900 RPM
ODP 18/12
Open Drip Proof, 2-speed 1800/1200 RPM
TE
Totally Enclosed
TEFC
Totally Enclosed, Fan Cooled
TE HE
Totally Enclosed, High Efficiency
TE 18/9
Totally Enclosed, 2-speed 1800/900 RPM
TE 18/12
Totally Enclosed, 2-speed 1800/1200 RPM
TENV
Totally Enclosed, Non-Ventilating
48
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 49.1
IBG Indoor Gravity Vented Blower Package Unit Dimensions
48.08
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
2.20
Electrical Connection
33.22
3.86
2.00
N (Vent Dia.)
2.00
J Over Roof
L
34.25
k
B (Height Outside)
X
C (Width Outside)
24.00
(Inside)
A
10.26 9.05
2.03
2.00
2.00
2.00
24.00
4.35
(Inside)
Return Air Duct Connection
51.09
5.29
5.29
9.21
5.65 Min. (approx)
H
24.00
(Inside)
G (INSIDE)
2
1
P
9.21
3.00
1.50
S
500 - 800 Model Shown
Figure 49.2
ICG Indoor Gravity Vented Cooling Package Unit Dimensions
48.08
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
Electrical Connection
29.36
36.67
12.67
2.00 2.00
N (Vent Dia.)
Outlet Air
Duct
Connection
F (Height)
(Inside)
X
k
E (Width)
(Inside)
7.65
J Over Roof
L
2.20
34.25
19.23
D
A
24.00
(Inside)
9.21
10.26
2.03
34.27 Min (approx.)
2.00
24.00
4.35
2.00
(Inside)
2.00
Return Air Duct Connection
H
24.00
(Inside)
G (INSIDE)
5.29
5.29
1.50
2
1
P
9.21
3.00
116.98
Table 49.1
IBG/ICG Indoor Gravity Vented Unit Dimensions (All dimensions in Inches)
Dimensions
Model Blower Type Qty. of
Gas
Size
(Digit 16) Furnaces A
B
C
D
E
F
G
H
J
K
L
N
P
S
Conn.
75
All
1
37.75 19.07 15.21 28.75 18.00 25.50 20.02 39.23 32.06 38.37 12.65
5 40.80 87.77
1/2
100/125
All
1
37.75 19.07 17.70 28.75 21.00 25.50 20.02 39.23 34.56 38.37 15.14
6 40.80 87.77
1/2
150/175
All
1
37.75 19.07 21.96 28.75 24.00 25.50 23.99 39.23 38.82 38.37 19.41
7 40.80 87.77
1/2
200/225
All
1
37.75 23.07 24.09 32.75 27.00 30.50 23.99 43.23 40.94 42.37 21.60
7 44.80 87.77 1/2 / 3/4
250/300 E, F, G, or H
1
37.75 23.07 27.13 32.75 30.00 30.50 29.96 43.23 44.05 42.37 24.60 8/10 44.80 87.77
3/4
350/400 E, F, G, or H
1
37.75 23.07 38.63 32.75 42.00 30.50 41.90 43.23 55.57 42.37 36.14 10 44.80 87.77
3/4
500/600
G or H
2
37.75 23.07 27.13 32.75 n/a n/a 29.96 43.23 44.05 42.37 24.60 8/10 44.80 120.90 3/4
700/800
G or H
2
37.75 23.07 38.63 32.75 n/a n/a 41.90 43.23 55.57 42.37 36.14 10 44.80 120.90 3/4
➀
➁
For Right Hand Access Units - Location of electrical connection knock-outs are identical sizes as side electrical connections.
For Left Hand Access Units - Location of electrical connection knock-outs are identical sizes as side electrical connections.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
49
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 50.1
IBG Indoor Gravity Vented Blower Package Unit Dimensions with Blower Type I, J, K, or L
33.22
2.00
3.86
N (Vent Dia.)
W
2.00
47.36
U
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
Electrical Connection
34.00
J Over Roof
L
X Blower Hat
36.68
2.32
34.00
22.90 (Height Outside)
X
C (Width Outside)
42.37
37.84
10.269.05
24.00
(Inside)
Fresh Air
Duct Connection
9.21
2.00
2.00
2.03
2.00
5.65 Min. (approx.)
24.00
Return Air
(Inside)
Duct Connection
74.50
S
1.50
4.35
43.23
24.00
(Inside) 44.80
G (INSIDE)
5.29 9.21
5.29
2
1
1.50
3.00
500 - 800 Model Shown
Figure 50.2
ICG Indoor Gravity Vented Cooling Package Unit Dimensions with Blower Type I, J, K, or L
29.36
36.67
12.67
N (Vent Dia.)
Outlet Air
Duct
Connection
30.5 (Height)
42.37 (Inside)
X
E (Width)
(Inside)
7.65
2.00
2.00
47.36
2X Ø'' 1.06 k.O.
Electrical Connection
2X Ø'' .88 k.O.
Electrical Connection
36.68
2.32
34.00
34.00
19.23
D
37.84
10.26
Fresh Air
Duct Connection
24.00
(Inside)
9.21
2.03
34.27 Min (approx.)
2.00
2.00
2.00
Return Air
Duct Connection
J Over Roof
L
24.00
(Inside)
4.35
24.00 43.23
(Inside) 44.80
G (INSIDE)
5.29 9.21
5.29
1.50
2
1
3.00
152.84
Table 50.1
IBG/ICG Indoor Gravity Vented Unit Dimensions with Blower Type I, J, K, or L (All dimensions in inches)
Model
Size
Dimensions
Blower Type Qty. of
Gas
(Digit 16) Furnaces C
E
G
J
L
N
S
U ➂ W ➂X ➂ Conn.
250/300
I, J, or K
1
27.13 30.00 29.96 44.05 24.60 8/10 123.35 n/a
n/a
n/a
3/4
350/400
I, J, or K
1
38.63 42.00 41.90 55.07 36.14 10 123.35 n/a
n/a
n/a
3/4
500/600
I, J, K, or L
2
27.13 n/a
29.96 44.05 24.60 8/10 156.76 29.74
6.5 41.62 3/4
700/800
I, J, K, or L
2
38.63 n/a
41.90 55.57 36.14 10 156.76 29.74
6.5 41.62 3/4
840/960
I, J, K, or L
3
38.63 n/a
41.90 55.57 36.14 10 185.99 29.74
6.5 41.62 3/4
➀
➁
➂
For Right Hand Access Units - Location of electrical connection knock-outs are identical sizes as side electrical connections.
For Left Hand Access Units - Location of electrical connection knock-outs are identical sizes as side electrical connections.
Applies to units with Digit 16 = L only.
50
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 51.1
IBS Separated Combustion Blower Package Unit Dimensions
Y
34.49
51.15
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
2.00
Electrical Connection
20.00
4.50
J Over Roof
1.90
2.20
ØN5
Exhaust
34.25
B (Height)
x
C (Width)
(Outside)
Ø P5
Combustion
Air Inlet
24.00
(Inside)
A
G INSIDE
24.00
(Inside)
H
L
2
1
10.26 9.05
1
M
2
9.21
2.03
24.92
4.24
7.30
k
2.00
2.00
2.00
24.00
4.35
(Inside)
Return Air Duct Connection
51.09
6.38
5.29
6.38
5.29
1
2
3
9.21
3.00
4
1.50
S
500 - 800 Model Shown
Figure 51.2
ICS Separated Combustion Cooling Package Unit Dimensions
108.94
23.95
33.84
51.15
2.00
20.00
Outlet Air
Duct
Connection
F (Height)
X
E (Width)
(Inside)
10.26
4.50
2X Ø” 1.06 k.O.
Electrical Connection
2X Ø” .88 k.O.
Electrical Connection
J Over Roof
2.20
34.25
ØN
5
Exhaust
Ø P Combustion
Air Inlet 5
19.23
D
1.90
24.00
(Inside)
A
24.00
(Inside)
G INSIDE
L
2
1
7.65
4.24
7.30
k
9.21
2.00
2.00
2.00
24.92
24.00
4.35
(Inside)
Return Air Duct Connection
M
6.38
5.29
H
6.38 9.21
5.29
1
2
3
4
3.00
1.50
111.68
Table 51.1
IBS/ICS Indoor Separated Combustion Unit Dimensions (All dimensions in inches)
Dimensions
Model Blower Type Qty. of
Size
(Digit 16) Furnaces A
B
C
D
E
F
G
H
J
K
L
M N ➄ P ➄
S
Y
75
All
100/125
All
150/175
All
200/225
All
250/300 E, F, G, or H
350/400 E, F, G, or H
500/600
G or H
700/800
G or H
➀
➁
➂
➃
➄
1
1
1
1
1
1
2
2
33.75 18.90 15.18 28.75 18.00
33.75 18.90 17.67 28.75 21.00
33.75 18.90 21.95 28.75 24.00
37.75 22.90 24.05 32.75 27.00
37.75 22.90 27.05 32.75 30.00
37.75 22.90 38.60 32.75 42.00
37.75 22.90 27.05 32.75 n/a
37.75 22.90 38.60 32.75 n/a
25.50
25.50
25.50
30.50
30.50
30.50
n/a
n/a
20.02
20.02
23.99
23.99
29.96
41.90
29.96
41.90
39.23
39.23
39.23
43.23
43.23
43.23
43.23
43.23
32.06 10.26 23.08 18.19
34.56 10.26 23.08 18.19
38.82 10.26 23.08 18.19
40.94 9.60 26.43 19.21
44.05 9.60 26.43 19.21
55.07 9.60 26.43 19.21
44.05 9.60 26.43 19.21
55.57 9.60 26.43 19.21
3.86
3.86
3.86
5.86
5.86
5.86
5.86
5.86
Gas
Conn.
4.17 87.77 85.69
4.17 87.77 85.69
4.17 87.77 85.69
6.18 87.77 85.69
6.18 87.77 85.69
6.18 87.77 85.69
6.18 128.77126.78
6.18 128.77126.78
1/2
1/2
1/2
1/2
3/4
3/4
3/4
3/4
For Right Hand Access Units - Location of 1.06" gas connection knockout - one side of unit and one on bottom.
For Left Hand Access Units - Location of 1.06" gas connection knockout - one side of unit and one on bottom.
For Right Hand Access Units - Location of electrical connection knock-outs are identical sizes as side electrical connections.
For Left Hand Access Units - Location of electrical connection knock-outs are identical sizes as side electrical connections.
Nominal vent pipe size is 4" (Models 75-175) and 6" (Models 200-800). Exhaust pipe installed over collar. Combustion air pipe installed collar.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
51
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 52.1 - IBS Separated Combustion Blower Package Unit Dimensions with Blower Type I, J, K, or L
J Over Roof
1.90
Y
50.37
34.49
36.68
U
2.00
W
20.00
X
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
Electrical Connection
4.50
2.32
34.00
22.90
(Height)
X
C (Width)
(Inside)
Ø 6.18 5
24.00 Combustion
(Inside) Air Inlet
26.43
Fresh Air
Duct Connection 19.21
6.38
9.21
5.29
37.84
1
10.26 9.05
Ø 5.86 5
Exhaust
34.00
2
2
1
4.24
2.00
2.00
2.03
24.92
2.00
7.30
9.60
24.00
(Inside)
Return Air
Duct Connection
74.50
4.35
1.50
24.00
(Inside)
43.23
G INSIDE
6.38 9.21
5.29
1
2
3
3.00
4
S
500 - 800 Model Shown
Figure 52.2 - ICS Separated Combustion Cooling Package Unit Dimensions with Blower Type I, J, or K
144.84
33.84
23.95
50.37
2X Ø” 1.06 k.O.
Electrical Connection
2X Ø ” .88 k.O.
Electrical Connection
2.00
20.00
Outlet Air
Duct
Connection
30.5
X
E (Width)
(Inside)
J Over Roof
2.32
34.00
34.00
4.50
19.23
36.68
32.75
37.85
1
10.26 7.65
4.24
7.30
9.60
2
24.92
24.00
(Inside)
9.21
2.03
2.00
2.00
2.00
147.26
24.00
Return Air
(Inside)
Duct Connection
1.90
Ø 5.386
Exhaust ➄
Ø 6.18
Combustion
Air Inlet ➄
24.00
(Inside)
43.23
G INSIDE
26.43
19.21
Fresh Air
6.38
Duct Connection 5.29
4.35
1.50
6.38 9.21
5.29
1
3
2
Table 52.1 - IBS/ICS Indoor Separated Combustion Unit Dimensions with Blower I, J, K, or L
(All dimensions in inches)
Dimensions
Model Blower Type Qty. of
Size
(Digit 16) Furnaces C
E
G
J
S
U ➅ W ➅X ➅
Y
Gas
Conn.
250/300
I, J, or K
1
27.05 30.00 29.96 44.05123.63 n/a
n/a
n/a 121.53
3/4
350/400
I, J, or K
1
38.60 42.00 41.90 55.07123.63 n/a
n/a
n/a 121.53
3/4
500/600 I, J, K, or L
2
27.05
n/a
29.96 44.05164.63 29.74 6.50 41.62 147.55
3/4
700/800 I, J, K, or L
2
38.60
n/a
41.90 55.57164.63 29.74 6.50 41.62 147.55
3/4
840/960 I, J, K, or L
3
38.60
n/a
41.90 55.57205.77 29.74 6.50 41.62 203.67
3/4
➀
➁
➂
➃
➄
➅
For Right Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Left Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Right Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
For Left Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
Nominal vent pipe size is 4" (Models 75-175) and 6" (Models 200-800). Exhaust pipe installed over collar. Combustion air pipe installed collar.
Applies to units with Digit 16 = L only.
52
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
4
3.00
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 53.1
OBG/OBP Outdoor Blower Package Unit Dimensions
Y
33.50
B
C
33.50
B
C
48.00
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
Electrical Connection
D
(Max.)
2.00
E (Height)
X
F (Width)
(Inside)
Q
1.45
24.00
(Inside)
1.45
24.00
(Inside) N
k Inside
A
10.26
Fresh Air
Duct Connection
9.21
4.29
16.73
2
1
2.56
4.16
1.72
3.00
9.00
Optional Rainhood
& Birdscreen
2.32
34.25
9.50
R
P Over Roof
P/2
24.94
2
1
3
2.03
2.00
24.00
2.00
4.35
2.00
(Inside)
Return Air Duct Connection
4
1
2
1.50
5.29
9.21
6.28
6.28
1.50
3.00
5.29
S
500 - 800 Model Shown
Figure 53.2
ODG/ODP Outdoor Downturn Package Unit Dimensions
Z
29.32
33.50
B
C
33.50
B
C
48.00
P/2
D
(Max.)
2.00
9.50
24.53
R
2X Ø 1.06 k.O.
Electrical Connection
2.32
2X Ø .88 k.O.
Electrical Connection
Downturn
Duct
Connection
4.27
34.00
A
4.29
16.73
24.94
1
1
2
4.16
24.00
(Inside)
9.21
2
2.56
Q
10.26
24.00
(Inside)
Optional Rainhood
& Birdscreen
1.45
1.72
3.00
1.45
P Over Roof
24.00
(Inside) N
k Inside
Fresh Air
Duct Connection
2.00 2.03
2.00
24.00
2.00
(Inside) 4.35
Return Air Duct Connection
4
1
3
9.21
2
1.50
1.50
5.29
5.29
6.28
T
3.00
6.28
500 - 800 Model Shown
Table 53.1
OBG/OBP/ODG/ODP Outdoor Unit Dimensions (All dimensions in inches)
Dimensions
Model Blower Type Qty. of
Size
(Digit 16) Furnaces A
B ➄ C ➄ D ➄
E
F
K
N
P Q ➄ R ➄ S
T
Y
Z
75
All
100/125
All
150/175
All
200/225
All
250/300 E, F, G, or H
350/400 E, F, G, or H
500/600
G or H
700/800
G or H
➀
➁
➂
➃
➄
1
1
1
1
1
1
2
2
33.75
33.75
33.75
37.75
37.75
37.75
37.75
37.75
19.22 8.62
19.22 8.62
19.22 8.62
19.22 8.62
21.31 10.62
24.64 12.62
21.31 10.62
24.64 12.62
14.07
14.07
14.07
14.07
15.05
18.25
15.05
18.25
18.98
18.98
18.98
22.98
22.98
22.98
22.98
22.98
15.18
17.69
21.94
24.06
27.09
38.60
27.09
38.60
20.02
20.02
23.99
23.99
29.96
41.90
29.96
41.90
39.23
39.23
39.23
43.23
43.23
43.23
43.23
43.23
32.06 10.75 7.00 84.41 108.39 81.49 110.82
34.56 10.75 7.00 84.41 108.39 81.49 110.82
38.82 10.75 7.00 84.41 108.39 81.49 110.82
40.94 11.58 9.90 84.41 108.39 81.49 110.82
44.05 11.58 9.90 84.41 108.39 81.49 110.82
55.07 11.58 9.90 84.41 108.39 81.49 110.82
44.05 11.58 9.90117.53 146.77 114.94 144.12
55.07 11.58 9.90117.53 146.77 114.94 144.12
Gas
Conn.
1/2
1/2
1/2
1/2
3/4
3/4
3/4
3/4
For Right Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Left Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Right Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
For Left Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
For Gravity Vented Models, the combustion air/vent cap is required so only dimensions B, C and D apply. For Power Vented Models,
the power exhauster discharge cover and inlet louvers are included so only dimensions Q and R apply.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
53
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 54.1 - OBG/OBP Outdoor Blower Package Unit Dimensions with Blower Type I, J, K, or L
Y
E
47.27
B
C
P Over Roof
36.58
P/2
6
41.62
29.74
2.00
2X Ø 1.06 k.O.
Electrical Connection
6.56 2X Ø .88 k.O.
Electrical Connection
D
(Max.)
34.00
34.00
9.50
22.98 (Height)
X
F (Width)
(Inside)
Q
1.45
4.16
1.72
R3.00
1.45
37.85
24.00
(Inside)
10.26
9.00
9.21
4.29
16.73
2
1
1
Optional Rainhood
& Birdscreen
2.32
2.00
2.00 2.03
2.00
24.94
2
Fresh Air
Duct Connection
4
1
3
24.00
(Inside)
Return Air
Duct Connection
4.35
24.00
(Inside)43.23
k Inside
2.56
9.21
3.00
1.50
5.29
6.28
2
1.50
5.29
6.28
S
500 - 800 Model Shown
Figure 54.2 - ODG/ODP Outdoor Downturn Package Unit Dimensions with Blower Type I, J, K, or L
Z
E
29.32
B
C
29.74
2.00
D
(Max.)
6.56
9.50
24.53
2X Ø 1.06 k.O.
Electrical Connection
4.27
2.32
2X Ø .88 k.O.
Electrical Connection
34.00
Q
34.00
4.16
37.85
10.26
1
1
24.00
(Inside)
9.21
2
24.00
(Inside)
4.29
16.73
24.94
Optional Rainhood
& Birdscreen
1.45
1.72
R 3.00
1.45
Downturn
Duct
Connection
P Over Roof
P/2
6
41.62
36.58
47.27
2.00
2.00 2.03
2.00
2
Fresh Air
Duct Connection
4.35
4
1
3
24.00
Return Air
(Inside)
Duct Connection
24.00
(Inside)43.23
k Inside
2.56
1.50
5.29
6.28
2
9.21
3.00
1.50
5.29
6.28
T
500 - 800 Model Shown
Table 54.1 - OBG/OBP/ODG/ODP Outdoor Unit Dimensions with Blower I, J, K, or L (All dimensions in inches)
Model
Size
Dimensions
Blower Type Qty. of
(Digit 16) Furnaces B ➄ C ➄ D ➄
E
F
K
P
Q ➄ R ➄
S
T
Y
Z
Gas
Conn.
250/300
I, J, or K
1
21.31 10.62 15.05 33.50 27.09 29.96 44.05 11.58 9.90 120.00 141.34 117.34 141.34
3/4
350/400
I, J, or K
1
24.64 12.62 18.25 33.50 38.60 41.90 55.57 11.58 9.90 120.00 141.34 117.34 141.34
3/4
500/600
I, J, K, or L
2
21.31 10.62 15.05 67.00 27.09 29.96 44.05 11.58 9.90 153.12 182.36 150.74 180.00
3/4
700/800
I, J, K, or L
2
24.64 12.62 18.25 67.00 38.60 41.90 55.57 11.58 9.90 153.12 182.36 150.74 180.00
3/4
840/960
I, J, K, or L
3
24.64 12.62 18.25 100.50 38.60 41.90 55.57 11.58 9.90 186.52 215.77 184.14 213.40
3/4
➀
➁
➂
➃
➄
➅
For Right Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Left Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Right Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
For Left Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
For Gravity Vented Models, the combustion air/vent cap is required so only dimensions B, C and D apply. For Power Vented Models,
the power exhauster discharge cover and inlet louvers are included so only dimensions Q and R apply.
Applies to units with Digit 16 = L only.
54
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 55.1
OCG/OCP Outdoor Cooling Package Unit Dimensions
105.49
48.00
33.50
24.00
B
P Over Roof
P/2
C
D (Max.)
2.00
Optional Rainhood
& Birdscreen
2.20
2.56
Q
34.25
9.50
Outlet Air
Duct
Connection
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
Electrical Connection
19.23
J (Height)
X
H (Width)
(Inside)
4.16
1.45
G
R
1.45
A
3.00
1.72
? 10.26
7.65
2.03
?
9.21
2.00
24.00
2.00
(Inside)
2.00
Return Air
Duct Connection
16.75
24.94
4.29
24.00
(Inside)
108.39
24.00
(Inside) N
k Inside
Fresh Air
Duct Connection
?
?
4.35
9.21
?
?
1.50
1.50
3.00
5.29
5.29
6.28
6.28
Figure 55.2
OPG/OPP Outdoor Packaged Unit Dimensions
134.82
48.00
33.50
B
C
24.00
29.32
D (Max.)
2.00
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
Electrical Connection
19.23
G
4.27
A
2.03
16.75
4.29
24.94
2.56
4.16
1.45
3.00
1.72
? 10.26
24.00
(Inside)
2.20
Q
R
1.45
Downturn
Duct
Connection
Optional Rainhood
& Birdscreen
34.25
9.50
24.53
P Over Roof
P/2
?
24.00
(Inside)
9.21
2.00
2.00
2.00
24.00
(Inside)
Return Air
Duct Connection
24.00
(Inside)
k Inside
Fresh Air
Duct Connection
➂
4.35
➃
➀
9.21
➁
1.50
1.50
5.29
3.00
5.29
6.28
137.63
N
6.28
Table 55.1
OCG/OCP/OPG/OPP Outdoor Unit Dimensions (All dimensions in inches)
Model
Size
Dimensions
Blower Type
Gas
(Digit 16)
A
B ➄ C ➄ D ➄
G
H
J
K
N
P
Q ➄ R ➄ Conn.
75
All
33.75 19.22 8.62 14.07 28.75 18.00 25.50 20.02 39.23 32.06 10.75 7.00
1/2
100/125
All
33.75 19.22 8.62 14.07 28.75 21.00 25.50 20.02 39.23 34.56 10.75 7.00
1/2
150/175
All
33.75 19.22 8.62 14.07 28.75 24.00 25.50 23.99 39.23 38.82 10.75 7.00
1/2
200/225
All
37.75 19.22 8.62 14.07 32.75 27.00 30.50 23.99 43.23 40.94 11.58 9.90
1/2
250/300 E, F, G, or H 37.75 21.31 10.62 15.05 32.75 30.00 30.50 29.96 43.23 44.05 11.58 9.90
3/4
350/400 E, F, G, or H 37.75 24.64 12.62 18.25 32.75 42.00 30.50 41.90 43.23 55.57 11.58 9.90
3/4
➀
➁
➂
➃
➄
For Right Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Left Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Right Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
For Left Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
For Gravity Vented Models, the combustion air/vent cap is required so only dimensions B, C and D apply. For Power Vented Models,
the power exhauster discharge cover and inlet louvers are included so only dimensions Q and R apply.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
55
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 56.1 - OCG/OCP Outdoor Cooling Package Unit Dimensions with Blower Type I, J, or K
141.34
24.00
33.50
B
C
P/2
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
Electrical Connection
D (Max.)
2.00
Outlet Air
Duct
Connection
19.23
30.5 (Height)
X
H (Width)
(Inside)
36.58
47.27
34.00
9.50
2.32
1.45
7.65
2.56
Q
4.16
R
24.00
(Inside)
37.85
24.00
(Inside)
k Inside
N
3.00
1.72
? 10.26
9.21
?
2.00 2.03
2.00
Return Air
2.00
Duct Connection
4.29
Optional Rainhood
& Birdscreen
34.00
1.45
32.68
P Over Roof
16.73
24.94
24.00
(Inside)
Fresh Air
Duct Connection
➂
4.35
➃
➀
9.21
➁
1.50
5.29
6.28
143.98
3.00
1.50
5.29
6.28
Figure 56.2 - OPG/OPP Outdoor Packaged Unit Dimensions with Blower Type I, J or K
170.66
29.32
33.50
B
C
24.00
47.27
2.00
9.50
2.32
R
Q
37.85
2.56
4.16
24.00
(Inside)
N
10.26
?
2.00
2.03
2.00
Return Air
2.00
Duct Connection
24.00
(Inside)
16.73
9.21
24.94
24.00
(Inside)
Fresh Air
Duct Connection
1.50
1.50
5.29
Dimensions
Blower Type
Gas
(Digit 16) B ➄ C ➄ D ➄
F
H
K
N
P
Q ➄ R ➄ Conn.
250/300
I, J, or K
21.31 10.62 15.05 27.09 30.00 29.96 43.23 44.05 11.58 9.90
3/4
I, J, or K
24.64 12.62 18.25 38.60 42.00 41.90 43.23 55.07 11.58 9.90
3/4
For Right Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Left Hand Access Units - Location of 1.06" gas connection knock-out - one side of unit and one on bottom.
For Right Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
For Left Hand Access Units - Location of electrical connection, knock-outs are identical sizes as side electrical connections.
For Gravity Vented Models, the combustion air/vent cap is required so only dimensions B, C and D apply. For Power Vented Models,
the power exhauster discharge cover and inlet louvers are included so only dimensions Q and R apply.
56
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
3.00
5.29
6.28
173.22
350/400
➀
➁
➂
➃
➄
9.21
➁
➂
4.35
➃
➀
Table 56.1 - OCG/OCP/OPG/OPP Outdoor Unit Dimensions (All dimensions in inches)
Model
Size
24.00
(Inside)
k Inside
3.00
1.72
?
4.29
Optional Rainhood
& Birdscreen
34.00
1.45
1.45
4.27
2X Ø 1.06 k.O.
Electrical Connection
2X Ø .88 k.O.
Electrical Connection
34.00
19.23
32.68
Downturn
Duct
Connection
P Over Roof
P/2
D (Max.)
24.53
36.58
6.28
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 57.1
Unit Base Dimensions
A
C To end of unit
0.63
M
0.75" Suspension
Hanging Locations
(Typical 4 Corners)
2.36
B
J
E Inside
Suspension
Point
24.00 Inside
Suspension
Point
Lifting
Point
Lifting
Point
M
D
Return Air
Opening
K
4.35
1.45
L
N
Table 57.1
Indoor Gravity Vented and Separated Combustion Blower Package Units (All Indoor System Units)
Model
Blower Type
IBG
Size
75
100/125
150/175
200/225
250/300
250/300
350/400
350/400
500/600
500/600
700/800
700/800
840/960
(Digit 16)
A
C
All
All
All
All
E,F,G, or H
I, J, or K
E,F,G, or H
I, J, or K
G, or H
I, J, K, or L
G, or H
I, J, K, or L
I, J, K, or L
87.77
87.77
87.77
87.77
87.77
123.35
87.77
123.35
120.90
156.76
120.90
156.76
185.99
D
N
Dimensions
IBS
K
L
A
C
D
IBG & IBS
N
K
L
B
E
81.30
87.77 84.73
34.85
81.30
87.77 84.73
37.36
81.30
87.77 84.73
41.61
81.30
87.77 84.73
43.71
81.30
87.77 84.73
46.75
117.26
123.62 120.57
46.75
81.30
87.77 84.73
58.27
117.26
123.62 120.57
58.27
111.68 34.12 89.14 34.12
128.77 119.54 42.00 97.03 42.00
46.75
147.53 34.12 117.82 82.27
164.63 155.41 42.00 125.70 91.15
46.75
111.68 34.12 89.14 34.12
128.77 119.54 42.00 97.03 42.00
58.27
147.53 34.14 117.82 82.27
164.63 155.41 42.00 125.70 90.15
58.27
176.75 30.31 147.06 63.36 147.06 205.77 196.52 48.58 166.84 82.94 166.8458.27
J
M
19.52 32.00
19.52 34.50
23.49 38.75
23.49 40.85
29.46 43.89
29.46 43.89
41.40 55.41
41.40 55.41
29.46 43.89
29.46 43.89
41.40 55.41
41.40 55.41
41.40 55.41
6.23
7.49
7.63
8.69
7.21
7.21
7.00
7.00
7.21
7.21
7.00
7.00
7.00
Table 57.2
Indoor Gravity Vented and Separated Combustion Cooling Package Units (All Indoor System Units)
Model
Blower Type
ICG
Size
75
100/125
150/175
200/225
250/300
250/300
350/400
350/400
Dimensions
ICS
ICG & ICS
(Digit 16)
A
C
A
C
B
E
F
G
J
M
All
All
All
All
E, F, G, or H
I, J, or K
E, F, G, or H
I, J, or K
116.98
116.98
116.98
116.98
116.98
152.84
116.98
152.84
114.07
114.07
114.07
114.07
114.07
149.93
114.07
149.93
111.75
111.75
111.75
111.75
111.75
147.60
111.75
147.60
108.75
108.75
108.75
108.75
108.75
144.60
108.75
144.60
34.85
37.36
41.61
43.71
46.75
46.75
58.27
58.27
19.52
19.52
23.49
23.49
29.46
29.46
41.40
41.40
81.88
81.88
81.88
81.88
81.88
117.73
81.88
117.73
56.96
56.96
56.96
56.96
56.96
92.81
56.96
92.81
32.00
34.50
38.75
40.85
43.89
43.89
55.41
55.41
6.23
7.49
7.63
8.69
7.21
7.21
7.00
7.00
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
57
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 58.1 - Unit Base Dimensions
A
C To end of Unit
F
G
M
M
6.28
B
J
1.06" Gas Connection
knock Out
Left Hand Access Units
E
Inside
E
Inside
1.06" Gas
Connection
knock Out
Right Hand
Access Units
6.28
M
4.29
Return Air Opening
Supply Air Opening
24.00 Inside
M
H
4.35
24.00 Inside
Table 58.1 - OBG/OBP & ODG/ODP Outdoor Unit Base Rail Dimensions (All dimensions in inches)
Dimensions
Model
Blower TypeOBG/OBPODG/ODPOBG/OBP/ODG/ODP
Size
75
100/125
150/175
200/225
250/300
250/300
350/400
350/400
500/600
500/600
700/800
700/800
840/960
(Digit 16)
All
All
All
All
E,F,G, or H
I, J, or K
E,F,G, or H
I, J, or K
G or H
I, J, K, or L
G or H
I, J, K, or L
I, J, K, or L
A
84.41
84.41
84.41
84.41
84.41
120.00
84.41
120.00
117.53
153.12
117.53
153.12
186.52
C
81.49
81.49
81.49
81.49
81.49
117.34
81.49
117.34
114.94
150.74
114.94
150.74
184.14
A
113.63
113.63
113.63
113.63
113.63
149.22
113.63
149.22
146.77
182.36
146.77
182.36
215.77
C
B
E
110.82
110.82
110.82
110.82
110.82
146.66
110.82
146.66
144.12
180.00
144.12
180.00
213.40
34.85
37.36
41.61
43.71
46.75
46.75
58.27
58.27
46.75
46.75
58.27
58.27
58.27
19.52
19.52
23.49
23.49
29.46
29.46
41.40
41.40
29.46
29.46
41.40
41.40
41.40
F ➀
78.66
78.66
78.66
78.66
78.66
114.23
78.66
114.23
78.66
114.23
78.66
114.23
114.23
G ➀
H
J
M
53.72
53.72
53.72
53.72
53.72
84.29
53.72
82.29
53.72
82.29
53.72
82.29
82.29
1.53
1.53
1.53
1.53
1.53
1.28
1.53
1.28
1.53
1.28
1.53
1.28
1.28
32.00
34.50
38.75
40.85
43.89
43.89
55.41
55.41
43.89
43.89
55.41
55.41
55.41
6.23
7.49
7.63
8.69
7.21
7.21
7.00
7.00
7.21
7.21
7.00
7.00
7.00
Table 58.2 - OCG/OCP & OPG/OPP Outdoor Unit Base Rail Dimensions (All dimensions in inches)
Dimensions
Model
Blower TypeOCG/OCPOPG/OPPOCG/OCP/OPG/OPP
Size
75
100/125
150/175
200/225
250/300
250/300
350/400
350/400
➀
(Digit 16)
All
All
All
All
E,F,G, or H
I, J, or K
E,F,G, or H
I, J, or K
A
C
108.39 105.49
108.39 105.49
108.39 105.49
108.39 105.49
108.39 105.49
143.98 141.34
108.39 105.49
143.98 141.34
A
137.63
137.63
137.63
137.63
137.63
173.22
137.63
173.22
C
B
E
134.82
134.82
134.82
134.82
134.82
170.66
134.82
170.66
34.85
37.36
41.61
43.71
46.75
46.75
58.27
58.27
19.52
19.52
23.49
23.49
29.46
29.46
41.40
41.40
Gas connection for 1st furnace. For Models 500-800 add 33.5” for second furnace gas connection.
For Model 840-960 add 33.50” and 67.00” for second and third furnace gas connections.
58
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
F
78.66
78.66
78.66
78.66
78.66
114.23
78.66
114.23
G
H
J
M
53.72
53.72
53.72
53.72
53.72
82.29
53.72
82.29
1.53
1.53
1.53
1.53
1.53
1.28
1.53
1.28
32.00
34.50
38.75
40.85
43.89
43.89
55.41
55.41
6.23
7.49
7.63
8.69
7.21
7.21
7.00
7.00
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 59.1 - Roof Curb Dimensions
1.75
TYP
E
RG
HA
SC NG
DI ENI
E
P
SID O
IN AIR
H
1.68
24.00 INSIDE
OPENING
G
24
.94
16.00 1.00
TYP
J
5.5
3
GAS LINE CONN.
(LH ASSY ONLY)
5.5
GAS LINE CONN.
(RH ASSY ONLY)
3
D
2.9
N
UR
ET NG
E R ENI
D
I
P
INS IR O
H A
7T
B
YP
SID
E
C
OU
Discharge Air Opening
is for ODG/ODP/OPG/OPP
models only
1.79
G
3
2.0SPAC
0 = ES
6.0 AT
0(
TY
P
IN
A
24.00 INSIDE
OPENING
ELECT. BOTT
PAN CONN.
)
TS
ID
E
44
.16
E
E
ID
SID UTS
O
E
N
F I
Table 59.1 - OBG/OBP & ODG/ODP Roof Curb Dimensions (All dimensions in inches)
Model
Blower Type
OBG/OBP
Size
75
100/125
150/175
200/225
250/300
250/300
350/400
350/400
500/600
500/600
700/800
700/800
840/960
(Digit 16)
A
All
All
All
All
E,F,G, or H
I, J, or K
E,F,G, or H
I, J, or K
G or H
I, J, K, or L
G or H
I, J, K, or L
I, J, K, or L
88.77
88.77
88.77
88.77
88.77
124.61
88.77
124.61
121.89
157.74
121.89
157.74
191.14
B
C
76.77
-
76.77
-
76.77
-
76.77
-
76.77
-
112.61
-
76.77
-
112.61
-
109.89
-
145.74 105.98
109.89
-
145.74 105.98
179.14 105.98
Dimensions
ODG/ODP
OBG/OBP/ODG/ODP
D
A
B
C
D
E
F
G
H
J➀
-
-
-
-
-
-
-
-
-
39.76
-
39.76
73.16
117.98
117.98
117.98
117.98
117.98
153.83
117.98
153.83
151.10
186.98
151.10
186.98
220.39
105.98
105.98
105.98
105.98
105.98
141.63
105.98
141.63
139.10
174.98
139.10
174.98
208.39
-
-
-
-
-
105.98
-
105.98
105.98
105.98
105.98
105.98
105.98
-
-
-
-
-
35.85
-
35.85
33.12
69.00
33.12
69.00
102.41
39.33
41.84
46.18
48.22
51.25
51.25
62.76
62.76
51.25
51.25
62.76
62.76
62.76
27.33
29.84
34.18
36.22
39.25
39.25
50.76
50.76
39.25
39.25
50.76
50.76
50.76
3.97
5.22
5.41
6.43
4.96
4.96
4.74
4.74
4.96
4.96
4.74
4.74
4.74
19.52
19.52
23.49
23.49
29.46
29.46
41.40
41.40
29.46
29.46
41.40
41.40
41.40
74.84
74.84
74.84
74.84
74.84
110.41
74.84
110.41
74.84
110.41
74.84
110.41
110.41
Table 59.2 - OCG/OCP & OPG/OPP Roof Curb Dimensions (All dimensions in inches)
Model
Blower Type
OCG/OCP
Size
75
100/125
150/175
200/225
250/300
250/300
350/400
350/400
➀
(Digit 16)
A
All
All
All
All
E,F,G, or H
I, J, or K
E,F,G, or H
I, J, or K
112.74
112.74
112.74
112.74
112.74
148.59
112.74
148.59
B
C
100.74
-
100.74
-
100.74
-
100.74
-
100.74
-
136.59 105.98
100.74
-
136.59 105.98
Dimensions
OPG/OPP
OCG/OCP/OPG/OPP
D
A
B
C
D
E
F
G
H
J
-
-
-
-
-
30.61
-
30.61
141.98
141.98
141.98
141.98
141.98
177.83
141.98
177.83
129.98
129.98
129.98
129.98
129.98
165.83
129.98
165.83
100.74
100.74
100.74
100.74
100.74
105.98
100.74
105.98
29.24
29.24
29.24
29.24
29.24
59.85
29.24
59.85
39.33
41.84
46.18
48.22
51.25
51.25
62.76
62.76
27.33
29.84
34.18
36.22
39.25
39.25
50.76
50.76
3.97
5.22
5.41
6.43
4.96
4.96
4.74
4.74
19.52
19.52
23.49
23.49
29.46
29.46
41.40
41.40
74.84
74.84
74.84
74.84
74.84
110.41
74.84
110.41
Gas connection for 1st furnace. For Models 500-800 add 33.5” for second furnace gas connection.
For Model 840-960 add 33.50” and 67.00” for second and third furnace gas connections.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
59
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 60.1
Rainhood and Birdscreen Dimensions (Outdoor Only)
(All dimensions in inches)
Figure 60.1
Rainhood and Birdscreen Dimensions (Outdoor Only)
1.14
42.66 Approx.
A
1.14
1.09
Rainhood & Birdscreen
Model Size
A
75
31.19
32.71
44.56
.75
29.43
100/125
31.94
150/175
38.24
200/225
38.24
250/300
41.34
350/400
52.85
500/600
41.34
700/800
52.85
840/960
52.85
Custom Remote Monitoring Panels
Custom remote monitoring panels are available with any combination of light, switch, and/or thermostat panels. Specify the number
of lights, switches, and/or thermostat as desired. All lights and switches must be tagged only with the listed tags.
Available Light Tags
Heat On
Evap On
Blower On
Smoke Alarm
Blower On (High)
Power On
Figure 60.2
Remote Panel Dimensions
C
Blower On (Low)
1.50
Dirty Filters
Cool On
5.57
Available Switch Tags
2 Position Tags
3 Position Tags
Day/Night
Heat/Vent/Cool
Occupied/Unoccupied
Summer/Off/Winter
On/Off
Heat/Off/Vent
Heat/Off
On/Auto/Off
High/Low
Cool/Auto/Off
3.53
3.38
A
NOTES:
1. Holes visable on right side are
also on left side in the same location.
2. Holes on top are also on the back
in the same location horizontally,
1" down vertically.
Summer/Winter
Heat/Cool
2.13
3.53
B
2.56
Auto/Off
Table 60.2
Remote Panel Dimensions (All dimensions in inches)
Thermostat Panel Style
❏ None
Light and Switch Panels Only
Light and Switch Panels with Single Stage
Thermostat or Electronic Set Point Adjustor
Light and Switch Panels with
Two Stage Thermostat
❏ Single Stage
❏ Two Stage
❏ Electronic Set Point Adjustor Maxitrol TD121
60
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Remote Panel Type
A
B
C
7.06
-
2.81
10.60
3.53
4.58
13.09
6.03
5.82
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 61.1 - IBG/IBS/OBG/OBP Blower Package Unit Operating Weights
See Evaporative Cooler Data
OBP Dampers Dampers Insulation Double Wall
Rainhood EVAP
Motor Filters
Unit
Fresh Air F & RA (Indoor only)(All Sections)
439
6
26
46
5
38
65
474
6
26
46
5
38
67
511
6
29
52
5
43
70
588
6
29
52
7
46
72
626
8
33
60
7
46
83
875
15
33
60
14
93
83
738
12
38
70
7
53
90
1019
17
38
70
14
96
90
959
8
33
60
7
46
83
1208
15
33
60
14
93
83
1153
12
38
70
7
53
90
1352
17
38
70
14
96
90
1767
17
38
70
14
96
90
See Motor Data
OBG
Model Blower Type IBG IBS Unit
Size
(Digit 16) Unit
Unit Vent Cap
75
All
236
373
429
16
100/125
All
272
409
464
16
150/175
All
308
441
501
16
200/225
All
365
515
573
16
250/300 E,F,G, or H 396
568
611
26
250/300 I, J, or K 645
817
860
26
350/400 E,F,G, or H 482
652
723
35
350/400 I, J, or K 763
933
922
35
500/600
G or H
577
843
929
52
500/600 I, J, K, or L 826 1092
1178
52
700/800
G or H
733
981
1123
70
700/800 I, J, K, or L 1014 1262
1322
70
840/960 I, J, K, or L 1265 1591
1722
105
Table 61.2 - ICG/ICS/OCG/OCP Cooling Package Unit Operating Weights
OCP Dampers Dampers Insulation Double Wall
Motor Filters
Rainhood Coil
Unit Fresh Air F & RA (Indoor only)(All Sections)
546
6
26
46
10
72
65
584
6
26
46
10
72
67
626
6
29
52
10
77
70
714
6
29
52
12
85
72
756
8
33
60
12
87
83
1005
15
33
60
19
134
83
887
12
38
70
12
101
90
1168
17
38
70
19
144
90
See Cooling Coil Data
OCG
ICG ICS Unit
Unit
Unit Vent Cap
343
480
536
16
382
519
574
16
423
556
616
16
491
641
699
16
526
698
741
26
775
947
990
26
631
801
872
35
912 1082
1071
35
See Motor Data
Model Blower Type
Size
(Digit 16)
75
All
100/125
All
150/175
All
200/225
All
250/300 E,F,G, or H
250/300 I, J, or K
350/400 E,F,G, or H
350/400 I, J, or K
Table 61.3 - ODG/ODP Outdoor w/ Downturn Package Operating Weights
See Evaporative Cooler Data
ODG
Dampers Dampers Double Wall
ODP Motor Filters
Rainhood EVAP
Unit Vent Cap
Fresh Air F & RA (All Sections)
Unit
530
16
540
6
26
46
73
65
568
16
578
6
26
46
73
67
611
16
621
6
29
52
78
70
692
16
707
6
29
52
86
72
732
26
747
8
33
60
88
83
981
26
996
15
33
60
135
83
861
35
876
12
38
70
102
90
1060
35
1057
17
38
70
145
90
1050
52
1080
8
33
60
88
83
1299
52
1329
15
33
60
135
83
1261
70
1291
12
38
70
102
90
1460
70
1490
17
38
70
145
90
1860 105
1905
17
38
70
145
90
See Motor Data
Model Blower Type
Size
(Digit 16)
75
All
100/125
All
150/175
All
200/225
All
250/300 E,F,G, or H
250/300 I, J, or K
350/400 E,F,G, or H
350/400 I, J, or K
500/600
G or H
500/600 I, J, K, or L
700/800
G or H
700/800 I, J, K, or L
840/960 I, J, K, or L
Table 61.4 - OPG/OPP Outdoor Packaged Operating Weights
877
1126
1025
1306
8
15
12
17
33
33
38
38
60
60
70
70
129
176
150
193
83
83
90
90
See Cooling Coil Data
26
26
35
35
See Evaporative Cooler
Data
250/300 E,F,G, or H 862
250/300 I, J, or K 1111
350/400 E,F,G, or H 1010
350/400 I, J, or K 1209
See Motor Data
Model Blower Type Dampers Dampers Double Wall
OPG
OPP Motor
Filters
Rainhood EVAP Coil
Size
(Digit 16) Unit Vent Cap
Fresh Air F & RA (All Sections)
Unit
75
All
637
16
647
6
26
46
107
65
100/125
All
678
16
688
6
26
46
107
67
150/175
All
726
16
736
6
29
52
112
70
200/225
All
818
16
833
6
29
52
125
72
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
61
Gas-Fired Indoor and Outdoor Duct Furnaces
Cooling Section Specifications for sizes 75-400
Models with a cooling section can be provided with either a
factory installed direct expansion (DX) evaporator, a chilled fluid
(for use with water, ethylene glycol, or propylene glycol fluids)
coil, or the coil can be field supplied and installed by others.
The cooling section is located downstream of the duct furnace
heat exchanger in a blow-through configuration, preventing
condensation on the heat exchanger in the cooling mode. Thus,
a stainless steel heat exchanger is not required when a cooling
section is used. (However, a stainless steel heat exchanger is
still recommended when the combined entering/return air to the
unit is below 40°F.)
Figure 62.1
Cooling Section
Optional double
wall construction
The cooling section includes a full coverage, 3-way sloping
409 stainless steel drain pan to remove condensate from coil
headers, thermal expansion valves, and refrigerant piping.
Insulation is standard on outdoor units and optional on indoor
units and double wall construction is optional on all units. The
cabinet includes two doors, a removable upper door for service
access to the coil once the plumbing has been installed and a
lower door which includes a factory supplied 1" stubbed drain
connection to the exterior of the cabinet. Field connections for
coil inlet and outlet piping can be made through the cabinet
corner post or back of the unit. The cooling section duct
transition includes 1-1/2" flanges for fastening the sides of
the coil. The bottom duct transition is angled to remove any
condensation that may be entrained in the supply air stream.
DX single circuit (shown)
and dual circuit coils
available
Optional Factory
Installed
DX or Chilled
Water coil.
Fin spacings
of 6,8,10,12
or 14 fins per
inch
Adjustable
mounting bracket
for 2,3,4 and 6
row coils
For field supplied coils, do not exceed the factory installed
coil dimensions. When obtaining the specifications from a
coil manufacturer, it is important to obtain the pressure drop
through the coil so that the proper motor horsepower can be
selected.
Full coverage
3-way sloping
409 stainless
steel drain pan
Right or left hand
coil header access to
match gas controls
1” stubbed drain
connection
Table 62.1
Cooling Coil Performance Limits
Model
Size
75
100
125
150
175
200
225
250
300
350
400
➀
②
③
④
⑤
DX - Single Circuit DX - Dual Circuit Chilled Water Max. Cooling Tons ② ③
Min
Max Coil Area Max Coil Area Max Coil Area CFM
DX Chilled
CFM ➀ (Sq. Ft.) CFM ➀ (Sq. Ft) CFM ➀ (Sq. Ft.) (All Units)
Coils Water Coils
1891
2206
2206
2521
2521
3352
3352
3724
3724
5214
5214
3.44
4.01
4.01
4.58
4.58
6.09
6.09
6.77
6.77
9.48
9.48
1707
2048
2048
2416
2416
3165
3165
3538
3538
4996
4996
3.10
3.72
3.72
4.39
4.39
5.76
5.76
6.43
6.43
9.08
9.08
1676
2011
2011
2372
2372
3214
3214
3592
3592
5073
5073
3.05
3.66
3.66
4.31
4.31
5.84
5.84
6.53
6.53
9.22
9.22
609 ④
741 ⑤
926
1111
1296
1481
1667
1852
2222
2593
2963
9.38
11.43
11.43
13.42
13.42
18.12
18.12
20.24
20.24
27.26
27.26
10.56
12.62
12.62
14.77
14.77
19.28
19.28
21.33
21.33
29.25
29.25
Based on 550 feet per minute (FPM) coil face velocity.
1 Ton = 12,000 Btu/Hr
Based on 95°F Entering Dry Bulb, 75° Entering Wet Bulb - Refer to page 65 for refrigerant conditions and page 67 for chilled water conditions.
Model Size 75 CFM listed for Chilled Water - DX Single Circuit CFM minimum is 688 and DX Dual Circuit CFM min is 621.
Model Size 100 CFM listed for Chilled Water - DX Single Circuit CFM minimum is 802 and DX Dual Circuit CFM min is 745.
62
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
Cooling Coil Selection
Airdale BreezeTM AccuSpec selection software is the preferred
method of cooling coil sizing and selection because of the
variety of inlet air conditions and unit airflow. The following
tables provide general performance of the cooling coil options
available.
Unit Selection Information
Cooling coil selection requires the following inputs:
Cooling Coil Selection Inputs (All Coils)
• Model Size to determine cabinet dimensions.
• Airflow in Actual Cubic Feet Per Minute (ACFM) and Altitude. Note: For manual selection in performance tables, the ACFM needs to be converted to Standard Cubic Feet Per Minute (SCFM).
• Entering Air Conditions (Dry and Wet Bulb) to the coil. Units with both outside and return air require the mixed air temperature to be calculated - See below for Mixed Air Temperature Calculation. Refer to the ASHRAE Fundamentals Handbook - Section 27 for Cooling Climactic Design Information for outside air data.
• Cooling capacity required in MBH or Tons.
DX Cooling Additional Inputs
• Refrigerant is R-22. Consult factory for other refrigerants.
• Evaporator circuiting - Single Circuit (1-Stage Cooling) or Dual Circuit (2-Stage Cooling)
• Suction Temperature (°F)
• Liquid Temperature (°F)
• Refrigerant Super Heat Temperature (°F)
Chilled Water Additional Inputs
•
•
•
•
Fluid Type: Water, Ethylene Glycol, or Propylene Glycol.
Mixture Percent: For Glycol solutions, the percentage of the solution that is either ethylene or propylene (0-60%).
Entering Fluid Temperature (°F)
Fluid Flow Rate (GPM) or Leaving Fluid Temperature °F
MIXED AIR TEMPERATURE CALCULATION
The cooling coil capacity is based on the mixed air temperature
seen by the cooling coil. When outside air and return air
streams are mixed and then delivered to the cooling coil, the
mixed air temperature must be calculated to determine the
capacity.
Mixed Air Dry Bulb Formula
Outside Air DB x Percent Outside Air
+ Return Air DB x Percent Return Air
Mixed Air Dry Bulb
Table 63.1
Enthalpy of Saturated Air for Various Wet Bulb Temp.
Wet Bulb Enthalpy
Temp (°F) (Btu/lb)
Wet Bulb Enthalpy
Temp (°F) (Btu/lb)
Wet Bulb Enthalpy
Temp (°F) (Btu/lb)
60
61
62
63
64
65
66
67
68
69
26.47
27.16
27.86
28.58
29.32
30.07
30.84
31.63
32.43
33.25
70
71 72 73 74 75 76
77
78 79 34.1
34.96
35.84
36.74
37.67
38.62
39.58
40.58
41.59
42.63
80
81
82
83
84
85
43.7
44.79
45.91
47.06
48.24
49.45
Example:
A heating & make-up air unit in Chicago is operating at 5000
acfm and is designed to deliver a maximum of 30% outside air.
The outside design air conditions are 88°F DB / 73°F WB and
the return air conditions are 75°F DB / 63°F WB.
The mixed dry bulb is calculation is
88°F DB x .30 = 26.4°F
+
75°F DB x .70 = + 52.5°F
Mixed Air Dry Bulb78.9°F
To determine the mixed wet bulb the enthalpies must be
determined. Using Table 63.1, 73°F = 36.75 btu/lb and
63°F = 28.58 btu/lb. Thus
36.75°F btu/lb x .30 = 11.03
+ 28.58°F btu/lb x .70 = + 20.01
Mixed Air Enthalpy31.04 btu/lb
Using the Table 63.1, 31.04 btu/lb = 66.3°F
STANDARD (SCFM) AIRFLOW CALCULATION
For elevations above 1500 feet, the selection of a cooling coil
using a catalog method requires the conversion of the airflow
from actual CFM (ACFM) to standard CFM (SCFM). The
Airdale BreezeTM AccuSpec selection software is the preferred
method of cooling coil sizing and selection because the airflow
correction is automatically calculated. Blower motor Hp must
be selected using ACFM as blowers are constant volume
devices. Cooling coil performance tables are based on SCFM
(standard air density) and therefore the air volume must be
converted to ACFM to determine the performance. The formula
for conversion is
SCFM = ACFM x Air Density Correction Factor
Mixed Air Dry Bulb Formula
Outside Air Enthalpy x Percent Outside Air
+ Return Air Enthalpy x Percent Return Air
Mixed Air Enthalpy
The Outside and Return Air Enthalpy is determined from Table
63.1 and the Mixed Air Enthalpy is converted back to a Mixed
Air Web Bulb using the same table.
Where the Air Density factor can be found in Table 63.2 for
various temperatures and elevations. The air temperature used
would be the Mixed Air Dry Bulb temperature.
Table 63.2
Air Density Correction Factor
Air Temp Altitude (Feet)
(°F) 60 70 80 90
100 0 1500 2000 3000 4000 5000 6000
0.98 1.02 1.06 1.09 1.14 1.18 1.22
1.00 1.06 1.08 1.12 1.26 1.20 1.25
1.02 1.08 1.10 1.14 1.18 1.22 1.27
1.04 1.10 1.12 1.16 1.20 1.25 1.30
1.06 1.12 1.14 1.18 1.22 1.27 1.32
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
63
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 64.1
DX Single Circuit Cooling Coil Performance Data (R-22 Refrigerant)
Capacity based on 80°F Entering Dry Bulb, 67°F Entering Wet Bulb, 45°F Sat. Suction, 8°F Superheat, 110°F Liquid. ➀➁➂
2-Row Coil ➄4-Row Coil ➄ 6-Row Coil ➄
Air Face Fin Air Final Air Dry Air Final Air Dry
AirFinal Air Cooling ➆
Cooling ➆
Cooling ➆
Model Flow Velocity Space Total Sen P.D.
DB WB
Wt Total Sen P.D. DB WB Wt Total Sen P.D. DB WB Size
SCFM➃ FPM FPI MBH MBH "W.C. °F
°F
Lbs MBH MBH "W.C. °F °F
lbs MBH MBH "W.C. °F °F
75
100
&
125
150
&
175
200
&
225
250
&
300
350
&
400
859
250
1375
400
1891
500
1003
250
1604
400
2206
550
1146
250
1833
400
2521
550
1523
250
2438
400
3352
550
1862
275
2708
400
3724
550
2607
275
3792
400
5214
550
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
7.8
8.7
10.0
9.7
10.9
12.7
11.2
12.5
14.7
10.3
11.6
13.5
13.0
14.7
17.3
15.1
17.1
20.3
12.9
14.5
17.0
16.6
18.8
22.3
19.3
22.0
26.3
18.5
21.0
24.7
23.9
27.2
32.4
28.0
32.0
38.5
23.2
26.3
31.2
28.2
32.2
38.6
33.3
38.2
46.1
40.7
46.3
55.3
48.7
55.8
67.6
56.5
65.2
79.7
7.8
8.7
10.0
9.7
10.9
12.7
11.2
12.5
14.7
10.3
11.6
13.5
13.0
14.7
17.3
15.1
17.1
20.3
12.9
14.5
17.0
16.6
18.8
22.3
19.3
22.0
26.3
18.5
21.0
24.7
23.9
27.2
32.4
28.0
32.0
38.5
23.2
26.3
31.2
28.2
32.2
38.6
33.3
38.2
46.1
35.9
41.0
48.7
45.5
52.6
63.5
55.4
64.5
79.2
0.04
0.05
0.07
0.08
0.09
0.13
0.13
0.16
0.25
0.05
0.06
0.07
0.08
0.09
0.13
0.13
0.16
0.21
0.04
0.05
0.06
0.09
0.10
0.13
0.13
0.16
0.21
0.04
0.05
0.07
0.10
0.11
0.14
0.13
0.16
0.21
0.05
0.06
0.08
0.08
0.10
0.13
0.15
0.17
0.22
0.06
0.07
0.09
0.11
0.13
0.15
0.17
0.20
0.25
71.6
70.7
69.2
73.5
72.7
71.5
74.5
73.9
74.8
70.5
69.3
67.6
72.5
71.5
70.0
73.7
72.8
71.5
69.6
68.3
66.3
71.6
70.5
68.8
72.9
71.9
70.3
68.7
67.3
65.0
70.9
69.7
67.7
72.3
71.2
69.4
68.5
66.9
64.5
70.4
69.0
66.8
71.7
70.5
68.5
67.3
65.4
62.7
68.9
67.2
64.5
70.2
68.5
65.9
64.4
64.1
63.6
65.0
64.8
64.4
65.3
65.1
64.8
64.1
63.7
63.1
64.7
64.4
63.9
65.1
64.8
64.4
63.8
63.3
62.7
64.4
64.1
63.5
64.8
64.5
64.0
63.5
63.0
62.2
64.2
63.8
63.1
64.6
64.3
63.7
63.4
62.9
62.1
64.0
63.6
62.9
64.5
64.1
63.4
62.4
61.8
60.7
63.3
62.7
61.7
63.9
63.4
62.5
44
45
48
44
45
48
44
45
48
47
49
52
47
49
52
47
49
52
50
52
56
50
52
56
50
52
56
61
64
69
61
64
69
61
64
69
64
67
74
64
67
74
64
67
74
78
83
91
78
83
91
78
83
91
20.6 17.3
22.6 18.8
25.6 20.5
26.8 24.4
29.8 26.8
34.2 29.8
31.7 60.5
35.5 33.9
41.3 38.3
26.5 21.2
29.1 22.9
32.9 25.0
34.6 29.6
38.5 32.5
44.3 36.3
40.9 36.9
45.8 41.0
53.4 46.6
32.6 24.0
35.8 27.1
40.4 29.7
42.9 35.0
47.7 38.6
54.9 43.2
50.8 43.6
57.0 48.5
66.4 55.1
46.1 34.3
50.5 37.1
56.9 40.7
60.7 47.9
67.4 52.7
77.7 59.2
72.3 59.7
81.0 66.3
94.3 75.5
57.2 41.9
62.7 45.5
70.7 50.1
71.3 54.6
79.0 60.1
90.6 67.4
84.6 67.8
94.9 75.5
110.1 86.0
90.4 62.6
98.5 67.9
110.5 74.9
114.0 81.7
126.0 90.0
143.0 100.6
136.3 101.3
151.6 112.6
174.2 127.8
0.10
0.12
0.16
0.22
0.26
0.33
0.34
0.40
0.51
0.11
0.13
0.16
0.22
0.26
0.33
0.37
0.43
0.55
0.11
0.13
0.17
0.24
0.28
0.33
0.37
0.43
0.55
0.11
0.13
0.17
0.24
0.28
0.36
0.41
0.47
0.55
0.13
0.15
0.20
0.24
0.28
0.36
0.41
0.47
0.60
0.13
0.15
0.20
0.24
0.28
0.36
0.41
0.47
0.60
61.3
59.8
57.9
63.6
62.0
59.9
65.1
63.4
61.3
60.5
58.9
56.9
62.9
61.2
59.0
64.5
62.8
60.5
59.8
58.1
56.0
62.3
60.5
58.2
64.0
62.2
59.8
59.2
57.4
55.2
61.8
60.0
57.5
63.5
61.7
59.2
59.2
57.4
55.1
61.3
59.5
57.0
63.1
61.2
58.6
57.8
55.9
53.4
81.7
58.0
55.4
62.0
60.0
57.3
59.8
59.0
57.8
61.2
60.5
59.5
62.1
61.4
60.5
58.9
58.1
56.8
60.5
59.8
58.6
61.5
60.8
59.7
58.3
57.3
55.9
60.0
59.1
57.8
61.0
60.2
59.0
57.6
56.6
55.2
59.5
58.5
57.1
60.5
59.7
58.4
57.5
56.5
54.9
59.0
58.0
56.5
60.2
59.3
57.9
56.1
55.0
53.3
57.7
56.6
55.0
59.0
58.1
56.6
60
64
70
60
64
70
60
64
70
66
70
77
66
70
77
66
70
77
71
76
84
71
76
84
71
76
84
88
94
105
88
94
105
88
94
105
95
101
113
95
101
113
95
101
113
120
128
146
120
128
146
120
128
146
32.0 22.7
34.4 23.9
37.4 25.4
43.7 32.6
47.5 34.9
52.9 37.6
53.0 41.3
58.3 44.7
65.7 48.8
39.6 27.3
42.5 28.9
46.1 30.6
54.6 39.5
59.3 42.2
65.7 45.5
66.5 50.0
72.9 54.0
82.0 59.0
47.4 32.1
50.6 33.9
54.7 35.9
65.6 46.3
71.1 49.6
78.5 53.4
80.2 58.7
87.7 63.4
98.3 69.2
65.2 43.6
69.4 45.9
74.8 48.6
90.8 63.0
97.9 67.3
107.8 72.5
111.0 79.7
121.0 86.0
134.9 93.7
79.7 53.1
85.0 56.1
91.6 59.5
102.4 70.6
111.6 75.9
122.4 81.6
126.9 89.9
138.1 97.0
153.5 105.6
117.6 76.9
124.7 80.9
133.2 85.4
152.4 102.5
163.5 109.2
176.7 116.5
184.9 128.7
200.4 138.5
218.6 149.3
0.17
0.20
0.26
0.36
0.42
0.54
0.61
0.71
0.90
0.17
0.20
0.26
0.36
0.42
0.54
0.61
0.71
0.90
0.17
0.20
0.26
0.36
0.42
0.54
0.61
0.71
0.90
0.17
0.20
0.26
0.36
0.42
0.54
0.61
0.71
0.90
0.19
0.23
0.30
0.36
0.42
0.54
0.61
0.71
0.90
0.19
0.23
0.30
0.36
0.42
0.54
0.61
0.71
0.90
55.6
54.2
52.6
58.0
56.5
54.7
59.8
58.1
56.1
54.8
53.3
51.7
57.2
55.7
53.7
59.0
57.3
55.3
54.0
52.6
51.0
56.6
55.0
53.0
58.5
56.7
54.6
53.5
52.1
50.8
56.1
54.5
52.5
58.0
56.3
54.1
53.6
52.1
50.4
55.9
54.1
52.1
57.7
55.9
53.8
52.7
51.3
49.7
55.0
53.3
51.6
57.2
55.4
53.5
➀ Refer to the BreezeTM AccuSpec selection software for additional coil selections and performance at other conditions.
➁ Coils are rated in compliance with ARI 410
➂ Coils Types Available: Single Circuit (Performance data shown above) and Dual Circuit Interlaced (Refer to Breeze AccuSpec for performance data).
➃ For Dual Circuit Coils, refer to page 62 for maximum CFM
➄ Coil Rows Available: 2, 3, 4, and 6
➅ Fin Spacings Available: 8, 10, 12, and 14
➆ 1 Ton = 12 MBH
64
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
55.2
54.2
52.6
57.1
56.1
54.7
58.4
57.5
56.1
54.4
53.3
51.7
56.3
55.3
53.7
57.7
56.7
55.2
53.6
52.6
51.0
55.7
54.6
53.0
57.1
56.1
54.5
53.1
52.1
50.8
55.2
54.1
52.5
56.7
55.6
54.1
53.1
52.0
50.4
55.0
53.7
52.1
56.3
55.2
53.7
52.2
51.2
49.7
54.1
53.0
51.6
55.8
54.7
53.4
Dry
Wt
lbs
77
82
92
77
82
92
77
82
92
85
91
102
85
91
102
85
91
102
93
99
112
93
99
112
93
99
112
116
125
141
116
125
141
116
125
141
125
134
153
125
134
153
125
134
153
161
174
200
161
174
200
161
174
200
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 65.1
DX Single Circuit Cooling Coil Performance Data (R-22 Refrigerant)
Capacity based on 95°F Entering Dry Bulb, 75°F Entering Wet Bulb, 45°F Sat. Suction, 8°F Superheat, 110°F Liquid. ➀➁➂
2-Row Coil ➄4-Row Coil ➄ 6-Row Coil ➄
Final Air
Cooling ➆
Air Face Fin Air Final Air Dry AirFinal Air
Dry
Air
Cooling ➆
Cooling ➆
Model Flow Velocity Space Total Sen P.D.
DB WB
Wt Total Sen P.D. DB WB Wt Total Sen P.D. DB WB Size SCFM➃ FPM FPI MBH MBH "W.C. °F °F
Lbs MBH MBH "W.C. °F °F
lbs MBH MBH "W.C. °F
°F
75
100
&
125
150
&
175
200
&
225
250
&
300
350
&
400
859
250
1375
400
1891
500
1003
250
1604
400
2206
550
1146
250
1833
400
2521
550
1523
250
2438
400
3352
550
1862
275
2708
400
3724
550
2607
275
3792
400
5214
550
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
8
10
14
14.5 14.5
16.4 16.4
19.3 19.3
18.7 18.7
21.2 21.2
25.3 25.3
21.9 21.9
25.0 25.0
30.0 30.0
18.7 18.7
21.2 21.2
25.2 25.2
24.0 24.0
27.4 27.4
32.8 32.8
28.3 28.3
32.4 32.4
39.2 39.2
23.5 22.3
26.7 25.4
31.8 29.9
29.7 29.7
34.0 34.0
41.0 41.0
34.8 34.8
40.1 40.1
48.7 48.7
34.0 30.4
38.6 34.7
46.0 40.8
42.6 41.3
48.8 47.7
59.1 57.6
49.5 49.5
57.2 57.8
69.8 69.8
42.6 36.9
48.4 42.1
58.1 50.0
50.7 46.8
58.3 54.1
70.6 65.4
58.7 57.2
67.8 66.7
83.0 81.9
74.3 56.0
84.5 64.0
100.5 75.9
89.2 70.8
101.7 81.7
122.6 98.7
102.5 85.8
117.3 99.8
143.2 122.5
0.04
0.05
0.06
0.09
0.11
0.14
0.13
0.16
0.21
0.05
0.06
0.07
0.08
0.10
0.13
0.15
0.17
0.22
0.05
0.06
0.07
0.09
0.11
0.14
0.17
0.16
0.22
0.05
0.06
0.08
0.10
0.12
0.15
0.15
0.18
0.23
0.06
0.07
0.09
0.11
0.13
0.17
0.17
0.20
0.25
0.06
0.08
0.10
0.12
0.14
0.18
0.20
0.24
0.28
79.3
77.3
74.2
82.4
80.7
78.0
84.3
82.8
80.3
77.7
75.4
71.8
81.2
79.2
76.1
83.1
81.4
78.6
77.0
74.5
70.9
80.0
77.8
74.3
82.2
80.3
77.1
76.5
73.9
70.2
79.3
76.9
73.1
81.3
79.2
75.7
76.7
74.1
70.2
79.0
76.5
72.6
80.8
78.4
74.7
75.1
72.3
68.0
70.8
75.1
70.1
79.8
77.3
73.2
70.8
70.3
69.4
71.7
71.2
70.4
72.2
71.8
71.1
70.4
69.7
68.7
71.3
70.8
69.9
71.9
71.4
70.6
69.9
69.2
68.0
71.0
70.4
69.4
71.6
71.1
70.2
69.4
68.6
67.3
70.7
70.0
68.9
71.4
70.8
69.8
69.3
68.4
67.0
70.4
69.6
68.4
71.1
70.5
69.4
67.7
66.7
64.9
77.7
68.2
66.7
70.1
69.4
68.0
44
45
48
44
45
48
44
45
48
47
49
52
47
49
52
47
49
52
50
52
56
50
52
56
50
52
56
61
64
69
61
64
69
61
64
69
64
67
74
64
67
74
64
67
74
78
83
91
78
83
91
78
83
91
37.3 27.1
41.0 29.3
46.3 32.2
49.0 38.1
54.4 41.9
62.7 46.8
57.8 47.5
64.8 52.8
75.6 59.9
47.2 32.8
51.6 35.6
58.0 39.0
62.3 46.0
69.1 50.6
79.4 56.7
73.8 57.3
82.7 63.8
96.3 72.5
57.2 38.6
62.4 41.9
70.0 45.9
75.9 54.1
84.0 59.6
96.3 66.7
90.4 67.4
100.9 74.9
117.4 85.3
79.4 52.5
86.9 57.0
96.8 62.4
106.1 73.7
117.4 81.1
134.1 90.9
126.5 91.6
141.1 101.9
163.4 115.9
97.5 63.9
106.2 69.4
118.9 76.4
122.4 83.3
135.5 91.9
154.2 102.8
146.3 103.6
163.1 115.3
188.3 131.1
146.7 93.1
160.3 101.4
178.3 111.5
185.8 121.5
204.5 133.8
231.0 149.6
221.8 150.5
246.6 167.5
280.1 189.3
0.11
0.13
0.17
0.24
0.28
0.36
0.41
0.43
0.55
0.11
0.13
0.17
0.24
0.28
0.36
0.41
0.47
0.60
0.11
0.13
0.17
0.24
0.28
0.36
0.41
0.47
0.60
0.11
0.13
0.17
0.24
0.28
0.36
0.41
0.47
0.60
0.13
0.15
0.20
0.24
0.28
0.36
0.41
0.47
0.60
0.13
0.15
0.20
0.24
0.28
0.36
0.41
0.47
0.60
65.8
63.4
60.3
69.4
66.8
63.5
71.8
69.2
65.7
64.7
62.2
59.0
68.4
65.8
62.3
71.0
68.2
64.6
63.8
41.9
57.9
67.7
64.9
61.3
70.3
67.5
63.7
63.1
60.3
57.1
67.0
64.2
60.5
69.7
66.9
63.0
63.2
60.5
57.0
66.5
63.6
59.8
69.3
66.3
62.4
61.9
59.0
55.4
65.3
62.3
58.5
68.3
65.3
61.4
63.4
62.1
60.2
65.7
64.6
62.8
67.2
66.1
64.5
62.3
60.9
58.8
64.8
63.6
61.6
66.4
65.2
63.4
61.4
60.0
57.8
64.0
62.7
60.6
65.7
64.5
62.5
60.7
59.1
56.9
63.4
62.0
59.8
65.1
63.8
61.8
60.6
59.1
56.8
62.9
61.4
59.2
64.7
63.3
61.2
59.4
57.6
55.2
61.7
60.1
57.8
63.7
62.2
60.2
60
64
70
60
64
70
60
64
70
66
70
77
66
70
77
66
70
77
71
76
84
71
76
84
71
76
84
88
94
105
88
94
105
88
94
105
95
101
113
95
101
113
95
101
113
120
128
146
120
128
146
120
128
146
54.1 34.6
57.7 36.5
62.3 38.7
75.0 50.0
81.2 53.5
89.7 57.7
91.7 63.4
100.3 68.5
112.6 74.9
65.9 41.4
70.1 43.7
75.3 46.2
91.6 59.8
99.2 64.0
109.0 69.0
112.7 75.9
122.9 82.0
137.2 89.5
77.5 48.2
82.3 50.8
88.1 53.6
108.4 69.7
116.9 74.5
127.9 80.1
133.3 88.3
144.7 95.3
161.0 103.9
105.1 64.9
111.6 68.4
118.7 71.9
147.5 93.9
158.8 100.4
173.0 107.7
181.0 118.8
196.8 128.3
217.4 139.4
127.4 78.6
135.5 83.1
144.8 87.8
165.9 105.1
178.7 112.4
193.9 120.4
203.3 132.8
221.0 143.4
242.9 155.4
182.9 111.9
192.4 117.4
203.8 123.3
234.8 148.1
249.9 157.3
267.9 167.1
282.8 185.3
303.8 198.7
327.1 212.6
0.17
0.20
0.26
0.36
0.42
0.54
0.61
0.71
0.90
0.17
0.20
0.26
0.36
0.42
0.54
0.61
0.71
0.90
0.17
0.20
0.26
0.36
0.42
0.54
0.61
0.71
0.90
0.17
0.20
0.26
0.36
0.42
0.54
0.61
0.71
0.90
0.19
0.23
0.30
0.36
0.42
0.54
0.61
0.71
0.90
0.19
0.23
0.30
0.36
0.42
0.54
0.61
0.71
0.90
57.7
55.7
53.3
61.3
59.0
56.2
64.0
61.5
58.3
56.8
54.7
52.4
60.5
58.1
55.2
63.1
60.6
57.5
56.1
54.0
51.7
59.8
57.4
54.5
62.6
60.0
56.9
55.6
53.4
51.3
59.3
56.9
54.1
62.2
59.6
56.5
55.9
53.7
51.4
59.1
56.6
53.8
62.0
59.4
56.4
55.3
53.3
51.2
58.8
56.6
54.2
62.1
59.7
57.3
57.1
55.6
53.3
59.9
58.4
56.2
61.9
60.4
58.3
56.1
54.6
52.4
59.1
57.5
55.2
61.1
59.6
57.4
55.4
53.9
51.7
58.4
56.8
54.5
60.5
59.0
56.8
54.9
53.4
51.3
57.9
56.3
54.1
60.1
58.6
56.4
55.2
53.5
51.4
57.7
56.0
53.8
59.9
58.3
56.3
54.5
53.1
51.2
57.5
56.0
54.2
60.0
58.7
57.2
Dry
Wt
lbs
77
82
92
77
82
92
77
82
92
85
91
102
85
91
102
85
91
102
93
99
112
93
99
112
93
99
112
116
125
141
116
125
141
116
125
141
125
134
153
125
134
153
125
134
153
161
174
200
161
174
200
161
174
200
➀ Refer to the BreezeTM AccuSpec selection software for additional coil selections and performance at other conditions.
➁ Coils are rated in compliance with ARI 410
➂ Coils Types Available: Single Circuit (Performance data shown above) and Dual Circuit Interlaced (Refer to Breeze AccuSpec for performance data).
➃ For Dual Circuit Coils, refer to page 62 for maximum CFM
➄ Coil Rows Available: 2, 3, 4, and 6
➅ Fin Spacings Available: 8, 10, 12, and 14
➆ 1 Ton = 12 MBH
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
65
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 66.1
Chilled Water Cooling Coil Performance Data
Capacity based on 80°F Entering Dry Bulb, 67°F Entering Wet Bulb, 45°F Entering Water Temp, 70 GPM. ➀➁➂
4-Row Coil ➃ 6-Row Coil ➃
Cooling ➅
Air Face Fin Air WaterFinal Air Dry Dry WaterFinal Air Cooling ➅
Wt Total Sen P.D. P.D.
DB WB
Model Flow Velocity Space Total Sen P.D. P.D. ➂ DB WB
Size
SCFM FPM FPI ➄ MBH MBH "W.C. Ft H2O °F °F
lbs MBH MBH "W.C. Ft H2O °F
°F
75
100
&
125
150
&
175
200
&
225
250
&
300
350
&
400
➀
➁
➂
762
250
1219
400
1676
550
914
250
1463
400
2011
550
1186
275
1725
400
2372
550
1607
275
2338
400
3214
550
1861
285
2613
400
3592
550
2629
285
3690
400
5073
550
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
31.0 19.8
38.1 24.1
41.2 25.9
41.6 27.4
52.7 34.3
58.4 37.8
50.0 33.6
63.7 43.0
71.9 47.9
37.2 23.7
45.6 28.8
49.4 31.0
50.0 32.8
62.8 41.1
69.9 45.2
59.4 40.3
76.1 51.4
85.7 57.3
46.5 29.8
57.5 36.5
62.6 39.5
58.4 38.5
73.8 48.2
82.0 53.1
70.0 47.5
89.4 60.5
100.4 67.3
61.8 39.9
76.2 48.7
83.1 52.7
77.3 51.3
97.0 64.1
107.5 70.4
91.8 63.0
116.4 79.7
130.5 88.7
70.5 45.6
86.9 55.8
94.7 60.5
86.0 57.3
107.6 71.5
119.4 78.4
101.5 70.2
129.0 88.9
144.8 98.8
98.4 63.9
120.9 78.0
132.4 84.7
119.2 80.0
149.3 99.6
165.6 109.5
140.9 97.9
177.5 123.8
198.6 136.8
0.09
0.15
0.21
0.21
0.32
0.44
0.36
0.54
0.71
0.09
0.15
0.21
0.21
0.32
0.44
0.36
0.54
0.71
0.11
0.18
0.24
0.21
0.32
0.44
0.36
0.54
0.71
0.11
0.18
0.24
0.21
0.32
0.44
0.36
0.54
0.71
0.12
0.19
0.26
0.21
0.32
0.11
0.36
0.54
0.71
0.12
0.19
0.26
0.21
0.32
0.44
0.36
0.54
0.71
13.9
13.9
13.9
13.9
13.9
13.9
13.9
13.9
13.9
14.3
14.3
14.3
14.3
14.3
14.3
14.3
14.2
14.2
14.7
14.7
14.6
14.7
14.6
14.6
14.6
14.6
14.6
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.7
12.9
12.9
12.9
12.9
12.9
12.9
12.9
12.9
12.9
13.8
13.8
13.8
13.8
13.8
13.8
13.8
13.8
13.8
56.3
51.1
48.9
59.5
54.2
51.7
61.6
56.6
53.9
56.3
51.2
48.9
59.5
54.3
51.8
61.7
56.7
54.0
57.0
51.8
49.5
59.6
54.4
51.9
61.7
56.7
54.1
57.3
52.3
50.0
59.9
54.9
52.5
62.1
57.3
54.8
57.6
52.6
50.3
60.0
55.0
52.6
62.1
57.4
54.9
57.8
52.9
50.6
60.2
55.3
52.9
62.4
57.7
55.3
53.8
50.2
48.5
56.2
52.8
51.0
57.7
54.8
52.9
53.8
50.2
48.5
56.2
52.9
51.1
57.8
54.8
53.0
54.3
50.8
49.1
56.3
53.0
51.2
57.8
54.9
53.1
54.6
51.2
49.5
56.5
53.5
51.8
58.1
55.4
53.8
54.8
51.5
49.8
56.6
53.6
51.9
58.2
55.5
53.9
55.0
51.8
50.0
56.8
53.8
52.2
58.4
55.8
54.3
59
65
70
59
65
70
59
65
70
66
72
79
66
72
79
66
72
79
72
80
88
72
80
88
72
80
88
92
103
113
92
103
113
92
103
113
99
111
123
99
111
123
99
111
123
126
143
160
126
143
160
126
143
160
Refer to the BreezeTM AccuSpec selection software for additional coil selections and performance at other conditions.
Coils are rated in compliance with ARI 410
Coil Circuiting Available: 1/4, 1/2, 3/4 (Performance data shown above), and Full Circuiting
66
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
37.8 23.8
43.4 27.0
45.4 28.1
52.7 34.0
62.9 40.0
67.5 42.5
64.2 42.7
78.5 51.2
85.8 55.1
45.2 28.5
51.9 32.3
54.3 33.7
62.8 40.6
75.3 47.9
80.6 50.8
77.0 51.0
93.9 61.2
102.4 65.9
57.0 36.1
66.1 41.3
69.6 43.2
74.0 47.8
88.3 56.3
94.9 59.7
90.1 59.9
109.7 71.9
120.1 77.4
79.2 48.4
88.2 55.3
93.1 58.0
97.7 63.8
116.5 74.9
125.5 79.6
118.3 79.5
143.8 95.1
157.1 102.3
86.9 55.3
101.1 63.6
106.9 66.7
108.8 71.0
129.8 83.5
139.9 88.7
131.2 88.5
159.7 105.9
174.1 113.8
121.0 77.6
141.1 89.1
149.6 93.6
151.0 99.2
179.8 116.2
193.7 123.9
180.7 123.1
219.0 147.0
239.6 158.0
0.14
0.23
0.31
0.31
0.49
0.65
0.55
0.82
1.07
0.14
0.23
0.31
0.31
0.49
0.65
0.55
0.82
1.07
0.16
0.26
0.36
0.31
0.49
0.65
0.55
0.82
1.07
0.16
0.26
0.36
0.31
0.49
0.65
0.55
0.82
1.07
0.17
0.28
0.39
0.31
0.49
0.65
0.55
0.82
1.07
0.17
0.28
0.39
0.31
0.49
0.65
0.55
0.82
1.07
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.6
16.6
16.6
16.6
16.6
16.6
16.6
16.5
16.5
17.2
17.2
17.2
17.1
17.1
17.1
17.1
17.1
17.1
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.9
14.9
14.9
14.9
14.9
14.8
14.9
14.8
14.8
16.2
16.2
16.2
16.2
16.2
16.2
16.2
16.1
16.1
51.5
47.6
46.3
54.5
50.0
48.1
56.7
52.1
49.9
51.5
47.7
46.3
54.6
50.1
48.2
56.8
52.2
50.1
52.2
48.1
46.7
54.7
50.2
48.3
56.9
52.3
50.2
52.5
48.5
47.0
55.1
50.7
48.9
57.4
52.9
50.9
52.8
48.8
47.3
55.2
50.8
49.0
57.5
53.0
51.0
53.0
49.0
47.5
55.4
51.2
49.3
57.8
53.5
51.5
50.4
47.3
46.2
52.8
49.6
48.0
54.7
51.4
49.7
50.4
47.4
46.3
52.9
49.6
48.1
54.7
51.5
49.8
50.9
47.8
46.6
52.9
49.7
48.2
54.8
51.6
49.9
51.2
48.2
46.9
53.4
50.2
48.7
55.2
52.2
50.6
51.5
48.4
47.1
53.4
50.3
48.7
55.3
52.3
50.8
51.8
48.7
47.3
53.7
50.7
49.2
55.6
52.8
51.3
Dry
Wt
lbs
76
84
93
76
84
93
76
84
93
85
95
105
85
95
105
85
95
105
95
107
119
95
107
119
95
107
119
121
137
154
121
137
154
121
137
154
131
149
167
131
149
167
131
149
167
170
196
221
170
196
221
170
196
221
➃ Coil Rows Available: 4 and 6
➄ Fin Spacings Available: 6, 8, 10, 12, and 14
➅ 1 Ton = 12 MBH
Gas-Fired Indoor and Outdoor Duct Furnaces
Table 67.1
Chilled Water Cooling Coil Performance Data
Capacity based on 95°F Entering Dry Bulb, 75°F Entering Wet Bulb, 45°F Entering Water Temp, 70 GPM. ➀➁➂
4-Row Coil ➃ 6-Row Coil ➃
Air Face Fin Air WaterFinal Air Dry Air WaterFinal Air Cooling ➅
Cooling ➅
Model Flow Velocity Space Total Sen P.D. P.D. ➂ DB WB
Wt Total Sen P.D. P.D. ➂ DB WB Size
lbs MBH MBH "W.C. Ft H2O °F °F
SCFM FPM FPI ➄ MBH MBH "W.C. Ft H2O °F °F
75
100
&
125
150
&
175
200
&
225
250
&
300
350
&
400
762
250
1219
400
1676
550
914
250
1463
400
2011
550
1186
275
1725
400
2372
550
1607
275
2338
400
3214
550
1861
285
2613
400
3592
550
2629
285
3690
400
5073
550
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
6
10
14
46.0 28.0
56.6 34.0
61.3 36.7
61.5 38.6
77.6 48.4
86.4 53.3
73.2 47.5
93.6 60.5
105.7 67.4
55.2 33.5
67.7 40.7
73.3 43.9
73.5 46.2
92.9 57.9
103.2 63.7
87.4 56.8
111.9 72.3
126.1 80.6
69.0 42.2
85.2 51.6
92.9 55.9
86.3 54.4
108.9 68.1
121.0 74.9
102.6 66.8
131.1 85.0
147.8 94.7
91.5 56.3
112.5 68.8
123.0 74.4
114.0 72.4
142.9 90.2
158.3 99.1
134.6 88.7
170.2 112.3
190.6 124.6
104.1 64.4
128.5 78.7
140.4 85.4
126.8 80.8
158.7 100.4
175.9 110.4
149.7 98.8
188.7 125.1
211.5 138.7
285.0 145.4
179.1 110.1
195.5 119.5
175.9 112.7
219.7 140.2
243.5 153.8
206.7 137.8
260.0 173.8
289.5 192.1
0.09
0.15
0.21
0.21
0.32
0.44
0.36
0.54
0.71
0.09
0.15
0.21
0.21
0.32
0.44
0.36
0.54
0.71
0.11
0.18
0.24
0.21
0.32
0.44
0.36
0.54
0.71
0.11
0.18
0.24
0.21
0.32
0.44
0.36
0.54
0.71
0.12
0.19
0.26
0.21
0.32
0.11
0.36
0.54
0.71
0.12
0.19
0.26
0.21
0.32
0.44
0.36
0.54
0.71
13.9
13.9
13.9
13.9
13.9
13.9
13.9
13.9
13.9
14.3
14.3
14.2
14.2
14.2
14.2
14.2
14.2
14.2
14.6
14.6
14.6
14.6
14.6
14.6
14.6
14.6
14.6
12.7
12.7
12.7
12.7
12.6
12.6
12.7
12.6
12.6
12.9
12.9
12.9
12.9
12.9
12.9
12.9
12.8
12.8
13.8
13.8
13.8
13.8
13.7
13.7
13.7
13.7
13.7
61.5
54.2
51.0
66.0
58.7
55.0
69.1
62.0
58.2
61.5
54.3
51.0
66.1
58.8
55.2
69.2
62.1
58.4
62.4
55.2
51.9
66.2
58.9
55.3
69.3
62.3
58.5
63.0
55.8
52.7
66.7
59.7
56.3
69.8
63.1
59.6
63.3
56.3
53.0
66.7
59.9
56.4
69.8
63.2
59.7
63.6
56.7
53.4
67.1
60.3
56.9
70.2
63.7
60.4
57.8
52.8
50.4
61.1
56.7
54.1
63.2
59.3
56.9
57.8
52.9
50.5
61.2
56.7
54.2
63.3
59.4
57.0
58.6
53.7
51.3
61.2
56.9
54.3
63.4
59.5
57.1
59.0
54.4
51.9
61.6
57.5
55.2
63.8
60.3
58.2
59.3
54.7
52.3
61.7
57.7
55.4
63.8
60.4
58.3
59.5
55.1
52.8
62.0
58.1
55.8
64.1
60.8
58.9
59
65
70
59
65
70
59
65
70
66
72
79
66
72
79
66
72
79
72
80
88
72
80
88
72
80
88
92
103
113
92
103
113
92
103
113
99
111
123
99
111
123
99
111
123
126
143
160
126
143
160
126
143
160
➀ Refer to the BreezeTM AccuSpec selection software for additional ➁
➂
coil selections and performance at other conditions.
Coils are rated in compliance with ARI 410
Coil Circuiting Available: 1/4, 1/2, 3/4 (Performance data shown above), and Full Circuiting
56.1 33.7
64.5 38.3
67.6 39.9
77.9 48.0
93.3 56.5
100.1 60.1
95.1 60.2
116.0 72.1
126.7 77.7
67.2 40.4
77.2 45.8
80.9 47.8
93.2 57.5
111.1 67.6
119.8 71.9
113.2 71.8
138.4 86.3
151.4 92.9
84.8 51.2
98.4 58.6
103.5 61.3
109.6 67.6
130.8 79.4
140.7 84.5
133.1 84.5
162.4 101.3
177.2 109.1
112.8 68.4
130.8 78.3
138.4 82.1
144.4 90.0
172.2 105.7
185.5 112.5
174.3 112.1
211.5 133.8
231.4 144.1
128.9 78.3
149.9 89.9
158.7 94.5
160.8 100.2
191.5 117.7
206.4 125.1
193.3 124.6
235.0 149.1
255.9 160.0
179.6 109.6
209.0 125.9
222.0 132.5
222.7 139.7
265.0 163.9
286.2 174.5
265.5 173.3
322.0 206.3
351.0 221.8
0.14
0.23
0.31
0.31
0.49
0.65
0.55
0.82
1.07
0.14
0.23
0.31
0.31
0.49
0.65
0.55
0.82
1.07
0.16
0.26
0.36
0.31
0.49
0.65
0.55
0.82
1.07
0.16
0.26
0.36
0.31
0.49
0.65
0.55
0.82
1.07
0.17
0.28
0.39
0.31
0.49
0.65
0.55
0.82
1.07
0.17
0.28
0.39
0.31
0.49
0.65
0.55
0.82
1.07
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.0
16.6
16.6
16.5
16.5
16.5
16.5
16.5
16.5
16.5
17.1
17.1
17.1
17.1
17.1
17.1
17.1
17.1
17.0
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.4
14.4
14.9
14.8
14.8
14.8
14.8
14.8
14.8
14.8
14.7
16.2
16.2
16.1
16.1
16.1
16.1
16.1
16.1
16.0
54.6
49.0
47.1
59.0
52.6
49.9
62.2
22.7
52.6
54.6
49.2
47.2
59.1
52.8
50.1
62.3
55.8
52.7
55.5
49.8
47.8
59.2
52.9
50.2
62.4
56.0
52.9
56.1
50.4
48.3
59.8
53.7
51.0
63.1
56.9
54.0
56.5
50.8
48.6
59.9
53.8
51.2
63.3
57.1
54.3
56.9
51.2
48.9
60.4
54.4
51.8
63.8
57.8
55.0
53.0
48.7
47.0
56.6
51.9
49.8
59.0
54.7
52.3
53.1
48.8
47.1
56.7
52.1
49.8
59.2
54.8
52.4
53.9
49.4
47.6
56.7
52.2
50.0
59.3
54.9
52.6
54.3
50.0
48.1
57.3
53.0
50.8
59.9
55.9
53.6
54.7
50.4
48.5
57.4
53.2
51.0
60.0
56.0
53.9
55.0
50.8
48.8
57.8
53.7
51.5
60.5
56.7
54.7
Dry
Wt lbs
76
84
93
76
84
93
76
84
93
85
95
105
85
95
105
85
95
105
95
107
119
95
107
119
95
107
119
121
137
154
121
137
154
121
137
154
131
149
167
131
149
167
131
149
167
170
196
221
170
196
221
170
196
221
➃ Coil Rows Available: 4 and 6
➄ Fin Spacings Available: 6, 8, 10, 12, and 14
➅ 1 Ton = 12 MBH
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
67
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 68.1
DX Coil Drawing
Airflow Direction
(All dimensions in inches)
Rows 2 3 4 6
W 7.5 6 7.5 10
TOP VIEW
L
1.5
1.5
W
Distributor Inlet (Liquid
Line) Connection(s)
(Second Inlet on Dual
Circuit Coils)
S
Coil for Right Hand Units
(Digit 9 = R)
Headers on opposite
side for Left Hand Units
FL
FRONT VIEW
H
SIDE VIEW
FH
Airflow
Direction
1.5
Suction Line Connections in direction
of airflow
(Second Inlet on Dual Circuit Coils)
I
Table 68.1
DX Coil Dimensions
DX - Single Circuit
DX - Dual Circuit
Cooling
Suction Liquid Suction H
S
I
FH
FL
L
L
I
FL
MBH Line (Qty) Line (Qty)
Line (Qty) All
27.5 30.5 1.5
18
25 21
(1) 1.625 (1) 1.375 16.25 26.5 19.25 (2) 1.625
All
27.5 30.5 1.5
21
28 24
(1) 1.625 (1) 1.375 19.5 29.75 22.5 (2) 1.625
All
27.5 30.5 1.5
24
31 27
(1) 1.625 (1) 1.375 23 33.25 26.0 (2) 1.625
Below 185 32.5 34.5 0.5
27
34
30 (1) 1.625 (1) 1.375
MBH
25.5 35.75 28.5 (2) 1.625
200/225
185 MBH
32.5 34.5 0.5
27 34.5 30
(1) 2.125 (1) 1.375
& Up
Below 185
32.5 34.5 0.5
30
37
33 (1) 1.625 (1) 1.375
MBH
250/300
28.5 38.75 31.5 (2) 1.625
185 MBH
32.5 34.5 0.5
30 37.5 33 (1) 2.125 (1) 1.375
& Up
Below 185
32.5 34.5 0.5
42
49
45 (1) 1.625 (1) 1.375
MBH
40.25 50.5 43.25 (2) 1.625
350/400
185 MBH
32.5 34.5 0.5
42 49.5 45 (1) 2.125 (1) 1.375
& Up
Model
Size
75
100/125
150/175
Figure 68.2
Chilled Water Coil
Drawing
TOP VIEW
W
L
1.5
1.5
(2) 0.875
(2) 0.875
1.8
Rows 4 6
W 7.5 10
Return Water Line
Connection turned 90° in
direction of airflow
S
Coil for Right Hand Units
(Digit 9 = R)
Headers on opposite side for
Left Hand Units
2.25
FL
FRONT VIEW
SIDE VIEW
Supply Water Line
Connection turned 90° in
direction of airflow
2.25
I
Table 68.2
Chilled Water Coil Dimensions
1.8
Model Size
FH
H
S
V
FL
I
L
75
100/125
150/175
200/225
250/300
350/400
27
27
27
33
33
33
30
30
30
34.5
34.5
34.5
1.5
1.5
1.5
0.5
0.5
0.5
1.5
1.5
1.5
1
1
1
16.25
19.50
23.00
25.50
28.50
40.25
25.50
28.75
32.25
34.75
37.75
49.50
19.25
22.50
26.00
28.50
31.50
43.25
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Airflow
Direction
FH
H
V
68
(2) 0.875
Airflow Direction
(All dimensions in inches)
Liquid
Line (Qty)
(2) 0.875
(2) 0.875
(2) 0.875
Supply Line Return Line
1.50
1.50
1.50
1.50
1.50
1.50
MPT
MPT
MPT
MPT
MPT
MPT
1.50
1.50
1.50
1.50
1.50
1.50
MPT
MPT
MPT
MPT
MPT
MPT
Gas-Fired Indoor and Outdoor Duct Furnaces
Evaporative Cooling Module
All Outdoor models that include a blower section can be
provided with a factory installed and wired evaporative cooling
module. When applicable, evaporative cooling is one of the
most economical means of supplying conditioned air to a space.
Evaporative cooling works on the principle of exchanging
sensible heat from the entering warm air to latent heat of
vaporization of the cooling water. A special wetting media is
placed in the entering air stream of the cooling unit and water
is fed down the media. As the air passes through the media,
sensible heat from the air is simply transferred to the water in
the cooling media, causing the water to evaporate. Because the
sensible heat from the air is simply transferred to the water, and
both the water vapor and cooled air remain in the system, there
is no net energy change in the system. However, the dry bulb
temperature of the air has been lowered and provides cooling
for the space.
The temperature of the cooling air will be dependent on three
criteria. These criteria are:
1. The design dry bulb temperature
2. The design wet bulb temperature
3. The percent effectiveness of the cooling media
The design dry and wet bulb temperatures can be obtained
from the climactic table of the ASHRAE fundamentals. The
percent effectiveness of the cooling media is determined from
the media performance curves shown in Curve 70.1 for either
the 6" or 12" media based on the velocity across the media.
The velocity can be determined by dividing the desired cfm
of the unit by the face area of the cooling media for the unit.
The media face areas are shown in the Evaporative Cooler
Dimensional, Performance, and Weight Data Table 69.1. All
evaporative coolers are designed to meet face velocities of 800
feet per minute without water carryover, thus eliminating the
need for moisture elimination pads. For media pressure drops,
refer to the evaporative cooling pressure drops included with
the unit blower performance curves.
Evaporative coolers are available with 2 types of media:
1. Munters CELdek® Celluose 6" and 12" media providing
brand name media performance.
2. Munters GLASdek® Fiberglass 6" and 12" media which
is a fiberglass media material for applications requiring
UL 900, Class 2 fire rating and complies with NFPA
codes. Required for ETL certification of System units.
Standard Features
•
•
•
•
•
•
•
•
•
•
6" Munters CELdek® evaporative cooling media
18 gauge aluminized steel cabinet with a baked-on
polyester powder paint finish on exterior casing parts
304 stainless steel water reservoir
Factory installed and wired to electrical section terminal strip
Wire mesh birdscreen
Internal thermal overload protected motor
Front access to pump motor, media, and water connections
Float valve and bleed line
Adjustable leveling screws
Water inlet, drain, overflow connections (1/2" NPT)
Optional Features - Factory Installed
•
•
•
12" Munters CELdek® or 6" or 12" GLASdek® media
Pump motor for 230V/1Ph or 3/Ph operation
Step-down transformers (250 VA) for 208V/1Ph or
208V/460V/575V/3Ph
• Float switch - Prevents the pump motor from operating if the
water level in the reservoir is below the switch.
• 1" polyester cleanable pre-filter
Accessories - Field Installed
•
•
•
•
•
➀
Single stage duct thermostat
Manual remote operated fill and drain kit ➀
Manual remote operated fill and drain kit with freeze
protection ➀
Automatic remote operated fill and drain kit ➀
Automatic remote operated fill and drain kit with freeze
protection ➀
Valves rated for 50 psi maximum water pressure.
Evaporative Cooling Performance Example
Determine the final dry bulb temperature for a model OBG200
with a rated air capacity of 4321 cfm with 12" GLASdek media.
The unit is to be installed in Phoenix, Arizona. The ASHRAE
guide shows a design dry bulb temperature of 109°F and a
design wet bulb temperature of 71°F. This is plotted as Point A
on Figure 70.2. Also determine the apparent cooling capacity of
the evaporative cooler.
1. Determine the face velocity across the media located in
Table 69.1. Find the model size and blower type of the
selected unit and then find the corresponding media face
area (For the model size 200 and all blowers, the media
face area is 7.5 ft2 of media). To calculate the face velocity:
FPM = CFM / Media Face Area
or 4321 CFM / 7.5 ft2 = 576 FPM
2. Determine the media percent effectiveness. Enter Figure
70.1 at 576 FPM and follow up the graph until the FPM
line intersects with the 12" media % curve. At the point of
intersection, read across to the left and find the percent
effectiveness. For this example, the effectiveness is 89%.
3. Determine final dry bulb air temperature of conditioned air.
LAT = EAT DB - (% Eff. x (EAT DB - EAT WB))
LAT = 109°F - (0.89 x (109°F - 71°F)) = 75°F DB
Once the final dry bulb temperature has been determined,
the point of operation can be plotted on the psychrometric
chart. The LAT dry bulb is 75°F and the wet bulb remains
constant so it is 71°F. This is plotted as Point B on Figure
70.2.
4. Determine the cooling capacity of the unit. The cooling
capacity of the unit is defined as the apparent cooling
capacity because it is dependent on a specific set of
temperature conditions. As these conditions change, so
will the apparent cooling capacity.
Q = 1.08 x (EAT DB - LAT DB) x CFM
Q = 1.08 x (109°F - 75°F) x 4321 CFM = 158,667 Btu/Hr
5. Determine the pressure drop across the media and
birdscreen. This number must be added to the internal
static pressure of the unit when selecting a unit. This
information is required to make a proper motor selection.
The evaporative cooler pressure drop table can be found
on page 38. Note that if the optional pre-filters are used,
the proper pressure drop curve should be used.
Definition of Terms
EAT
= Entering Air Temperature
LAT
= Leaving Air Temperature
DB
= Dry Bulb
WB
= Wet Bulb
% Eff. = Percent Effectiveness
Q
= Apparent Cooling Capacity
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
69
Gas-Fired Indoor and Outdoor Duct Furnaces
Figure 70.1
Evaporative Cooling Effectiveness Curve
Figure 70.3
Evaporative Cooling Module
100%
Top View
90%
EVAPORATIVE COOLING
(% EFFECTIVENESS)
12'' MEDIA %
J-Box
1.25
Pump
80%
6'' MEDIA %
1/2" NPT Drain
1/2" NPT Water Inlet
1/2" NPT Overflow
70%
W/2
1.50
W
Optional 1"
Pre-Filter Rack
1.50
60%
100
200
300
400
500
600
700
800
1.50
AIR VELOCITY
(FEET PER MINUTE)
1.25
3.00
4.50
Side View
Blower Section
Figure 70.2
Psychrometric Chart
36.00
Grains of moisture per pound of dry air
200
190
180
um
ativ
eH
Rel
160
150
H
160
20%
lativ
Re
70
6" or 12"
Media
140
eH
um
idity
30%
50%
60
%
170
40%
70%
80
90%
80%
idity
Temperature Range 0 -160 F
Barometric Pressure 29.92 In. Mercury
B
120
10
re
tu
ra
60
90
te
m
pe
100
%
F
110
rw
et
-b
ulb
5%
A
wp
y
d of dr
r poun
70
80
90
100
110
120
130
15.0
60
14.5
50
14.0
40
13.5
30
5%
13.0
20
12.5
12.0
10
30%
10%
30
140
150
15.5
20
.25
40
c ft. pe
Cubi
%
90 %
70
50%
80%
60%
40%
20%
70
50
air
De
40
30
10
80
60
oin
to
50
Leveling Legs
20
10
160
25.50
Dry-bulb temperature F
Table 70.1
Evaporative Cooler Dimensional, Performance, and Weight Data (All dimensions in inches)
6" Media ➀12" Media ➀
Face Velocity
(Digit 23 = 3 or 5)
(Digit 23 = 4 or 6)
Model
Blower Type
Maximum
Media Face
at Max CFM
Dry
Operating
Dry
Operating
Size
(Digit 16)
H
W
Cooling CFM
Area (ft2)
(ft/min)
Weight
Weight
Weight
Weight
75
All
34
30
2778
4.0
695
149
273
154
285
100/125
All
34
30
4000
5.0
800
154
280
159
295
150/175
All
34
36
5200
6.5
800
159
313
169
336
200/225
All
38
36
6000
7.5
800
164
318
174
341
250/300
E,F,G, or H
38
39
6500
8.1
800
171
338
182
363
250/300
I, J, or K
56
39
10400
13.0
800
200
371
214
404
350/400
E,F,G, or H
38
51
8500
10.6
800
211
433
228
473
350/400
I, J, or K
47
51
11050
13.8
800
225
450
244
496
500/600
G or H
38
39
6500
8.1
800
171
338
182
363
500/600
I, J, K or L
56
39
10400
13.0
800
200
371
214
404
700/800
G or H
38
51
8500
10.6
800
211
433
228
473
700/800
I, J, K or L
47
51
11050
13.8
800
225
450
244
496
840/960
I, J, K or L
47
51
11050
13.8
800
225
450
244
496
➀ All weights in pounds.
70
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
Gas-Fired Indoor and Outdoor Duct Furnaces
These specifications cover unit(s) __________ shown on the equipment schedule
and in the plans.
General
A.
Standards
All unit(s) shall include:
A.1.
C.S.A. (Canadian Standards Association) design certification for use in
both the US and Canada to the ANSI Z83.8 - latest revision, standard
for “Gas Unit Heater and Gas-Fired Duct Furnaces” for safe operation,
construction, and performance.
A.2.
ETL certified duct furnace, blower, cooling, downturn, and evaporative
cooling sections to UL 1995/CSA C22.2 No. 236 “Heating and
Cooling Equipment” and UL 795 “Commercial - Industrial Gas Heating
Equipment” for electrical and mechanical safety.
C.
Outdoor Venting Arrangements
C.6.
The venting shall be a gravity vented arrangement with a combination
combustion air / exhaust vent cap that minimizes the pressure
differential between the inlet and exhaust of the venting system. This
pressure differential shall reduce the burner flame disturbance to insure
proper ignition when the unit is subjected to 40 mile per hour wind
velocities. The cap shall prevent rain from entering the unit through the
use of combustion air inlet louvers at a minimum of 6 inches from the
unit roof.
C.7.
The venting shall be a power exhausted arrangement. The unit shall be
tested to insure proper ignition when the unit is subjected to 40 mile per
hour wind velocities.
D. Indoor Unit Casing
D.1.
The duct furnace(s) unit casing shall be constructed of not less than 20
gauge aluminized steel.
B.
Mechanical Configuration
All unit(s) shall have right side (opt left side), when looking into the
discharge, access to all controls/venting and include:
D.2.
The blower and cooling sections shall be constructed of not less than
18 gauge aluminized steel.
B.1.
Furnace(s) section with 80% minimum efficiency provided by an
indirect-fired heat exchanger with dimpled tube pattern for efficient
heat transfer.
D.3.
All blower and cooling section exterior casing parts shall be painted
with a baked-on gray-green polyester powder paint (7 mil thickness) for
corrosion resistance.
B.2.
Blower section containing a supply blower and motor with bottom
support to provide rigidity. The blower connection shall be flexible with
1/4" gasket to prevent sound transmission into the supply ductwork.
D.4.
All blower and cooling section access side doors shall have heavy duty,
draw tight, quarter turn latches.
D.5.
B.3.
Electrical section isolated from the supply air stream including a hinged
access door. Separate knock-outs shall be provided for both high and
low voltage electrical connections. Provisions must be included for
side access electrical connections for slab mounted units and bottom
electrical connections for roof curb mounted or suspended units.
(opt) Blower and/or cooling sections shall include 1 inch, 1-1/2 lb
density acoustical and thermal insulation. The insulation shall be
made of glass fibers bonded with a thermosetting resin and overlaid
with a fire-resistant black acrylic coating for additional strength. The
acrylic coating must meet the requirements of ASTM C 665 for fungi
resistance.
B.4.
Cooling coil cabinet section shall be shipped attached to and
downstream of the heat exchanger. The blow through design shall
prevent condensation on the heat exchanger in the cooling mode.
The cabinet shall include a removable upper service access door and a
stationary piping connection door. The drain pan shall be 409 stainless
steel with drain and overflow connections.
(opt) The blower and/or cooling sections shall include double wall
construction in which 1 inch, 1-1/2 lb density insulation is covered by
a 22 gauge aluminized steel liner. The liner shall conform to ASHRAE
Standard 62-1989 Ventilation for Acceptable Indoor Air Quality.
Additional mechanical configurations for Outdoor only
D.6.
The duct furnace(s) shall include separate access doors for the power
exhauster, electrical controls, and gas train to allow for simplified
service of the unit.
All duct furnace(s) doors shall be fully gasketed to prevent infiltration of
the room air into the combustion process.
Additional Unit Casing for Separated Combustion
B.5.
Downturn plenum section for downward deflection of the supply air.
B.6.
Evaporative cooling section shall be factory installed and wired to the
terminal strip of the electrical section.
D.7.
B.7.
Rainhood and birdscreen shall be pre-assembled from the factory and
provided with internal baffles to prevent water entrainment in the supply
air stream.
Outdoor Unit Casing
D.8.
The unit casing shall be constructed of not less than 18 gauge steel.
Roof curb with wood nailing strips and assembly hardware. The
roof curb members shall be 16" high to meet the National Roofing
Contractors Association requirements and constructed from 16 gauge
aluminized steel. The curb shall include:
D.9.
All exterior casing parts shall be painted with a baked-on gray-green
polyester powder paint (7mil thickness) for corrosion resistance.
D.10.
All access side doors shall have heavy duty, draw tight, quarter turn
latches.
B.8.a.
(opt) insulation.
D.11.
B.8.b.
(opt) discharge air duct connector for field installation of ductwork prior
to unit arrival.
B.8.c.
(opt) return air duct connector for field installation of ductwork prior to
unit arrival.
Blower, cooling, and downturn sections when provided shall include 1
inch, 1-1/2 lb density acoustical and thermal insulation. The insulation
shall be made of glass fibers bonded with a thermosetting resin and
overlaid with a fire-resistant black acrylic coating for additional strength.
The acrylic coating must meet the requirements of ASTM C 665 for
fungi resistance.
D.12.
(opt) The blower, cooling, and downturn sections when provided shall
include double wall construction in which the standard insulation is
covered by a 22 gauge aluminized steel liner. The liner shall conform
to ASHRAE Standard 62-1989 Ventilation for Acceptable Indoor Air
Quality.
B.8.
C.
Indoor Gravity Vented Venting Arrangements
C.1.
The venting shall be gravity vented arrangement with a 45° angled
round vent connection to allow for tighter installation to duct system
components.
C.
Indoor Separated Combustion Venting Arrangements
C.2.
The unit casing shall be designed for the venting/ combustion air
arrangement to be separated from the room atmosphere. The unit shall
have a factory mounted power exhauster enclosed in the unit casing to
prevent the motor from being subjected to the room atmosphere. The
unit shall also include a factory mounted differential pressure switch
designed to prevent pilot and main burner ignition until positive venting
has been proven. A removable gasketed door shall contain both the
vent and combustion air connection collars to allow for servicing of the
power exhauster.
C.3.
The unit shall include a factory supplied horizontal concentric vent kit
allowing for a single penetration of the wall for both the combustion air
supply and flue product exhaust.
C.4.
The unit shall include a factory supplied vertical concentric vent kit
allowing for a single penetration of the roof for both the combustion air
supply and flue product exhaust.
C.5.
The unit shall include two factory supplied vent caps for both the
combustion air supply and flue product exhaust.
E.
Furnace Section
E.1.
The heat exchanger(s) shall be made of
20 gauge aluminized steel tubes and headers
(opt) 20 gauge 409 stainless steel tubes and headers
The thermal efficiency of the unit(s) shall be a minimum of 80%
efficient for all air flow ranges. The restrictor shall be sized to maintain
the unit(s) efficiency of 80% in the temperature range of 20°F-60°F or
20°F-100°F.
Each heat exchanger tube shall be individually and directly flame-fired.
The heat exchanger tube shall be contoured and dimpled to provide
efficient heat transfer and crimped to allow for thermal expansion
and contraction. The flue collector box shall be made of 20 gauge
aluminized steel.
E.2.
The heat exchanger(s) seams and duct connections shall be certified
to withstand 3.0" W.C. external static pressure without burner flame
disturbance.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
71
Gas-Fired Indoor and Outdoor Duct Furnaces
E.3.
The burner(s) shall be made of the same material as the heat
exchanger with a thickness of not less than 28 gauge. Burner(s) shall
have non-clogging, slotted ports with a stainless steel separator strip
designed for good lighting characteristics without noise of extinction
for both natural and propane gas. The burner(s) shall be located for
service removal without disconnecting the main gas supply piping.
E.10.f.
(opt) Electronic Modulation Slave gas controls with an electronic
modulating/regulating gas control, combination gas valve, and an
ignition control, but does not include a modulating amplifier and does
not require a discharge air thermostat. The modulating gas valve
receives the modulation percentage from the Master duct furnace.
Up to three Slave duct furnaces can be connected to one Master unit.
E.4.
The bottom of the unit shall be angled for draining any condensation
to the corners of the unit. The condensation shall be removed through
openings in the bottom pan. The drain pan shall be constructed of 20
gauge aluminized steel.
E.10.g.
(opt) 409 stainless steel.
E.5.
The gas manifold(s) piping shall allow for gas piping connection on the
side of the unit for slab mounted units and through the unit bottom for
roof curb mounted or suspended units. The manifold(s) shall include a
ground joint union for ease of servicing of the orifices without removing
the burner assembly or main gas valve string.
(opt) Electronic Modulation - 0-10 Vdc External Input. Allows for
control of the duct furnace firing rate by a Building Management
System (BMS). Utilizes an electronic modulating/regulating gas
control, combination gas valve, an ignition control, modulating signal
conditioner, and an inverted 0-10 Vdc input signal provided by a BMS
(0 Vdc being high fire and 10 Vdc being low fire). The gas controls
can modulate the gas flow between 40% and 100% full fire. When the
BMS thermostat (supplied by others) is satisfied, the BMS heat contact
(supplied by others) opens to cut power to the combination gas valve
which prevents gas flow to both the main and pilot burners.
E.6. The orifices shall be provided on both natural and propane gas with
adjustable air shutters for controlling the primary air mixture.
E.10.h.
The ignition control(s) shall be standing pilot for natural gas
(opt) The ignition control(s) shall be standing pilot for propane gas
E.7.
The ignition controller(s) shall be 100% shut-off with continuous retry
for natural gas.
(opt) The ignition controller(s) shall be 100% shut-off with lockout for
propane gas.
E.8.
The gas pressure shall be between 6-7" W.C for natural gas.
(opt) Electronic Modulation - 4-20 mA External Input. Allows for
control of the duct furnace firing rate by a Building Management
System (BMS). Utilizes an electronic modulating/regulating gas
control, combination gas valve, an ignition control, modulating signal
conditioner, and an inverted 4-20 mA input signal provided by a BMS
(4 mA being high fire and 20 mA being low fire). The gas controls can
modulate the gas flow between 40% and 100% full fire. When the BMS
thermostat (supplied by others) is satisfied, the BMS heat contact
(supplied by others) opens to cut power to the combination gas valve
which prevents gas flow to both the main and pilot burners.E.11.
A 1/8" manifold pressure tap shall be located after all valves to test the
manifold pressure directly before the main burner orifices.
(opt) The gas pressure shall be 11-14" W.C. for propane gas.
E.11.
E.9.
The solid state ignition system shall intermittently light the pilot each
time the system is energized. Once the pilot is proven, the main gas
valve shall open and allow gas flow to the main burner.
A 1/8'' manifold pressure tap shall be located after all valves to test the
manifold pressure directly before the main burner orifices.
E.12.
The unit shall be provided with a single gas control transformer to step
down the supply voltage to 24V.
E.10.
The unit gas controls shall be provided with the following:
E.13.
E.10.a.
Single-stage gas controls with a single-stage combination gas control,
an ignition control, and a single-stage low voltage thermostat. The unit
fires at 100% full fire based on a call for heat from a room thermostat.
Separate line voltage and low voltage terminal strips shall be provided
to prevent the unit from being miswired for premium unit and low
voltage terminals for standard units.
E.14.
Automatic reset high limit switch.
E.10.b.
(opt) Two-stage gas controls with a two-stage combination gas control,
an ignition control, and a two-stage low voltage thermostat. The unit
fires at 50% fire on low stage or 100% fire on high stage of the unit
based on the call for heat from either a room or duct thermostat.
(opt) Manual reset high limit switch.
E.15.
Provide the following factory installed options:
E.15.a
(opt) A low gas pressure switch(s) prevents the burner from firing if the
inlet gas pressure is below the minimum gas pressure.
E.15.b.
(opt) A high gas pressure switch(s) which prevents the burner from
firing if the manifold gas pressure is above the maximum manifold gas
pressure.
E.15.c.
(opt) An air flow proving switch shall be an adjustable differential
pressure switch to insure air flow across the heat exchanger before
allowing the gas controls to be energized.
E.15.d.
(opt) A timed freeze protection discharge air thermostat used to
prevent building freeze up in the event of a burner failure. The timer
shall be adjustable from 1 to 5 minutes.
(opt) Electronic modulation gas controls with an electronic modulating/
regulating gas control, combination gas valve, an ignition control,
modulating amplifier, and either a modulating room thermostat or
modulating duct thermostat with remote temperature set point adjuster.
The thermostat can modulate the system gas flow between 40%
through 100% full fire. The firing rate shall be controlled by a
E.15.e.
(opt) A manual reset supply air fire stat shall shut the system down if
the temperature at the limit switch location exceeds 200°F.
E.15.f.
(opt) A time delay relay which delays the start of the blower to allow the
heat exchanger a warm-up period after a call for heat. The time delay
relay shall also continue the blower operation after the thermostat has
been satisfied to remove any residual heat on the heat exchanger.
(opt) duct sensor with remote temperature adjuster.
E.16.
The unit shall be orificed for up to 2000' elevation above sea level.
(opt) duct sensor with remote temperature adjuster and room override
thermostat.
(opt) The unit shall be orificed for _____ elevation above sea level.
(opt) room thermostat.
E.10.c.
E.10.d.
E.10.e.
(opt) Mechanical modulation gas controls with a mechanical modulating
gas control and an ignition control. The discharge air temperature is
maintained by setting the non-electric control dial of the modulating
gas valve in one of ten positions ranging from Lo to Hi. A hydrostatic
sensing bulb that is mechanically attached to the modulating gas valve
is factory installed in the discharge air stream and modulates the gas
flow. Modulation occurs between 40% through 100% full fire. When the
discharge air hydrostatic sensing bulb is satisfied, the modulating valve
closes completely. The hydrostatic sensing bulb is included with the
system. Because this control is non-electric, it cannot be used with a
room override thermostat.
(opt) Electronic Modulation Master gas controls with an electronic
modulating/ regulating gas control, combination gas valve, an ignition
control, modulating amplifier and either a modulating room thermostat
or modulating duct thermostat with remote temperature set point
adjuster. The thermostat can modulate the gas flow between 40%
through 100% full fire. Allows one duct sensing thermostat to control
the firing rate of the Master duct furnace and up to three Slave duct
furnaces. The Master furnace sends a signal to all of the gas valves
so that they modulate at the same percentage. When the thermostat
is satisfied, the amplifier cuts power to the combination gas valves of
the Master unit and all Slave units which prevents gas flow to both the
main an pilot burners. The firing rate shall be controlled by a
(opt) duct sensor with remote temperature adjuster.
(opt) duct sensor with remote temperature adjuster and room override
thermostat.
(opt) room thermostat.
72
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
F.
Electrical Section
F.1.
All electrical components shall carry UL, ETL, or CSA listing.
F.2.
The unit shall be supplied with a disconnect switch to disconnect power
to the unit for servicing. The disconnect switch style shall be
(a)
dead front fusible.
(b)
dead front circuit breaker.
(c)
field installed non-fusible box type.
(d)
field installed fusible box type.
F.3.
F.4.
A single step down transformer shall be provided for all unit controls.
For 460V and 575V units, a step down transformer from line voltage to
115V shall be provided for operation of the power exhauster motor.
Gas-Fired Indoor and Outdoor Duct Furnaces
G. Blower Section
G.1.
G.4.m.
Air Control GB = The unit shall be provided with fresh air and return air
dampers with a modulating damper motor with 4-20 mA external input
signal control.
G.4.n.
Air Control GC = The unit shall be provided with fresh air and return air
dampers with a modulating damper motor with minimum positioner.
G.4.o.
Air Control GD = The unit shall be provided with fresh air and return air
dampers with a modulating damper motor with remote positioner.
G.4.p.
Air Control GE = The unit shall be provided with fresh air and return air
dampers with a modulating damper motor for three positions.
G.4.q.
Air Control GF = The unit shall be provided with fresh air and return
air dampers with a modulating damper motor with A350P proportional
temperature controller.
G.4.r.
Air Control GG = The unit shall be provided with fresh air and return air
dampers with a modulating damper motor with minimum positioner and
A350P proportional temperature controller.
G.4.s.
Air Control GH = The unit shall be provided with fresh air and return air
dampers with a modulating damper motor with remote positioner and
A350P proportional temperature controller.
G.4.t.
Air Control GJ = The unit shall be provided with fresh air and return
air dampers with a modulating damper motor with fresh air enthalpy
controller.
G.4.u.
Air Control GK = The unit shall be meet ASHRAE Cycle II and be
provided with fresh air and return air dampers with modulating
a damper motor with minimum positioner, A350P proportional
temperature controller, and warm-up thermostat.
The blower motor shall meet the following requirements.
G.1.a.
The
blower motor type shall be
(a) Single-speed, open drip proof (ODP)
(b) Single-speed, totally enclosed (TE)
(c) Single-speed, ODP, high efficiency
(d) Single-speed, TE, high efficiency
(e) Two-speed, ODP, 1800/900 rpm
(f) Two-speed, ODP, 1800/1200 rpm
(g) Two-speed, TE, 1800/900 rpm
(h) Two-speed, TE, 1800/1200 rpm
G.1.b.
The
G.1.c.
The
motor
(a)
(b)
(c)
(d)
motor
shall be rated for
115V/60Hz/1Ph
(e)
208V/60Hz/1Ph
(f)
230V/60Hz/1Ph
(g)
208V/60Hz/3Ph
horsepower shall be ____.
230V/60Hz/3Ph
460V/60Hz/3Ph
575V/60Hz/3Ph
G.1.d.
The motor wiring shall be in flexible metal BX conduit.
G.1.e.
The motor shall be provided with an adjustable motor sheave to allow
for minor adjustment of the blower rpm at the job site.
G.1.f.
The motor shall be controlled by a time delay relay
(opt) and motor starter.
(opt) and variable frequency drive.
G.4.v.
G.2.
The unit shall contain a single supply blower that is supported from
the bottom to prevent the blower flanges supporting the weight of the
motor. The blower shall be a double width, double inlet (DWDI), forward
curved, belt driven, assembly with
Air Control GM = The unit shall meet ASHRAE Cycle II and be
provided with fresh air and return air dampers with a modulating
damper motor with remote positioner, A350P proportional temperature
controller, and warm-up thermostat.
G.4.w.
(std) spider ball bearings.
(opt) heavy duty, pillow block ball bearings.
(opt) motor and blower vibration isolation using rubber-in-shear
grommets.
Air Control GN = The unit shall meet ASHRAE Cycle III and be
provided with fresh air and return air dampers with a modulating
damper motor with A350P proportional temperature controller, and
warm-up thermostat.
G.4.x.
(opt) extended grease lines which include external zerk fittings for
applying grease.
Air Control HP = The unit shall be provided with fresh air and return air
dampers with a floating damper motor with photohelic space pressure
controller.
G.4.y.
Air Control JA = The unit shall be provided with manual fresh air and
return air dampers.
G.4.z.
Air Control KA = The unit shall be provided with manual fresh air
dampers and return air opening.
G.3.
(opt) The unit shall be provided with a filter rack with
(a) 1" permanent filters
(c) 2" FARR® Aeropleat 3 filters
(b) 2" permanent filters
(d) 2" FARR® 30/30 filters
G.4.
(opt) Dampers and Damper Controllers
G.5.
The unit shall be provided with the following factory installed options:
G.4.a.
All fresh air dampers are ultra low leak, Class II leakage resistance
(less than 10 CFM/ft2 at 1" W.C.) dampers with self-compensating
stainless steel side seals and santoprene and galvanized steel blade
seals. All return air dampers, which are used for air balancing, shall
be low leak, Class III leakage resistance (less than 40 CFM/ft2 at 1"
W.C.) dampers with self-compensating stainless steel side seals and
santoprene blade seals.
G.5.a.
(opt) A mild temperature thermostat used to automatically lock out the
gas controls when the outdoor temperature reaches the desired set
point.
G.5.b.
(opt) A manual reset return air fire stat that shuts the system down if
the temperature in the blower section exceeds 120°F.
G.5.c.
The damper actuator shall be mounted directly to the shaft of the fresh
air damper. If return air dampers are provided, a damper linkage rod
shall be provided to set the positions of the opposed dampers.
(opt) A blower door safety switch that breaks power to the unit low
voltage control circuit when the blower door is opened. The switch can
be manually overridden for servicing.
G.5.d.
G.4.c.
The damper actuator shall be spring return so when power is
disconnected, the damper closes the outside air opening.
(opt) A set of three service switches for manual operation of the
damper, blower, and burner by service personnel.
G.5.e.
G.4.d.
All two-position damper actuators shall have one normally open and
one normally closed end switch to prove that the damper has opened.
(opt) A convenience outlet with a 115V GFCI service receptacle
mounted in the blower compartment for a separate 115V power supply.
G.5.f.
G.4.e.
Air Control AA - The unit shall be provided with a return air opening in
the bottom of the unit.
(opt) A two-position damper limiter to manually fix the percentage of
outside air for units with two-position fresh and return air dampers.
G.5.g.
G.4.f.
Air Control BA - The unit shall be provided with a fresh air opening in
the back of the unit.
(opt) A dirty filter pressure switch with an adjustable pressure switch
with pick-up tubes to monitor the filter pressure drop and energize a
remote panel light if the set pressure is exceeded.
G.4.g.
Air Control CA = The unit shall be provided with fresh air and return air
openings in both the bottom and the back of the unit.
G.5.h.
(opt) A circuit analyzer consisting of (6, 10, or 14) lights that step
through the sequence of operation for service personnel.
G.4.h.
Air Control DA = The unit shall be provided with fresh air dampers with
a two-position damper motor with no return air.
G.5.i.
G.4.i.
Air Control EA = The unit shall be provided with fresh air and return air
dampers with a two-position damper motor.
G.4.j.
Air Control EQ = The unit shall meet ASHRAE Cycle I and be provided
with fresh air and return air dampers with a two-position damper motor
with warm-up thermostat.
(opt) A fresh air discharge damper that is ultra low leak, Class II
leakage resistance (less than 10 CFM/ft2 at 1" W.C.) dampers with
self-compensating stainless steel side seals and santoprene and
galvanized steel blade seals. The damper actuator shall be mounted
directly to the shaft of the fresh air discharge damper. The damper
actuator shall be spring return so when power is disconnected, the
damper closes the outside air opening. The damper actuator shall
have one normally open and one normally closed end switch to
prove that the damper has opened.
G.4.k.
Air Control FA = The unit shall be provided with fresh air dampers and
return air opening with a two-position damper motor.
G.4.b.
G.4.l.
Air Control GA = The unit shall be provided with fresh air and return air
dampers with a modulating damper motor with 0-10 Vdc external input
signal control.
H.
Mounting Base
H.1.
The unit shall be provided with a 14 gauge, galvanized steel, rail type mounting base for slab installation with lifting and anchoring holes.
H.2.
The unit shall be provided with a 14 gauge, galvanized steel,
combination curb and slab type mounting base with lifting and
anchoring holes.
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
73
Gas-Fired Indoor and Outdoor Duct Furnaces
I. Evaporative Cooler for Outdoor Only
J.11.
A remote panel with the following
I.1.
The unit shall be provided with
(a) 6" Munters CELdek® media
J.11.a.
___ indicator lights
(c) 6" Munters GLASdek® media
(b) 12" Munters CELdek® media (d) 12" Munters GLASdek® media
J.11.b.
___ three position switch
J.11.c.
___ two position switches
The casing of the evaporative cooler shall be 18 gauge aluminized
steel with a baked-on polyester power paint (7 mil thickness) for
corrosion resistance.
J.11.d.
___ thermostat
J.11.e.
___ minimum damper positioner
I.3.
The water reservoir shall be 18 gauge 304 stainless steel.
I.4.
The unit shall include a wire mesh birdscreen that is removable to
allow front access to the pump motor, media, and water connections.
K. I.5.
The pump motor shall have internal thermal overload protection.
I.6.
Field adjustable leveling screws shall be provided to support the weight
of the evaporative cooler on the roof.
I.7.
The evaporative cooler will be provided with the following factory
installed controls:
I.7.a.
A step down transformer for the pump motor.
I.7.b.
A 1" permanent polyester cleanable pre-filter to prevent debris from
entering the unit.
I.7.c.
A float switch to prevent the pump motor from operating if the water
level in the reservoir is below the switch.
I.8.
The evaporative cooler will be provided with the following field installed
controls:
I.8.a.
A single stage duct thermostat to control the operation of the pump
motor.
I.8.b.
A manually operated remote fill and drain kit to fill the water reservoir
when the unit is in cooling mode. When not in operation, the water shall
be drained to prevent the recirculation of stagnant water.
I.8.c.
A manually operated remote fill and drain kit with freeze protection to
fill the water reservoir when the unit is in cooling mode. When not in
cooling mode, the water shall be drained to prevent the recirculation
of stagnant water. The freeze thermostat shall prevent the evaporative
cooler from filling when the outside air temperature is below the set
point.
I.2.
I.8.d.
An automatic fill and drain kit to fill the water reservoir, controlled by
a time clock, when the unit is in cooling mode. When not in cooling
mode, the water shall be drained to prevent the recirculation of
stagnant water.
I.8.e.
An automatic fill and drain kit with freeze protection to fill the water
reservoir, controlled by a time clock, when the unit is in cooling mode.
When not in cooling mode, the water shall be drained to prevent the
recirculation of stagnant water. The freeze thermostat shall prevent
the evaporative cooler from filling when the outside air temperature is
below the set point.
Thermostats
The unit shall be provided with the following thermostat
K.1.
A single stage room thermostat with a 55°-95°F range.
K.2.
A single stage room thermostat with a 45°-75°F range
K.3.
A single stage room thermostat with a 45°-75°F range with sub-base
for System auto/off and Fan auto/on control.
K.4.
A 7-day programmable room thermostat with with one heat and one
cool stage. The thermostat shall have Fan on/auto and System heat/
off/cool/auto switching. Programmable for 2 to 4 events per day with
override feature and one auxiliary output terminal for damper control.
K.5.
A two-stage room thermostat with a 42°-88°F range.
K.6.
A two-stage room thermostat with a 42°-88°F range with sub-base for
System auto/off and Fan auto/on control.
K.7.
A 7-day programmable room thermostat with with two heat and two
cool stages. The thermostat shall have Fan on/auto and System heat/
off/cool/auto switching. Programmable for 2 to 4 events per day with
override feature and one auxiliary output terminal for damper control.
K.8.
A factory installed two-stage duct thermostat with a 0°-100°F range
and 20 foot capillary.
K.9.
A field installed two-stage duct thermostat with a 0°-100°F range and
20 foot capillary.
K.10. A factory installed two-stage duct thermostat with a 55°-175°F range
and 20 foot capillary.
K.11.
A field installed two-stage duct thermostat with a 55°-175°F range and
20 foot capillary.
K.12.
A two-stage electronic duct thermostat with factory installed
temperature sensor and field installed temperature selector and one
(up to five) stage adder.
K.13.
A two-stage electronic duct thermostat with field installed temperature
sensor, temperature selector and one (up to five) stage adder.
K.14.
A factory installed electronic modulating duct thermostat with a range
of 55°-90°F.
K.15.
A remote set point adjuster for the electronic modulating duct
thermostat.
J.
Accessory Control Devices
K.16.
The following field installed accessory control devices shall be provided
with the unit:
A field installed electronic modulating duct thermostat and set point
adjuster with a range of 55°-90°F.
K.17.
J.1.
A digital 7-day / 24-hour timer with SPDT switching. The timer shall
have 16 programming set points with 7-day power outage carry-over.
A room override thermostat with a range of 40°-90°F for use with the
electronic modulating duct thermostat.
K.18.
An electronic modulating room thermostat with a 60°-85°F range.
J.2.
A push pin style appliance timer with SPST switching with 12 settings
per day (2 hour per pin time increments).
L.
Cooling Coil
J.3.
A mild temperature thermostat used to automatically lock out the gas
controls when the outdoor temperature reaches the desired set point.
L.1.
J.4.
A low profile duct style photoelectronic smoke detector with two DPDT
contacts.
A direct expansion (DX) single circuit cooling coil that is rated in
compliance with ARI 410. The coil shall have 0.016 copper tubes with
0.0075 aluminized steel fins. The coil casing shall be galvanized steel
with mounting flanges.
L.2.
A direct expansion (DX) dual circuit cooling coil that is rated in
compliance with ARI 410. The coil shall have 0.016 copper tubes with
0.0075 aluminized steel fins. The coil casing shall be galvanized steel
with mounting flanges.
L.3.
A chilled water cooling coil that is rated in compliance with ARI 410.
The coil shall have 0.020 copper tubes with 0.0075 aluminized steel
fins. The coil casing shall be galvanized steel with mounting flanges.
J.4.a.
A smoke detector tube extension for duct widths between 1 to 2 feet.
J.4.b.
A smoke detector tube extension for duct widths between 2 to 4 feet.
J.4.c.
A smoke detector tube extension for duct widths between 4 to 8 feet.
J.5.
A freeze stat to shut the fresh air dampers if the outside temperature
falls below the set point.
J.6.
A 1-5 psi gas pressure regulator to reduce the inlet gas pressure for
the operating controls.
J.7.
A clear plastic thermostat guard with two keys for room thermostats.
J.8.
A DPDT summer winter switch for continuous fan in the summer
position and intermittent fan and burner in the winter position.
J.9.
A remote manual positioner for controlling the percentage of fresh and
return air on units provided with modulating damper actuators.
J.10.
A 4 foot vent extension to increase the height of the unit exhaust.
74
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
The unit shall be provided with a factory installed cooling coil with a
face velocity not to exceed 550 feet per minute.
Gas-Fired Indoor and Outdoor Duct Furnaces
1
PT
2
3
4 5 6
7
8
9
10
11
12
13
14
15
16
17
18
19 20 21 22
UC
V
MBH
HE
DS
AS
ATR
GT
GV
SS
SV
TR
BB
HP
MT
SA
1 - Product Type (PT)
I - Indoor HVAC Unit
O- Outdoor HVAC Unit
2 - Unit Configuration (UC)
F - Furnace
B - Blower Package - Furnace & Blower
C - Cooling Package - Furnace, Blower, & Cooling Cabinet
D - Downturn Package - Furnace, Blower, & Downturn
P - Packaged Unit - Furnace, Blower, Cooling Cabinet, & Downturn
3 - Venting (V)
G- Gravity
P - Power
4,5,6
100
175
250
400
-
-
-
-
-
S - Separated Combustion
Furnace Input Rating (MBH) (Output on 840 & 960)
100,000 Btu/Hr Input
500 - 500,000 Btu/Hr Input
175,000 Btu/Hr Input
600 - 600,000 Btu/Hr Input
250,000 Btu/Hr Input
840 - 1,050,000 Btu/Hr Input
400,000 Btu/Hr Input
960 - 1,200,000 Btu/Hr Input
7 - Heat Exchanger/Burner/Drip Pan Material (HE)
A - Aluminized Steel
S - 409 Stainless Steel Heat Exchanger/Burner
T - 409 Stainless Steel Heat Exchanger/Burner/Drip Pan
8 - Development Sequence Designation (DS)
F - Single Stage
M- 2-stage or Modulating
9 - Access Side (AS)
R - Right Hand
L - Left hand
10 - Air Temperature Rise (ATR)
H - High 60°-100°F
L - Low 20°-60°F
N - Not Used (Indoor Gravity Vented Only)
11- Gas Type (GT)
N - Natural with ignition controller
S - Natural with standing pilot
P - Propane with ignition controller
T - Propane with standing pilot
12 - Gas Valve (GV)
1 - Single Stage
5 -
2 - Two Stage
6 -
3 - Mechanical Modulation7 -
4 - Electronic Modulation 8 -
Electronic Modulation Master
Electronic Modulation Slave
Electronic Modulation 0-10 Vdc External Input
Electronic Modulation 4-20 mA External Input
13 - Additional Safety Switches (SS)
4 - No Switches (Standard) 1 - Low Gas Pressure Switch (Premium)
0 - No Switches (Premium) 2 - High Gas Pressure Switch (Premium)
3 - High and Low Gas Pressure Switch (Premium)
14 - Supply Voltage (SV)
A - 115/60/1
B - 208/60/1
C - 230/60/1
D - 200-208/60/3
E - 230/60/3
F - 460/60/3
G- 575/60/3
15 - Transformer (TR)
1 - 40 VA
2 - 75 VA
3 - 150 VA
4 - 250 VA
0 - None
AC
23
EC CC
16- Blower Size & Bearing Type (BB)
A - 9-7 Spider Bearings
G- 15-15 Spider Bearings
B - 9-7 Pillow Block Bearings
H - 15-15 Pillow Block Bearings
C - 9-9 Spider Bearings
I - 18-18 Spider Bearings under 15 Hp
D - 9-9 Pillow Block Bearings
J - 18-18 Pillow Block Bearings under 15 Hp
E - 12-12 Spider BearingsK - 18-18 Pillow Block Bearings for 15 Hp & up
F - 12-12 Pillow Block Bearings L - 20-18 Pillow Block Bearings
17- Motor Horsepower (HP)
A - 1/3 Hp
B - 1/2 Hp
C - 3/4 Hp
D - 1 Hp
E - 1-1/2 Hp
F - 2 Hp
G- 3 Hp
H - 5 Hp
I - 7-1/2 Hp
J - 10 Hp
K - 15 Hp
V - 20 Hp
L - 1/3 Hp with Motor Starter
M- 1/2 Hp with Motor Starter
N - 3/4 Hp with Motor Starter
P - 1 Hp with Motor Starter
Q- 1-1/2 Hp with Motor Starter
R - 2 Hp Hp with Motor Starter
S - 3 Hp with Motor Starter
T - 5 Hp with Motor Starter
W- 7-1/2 Hp with Motor Starter
X - 10 Hp with Motor Starter
Y - 15 Hp with Motor Starter
Z - 20 Hp with Motor Starter
O- Other
18- Motor Type (MT)
1 - ODP
2 - ODP - High Eff.
3 - ODP, 1800/900 RPM
4 - ODP, 1800/1200 RPM
5 - TE
6 - TE - High Eff.
7 - TE, 1800/900 RPM
8 - TE, 1800/1200 RPM
0 - Special
19 - Sheave Arrangement (SA)
A - (See Sheave Tables)
20,21 - Air Control (AC)
AA - RA Opening
BA - FA Opening
CA - FA & RA Openings
DA - FA Dampers w/ 2 pos motor (No RA)
EA - FA & RA Dampers w/ 2 pos motor
EQ- ASHRAE Cycle I - (“EA” with Warm-up Stat)
FA - FA Damper & RA Opening w/ 2 pos motor
GA- FA & RA Mod motor w/ 0-10 Vdc External Input
GB- FA & RA Mod motor w/ 4-20 mA External Input
GC- FA & RA Mod motor w/ Minimum Position
GD- FA & RA Mod motor w/ Remote Position (On Remote Panel)
GE- FA & RA Mod motor w/ 3 pos. damper (100% RA, Variable, 100% OA)
GF - FA & RA Mod motor w/ A350P Proportional Temp Controller
GG- FA & RA Mod motor w/ Minimum Position & Prop. Temp Controller
GH- FA & RA Mod motor w/ Remote Position & Prop. Temp Controller
GJ - FA & RA Mod motor w/ FA Enthalpy Controller
GK- ASHRAE Cycle II - (“GG” with Warm-up Stat)
GM- ASHRAE Cycle II - (“GH” with Warm-up Stat)
GN- ASHRAE Cycle III - (“GF” with Warm-up Stat)
HP - FA & RA Floating motor w/ Space Pressure Controller
JA - Manual FA & RA Dampers
KA - Manual FA Damper with Return Air Opening
OA - Other
22 - Evaporative Cooling (EC)
3 - 6" CELdek Media
4 - 12" CELdek Media
5 - 6" GLASdek Media
6 - 12" GLASdek Media
0 - None
23 - Cooling Coil (CC)
0 - None
1 - Factory Installed Coil
Gas-Fired Indoor and Outdoor Duct Furnaces
Technical Manual : AIR 5-173.4
75
Commercial HVAC&R Division
Modine Manufacturing Company
1500 DeKoven Avenue
Racine, WI 53403-2552
Phone: 1.866.823.1631 (toll free)
Fax: 1.800.204.6011
www.airedaleusa.com
A
Company
© Modine Manufacturing Company 2006
XX/XX - XXM Lito in USA
3M Litho in USA
AIR 5-173.4
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