York | DH 240 | Installation manual | York DH 240 Installation manual

York DH 240 Installation manual
INSTALLATION
MANUAL
SUNLINE ULTRA™
GAS/ELECTRIC SINGLE PACKAGE
AIR CONDITIONERS
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
MODELS: DH180, 210 & 240
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . . . .6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . .50
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . .51
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . .53
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
The installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes are intended to
clarify or make the installation easier. Cautions are given
to prevent equipment damage. Warnings are given to
alert installer that personal injury and/or equipment damage may result if installation procedure is not handled
properly.
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
129963-YIM-A-0605
129963-YIM-A-0605
TABLE OF CONTENTS
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 4
SEQUENCE OF OPERATIONS OVERVIEW. . . . . . 44
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
COOLING SEQUENCE OF OPERATION . . . . . . . . 44
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
RENEWAL PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
PRODUCT NOMENCLATURE. . . . . . . . . . . . . . . . . . . . . . . 6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
INSTALLATION SAFETY INFORMATION . . . . . . . . 14
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . 16
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
FIXED OUTDOOR AIR INTAKE DAMPER . . . . . . . . 17
SAFETY CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . 46
CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . 18
COMPRESSOR PROTECTION . . . . . . . . . . . . . . . . 46
COMPRESSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
SERVICE ACCESS . . . . . . . . . . . . . . . . . . . . . . . . . . 18
THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
ELECTRIC HEATING SEQUENCE OF
OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
POWER AND CONTROL WIRING . . . . . . . . . . . . . . 20
HEATING OPERATION ERRORS . . . . . . . . . . . . . . 47
OPTIONAL ELECTRIC HEAT . . . . . . . . . . . . . . . . . . 20
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . 47
OPTIONAL GAS HEAT . . . . . . . . . . . . . . . . . . . . . . . 21
SAFETY CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . 47
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
GAS CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . 21
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
L.P. UNITS, TANKS AND PIPING. . . . . . . . . . . . . . . 22
HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . . . 47
VENT AND COMBUSTION AIR HOODS . . . . . . . . . 23
GAS HEATING SEQUENCE OF OPERATIONS . . . 48
OPTIONAL ECONOMIZER/MOTORIZED
DAMPER RAIN HOOD . . . . . . . . . . . . . . . . . . . . . . . 23
GAS HEATING OPERATION ERRORS. . . . . . . . . . 49
OPTIONAL POWER EXHAUST/BAROMETRIC
RELIEF DAMPER AND RAIN HOOD . . . . . . . . . . . . 24
TEMPERATURE LIMIT . . . . . . . . . . . . . . . . . . . . . . . . 49
GAS VALVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
SAFETY CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . 49
OPTIONAL ECONOMIZER AND POWER EXHAUST
DAMPER SET POINT ADJUSTMENTS AND
INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
MINIMUM POSITION ADJUSTMENT . . . . . . . . . . . . . 24
ENTHALPY SET POINT ADJUSTMENT. . . . . . . . . . . 24
POWER EXHAUST DAMPER SETPOINT
(WITH OR WITHOUT POWER EXHAUST). . . . . . . . . 24
HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . . . 50
RESETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
PRESTART CHECK LIST . . . . . . . . . . . . . . . . . . . . 50
OPERATING INSTRUCTIONS. . . . . . . . . . . . . . . . . 50
INDOOR AIR QUALITY AQ. . . . . . . . . . . . . . . . . . . . 24
POST START CHECK LIST . . . . . . . . . . . . . . . . . . . 50
CFM, STATIC PRESSURE, AND POWER ALTITUDE AND TEMPERATURE CORRECTIONS . 33
SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
PHASING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
CHECKING SUPPLY AIR CFM. . . . . . . . . . . . . . . . . 42
AIR BALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
2
CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . 44
INTERMITTENT BLOWER . . . . . . . . . . . . . . . . . . . . . 44
NO OUTDOOR AIR OPTIONS . . . . . . . . . . . . . . . . . . 44
ECONOMIZER WITH SINGLE ENTHALPY
SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
ECONOMIZER WITH DUAL ENTHALPY SENSORS. 45
ECONOMIZER (SINGLE OR DUAL) WITH POWER
EXHAUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
MOTORIZED OUTDOOR AIR DAMPERS . . . . . . . . . 45
COOLING OPERATION ERRORS . . . . . . . . . . . . . . . 45
HIGH-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . 45
LOW-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . 45
FREEZESTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
LOW AMBIENT COOLING . . . . . . . . . . . . . . . . . . . . . 46
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . . . . 51
PRE-START CHECK LIST . . . . . . . . . . . . . . . . . . . . 51
OPERATING INSTRUCTIONS. . . . . . . . . . . . . . . . . 51
Unitary Products Group
129963-YIM-A-0605
LIST OF TABLES
TO LIGHT PILOT AND MAIN BURNERS . . . . . . . . . . 51
TO SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
POST-START CHECK LIST (GAS) . . . . . . . . . . . . . . 51
Tbl. #
MANIFOLD GAS PRESSURE ADJUSTMENT . . . . . 51
1
UNIT APPLICATION DATA . . . . . . . . . . . . . . . . . . . . 15
PILOT CHECKOUT . . . . . . . . . . . . . . . . . . . . . . . . . . 52
2
CONTROL WIRE SIZES. . . . . . . . . . . . . . . . . . . . . . . 20
BURNER INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . 52
3
ELECTRIC HEAT APPLICATION DATA . . . . . . . . . . 20
BURNER AIR SHUTTER ADJUSTMENT . . . . . . . . . 52
4
GAS HEAT APPLICATION DATA . . . . . . . . . . . . . . . 21
5
PIPE SIZING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6
DH 180, 210, 240 FOUR AND SIX POINT LOAD
WEIGHT DISTRIBUTION . . . . . . . . . . . . . . . . . . . . . . 27
7
PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8
OPERATING WEIGHTS (LBS.) . . . . . . . . . . . . . . . . . 28
9
DH ELECTRICAL DATA WITHOUT POWERED
CONVENIENCE OUTLET . . . . . . . . . . . . . . . . . . . . . 29
CHECKING GAS INPUT . . . . . . . . . . . . . . . . . . . . . . 52
NATURAL GAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
ADJUSTMENT OF TEMPERATURE RISE . . . . . . . . 53
BELT DRIVE BLOWER . . . . . . . . . . . . . . . . . . . . . . . 53
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
COOLING TROUBLESHOOTING GUIDE . . . . . . . . . 53
GAS HEAT TROUBLESHOOTING GUIDE . . . . . . . . 57
UNIT FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . 60
LIST OF FIGURES
Fig. #
TYPICAL RIGGING . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2
3
4
5
6
CENTER OF GRAVITY. . . . . . . . . . . . . . . . . . . . . . 16
FIXED OUTDOOR AIR DAMPER . . . . . . . . . . . . . . 18
RECOMMENDED DRAIN PIPING . . . . . . . . . . . . . 18
TYPICAL FIELD WIRING . . . . . . . . . . . . . . . . . . . . 19
EXTERNAL SUPPLY CONNECTION EXTERNAL
SHUT-OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
BOTTOM SUPPLY CONNECTION EXTERNAL
SHUT-OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
VENT AND COMBUSTION AIR HOOD . . . . . . . . . 23
ENTHALPY SETPOINT ADJUSTMENT . . . . . . . . . 25
HONEYWELL ECONOMIZER CONTROL W7212 . 26
FOUR AND SIX POINT LOADS . . . . . . . . . . . . . . . 26
CENTER OF GRAVITY. . . . . . . . . . . . . . . . . . . . . . 27
UNIT DIMENSIONS & CLEARANCES . . . . . . . . . . 31
8
9
10
11
12
13
10 DH ELECTRICAL DATA WITH POWERED
CONVENIENCE OUTLET . . . . . . . . . . . . . . . . . . . . . 30
11 MINIMUM CLEARANCES . . . . . . . . . . . . . . . . . . . . . 31
Pg. #
1
7
Pg. #
14 ALTITUDE/TEMPERATURE CONVERSION
FACTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
15 BELT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . 42
16 PRESSURE DROP ACROSS A DRY
INDOOR COIL VS SUPPLY AIR CFM FOR
ALL UNIT TONNAGES . . . . . . . . . . . . . . . . . . . . . . 43
17 GAS VALVE PIPING . . . . . . . . . . . . . . . . . . . . . . . . 48
18 GAS VALVE AND CONTROLS. . . . . . . . . . . . . . . . 50
19 TYPICAL GAS VALVES . . . . . . . . . . . . . . . . . . . . . 51
20 PROPER FLAME ADJUSTMENT . . . . . . . . . . . . . . 52
21 TYPICAL FLAME APPEARANCE. . . . . . . . . . . . . . 52
12 UTILITIES ENTRY . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
13 ALTITUDE CORRECTION FACTORS . . . . . . . . . . . . 33
14 SUPPLY AIR BLOWER PERFORMANCE
(15 TON) - COOLING ONLY 180 MBH BOTTOM DUCT CONNECTIONS . . . . . . . . . . . . . . . 35
15 SUPPLY AIR BLOWER PERFORMANCE
(17.5 TON) - COOLING ONLY 210 MBH BOTTOM DUCT CONNECTIONS . . . . . . . . . . . . . . . 36
16 SUPPLY AIR BLOWER PERFORMANCE
(20 TON) - COOLING ONLY 240 MBH BOTTOM DUCT CONNECTIONS . . . . . . . . . . . . . . . 37
17 SUPPLY AIR BLOWER PERFORMANCE
(15 TON) - GAS HEAT 180 MBH BOTTOM DUCT CONNECTIONS . . . . . . . . . . . . . . . 38
18 SUPPLY AIR BLOWER PERFORMANCE
(17.5 TON) - GAS HEAT 210 MBH - BOTTOM
DUCT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . 39
19 SUPPLY AIR BLOWER PERFORMANCE
(20 TON) - GAS HEAT 240 MBH BOTTOM DUCT CONNECTIONS . . . . . . . . . . . . . . . 40
20 STATIC RESISTANCES. . . . . . . . . . . . . . . . . . . . . . . 41
21 POWER EXHAUST PERFORMANCE . . . . . . . . . . . . 41
22 BLOWER MOTOR AND DRIVE DATA. . . . . . . . . . . . 41
23 LIMIT CONTROL SETTING . . . . . . . . . . . . . . . . . . . . 47
24 ELECTRIC HEAT ANTICIPATOR SETPOINTS . . . . . 48
25 LIMIT CONTROL SETTING . . . . . . . . . . . . . . . . . . . . 50
26 GAS HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . 50
27 GAS RATE - CUBIC FEET PER HOUR . . . . . . . . . . . 53
28 UNIT CONTROL BOARD FLASH CODES. . . . . . . . . 60
Unitary Products Group
3
129963-YIM-A-0605
GENERAL
YORK ® Model DH units are either single package air
conditioners equipped with optional factory installed
electric heaters, or single package gas-fired central
heating furnaces with cooling unit. Both are designed
for outdoor installation on a rooftop or slab.
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury, death, or property damage.
The units are completely assembled on rigid, permanently attached base rails. All piping, refrigerant
charge, and electrical wiring is factory installed and
tested. The units require electric power, gas connection, duct connections, installation of combustion air
inlet hood, flue gas outlet hoods and fixed outdoor air
intake damper (units without economizer or motorized
damper option only) at the point of installation.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or
any other appliance.
- WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach the gas supplier, call
the fire department.
- Installation and service must be performed by
a qualified installer, service agency or the
gas supplier.
The supplemental electric heaters have nickel-chrome
elements and utilize single point power connection.
These gas-fired heaters have aluminized-steel or
optional stainless steel, tubular heat exchangers with
spark ignition with proven pilot. All gas heaters are
shipped from the factory equipped for natural gas use,
but can be field converted to L.P./ Propane with Kit
Model # 1NP0418. See Gas Heat Application Data
Table.
INSPECTION
SAFETY CONSIDERATIONS
Due to system pressure, moving parts and electrical
components, installation and servicing of air conditioning equipment can be hazardous. Only qualified,
trained, service personnel should install, repair, maintain or service this equipment.
Observe all precautions in the literature, on labels and
tags accompanying the equipment whenever working
on air conditioning equipment. Be sure to follow all
other safety precautions that apply.
Wear safety glasses and work gloves, and follow all
safety codes. Use a quenching cloth and have a fire
extinguisher available for all brazing operations.
4
As soon as a unit is received, it should be inspected for
possible damage during transit. If damage is evident,
the extent of the damage should be noted on the carrier's freight bill. A separate request for inspection by
the carrier's agent should be made in writing. Refer to
Form 50.15-NM for additional information.
REFERENCE
Additional information on the design, installation, operation and service of this equipment is available in the
following reference forms:
•
035-19856-000 - Barometric Relief Damper
Accessory
Unitary Products Group
129963-YIM-A-0605
•
035-19854-000 - Economizer Damper
Accessory
•
035-08032-002 - Propane Conversion Accessory
(USA)
•
035-13073-001 - High Altitude Accessory (Nat.
Gas)
•
035-08524-002 - High Altitude Accessory (Propane)
RENEWAL PARTS
THIS PRODUCT MUST BE INSTALLED IN
STRICT
COMPLIANCE
WITH
THE
ENCLOSED
INSTALLATION
INSTRUCTIONS AND ANY APPLICABLE LOCAL,
STATE, AND NATIONAL CODES INCLUDING, BUT NOT LIMITED TO, BUILDING,
ELECTRICAL, AND MECHANICAL CODES.
Refer to York ® USER'S MAINTENANCE and SERVICE INFORMATION MANUAL Part Number 03519699-001.
APPROVALS
Design certified by CSA as follows:
•
For use as a cooling unit only with or without
optional electric heat.
•
For use as a forced air furnace with cooling unit
•
For outdoor installation only.
•
For installation on combustible material.
•
For use with natural gas or propane gas.
Unitary Products Group
IMPROPER INSTALLATION MAY CREATE A
CONDITION WHERE THE OPERATION OF
THE PRODUCT COULD CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
The installer should pay particular attention to the
words: NOTE, CAUTION and WARNING. Notes are
intended to clarify or make the installation easier. Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury and/
or equipment damage may result if installation procedure is not handled properly.
5
129963-YIM-A-0605
PRODUCT NOMENCLATURE
15-20T Sunline Ultra™ Model Number Nomenclature
York Brand
D H 240 N 24 A 2 A AA 1 A
Product Category
D = Air Cond., Single Package
Product Style
A = Style A
Product Generation
1 = First Generation
6HFRQG*HQHUDWLRQ
Product Identifier
H= R-22 High Efficiency
Voltage
Nominal Cooling
Capacity - MBH
180 = 15 Ton
.57RQ
240 = 20 Ton
Heat Type & Nominal Heat Capacity
C00 = Cooling Only. No field installed electric heat
Gas Heat Options
N24 = 240 MBH Output Aluminized Steel
N32 = 320 MBH Output Aluminized Steel, (15-25T Only)
S24 = 240 MBH Output Stainless Steel
S32 = 320 MBH Output Stainless Steel, (15-25T Only)
Electric Heat Options
E18 = 18 KW
E36 = 36 KW
E54 = 54 KW
E72 = 72 KW
2 = 208/230-3-60
4 = 460-3-60
5 = 575-3-60
Installation Options
A = No Options Installed
B = Option 1
C = Option 2
D = Options 1 & 2
E = Option 3
F = Options 4
G = Options 1 & 3
H = Options 1 & 4
J = Options 1, 2 & 3
K = Options 1, 2, & 4
L = Options 1,3 & 4
M = Options 1, 2, 3, & 4
N = Options 2 & 3
P = Options 2 & 4
Q = Options 2, 3, & 4
R = Options 3 & 4
S = Option 5
T = Options 1 & 5
U = Options 1, 3, & 5
V = Options 1, 4, & 5
W = Options 1, 3, 4, & 5
X = Options 3 & 5
Y = Options 4 & 5
Z = Options 3, 4, & 5
Options
1 = Disconnect
2 = Non-Pwr'd Conv Oultet
3 = Smoke Detector S.A.
4 = Smoke Detector R.A.
5 = Pwr'd Conv. Outlet
Additional Options
(See Next Page)
Airflow
A= Std Motor/Drive
B = Std Mtr/Drive/Single Input Econo
C = Std Mtr/Drive/Single Input Econo/Power Exhaust*
D = Std Mtr/Drive/Motorized Damper
F = Std Mtr/Drive/4" Filters
G = Std Mtr/Drive/4" Filters/Single Input Econ
H = Std Mtr/Drive/4" Filters/Single Input Econ/Power Exhaust*
L = Std Mtr/Drive/BAS Ready Econ (No BAS Controller) w/2" Pleated Filters
M = Std Mtr/Drive/BAS Ready Econ (No BAS Controller)/Power Exhaust w/2" Pleated Filters*
N = Hi Static Drive
P = Hi Static Drive/Single Input Econo
Q = Hi Static Drive/Single Input Econo/Power Exhaust*
R = Hi Static Drive/Motorized Damper
T = Hi Static Drive/4" Filters
U = Hi Static Drive/4" Filters/Single Input Econ
V = Hi Static Drive/4" Filters/Single Input Econ/Power Exhaust*
Y = Hi Static Drive/BAS Ready Econ (No BAS Controller) w/2" Pleated Filters
Z = Hi Static Drive/BAS Ready Econ (No BAS Controller)/Power Exhaust w/2" Pleated Filters*
6
Unitary Products Group
129963-YIM-A-0605
PRODUCT NOMENCLATURE - CONTINUED
Standard Cabinet
AA
AB
AC
AD
AE
AF
AG
AH
AJ
AK
AL
AM
AN
CA
CB
CC
CD
CE
CF
CG
CH
CJ
CK
CL
CM
CN
CP
CQ
CR
CS
CT
CU
CV
CW
CX
JA
JB
JC
JD
JE
JF
JG
JH
JJ
JK
JL
JM
JN
JP
JQ
JR
JS
None
Phase Monitor
Coil Guard
Dirty Filter Switch
Phase Monitor & Coil Guard
Phase Monitor & Dirty Filter Switch
Coil Guard & Dirty Filter Switch
Phase Monitor, Coil Guard, & Dirty Filter Switch
SS Drain Pan
SS Drain Pan & Phase Monitor
SS Drain Pan & Coil Guard
SS Drain Pan & Dirty Filter Switch
SS Drain Pan, Phase Monitor, Coil Guard & Dirty Filter Switch
CPC Controller with Dirty Filter Switch & Air Proving Switch
CPC Controller, DFS, APS & Phase Monitor
CPC Controller, DFS, APS & Coil Guard
CPC Controller, DFS, APS, Phase Monitor, & Coil Guard
CPC Controller, DFS, APS & Technicoat Cond. Coil
CPC Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
CPC Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
CPC Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
CPC Controller, DFS, APS & Technicoat Evap. Coil
CPC Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
CPC Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
CPC Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
CPC Controller, DFS, APS & Technicoat Evap. & Cond Coils
CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
CPC Controller, DFS, APS, SS Drain Pan
CPC Controller, DFS, APS, SS Drain Pan, Phase Monitor, & Coil Guard
CPC Controller, DFS, APS, SS Drain Pan, & Technicoat Cond Coils
CPC Controller, DFS, APS, SS Drain Pan, & Technicoat Evap Coil
CPC Controller, DFS, APS, SS Drain Pan, & Technicoat Evap and Cond Coils
CPC Controller, DFS, APS, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils
Johnson UNT Controller with Dirty Filter Switch & Air Proving Switch
Johnson UNT Controller, DFS, APS & Phase Monitor
Johnson UNT Controller, DFS, APS & Coil Guard
Johnson UNT Controller, DFS, APS, Phase Monitor, & Coil Guard
Johnson UNT Controller, DFS, APS & Technicoat Cond. Coil
Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
Johnson UNT Controller, DFS, APS & Technicoat Evap. Coil
Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
Johnson UNT Controller, DFS, APS & Technicoat Evap. & Cond Coils
Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
Johnson UNT Controller, DFS, APS, SS Drain Pan
Unitary Products Group
7
129963-YIM-A-0605
Standard Cabinet
JT
JU
JV
JW
JX
HA
HB
HC
HD
HE
HF
HG
HH
HJ
HK
HL
HM
HN
HP
HQ
HR
HS
HT
HU
HV
HW
HX
NA
NB
NC
ND
NE
NF
NG
NH
NJ
NK
NL
NM
NN
NP
NQ
NR
NS
NT
NU
NV
NW
NX
TA
TB
TC
TD
TE
8
Johnson UNT Controller, DFS, APS, SS Drain Pan, Phase Monitor, & Coil Guard
Johnson UNT Controller, DFS, APS, SS Drain Pan, & Technicoat Cond Coils
Johnson UNT Controller, DFS, APS, SS Drain Pan, & Technicoat Evap Coil
Johnson UNT Controller, DFS, APS, SS Drain Pan, & Technicoat Evap and Cond Coils
Johnson UNT Controller, DFS, APS, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils
Honeywell Excel 10 Controller with Dirty Filter Switch & Air Proving Switch
Honeywell Excel 10 Controller, DFS, APS & Phase Monitor
Honeywell Excel 10 Controller, DFS, APS & Coil Guard
Honeywell Excel 10 Controller, DFS, APS, Phase Monitor, & Coil Guard
Honeywell Excel 10 Controller, DFS, APS & Technicoat Cond. Coil
Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. Coil
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. & Cond Coils
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, Phase Monitor, & Coil Guard
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, & Technicoat Cond Coils
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, & Technicoat Evap Coil
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, & Technicoat Evap and Cond Coils
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils
Novar ETC-3 Controller with Dirty Filter Switch & Air Proving Switch
Novar ETC-3 Controller, DFS, APS & Phase Monitor
Novar ETC-3 Controller, DFS, APS & Coil Guard
Novar ETC-3 Controller, DFS, APS, Phase Monitor, & Coil Guard
Novar ETC-3 Controller, DFS, APS & Technicoat Cond. Coil
Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor
Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard
Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
Novar ETC-3 Controller, DFS, APS & Technicoat Evap. Coil
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
Novar ETC-3 Controller, DFS, APS & Technicoat Evap. & Cond Coils
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
Novar ETC-3 Controller, DFS, APS, SS Drain Pan
Novar ETC-3 Controller, DFS, APS, SS Drain Pan, Phase Monitor, & Coil Guard
Novar ETC-3 Controller, DFS, APS, SS Drain Pan, & Technicoat Cond Coils
Novar ETC-3 Controller, DFS, APS, SS Drain Pan, & Technicoat Evap Coil
Novar ETC-3, DFS, APS, SS Drain Pan, & Technicoat Evap and Cond Coils
Novar ETC-3 Controller, DFS, APS, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils
Technicoat Condenser Coil
Technicoat Condenser Coil & Phase Monitor
Technicoat Condenser Coil & Coil Guard
Technicoat Condenser Coil & Dirty Filter Switch
Technicoat Condenser Coil, Phase Monitor, & Coil Guard
Unitary Products Group
129963-YIM-A-0605
Standard Cabinet
TF
TG
TH
TJ
TK
TL
TM
TN
TP
TQ
TR
TS
TT
TU
TV
TW
TX
TY
TZ
T1
T4
T7
LA
LB
LC
LD
LE
LF
LG
LH
LJ
LK
LL
LM
LN
LP
LQ
LR
LS
LT
LU
LV
LW
LX
WA
WB
WC
WD
WE
WF
WG
WH
WJ
WK
Technicoat Condenser Coil, Phase Monitor, & Dirty Filter Switch
Technicoat Condenser Coil, Coil Guard, & Dirty Filter Switch
Technicoat Condenser Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch
Technicoat Evaporator Coil
Technicoat Evaporator Coil & Phase Monitor
Technicoat Evaporator Coil & Coil Guard
Technicoat Evaporator Coil & Dirty Filter Switch
Technicoat Evaporator Coil, Phase Monitor, & Coil Guard
Technicoat Evaporator Coil, Phase Monitor, & Dirty Filter Switch
Technicoat Evaporator Coil, Coil Guard, & Dirty Filter Switch
Technicoat Evaporator Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch
Technicoat Evaporator & Condenser Coils
Technicoat Evaporator & Condenser Coils & Phase Monitor
Technicoat Evaporator & Condenser Coils & Coil Guard
Technicoat Evaporator & Condenser Coils & Dirty Filter Switch
Technicoat Evaporator & Condenser Coils, Phase Monitor, & Coil Guard
Technicoat Evaporator & Condenser Coils, Phase Monitor, & Dirty Filter Switch
Technicoat Evaporator & Condenser Coils, Coil Guard, & Dirty Filter Switch
Technicoat Evaporator & Condenser Coils, Phase Monitor, Coil Guard, & Dirty Filter Switch
Technicoat Condenser & SS Drain Pan
Technicoat Evaporator & SS Drain Pan
Technicoat Evaporator & Condenser Coils & SS Drain Pan
Simplicity Intelli-Comfort Controller
Simplicity Intelli-Comfort Controller, & Phase Monitor
Simplicity Intelli-Comfort Controller, & Coil Guard
Simplicity Intelli-Comfort Controller, Phase Monitor, & Coil Guard
Simplicity Intelli-Comfort Controller, & Technicoat Cond. Coil
Simplicity Intelli-Comfort Controller, Technicoat Cond. Coil, & Phase Monitor
Simplicity Intelli-Comfort Controller, Technicoat Cond. Coil, & Coil Guard
Simplicity Intelli-Comfort Controller, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
Simplicity Intelli-Comfort Controller, & Technicoat Evap. Coil
Simplicity Intelli-Comfort Controller, Technicoat Evap. Coil, & Phase Monitor
Simplicity Intelli-Comfort Controller, Technicoat Evap. Coil, & Coil Guard
Simplicity Intelli-Comfort Controller, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
Simplicity Intelli-Comfort Controller, & Technicoat Evap. & Cond Coils
Simplicity Intelli-Comfort Controller, Technicoat Evap. & Cond Coils, & Phase Monitor
Simplicity Intelli-Comfort Controller, Technicoat Evap. & Cond Coils, & Coil Guard
Simplicity Intelli-Comfort Controller, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
Simplicity Intelli-Comfort Controller, SS Drain Pan
Simplicity Intelli-Comfort Controller, SS Drain Pan, Phase Monitor, & Coil Guard
Simplicity Intelli-Comfort Controller, SS Drain Pan, & Technicoat Cond Coils
Simplicity Intelli-Comfort Controller, SS Drain Pan, & Technicoat Evap Coil
Simplicity Intelli-Comfort Controller, SS Drain Pan, & Technicoat Evap and Cond Coils
Simplicity Intelli-Comfort Controller, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils
Intelli-Comfort w/ModLINC Controller
Intelli-Comfort w/ModLINC Controller, & Phase Monitor
Intelli-Comfort w/ModLINC Controller, & Coil Guard
Intelli-Comfort w/ModLINC Controller, Phase Monitor, & Coil Guard
Intelli-Comfort w/ModLINC Controller, & Technicoat Cond. Coil
Intelli-Comfort w/ModLINC Controller, Technicoat Cond. Coil, & Phase Monitor
Intelli-Comfort w/ModLINC Controller, Technicoat Cond. Coil, & Coil Guard
Intelli-Comfort w/ModLINC Controller, Technicoat Cond. Coil, Phase Monitor, & Coil Guard
Intelli-Comfort w/ModLINC Controller, & Technicoat Evap. Coil
Intelli-Comfort w/ModLINC Controller, Technicoat Evap. Coil, & Phase Monitor
Unitary Products Group
9
129963-YIM-A-0605
Standard Cabinet
WL
WM
WN
WP
WQ
WR
WS
WT
WU
WV
WW
WX
Intelli-Comfort w/ModLINC Controller, Technicoat Evap. Coil, & Coil Guard
Intelli-Comfort w/ModLINC Controller, Technicoat Evap. Coil, Phase Monitor, & Coil Guard
Intelli-Comfort w/ModLINC Controller, & Technicoat Evap. & Cond Coils
Intelli-Comfort w/ModLINC Controller, Technicoat Evap. & Cond Coils, & Phase Monitor
Intelli-Comfort w/ModLINC Controller, Technicoat Evap. & Cond Coils, & Coil Guard
Intelli-Comfort w/ModLINC Controller, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard
Intelli-Comfort w/ModLINC Controller, SS Drain Pan
Intelli-Comfort w/ModLINC Controller, SS Drain Pan, Phase Monitor, & Coil Guard
Intelli-Comfort w/ModLINC Controller, SS Drain Pan, & Technicoat Cond Coils
Intelli-Comfort w/ModLINC Controller, SS Drain Pan, & Technicoat Evap Coil
Intelli-Comfort w/ModLINC Controller, SS Drain Pan, & Technicoat Evap and Cond Coils
Intelli-Comfort w/ModLINC Controller, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils
BA
BB
BC
BD
BE
BF
BG
BH
BJ
BK
BL
BM
BN
DA
DB
DC
DD
DE
DF
DG
DH
DJ
DK
DL
DM
DN
DP
DQ
DR
DS
DT
DU
DV
DW
DX
Hinged Filter Door & Toolless Access Panels
Phase Monitor, Hinged Filter Door & Toolless Access Panels
Coil Guard, Hinged Filter Door & Toolless Access Panels
Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Phase Monitor & Coil Guard, Hinged Filter Door & Toolless Access Panels
Phase Monitor & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Coil Guard & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Phase Monitor, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
SS Drain Pan & Hinged Filter Door & Toolless Access Panels
SS Drain Pan & Phase Monitor, Hinged Filter Door & Toolless Access Panels
SS Drain Pan & Coil Guard, Hinged Filter Door & Toolless Access Panels
SS Drain Pan & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
SS Drain Pan & Phase Monitor & Coil Guard, Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
CPC Controller with Dirty Filter Switch & Air Proving Switch, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS & Phase Monitor, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS & Coil Guard, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS & Technicoat Cond. Coil, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS & Technicoat Evap. Coil, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS & Technicoat Evap. & Cond Coils, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, SS Drain Pan Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, SS Drain Pan, Phase Monitor, & Coil Guard Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, SS Drain Pan, & Technicoat Cond Coils Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, SS Drain Pan, & Technicoat Evap Coil Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, SS Drain Pan, & Technicoat Evap and Cond Coils Hinged Filter Door & Toolless Access Panels
CPC Controller, DFS, APS, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils Hinged Filter Door & Toolless
Access Panels
Johnson UNT Controller with Dirty Filter Switch & Air Proving Switch, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS & Coil Guard, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Hinged Filter Door & Toolless Access Cabinet
EA
EB
EC
ED
10
Unitary Products Group
129963-YIM-A-0605
Hinged Filter Door & Toolless Access Cabinet
EE
EF
EG
EH
EJ
EK
EL
EM
EN
EP
EQ
ER
ES
ET
EU
EV
EW
EX
GA
GB
GC
GD
GE
GF
GG
GH
GJ
GK
GL
GM
GN
GP
GQ
GR
GS
GT
GU
GV
GW
GX
PA
PB
PC
PD
PE
PF
PG
PH
PJ
Johnson UNT Controller, DFS, APS & Technicoat Cond. Coil, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS & Technicoat Evap. Coil, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS & Technicoat Evap. & Cond Coils, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access
Panels
Johnson UNT Controller, DFS, APS, SS Drain Pan Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, SS Drain Pan, Phase Monitor, & Coil Guard Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, SS Drain Pan, & Technicoat Cond Coils Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, SS Drain Pan, & Technicoat Evap Coil Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, SS Drain Pan, & Technicoat Evap and Cond Coils Hinged Filter Door & Toolless Access Panels
Johnson UNT Controller, DFS, APS, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils Hinged Filter Door &
Toolless Access Panels
Honeywell Excel 10 Controller with Dirty Filter Switch & Air Proving Switch, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS & Coil Guard, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS & Technicoat Cond. Coil, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access
Panels
Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. Coil, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access
Panels
Honeywell Excel 10 Controller, DFS, APS & Technicoat Evap. & Cond Coils, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Toolless Access
Panels
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Honeywell Excel 10 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless
Access Panels
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, Phase Monitor, & Coil Guard
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, & Technicoat Cond Coils
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, & Technicoat Evap Coil
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, & Technicoat Evap and Cond Coils
Honeywell Excel 10 Controller, DFS, APS, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils
Novar ETC-3 Controller with Dirty Filter Switch & Air Proving Switch, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS & Coil Guard, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS & Technicoat Cond. Coil, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS & Technicoat Evap. Coil, Hinged Filter Door & Toolless Access Panels
Unitary Products Group
11
129963-YIM-A-0605
Hinged Filter Door & Toolless Access Cabinet
PK
PL
PM
PN
PP
PQ
PR
PS
PT
PU
PV
PW
PX
UA
UB
UC
UD
UE
UF
UG
UH
UJ
UK
UL
UM
UN
UP
UQ
UR
US
UT
UU
UV
UW
UX
UY
UZ
U1
U4
U7
QA
QB
QC
QD
QE
QF
QG
QH
QJ
QK
QL
QM
QN
12
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS & Technicoat Evap. & Cond Coils, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Novar ETC-3 Controller, DFS, APS, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access
Panels
Novar ETC-3 Controller, DFS, APS, SS Drain Pan
Novar ETC-3 Controller, DFS, APS, SS Drain Pan, Phase Monitor, & Coil Guard
Novar ETC-3 Controller, DFS, APS, SS Drain Pan, & Technicoat Cond Coils
Novar ETC-3 Controller, DFS, APS, SS Drain Pan, & Technicoat Evap Coil
Novar ETC-3, DFS, APS, SS Drain Pan, & Technicoat Evap and Cond Coils
Novar ETC-3 Controller, DFS, APS, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils
Technicoat Condenser Coil, Hinged Filter Door & Toolless Access Panels
Technicoat Condenser Coil & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Technicoat Condenser Coil & Coil Guard, Hinged Filter Door & Toolless Access Panels
Technicoat Condenser Coil & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Condenser Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Technicoat Condenser Coil, Phase Monitor, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Condenser Coil, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Condenser Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator Coil, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator Coil & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator Coil & Coil Guard, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator Coil & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator Coil, Phase Monitor, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator Coil, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator Coil, Phase Monitor, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator & Condenser Coils, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator & Condenser Coils & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator & Condenser Coils & Coil Guard, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator & Condenser Coils & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator & Condenser Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator & Condenser Coils, Phase Monitor, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator & Condenser Coils, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator & Condenser Coils, Phase Monitor, Coil Guard, & Dirty Filter Switch, Hinged Filter Door & Toolless Access Panels
Technicoat Condenser & SS Drain Pan, Hinged Filter Door & Toolless Access Panels
Technicoat Evaporator & SS Drain Pan, Hinged Filter Door and Toolless Access Panels
Technicoat Evaporator & Condenser Coils & SS Drain Pan, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller with Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, & Technicoat Cond. Coil, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access
Simplicity Intelli-Comfort Controller, & Technicoat Evap. Coil, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access
Simplicity Intelli-Comfort Controller, & Technicoat Evap. & Cond Coils, Hinged Filter Door & Toolless Access Panels
Unitary Products Group
129963-YIM-A-0605
Hinged Filter Door & Toolless Access Cabinet
QP
QQ
QR
QS
QT
QU
QV
QW
QX
Simplicity Intelli-Comfort Controller, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Toolless Access Pan
Simplicity Intelli-Comfort Controller, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless
Simplicity Intelli-Comfort Controller, SS Drain Pan Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, SS Drain Pan, Phase Monitor, & Coil Guard Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, SS Drain Pan, & Technicoat Cond Coils Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, SS Drain Pan, & Technicoat Evap Coil Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, SS Drain Pan, & Technicoat Evap and Cond Coils Hinged Filter Door & Toolless Access Panels
Simplicity Intelli-Comfort Controller, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils Hinged Filter Door &
Toolless Access Panels
XA Intelli-Comfort w/ModLINC Controller, Hinged Filter Door & Toolless Access Panels
XB Intelli-Comfort w/ModLINC Controller, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
XC Intelli-Comfort w/ModLINC Controller, & Coil Guard, Hinged Filter Door & Toolless Access Panels
XD Intelli-Comfort w/ModLINC Controller, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access Panels
XE Intelli-Comfort w/ModLINC Controller, & Technicoat Cond. Coil, Hinged Filter Door & Toolless Access Panels
XF Intelli-Comfort w/ModLINC Controller, Technicoat Cond. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
XG Intelli-Comfort w/ModLINC Controller, Technicoat Cond. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
XH Intelli-Comfort w/ModLINC Controller, Technicoat Cond. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access
XJ Intelli-Comfort w/ModLINC Controller, & Technicoat Evap. Coil, Hinged Filter Door & Toolless Access Panels
XK Intelli-Comfort w/ModLINC Controller, Technicoat Evap. Coil, & Phase Monitor, Hinged Filter Door & Toolless Access Panels
XL Intelli-Comfort w/ModLINC Controller, Technicoat Evap. Coil, & Coil Guard, Hinged Filter Door & Toolless Access Panels
XM Intelli-Comfort w/ModLINC Controller, Technicoat Evap. Coil, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless Access
XN Intelli-Comfort w/ModLINC Controller, & Technicoat Evap. & Cond Coils, Hinged Filter Door & Toolless Access Panels
XP Intelli-Comfort w/ModLINC Controller, Technicoat Evap. & Cond Coils, & Phase Monitor, Hinged Filter Door & Toolless Access Pan
XQ Intelli-Comfort w/ModLINC Controller, Technicoat Evap. & Cond Coils, & Coil Guard, Hinged Filter Door & Toolless Access Panels
XR Intelli-Comfort w/ModLINC Controller, Technicoat Evap. & Cond Coils, Phase Monitor, & Coil Guard, Hinged Filter Door & Toolless
XS Intelli-Comfort w/ModLINC Controller, SS Drain Pan Hinged Filter Door & Toolless Access Panels
XT Intelli-Comfort w/ModLINC Controller, SS Drain Pan, Phase Monitor, & Coil Guard Hinged Filter Door & Toolless Access Panels
XU Intelli-Comfort w/ModLINC Controller, SS Drain Pan, & Technicoat Cond Coils Hinged Filter Door & Toolless Access Panels
XV Intelli-Comfort w/ModLINC Controller, SS Drain Pan, & Technicoat Evap Coil Hinged Filter Door & Toolless Access Panels
XW Intelli-Comfort w/ModLINC Controller, SS Drain Pan, & Technicoat Evap and Cond Coils Hinged Filter Door & Toolless Access Panels
XX Intelli-Comfort w/ModLINC Controller, SS Drain Pan, Phase Monitor, Coil Guard, & Technicoat Evap and Cond Coils Hinged Filter Door &
Toolless Access Panels
Unitary Products Group
13
129963-YIM-A-0605
INSTALLATION
LIMITATIONS
INSTALLATION SAFETY INFORMATION:
These units must be installed in accordance with the
following national and local safety codes:
Read these instructions before continuing this appliance installation. This is an outdoor combination heating and cooling unit. The installer must assure that
these instructions are made available to the consumer
and with instructions to retain them for future reference.
In U.S.A.:
•
National Electrical Code ANSI/NFPA No. 70.
•
National Fuel Gas Code Z223.1.
1. Refer to the furnace rating plate for the approved
type of gas for this furnace.
•
2. Install this furnace only in a location and position
as specified on Page 15 of these instructions.
Gas-Fired Central Furnace Standard ANSI
Z21.47a.
•
Local gas utility requirements.
3. Never test for gas leaks with an open flame. Use
commercially available soap solution made specifically for the detection of leaks when checking all
connections, as specified on Pages 8, 16, 17 and
40 of these instructions.
4. Always install furnace to operate within the furnace's intended temperature-rise range with the
duct system and within the allowable external static
pressure range, as specified on the unit name/rating plate, specified on Page 53 of these instructions.
5. This equipment is not to be used for temporary
heating of buildings or structures under construction.
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARNING EXACTLY COULD RESULT IN SERIOUS
INJURY, DEATH OR PROPERTY DAMAGE.
NEVER TEST FOR GAS LEAKS WITH AN
OPEN FLAME. USE A COMMERICALLY
AVAILABLE SOAP SOLUTION MADE SPECIFICALLY FOR THE DETECTION OF
LEAKS TO CHECK ALL CONNECTIONS. A
FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
14
In Canada:
•
Current Canadian Electrical Code C22.1.
•
Current Gas Installation Codes CSA-B149.1.
•
Local plumbing and waste water codes.
•
Other applicable local codes.
Refer to the Unit Application Data table and to the Gas
Heat Application Data table.
After installation, the unit must be adjusted to obtain a
temperature rise within the range specified on the unit
rating plate.
If components are to be added to a unit to meet local
codes, they are to be installed at the dealer's and/or
the customer's expense.
Size of unit for proposed installation should be based
on heat loss/heat gain calculation made according to
the methods of the Air Conditioning Contractors of
America (ACCA).
This furnace is not to be used for temporary heating of
buildings or structures under construction.
Unitary Products Group
129963-YIM-A-0605
TABLE 1: UNIT APPLICATION DATA
UNIT MODEL NUMBER
Voltage Variation,
Min. / Max.1
DH180
208/230-3-60
187 / 253
460-3-60
414 / 506
575-3-60
Supply Air CFM, Min. / Max.
1.
DH210
DH240
518 / 630
4,500 / 7,200
6,000 / 9,000
Wet Bulb Temperature (ºF) of Air on
Evaporator Coil, Min. / Max.
57 / 72
Dry Bulb Temperature (ºF) of Air on
Condenser Coil, Min. / Max.
0 / 120
6,000 / 9,400
Utilization range “A” in accordance with ARI Standard 110.
LOCATION
Use the following guidelines to select a suitable location for these units.
1. Unit is designed for outdoor installation only.
2. Condenser coils must have an unlimited supply of
air.
3. Where a choice of location is possible, position the
unit on either north or east side of building.
4. For ground level installation, use a level concrete
slab with a minimum thickness of 4 inches. The
length and width should be at least 6 inches
greater than the unit base rails. Do not tie slab to
the building foundation.
5. Roof structures must be able to support the weight
of the unit and its options and/or accessories. Unit
must be installed on a solid level roof curb or
appropriate angle iron frame.
6. Maintain level tolerance to 1/2 inch maximum
across the entire length or width of the unit.
Unitary Products Group
Excessive exposure of this furnace to contaminated combustion air may result in equipment
damage or personal injury. Typical contaminates include: permanent wave solutions, chlorinated waxes and cleaners, chlorine based
swimming pool chemicals, water softening
chemicals, carbon tetrachloride, Halogen type
refrigerants, cleaning solvents (e.g. perchloroethylene), printing inks, paint removers, varnishes, hydrochloric acid, cements and glues,
antistatic fabric softeners for clothes dryers,
masonry acid washing materials.
If a unit is to be installed on a roof curb or special frame
other than a York ® roof curb, gasketing must be
applied to all surfaces that come in contact with the unit
underside.
15
129963-YIM-A-0605
RIGGING AND HANDLING
Exercise care when moving the unit. Do not remove
any packaging until the unit is near the place of installation. Rig the unit by attaching chain or cable slings to
the round lifting holes provided in the base rails.
Spreaders, whose length exceeds the largest dimension across the unit, MUST BE USED. Refer to
Figure 1.
Units may also be moved or lifted with a forklift, from
the side only, providing that an accessory skid is used.
LENGTH OF FORKS MUST BE A MINIMUM OF 90".
7RQ
FIGURE 2 - CENTER OF GRAVITY
Refer to the Physical Data Table 7 for unit weights and
to the Figures 2 or 12 for approximate center of gravity.
Before lifting a unit, make sure that all panels
are in place and that its weight is distributed
equally on all cables so it will lift evenly.
An adhesive backed label is provided over the
outside of the combustion air inlet opening to
prevent moisture from entering the unit, which
could cause damage to electrical components.
Allow this closure label to remain in place until
the combustion air hood is to be installed (refer
to Vent and Combustion Hood Figure 8).
CLEARANCES
S P R E A D E R
B A R
L IF T IN G
H O L E S
C A U T IO N
B E F O R E
M A K E S U
W ID T H IS
E Q U A L L Y
S O T H A T
E V E N L Y
:
L IF T
R E
D IS
O N
IT W
IN G U N IT ,
T H A T IT S
T R IB U T E D
T H E C A B L E S
IL L L IF T
All units require certain clearances for proper operation
and service. Installer must make provisions for adequate combustion and ventilation air in accordance
with Section 5.3, Air for Combustion and Ventilation of
the National Fuel Gas Code, ANSI Z223.1 (in U.S.A.)
or Sections 7.2, 7.3 or 7.4 of Gas Installation Codes
CSA-B149.1 (in Canada) and/or applicable provisions
of the local building codes. Refer to Dimensions and
Clearances Figure 13 for the clearances required for
combustible construction, servicing, and proper unit
operation.
FIGURE 1 - TYPICAL RIGGING
16
Unitary Products Group
129963-YIM-A-0605
FIXED OUTDOOR AIR INTAKE DAMPER
Do not permit overhanging structures or shrubs
to obstruct outdoor air discharge outlet, combustion air inlet or vent outlets.
DUCTWORK
Ductwork should be designed and sized according to
the methods in Manual Q of the Air Conditioning Contractors of America (ACCA).
A closed return duct system shall be used. This shall
not preclude use of economizers or outdoor fresh air
intake. The supply and return air duct connections at
the unit should be made with flexible joints to minimize
noise.
The supply and return air duct systems should be
designed for the CFM and static requirements of the
job. They should NOT be sized to match the dimensions of the duct connections on the unit.
When fastening ductwork to side duct flanges
on unit, insert screws through duct flanges
only. DO NOT insert screws through casing.
Outdoor ductwork must be insulated and
waterproofed.
Refer to Dimensions and Clearances Figure 13 for
information concerning side and bottom supply and
return air duct openings.
This damper is shipped inside the return air compartment. It is completely assembled and ready for installation. A damper baffle inside of the hood is adjustable to
provide variable amounts of outdoor air intake on units
that are not provided with an economizer or a motorized damper option. Refer to the Fixed Outdoor
Damper Figure 3.
Gasketing and mounting screws are provided in a parts
bag attached to the hood assembly. Apply gasketing to
the three flange surfaces on the hood prior to installing
the hood. Extend gasketing 1/4 inch beyond the top
and bottom of the two side flanges to insure adequate
sealing.
Adjusting the damper to the desired air flow may be
done before mounting the hood into position or after
installation by removing the front hood panel or the
screen on the bottom of the hood. Damper baffle in
position 1 will allow approximately 10% outdoor air
flow, position 2 approximately 15% and, to allow
approximately 25%, remove the damper baffle.
On units with bottom return air application install the
damper assembly over the opening in the side return
air access panel. Remove and discard the opening
cover and the covering over the hood mounting holes
(used for shipping) before installing. Secure with the
screws provided.
On units with side return air applications, install the
damper assembly on the return air ductwork as close
to the unit as possible. Cut an opening 16 inches high
by 18 inches wide in the ductwork to accommodate the
damper. Using the holes in the hood flanges as a template, drill 9/64 inch dia. (#26 drill) holes into the ductwork and secure with the screws provided.
NOTE: It is recommended that, in Canada, the outlet
duct be provided with a removable access
panel. It is recommended that this opening be
accessible when the unit is installed in service,
and of a size such that smoke or reflected light
may be observed inside the casing to indicate
the presence of leaks in the heat exchanger.
The cover should be attached in a manner
adequate to prevent leakage.
Unitary Products Group
If outdoor air intake will not be required on
units with bottom return air applications, the
damper assembly should still be mounted on
the side return air access panel, per the
instructions above, to insure moisture is not
drawn into the unit during operation. The covering over the mounting holes only need be
removed. Do not remove the opening cover.
17
129963-YIM-A-0605
COMPRESSORS
Units are shipped with compressor mountings factoryadjusted and ready for operation.
Do not loosen compressor mounting bolts.
FILTERS
FIGURE 3 - FIXED OUTDOOR AIR DAMPER
CONDENSATE DRAIN
Plumbing must conform to local codes. Use a sealing
compound on male pipe threads. Install a condensate
drain line from the one-inch NPT female connection on
the unit to an open drain.
NOTE: The condensate drain operates in a negative
pressure in the cabinet. The condensate drain
line MUST be trapped to provide proper drainage. See Figure 4.
Two-inch or four-inch filters can be supplied with each
unit. Filters must always be installed ahead of the
evaporator coil and must be kept clean or replaced with
same size and type. Dirty filters will reduce the capacity
of the unit and will result in frosted coils or safety shutdown. Minimum filter area and required sizes are
shown in Physical Data Table 7.
SERVICE ACCESS
The following removable panels provide access to all
serviceable components:
•
•
•
•
•
•
•
•
Compressor compartment
Electric Heat compartment
Gas Heat compartment (Two panels)
Side Supply & Return Air compartments (Two panels)
Blower compartment (Three panels)
Main control box
Filter compartment
Outdoor Air compartment (Two panels)
Refer to the Dimensions and Clearances Figure 13 for
location of these access panels.
Make sure that all screws and panel latches
are replaced and properly positioned on the
unit to maintain an airtight seal.
FIGURE 4 - RECOMMENDED DRAIN PIPING
18
Unitary Products Group
129963-YIM-A-0605
T
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FIGURE 5 - TYPICAL FIELD WIRING
Unitary Products Group
19
129963-YIM-A-0605
with a separate branch circuit fed directly from the
meter panel and properly fused.
THERMOSTAT
The room thermostat should be located on an inside
wall approximately 56 inches above the floor where it
will not be subject to drafts, sun exposure or heat from
electrical fixtures or appliances. Follow manufacturer's
instructions enclosed with thermostat for general installation procedure. A minimum of seven color-coded
insulated wires (#18 AWG) should be used to connect
thermostat to unit.
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of
the National Electrical Code, ANSI / NFPA No. 70 (in
U.S.A.), current Canadian Electrical Code C22.1 (in
Canada) and/or local ordinances. The unit must be
electrically grounded in accordance with NEC and CEC
(as specified above) and/or local codes. Voltage tolerances, which must be maintained at the compressor
terminals, during starting and running conditions, are
indicated on the unit Rating Plate and the Unit Application Data table.
The internal wiring harness furnished with this unit is
an integral part of a CSA design certified unit. Field
alteration to comply with electrical codes should not be
required.
A fused disconnect switch should be field provided for
the unit. The switch must be separate from all other circuits. Wire entry at knockout openings require conduit
fittings to comply with NEC (in U.S.A.), CEC (in Canada) and/or local codes. Refer to the Dimensions and
Clearances Figure 13 for installation location. If any of
the wire supplied with the unit must be replaced,
replacement wire must be of the type shown on the wiring diagram and the same minimum gauge as the
replaced wire.
Electrical line must be sized properly to carry the load.
Use copper conductors only. Each unit must be wired
When connecting electrical power and control
wiring to the unit, waterproof type connectors
MUST BE USED so that water or moisture
cannot be drawn into the unit during normal
operation. The above waterproofing conditions
will also apply when installing a field-supplied
disconnect switch.
Refer to the Typical Field Wiring Figure 5 and to the
appropriate unit wiring diagram for control circuit and
power wiring information.
TABLE 2: CONTROL WIRE SIZES
Wire Size
18 AWG
1.
Maximum Length1
150 Feet
From the unit to the thermostat and back to the unit.
OPTIONAL ELECTRIC HEAT
The factory-installed heaters are wired for single point
power supply. Power supply need only be brought into
the single point terminal block and thermostat wiring to
the low voltage terminal strip located in the upper portion of the unit control box.
These CSA approved heaters are located within the
central compartment of the unit with the heater elements extending into the supply air chamber. Refer to
Figure 13 for access panel location.
Fuses are supplied, where required, by the factory.
Some KW sizes require fuses and others do not. Refer
to Table 3 for minimum CFM limitations and to Tables 9
and 10 for electrical data.
TABLE 3: ELECTRIC HEAT APPLICATION DATA
NOMINAL
HEATER SIZE
(KW)
MINIMUM CFM UNIT SIZE
15 TON
18
208/230,460,575
4500
36
208/230,460,575
4500
208/230
5000
460,575
4500
208/230
5000
460,575
4500
54
72
20
VOLTAGE
3-PHASE,
60 HZ
17.5 & 20 TON
6000
Unitary Products Group
129963-YIM-A-0605
OPTIONAL GAS HEAT
These gas-fired heaters have aluminized-steel or
optional stainless steel, tubular heat exchangers with
spark ignition with proven pilot.
All gas heaters are shipped from the factory equipped
for natural gas use, but can be field converted to L.P./
Propane with Kit Model # 1NP0418. See Gas Heat
Application Data Table.
TABLE 4: GAS HEAT APPLICATION DATA
2,000 To
4,500 Feet
Above
Sea Level
0 To
2,000 Feet
Above
Sea Level
Output Capacity (Mbh)
0 To
2,000 Feet
Above
Sea Level
2,000 To
4,500 Feet
Above
Sea Level
Available
on Models
Gas
Rate
(Ft./Hr.)
Temp.
Rise ºF
At
Full Input
Max.
Min.
Max.
Min.
Max.
Max.
Min.
Max.
300
150
270
135
240
213
15, 17.5 and 20 Ton
279
20
50
400
200
360
180
320
281
15, 17.5 and 20 Ton
372
30
60
GAS PIPING
GAS CONNECTION
Proper sizing of gas piping depends on the cubic feet
per hour of gas flow required, specific gravity of the gas
and the length of run. "National Fuel Gas Code" Z223.1
(in U.S.A.) or the current Gas Installation Codes CSAB149.1 (in Canada) should be followed in all cases
unless superseded by local codes or gas utility requirements. Refer to the Pipe Sizing Table 5.
The gas supply line can be routed through the knockouts located on the front of the unit or through the
opening provided in the unit's base. Refer to the
Dimensions and Clearances Figure 13 to locate these
access openings. Typical supply piping arrangements
are shown in the figures on Page 22. All shaded items
are field-supplied.
The heating value of the gas may differ with locality.
The value should be checked with the local gas utility.
If gas supply line is routed through the unit's base
ensure that the burner assembly can be removed for
maintenance without disturbing the supply line. The
supply piping and fittings must lie below the bottom gas
manifold to avoid interference with the burner assembly.
NOTE: There may be a local gas utility requirement
specifying a minimum diameter for gas piping.
All units require a one-inch pipe connection at
the entrance fitting.
TABLE 5: PIPE SIZING
Length in Feet
Nominal Iron Pipe Size
1 in.
1-1/4 in.
10
520
1,050
20
350
730
30
285
590
40
245
500
50
215
440
60
195
400
70
180
370
80
170
350
90
160
320
100
150
305
Maximum capacity of pipe in cubic feet of gas per hour. (Based upon
a pressure drop of 0.3 inch water column and 0.6 specific gravity
gas).
Unitary Products Group
Two grommets are shipped in the blower compartment
(in parts bag taped to the blower housing) of every unit
with gas heat and should be used in the knockouts
when the gas piping penetrates the front of the unit.
After the gas supply piping has been installed, the bottom opening in the unit should be sealed to prevent
water from leaking into the building.
Gas piping recommendations:
1. A drip leg and a ground joint union must be
installed in the gas piping.
2. When required by local codes, a manual shut-off
valve may have to be installed outside of the unit.
3. Use wrought iron or steel pipe for all gas lines. Pipe
compound should be applied sparingly to male
threads only.
21
129963-YIM-A-0605
supply piping system at test pressures equal to or
less than 1/2 psig (3.48kPa).
Natural gas may contain some propane. Propane, being an excellent solvent, will quickly
dissolve white lead or most standard commercial compounds. Therefore, a special pipe
compound must be applied when wrought iron
or steel pipe is used. Shellac base compounds
such as Gaskolac or Stalastic, and compounds
such as Rectorseal #5, Clyde's or John Crane
may be used.
7. A 1/8 inch NPT plugged tap, accessible for test
gage connection, must be installed immediately
upstream of the gas supply connection to the furnace.
4. All piping should be cleaned of dirt and scale by
hammering on the outside of the pipe and blowing
out the loose dirt and scale. Before initial start-up,
be sure that all of the gas lines external to the unit
have been purged of air.
5. The gas supply should be a separate line and
installed in accordance with all safety codes as
prescribed under "Limitations". After the gas connections have been completed, open the main
shut-off valve admitting normal gas pressure to the
mains. Check all joints for leaks with soap solution
or other material suitable for the purpose. NEVER
USE A FLAME.
FIGURE 6 - EXTERNAL SUPPLY CONNECTION
EXTERNAL SHUT-OFF
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARNING EXACTLY COULD RESULT IN SERIOUS
INJURY, DEATH OR PROPERTY DAMAGE.
NEVER TEST FOR GAS LEAKS WITH AN
OPEN FLAME. USE A COMMERICALLY
AVAILABLE SOAP SOLUTION MADE SPECIFICALLY FOR THE DETECTION OF
LEAKS TO CHECK ALL CONNECTIONS. A
FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
6. The furnace and its individual manual shut-off
valve must be disconnected from the gas supply
piping system during any pressure testing of that
system at test pressures in excess of 1/2 psig
(3.48kPa).
The furnace must be isolated from the gas supply
piping system by closing its individual manual shutoff valve during any pressure testing of the gas
22
FIGURE 7 - BOTTOM SUPPLY CONNECTION
EXTERNAL SHUT-OFF
L.P. UNITS, TANKS AND PIPING
All gas heat units are shipped from the factory
equipped for natural gas use only. The unit may be
converted in the field for use with L.P./propane gas
with accessory kit model number 1NP0418.
All L.P./propane gas equipment must conform to the
safety standards of the National Fire Protection Association.
Unitary Products Group
129963-YIM-A-0605
For satisfactory operation, L.P./propane gas pressure
must be 8.8 I.W.C. at the unit manifold under full load.
Maintaining proper gas pressure depends on three
main factors:
1. The vaporization rate depends on (a) the temperature of the liquid and (b) the "wetted surface" area
of the container or containers.
2. The proper pressure regulation. (Two-stage regulation is recommended from the standpoint of both
cost and efficiency.)
3. The pressure drop in the lines between regulators
and between the second stage regulator and the
appliance. Pipe size required will depend on the
length of the pipe run and the total load of all appliances.
Complete information regarding tank sizing for vaporization, recommended regulator settings, and pipe sizing is available from most regulator manufacturers and
L.P./propane gas suppliers.
L.P./propane gas is an excellent solvent and special
pipe compound must be used when assembling piping
for this gas as it will quickly dissolve white lead or most
standard commercial compounds. Shellac base compounds such as Rectorseal #5 are satisfactory for this
type of gas.
the blower compartment. These hoods must be
installed to assure proper unit function. All hoods must
be fastened to the outside of the gas heat access panel
with the screws provided in the bag also attached to
the blower housing.
The screen for the combustion air intake hood is
secured to the inside of the access panel opening with
four fasteners and the screws used for mounting the
hood to the panel. The top flange of this hood slips in
under the top of the access panel opening when installing. Refer to Vent and Combustion Air Hood Figure 8.
Each vent hood is installed by inserting the top flange
of the hood into the slotted opening in the access panel
and securing in place.
The products of combustion are discharged horizontally through these two screened, hooded vent openings on the upper gas heat access panel.
VENT AIR
OUTLET
HOODS
SLOTTED
OPENINGS IN
ACCESS PANEL
Check all connections for leaks when piping is completed, using a soap solution. NEVER USE A FLAME.
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARNING EXACTLY COULD RESULT IN SERIOUS
INJURY, DEATH OR PROPERTY DAMAGE.
NEVER TEST FOR GAS LEAKS WITH AN
OPEN FLAME. USE A COMMERICALLY
AVAILABLE SOAP SOLUTION MADE SPECIFICALLY FOR THE DETECTION OF
LEAKS TO CHECK ALL CONNECTIONS. A
FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
VENT AND COMBUSTION AIR HOODS
Two vent hoods and a combustion air hood (with
screens) are shipped attached to the blower housing in
Unitary Products Group
COMBUSTION
AIR INTAKE
HOOD
GAS HEAT
ACCESS
PANELS
FIGURE 8 - VENT AND COMBUSTION AIR HOOD
OPTIONAL ECONOMIZER/MOTORIZED DAMPER
RAIN HOOD
The instruction for the optional economizer/motorized
damper rain hood can be found in form 035-19854000. Use these instructions when field assembling an
economizer rain hood onto a unit. The outdoor and
return air dampers, the damper actuator, the damper
linkage, the outdoor and return air divider baffles, and
all the control sensors are factory mounted as part of
the "Factory installed" economizer option.
23
129963-YIM-A-0605
OPTIONAL POWER EXHAUST/BAROMETRIC
RELIEF DAMPER AND RAIN HOOD
The instructions for the power exhaust/barometric relief
damper and rain hood can be found in form 03519856-000. The exhaust fan, all supporting brackets,
angles, and the wiring are factory installed as part of
the power exhaust option.
ENTHALPY SET POINT ADJUSTMENT
The enthalpy set point may now be set by selecting the
desired setpoint shown in the Enthalpy Setpoint Adjustment Figure 9. Adjust as follows:
•
All of the components, including the dampers, hardware, and mounting instructions are shipped in a single
package external from the unit. The hood must be field
assembled and installed.
For a single enthalpy operation carefully turn the
set point adjusting screw (found on the damper
control module) to the "A", "B", "C" or "D" setting
corresponding to the lettered curve of the Enthalpy
Setpoint Adjustment Figure 9.
•
For a dual enthalpy operation, carefully turn the set
point adjusting screw fully clockwise past the "D"
setting.
Power exhaust is not available as a field installed
accessory.
POWER EXHAUST DAMPER SETPOINT (WITH OR WITHOUT POWER EXHAUST)
OPTIONAL ECONOMIZER AND POWER EXHAUST
DAMPER SET POINT ADJUSTMENTS AND INFORMATION
•
With no power exhaust option, adjust the Exhaust
Air Adjustment Screw fully clockwise. This will
allow 2nd stage cooling to operate.
•
With power exhaust option, each building pressurization requirement will be different. The point at
which the power exhaust comes on is determined
by the economizer damper position (Percent
Open). The Exhaust Air Adjustment Screw should
be set at the Percent Open of the economizer
damper at which the power exhaust is needed. It
can be set from 0 to 100% damper open.
Remove the economizer access panel from the unit.
Loosen but do not remove the two panel latches.
Locate the economizer control module, where the following adjustments will be made.
INDOOR AIR QUALITY AQ
EXTREME CARE MUST BE EXCERCISED IN
TURNING ALL SETPOINT, MAXIMIUM, AND
MINIMUM DAMPER POSITIONING ADJUSTMENT SCREWS TO PREVENT TWISTING
THEM OFF.
Check that the damper blades move smoothly without
binding; carefully turn the Minimum Position Adjusting
screw (found on the damper control module) fully
clockwise and then set the thermostat indoor fan switch
to the on position and then off, or energize and deenergize terminals "R" to "G".
MINIMUM POSITION ADJUSTMENT
With thermostat set to indoor fan on position, or terminals "R" to "G" energized, turn the Minimum Position
Adjusting screw (located on the damper control module) counterclockwise until the desired minimum
damper position has been attained.
Indoor Air quality (indoor sensor input): Terminal AQ
accepts a +2 to +10 Vdc signal with respect to the
(AQ1) terminal. When the signal is below it's setpoint,
the actuator is allowed to modulate normally in accordance with the enthalpy and mixed air sensor inputs.
When the AQ signal exceeds it's setpoint setting and
there is no call for free cooling, the actuator is proportionately modulated from the 2 to 10 Vdc signal, with 2
Vdc corresponding to full closed and 10 Vdc corresponding to full open. When there is no call for free
cooling, the damper position is limited by the IAQ Max
damper position setting. When the signal exceeds it's
setpoint (Demand Control Ventilation Setpoint) setting
and there is a call for free cooling, the actuator modulates from the minimum position to the full open position based on the highest call from either the mixed air
sensor input or the AQ voltage input.
•
•
Optional CO2 Space Sensor Kit Part #
2AQ04700324
Optional CO2 Unit Sensor Kit Part # 2AQ04700424
Replace the economizer access panel.
24
Unitary Products Group
129963-YIM-A-0605
FIGURE 9 - ENTHALPY SETPOINT ADJUSTMENT
Unitary Products Group
25
129963-YIM-A-0605
Exhaust Air
Adjustment
Screw
Exhaust Air LED
Damper Min.
Position
Screw
Indoor Air Quality
Max. Adjustment
Screw
N1
N
EXH
Set
TR
P1
P
EXH
24
Vac
HOT
T1
T
Min
Pos
AQ1
AQ
IAQ
SO
IAQ
Min
24
Vac
COM
+
IAQ
Max
Indoor Air Quality
LED
TR1
1
2
5
Indoor Air Quality
Min. Adjustment
Screw
SO+
3
4
EF
EF1
Free
Cool
Free Cooling LED
SR+
SR
B
A
C
D
Economizer Enthalpy
Set Point Adjustment
Screw
FIGURE 10 - HONEYWELL ECONOMIZER CONTROL W7212
B
F
E
D
C
A
FRONT
D
A
C
FRONT
B
FIGURE 11 - FOUR AND SIX POINT LOADS
26
Unitary Products Group
129963-YIM-A-0605
TABLE 6: DH 180, 210, 240 FOUR AND SIX POINT LOAD WEIGHT DISTRIBUTION
UNIT MODEL
OPERATING
WEIGHT
(lb)
A
B
C
D
DH180C00
1900
445
484
506
465
DH180N24
2100
492
535
559
514
DH180N32
2140
501
545
570
524
DH210C00
1950
457
497
519
477
DH210N24
2150
504
548
572
526
DH210N32
2190
513
558
583
536
DH240C00
2100
492
535
559
514
DH240N24
2300
539
586
612
563
DH240N32
2340
548
596
623
573
UNIT MODEL
OPERATING
WEIGHT
(lb)
A
B
C
D
E
F
DH180C00
1900
293
306
323
342
327
309
DH180N24
2100
324
338
357
378
362
342
DH180N32
2140
330
344
364
385
369
348
DH210C00
1950
300
314
332
351
336
317
DH210N24
2150
331
346
366
387
370
350
DH210N32
2190
337
352
372
394
377
357
DH240C00
2100
324
338
357
378
362
342
DH240N24
2300
354
370
391
414
396
374
DH240N32
2340
360
377
398
421
403
381
7RQ
FIGURE 12 - CENTER OF GRAVITY
Unitary Products Group
27
129963-YIM-A-0605
TABLE 7: PHYSICAL DATA
MODELS
EVAPORATOR
BLOWER
Centrifugal Blower (Dia. x Wd. in.)
Fan Motor HP
Rows Deep
EVAPORATOR
COIL
Fins Per Inch
Face Area (Sq. Ft.
CONDENSER
FANS
(Two Per Unit)
Propeller Dia. (in.) (Each)
CONDENSER
COILS
(Two Per Unit)
Rows Deep (Each)
COMPRESSOR
(Qty. Per Unit)
Fan Motor Hp (Each)
Nom. CFM (Each)
Fins Per Inch (Each)
Face Area (Sq. Ft.) (Total)
7.5 Ton Scroll
10 Ton Scroll
Quantity Per Unit (16” X 20” X 2” or 4”)
AIR
FILTERS
Quantity Per Unit (16” X 25” X 2” or 4”)
Quantity Per Unit (18” X 24” X 2” or 4”)
Total Face Area (sq. ft.)
CHARGE
Refrigerant 22
(lbs./oz.)
System #1
System #2
180
DH
210
240
15 x 15
5
4
13.5
15.5
30
1
5765
3
13
36.0
2
5
15.0
23/10
21/10
18 x 15
7.5
4
13.5
20.0
30
1
7000
3
15
43.3
2
4
4
20.0
24/0
24/8
18 x 15
7.5
4
13.5
20.0
30
1
7000
3
15
43.3
2
4
4
20.0
24/2
27/2
TABLE 8: OPERATING WEIGHTS (LBS.)
MODEL SIZE
15 TON
17.5 TON
20 TON
1900
1950
2100
240Mbh
2100
2150
2300
320Mbh
2140
2190
2340
DH (Cooling Only)
BASIC
UNIT
OPTIONS
DH
(Gas/Electric)
Economizer
Economizer with
Power Exhaust
Motorized Damper
Electric Heater
160
245
Roof Curb
ACCY.
28
150
25
30
35
40
18kW
36kW
54kW
72kW
Barometric Damper
Economizer/Motorized Damper Rain Hood
Economizer/Power Exhaust Rain Hood
Wood Skid
175
185
185
45
55
90
220
Unitary Products Group
129963-YIM-A-0605
TABLE 9: DH ELECTRICAL DATA WITHOUT POWERED CONVENIENCE OUTLET
COMPRESSORS
MODEL
VOLTAGE
TONNAGE
RLA
EACH
LRA
EACH
ID
CONV
OD FAN
BLOWER
OUTLET
MOTORS
MOTOR
MODEL
AMPS
FLA EACH
FLA
208-3-60
21.8
184
4.5
12.8
0.0
230-3-60
21.8
184
4.3
12.8
0.0
460-3-60
11.0
90
2.2
6.4
0.0
575-3-60
9.6
73
1.7
5.2
0.0
208-3-60
25.6
190
4.5
20.0
0.0
230-3-60
25.6
190
4.3
20.0
0.0
460-3-60
12.8
95
2.2
10.0
0.0
575-3-60
10.2
75
1.7
7.5
0.0
208-3-60
32.1
237
4.5
20.0
0.0
230-3-60
32.1
237
4.3
20.0
0.0
460-3-60
14.3
130
2.2
10.0
0.0
575-3-60
12.9
85
1.7
7.5
0.0
DH180
DH210
DH240
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
HEATER OPTION
KW
STAGES
AMPS
-13.5
27
40.6
54.1
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-13.5
27
40.6
54.1
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-13.5
27
40.6
54.1
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-37.5
74.9
112.7
150.2
-43.3
86.6
129.9
173.2
-21.7
43.3
65.0
86.6
-17.3
34.6
52.0
69.3
-37.5
74.9
112.7
150.2
-43.3
86.6
129.9
173.2
-21.7
43.3
65.0
86.6
-17.3
34.6
52.0
69.3
-37.5
74.9
112.7
150.2
-43.3
86.6
129.9
173.2
-21.7
43.3
65.0
86.6
-17.3
34.6
52.0
69.3
MAX.
MIN.
FUSE/
CIRCUIT
1
AMPACITY BRKR
SIZE
(AMPS)
(AMPS)
70.9
70.9
109.7
156.9
166.2
70.5
70.5
124.3
145.9
189.2
35.6
35.6
62.1
73.0
94.6
30.2
30.2
49.8
58.5
75.8
86.6
86.6
118.7
165.9
175.2
86.2
86.2
133.3
154.9
198.2
43.2
43.2
66.6
77.5
99.1
33.9
33.9
52.7
61.3
78.7
101.2
101.2
118.7
165.9
175.2
100.8
100.8
133.3
154.9
198.2
46.6
46.6
66.6
77.5
99.1
39.9
39.9
52.7
61.3
78.7
90
90
110
175
200
90
90
125
175
225
45
45
70
80
110
35
35
50
70
90
110
110
125
175
200
110
110
150
175
225
50
50
70
90
110
40
40
60
70
90
125
125
125
175
200
125
125
150
175
225
60
60
70
90
110
50
50
60
70
90
NOTE 1: HACR Type per NEC.
Unitary Products Group
29
129963-YIM-A-0605
TABLE 10: DH ELECTRICAL DATA WITH POWERED CONVENIENCE OUTLET
COMPRESSORS
MODEL
VOLTAGE
TONNAGE
RLA
EACH
LRA
EACH
ID
CONV
OD FAN
BLOWER
OUTLET
MOTORS
MOTOR
MODEL
AMPS
FLA EACH
FLA
208-3-60
21.8
184
4.5
12.8
10.0
230-3-60
21.8
184
4.3
12.8
10.0
460-3-60
11.0
90
2.2
6.4
5.0
575-3-60
9.6
73
1.7
5.2
4.0
208-3-60
25.6
190
4.5
20.0
10.0
230-3-60
25.6
190
4.3
20.0
10.0
460-3-60
12.8
95
2.2
10.0
5.0
575-3-60
10.2
75
1.7
7.5
4.0
208-3-60
32.1
237
4.5
20.0
10.0
230-3-60
32.1
237
4.3
20.0
10.0
460-3-60
14.3
130
2.2
10.0
5.0
575-3-60
12.9
85
1.7
7.5
4.0
DH180
DH210
DH240
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
None
E18
E36
E54
E72
HEATER OPTION
KW
STAGES
AMPS
-13.5
27
40.6
54.1
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-13.5
27
40.6
54.1
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-13.5
27
40.6
54.1
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-18.0
36.0
54.0
72.0
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-1
2
2
2
-37.5
74.9
112.7
150.2
-43.3
86.6
129.9
173.2
-21.7
43.3
65.0
86.6
-17.3
34.6
52.0
69.3
-37.5
74.9
112.7
150.2
-43.3
86.6
129.9
173.2
-21.7
43.3
65.0
86.6
-17.3
34.6
52.0
69.3
-37.5
74.9
112.7
150.2
-43.3
86.6
129.9
173.2
-21.7
43.3
65.0
86.6
-17.3
34.6
52.0
69.3
MAX.
MIN.
FUSE/
CIRCUIT
1
AMPACITY BRKR
SIZE
(AMPS)
(AMPS)
80.9
80.9
122.2
169.4
178.7
80.5
82.6
136.8
158.4
201.7
40.6
41.3
68.4
79.2
100.9
34.2
34.2
54.8
63.5
80.8
96.6
96.6
131.2
178.4
187.7
96.2
96.2
145.8
167.4
210.7
48.2
48.2
72.9
83.7
105.4
37.9
37.9
57.7
66.3
83.7
111.2
111.2
131.2
178.4
187.7
110.8
110.8
145.8
167.4
210.7
51.6
51.6
72.9
83.7
105.4
43.9
43.9
57.7
66.3
83.7
100
100
125
175
200
100
100
150
175
225
50
50
70
90
110
40
40
60
70
90
110
110
150
200
200
110
110
150
175
225
60
60
80
90
110
45
45
60
70
90
125
125
150
200
200
125
125
150
175
225
60
60
80
90
110
50
50
60
70
90
NOTE 1: HACR Type per NEC.
30
Unitary Products Group
129963-YIM-A-0605
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FIGURE 13 - UNIT DIMENSIONS & CLEARANCES
TABLE 11: MINIMUM CLEARANCES
LOCATION
TABLE 12: UTILITIES ENTRY
CLEARANCE
Front
36”
Back
24” (Less Economizer)
49” (With Economizer
Left Side (Filter Access)
24” (Less Economizer)
36” (With Economizer)
Right Side (Cond. Coil)
36”
Below Unit1
0”
Above Unit2
72” With 36” Maximum
Horizontal Overhang (For
Condenser Air Discharge)
1.
Units may be installed on combustible floors made
from wood or class A, B, or C roof covering material.
2.
Units must be installed outdoors. Overhanging structures or shrubs should not obstruct condenser air discharge outlet.
NOTE:
NOTE:
A 1” clearance must be provided between any combustible material and the supply air ductwork for a distance
of 3 feet from the unit.
The products of combustion must not be allowed to
accumulate within a confined space and recirculate.
Unitary Products Group
HOLE
A
OPENING SIZE (DIA.)
1-1/8” KO
USED FOR
Control Wiring
3/4” NPS (Fem.)
B
3-5/8” KO
3” NPS (Fem.)
Front
Bottom
Power Wiring
Front
Bottom
C
2-3/8” KO
Gas Piping (Front)1
D
1-11/16” Hole
Gas Piping (Bottom)1,2
1.
One-inch Gas Piping MPT Required.
2.
Opening in the bottom to the unit can be located by the
side in the insulation.
NOTE:
Locate unit so that the vent air outlet hood is at least:
• Three (3) feet above any force air inlet located within
10 horizontal feet (excluding those integral to the
unit).
• Four (4) feet below, 4 horizontal feet from, or 1 foot
above any door or gravity air inlet into the building.
• Four (4) feet from electric and gas meters, regulators
and relief equipment.
NOTE:
All entry holes should be field sealed to prevent rain
water entry into building.
31
129963-YIM-A-0605
DUCT COVERS - Units are shipped with the bottom duct
openings covered. An accessory flange kit is available for
connecting side ducts.
For bottom duct applications:
1. Remove the side panels from the supply and return air
compartments to gain access to the bottom supply and
return air duct covers.
2. Remove and discard the bottom duct covers (Duct openings are closed with sheet metal covers except when the
unit includes a power exhaust option. The covering consists of a heavy black paper composition.)
3. Replace the side supply and return air compartment panels.
For side duct application:
1. Replace the side panels on the supply and return air compartments with the accessory flange kit panels.
2. Connect ductwork to the duct flanges on the rear of the
unit.
7RQ
DETAIL “X”
ACCESSORY SIDE SUPPLY AND RETURN AIR OPENINGS
S U P P L Y A IR
C O M P A R T M E N T
P O W E R E X H A U S T
R A IN H O O D
( o n R e tu r n A ir C o m p a r tm e n t)
E C O
M O T
D A M
R A IN
(o n O
N O M IZ E R
O R IZ E D
P E R
H O O D
u td o o r A ir C o m p a r tm e n t)
E C O N O M IZ E R / M O T O R IZ E D D A M P E R
A N D P O W E R E X H A U S T R A IN H O O D S
F IX E
O U T
IN T A
( lo c a
R e tu
C o m
3 4 -1 /4 "
D
D O O R A IR
K E H O O D
te d o n
r n A ir
p a rtm e n t)
1 " C O N D E N S T A T E
D R A IN
(M u s t b e tra p p e d )
1 6 -1 /8 "
5 "
3 6 "
6 6 -1 /2 "
R E A R V IE W
2 "
9 2 "
3 6 -1 /4 "
D E T A IL "Y "
U N IT W IT H R A IN H O O D S
L H
V IE W
FIGURE 13 - DIMENSIONS & CLEARANCES 15 & 20 TON (CONTINUED)
32
Unitary Products Group
129963-YIM-A-0605
CFM, STATIC PRESSURE, AND POWER - ALTITUDE AND TEMPERATURE CORRECTIONS
order to use the indoor blower tables for high altitude applications, certain corrections are necessary.
The information below should be used to assist in application
of product when being applied at altitudes at or exceeding
1000 feet above sea level.
A centrifugal fan is a "constant volume" device. This means
that, if the rpm remains constant, the CFM delivered is the
same regardless of the density of the air. However, since the
air at high altitude is less dense, less static pressure will be
generated and less power will be required than a similar
application at sea level. Air density correction factors are
shown in Table 13 and Figure 14.
The air flow rates listed in the standard blower performance
tables are based on standard air at sea level. As the altitude
or temperature increases, the density of air decreases. In
TABLE 13: ALTITUDE CORRECTION FACTORS
AIR TEMP
40
50
60
70
80
90
100
0
1.060
1.039
1.019
1.000
0.982
0.964
0.946
1000
1.022
1.002
0.982
0.964
0.947
0.929
0.912
2000
0.986
0.966
0.948
0.930
0.913
0.897
0.880
3000
0.950
0.931
0.913
0.896
0.880
0.864
0.848
ALTITUDE (FEET)
4000
5000
0.916
0.882
0.898
0.864
0.880
0.848
0.864
0.832
0.848
0.817
0.833
0.802
0.817
0.787
6000
0.849
0.832
0.816
0.801
0.787
0.772
0.758
7000
0.818
0.802
0.787
0.772
0.758
0.744
0.730
8000
0.788
0.772
0.757
0.743
0.730
0.716
0.703
9000
0.758
0.743
0.729
0.715
0.702
0.689
0.676
10000
0.729
0.715
0.701
0.688
0.676
0.663
0.651
The examples below will assist in determining the airflow performance of the product at altitude.
blower tables to select the blower speed and the BHP
requirement.
Example 1: What are the corrected CFM, static pressure,
and BHP at an elevation of 5,000 ft. if the blower performance
data is 6,000 CFM, 1.5 IWC and 4.0 BHP?
Solution: As in the example above, no temperature information is given so 70°F is assumed.
Solution: At an elevation of 5,000 ft the indoor blower will still
deliver 6,000 CFM if the rpm is unchanged. However, Table
13 must be used to determine the static pressure and BHP.
Since no temperature data is given, we will assume an air
temperature of 70°F. Table 13 shows the correction factor to
be 0.832.
The 1.5" static pressure given is at an elevation of 5,000 ft.
The first step is to convert this static pressure to equivalent
sea level conditions.
Sea level static pressure = 1.5 / .832 = 1.80"
Enter the blower table at 6000 sCFM and static pressure of
1.8". The rpm listed will be the same rpm needed at 5,000 ft.
Corrected static pressure = 1.5 x 0.832 = 1.248 IWC
Corrected BHP = 4.0 x 0.832 = 3.328
Example 2: A system, located at 5,000 feet of elevation, is to
deliver 6,000 CFM at a static pressure of 1.5". Use the unit
Unitary Products Group
Suppose that the corresponding BHP listed in the table is 3.2.
This value must be corrected for elevation.
BHP at 5,000 ft = 3.2 x .832 = 2.66
33
129963-YIM-A-0605
FIGURE 14 - ALTITUDE/TEMPERATURE CONVERSION FACTOR
34
Unitary Products Group
129963-YIM-A-0605
TABLE 14: SUPPLY AIR BLOWER PERFORMANCE (15 TON) - COOLING ONLY
180 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)*
CFM
4500
ESP
BHP
5250
KW
ESP
BHP
6000
KW
ESP
BHP
6750
KW
ESP
BHP
7200
KW
ESP
BHP
KW
208 VOLT AND STANDARD DRIVE
850
6.0**
0.9
2.4
2.2
0.7
3.0
2.7
0.5
3.2
2.9
-
-
-
-
-
-
870
5.5
1.0
2.5
2.3
0.8
3.1
2.8
0.6
3.5
3.1
0.2
4.1
3.7
-
-
-
915
4.5
1.1
2.6
2.4
0.9
3.4
3.0
0.7
3.7
3.3
0.3
4.4
3.9
0.2
4.5
4.0
965
3.5
1.2
2.9
2.6
1.0
3.6
3.2
0.8
4.0
3.6
0.5
4.7
4.2
0.4
4.9
4.4
980
3.0
1.3
3.0
2.7
1.1
3.7
3.3
0.9
4.1
3.7
0.6
4.8.
4.3
0.5
5.1
4.6
1010
2.0
1.4
3.1
2.8
1.2
3.8
3.4
1.0
4.2
3.8
0.7
5.0
4.5
0.6
5.4
4.8
1040
1.0
1.5
3.2
2.9
1.3
3.9
3.5
1.1
4.5
4.0
0.9
5.2
4.7
0.7
5.7
5.1
4.4
208 VOLT AND HIGH SPEED DRIVE
965
6.0
1.2
2.9
2.6
1.0
3.6
3.2
0.8
4.0
3.6
0.5
4.7
4.2
0.4
5.0
980
5.5
1.3
3.0
2.7
1.1
3.7
3.3
0.9
4.1
3.7
0.6
4.8
4.3
0.5
5.1
4.6
1025
4.5
1.5
3.2
2.9
1.3
3.9
3.5
1.1
4.5
4.0
0.8
5.1
4.6
0.7
5.6
5.0
1065
3.5
1.6
3.4
3.0
1.4
4.0
3.6
1.2
4.7
4.2
1.0
5.5
4.9
-
-
-
1095
3.0
1.7
3.5
3.1
1.5
4.2
3.8
1.3
4.9
4.4
1.2
5.7
5.1
-
-
-
1130
2.0
1.9
3.7
3.3
1.7
4.5
4.0
1.5
5.1
4.6
-
-
-
-
-
-
1170
1.0
2.1
3.9
3.5
2.0
4.7
4.2
1.8
5.5
4.9
-
-
-
-
-
-
230/460/575 VOLT AND STANDARD DRIVE
870
6.0**
1.0
2.4
2.2
0.8
3.1
2.8
0.6
3.5
3.1
0.2
4.1
3.7
-
-
-
915
5.0
1.1
2.6
2.4
0.9
3.3
3.0
0.7
3.7
3.3
0.3
4.4
3.9
0.2
4.5
4.0
965
4.0
1.2
2.9
2.6
1.0
3.6
3.2
0.8
4.0
3.6
0.5
4.7
4.2
0.4
5.0
4.4
980
3.5
1.3
3.0
2.7
1.1
3.7
3.3
0.9
4.1
3.7
0.6
4.8
4.3
0.5
5.1
4.6
1040
2.0
1.5
3.2
2.9
1.3
3.9
3.5
1.1
4.5
4.0
0.9
5.3
4.7
0.7
5.7
5.1
1065
1.0
1.6
3.3
3.0
1.4
4.0
3.6
1.2
4.7
4.2
1.0
5.5
4.9
-
-
-
230/460/575 VOLT AND HIGH SPEED DRIVE
980
6.0
1.3
2.9
2.6
1.1
3.7
3.3
0.9
4.1
3.7
0.6
4.8
4.3
0.5
5.1
4.6
1040
4.5
1.5
3.2
2.9
1.3
3.9
3.5
1.1
4.5
4.0
0.9
5.3
4.7
0.7
5.7
5.1
1065
4.0
1.6
3.4
3.0
1.4
4.0
3.6
1.2
4.7
4.2
1.0
5.5
4.9
-
-
-
1095
3.5
1.7
3.5
3.1
1.5
4.2
3.8
1.3
4.9
4.4
1.2
5.7
5.1
-
-
-
1130
2.5
1.9
3.7
3.3
1.7
4.5
4.0
1.5
5.1
4.6
-
-
-
-
-
-
1170
1.5
2.1
3.9
3.5
2.0
4.7
4.2
1.8
5.5
4.9
-
-
-
-
-
-
1190
1.0
2.2
4.0
3.6
2.1
4.8
4.3
2.0
5.7
5.1
-
-
-
-
-
-
NOTES:
1. Blower performance includes fixed outdoor air, 2” T/A filters, a dry evaporator coil and no electric heat.
2. Refer to Table 20 for additional static resistances.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the
total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
Unitary Products Group
35
129963-YIM-A-0605
TABLE 15: SUPPLY AIR BLOWER PERFORMANCE (17.5 TON) - COOLING ONLY
210 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)*
CFM
6000
ESP
7000
8000
BHP
KW
ESP
BHP
KW
ESP
BHP
9000
KW
ESP
BHP
KW
208 VOLT AND STANDARD DRIVE
870
6.0**
0.4
2.1
1.8
0.1
2.3
2.0
-
-
-
-
-
-
900
5.0
0.8
3.2
2.7
0.5
3.5
2.9
0.2
3.8
3.2
-
-
-
930
4.0
1.1
4.1
3.4
0.9
4.5
3.8
0.6
4.9
4.1
0.1
5.1
4.3
950
3.0
1.3
4.6
3.9
1.1
5.1
4.3
0.8
5.5
4.6
0.4
5.9
5.0
980
2.0
1.6
5.3
4.5
1.4
5.8
4.9
1.2
6.3
5.3
0.7
6.9
5.8
1015
1.0
1.9
5.9
5.0
1.7
6.5
5.5
1.5
7.0
5.9
1.0
7.7
6.5
5.0
208 VOLT AND HIGH SPEED DRIVE
950
6.0
1.3
4.6
3.9
1.1
5.1
4.3
0.8
5.5
4.6
0.4
5.9
980
5.0
1.6
5.3
4.5
1.4
5.8
4.9
1.2
6.3
5.3
0.7
6.9
5.8
1010
4.0
1.8
5.8
4.9
1.7
6.3
5.3
1.5
6.9
5.8
1.0
7.5
6.3
1020
3.5
1.9
6.1
5.1
1.8
6.5
5.5
1.6
7.1
6.0
1.1
7.8
6.6
1035
3.0
2.0
6.2
5.2
1.9
6.8
5.7
1.7
7.4
6.2
1.2
8.1
6.8
1050
2.5
2.1
6.4
5.4
2.0
7.0
5.9
1.8
7.6
6.4
1.3
8.3
7.0
1075
2.0
2.3
6.6
5.5
2.1
7.2
6.0
1.9
7.8
6.6
1.5
8.6
7.2
1100
1.0
2.4
6.7
5.6
2.2
7.3
6.1
2.1
7.9
6.7
-
-
-
230/460/575 VOLT AND STANDARD DRIVE
870
6.0**
0.4
2.1
1.8
0.1
2.3
2.0
-
-
-
-
-
-
900
5.0
0.8
3.2
2.7
0.5
3.5
2.9
0.2
3.8
3.2
-
-
-
930
4.0
1.1
4.1
3.4
0.9
4.5
3.8
0.6
4.9
4.1
0.1
5.1
4.3
950
3.5
1.3
4.6
3.9
1.1
5.1
4.3
0.8
5.5
4.6
0.4
5.9
5.0
980
2.5
1.6
5.3
4.5
1.4
5.8
4.9
1.2
6.3
5.3
0.7
6.9
5.8
1015
1.5
1.9
5.9
5.0
1.7
6.5
5.5
1.5
7.0
5.9
1.0
7.7
6.5
1025
1.0
2.0
6.1
5.1
1.8
6.6
5.6
1.6
7.3
6.1
1.1
7.9
6.7
5.0
230/460/575 VOLT AND HIGH SPEED DRIVE
950
6.0
1.3
4.6
3.9
1.1
5.1
4.3
0.8
5.5
4.6
0.4
5.9
980
5.0
1.6
5.3
4.5
1.4
5.8
4.9
1.2
6.3
5.3
0.7
6.9
5.8
1015
4.0
1.9
5.9
5.0
1.7
6.5
5.5
1.5
7.0
5.9
1.0
7.7
6.5
1035
3.5
2.0
6.2
5.2
1.9
6.8
5.7
1.7
7.4
6.2
1.2
8.1
6.8
1050
3.0
2.1
6.4
5.4
2.0
7.0
5.9
1.8
7.6
6.4
1.3
8.3
7.0
1080
2.0
2.3
6.6
5.5
2.1
7.2
6.0
1.9
7.8
6.6
1.5
8.6
7.2
1100
1.5
2.4
6.7
5.6
2.2
7.3
6.1
2.1
7.9
6.7
-
-
-
1120
1.0
2.5
6.8
5.7
2.3
7.4
6.2
2.2
8.1
6.8
-
-
-
NOTES: 1.Blower performance includes fixed outdoor air, 2” T/A filters, a dry evaporator coil and no electric heat.
2.Refer to Table 13 for additional static resistances.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the total
static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
36
Unitary Products Group
129963-YIM-A-0605
TABLE 16: SUPPLY AIR BLOWER PERFORMANCE (20 TON) - COOLING ONLY
240 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)*
CFM
6000
ESP
7000
8000
BHP
KW
ESP
BHP
KW
ESP
BHP
9000
9400
KW
ESP
BHP
KW
ESP
BHP
KW
-
208 VOLT AND STANDARD DRIVE
870
6.0**
0.4
2.1
1.8
0.1
2.3
2.0
-
-
-
-
-
-
-
-
900
5.0
0.8
3.2
2.7
0.5
3.5
2.9
0.2
3.8
3.2
-
-
-
-
-
-
930
4.0
1.1
4.1
3.4
0.9
4.5
3.8
0.6
4.9
4.1
0.1
5.1
4.3
-
-
-
950
3.0
1.3
4.6
3.9
1.1
5.1
4.3
0.8
5.5
4.6
0.4
5.9
5.0
-
-
-
980
2.0
1.6
5.3
4.5
1.4
5.8
4.9
1.2
6.3
5.3
0.7
6.9
5.8
0.2
7.3
6.1
1015
1.0
1.9
5.9
5.0
1.7
6.5
5.5
1.5
7.0
5.9
1.0
7.7
6.5
0.6
8.2
6.9
208 VOLT AND HIGH SPEED DRIVE
950
6.0
1.3
4.6
3.9
1.1
5.1
4.3
0.8
5.5
4.6
0.4
5.9
5.0
-
-
-
980
5.0
1.6
5.3
4.5
1.4
5.8
4.9
1.2
6.3
5.3
0.7
6.9
5.8
0.2
7.3
6.1
1010
4.0
1.8
5.8
4.9
1.7
6.3
5.3
1.5
6.9
5.8
1.0
7.5
6.3
0.5
7.9
6.7
1020
3.5
1.9
6.1
5.1
1.8
6.5
5.5
1.6
7.1
6.0
1.1
7.8
6.6
0.6
8.3
7.0
1035
3.0
2.0
6.2
5.2
1.9
6.8
5.7
1.7
7.4
6.2
1.2
8.1
6.8
0.7
8.6
7.3
1050
2.5
2.1
6.4
5.4
2.0
7.0
5.9
1.8
7.6
6.4
1.3
8.3
7.0
-
-
-
1075
2.0
2.3
6.6
5.5
2.1
7.2
6.0
1.9
7.8
6.6
1.5
8.6
7.2
-
-
-
1100
1.0
2.4
6.7
5.6
2.2
7.3
6.1
2.1
7.9
6.7
-
-
-
-
-
-
230/460/575 VOLT AND STANDARD DRIVE
870
6.0**
0.4
2.1
1.8
0.1
2.3
2.0
-
-
-
-
-
-
-
-
900
5.0
0.8
3.2
2.7
0.5
3.5
2.9
0.2
3.8
3.2
-
-
-
-
-
-
930
4.0
1.1
4.1
3.4
0.9
4.5
3.8
0.6
4.9
4.1
0.1
5.1
4.3
-
-
-
950
3.5
1.3
4.6
3.9
1.1
5.1
4.3
0.8
5.5
4.6
0.4
5.9
5.0
-
-
-
980
2.5
1.6
5.3
4.5
1.4
5.8
4.9
1.2
6.3
5.3
0.7
6.9
5.8
0.2
7.3
6.1
1015
1.5
1.9
5.9
5.0
1.7
6.5
5.5
1.5
7.0
5.9
1.0
7.7
6.5
0.6
8.2
6.9
1025
1.0
2.0
6.1
5.1
1.8
6.6
5.6
1.6
7.3
6.1
1.1
7.9
6.7
0.7
8.6
7.3
230/460/575 VOLT AND HIGH SPEED DRIVE
950
6.0
1.3
4.6
3.9
1.1
5.1
4.3
0.8
5.5
4.6
0.4
5.9
5.0
-
-
-
980
5.0
1.6
5.3
4.5
1.4
5.8
4.9
1.2
6.3
5.3
0.7
6.9
5.8
0.2
7.3
6.1
1015
4.0
1.9
5.9
5.0
1.7
6.5
5.5
1.5
7.0
5.9
1.0
7.7
6.5
0.6
8.2
6.9
1035
3.5
2.0
6.2
5.2
1.9
6.8
5.7
1.7
7.4
6.2
1.2
8.1
6.8
0.7
8.6
7.3
1050
3.0
2.1
6.4
5.4
2.0
7.0
5.9
1.8
7.6
6.4
1.3
8.3
7.0
-
-
-
1080
2.0
2.3
6.6
5.5
2.1
7.2
6.0
1.9
7.8
6.6
1.5
8.6
7.2
-
-
-
1100
1.5
2.4
6.7
5.6
2.2
7.3
6.1
2.1
7.9
6.7
-
-
-
-
-
-
1120
1.0
2.5
6.8
5.7
2.3
7.4
6.2
2.2
8.1
6.8
-
-
-
-
-
-
NOTES:
1. Blower performance includes fixed outdoor air, 2” T/A filters, a dry evaporator coil and no electric heat.
2. Refer to Table 20 for additional static resistances.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the
total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
Unitary Products Group
37
129963-YIM-A-0605
TABLE 17: SUPPLY AIR BLOWER PERFORMANCE (15 TON) - GAS HEAT
180 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)*
CFM
4500
ESP
BHP
5250
KW
ESP
BHP
6000
KW
ESP
BHP
6750
KW
ESP
BHP
7200
KW
ESP
BHP
KW
208 VOLT AND STANDARD DRIVE
850
6.0**
0.9
2.4
2.1
0.6
2.9
2.6
0.3
3.4
3.0
-
-
-
-
-
-
870
5.5
1.0
2.5
2.2
0.7
3.0
2.7
0.4
3.5
3.1
-
-
-
-
-
-
915
4.5
1.1
2.6
2.4
0.8
3.1
2.8
0.5
3.6
3.2
0.2
4.1
3.7
-
-
-
965
3.5
1.2
2.7
2.5
0.9
3.2
2.9
0.6
3.7
3.3
0.4
4.4
3.0
0.2
5.0
4.5
980
3.0
1.3
2.9
2.6
1.0
3.4
3.0
0.7
3.8
3.4
0.5
4.5
4.0
0.3
5.1
4.6
1010
2.0
1.4
3.0
2.7
1.1
3.6
3.2
0.8
4.0
3.6
0.6
4.7
4.2
0.4
5.4
4.8
1040
1.0
1.6
3.2
2.9
1.3
3.8
3.4
1.0
4.4
3.9
0.8
5.0
4.5
0.6
5.6
5.0
4.5
208 VOLT AND HIGH SPEED DRIVE
965
6.0
1.2
2.7
2.5
0.9
3.2
2.9
0.6
3.7
3.3
0.4
4.4
3.9
0.2
5.0
980
5.5
1.3
2.9
2.6
1.0
3.4
3.0
0.7
3.8
3.4
0.5
4.5
4.0
0.3
5.1
4.6
1025
4.5
1.4
3.1
2.8
1.2
3.6
3.2
0.9
4.1
3.7
0.7
4.8
4.3
0.4
5.5
4.9
1065
3.5
1.6
3.4
3.0
1.4
3.9
3.5
1.1
4.5
4.0
0.9
5.1
4.6
-
-
-
1125
2.0
1.9
3.6
3.2
1.7
4.4
3.9
1.4
5.0
4.5
1.2
5.8
5.2
-
-
-
1170
1.0
2.1
3.9
3.5
1.9
4.7
4.2
1.6
5.5
4.9
-
-
-
-
-
-
230/460/575 VOLT AND STANDARD DRIVE
870
6.0**
1.0
2.5
2.2
0.7
3.0
2.7
0.4
3.5
3.1
-
-
-
-
-
-
915
5.0
1.1
2.6
2.4
0.8
3.1
2.8
0.5
3.6
3.2
0.2
4.1
3.7
-
-
-
965
4.0
1.2
2.7
2.5
0.9
3.2
2.9
0.6
3.7
3.3
0.4
4.4
3.9
0.2
5.0
4.5
980
3.5
1.3
2.9
2.6
1.0
3.4
3.0
0.7
3.8
3.4
0.5
4.5
4.0
0.3
5.1
4.6
1015
2.5
1.4
3.0
2.7
1.1
3.6
3.2
0.8
4.0
3.6
0.6
4.7
4.2
0.4
5.4
4.8
1050
1.5
1.5
3.1
2.8
1.2
3.7
3.3
0.9
4.2
3.8
0.7
4.9
4.4
0.5
5.7
5.1
1065
1.0
1.6
3.4
3.0
1.4
3.9
3.5
1.1
4.5
4.0
0.9
5.1
4.6
-
-
-
230/460/575 VOLT AND HIGH SPEED DRIVE
980
6.0
1.3
2.9
2.6
1.0
3.4
3.0
0.7
3.8
3.4
0.5
4.5
4.0
0.3
5.1
4.6
1045
4.5
1.6
3.2
2.9
1.3
3.8
3.4
1.0
4.4
3.9
0.8
5.0
4.5
0.6
5.6
5.0
1065
4.0
1.7
3.4
3.0
1.4
3.9
3.5
1.1
4.5
4.0
0.9
5.1
4.6
-
-
-
1125
2.5
1.9
3.6
3.2
1.7
4.4
3.9
1.4
5.0
4.5
1.2
5.8
5.2
-
-
-
1170
1.5
2.1
3.9
3.5
1.8
4.7
4.2
1.6
5.5
4.9
-
-
-
-
-
-
1190
1.0
2.2
4.0
3.6
1.9
4.8
4.3
1.7
5.6
5.0
-
-
-
-
-
-
NOTES:
38
1. Blower performance includes a gas-fired heat exchanger, fixed outdoor air, two-inch T/A filters and a dry evaporator coil.
2. Refer to the additional Static Resistances table.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the
total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
Unitary Products Group
129963-YIM-A-0605
TABLE 18: SUPPLY AIR BLOWER PERFORMANCE (17.5 TON) - GAS HEAT
210 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)*
CFM
6000
ESP
7000
8000
9000
BHP
KW
ESP
BHP
KW
ESP
BHP
KW
ESP
BHP
KW
-
208 VOLT AND STANDARD DRIVE
870
6.0**
1.3
3.6
3.0
0.7
4.3
3.7
0.2
5.1
4.3
-
-
900
5.0
1.4
3.8
3.2
0.9
4.7
4.0
0.4
5.6
4.7
-
-
-
930
4.0
1.6
4.1
3.4
1.1
5.0
4.2
0.6
5.9
5.0
0.1
6.7
5.7
950
3.0
1.7
4.2
3.6
1.3
5.1
4.3
0.8
6.0
5.1
0.2
6.9
5.8
980
2.0
1.9
4.5
3.8
1.5
5.4
4.5
1.0
6.3
5.3
0.4
7.2
6.1
995
1.5
2.1
4.6
3.9
1.6
5.5
4.7
1.1
6.4
5.4
0.5
7.5
6.3
1015
1.0
2.2
4.8
4.0
1.7
4.7
4.8
1.2
6.6
5.6
0.7
7.8
6.6
208 VOLT AND HIGH SPEED DRIVE
950
6.0
1.7
4.2
3.6
1.3
5.1
4.3
0.8
6.0
5.1
0.2
6.9
5.8
980
5.0
1.9
4.5
3.8
1.5
5.4
4.5
1.0
6.3
5.3
0.4
7.2
6.1
995
4.5
2.1
4.5
3.9
1.6
5.5
4.7
1.1
6.4
5.4
0.5
7.5
6.3
1025
3.5
2.3
4.9
4.1
1.8
5.8
4.9
1.3
6.7
5.7
0.7
8.0
6.7
1050
2.5
2.5
5.1
4.3
2.0
6.1
5.1
1.4
7.1
6.0
0.9
8.4
7.0
1065
2.0
2.6
5.3
4.4
2.1
6.3
5.3
1.5
7.3
6.2
1.0
8.6
7.2
1100
1.0
2.9
5.6
4.7
2.3
6.8
5.7
1.8
7.9
6.6
-
-
-
230/460/575 VOLT AND STANDARD DRIVE
870
6.0**
1.3
3.6
3.0
0.7
4.3
3.7
0.2
5.1
4.3
-
-
900
5.0
1.4
3.8
3.2
0.9
4.7
4.0
0.4
5.6
4.7
-
-
-
930
4.0
1.6
4.1
3.4
1.1
5.0
4.2
0.6
5.9
5.0
0.1
6.7
5.7
950
3.5
1.7
4.2
3.6
1.3
5.1
4.3
0.8
6.0
5.1
0.2
6.9
5.8
965
2.5
1.9
4.5
3.8
1.5
5.4
4.5
1.0
6.3
5.3
0.4
7.2
6.1
995
2.0
2.1
4.6
3.9
1.6
5.5
4.7
1.1
6.4
5.4
0.5
7.5
6.3
1015
1.5
2.2
4.8
4.0
1.7
5.7
4.8
1.2
6.6
5.6
0.6
7.8
6.6
1025
1.0
2.3
4.9
4.1
1.8
5.8
4.9
1.3
6.7
5.7
0.7
8.0
6.7
230/460/575 VOLT AND HIGH SPEED DRIVE
950
6.0
1.7
4.2
3.6
1.3
5.1
4.3
0.8
6.0
5.1
0.2
6.9
5.8
980
5.0
1.9
4.5
3.8
1.5
5.4
4.5
1.0
6.3
5.3
0.4
7.2
6.1
995
4.5
2.1
4.6
3.9
1.6
5.5
4.7
1.1
6.4
5.4
0.5
7.5
6.3
1015
4.0
2.2
4.8
4.0
1.7
5.7
4.8
1.2
6.6
5.6
0.6
7.8
6.6
1025
3.5
2.3
4.9
4.1
1.8
5.8
4.9
1.3
6.7
5.7
0.7
8.0
6.7
1050
3.0
2.5
5.1
4.3
2.0
6.1
5.1
1.4
7.1
6.0
0.9
8.4
7.0
1065
2.5
2.6
5.3
4.4
2.1
6.3
5.3
1.5
7.3
6.2
1.0
8.6
7.2
1100
1.5
2.9
5.6
4.7
2.3
6.8
4.7
1.8
7.9
6.6
-
-
-
1120
1.0
3.1
5.8
4.9
2.5
7.0
5.9
1.9
8.3
6.9
-
-
-
NOTES:
1. Blower performance includes a gas-fired heat exchanger, fixed outdoor air, two-inch T/A filters and a dry evaporator coil.
2. Refer to the additional Static Resistances table.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the
total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
Unitary Products Group
39
129963-YIM-A-0605
TABLE 19: SUPPLY AIR BLOWER PERFORMANCE (20 TON) - GAS HEAT
240 MBH - BOTTOM DUCT CONNECTIONS
BLOWER
SPEED,
(RPM)
MOTOR
PULLEY
(TURNS
OPEN)*
CFM
6000
ESP
BHP
7000
KW
ESP
BHP
8000
KW
ESP
BHP
9000
KW
ESP
BHP
9400
KW
ESP
BHP
KW
208 VOLT AND STANDARD DRIVE
870
6.0**
1.3
3.6
3.0
0.7
4.3
3.7
0.2
5.1
4.3
-
-
-
-
-
-
900
5.0
1.4
3.8
3.2
0.9
4.7
4.0
0.4
5.6
4.7
-
-
-
-
-
-
930
4.0
1.6
4.1
3.4
1.1
5.0
4.2
0.6
5.9
5.0
0.1
6.7
5.7
-
-
-
950
3.0
1.7
4.2
3.6
1.3
5.1
4.3
0.8
6.0
5.1
0.2
6.9
5.8
-
-
-
980
2.0
1.9
4.5
3.8
1.5
5.4
4.5
1.0
6.3
5.3
0.4
7.2
6.1
0.1
8.5
7.1
995
1.5
2.1
4.6
3.9
1.6
5.5
4.7
1.1
6.4
5.4
0.5
7.5
6.3
0.2
8.6
7.3
1015
1.0
2.2
4.8
4.0
1.7
4.7
4.8
1.2
6.6
5.6
0.7
7.8
6.6
-
-
-
208 VOLT AND HIGH SPEED DRIVE
950
6.0
1.7
4.2
3.6
1.3
5.1
4.3
0.8
6.0
5.1
0.2
6.9
5.8
-
-
-
980
5.0
1.9
4.5
3.8
1.5
5.4
4.5
1.0
6.3
5.3
0.4
7.2
6.1
0.1
8.5
7.1
995
4.5
2.1
4.5
3.9
1.6
5.5
4.7
1.1
6.4
5.4
0.5
7.5
6.3
0.2
8.6
7.3
1025
3.5
2.3
4.9
4.1
1.8
5.8
4.9
1.3
6.7
5.7
0.7
8.0
6.7
-
-
-
1050
2.5
2.5
5.1
4.3
2.0
6.1
5.1
1.4
7.1
6.0
0.9
8.4
7.0
-
-
-
1065
2.0
2.6
5.3
4.4
2.1
6.3
5.3
1.5
7.3
6.2
1.0
8.6
7.2
-
-
-
1100
1.0
2.9
5.6
4.7
2.3
6.8
5.7
1.8
7.9
6.6
-
-
-
-
-
-
230/460/575 VOLT AND STANDARD DRIVE
870
6.0**
1.3
3.6
3.0
0.7
4.3
3.7
0.2
5.1
4.3
-
-
-
-
-
-
900
5.0
1.4
3.8
3.2
0.9
4.7
4.0
0.4
5.6
4.7
-
-
-
-
-
-
930
4.0
1.6
4.1
3.4
1.1
5.0
4.2
0.6
5.9
5.0
0.1
6.7
5.7
-
-
-
950
3.5
1.7
4.2
3.6
1.3
5.1
4.3
0.8
6.0
5.1
0.2
6.9
5.8
-
-
-
965
2.5
1.9
4.5
3.8
1.5
5.4
4.5
1.0
6.3
5.3
0.4
7.2
6.1
0.1
8.5
7.1
995
2.0
2.1
4.6
3.9
1.6
5.5
4.7
1.1
6.4
5.4
0.5
7.5
6.3
0.2
8.6
7.3
1015
1.5
2.2
4.8
4.0
1.7
5.7
4.8
1.2
6.6
5.6
0.6
7.8
6.6
-
-
-
1025
1.0
2.3
4.9
4.1
1.8
5.8
4.9
1.3
6.7
5.7
0.7
8.0
6.7
-
-
-
230/460/575 VOLT AND HIGH SPEED DRIVE
950
6.0
1.7
4.2
3.6
1.3
5.1
4.3
0.8
6.0
5.1
0.2
6.9
5.8
-
-
-
980
5.0
1.9
4.5
3.8
1.5
5.4
4.5
1.0
6.3
5.3
0.4
7.2
6.1
0.1
8.5
7.1
995
4.5
2.1
4.6
3.9
1.6
5.5
4.7
1.1
6.4
5.4
0.5
7.5
6.3
0.2
8.6
7.3
1015
4.0
2.2
4.8
4.0
1.7
5.7
4.8
1.2
6.6
5.6
0.6
7.8
6.6
-
-
-
1025
3.5
2.3
4.9
4.1
1.8
5.8
4.9
1.3
6.7
5.7
0.7
8.0
6.7
-
-
-
1050
3.0
2.5
5.1
4.3
2.0
6.1
5.1
1.4
7.1
6.0
0.9
8.4
7.0
-
-
-
1065
2.5
2.6
5.3
4.4
2.1
6.3
5.3
1.5
7.3
6.2
1.0
8.6
7.2
-
-
-
1100
1.5
2.9
5.6
4.7
2.3
6.8
4.7
1.8
7.9
6.6
-
-
-
-
-
-
1120
1.0
3.1
5.8
4.9
2.5
7.0
5.9
1.9
8.3
6.9
-
-
-
-
-
NOTES:
40
1. Blower performance includes a gas-fired heat exchanger, fixed outdoor air, two-inch T/A filters and a dry evaporator coil.
2. Refer to the additional Static Resistances table.
ESP = External Static Pressure available for the supply and return air duct system. All internal unit resistances have been deducted from the
total static pressure of the blower.
* Do NOT close the pulley below 1 turn open.
** Factory setting.
Unitary Products Group
129963-YIM-A-0605
TABLE 20: STATIC RESISTANCES1
RESISTANCE, IWG
CFM
DESCRIPTION
15 TON
17.5 TON
4500
6000
7200
0.1
0.1
0.1
0.1
18 KW
0.1
0.1
0.1
36 KW
0.1
0.2
0.3
54 KW
0.2
0.3
72 KW
0.2
ECONOMIZER OPTION
HORIZONTAL DUCT CONNECTIONS2
WET INDOOR COIL
ELECTRIC HEAT OPTIONS
1.
6000
7500
20 TON
9400
6000
8000
9400
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.3
0.1
0.2
0.3
0.4
0.2
0.3
0.4
0.2
0.3
0.4
0.4
0.6
0.2
0.4
0.6
0.2
0.4
0.6
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.3
0.2
0.3
0.5
0.2
0.3
0.5
Deduct these resistance values from the available external static pressures shown in the respective Blower Performance Table (See Note 2 for
exception.)
Since the resistance to air flow will be less for horizontal duct connections than for bottom duct connections, add these pressures to the ESP values
on the respective unit’s blower performance table.
2.
TABLE 21: POWER EXHAUST PERFORMANCE
STATIC RESISTANCE OF RETURN DUCTWORK, IWG
MOTOR
SPEED
0.2
0.3
0.4
0.5
0.6
CFM
KW
CFM
KW
CFM
KW
CFM
KW
CFM
KW
0.99
HIGH*
5250
0.83
4500
0.85
4200
0.88
3750
0.93
3000
MEDIUM
4900
0.77
3900
0.79
3500
0.82
2900
0.85
-
-
LOW
4400
0.72
3700
0.74
3000
0.78
-
-
-
-
* Factory Setting
Power Exhaust motor is a 3/4 HP, PSC type with sleeve bearings, a 48 frame and inherent protection.
TABLE 22: BLOWER MOTOR AND DRIVE DATA
MODEL
SIZE
DRIVE
MOTOR1
BLOWER
RANGE
(RPM) HP FRAME EFF.
(%)
ADJUSTABLE MOTOR PULLEY
DESIGNATION
OUTSIDE
DIA.
(IN.)
PITCH
DIA.
(IN.)
BORE DESIG(IN.) NATION
Standard 850/1065
15 TON
High
Speed
Access
965/1190
5
184 T
83
1VP56
5.35
7.5
213 T
89
1VP68
6.75
4.3-5.3
2
1-1/8
Standard 870/1025
17.5 &
20 TON
1.
2.
High
Speed
Access
950/1120
5.5-6.5
2
1-3/8
BELT
(NOTCHED)
FIXED BLOWER PULLEY
OUTSIDE PITCH
DIA.
DIA.
(IN.)
(IN.)
PITCH
BORE DESIGLENGTH QTY.
(IN.) NATION
(IN.)
BK90
8.75
8.4
1
BX70
82.8
1
BK80
7.75
7.4
1
BX68
69.8
1
BK120
11.75
11.4
1-3/16
BX83
84.8
1
BK110
10.75
10.4
1-3/16
BX81
82.8
1
All motors have a nominal speed of 1800 RPM, a 1.15 service factor and a solid base. They can operate to the limit of their service factor
because they are located in the moving air, upstream of any heating device.
Do NOT close this pulley below 1 turn open.
Unitary Products Group
41
129963-YIM-A-0605
PHASING
Note the following:
YORK ® MODEL DH, units are properly phased at the
factory. Check for proper compressor rotation. If the
blower or compressors rotate in the wrong direction at
start-up, the electrical connection to the unit is misphased. Change the incoming line connection phasing
to obtain proper rotation. (Scroll compressors operate
in only one direction. If the scroll is drawing low amperage, has similar suction and discharge pressures, or
producing a high noise level, the scroll is misphased).
1. The supply air CFM must be within the limitations
shown in the Unit Application Data Table 1.
2. Pulleys can be adjusted in half turn increments.
3. The tension on the belt should be adjusted as
shown in the Belt Adjustment Figure 15.
Scroll compressors require proper rotation to
operate correctly. Units are properly phased at
the factory. Do not change the internal wiring to
make the blower, condenser fans, or compressor rotate correctly.
CHECKING SUPPLY AIR CFM
The RPM of the supply air blower will depend on the
required CFM, the unit accessories or options and the
static resistances of both the supply and the return air
duct systems. With this information, the RPM for the
supply air blower and the motor pulley adjustment
(turns open) can be determined from the Blower Performance Data Tables.
High speed drive accessories (containing a smaller
blower pulley and a shorter belt) are available for applications requiring the supply air blower to produce
higher CFM's and/or higher static pressures. Use
Model 1LD0416 for 15 ton units and Model 1LD0417
for 20 ton units. Refer to the Blower Motor and Drive
Data Table 22.
42
FIGURE 15 - BELT ADJUSTMENT
Unitary Products Group
129963-YIM-A-0605
AIR BALANCE
Start the supply air blower motor. Adjust the resistances in both the supply and the return air duct systems to balance the air distribution throughout the
conditioned space. The job specifications may require
that this balancing be done by someone other than the
equipment installer.
measuring the pressure drop across a wet coil
under field conditions would be inaccurate. To
assure a dry coil, the compressors should be deactivated while the test is being run.
4. Knowing the pressure drop across a dry coil, the
actual CFM through the unit can be determined
from the curve in Pressure Drop vs. Supply Air
CFM Figure 16.
To check the supply air CFM after the initial balancing
has been completed:
1. Remove the two 5/16" dot plugs from the blower
motor and the filter access panels shown in the
Dimensions and Clearances Figure 13.
2. Insert at least 8" of 1/4 inch tubing into each of
these holes for sufficient penetration into the air
flow on both sides of the indoor coil.
NOTE: The tubes must be inserted and held in a posi-
tion perpendicular to the air flow so that velocity pressure will not affect the static pressure
readings.
Failure to properly adjust the total system air
quantity can result in extensive blower damage.
After readings have been obtained, remove the tubes
and reinstall the two 5/16" dot plugs that were removed
in Step 1.
NOTE:
DE-ENERGIZE
THE
COMPRESSORS
BEFORE TAKING ANY TEST MEASUREMENTS TO ASSURE A DRY INDOOR COIL.
3. Using an inclined manometer, determine the pressure drop across a dry evaporator coil. Since the
moisture on an evaporator coil may vary greatly,
0%+
FIGURE 16 - PRESSURE DROP ACROSS A DRY INDOOR COIL VS SUPPLY AIR CFM FOR ALL UNIT
TONNAGES
Unitary Products Group
43
129963-YIM-A-0605
OPERATION
SEQUENCE OF OPERATIONS OVERVIEW
For these units, the thermostat makes a circuit
between "R" and "Y1" for the first stage of cooling.
15T only (if the ambient temperature is above 60ºF),
are energized. After completing the specified fan on
delay for cooling, the UCB will energize the blower
motor.
The call is passed to the unit control board (UCB),
which then determines whether the requested operation is available and, if so, which components to energize.
When the thermostat calls for the second stage of cooling, the low-voltage control circuit from "R" to "Y2" is
completed. Compressor #2, and condenser fan motor
#2, 20T only (if the ambient temperature is above
60ºF), are energized, provided it has not been lockedout.
For gas heating, the UCB monitors the "W1" call but
does not handle the operation of the gas furnace. An
ignition control board controls the gas heater operation.
If there is an initial call for both stages of cooling, the
UCB will delay energizing compressor #2 by 30 seconds in order to avoid a power in rush.
For electric heat units, the UCB passes the call to the
electric heater.
Once the thermostat has been satisfied, it will de-energize Y1 and Y2. If the compressors have satisfied their
minimum run times, the compressors and condenser
fans are de-energized. Otherwise, the unit operates
each cooling system until the minimum run times for
the compressors have been completed. Upon the final
compressor de-energizing, the blower is stopped following the elapse of the fan off delay for cooling.
In both cases, when the "W1" call is sensed, the indoor
air blower is energized following a specified heating
delay.
If at any time a call for both heating and cooling are
present, the heating operation will be performed. If operating, the cooling system is halted as with a completion
of a call for cooling. Heating always takes priority.
COOLING SEQUENCE OF OPERATION
To be available, a compressor must not be locked-out
due to a high or low-pressure switch or freezestat trip
and the anti-short cycle delay (ASCD) must have
elapsed.
CONTINUOUS BLOWER
ECONOMIZER WITH SINGLE ENTHALPY SENSOR -
By setting the room thermostat fan switch to "ON," the
supply air blower will operate continuously.
When the room thermostat calls for "first-stage" cooling, the low voltage control circuit from "R" to "G" and
"Y1" is completed. The UCB energizes the blower
motor (if the fan switch on the room thermostat is set in
the "AUTO" position) and drives the economizer dampers from fully closed to their minimum position. If the
enthalpy of the outdoor air is below the setpoint of the
enthalpy controller (previously determined), "Y1" energizes the economizer. The dampers will modulate to
maintain a constant supply air temperature as monitored by the discharge air sensor. If the outdoor air
enthalpy is above the setpoint, "Y1" energizes compressor #1, condenser fan motor #1, and condenser
fan motor #2, 15T only (if the ambient temperature is
above 60°F).
INTERMITTENT BLOWER
With the room thermostat fan switch set to "AUTO" and
the system switch set to either the "AUTO" or "HEAT"
settings, the blower is energized whenever a cooling or
heating operation is requested. The blower is energized after any specified delay associated with the
operation.
When energized, the indoor blower has a minimum run
time of 30 seconds. Additionally, the indoor blower has
a delay of 10 seconds between operations.
NO OUTDOOR AIR OPTIONS
When the thermostat calls for the first stage of cooling,
the low-voltage control circuit from "R" to "Y1" and "G"
is completed. For first stage cooling, compressor #1,
condenser fan motor #1 and condenser fan motor #2,
44
When the thermostat calls for "second-stage" cooling,
the low voltage control circuit from "R" to "Y2" is
completed. The UCB energizes the first available
compressor if the enthalpy of the outdoor air is below
the setpoint of the enthalpy controller (i.e. first stage
has energized the economizer), "Y2" will energize
Unitary Products Group
129963-YIM-A-0605
compressor circuit #1. If the outdoor air is above the
setpoint, "Y2" will energize compressor circuit #2.
Once the thermostat has been satisfied, it will de-energize Y1 and Y2. If the compressors have satisfied their
minimum run times, the compressors and condenser
fans are de-energized. Otherwise, the unit operates
each cooling system until the minimum run times for
the compressors have been completed. Upon the final
compressor de-energizing, the blower is stopped following the elapse of the fan off delay for cooling, and
the economizer damper goes to the closed position. If
the unit is in continues fan operation the economizer
damper goes to the min. position.
During cooling operation, if a high-pressure limit switch
opens, the UCB will de-energize the associated compressor, initiate the ASCD (Anti-short cycle delay), and,
if the other compressor is idle, stop the condenser
fans. If the call for cooling is still present at the conclusion of the ASCD, the UCB will re-energize the halted
compressor.
Should a high-pressure switch open three times within
two hours of operation, the UCB will lock-out the associated compressor and flash a code (see Table 28). If
the other compressor is inactive, the condenser fans
will be de-energized.
LOW-PRESSURE LIMIT SWITCH
ECONOMIZER WITH DUAL ENTHALPY SENSORS -
The operation with the dual enthalpy sensors is identical to the single sensor except that a second enthalpy
sensor is mounted in the return air. This return air sensor allows the economizer to choose between outdoor
air and return air, whichever has the lowest enthalpy
value, to provide maximum operating efficiency.
ECONOMIZER (SINGLE OR DUAL) WITH POWER
EXHAUST -
This system operates as specified above with one
addition. The power exhaust motor is energized 45
seconds after the actuator position exceeds the
exhaust fan setpoint on the economizer control. When
the power exhaust is operating, the second stage of
mechanical cooling will not operate. As always, the "R"
to "G" connection provides minimum position but does
not provide power exhaust operation.
The low-pressure limit switch is not monitored during
the initial 30 seconds of a cooling system's operation.
For the following 30 seconds, the UCB will monitor the
low-pressure switch to ensure it closes. If the low-pressure switch fails to close after the 30-second monitoring phase, the UCB will de-energize the associated
compressor, initiate the ASCD, and, if the other compressor is idle, stop the condenser fans.
Once the low-pressure switch has been proven (closed
during the 30-second monitor period described above),
the UCB will monitor the low-pressure limit switch for
any openings. If the low-pressure switch opens for
greater than 5 seconds, the UCB will de-energize the
associated compressor, initiate the ASCD, and, if the
other compressor is idle, stop the condenser fans.
If the call for cooling is still present at the conclusion of
the ASCD, the UCB will re-energize the halted compressor.
MOTORIZED OUTDOOR AIR DAMPERS -
This system operation is the same as the units with no
outdoor air options with one exception. When the "R" to
"G" circuit is complete, the motorized damper drives
open to a position set by the thumbwheel on the
damper motor. When the "R" to "G" circuit is opened,
the damper spring returns fully closed.
COOLING OPERATION ERRORS
Each cooling system is monitored for operation outside
of the intended parameters. Errors are handled as
described below. All system errors override minimum
run times for compressors.
HIGH-PRESSURE LIMIT SWITCH
Unitary Products Group
Should a low-pressure switch open three times within
one hour of operation, the UCB will lock-out the associated compressor and flash a code (Table 28). If the
other compressor is inactive, the condenser fans will
be de-energized.
FREEZESTAT
During cooling operation, if a freezestat opens, the
UCB will de-energize the associated compressor, initiate the ASCD, and, if the other compressor is idle,
stop the condenser fans. If the call for cooling is still
present at the conclusion of the ASCD, the UCB will reenergize the halted compressor.
Should a freezestat open three times within two hours
of operation, the UCB will lock-out the associated com-
45
129963-YIM-A-0605
pressor and flash a code (Table 28). If the other compressor is inactive, the condenser fans will be deenergized.
LOW AMBIENT COOLING
To determine when to operate in low ambient mode,
the UCB has a pair of terminals connected to a temperature-activated switch set at 30ºF. When the low ambient switch is closed and the thermostat is calling for
cooling, the UCB will operate in the low ambient mode.
Low ambient mode operates the compressors in this
manner: 10 minutes on, 5 minutes off. The indoor
blower is operated throughout the cycle. The 5-minute
off period is necessary to defrost the indoor coil.
Low ambient mode always begins with compressor
operation. Compressor minimum run time may extend
the minutes of compressor operation. The defrost cycle
will begin immediately following the elapse of the minimum run time.
The other refrigerant system will continue in operation
unless it is affected by the fault as well.
The unit control board monitors the temperature limit
switch of electric heat units and the temperature limit
switch and the gas valve of gas furnace units.
COMPRESSOR PROTECTION
The compressors also have inherent (internal) protection. If there is an abnormal temperature rise in a compressor, the protector will open to shut down the
compressor. The UCB incorporates features to minimize compressor wear and damage. An anti-short
cycle delay (ASCD) is utilized to prevent operation of a
compressor too soon after its previous run. Additionally, a minimum run time is imposed any time a compressor is energized.
The ASCD is initiated on unit start-up and on any compressor reset or lock-out.
FLASH CODES
When operating in low ambient mode, the UCB will not
lockout the compressors due to a freezestat trip. However, a freezestat trip will de-energize the associated
compressor. If the call for cooling is still present at the
end of the ASCD and the freezestat has closed, the
unit will resume operation.
SAFETY CONTROLS
The unit control board monitors the following inputs for
each cooling system:
The UCB will initiate a flash code associated with
errors within the system. Refer to UNIT CONTROL
BOARD FLASH CODES Table 28.
RESET
Remove the call for cooling, by raising thermostat setting higher than the conditioned space temperature.
This resets any pressure or freezestat flash codes.
ELECTRIC HEATING SEQUENCE OF OPERATIONS
1. A suction line freezestat to protect against low
evaporator temperatures due to a low airflow or a
low return air temperature, (opens at 26 ± 5 °F and
resets at 38 ± 5°F).
2. A high-pressure switch to protect against excessive discharge pressures due to a blocked condenser coil or a condenser motor failure, (opens at
380 ± 10 psig and resets at 300 ± 10 psig).
3. A low-pressure switch to protect against loss of
refrigerant charge, (opens at 7 ± 3 psig and resets
at 22 ± 5 psig).
The above pressure switches are hard-soldered to the
unit. The refrigeration systems are independently monitored and controlled. On any fault, only the associated
system will be affected by any safety/preventive action.
46
The following sequence describes the operation of the
electric heat section.
Single-stage heating (applies only to 18 KW heater, all
other heaters MUST use a two-stage thermostat):
a.
Upon a call for heat by the thermostat, the heater
contactor (6M) will be energized. After completing
the specified fan on delay for heating, the UCB will
energize the blower motor.
b.
The thermostat will cycle the electric heat to satisfy
the heating requirements of the conditioned space.
Two-stage heating (applies to all heaters except 18
KW):
a.
Upon a call for first-stage heat by the thermostat, the
heater contactor (6M) (6M & 7M on 72 KW, 240V)
Unitary Products Group
129963-YIM-A-0605
will be energized. After completing the specified fan
on delay for heating, the UCB will energize the
blower motor.
If the second stage of heat is required, heater contactor (7M) will be energized. Note that on the 54
KW, 240V heater, heater contactors (7M & 8M) will
be energized and on the 72 KW, 240V heater,
heater contactors (8M & 9M) will be energized. After
completing the specified fan on delay for heating,
the UCB will energize the blower motor.
b.
The thermostat will cycle the electric heat to satisfy
the heating requirements of the conditioned space.
This control is located inside the heater compartment and is set to open at the temperature indicated in the Limit Control Setting Table 23. It is a
manual reset limit. These limit switches will deenergize the heaters should the primary limit fail to
open or the contactors fail to open in a failure
mode.
TABLE 23: LIMIT CONTROL SETTING
HEATER
kW
TEMPERATURE LIMIT
SWITCH 1, 2
OPENS, ºF
TEMPERATURE LIMIT
SWITCH 3, 4, 5, 6
OPENS, ºF
NOTE: All 240 & 480V heaters are provided with man-
18
120
170
ual reset backup protection limits. These will
de-energize the heaters should the primary
limit fail to open or the contactors fail to open in
a failure mode.
36
120
170
54
120
170
72
120
170
18
140
200
36
140
200
54
140
200
72
140
200
18
120
170
36
120
170
54
120
170
72
120
170
18
120
-
36
120
-
54
120
-
72
120
-
HEATING OPERATION ERRORS
UNIT
(Tons)
VOLTAGE
15
17.5 &
20
240
240
TEMPERATURE LIMIT
If the UCB senses zero volts from the high temperature
limit, the indoor blower motor is immediately energized.
This limit is monitored regardless of unit operation status, i.e. the limit is monitored at all times.
15, 17.5
& 20
15, 17.5
& 20
460
600
If the temperature limit opens three times within one
hour, it will lock-on the indoor blower motor and a flash
code is initiated (See Table 28).
FLASH CODES
SAFETY CONTROLS
The UCB will initiate a flash code associated with
errors within the system. Refer to UNIT CONTROL
BOARD FLASH CODES Table 28.
The unit control board monitors the temperature limit
switch of electric heat units.
The control circuit includes the following safety controls:
1. Temperature Limit Switch (TLS 1, 2).
This control is located inside the heater compartment and is set to open at the temperature indicated in the Limit Control Setting Table 23. It resets
automatically. The limit switch operates when a
high temperature condition, caused by inadequate
supply air flow occurs, thus shutting down the
heater and energizing the blower.
2. Temperature Limit Switch (TLS 3, 4, 5 and 6).
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RESET
Remove the call for heating by lowering the thermostat
setting lower than the conditioned space temperature.
This resets any flash codes.
HEAT ANTICIPATOR SETPOINTS
It is important that the anticipator setpoint be correct.
Too high of a setting will result in longer heat cycles
and a greater temperature swing in the conditioned
space. Reducing the value below the correct setpoint
will give shorter "ON" cycles and may result in the lowering of the temperature within the conditioned space.
Refer to Table 24 for the required heat anticipator setting.
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129963-YIM-A-0605
TABLE 24: ELECTRIC HEAT ANTICIPATOR
SETPOINTS
HEATER
KW
VOLTAGE
SETTING, AMPS
TH1
TH2
18
0.29
-
36
0.29
0.29
54
208/230-3-60
0.29
0.58
72
0.29
0.58
18
0.29
-
36
0.29
0.29
54
460-3-60
0.29
0.29
72
0.29
0.29
18
0.29
-
36
0.29
0.29
0.29
0.29
0.29
0.29
54
72
575-3-60
GAS HEATING SEQUENCE OF OPERATIONS
The following sequence describes the operation of the
gas heat section.
When the thermostat calls for the first stage of heating,
the low-voltage control circuit from "R" to "W1" and "G"
is completed, thru the UCB. The heat relay "RW1" is
energized. The "RW1-2" contacts close energizing the
draft motor control. The draft motor control contacts
close and start the draft motor. As the speed of the
draft motor reaches approximately 2500 RPM, the centrifugal switch contact, located on the end of the draft
motor shaft, closes to power the first stage ignition
module "IC1", thru the "RW1-1 contacts.
Ignition module "IC1" will immediately start the first
stage igniter sparking and will open the redundant
valve located inside the first stage main gas valve
"GV1" to allow a flow of gas to only the first stage carryover tube. Only after the pilot flame has been ignited
and the presence of pilot flame detected at the "IC1" by
a signal sent back through the flame sensor is sparking
terminated and the first stage main gas valve opened.
Gas flows into each of the main burners and is ignited
from the carryover tube flame.
After completing the specified fan on delay for heating,
the UCB will energize the blower motor.
If "IC1" fails to detect a pilot flame, it will continue to try
for a maximum of 85 seconds to ignite the pilot tube. If
the pilot flame is not detected, then "IC1" will lock out
first stage furnace operation for five minutes or until
24V power is removed from the module either at the
unit or by resetting the room thermostat.
48
When the thermostat calls for the second stage of
heating, the low-voltage control circuit from "R" to "W2"
is completed, thru the UCB. Heat relay "RW2" is energized. The "RW2-1" contact is closed energizing the
second stage ignition module "IC2". "IC2" will immediately start the second stage igniter sparking and will
open the redundant valve located inside the second
stage main gas valve "GV2" to allow a flow of gas to
the second stage carryover tube. Only after the pilot
flame has been ignited and the presence of pilot flame
detected at "IC2" by a signal sent back through the
flame sensor is sparking terminated and the main gas
valve opened.
Gas flows into each of the second stage main burners
and is ignited from the carryover tube flame.
If "IC2" fails to detect a pilot flame, it will continue to try
for a maximum of 85 seconds to ignite the pilot tube. If
the pilot flame is not detected, then "IC2" will lock out
first stage furnace operation for five minutes or until
24V power is removed from the module either at the
unit or by resetting the room thermostat.
NOTE: That the second stage furnace can operate
even if first stage has locked out.
When the thermostat satisfies de-energizing the
"RW2"and "RW1", thus opening all gas valves. The
blower motor will continue to run after the furnace is
shut down until the specified fan off delay for heating
has been satisfied. The UCB will de-energize the
blower motor.
REDUNDANT
VALVE
MAIN VALVE
GAS MAIN
GAS
VALVE
TO MAIN
BURNER
TO PILOT BURNER
FIGURE 17 - GAS VALVE PIPING
When the thermostat calls for the first stage of heating,
the low-voltage control circuit from "R" to "W1" is completed. A call for heat passes through the UCB to the
ignition control board (ICB). The UCB monitors the
"W1" call and acts upon any call for heat. Once voltage
has been sensed at “W1”, the UCB will initiate the fan
on delay for heating, energizing the indoor blower after
the specified delay has elapsed.
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129963-YIM-A-0605
When the thermostat has been satisfied, heating calls
are ceased. The GV is immediately de-energized. The
blower is de-energized after the fan off delay for heating has elapsed. The draft motor performs a 25-second
post purge.
GAS HEATING OPERATION ERRORS
down the ignition control and closing the main gas
valves and energizing the blower.
2. Centrifugal Switch (CS).
If the draft motor should fail, the centrifugal switch
attached to the shaft of the motor prevents the ignition controls and gas valves from being energized.
TEMPERATURE LIMIT
If the UCB senses zero volts from the high temperature
limit, the indoor blower motor is immediately energized.
When the UCB again senses 24 volts from the temperature limit, the draft motor will perform a 25-second
post-purge and the indoor blower will be de-energized
following the elapse of the fan off delay for heating.
This limit is monitored regardless of unit operation status, i.e. the limit is monitored at all times.
If the temperature limit opens three times within one
hour, it will lock-on the indoor blower motor and a flash
code is initiated (See Table 28).
GAS VALVE
The UCB continuously monitors the GV. Any time the
UCB senses voltage at the GV without a call for heat
for a continuous five-minute period, the UCB will lockon the indoor blower and a flash code is initiated
(Table 28). When voltage is no longer sensed at the
GV, the UCB will de-energize the indoor blower following the elapse of the fan off delay for heating.
If voltage has been sensed at the GV for at least 15
seconds during the fan on delay for heating and GV
voltage or "W1" is lost, the indoor blower is forced on
for the length of the fan off delay for heating.
SAFETY CONTROLS
The unit control board monitors the temperature limit
switch and the gas valve of gas furnace units.
The control circuit includes the following safety controls:
3. Redundant Gas Valve.
There are two separate gas valves in the furnace.
Each valve contains a main and a redundant valve.
The redundant valves are located upstream of the
main gas valves. Should either or both of the main
gas valves fail in the open position the redundant
valves serve as back-ups and shut off the flow of
gas.
4. Flame Sensor Rod / 100% Ignition Control LockOut.
The flame rods and controls are located per Proper
Flame Adjustment Figure 20. If an ignition control
fails to detect a signal from the flame sensor indicating the pilot flame is properly ignited, then the
main gas valve will not open. It will continue to try
and ignite the pilot for a maximum of 85 seconds,
then if the pilot flame is not detected, the ignition
control will lock out furnace operation until 24V
power is removed from the module either at the
unit or by resetting the room thermostat.
5. Rollout Switch.
This switch is located above the main burners in
the control compartment, which in the event of a
sustained main burner rollout shuts off and locks
out both ignition controls closing both gas valves.
The ignition controls lock out furnace operation
until 24V power is removed from the controls either
at the unit or by resetting the room thermostat.
NOTE: The auto reset rollout switch must reset before
allowing furnace operation.
1. Limit Control (LS).
6. Auxiliary limit switch (AUX) This control is located inside the heat exchanger
compartment and is set to open at the temperature
indicated in the Limit Control Setting Table 25. It
resets automatically. The limit switch operates
when a high temperature condition, caused by
inadequate supply air flow occurs, thus shutting
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This control is located inside the heat exchanger
compartment and is set to open at 190°F. It is a
manual reset switch. If AUX trips, then the primary
limit has not functioned correctly. Replace the primary limit.
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129963-YIM-A-0605
START-UP (COOLING)
TABLE 25: LIMIT CONTROL SETTING
Capacity, MBH
Units
(Tons)
Input
Output
Limit Control
Opens, ºF
15, 17.5 & 20
300
240
195
15, 17.5 & 20
400
320
195
PRESTART CHECK LIST
After installation has been completed:
1. Check the electrical supply voltage being supplied.
Be sure that it is the same as listed on the unit
nameplate.
2. Set the room thermostat to the off position.
IG N . C O N T R O L # 2
3. Turn unit electrical power on.
IG N . C O N T R O L # 1
4. Set the room thermostat fan switch to on.
5. Check indoor blower rotation.
R O L L O U T S W .
G V 1
G A S
V A L V E
S E N S O R # 1
G V 2
G A S
V A L V E
IG N IT O R # 1
If blower rotation is in the wrong direction.
Refer to Phasing Section in general information section.
•
Check blower drive belt tension.
6. Check the unit supply air (CFM). See "CHECKING
SUPPLY AIR CFM" on Page 42.
S E N S O R # 2
IG N IT O R # 2
•
7. Measure evaporator fan motor's amp draw.
B U R N E R C O M P A R T M E N T
FIGURE 18 - GAS VALVE AND CONTROLS
8. Set the room thermostat fan switch to off.
9. Turn unit electrical power off.
FLASH CODES
The UCB will initiate a flash code associated with
errors within the system. Refer to UNIT CONTROL
BOARD FLASH CODES Table 28.
OPERATING INSTRUCTIONS
RESETS
2. Set the room thermostat setting to lower than the
room temperature.
Remove the call for heating by lowering the thermostat
setting lower than the conditioned space temperature.
This resets any flash codes.
3. First stage compressors will energize after the
built-in time delay (five minutes).
HEAT ANTICIPATOR SETPOINTS
It is important that the anticipator setpoint be correct.
Too high of a setting will result in longer heat cycles
and a greater temperature swing in the conditioned
space. Reducing the value below the correct setpoint
will give shorter "ON" cycles and may result in the lowering of the temperature within the conditioned space.
1. Turn unit electrical power on.
4. The second stage of the thermostat will energize
second stage compressor if needed.
POST START CHECK LIST
1. Verify proper system pressures for both circuits.
2. Measure the temperature drop across the evaporator coil.
TABLE 26: GAS HEAT ANTICIPATOR SETPOINTS
Gas Valve
Honeywell VR8440
White-Rodgers 36C68
50
Anticipator Setpoint
1st Stage
2nd Stage
0.30 amp
0.11 amp
3. Measure the system Amperage draw across all
legs of 3 phase power wires.
4. Measure the condenser fan amp draw.
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129963-YIM-A-0605
SHUT DOWN
1. Check for gas leaks in the unit piping as well as the
supply piping.
1. Set the thermostat to highest temperature setting.
2. Turn off the electrical power to the unit.
START-UP (GAS HEAT)
PRE-START CHECK LIST
Complete the following checks before starting the unit.
1. Check the type of gas being supplied. Be sure that
it is the same as listed on the unit nameplate.
2. Make sure that the vent and combustion air hoods
have been properly installed.
OPERATING INSTRUCTIONS
FIRE OR EXPLOSION HAZARD
FAILURE TO FOLLOW THE SAFETY WARNING EXACTLY COULD RESULT IN SERIOUS
INJURY, DEATH OR PROPERTY DAMAGE.
NEVER TEST FOR GAS LEAKS WITH AN
OPEN FLAME. USE A COMMERICALLY
AVAILABLE SOAP SOLUTION MADE SPECIFICALLY FOR THE DETECTION OF
LEAKS TO CHECK ALL CONNECTIONS. A
FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL
INJURY OR LOSS OF LIFE.
2. Check for correct manifold gas pressures. See
“Checking Gas Input” Page 52.
This furnace is equipped with an intermittent
pilot and automatic re-ignition system. DO
NOT attempt to manually light the pilot.
TO LIGHT PILOT AND MAIN BURNERS:
1. Turn “off” electric power to unit.
2. Turn room thermostat to lowest setting.
3. Turn gas valve knob or switch to “on” position.
3. Check the supply gas pressure. It must be within
the limits shown on rating nameplate. Supply
pressure should be checked with all gas
appliances in the building at full fire. At no time
should the standby gas line pressure exceed 13",
nor the operating pressure drop below 5.0" for
natural gas units. If gas pressure is outside these
limits, contact the local gas utility for corrective
action.
4. Turn “on” electric power to unit.
5. Set room thermostat to desired temperature.
(If thermostat “set” temperature is above room temperature, pilot burner ignition will occur and, after
an interval to prove pilot flame, main burners will
ignite).
TO SHUT DOWN:
1. Turn “off” electric power to unit.
2. Depress knob of gas valve while turning to “off”
position, or turn gas valve switch to “off” position.
POST-START CHECK LIST (GAS)
After the entire control circuit has been energized and
the heating section is operating, make the following
checks:
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FIGURE 19 - TYPICAL GAS VALVES
MANIFOLD GAS PRESSURE ADJUSTMENT
Small adjustments to the high-fire gas flow may be
made by turning the pressure regulator adjusting screw
on the automatic gas valve.
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129963-YIM-A-0605
Adjust as follows:
1. Remove the cap on the regulator. It's located next
to the push-on electrical terminals.
4. Disconnect wiring to the gas valves and spark ignitors. Remove the manifold-burner gas valve
assembly by lifting up and pulling back.
2. To decrease the gas pressure, turn the adjusting
screw counterclockwise.
3. To increase the gas pressure, turn the adjusting
screw clockwise.
NOTE: The correct manifold pressure for these fur-
naces is 3.65 IWG ±0.3.
FIGURE 21 - TYPICAL FLAME APPEARANCE
B U R N E R A S S E M B L Y B R A C K E T
F L A M E S E N S O R B U L B
Burners are now accessible for service.
Reverse the above procedure to replace the assemblies. Make sure that burners are level and seat at the
rear of the heat exchanger.
BURNER AIR SHUTTER ADJUSTMENT
1 /8 " G A P B E T W E E N C A R R Y -O V E R
T U B E A N D F L A M E S E N S O R B U L B
C A R R Y -O V E R T U B E
FIGURE 20 - PROPER FLAME ADJUSTMENT
PILOT CHECKOUT
The pilot flame should envelope the end of the flame
sensor. To adjust pilot flame, (1) remove pilot adjustment cover screw, (2) increase or decrease the clearance for air to the desired level, (3) be sure to replace
cover screw after adjustment to prevent possible gas
leakage.
Put the system into operation and observe through
complete cycle to be sure all controls function properly.
BURNER INSTRUCTIONS
Adjust burner shutters so no yellow flame is observed
in the heat exchanger tubes.
CHECKING GAS INPUT
NATURAL GAS
1. Turn off all other gas appliances connected to the
gas meter.
2. With the furnace turned on, measure the time
needed for one revolution of the hand on the smallest dial on the meter. A typical gas meter usually
has a 1/2 or a 1 cubic foot test dial.
3. Using the number of seconds for each revolution
and the size of the test dial increment, find the
cubic feet of gas consumed per hour from the Gas
Rate - Cubic Feet Per Hour Table 27.
To check or change burners, pilot or orifices, CLOSE
MAIN MANUAL SHUT-OFF VALVE AND SHUT OFF
ALL ELECTRIC POWER TO THE UNIT.
If the actual input is not within 5% of the furnace rating
(with allowance being made for the permissible range
of the regulator setting), replace the orifice spuds with
spuds of the proper size.
1. Remove the screws holding either end of the manifold to the burner supports.
NOTE: To find the Btu input, multiply the number of
2. Open the union fitting in the gas supply line just
upstream of the unit gas valve and downstream
from the main manual shut-off valve.
cubic feet of gas consumed per hour by the
Btu content of the gas in your particular locality
(contact your gas company for this information
- it varies widely from city to city.)
3. Remove the gas piping closure panel.
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Unitary Products Group
129963-YIM-A-0605
TABLE 27: GAS RATE - CUBIC FEET PER HOUR
Seconds
for One
Rev.
4
6
8
10
12
14
16
18
20
22
24
26
28
Size of Test Dial
1/2 cu. ft.
1 cu. ft.
450
300
228
180
150
129
113
100
90
82
75
69
64
900
600
450
360
300
257
225
200
180
164
150
138
129
Example: By actual measurement, it takes 13 seconds for the hand on the 1cubic foot dial to make a revolution with just a 300,000 Btuh furnace running.
Read across to the column in the table above, headed “1 Cubic Foot”, where
you will see that 278 cubic feet of gas per hour are consumed by the furnace at
that rate. Multiply 278 x 1050 (the Btu rating of the gas obtained from the local
gas company). The result is 292,425 Btuh, which is close to the 300,000 Btuh
rating of the furnace.
TROUBLESHOOTING
COOLING TROUBLESHOOTING GUIDE
Troubleshooting of components may require
opening the electrical control box with the
power connected to the unit. Use extreme
care when working with live circuits! Check
the unit nameplate for the correct line voltage
and set the voltmeter to the correct range
before making any connections with line terminals.
When not necessary, shut off all electric power
to the unit prior to any of the following maintenance procedures so as to prevent personal
injury.
ADJUSTMENT OF TEMPERATURE RISE
The temperature rise (or temperature difference
between the return air and the heated air from the furnace) must lie within the range shown on the rating
plate and the data in the Gas Heat Application Table 4.
CFM =
Btuh Input x 0.8
108
. x oF Temp. Rise
After the temperature rise has been determined, the
cfm can be calculated as follows:
After about 20 minutes of operation, determine the furnace temperature rise. Take readings of both the return
air and the heated air in the ducts (about six feet from
the furnace) where they will not be affected by radiant
heat. Increase the blower cfm to decrease the temperature rise; decrease the blower cfm to increase the
rise. Refer to the Blower Motor and Drive Data
Table 22.
BELT DRIVE BLOWER
All units have belt drive single-speed blower motors.
The variable pitch pulley on the blower motor can be
adjusted to obtain the desired supply air CFM.
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Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation, which
could cause injury to person and/or damage
unit components. Verify proper operation after
servicing.
On calls for cooling, if the compressors are operating
but the supply air blower motor does not energize after
a short delay (the room thermostat fan switch is in the
“AUTO” position).
1. Turn the thermostat fan switch to the ON position.
If the supply air blower motor does not energize, go
to Step 3.
2. If the blower motor runs with the fan switch in the
ON position but will not run after the first compressor has energized when the fan switch is in the
AUTO position, check the room thermostat for contact between R and G in the AUTO position during
calls for cooling.
3. If the supply air blower motor does not energize
when the fan switch is set to ON, check that line
voltage is being supplied to the contacts of the M3,
contactor, and that the contactor is pulled in. Check
for loose wiring between the contactor and the supply air blower motor.
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129963-YIM-A-0605
4. If M3 is pulled in and voltage is supplied to M3,
lightly touch the supply air blower motor housing. If
it is hot, the motor may be off on internal protection. Cancel any thermostat calls and set the fan
switch to AUTO. Wait for the internal overload to
reset. Test again when cool.
5. If M3 is not pulled in, check for 24 volts at the M3
coil. If 24 volts are present at M3 but M3 is not
pulled in, replace the contactor.
6. Failing the above, if there is line voltage supplied at
M3, M3 is pulled in, and the supply air blower
motor still does not operate, replace the motor.
7. If 24 volts is not present at M3, check that 24 volts
is present at the UCB supply air blower motor terminal, “FAN”. If 24 volts is present at the FAN,
check for loose wiring between the UCB and M3.
8. If 24 volts is not present at the “FAN” terminal,
check for 24 volts from the room thermostat. If 24
volts are not present from the room thermostat,
check for the following:
a.
Proper operation of the room thermostat (contact
between R and G with the fan switch in the ON position and in the AUTO position during operation
calls).
b.
Proper wiring between the room thermostat and the
UCB.
c.
Loose wiring from the room thermostat to the UCB.
9. If 24 volts is present at the room thermostat but not
at the UCB, check for proper wiring between the
thermostat and the UCB, i.e. that the thermostat G
terminal is connected to the G terminal of the UCB,
and for loose wiring.
10. If the thermostat and UCB are properly wired,
replace the UCB.
On calls for cooling, the supply air blower motor is
operating but compressor #1 is not (the room thermostat fan switch is in the “AUTO” position).
1. If installed, check the position of the economizer
blades. If the blades are open, the economizer is
providing free cooling and the compressors will not
immediately operate. If both stages of cooling are
requested simultaneously and the economizer provides free cooling, following a short delay compressor #1 will be energized unless it is locked out. If
compressor #1 is locked out, compressor #2 is
energized. Compressor #2 is always energized in
place of compressor #1 when compressor #1 is
requested but locked out.
2. If no economizer is installed or the economizer is
not opening to provide free cooling and compressor #1 does not energize on a call for cooling,
check for line voltage at the compressor contactor,
M1, and that the contactor is pulled in. Check for
loose wiring between the contactor and the compressor.
3. If M1 is pulled in and voltage is supplied at M1,
lightly touch the compressor housing. If it is hot, the
compressor may be off on inherent protection.
Cancel any calls for cooling and wait for the internal overload to reset. Test again when cool.
4. If M1 is not pulled in, check for 24 volts at the M1
coil. If 24 volts are present and M1 is not pulled in,
replace the contactor.
5. Failing the above, if voltage is supplied at M1, M1
is pulled in, and the compressor still does not operate, replace the compressor.
6. If 24 volts is not present at M1, check for 24 volts at
the UCB terminal, C1. If 24 volts is present, check
for loose wiring between C1 and the compressor
contactor.
7. If 24 volts is not present at the C1 terminal, check
for 24 volts from the room thermostat at the UCB
Y1 terminal. If 24 volts is not present from the room
thermostat, check for the following:
a.
24 volts at the thermostat Y1 terminal.
b.
Proper wiring between the room thermostat and the
UCB, i.e. Y1 to Y1, Y2 to Y2.
c.
Loose wiring from the room thermostat to the UCB.
8. If 24 volts is present at the UCB Y1 terminal, the
compressor may be out due to an open high-pressure switch, low-pressure switch, or freezestat.
Check for 24 volts at the HPS1, LPS1, and FS1
terminals of the UCB. If a switch has opened, there
should be a voltage potential between the UCB terminals, e.g. if LPS1 has opened, there will be a 24volt potential between the LPS1 terminals.
9. If 24 volts is present at the UCB Y1 terminal and
none of the protection switches have opened, the
UCB may have locked out the compressor for
repeat trips. The UCB should be flashing an alarm
code. If not, press and release the ALARMS button
on the UCB. The UCB will flash the last five alarms
on the LED. If the compressor is locked out, cancel
any call for cooling. This will reset any compressor
lock outs.
NOTE: While the above step will reset any lockouts,
compressor #1 may be held off for the ASCD.
See the next step.
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Unitary Products Group
129963-YIM-A-0605
10. If 24 volts is present at the UCB Y1 terminal and
none of the switches are open and the compressor
is not locked out, the UCB may have the compressor in an ASCD. Check the LED for an indication of
an ASCD cycle. The ASCD should time out within
5 minutes. Press and release the TEST button to
reset all ASCDs.
16. If none of the above correct the error, replace the
UCB.
11. If 24 volts is present at the UCB Y1 terminal and
the compressor is not out due to a protective
switch trip, repeat trip lock out, or ASCD, the economizer terminals of the UCB may be improperly
wired. Check for 24 volts at the Y1 “OUT” terminal
of the UCB. If 24 volts is present, trace the wiring
from Y1 “OUT” for incorrect wiring. If 24 volts is not
present at the Y1 “OUT” terminal, the UCB must be
replaced.
1. If installed, check the position of the economizer
blades. If the blades are open, the economizer is
providing free cooling. If the second stage of
cooling is requested, following a short delay,
compressor #1 will be energized unless it is locked
out. Typically, compressor #2 is energized only
during free cooling if the call for the second stage
of cooling persists for 20 minutes.
12. For units without economizers:If 24 volts is present
at the Y1 OUT terminal, check for 24 volts at the
Y1 “ECON” terminal. If 24 volts is not present,
check for loose wiring from the Y1 “OUT” terminal
to the Mate-N-Lock plug, the jumper in the Mate-NLock plug, and in the wiring from the Mate-N-Lock
plug to the Y1 “ECON” terminal.
13. For units with economizers: If 24 volts is present at
the Y1 “OUT” terminal, check for 24 volts at the Y1
“ECON” terminal. If 24 volts is not present, check
for loose wiring from the Y1 “OUT” terminal to the
Mate-N-Lock plug, a poor connection between the
UCB and economizer Mate-N-Lock plugs, loose
wiring from the Mate-N-Lock plug to the economizer, back to the Mate-N-Lock plug, and from the
Mate-N-Lock plug to the Y1 “ECON” terminal. If
nothing is found, the economizer DME may have
faulted and is failing to return the 24-volt “call” to
the Y1 “ECON” terminal even though the economizer is not providing free cooling. To test, disconnect the Mate-N-Locks and jumper between the
WHITE and YELLOW wires of the UCB’s Mate-NLock plug. If compressor #1 energizes, there is a
fault in the economizer wiring or DME.
14. The UCB can be programmed to lock out compressor operation during free cooling and in low ambient conditions. These options are not enabled by
default. Local distributors can test the UCB for this
programming.
15. If none of the above corrected the error, test the
integrity of the UCB. Disconnect the C1 terminal
wire and jumper it to the Y1 terminal. DO NOT
jump the Y1 to C1 terminals. If the compressor
engages, the UCB has faulted.
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On calls for the second stage of cooling, the supply air
blower motor and compressor #1 are operating but
compressor #2 is not (the room thermostat fan switch
is in the “AUTO” position).
2. Compressor #2 will not energize simultaneously
with compressor #1 if a call for both stages of cooling is received. The UCB delays compressor #2 by
30 seconds to prevent a power surge. If after the
delay compressor #2 does not energize on a second stage call for cooling, check for line voltage at
the compressor contactor, M2, and that the contactor is pulled in. Check for loose wiring between the
contactor and the compressor.
3. If M2 is pulled in and voltage is supplied at M2,
lightly touch the compressor housing. If it is hot, the
compressor may be off on inherent protection.
Cancel any calls for cooling and wait for the internal overload to reset. Test again when cool.
4. If M2 is not pulled in, check for 24 volts at the M2
coil. If 24 volts is present and M2 is not pulled in,
replace the contactor.
5. Failing the above, if voltage is supplied at M2, M2
is pulled in, and the compressor still does not operate, replace the compressor.
6. If 24 volts is not present at M2, check for 24 volts at
the UCB terminal, C2. If 24 volts are present,
check for loose wiring between C2 and the compressor contactor.
7. If 24 volts is not present at the C2 terminal, check
for 24 volts from the room thermostat at the UCB
Y2 terminal. If 24 volts is not present from the room
thermostat, check for the following:
a.
24 volts at the thermostat Y2 terminal.
b.
Proper wiring between the room thermostat and the
UCB, i.e. Y1 to Y1, Y2 to Y2.
c.
Loose wiring from the room thermostat to the UCB.
55
129963-YIM-A-0605
8. If 24 volts is present at the UCB Y2 terminal, the
compressor may be out due to an open high-pressure switch, low-pressure switch, or freezestat.
Check for 24 volts at the HPS2, LPS2, and FS2
terminals of the UCB. If a switch has opened, there
should be a voltage potential between the UCB terminals, e.g. if LPS2 has opened, there will be 24
volts of potential between the LPS2 terminals.
9. If 24 volts is present at the UCB Y2 terminal and
none of the protection switches have opened, the
UCB may have locked out the compressor for
repeat trips. The UCB should be flashing a code. If
not, press and release the ALARMS button on the
UCB. The UCB will flash the last five alarms on the
LED. If the compressor is locked out, remove any
call for cooling at the thermostat or by disconnecting the thermostat wiring at the Y2 UCB terminal.
This will reset any compressor lock outs.
NOTE: While the above step will reset any lock outs,
compressor #1 will be held off for the ASCD,
and compressor #2 may be held off for a portion of the ASCD. See the next step.
10. If 24 volts is present at the UCB Y2 terminal and
none of the switches are open and the compressor
is not locked out, the UCB may have the compressor in an ASCD. Check the LED for an indication of
an ASCD cycle. The ASCD should time out within
5 minutes. Press and release the TEST button to
reset all ASCDs.
11. The UCB can be programmed to lock out compressor operation during free cooling and in low ambient conditions. These options are not enabled by
default. Local distributors can test the UCB for this
programming.
12. If none of the above corrected the error, test the
integrity of the UGB. Disconnect the C2 terminal
wire and jumper it to the Y2 terminal. DO NOT
jump the Y2 to C2 terminals. If the compressor
engages, the UCB has faulted.
13. If none of the above correct the error, replace the
UCB.
On a call for cooling, the supply air blower motor and
compressor #2 are operating but compressor #1 is not
(the room thermostat fan switch is in the “AUTO” position).
1. Compressor #2 is energized in place of compressor #1 when compressor #1 is unavailable for cooling calls. Check the UCB for alarms indicating that
56
compressor #1 is locked out. Press and release
the ALARMS button if the LED is not flashing an
alarm.
2. Check for line voltage at the compressor contactor,
M1, and that the contactor is pulled in. Check for
loose wiring between the contactor and the compressor.
3. If M1 is pulled in and voltage is supplied at M1,
lightly touch the compressor housing. If it is hot, the
compressor may be off on inherent protection.
Cancel any calls for cooling and wait for the internal overload to reset. Test again when cool.
4. If M1 is not pulled in, check for 24 volts at the M1
coil. If 24 volts is present and M1 is not pulled in,
replace the contactor.
5. Failing the above, if voltage is supplied at M1, M1
is pulled in, and the compressor still does not operate, replace the compressor.
6. If 24 volts is not present at M1, check for 24 volts at
the UCB terminal, C1. If 24 volts is present, check
for loose wiring between C1 and the compressor
contactor.
7. If 24 volts is not present at the C1 terminal, check
for 24 volts from the room thermostat at the UCB
Y1 terminal. If 24 volts are not present at the UCB
Y1 terminal, the UCB may have faulted. Check for
24 volts at the Y1 ECON terminal. If 24 volts is not
present at Y1 “ECON”, the UCB has faulted. The
UCB should de-energize all compressors on a loss
of call for the first stage of cooling, i.e. a loss if 24
volts at the Y1 terminal.
8. If 24 volts are present at the UCB Y1 terminal, the
compressor may be out due to an open high-pressure switch, low-pressure switch, or freezestat.
Check for 24 volts at the HPS1, LPS1, and FS1
terminals of the UCB. If a switch has opened, there
should be a voltage potential between the UCB terminals, e.g. if LPS1 has opened, there will be a 24volt potential between the LPS1 terminals.
9. If 24 volts is present at the UCB Y1 terminal and
none of the protection switches have opened, the
UCB may have locked out the compressor for
repeat trips. The UCB should be flashing a code. If
not, press and release the ALARMS button on the
UCB. The UCB will flash the last five alarms on the
LED. If the compressor is locked out, remove any
call for cooling. This will reset any compressor lock
outs.
Unitary Products Group
129963-YIM-A-0605
NOTE: While the above step will reset any lock outs,
compressor #2 will be held off for the ASCD,
and compressor #1 may be held off for a portion of the ASCD. See the next step.
10. If 24 volts is present at the UCB Y1 terminal and
none of the switches are open and the compressor
is not locked out, the UCB may have the compressor in an ASCD. Check the LED for an indication of
an ASCD cycle. The ASCD should time out within
5 minutes. Press and release the TEST button to
reset all ASCDs.
11. If 24 volts is present at the UCB Y1 terminal and
the compressor is not out due to a protective
switch trip, repeat trip lock out, or ASCD, the economizer terminals of the UCB may be improperly
wired. Check for 24 volts at the Y1 “OUT” terminal
of the UCB. If 24 volts is present, trace the wiring
from Y1 “OUT” for incorrect wiring. If 24 volts is not
present at the Y1 “OUT” terminal, the UCB must be
replaced.
12. For units without economizers: If 24 volts is present
at the Y1 “OUT” terminal, check for 24 volts at the
Y1 “ECON” terminal. If 24 volts is not present,
check for loose wiring from the Y1 “OUT” terminal
to the Mate-N-Lock plug, the jumper in the Mate-NLock plug, and in the wiring from the Mate-N-Lock
plug to the Y1 “ECON” terminal.
For units with economizers: If 24 volts is present at
the Y1 “OUT” terminal, check for 24 volts at the Y1
“ECON” terminal. If 24 volts is not present, check
for loose wiring from the Y1 “OUT” terminal to the
Mate-N-Lock plug, a poor connection between the
UCB and economizer Mate-N-Lock plugs, loose
wiring from the Mate-N-Lock plug to the
economizer, back to the Mate-N-Lock plug, and
from the Mate-N-Lock plug to the Y1 “ECON”
terminal. The economizer board may have faulted
and is not returning the 24 volts to the Y1 “ECON”
terminal even though the economizer is not
providing free cooling. To test the economizer
board, disconnect the Mate-N-Locks and jumper
between the WHITE and YELLOW wires of the
UCB’s Mate-N-Lock plug.
13. The UCB can be programmed to lock out compressor operation during free cooling and in low ambient conditions. These options are not enabled by
default. They can be checked by local distributors.
Unitary Products Group
14. If none of the above corrected the error, test the
integrity of the UCB. Disconnect the C1 terminal
wire and jumper it to the Y1 terminal. DO NOT
jump the Y1 to C1 terminals. If the compressor
engages, the UCB has faulted.
15. If none of the above correct the error, replace the
UCB.
GAS HEAT TROUBLESHOOTING GUIDE
Troubleshooting of components may require
opening the electrical control box with the
power connected to the unit. Use extreme
care when working with live circuits! Check
the unit nameplate for the correct line voltage
and set the voltmeter to the correct range
before making any connections with line terminals.
When not necessary, shut off all electric power
to the unit prior to any of the following maintenance procedures so as to prevent personal
injury.
Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation, which
could cause injury to person and/or damage
unit components. Verify proper operation after
servicing.
NOTE: To find the Btu input, multiply the number of
cubic feet of gas consumed per hour by the
Btu content of the gas in your particular locality
(contact your gas company for this information
- it varies widely from city to city.).
On calls for heating, the draft motor operates and the
furnace lights but the supply air blower motor does not
energize after a short delay (the room thermostat fan
switch is in “AUTO” position).
1. Place the thermostat fan switch in the “ON” position. If the supply air blower motor energizes, go to
Step 9.
57
129963-YIM-A-0605
thermostat and the UCB, i.e. that the thermostat G
terminal is connected to the G terminal of the UCB,
and for loose wiring.
The furnace may shut down on a high temperature condition during the procedure. If
this occurs, the UCB energize the supply air
blower motor until the high temperature limit
has reset. Caution should be used at all
times as the supply air blower may energize
regardless of the room thermostat fan switch
position.
2. If the supply air blower motor does not energize
when the fan switch is set to “ON,” check that line
voltage is being supplied to the contacts of the M3
contactor, and that the contactor is pulled in. Check
for loose wiring between the contactor and the supply air blower motor.
3. If M3 is pulled in and voltage is supplied at M3,
lightly touch the supply air blower motor housing. If
it is hot, the motor may be off on inherent protection. Cancel any thermostat calls and set the fan
switch to “AUTO”, wait for the internal overload to
reset. Test again when cool.
8. If the thermostat and UCB are properly wired,
replace the UCB.
9. If the blower motor runs with the fan switch in the
“ON” position but does not run shortly after the furnace has ignited when the fan switch is in the
“AUTO” position, check the room thermostat for
contact between R and G during “W1” calls.
On calls for heating, the supply air blower operates but
the draft motor does not (the room thermostat fan
switch is in the “AUTO” position).
1. The draft motor has inherent protection. If the
motor shell is hot to the touch, wait for the internal
overload to reset.
2. If the motor shell is cold with the room thermostat
calling for heat, check for line voltage at the
motor's Mate-N-Lok connector attached to the
evaporator partition. If line voltage is present,
replace the draft motor.
4. If M3 is not pulled in, check for 24 volts at the M3
coil. If 24 volts is present at M3 but M3 is not pulled
in, replace the contactor.
3. If line voltage is not present, check for line voltage
at the heat relay (RW1) contacts in the main control box and check to see if the (RW1) is pulled in.
5. Failing the above, if there is line voltage supplied at
M3, M3 is pulled in, and the supply air blower
motor still does not operate, replace the motor.
4. If the (RW1) relay is pulled in, check for a loose line
voltage connection.
6. If 24 volts is not present at M3, check that 24 volts
is present at the supply air blower motor terminal
on the UCB. If 24 volts is present at the UCB terminal, check for loose wiring between the UCB and
M3. If 24 volts is not present at the UCB supply air
blower motor terminal, check for 24 volts from the
room thermostat. If 24 volts is not present from the
room thermostat, check for the following:
a.
Proper operation of the room thermostat (contact
between R and G with the fan switch in the “ON”
position and in the “AUTO” position during operation
calls).
b.
Proper wiring between the room thermostat and the
UCB.
c.
Loose wiring from the room thermostat to the UCB.
7. If 24 volts is present at the room thermostat but not
at the UCB, check for proper wiring between the
58
5. If the (RW1) relay is not pulled in, check for 24 volts
at the (RW1) coil. If 24 volts is present, replace the
(RW1) relay. If 24 volts is not present, check for a
loose 24 volt connection back to the relay board
and check the connections from the room thermostat to the relay board. If all connections are correct, replace the relay board.
The draft motor runs but the furnace does not light and
the sparker does not spark.
1. The ignition control (IC1, IC2) may be locked out
due to either a flame roll out or 100% shut off.
These safety features are described above. If lockout has occurred, 24V must be removed from the
ignition controls. This is done at the unit or by
resetting the room thermostat. After resetting 24V,
check for proper furnace operation. If lock-out continues to occur, locate the source of the problem
and correct.
Unitary Products Group
129963-YIM-A-0605
2. Check all 24 volt connections from the relay board
to and in the gas heat section. Check low voltage
connections to the (ETD) located in the control
box.
3. If the furnace is hot, it may be out on an over-temperature condition, wait for limit reset.
4. If the furnace is cold, check for 24 volts at wire 241
attached to the electrical time delay (ETD) located
in the main control box. If 24 volts is not found,
replace the ETD.
5. 24 volts is found at wire 241, remove the wires
attached to the (TDR) and with a VOM, check for
continuity across contacts 1 and 2. If none is found,
the (TDR) is open and must be replaced. If there is
continuity, re-attach the wires.With the draft motor
running, check for 24 volts at terminal 4 of (RW1-2)
and (RW2-1). If 24 volts is not present, the centrifugal switch (CS) has not closed or has gone bad.
Check the line voltage to the unit - if it is correct,
replace the draft motor. If line voltage is low, call
the power company.
2. Check all wiring between the ignitor control and the
gas valve. Check to make sure the ground connections are intact.
3. If the wiring is intact, check for 24 volts across terminals “PV” and “COMMON” on the ignitor control.
If 24 volts is not present, replace the ignitor control.
4. If 24 volts is present, remove the pilot burner and
remove the pilot orifice from the pilot burner. The
orifice is removed in the direction opposite the flow
of gas. Inspect the orifice for obstruction. If it is
clear, replace the main gas valve.
The ignitor sparks at the pilot burner but the pilot does
not ignite and a gas odor is detected at the draft motor
outlet.
1. Adjust the pilot adjust screw on the gas valve as
described in “PILOT CHECKOUT” Page 52.
2. Check the supply pressure as described in “POST
START CHECK LIST” Page 51. Make adjustments
as necessary.
6. Check for 24V at terminal 2 of (RW1-2 and RW21). If 24V is not present, check for 24V at (RW1
and RW2) relay coils. If these relays are pulled in,
then check for a loose connection at terminal 2 and
terminal 4 of each relay. If no problem is found,
then replace (RW1 and/or RW2) as required.
3. Check the pilot orifice for obstruction as described
in paragraph above. Clean as needed but the problem should not be the gas valve.
7. If 24 volts is present at the ignitor controls, check
all control wiring at the ignitor controls and the high
tension wire to the ignitors. Check that the ground
wires from the ignitor controls, the gas valves and
pilot burners are all intact and making good electrical connection. Check to make sure that the
ceramic insulator on the pilot ignitors or sensors is
not broken or cracked, if all are intact, replace the
ignition control IC1 or IC2.
1. Make the same checks and adjustment as
described in “PILOT CHECKOUT” Page 52.
The draft motor runs and the ignitor sparks at the pilot
burner but the pilot does not ignite and a gas odor is
not detected at the draft motor outlet.
1. Check to make sure gas is being supplied to the
unit. Make sure that the gas pressure to the unit is
within the proper limits as described in the “POST
START CHECK LIST” Page 51 and that the pilot
adjust screw is allowing some flow of gas as
described in “PILOT CHECKOUT” Page 52.
Unitary Products Group
The pilot burner ignites but the ignitor continues to
spark and the main burners do not ignite.
2. Check the supply pressure as described in “POST
START CHECK LIST” Page 51. Make adjustments
as necessary.
3. Make sure that the pilot burner is not bent or damaged.
4. Make sure that the ground connections at the pilot
burner, gas valve and ignitor control are intact.
Check the high tension wire for good electrical connection. If all are intact, replace the ignitor module.
The pilot burner lights and the spark stops but the main
burners do not light.
1. Check electrical connections between the ignitor
control and the gas valve. If intact, check for 24
volts across terminals “MV” and “COMMON” terminals. If no voltage detected, replace ignitor control.
If voltage is present, replace gas valve.
59
check the alarm history. The UCB will cycle through the
last five (5) alarms, most recent to oldest, separating
each alarm flash code by approximately 2 seconds.
Furnace lights with roll-out or one burner has delayed
ignition.
1. Make sure that the pilot burner is aligned properly
with the carryover as described in “PILOT CHECKOUT” Page 52.
2. Make sure that the carryovers on adjoining burners
are screwed fast and are level with respect to one
another.
In some cases, it may be necessary to "zero" the
ASCD for the compressors in order to perform troubleshooting. To reset all ASCDs for one cycle, press and
release the UCB TEST button once.
TABLE 28: UNIT CONTROL BOARD FLASH CODES
Flash Code
Main burners light but exhibit erratic flame characteristics.
On Steady
Control Failure - Replace Control
Heart Beat
Normal Operation
1 Flash
1. Adjust air shutters as described in “BURNER AIR
SHUTTER ADJUSTMENT” Page 52.
2. Check the main burner orifices for obstruction and
alignment. Removal procedure is described in
BURNER INSTRUCTIONS Page 52. Clean or
replace burner orifices and burners as needed.
UNIT FLASH CODES
Various flash codes are utilized by the unit control
board (UCB) to aid in troubleshooting. Flash codes are
distinguished by the short on and off cycle used
(approximately 200ms on and 200ms off). To show
normal operation, the control board flashes a 1 second
on, 1 second off "heartbeat" during normal operation.
This is to verify that the UCB is functioning correctly.
Do not confuse this with an error flash code. To prevent
confusion, a 1-flash, flash code is not used.
Current alarms are flashed on the UCB LED. Pressing
and releasing the ALARMS button on the UCB can
Unitary
Products
Group
Not Applicable
2 Flashes
Control waiting ASCD1
3 Flashes
HPS1 - Compressor Lock out
4 Flashes
HPS2 - Compressor Lock out
5 Flashes
LPS1 - Compressor Lock out
6 Flashes
LPS2 - Compressor Lock out
7 Flashes
FS1 - Compressor Lock out
8 Flashes
FS2 - Compressor Lock out
9 Flashes
Ignition Control Locked Out/
Ignition Control Failure / Limit Switch Trip / No
Jumper Plug in Heat Section
10 Flashes
11 Flashes
Compressors Locked Out On Low
Outdoor Air Temperature1
Compressors Locked Out Because The
Economizer Is Using Free Cooling1
12 Flashes
Fan Overload Switch Trip
13 Flashes
Compressor Held Off Due To Low Voltage1
14 Flashes
EEPROM Storage Failure (Control Failure)
OFF
1.
Subject to change without notice. Printed in U.S.A.
Copyright © 2005 by Unitary Products Group. All rights reserved.
Description
No Power or Control Failure
These flash codes do not represent alarms.
129963-YIM-A-0605
Supersedes: 66369-YIM-D-1004
5005
York
Drive
Norman
OK
73069
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