AEG | CGA 75 WOK | Specifications | AEG CGA 75 WOK Specifications

Indoor Gas
Heating Products
Unit Heaters
Duct Furnaces
February 2001
UH-PRC002-EN
Introduction
Trane unit heaters represent a
technological breakthrough in quality.
Trane offers customers the most
complete line of unit heaters anywhere.
And every unit in the line has been rated
for 80 percent thermal efficiency or
better.
Quality products meanTrane value.
So does fair, competitive pricing.The 10year warranty tells youTrane will be here
for the long haul — keeping our
commitment to you.You can count on
Trane standing behind every unit
shipped.That is whatTrane value means.
But higher thermal efficiency and lower
operating costs are just two features of
this product line. Innovation — the
engineering advances you’ve come to
expect fromTrane — can also be found
across this entire line of unit heaters.
And rugged, quality construction
provides years of dependable service.
©American Standard Inc. 2001
UH-PRC002-EN
Contents
Introduction
Feature Highlights
2
Features and Benefits
5
Application Considerations
8
4
Selection Procedure
16
16
17
19
Manual Selection Procedure
Model Number Description
UH-PRC002-EN
General Data
Performance Data
21
Adjustment Factor
21
Controls
27
Electric Power
29
Dimension and Weights
41
Mechanical Specifications
57
3
Features
Highlights
Ten-Year Warranty
Burners
The complete heat exchanger, draft hood
assembly of the unit heater and burners
are warranted by Trane to be free from
defects in material and workmanship for
a period of 10 years from the date of
manufacture. (Warranty not applicable
on duct furnaces or Separated
Combustion units.)
All sizes 30,000 through 400,000 Btu
input are equipped with a proven
design pressed steel burner having a
unique “burner shade” protective
device to prevent scale or foreign
matter from plugging the burner ports.
Quiet Operation
Trane unit heaters incorporate an
exceptionally balanced fan blade to
assure quiet operation.
Heat Exchangers
AllTrane heat exchangers are available in
three types of steel:
• Aluminized Steel (Standard)
• 409 Grade Stainless Steel (Optional)
(30-400 MBh units)
• 321 Grade Stainless Steel (Optional)
(100-400 MBh units)
24V System
All units are equipped with a 24Vcontrol
system which is powered by a 24V
transformer as standard equipment.
Fan Time Delay
The fan time delay is mounted at the
factory as standard equipment (optional
on duct furnaces).This feature eliminates
an initial blast of cold air by allowing the
unit to fire for a short period of time
before actuating the fan motor. After the
thermostat is satisfied (with burners off),
the fan continues to operate for
approximately one minute, removing
residual heat from heat exchanger.
4
Energy Saving Intermittent Pilot Control
The pilot burner is ignited only during
each cycle of operation, thereby
conserving energy during the off cycle.
LP/Natural Operation
All units are available for operation on
either natural or LP gas from our
factory.
Easy Access For Maintenance
AllTrane unit heaters are so designed
that the burner access panel is removed
with just two screws. Burners are
individually removable for inspection
and servicing. Pilot is also accessible
through side panel access door.
Test Fired
AllTrane unit heaters are test fired to
assure proper operation.
Ideal For Retrofit
Trane unit heaters let you pocket fuel
savings from day one and provide
years of dependable service.
UH-PRC002-EN
Features and
Benefits
High-Efficiency Propeller
High-Efficiency Centrifugal
High Efficiency Indoor Duct Furnace
Fan Unit Heaters
Fan Unit Heaters
Trane high-efficiency propeller fan unit
heaters achieve annual fuel savings of
20 to 25 percent over conventional
gravity vented heaters.
Each unit features a factory-installed
flue vent fan and sealed flue collector
that controls combustion and excess
air during the on-cycle.
The high-efficiency centrifugal fan unit
heater keeps energy costs down.The
design advances achieve annual fuel
savings of 20 to 25 percent over
conventional gravity vented heaters.
The high efficiency indoor gas duct
furnace complements our current
centrifugal and propeller fan lines.
All high efficiency lines were designed to
achieve fuel savings of up to
25 percent over conventional gravity
vented heaters.
Heated air no longer escapes through
the draft diverter opening during the
off-cycle. Energy saving intermittent
pilot ignition reduces gas losses.The
pilot only operates when required.
The high-efficiency centrifugal unit
features integral power venting (factoryinstalled) and sealed flue collector for
optimum combustion.
It reduces wind effects on the system’s
efficiency. Intermittent pilot ignition
reduces pilot gas losses and the power
drafter allows for horizontal venting
through side walls. It all adds up to
higher efficiencies and lower installation
costs.
Horizontal power venting, smaller
openings and single-walled vent pipe
reduce heat loss. Higher efficiencies
can reduce equipment and material
costs as well as installation time.
UH-PRC002-EN
In the past, these conventional gravity
vented heaters lost heated room air
through the draft diverter opening.
Conventional gravity vented heaters lost
heated room air through the draft
diverter opening.The high efficiency line
features an integral flue vent fan and
sealed flue collector for improved
combustion. It reduces air requirements
and wind effects on the system’s
efficiency. Intermittent pilot ignition
reduces pilot gas losses and the flue vent
fan allows for horizontal venting through
side walls.
DUCT FURNACES ARE APPROVED FOR
BLOW-THRU APPLICATIONS ONLY.
5
Features and
Benefits
Propeller Fan Unit Heaters
The Trane gas-fired unit heater is a
complete heat generating and
distributing plant, equipped with
automatic safety controls, all packaged in
a modern, streamlined, space saving,
attractive casing for mounting near the
ceiling. Propeller units are basically zero
static pressure appliances. At no time
should ductwork be used with propeller
units.
The designs are certified by AGA and
CGA as conforming with standards for
safe and efficient performance.
Centrifugal Fan Unit Heaters
Centrifugal fan unit heaters are ideal for
commercial and industrial applications
where a low noise level is desired. Trane
centrifugal fan unit heaters which
operate at .2-inches W.C. are extremely
quiet.
Centrifugal fan gas-fired unit heaters
should be selected for applications
where ductwork or discharge nozzles are
to be used.
Separated Combustion Propeller Fan
Unit Heaters
Separated Combustion Centrifugal Fan
Unit Heaters
The Trane separated combustion units
are designed for space heating in mildly
hostile environments.These units can be
installed where dusty, dirty, or mildly
corrosive conditions exist or where high
humidity or slightly negative pressure
prevail.
Typical applications are industrial work
areas with wood or textile dust, nonexplosive contaminated environments,
non-chlorine process areas, automotive
and truck garages and greenhouses.
6
These units achieve higher seasonal
efficiencies by using outside air for
combustion, overcomes slight negative
pressures near exhaust fans or paint
booths and isolates burner from dust,
humidity and chemicals.The combustion
process is separate from the
environment where the unit is installed.
A power venting system draws a
controlled quantity of combustion air
from outside the building.The same
system exhausts flue products to the
outside.The burners, pilot and flue
system are enclosed within the unit, thus
the whole combustion process is literally
unaffected by the atmosphere where the
heater is located.
UH-PRC002-EN
Features and
Benefits
Tubular Heat Exchanger
Propeller Fan Unit Heaters
TheTrane Company has added a new
unit heater to enhance its broad line of
heating products.TheTrane tubular heat
exchanger is a very durable unit heater
that provides an alternative to the
traditional clam shell style.These are
propeller style units that combine the
latest tubular heat exchanger style with
inshot burner technology to create a very
efficient operating unit.
Separated Combustion
Duct Furnace
TheTrane separated combustion duct
furnace is designed to operate efficiently
and reliably, even in environments that
are dusty, dirty or mildly corrosive, or
where high humidity or slightly negative
pressure is present.
Applications include:
Industrial work areas with wood or
textile dust
Non-explosive contaminated
environments
Non-chlorine process areas
Automotive and truck garages
Greenhouses
Duct Furnaces
Horizontal Blower Assemblies
A duct furnace is normally installed in the
distribution duct of an air conditioning
system to supply warm air for heating.
This definition applies only to an
appliance which depends for air
circulation on a blower not furnished as
part of the furnace.
Trane horizontal blower assemblies have
been specially designed for air handling
systems of high static pressure in
combination withTrane duct furnaces.
They are matched against the proper
furnace size for greatest efficiency of
operation.
Knowledge and experience gained from
thousands of installations over many
years have gone into the design of the
Trane gas-fired duct furnace. No effort
has been spared to make this product
one of the best obtainable.The objective
was to produce an appliance that would
be low in first cost and installation cost,
dependable in performance and
endowed with long life under normal
operating conditions.
DUCT FURNACES ARE APPROVED FOR
BLOW-THRU APPLICATIONS ONLY.
UH-PRC002-EN
7
Application
Considerations
General
Propeller fan unit heaters and centrifugal
fan unit heaters are designed for use in
space heating applications.The units are
typically used in areas with high ceilings,
and are exposed in the space to be
heated. Unit heaters offer low installed
cost, and are able to heat large volume
areas without requiring extensive duct
systems.
Duct furnaces are designed for use in
ducted applications with a separate air
handling device such as a horizontal
blower assembly. By utilizing a separate
air source, greater application flexibility
in airflow delivery can be obtained.
Multiple duct furnaces can be used with
an air handling unit to provide zone
heating.
NOTE: When installing duct furnaces in
parallel or in series, minimum clearance
requirements must be considered.This is
required for serviceability of the gas
valve and the high limit. “All duct
furnaces are approved in blow-thru
applications only.”
All duct furnaces are AGA approved
upstream or downstream of the cooling
coil. Recommend optional field installed
drain pan when installed on the
downstream side of the cooling coil.
NOTE: Downstream denotes cooling coil
ahead of the fan section.
When used in conjunction with filters,
cooling coils and an air handler, the duct
furnace can become part of a built-up
heating and cooling system.
Gas Heating Value
The majority of gas heating units are
installed in applications where natural
gas is readily available. In areas where
8
natural gas is not available,Trane units
may be ordered directly from the factory
for use on LP (propane) gas.
Gas heat content varies by fuel type and
location.The standard gross heating
value for natural gas is 1,000 Btu per
cubic foot, and for propane, 2,500 Btu
per cubic foot. Significant variations
selections.To account for variations in
the gross heating value of the fuel, adjust
the total heat input required and select
the unit on the basis of the adjusted load
using the following formula:
Adjusted load = Calculated load x
gross heat value (Btu/cu ft)
Actual gross heat value (Btu/cu ft)
Low Temperature Rise
Trane recommends against the setup of
a unit which will result in a temperature
rise of less than 30°F. With such low
temperature rises, the flue gases passing
through the heat exchanger are cooled
to condensate before reaching the flue
outlet.This condensate is corrosive and
will result in shortened heat exchanger
life.
Air Density
Catalog performance data is based on
elevations up to 2,000 feet above sea
level. Above 2,000 feet the unit’s heating
capacity must be derated four percent
for each 1,000 feet above sea level, and
special orifice selections are required.
Table PAF-1 contains correction factors
that can be applied to the unit’s
cataloged heating capacity, fan rpm, and
fan bhp to obtain actual values for
elevations above 2,000 feet.
Corrosive Atmospheres
Corrosion of heat exchangers and draft
diverters have two basic variables –
moisture (condensation) and sulphur.
These two ingredients form to make
sulfuric acid in the combustion process.
Condensation occurs commonly in
makeup air systems, using large
amounts of fresh air, when air
temperatures entering the heat
exchanger drop to 40°F or below.This
reaction can also occur in recirculating
systems where some quantity of outside
air is introduced upstream of the
exchanger.The sulphur will always be
present as an integral component of the
gas. The resulting concentration of the
acid is governed by the amount of
sulphur in the gas.This concentration
varies from gas to gas and
geographically within the same type
of gas.
Beyond sulfuric acid corrosion there is
the area of chlorinated or halogenated
hydrocarbon vapor corrosion.This type
of corrosion occurs when substances are
mixed with combustion air that will
cause the formation of hydrochloric or
hydrofluoric acid when burned.These
basic substances are found in
degreasers, dry cleaning solvents, glues,
cements, paint removers and aerosol
propellants. Specific chemicals included
in this group are trichloroethylene,
perchloroethylene, carbon tetrachloride,
methylene chloride, methyl chloroform
and refrigerants 11, 12, 21, 22 and 114.
If sufficient PPM content of these
corrosives is present, none of the
common heat exchanger materials will
hold up.The dilemma becomes whether
to place the gas heating equipment
outside of the area to be conditioned, or
use equipment in the space which does
not burn a fuel such as gas (i.e. electric or
hydronic).
Units should not be installed in areas
with corrosive or inflammable
atmospheres. Locations containing
solvents or chlorinated hydrocarbons
will produce corrosive acids when
coming in contact with burner flames.
This reaction will greatly reduce the life
of the heat exchanger and may void the
warranty. For added protection against
heat exchanger corrosion, optional 409
and 321 stainless steel construction is
available. On units using outside air, with
entering air temperature below 40°F,
condensation of flue gas in the heat
exchanger is possible. In these cases,
stainless steel heat exchangers are
recommended.
Careful review of the job application with
respect to use, probable contaminants
within a conditioned space or the
amount of fresh air to be brought in, will
help to make the proper selection of heat
exchanger material.This review will help
to eliminate problems before they begin.
UH-PRC002-EN
Application
Considerations
Indoor Units
Throw Data
Indoor gas unit heaters and duct
furnaces are used primarily in
commercial and industrial structures
such as manufacturing areas,
warehouses, garages, stores,
showrooms, lobbies and corridors.
Throw data for units with standard
louvers and for units with optional
discharge nozzles are in the General Data
section, pages 19 and 20. Optional
nozzles are for use on propeller fan unit
heaters, centrifugal fan unit heaters and
duct furnaces. When greater throw
distance is desired, a 45° nozzle is
recommended. For high mounting
heights, a 90° nozzle may be used. When
wide diffusion is needed, aY splitter
nozzle should be considered. A five-way
nozzle can be used for applications
requiring even air distribution over a
large floor area. (Five-way nozzles are
not available on propeller fan unit
heaters.)
Separated combustion units are used
primarily in industrial work areas with
wood or textile dust, non-explosive
contaminated environments, nonchlorine process areas, automotive and
truck garages and greenhouses.
Unit Placement
Refer to the applicableTrane Installation,
Operation and Maintenance literature for
specific installation instructions.
Installations must conform with local
building codes or in the absence of local
codes with the National Fuel Gas Code
ANSI Z223.1.
When selecting a location for an indoor
unit heater, both the size and weight of
the unit, as well as the heating
requirements of the building, should be
considered. Installation of units in
airplane hangars or public garages
should be in accordance with NFPA No.
409 for aircraft hangars, and NFPA No.
88 for garages.
For proper distribution, air should be
directed towards areas of maximum
heat loss. When multiple units are used,
circulation of heated air around the
space perimeter is recommended.
Satisfactory results can also be obtained
where multiple units are located toward
the center of the area, with heated air
being discharged toward the outside
walls.Throw data for standard unit
heaters and unit heaters utilizing
optional discharge nozzles is shown in
the General Data section, pages 19 and
20.
Locations where extreme drafts can
affect burner operation should be
avoided. Strong drafts may cause pilot
outage. Units with intermittent pilot
ignition may be preferable in areas
where drafts are likely.
Minimum clearances required for
accessibility and safety are listed inTable
GD-1.
UH-PRC002-EN
Indoor Units — Venting
Gas fired indoor units require venting to
remove the products of combustion.To
help assure safe, trouble-free operation,
follow the guidelines listed below:
Natural Venting
1
Provide a vertical flue of at least four feet.
2
Use a flue the same size as the flue
opening on the unit.
3
Provide maximum vertical rise at the
units.
4
Keep horizontal runs to a minimum and
slope flue upward at least ¼-inch per
foot. Horizontal runs should not
exceed 75 percent of the vertical
height of the vent pipe, or chimney,
above the flue pipe connection.
5
Avoid short turns; 45° elbows are
recommended.
6
The vent pipe should be at least six
inches from combustible material and
should be properly insulated when
passing through combustible partitions.
7
Extend flue at least two feet above the
highest point of the roof.
8
Tape flue pipe joints with fireproof paper
or material.
9
Avoid installing units in areas under
negative pressure.
10
Avoid running vent pipe through
unheated spaces. When this cannot be
avoided, insulate the pipe to prevent
condensation of moisture on the inside
walls of the pipe.
11
Where two or more units vent into a
common flue, the cross-sectional area of
the common flue must be equal to the
larger vent connection plus 50 percent of
the area of each additional vent
connection. (Gravity vent units only.)
12
Do not damper the flue piping. Failure to
open such a damper prior to operating
the unit will result in the spillage of flue
gas into the occupied space, activating
the blocked vent (spill) switch.
Flue Vent Fans
Where chimneys of sufficient height are
impractical, or where the distance from
the heater to the chimney is so great that
sufficient draft cannot be created, a flue
vent fan can be used to vent the
products of combustion.The flue vent
fan is normally started and stopped by
the room thermostat. A centrifugal
switch in the flue vent fan operates the
electric gas valve.
Dimensional data for the flue vent fan is
shown inTable DW-14.
9
Application
Considerations
Power Vented Units
Units with a factory installed flue vent
fan.
1
All units must be vented. Power vented
units are designed to use single wallvent
pipe. A BreidertType L, Field Starkap, or
equivalent unit vent cap must be
furnished by the customer.
2
The venting system for these appliances
shall terminate at least 4 feet below, 4
feet horizontally from, or 1 foot above
any door, window or gravity air inlet into
any building.
3
Through-the-wall vents for these
appliances shall not terminate over
public walkways or over an area where
condensate or vapor could create a
nuisance or hazard or could be
detrimental to the operation of
regulators, relief valves, or other
equipment.
4
The vent pipe diameter must be as
shown under “Recommended Flue Size”
in the specification charts. An adaptor
must be field supplied if required.
5
Each furnace must have an
individual vent pipe and vent
terminal. Vent pipe equivalent length
must not exceed 50 feet. Equivalent
length is the total length of straight
sections, plus 15 feet for each 90°
elbow and 8 feet for each 45°
elbow.
6
Maintain 6 inch clearance between vent
pipe and combustible materials. Vent
terminal must be installed with a
minimum clearance of 4 feet from
electric meters, gas meters, regulators,
and relief equipment.
7
Seal vent pipe joints to prevent leakage.
Use General Electric RTV-108 or Dow
Corning RTV-732 Silicone Sealant or 3M
#425 aluminum foil tape.
10
8
Pitch horizontal pipes downward
¼-inch per foot toward outlet for
condensate drainage. Horizontal
portions of the venting system shall be
supported at maximum intervals of
4 feet to prevent sagging.
9
Vertical vent pipes should be equipped
with condensate drains.
10
Insulate single wall vent pipe exposed
to cold air or running through
unheated areas.
FM and IRI Requirements
IRI, which stands for Industrial Risk
Insurers, and FM, which stands for
Factory Mutual, are both basically
insurance companies which insure
commercial/industrial firms against a
variety of losses. Both publish
requirements which must be met by
certain equipment operating in the
facilities they are preparing to insure.
Listed below is our interpretation of the
requirements of both insurers pertaining
to heating units only to the extent of
features/controls required by IRI and/or
FM. There are a number of additional
requirements which pertain to electrical
service, details of installation, etc., and
we urge you to obtain copies of the
publications pertaining to these details if
you are involved in a job where IRI or FM
adherence has been indicated.The
requirements detailed herein are our
interpretations of the latest publications
in our possession and we must disclaim
any responsibility for errors due to our
interpretation and/or lack of any updated
revision of these standards. Our intent is
to provide you with an understanding of
the application of these standards and
how we believe our indirect-fired gas
heating equipment applies.
IRI Requirements
1
All input sizes require 100 percent
shutoff.This requires that any natural gas
unit, equipped with intermittent pilot
ignition, must employ a “lock out” type
ignition system which will shut off pilot
gas if the pilot fails to light at any time.
This system is required by AGA on LP
gas units as standard equipment.
However, for natural gas units, you need
to specify on the order “Natural Gas, 100
percent shutoff.”
2
All units require AGA certification or UL
“listed” controls. Our units are AGA
certified and meet this requirement.
3
Models with inputs of 150,000 to 400,000
Btu require “mechanical exhaust” and
a “safety interlock.” For our units this
means a power vented or drafter
equipped unit. In both instances, if the
flue vent fan (factory or field installed)
does not get up to speed, the unit will
not fire, satisfying the safety interlock
portion.
FM Requirements
1
All units must be AGA certified or UL
listed. Our units are AGA certified.
2
The high limit control must be in a
circuit, the voltage of which does not
exceed 120 VAC. All of our high limits
would meet this requirement.
The specific requirement for an “IRI or
FM GasTrain,” while it applies to direct
and indirect-fired gas heating equipment
as well as oil-fired, comes into play only
with units having an input in excess of
400,000 Btu.This may be one of the
reasons why the majority of gas heating
equipment manufacturers (indirect-fired)
limit their largest individual furnace to
400,000 Btu.
UH-PRC002-EN
Application
Considerations
Minimum/Maximum
Gas Inlet Pressures
Gas valves are suitable to a maximum
inlet pressure of 0.5 psi (14 inches water
column) on natural gas. If the main gas
supply pressure is greater than
14 inches W.C., a step-down pressure
regulator must be field installed ahead of
the gas valve. Minimum inlet pressure for
natural gas units is 5 inches W.C.
For LP (propane) gas, the minimum inlet
pressure is 11.0 inches W.C.
and the maximum inlet pressure is
14.0 inches W.C.
High Pressure Regulators —
Natural Gas Only
TheTrane indoor gas heating products
contained in this catalog, are designed
to operate at a pressure of 3.5-inch W.C.
(Water Column) when firing on natural
gas. This is the “manifold” pressure or
that which is present at the burner
orifices. All five and six-function valves
provide a built-in pressure regulator
which is capable of reducing “supply”
pressures from a maximum of 14-inch
W.C. (½ psi) down to
3.5-inch W.C. on the leaving side of the
valve.The valve typically “drops” about
1½-inch so the minimum supply
pressure is 5-inch W.C.
Whenever supply pressures exceed
14-inch W.C., a high pressure regulator
should be selected. We supply a
Rockwell regulator which is fitted with
pressure springs and capacity orificing
to meet the requirements of each
specific job.
In order to select the proper spring/
orifice combination, we need to know
what the supply pressure is on that
particular job and the input size of the
unit being ordered. More than one unit
can be run from one regulator; however,
we recommend that each unit have its
own regulator.
We require that the “job” supply
pressure be included on all jobs
requiring high pressure regulators along
with the unit size.The table that follows
displays the regulators range as it
pertains to inlet pressure and MBh. N/A
requires the customer to contact a local
utility or an industrial supply house.
These devices are not available from
Trane for LP gas. LP accessories must be
secured from the gas supplier/ supply
house.
Table AC-1 — Orifice Chart: Rockwell 043-182 Regulator
Inlet
Pressure
1 psi
2
3
5
10
20
40
60
80
100
125
UH-PRC002-EN
25-200
3/8”
3/8”
3/8”
3/8”
3/8”
1/4”
1/4”
1/8”
1/8”
1/8”
1/8”
Capacity in MBH for Natural Gas
225-300
350-500
600
700
N/A
N/A
N/A
N/A
3/8”
N/A
N/A
N/A
3/8”
3/8”
N/A
N/A
3/8”
3/8”
3/8”
3/8”
3/8”
3/8”
3/8”
3/8”
1/4”
1/4”
1/4”
1/4”
1/4”
1/4”
1/4”
1/4”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
1/8”
800
N/A
N/A
N/A
3/8”
3/8”
5/16”
1/4”
3/16”
N/A
1/8”
1/8”
Spring
Required
Blue (only)
Blue (only)
Blue or Green
Blue or Green
Blue or Green
Blue or Green
Blue or Green
Blue or Green
Blue or Green
Blue or Green
Blue or Green
11
Application
Considerations
Mounting Detail
(Hanging Hardware Supplied by Others)
Steel Construction
Wood Construction
12
UH-PRC002-EN
Venting unit heaters and duct furnaces
used to be as simple as remembering
that warm air rises. With the introduction
of new venting equipment and safety
controls, things have become a little
more technical.Today’s contractor has to
know a lot more about proper venting to
get the job done within code at a
reasonable price.
For starters ANSI now categorizes vented
appliances into four categories. Category
I includes non-condensing appliances
with negative vent pressure, like the
traditional atmospheric unit heater.
Venting Categories
Non-Condensing
Negative
Vent Pressure
I
Positive
Vent Pressure
III
Condensing
II
IV
Category II groups condensing
appliances with negative vent pressure.
Category III appliances are noncondensing and operate with a positive
vent pressure, like the traditional power
vented unit heater. Category IV covers
condensing appliances with positive vent
pressure.
Application
Considerations
(Venting
Unit Heaters)
When a factory owner replaces an old
unit heater, having an efficiency of
65 percent, he expects to benefit from
the higher efficiency of the new unit. This
efficiency brings a system change with it
in the form of lower flue temperatures,
closer to the dewpoint.
If the old stack isn’t corrosion resistant
deterioration may be sudden.The mild
acid that forms when vent gas
condenses will gradually eat away at the
metal. Eventually the stack will rust
through leaking fumes and
condensation.
Sharing Flues with Other Appliances
To avoid condensation be certain to use
stacks of the right size. Oversize stacks
draw slower, allowing more time for
condensation. For naturally vented units
use B vent.This insulated vent pipe
contains vent heat, reducing the chances
of condensation.This is particularly
important for vents running through
unheated areas.
In addition to problems from
condensation, contractors have had to
become aware of new mandated
controls. In addition to a high limit
switch, the primary power circuit for
naturally vented atmospheric gas unit
heaters now contains a “spill” switch.
This switch, a manually resettable
thermo disk type device, senses a
blocked flue. Sensitive to a rise in
temperature in the draft diverter, the spill
switch cuts off power to the gas valve
stopping combustion.
UH-PRC002-EN
Always be certain that the flue can
handle the combined operation of all
appliances connected to it. Never
assume that one appliance will operate
at a time. When connecting into the stack
or breaching always connect the device
with the largest input first. This limits the
potential for flue gases to escape out
other outlets and warms the entire
chimney. Avoid installing appliances
directly across from each other when
entering the stack.This might force the
draft from one appliance to vent out the
opposing draft diverter.
When piping to a stack NEVER reduce
the appliance vent size. Use smooth
transitions and long bends. Abrupt
transitions and tight elbows create
resistance and turbulence that can limit
vent capacity. Never connect power
vented devices to common flues.
Mechanically vented appliances must
have dedicated vents to the point of
termination.
Tie smaller units into larger. Avoid cross
connections that feed backwards into
another flue.
Natural Draft Unit Heaters
The gravity vented unit heater still has
the greatest acceptance, but the new
high efficiency of gravity unit heaters add
some new twists to venting. As efficiency
rises more heat gets extracted from the
flue gas.This heat had been driving the
vent system in natural draft systems.
With lower flue gas temperatures,
velocities in the chimney decrease. In
turn this lower velocity can cause flue
gases to reach the point at which they
will condense.
Traditionally unit heaters get installed in
pairs, sharing a common flue between
two heaters. When a unit heater must
share a flue with another appliance a few
cautions are appropriate.
Spill Switch
Problems arise in buildings that have
experienced back drafting from negative
pressure for years. As new units replace
old, the back drafting causes the units to
shutdown, uncovering a makeup air
problem that has gone uncorrected for
years.
13
Application
Considerations
Power Vented Unit Heaters
(Venting
Unit Heaters)
Power Vented Unit Heater
Mechanically vented appliances have
enjoyed increasing acceptance in
American facilities. Power vented unit
heaters allow installation without the
need to penetrate expensive roofing
materials. They also offer more flexibility
in placement of individual unit heaters.
Mechanical venting occurs when a
power blower provides a positive air
flow to exhaust vent gas.The blower
may be mounted at the unit heater or at
the point of termination. With a factory
installed power venter, a pressure switch
detects the flow of vent gas before the
gas valve is allowed to open. With third
party drafters usually a centrifugal switch
monitors the operation of the blower
motor. When properly installed, the
switch senses motor rotation and allows
the gas valve to operate. Interlocking the
blower to the gas valve provides some
control over the combustion process.
Using a factory unit with a pressure
sensitive switch ensures that control.
With all their advantages power venters
bring some requirements as well. Each
manufacturer determines the maximum
length of pipe and fittings that his system
can use for safe operation. Remember to
count the fittings and allow for their
higher resistance to flow.The total length
of run includes not only the piping length
but the resistance of all the fittings
including the termination cap.
Many contractors have become
accustomed to using B vent with natural
draft units. Used with power vented
appliances indoors, B vent is
unacceptable. B vent does not allow
positive pressure in the vent piping to be
sealed from the heated space. Proper
installation uses 24-gauge, single wall
vent pipe and each joint sealed with
temperature resistant sealant or tape.
Vent Termination Locations
(minimum distance)
14
UH-PRC002-EN
Heat
Fumes
Humidity
Application
Considerations
(Venting
Unit Heaters)
Contractors must also be aware of the
conditions at the point of termination.
The National Fuel Gas Code NFPA 54/
ANSI Z223.1-1992 mandates that vent
system should terminate at least 4 feet
below, 4 feet horizontally or 1 foot above
any window, door, or gravity inlet to a
building.Termination with a vent cap
approved by the manufacturer should
occur well above the snow line.
When positioning the intake and exhaust
vents on separated combustion
equipment, the intake and outlet must
mount on the same outside surface.This
ensures that any wind effects balance
out. Remember to keep the vents at least
18” apart to avoid drawing exhaust air
into the intake air.
Beyond satisfying the codes, vents
should be positioned away from shrubs
and plants that might be affected by
unseasonable warming by the exhaust.
Sidewall vents release a considerable
amount of water vapor that may
condense on cold siding, adversely
affecting painted surfaces. Placing these
vents in locations that get natural air
circulation from prevailing winds may
help to reduce these negative effects.
Separated Combustion Venting
Another form of mechanical venting
includes those unit heaters that use a
powered exhaust also to pull in outside
air. Most often found on condensing
furnaces, separated combustion does
not use room air for combustion. Instead
these unit heaters use a second run of
pipe to supply fresh outdoor air.
The separated combustion approach
offers several advantages. First, it does
not use warm indoor air to fire the unit
heater.This saves energy by avoiding
drawing unheated make-up air into the
living space. Second, the unit heater has
an unlimited source of air for
combustion. In many of the new super
insulated buildings appliances can be
starved for combustion air. In
contaminated atmospheres the use of
separated combustion unit heaters
assures that the heat exchanger sees
only non-corrosive air.
UH-PRC002-EN
WithTrane’s separated combustion unit
heaters intake air and exhaust air run
through standard 24-gauge galvanized
pipe. Remember that separated
combustion unit heaters still have high
vent temperatures. Use of PVC, CPVC
and other plastic vent materials are
inappropriate and hazardous. Check the
manufacturer’s instructions before
piping any appliance.
The vent gases of power vented and
separated combustion unit heaters may
condense on a cold start-up or when
vent piping runs through unheated
areas.To protect the heater always pitch
both intake and exhaust piping toward
the outside of the building. Remember
also that no power vented equipment
can share a common flue with any other
appliance. Should a flue become blocked
one appliance could vent into the
occupied space.
Approved vent caps should be used on
both the intake and exhaust
terminations. For greater convenience
Trane offers a concentric vent adapter
that allows venting through a single
perforation through the building wall or
roof.
Opportunities Using Trane Gas Products
Whatever venting configuration your job
requires,Trane offers a unit heater to
meet your needs.Trane offers the
reliability of traditional standing pilot
systems, always vented by natural draft.
We offer spark ignition natural draft and
power vented unit heaters and the new
separated combustion unit heaters.
15
Selection
Procedure
Determine the total heating load
requirements in accordance with
methods recommended by the ASHRAE
Handbook of Fundamentals or other
acceptable means.
Propeller Fan Unit Heater
1
From the performance data tables, select
the unit whose heating output meets or
exceeds the heating load requirement.
2
Airflow (cfm) and temperature rise can
be read directly from the performance
data tables.
3
Knowing the mounting height of the
unit, throw can be determined from the
performance data table. If the throw is
not adequate, consider using a larger
propeller fan unit heater or a centrifugal
fan unit heater with an optional
discharge nozzle for greater throw.
Selection Example —A natural gas
propeller fan unit heater that can provide
75 MBh heating output is required. The
unit will be mounted 10 feet above the
floor and a 40-foot throw is required.
Select the unit as follows:
a
FromTable PD-5, select a GPND-010 with
a 100.0 MBh input and 80.0 MBh heating
output, 1,480 cfm and a 50°F
temperature rise.
b
FromTable GD-2, throw at a mounting
height of 10 feet is 54 feet.
Centrifugal Fan Unit Heater
1
From the performance data tables, select
the unit whose heating output meets or
exceeds the heating load requirement.
2
Airflow (cfm) ranges are listed for each
unit size in the performance data tables.
Knowing either the desired airflow or
temperature rise, the other can be
calculated using the following formulas:
cfm = Output x 1,000
1.085 x ∆T
∆T =
16
Output x 1,000
1.085 x cfm
3
Knowing the mounting height of the
unit, throw can be determined from the
performance data table. If the throw is
not adequate, a discharge nozzle can be
used to obtain additional throw.
Selection Example —An LP (Propane)
gas centrifugal fan unit heater that can
provide 150 MBh heating output is
required. An airflow of 2,000 cfm is
desired.The unit will be mounted 12 feet
above the floor and a 65-foot throw is
required.
Select the unit as follows:
a
FromTable PD-7, select a GCPD-020 with
a 200.0 MBh input and 160.0 MBh
heating output. An airflow of 2,000 cfm
is within the allowable range, and
temperature rise is calculated as follows:
∆T = MBh x 1,000
1.085 x cfm
∆T =
160 x 1,000 = 74.0°F
1.085 x 2,000
b
FromTable GD-2, throw at a 12-foot
mounting height is 61 feet. As a 61-foot
throw is not adequate, a 60 degree
nozzle can be selected (fromTable
GD-4) which provides a throw of
76 feet.
Duct Furnace
1
From the performance data tables, select
the unit whose heating output meets or
exceeds the heating load requirement.
2
Given the airflow to be supplied to the
duct furnace, temperature rise and
pressure drop through the duct furnace
can be read directly from the
performance data charts. If the air
temperature rise is below 30°F, some
supply air must be bypassed around the
duct furnace. If the air temperature rise is
over 80°F, additional supply air must be
delivered to the duct furnace.
Selection Example — A natural gas duct
furnace that can provide 300 MBh
heating output is required. An airflow of
5,000 cfm is being provided to the duct
furnace.
Select the unit as follows:
a
FromTable PD-8, select a GDND-040 with
a 400.0 MBh input and 320.0 MBh
heating output.
b
From Chart PD-1, temperature rise at
5,000 cfm is 58°F and pressure drop is
0.16 inches.
Horizontal Blower Assembly
1
From the performance data tables, select
the blower assembly that provides the
needed airflow at the required static
pressure, and determine the required
motor size and fan speed.
2
If a blower assembly is to be used with a
duct furnace, refer to the dimensional
data table to determine which blower to
use with the given duct furnace.The duct
furnace pressure drop must be added to
the pressure drop of the duct system
before entering the blower assembly
performance data tables. Enter the
performance data table at the required
airflow and at the total external static
pressure to determine the motor size
and fan speed.
Selection Example — A GDND-040 duct
furnace is to be used with a horizontal
blower assembly. An airflow of 5,000
cfm is required.The pressure drop of the
duct system is 0.54 inches, and the
pressure drop of the duct furnace is 0.16
inches.
Select the unit as follows:
a
FromTable DW-13, select a HBAC-45 for
use with the GDND-040 duct furnace.
b
FromTable PD-9, an HBAC-45 at 5,000
cfm and 0.7 inches static pressure (0.54
inch ductwork + 0.16-inch furnace)
requires a 1½ hp motor with a fan speed
of 720 rpm.
UH-PRC002-EN
Model
Number
Description
Indoor Gas Heating Units
G P N D 003 A A F 1 0 0 0 0 +
1 2 3 4 5,6,7 8 9 10 11 12 13 14 15
Digit 1 — Gas Heating Equipment
Digit 2 — Product Type
P = Propeller Fan Unit Heater
B = High Efficiency Centrifugal Fan
Unit Heater
C = Centrifugal Fan Unit Heater
D = Indoor Duct Furnace
L = High Efficiency Indoor Duct Furnace
H = High Efficiency Propeller Fan Unit Heater
A = Separated Combustion Propeller Fan
Unit Heater
K = Separated Combustion Centrifugal Fan
Unit Heater
M = Separated Combustion Indoor Duct
Furnace
T =Tubular Heat Exchanger - Propeller Type
S = Special
Digit 3 — Fuel
N = Natural Gas
P = LP Gas (Propane)
S = Special
Digit 4 — Development Sequence
D = Fourth Generation
Digits 5-7 — Input Capacity
Single Furnace
003 = 30 MBh
R03 = 30 MBh
004 = 45 MBh
R04 = 45 MBh
006 = 60 MBh
R06 = 60 MBh
007 = 75 MBh
R07 = 75 MBh
009 = 90 MBh
R09 = 90 MBh
010 = 100 MBh
022 = 225 MBh
012 = 125 MBh
025 = 250 MBh
015 = 150 MBh
030 = 300 MBh
017 = 175 MBh
035 = 350 MBh
020 = 200 MBh
040 = 400 MBh
*Residential - Tubular Only
Digit 8 — Main Power Supply
A = 115/60/1
E = 460/60/3
B = 230/60/1
F = 575/60/3
C = 208/60/3
S = Special
D = 230/60/3
Digit 9 — Gas Control Option
A = Single-Stage, Standing Pilot
D = Single-Stage, Intermittent Pilot Ignition
E =Two-Stage, Intermittent Pilot Ignition
F = Hydraulic Modulating, Intermittent Pilot
Ignition (60-100°F)
G = Hydraulic Modulating with Bypass,
Intermittent Pilot Ignition (60-100°F)
H = Electronic Modulating with Room
T-Stat, Intermittent Pilot Ignition
J = Electronic Modulating with Duct-Stat,
Intermittent Pilot Ignition
K = Single-Stage, Hot Surface Pilot Ignition
L = Electronic Modulating with External
4-20 mA Input
N = Electronic Modulating with External
0-10 VDC Input
P = Hydraulic Modulating, Intermittent Pilot
Ignition (75-150°F)
R = Hydraulic Modulating with Bypass,
Intermittent Pilot Ignition (75-150°F)
S = Special
Digit 10 — Design Sequence
F = Sixth Design
Digit 11 — Heat Exchanger Material
1 = Aluminized Steel
2 = #409 Stainless Steel2
3 = #321 Stainless Steel3
S = Special
Digit 12 — Rooftop Arrangements
0 = None (Indoor Unit)
S = Special
Digit 13 — Rooftop Heating Unit
Motor Selection
0 = None (Indoor Unit and Rooftop Duct
Furnace
S = Special
Digit 14 — Rooftop Fan Section
0 = None (Indoor Unit and Rooftop Duct
Furnace)
S = Special
Digit 15 — Miscellaneous Options —
All Units
0 = None
A = #409 Stainless Steel Burners3
B = Orifices For Elevation Above 2000 Feet
(Specify Elevation)
S = Special
Propeller Fan Unit Heater
(Std., Hi-Effic. and Separated Combustion)
C = #409 Stainless Steel Draft Diverter
D = Summer-Winter Switch
E = Vertical Louvers
J =Totally Enclosed Motor
7 = OSHA Fan Guard
Centrifugal Fan Unit Heater
(Std., Hi-Effic. and Separated Combustion)
C = #409 Stainless Steel Draft Diverter
D = Summer-Winter Switch
E = Vertical Louvers
H = Duct Discharge Flange
J =Totally Enclosed Motor
Duct Furnace (Indoor) (Std. or Hi-Effic.)
C = #409 Stainless Steel Draft Diverter
D = Summer-Winter Switch
F = Horizontal Louvers
G = Horizontal and Vertical Louvers
K = Side Access Burner Drawer (Left Hand)*
L = FanTime Delay Control
M = Side Access Burner Drawer (Right
Hand)*
Separated Combustion Indoor Duct Furnace
C = #409 Stainless Steel Draft Diverter
D = Summer-Winter Switch
F = Horizontal Louvers
G = Horizontal and Vertical Louvers
Tubular Heat Exchanger, Propeller Type
J =Totally Enclosed Motor
7 = OSHA Fan Guard
Notes:
1. All units are AGA approved. For CGA approved units,
contact Clarksville Technical Support.
2. Available on the tubular sizes 100-400 only.
3. Not available for tubular.
*The left or right hand side of the side access burner
drawer, options K & M, is determined by facing the air
outlet side of the duct furnace.
UH-PRC002-EN
17
Model
Number
Description
(Horizontal Blower
Assembly)
Horizontal Blower Assembly
HBA C
15 A A A C
123 4
56 7
0 +
8 9 10 11
Digit 1-3 — Horizontal Blower Assembly
Digit 4 — Development Sequence
C =Third Generation
Digit 5-6 — Blower Size
15= Nominal 1500 cfm
20= Nominal 2000 cfm
30= Nominal 3000 cfm
45= Nominal 4500 cfm
Digit 9 — Motor Horsepower
A = 1/3 hp
E = 1½ hp
B = ½ hp
F = 2 hp
C = ¾ hp
S = Special
D = 1 hp
(Specifies Duct Furnace Size)
Digit 10 — Design Sequence
C = Third Design
0
A
B
C
D
E
Digit 11 — Miscellaneous Options
0 = None
1 = Insulation
3 = Totally Enclosed Motor
S = Special
Digit 7 — Transition Size
18
Digit 8 — Main Power Supply
A = 115/60/1
D = 230/60/3
B = 230/60/1
E = 460/60/3
C = 208/60/3
S = Special
= None
= 100 MBh
= 125 MBh
= 150 MBh
= 175 MBh
= 200 MBh
F = 225 MBh
G = 250 MBh
H = 300 MBh
J = 350 MBh
K = 400 MBh
UH-PRC002-EN
General
Data
Table GD-1 — Minimum Clearances
Sides
Top
Bottom
Flue
Standard Unit Heater Applications
Duct
Furnace
18”
6”
21”*
6”
Propeller & Centrifugal
Fan U.H.
18”
6”
21”
6”
*21” clearance is required for bottom access to
burners and pilot. If a side pull-out burner drawer is
ordered (duct furnace only), bottom clearance can be
reduced to six inches. Side clearance, however, must
be increased such that it is adequate for burner drawer
removal. Reference Tables DW-10 and DW-11.
Table GD-2 – Standard Unit Heater Approximate Distance of Throw at Nominal Airflow
Distance From
Floor to Bottom
of Unit “H”
30
ft./(m)
(8.8)
8
33
(2.4)
(10.1)
10
28
(3.0)
(8.5)
12
NR
(3.7)
15
NR
(4.6)
20
NR
(6.1)
45
(13.2)
33
(10.1)
28
(8.5)
NR
60
(17.6)
33
(10.1)
28
(8.5)
NR
75
(22.0)
40
(12.2)
35
(10.7)
NR
NR
NR
NR
100
(29.3)
60
(18.3)
54
(16.5)
44
(13.4)
NR
NR
NR
NR
NR
Unit Size – Input MBh – (kW)
125
150
175
200
(36.6)
(43.9)
(51.2)
(58.6)
65
70
75
80
(19.8)
(21.3)
(22.9)
(24.4)
56
60
64
68
(17.1)
(18.3)
(19.5)
(20.7)
46
49
57
61
(14.0)
(14.9)
(17.4)
(18.6)
NR
45
49
52
(13.7)
(14.9)
(15.8)
NR
NR
NR
46
(14.0)
225
(65.9)
85
(25.9)
72
(21.9)
65
(19.8)
56
(17.1)
50
(15.2)
250
(73.2)
90
(27.4)
78
(23.8)
68
(20.7)
60
(18.3)
54
(16.5)
300
(87.8)
105
(32.0)
90
(27.4)
80
(24.4)
70
(21.3)
63
(19.2)
350
(102.5)
110
(33.5)
95
(29.0)
84
(25.6)
74
(22.6)
66
(20.1)
400
(117.1)
120
(36.6)
100
(30.5)
90
(27.4)
80
(24.4)
70
(21.3)
Table GD-3 – 30 Degree Nozzle – Approximate Distance of Throw at Nominal Airflow
Distance From
Floor to Bottom
of Unit “H”
100
125
ft./(m)
(29.3) (36.6)
30° Nozzle
150
(43.9)
Unit Size – Input MBh – (kW)
175
200
225
250
(51.2) (58.6)
(65.9) (73.2)
300
350
(87.8) (102.5)
400
(117.1)
8
(2.4)
65
(19.8)
70
(21.3)
75
(22.9)
80
(24.4)
85
(25.9)
90
(27.4)
95
(29.0)
115
(35.1)
120
(36.6)
125
(38.1)
10
(3.0)
57
60
(17.4) (18.3)
64
(19.5)
68
(20.7)
72
(21.9)
78
(23.8)
86
(26.2)
99
(30.2)
105
(32.0)
110
(33.5)
12
(3.7)
50
54
(15.2) (16.5)
57
(17.4)
60
(18.3)
64
(19.5)
70
(21.3)
77
(23.5)
88
(26.8)
94
(28.7)
100
(30.5)
48
(14.6)
50
(15.2)
53
(16.2)
59
(18.0)
64
(19.5)
74
(22.6)
79
(24.1)
84
(25.6)
NR
44
(13.4)
47
(14.3)
53
(16.2)
58
(17.7)
66
(20.1)
71
(21.6)
75
(22.9)
15
(4.6)
NR
45
(13.7)
20
(6.1)
NR
NR
NR = Not Recommended
Notes:
1. All throw data figures are approximate.
2. NR = not recommended at these mounting heights.
3. Nozzles are not available on units below size 100 MBh.
4. Nozzles are available for High Efficiency units. Specify High Efficiency when ordering due to difference in nozzle
configuration.
UH-PRC002-EN
19
General
Data
60° Nozzle
Table GD-4 – 60 Degree Nozzle – Approximate Distance of Throw at Nominal Airflow
Distance From
Floor to Bottom
of Unit “H”
100
125
ft./(m)
(29.3) (36.6)
90° Nozzle
150
(43.9)
Unit Size – Input MBh – (kW)
175
200
225
250
(51.2) (58.6)
(65.9) (73.2)
300
350
(87.8) (102.5)
400
(117.1)
8
(2.4)
75
80
(22.9) (24.4)
85
(25.9)
90
(27.4)
95
(29.0)
100
(30.5)
110
(33.5)
125
(38.1)
130
(39.6)
138
(42.1)
10
(3.0)
65
(19.8)
70
(21.3)
75
(22.9)
79
(24.1)
83
(25.3)
88
(26.8)
95
(29.0)
109
(33.2)
115
(35.1)
120
(36.6)
12
(3.7)
60
(18.3)
64
(19.8)
68
(20.7)
72
(21.9)
76
(23.2)
80
(24.4)
84
(25.6)
100
(30.5)
103
(31.4)
108
(32.9)
15
(4.6)
50
54
(15.2) (16.5)
56
(17.1)
61
(18.6)
65
(19.8)
68
(20.7)
71
(21.6)
85
(25.9)
88
(26.8)
94
(28.7)
52
(15.8)
55
(16.8)
59
(18.0)
61
(18.6)
65
(19.8)
77
(23.5)
81
(24.7)
85
(25.9)
20
(6.1)
NR
49
(14.9)
Table GD-5 – 90 Degree Nozzles – Approximate Floor Coverage at Nominal Airflow
Unit
Size
100
10'
(3.0)
NR
125
NR
150
NR
175
NR
200
NR
225
NR
250
NR
300
NR
350
NR
400
NR
Distance From Floor to Bottom of Unit “H” – ft./(m)
15'
20'
25'
(4.6)
(6.1)
(7.6)
30 x 25
NR
NR
(9.1 x 7.6)
35 x 30
NR
NR
(10.7 x 9.1)
40 x 35
NR
NR
(12.2 x 10.7)
45 x 40
NR
NR
(13.7 x 12.2)
50 x 40
40 x 35
NR
(15.2 x 12.2)
(12.2 x 10.7)
55 x 40
48 x 35
NR
(16.8 x 12.2)
(14.6 x 10.7)
60 x 45
56 x 40
50 x 35
(18.3 x 13.7)
(17.1 x 12.2)
(15.2 x 10.7)
70 x 45
65 x 40
60 x 35
(21.3 x 13.7)
(19.8 x 12.2)
(18.3 x 10.7)
80 x 50
70 x 45
65 x 40
(24.4 x 15.2)
(21.3 x 13.7)
(19.8 x 12.2)
100 x 50
80 x 45
75 x 40
(30.5 x 15.2)
(24.4 x 13.7)
(22.9 x 12.2)
30'
(9.1)
NR
NR
NR
NR
NR
NR
NR
55 x 35
(16.8 x 10.7)
60 x 35
(18.3 x 10.7)
65 x 40
(19.8 x 12.2)
“Y” Splitter
Table GD-6 – “Y” Splitters – Approximate Distance of Throw at Nominal Airflow
Distance From
Floor to Bottom
of Unit “H”
100
125
ft./(m)
(29.3) (36.6)
150
(43.9)
Unit Size – Input MBh – (kW)
175
200
225
250
(51.2) (58.6)
(65.9) (73.2)
300
350
(87.8) (102.5)
400
(117.1)
8
(2.4)
47
51
(14.3) (15.5)
60
(18.3)
65
(19.8)
70
(21.3)
72
(21.9)
80
(24.4)
95
(29.0)
100
(30.5)
103
(31.4)
10
(3.0)
41
44
(12.5) (13.4)
52
(15.8)
56
(17.1)
61
(18.6)
63
(19.2)
69
(21.0)
82
(25.0)
87
(26.5)
92
(28.0)
12
(3.7)
37
40
(11.3) (12.2)
47
(14.3)
51
(15.5)
55
(16.8)
57
(17.4)
63
(19.2)
75
(22.9)
79
(24.1)
82
(25.0)
NR = Not Recommended
Notes:
1. All throw data figures are approximate.
2. NR = not recommended at these mounting heights.
3. Nozzles are not available on units below size 100 MBh.
4. Nozzles are available for High Efficiency units. Specify High Efficiency when ordering due to difference in nozzle
configuration.
20
UH-PRC002-EN
Performance
Data
Table PD-1 – High Efficiency Propeller Fan Gas Unit Heater Performance Data
Model
Unit Size
Input
MBh
(kW)
Output
MBh
(kW)
Thermal Efficiency
Free Air Delivery
cfm
(cu. m/s)
Air Temperature Rise
°F
°F
Outlet Velocity
fpm
(m/s)
Full Load Amps at 115V
Motor Data:
hp
(kW)
Type
rpm
Amps @ 115V
GHND/
GHPD
003
GHND/ GHND/
GHPD GHPD
004
006
GHND/ GHND/ GHND/ GHND/
GHPD GHPD GHPD GHPD
007
010
012
015
GHND/
GHPD
017
GHND/ GHND/ GHND/
GHPD GHPD GHPD
020
022
025
GHND/
GHPD
030
GHND/
GHPD
035
GHND/
GHPD
040
30
8.8
45
13.2
60
17.6
75
22.0
100
29.3
125
36.6
150
43.9
175
51.2
200
58.6
225
65.9
250
73.2
300
87.8
350
102.5
400
117.1
24
7.0
80%
36
10.5
80%
42
14.1
80%
60
17.6
80%
80
23.4
80%
100
29.3
80%
120
35.1
80%
140
41.0
80%
160
46.9
80%
120
52.7
80%
200
58.6
80%
240
70.3
80%
280
82.0
80%
320
93.7
80%
750
0.354
800
0.378
1,050
0.496
1,100
0.519
1,480
0.699
1,650
0.779
2,200
1.038
2,530
1.194
2,640
1.246
2,700
1.274
3,100
1.463
4,400
2.077
5,000
2.360
5,300
2.502
30
17
42
23
42
23
50
28
50
28
56
31
50
28
51
28
56
31
61
34
60
33
50
28
52
29
56
31
680
3.45
4.5
720
3.66
4.5
610
3.10
4.5
640
3.25
4.5
775
3.94
5.8
910
4.62
6
1,045
5.31
7.2
1,070
5.44
8.2
1,010
5.13
8.2
950
4.83
8.2
980
4.98
8.2
1,100
5.59
11.2
1,150
5.84
13.2
1,050
5.33
13.2
1/30
0.025
SP
1,050
1.3
1/30
0.025
SP
1,050
1.3
1/30
0.025
SP
1,050
1.3
1/30
0.025
SP
1,050
1.3
1/20
0.037
SP
1,050
2.6
1/10
0.075
SP
1,050
2.8
1/4
0.186
PSC
1,140
4.0
1/3
0.249
PSC
1,140
4.5
1/3
0.249
PSC
1,140
4.5
1/3
0.249
PSC
1,140
4.5
1/3 (2)1/4
(2)1/3
(2)1/3
0.249 (2) 0.186 (2) 0.249 (2) 0.249
PSC
PSC
PSC
PSC
1,140
1,140
1,140
1,140
4.5
8.0
9.0
9.0
Notes:
1. Ratings are shown for elevations up to 2,000 feet above sea level. Above 2,000 feet, input must be derated 4 percent for each 1,000 feet above sea level.
2. Standard 115/60/1 open drip-proof motor.
3. Thermal efficiency for the 003 and 004 units are based on stack in horizontal position.
4. The flue vent fan motors used on all high efficiency units are 115/60/1; 1/20 hp and 1.5 amps.
Table PD-2 – High Efficiency Centrifugal Fan Unit Heater Performance Data
Model
Unit Size
Input
MBh
(kW)
Output
MBh
(kW)
Thermal Efficiency
Free Air Delivery
cfm
(cu. m/s)
Air Temperature Rise
°F
°C
Outlet Velocity
fpm
(m/s)
Full Load Amps at 115V
Motor Data :
hp
(kW)
Type
rpm
Amps @ 115V
GBND/
GBPD
010
GBND/
GBPD
012
GBND/
GBPD
015
GBND/
GBPD
017
GBND/
GBPD
020
GBND/
GBPD
022
GBND/
GBPD
025
GBND/
GBPD
030
GBND/
GBPD
035
GBND/
GBPD
040
100
29.3
125
36.6
150
43.9
175
51.2
200
58.6
225
65.9
250
73.2
300
87.8
350
102.5
400
117.1
80
23.4
80%
100
29.3
80%
120
35.1
80%
140
41.0
80%
160
46.9
80%
180
52.7
80%
200
58.6
80%
240
70.3
80%
280
82.0
80%
320
93.7
80%
1,200
0.566
1,575
0.743
1,975
0.932
2,300
1.086
2,400
1.133
2,600
1.227
2,850
1.345
3,950
1.864
4,600
2.171
4,800
2.266
62
34
59
33
56
31
56
31
62
34
64
36
65
36
56
31
56
31
62
34
880
4.47
8.3
950
4.83
9.8
1,030
5.23
10.6
1,045
5.31
10.6
965
4.90
15.2
935
4.72
15.2
930
4.72
15.2
1,080
5.49
15.2
1,090
5.54
18.6
1,000
5.08
18.6
¼
0.19
SHP
1,725
5.1
1/3
0.25
SHP
1,725
6.6
½
0.37
SHP
1,725
7.4
½
0.37
SHP
1,725
7.4
¾
0.56
SHP
1,725
12.0
¾
0.56
SHP
1,725
12.0
¾
0.56
SHP
1,725
12.0
¾
0.56
SHP
1,725
12.0
1
0.75
CS
1,725
15.4
1
0.75
CS
1,725
15.4
Notes:
1. Ratings are shown for elevations up to 2,000 feet above sea level. Above 2,000 feet, input must be derated 4 percent for each 1,000 feet above sea level.
2. Standard motors are 115V 60 Hz, single phase open drip-proof.
3. The flue vent fan motors used on all high efficiency units are 115/60/1; 1/20 hp and 1.5 amps. All other voltages will require an additional transformer.
4. SPH= Split Phase; CS = Capacitor Start
5. 0.2” maximum external static pressure.
Table PAF-1 — Altitude Correction Factors
Altitude Above Sea Level (FT)
Gas Heating Capacity
Fan rpm
Fan bhp
0
1.00
1.00
1.00
Correction Factors For High Altitude Installations
2,000
3,000
4,000
5,000
6,000
0.92
0.88
0.84
0.80
0.76
1.04
1.06
1.09
1.12
1.15
1.07
1.12
1.18
1.25
1.33
7,000
0.72
1.19
1.41
Notes:
1. For high altitude installations above 2,000’, reduce ratings 4% for each 1,000’ above sea level.
2. Multiply standard unit by correction factor to get actual input and required rpm and hp.
UH-PRC002-EN
21
Performance
Data
Table PD-3 – Separated Combustion Propeller Fan Gas Unit Heater Performance Data
Model
Unit Size
Input
MBh
(kW)
Output
MBh
(kW)
Thermal Efficiency
Free Air Delivery
cfm
(cu. m/s)
Air Temperature Rise
°F
°C
Outlet Velocity
fpm
(m/s)
Full Load Amps at 115V
Motor Data:
hp
(kW)
Type
rpm
Amps @ 115V
GAND/
GAPD
010
GAND/
GAPD
012
GAND/
GAPD
015
GAND/
GAPD
017
GAND/
GAPD
020
GAND/
GAPD
022
GAND/
GAPD
025
GAND/
GAPD
030
GAND/
GAPD
035
GAND/
GAPD
040
100
29.3
125
36.6
150
43.9
175
51.2
200
58.6
225
65.9
250
73.2
300
87.8
350
102.5
400
117.1
80
23.4
80%
100
29.3
80%
120
35.1
80%
140
41.0
80%
160
46.9
80%
180
52.7
80%
200
58.6
80%
240
70.3
80%
280
82.0
80%
320
93.7
80%
1480
0.699
1650
0.779
2200
1.038
2530
1.194
2640
1.246
2700
1.274
3100
1.463
4400
2.077
5000
2.360
5300
2.502
50
28
56
31
50
28
51
28
56
31
61
34
60
33
50
28
52
29
56
31
775
3.9
5.8
910
4.6
6.0
1045
5.3
7.2
1070
5.4
7.8
1000
5.1
7.8
950
4.8
7.8
980
5.0
8.8
1100
5.6
11.2
1150
5.8
12.2
1050
5.3
12.2
1/20
0.037
SP
1,050
2.6
1/10
0.075
SP
1,050
2.8
1/4
0.186
PSC
1,140
4.0
1/3
0.249
PSC
1,140
4.5
1/3
0.249
PSC
1,140
4.5
1/3
0.249
PSC
1,140
4.5
1/2
0.373
PSC
1,140
5.5
(2) 1/4
(2) 0.186
PSC
1,140
8.0
(2) 1/3
(2) 0.249
PSC
1,140
9.0
(2) 1/3
(2) 0.249
PSC
1,140
9.0
Notes:
1. Ratings are shown for elevations up to 2,000 feet above sea level. Above 2,000 feet, input must be derated 4 percent for each 1,000 feet above sea level.
2. Standard motor is 115/60/1 open drip-proof.
3. SP = Shaded Pole; PSC = Permanent Split Capacitor.
Table PD-4 – Separated Combustion Centrifugal Fan Gas Unit Heater Performance Data
Model
Unit Size
Input
MBh
(kW)
Output
MBh
(kW)
Thermal Efficiency
Free Air Delivery
cfm
(cu. m/s)
Air Temperature Rise
°F
°C
Outlet Velocity
fpm
(m/s)
Full Load Amps at 115V
Motor Data:
hp
(kW)
Type
rpm
Amps @ 115V
GKND/
GKPD
010
GKND/
GKPD
012
GKND/
GKPD
015
GKND/
GKPD
017
GKND/
GKPD
020
GKND/
GKPD
022
GKND/
GKPD
025
GKND/
GKPD
030
GKND/
GKPD
035
GKND/
GKPD
040
100
29.3
125
36.6
150
43.9
175
51.2
200
58.6
225
65.9
250
73.2
300
87.8
350
102.5
400
117.1
80
23.4
80%
100
29.3
80%
120
35.1
80%
140
41.0
80%
160
46.9
80%
180
52.7
80%
200
58.6
80%
240
70.3
80%
280
82.0
80%
320
93.7
80%
1,200
0.566
1,575
0.743
1,975
0.932
2,300
1.086
2,400
1.133
2,600
1.227
2,850
1.345
3.950
1.864
4,600
2.171
4,800
2.266
62
34
59
33
56
31
56
31
62
34
64
36
65
36
56
31
56
31
62
34
880
4.47
8.3
950
4.83
9.8
1030
5.23
10.6
1045
5.31
10.6
965
4.90
15.2
935
4.75
15.2
930
4.72
15.2
1080
5.49
15.2
1090
5.54
18.6
1000
5.08
18.6
¼
0.19
SPH
1725
5.1
1/3
0.25
SPH
1725
6.6
½
0.37
SPH
1725
7.4
½
0.37
SPH
1725
7.4
¾
0.56
SPH
1725
12.0
¾
0.56
SPH
1725
12.0
¾
0.56
SPH
1725
12.0
¾
0.56
SPH
1725
12.0
1
0.75
CS
1725
15.4
1
0.75
CS
1725
15.4
Notes:
1. Ratings are shown for elevations up to 2,000 feet above sea level. Above 2,000 feet, input must be derated 4 percent for each 1,000 feet above sea level.
2. Standard motor is 115/60/1 open drip-proof.
3. SPH = Split Phase; CS = Capacitor Start.
22
UH-PRC002-EN
Performance
Data
Table PD-5 – Propeller Fan Gas Unit Heater Performance Data
Model
Unit Size
Input
MBh
(kW)
Output
MBh
(kW)
Thermal Efficiency
Free Air Delivery
cfm
(cu. m/s)
Air Temperature Rise
°F
°C
Outlet Velocity
fpm
(m/s)
Full Load Amps at 115V
Motor Data:
hp
(kW)
Type
rpm
Amps @ 115V
GPND/
GPPD
003
GPND/
GPPD
004
GPND/
GPPD
006
GPND/ GPND/
GPPD GPPD
007
010
GPND/
GPPD
012
GPND/
GPPD
015
GPND/
GPPD
017
GPND/
GPPD
020
GPND/
GPPD
022
GPND/
GPPD
025
GPND/
GPPD
030
30
8.8
45
13.2
60
17.6
75
22.0
24.3
7.1
81%
36.5
10.7
81%
48.6
14.2
81%
700
0.330
800
0.378
30
17
GPND/
GPPD
035
GPND/
GPPD
040
100
29.3
125
36.6
150
43.9
175
51.2
200
58.6
225
65.9
250
73.2
300
87.8
350
102.5
400
117.1
60.8
17.8
81%
80
23.4
80%
100
29.3
80%
120
35.1
80%
140
41.0
80%
160
46.9
80%
180
52.7
80%
200
58.6
80%
240
70.3
80%
280
82.0
80%
320
93.7
80%
1050
0.496
1100
0.519
1480
0.699
1650
0.779
2200
1.038
2530
1.194
2640
1.246
2700
1.274
3100
1.463
4400
2.077
5000
2.360
5300
2.502
42
23
42
23
50
28
50
28
56
31
50
28
51
28
56
31
61
34
60
33
50
28
52
29
56
31
700
3.6
2.1
750
3.8
2.1
640
3.3
2.1
672
3.4
2.1
950
4.8
3.4
900
4.6
3.6
1045
5.3
4.8
1070
5.4
5.8
1000
5.1
5.8
950
4.8
5.8
980
5.0
5.8
1100
5.6
8.8
1150
5.8
10.8
1050
5.3
10.8
1/30
0.025
SP
1,050
1.3
1/30
0.025
SP
1,050
1.3
1/30
0.025
SP
1,050
1.3
1/30
0.025
SP
1,050
1.3
1/20
0.037
SP
1,050
2.6
1/10
0.075
SP
1,050
2.8
1/4
0.186
PSC
1,140
4.0
1/3
0.249
PSC
1,140
4.5
1/3
0.249
PSC
1,140
4.5
1/3
0.249
PSC
1,140
4.5
1/3 (2) 1/4
(2) 1/3
(2) 1/3
0.249 (2) 0.186 (2) 0.249 (2) 0.249
PSC
PSC
PSC
PSC
1,140
1,140
1,140
1,140
4.5
8.0
9.0
9.0
Notes:
1. Ratings are shown for elevations up to 2,000 feet above sea level. Above 2,000 feet, input must be derated 4 percent for each 1,000 feet above sea level.
2. Standard motor is 115/60/1 open drip-proof.
3. SP = Shaded Pole; PSC = Permanent Split Capacitor
4. Unit amps are based on standing pilot units.
Table PD-6 – Tubular Heat Exchanger Performance Data
Model
GTND/
GTPD
003
Unit Size
Input
MBh
30
(kW)
8.8
Output
MBh
24.3
(kW)
7.1
Thermal Efficiency
81
Free Air Delivery
cfm
500
(cu m/s)
0.236
Air Temperature Rise
°F
45
°C
25
Full Load Amps at 120V
4.9
Motor Data
hp
1/20
(kW)
0.37
Type
SP
rpm
1,650
Amps at 115V
1.9
GTND/
GTPD
004
GTND/
GTPD
006
GTND/ GTND/
GTPD GTPD
007
009
GTND/
GTPD
010
GTND/
GTPD
012
GTND/
GTPD
015
GTND/
GTPD
017
GTND/
GTPD
020
GTND/
GTPD
025
GTND/
GTPD
030
45
13.2
60
17.6
75
22.0
36.5
10.7
81
48.6
14.2
81
750
0.355
GTND/
GTPD
035
GTND/
GTPD
040
90
26.4
100
29.3
125
36.6
150
43.9
175
51.2
200
58.6
250
73.2
300
87.8
350
102.5
400
117.1
60.8
17.8
81
72.9
21.4
81
81.0
23.7
81
101.3
29.6
81
121.5
35.6
81
141.8
41.5
81
162.0
47.5
81
202.5
59.3
81
243.0
71.2
81
283.5
83.0
81
324.0
95.0
81
1,000
0.473
1,250
0.591
1,500
0.710
1,600
0.756
2,200
1.039
2,400
1.133
2,850
1.346
3,200
1.511
3,450
1.629
5,000
2.361
5,600
2.644
5,800
2.738
45
25
4.9
45
25
5.6
45
25
5.6
45
25
5.6
47
26
6.6
42
23
8.0
47
26
7.8
46
26
8.3
47
26
8.3
54
30
8.3
45
25
12.5
47
26
12.5
51
28
12.5
1/20
0.37
SP
1,650
1.9
1/20
0.37
SP
1,050
2.6
1/20
0.37
SP
1,050
2.6
1/20
0.37
SP
1,050
2.6
1/10
0.75
SP
1,050
2.8
1/4
0.19
PSC
1,140
4.0
1/4
0.19
PSC
1,140
4.0
1/3
0.25
PSC
1,140
4.5
1/3
0.25
PSC
1,140
4.5
1/3
0.25
PSC
1,140
4.5
1/4
0.19
PSC
1,140
8.0
1/3
0.25
PSC
1,140
9.0
1/3
0.25
PSC
1,140
9.0
Notes:
1. Ratings are shown for elevations up to 2,000 feet above sea level. Above 2,000 feet, input must be derated 4 percent for each 1,000 feet above sea level.
2. CS = Capacitor Start; SPH = Split Capacitor
3. Standard motors are 115/60/1 open drip-proof.
4. 0.2 maximum external static pressure.
5. Unit amps are based on hot surface pilot ignition.
UH-PRC002-EN
23
Performance
Data
Table PD-7 – Centrifugal Fan Gas Unit Heater 80% Thermal Efficiency Performance Data
Model
Unit Size
Input
MBh
(kW)
Output
Btu
(kW)
Thermal Efficiency
Free Air Delivery
cfm
(cu. m/s)
Air Temperature Rise
°F
°C
Outlet Velocity
fpm
(m/s)
Full Load Amps at 115V
Motor Data:
hp
(kW)
Type
rpm
Amps @ 115V
GCND/
GCPD
010
GCND/
GCPD
012
GCND/
GCPD
015
GCND/
GCPD
017
GCND/
GCPD
020
GCND/
GCPD
022
GCND/
GCPD
025
GCND/
GCPD
030
GCND/
GCPD
035
GCND/
GCPD
040
100
29.3
125
36.6
150
43.9
175
51.2
200
58.6
225
65.9
250
73.2
300
87.8
350
102.5
400
117.1
80
23.4
80%
100
29.3
80%
120
35.1
80%
140
41.0
80%
160
46.9
80%
180
52.7
80%
200
58.6
80%
240
70.3
80%
280
82.0
80%
320
93.7
80%
1,200
0.566
1,575
0.743
1,975
0.932
2,300
1.086
2,400
1.133
2,600
1.227
2,850
1.345
3,950
1.864
4,600
2.171
4,800
2.266
62
34
59
33
56
31
56
31
62
34
64
36
65
36
56
31
56
31
62
34
880
4.47
5.9
950
4.83
7.4
1030
5.23
8.2
1045
5.31
8.2
965
4.90
12.8
935
4.75
12.8
930
4.72
12.8
1080
5.49
12.8
1090
5.54
16.2
1000
5.08
16.2
1/4
0.19
SPH
1725
5.1
1/30
0.25
SPH
1725
6.6
1/20
0.37
SPH
1725
7.4
1/20
0.37
SPH
1725
7.4
3/4
0.56
SPH
1725
12.0
3/4
0.56
SPH
1725
12.0
3/4
0.56
SPH
1725
12.0
3/4
0.56
SPH
1725
12.0
1
0.75
CS
1725
15.4
1
0.75
CS
1725
15.4
Notes:
1. Ratings are shown for elevations up to 2,000 feet above sea level. Above 2,000 feet, input must be derated 4 percent for each 1,000 feet above sea level.
2. CS = Capacitor Start; SPH = Split Capacitor
3. Standard motors are 115/60/1 open drip-proof.
4. Unit amps are based on standing pilot units.
5. 0.2” maximum external static pressure.
Table PD-8 – Indoor Gas Duct Furnace Performance Data – Standard or High Efficiency
Models
GDND/GDPD/
GLND/GLPD
Unit
Size
010
012
015
017
020
022
025
030
035
040
Input
MAX
MBh
(kW)
100
29.3
125
36.6
150
43.9
175
51.2
200
58.6
225
65.9
250
73.2
300
87.8
350
102.5
400
117.1
MIN
MBh
(kW)
50
14.6
62.5
18.3
75
22.0
87.5
25.6
100
29.3
112.5
32.9
125
36.6
150
43.9
175
51.2
200
58.6
Output
MBh
(Kw)
80
23.4
100
29.3
120
35.1
140
41.0
160
46.9
180
52.7
200
58.6
240
70.3
280
82.0
320
93.7
MIN.
cfm
(cu. m/s)
929
0.438
1157
0.546
1389
0.656
1620
0.765
1852
0.874
2083
0.983
2315
1.093
2778
1.311
3241
1.530
3704
1.748
Temp.
Rise
°F
(°C)
80
44
80
44
80
44
80
44
80
44
80
44
80
44
80
44
80
44
80
44
P.D.
In. of
H2O
(kPa)
0.12
0.03
0.13
0.03
0.15
0.04
0.14
0.03
0.14
0.03
0.14
0.03
0.14
0.03
0.13
0.03
0.13
0.03
0.14
0.03
MAX.
cfm
(cu.m/s)
2469
1.165
3086
1.457
3704
1.748
4321
2.040
4938
2.331
5556
2.622
6173
2.914
7407
3.496
8642
4.079
9877
4.662
Temp.
Rise
°F
(°C)
30
17
30
17
30
17
30
17
30
17
30
17
30
17
30
17
30
17
30
17
P.D.
In. of
H2O
(Pascals)
0.85
0.21
0.85
0.21
0.85
0.21
0.85
0.21
0.85
0.21
0.85
0.21
0.85
0.21
0.87
0.22
0.87
0.22
0.90
0.22
Note:
Ratings are shown for elevations up to 2,000 feet above sea level. Above 2,000 feet input must be derated four percent for each 1,000 feet above sea level.
24
UH-PRC002-EN
Performance
Data
Table PD-9 – Horizontal Blower Assembly Performance Data
External Static Pressure
Models
HBAC-15
HBAC-20
HBAC-30
HBAC-45
Water
In.
0.2
Kpa
0.05
Nominal Blower cfm
rpm
hp
cfm
Size
cu.m/s
kW
1/3
1,250
525
0.590
0.25
1/3
1,500
10”
1,500
600
0.708
0.25
1/3
1,750
650
0.826
0.25
2,000
700
½
0.944
0.37
1/3
1,500 425
0.708
0.25
1/3
1,750
450
0.826
0.25
1/3
2,000
475
0.944
0.25
2,000
12”
2,250
515
½
1.062
0.37
2,500
540
½
1.180
0.37
2,750
575
½
1.298
0.37
1/3
1,750 450
0.826
0.25
1/3
2,000
475
0.944
0.25
2,250
500
½
1.062
0.37
3,000
12”
2,500
525
½
1.180
0.37
2,750
560
½
1.298
0.37
3,000
610
½
1.416
0.37
3,250
630
¾
1.534
0.56
3,500
675
¾
1.652
0.56
2,750 400
¾
1.298
0.56
3,000
425
¾
1.416
0.56
3,500
430
¾
1.652
0.56
4,000
450
¾
1.888
0.56
4,500
475
¾
2.124
0.56
5,000
500
¾
2.360
0.56
4,500
12”
5,500
530
1
2.596
0.75
6,000
575
1½
2.832
1.12
6,500
610
1½
3.068
1.12
7,000
720
1½
3.304
1.12
7,500
800
2
3.540
1.49
8,000
860
2
3.776
1.49
0.3
0.07
rpm
650
hp
kW
1/3
0.25
680
1/3
0.25
710
1/3
760
0.25
½
0.37
500
1/3
0.25
515
1/3
0.25
530
560
590
615
510
1/3
0.25
½
0.37
½
0.37
½
0.37
1/3
0.25
525
1/3
0.25
550
½
0.37
580
½
0.37
605
½
0.37
640
¾
0.56
675
¾
0.56
700
1
0.75
450
¾
0.56
475
¾
0.56
480
¾
0.56
500
¾
0.56
525
¾
0.56
540
¾
0.56
575
1
0.75
615
1½
1.12
660
2
1.49
790
2
1.49
860
2
1.49
930
3
2.24
0.4
0.5
0.10
0.12
hp rpm
hp
kW
kW
1/3
1/3
680
760
0.25
0.25
1/3
1/3
715
790
0.25
0.25
750
½
805
½
0.37
0.37
800
½
850
½
0.37
0.37
1/3
1/3
550
630
0.25
0.25
1/3
560
635
½
0.25
0.37
590
½
640
½
0.37
0.37
610
½
650
½
0.37
0.37
625
½
670
½
0.37
0.37
650
¾
690
¾
0.56
0.56
1/3
1/3
560
630
0.25
0.25
590
½
635
½
0.37
0.37
600
½
645
½
0.37
0.37
615
½
665
½
0.37
0.37
640
¾
685
¾
0.56
0.56
660
¾
710
¾
0.56
0.56
700
1
735
1
0.75
0.75
725
1
775
1
0.75
0.75
510
¾
0.56
550
¾
600
¾
0.56
0.56
560
¾
610
¾
0.56
0.56
565
¾
615
¾
0.56
0.56
575
¾
620
1
0.56
0.75
600
1
630
1
0.75
0.75
615
1
650
1½
0.75
1.12
660 1½
690
1½
1.12
1.12
710
2
750
2
1.49
1.49
830
2
860
2
1.49
1.49
900
3
930
3
2.24
2.24
960
3
NA
2.24
rpm
0.6
0.15
rpm hp
kW
1/3
780
0.25
810
½
0.37
850
½
0.37
890
½
0.37
680
690
700
710
730
675
680
685
700
715
750
750
800
650
660
670
680
690
700
715
800
910
960
NA
½
0.37
½
0.37
¾
0.56
¾
0.56
¾
0.56
½
0.37
½
0.37
½
0.37
¾
0.56
¾
0.56
1
0.75
1
0.75
1
0.75
¾
0.56
¾
0.56
1
0.75
1
0.75
1
0.75
1½
1.12
1½
1.12
2
1.49
3
2.24
3
2.24
0.7
0.17
rpm hp
kW
1/3
840
0.25
860
½
0.37
890
½
0.37
925
¾
0.56
725
740
750
760
780
720
735
740
750
775
790
790
840
-
½
0.37
½
0.37
¾
0.56
¾
0.56
¾
0.56
½
0.37
½
0.37
¾
0.56
¾
0.56
¾
0.56
1
0.75
1
0.75
1½
1.12
-
0.8
0.9
0.20
0.22
rpm
hP
rpm
hp
kW
kW
— Not Applicable —
895
½
0.37
¾
0.56
980
¾
0.56
940
-
½
0.37
¾
0.56
795
¾
0.56
800
¾
0.56
790
785
790
805
815
830
875
-
½
0.37
¾
0.56
1,010
¾
0.56
-
-
785
785
970
990
½
0.37
¾
0.56
¾
0.56
¾
0.56
1
0.75
1
0.75
1½
1.12
-
-
-
810
¾
0.56
¾
0.56
820
¾
0.56
830
1
0.75
815
810
810
815
825
845
860
890
-
¾
0.56
¾
0.56
¾
0.56
1
0.75
1
0.75
1
0.75
1½
1.12
-
-
-
-
-
-
700
1
0.75
1
0.75
1
0.75
1½
1.12
1½
1.12
2
1.49
2
1.49
3
2.24
730
1
0.75
1
0.75
1
0.75
1½
1.12
1½
1.12
2
1.49
3
2.24
3
2.24
-
-
790
1
0.75
1½
1.12
1½
1.12
1½
1.12
2
1.49
3
2.24
710
715
720
700
760
840
940
740
750
760
730
800
890
960
800
810
820
830
930
-
NA
NA
NA
NA
NA
NA
NA
*External Static Pressure in inches of water. Add pressure drop of indoor duct furnace, if used, to pressure drop of ductwork, to determine total external static pressure.
HBAC units are for use with specific duct furnace sizes. Reference Table DW-13.
UH-PRC002-EN
25
Performance
Data
Table PD-10 – Separated Combustion Indoor Gas Duct Furnace
Input
Models
GMND/GMPD
010
012
015
017
020
022
025
030
035
040
(Max)
MBh
(kW)
100
(29.3)
125
(36.6)
150
(43.9)
175
(51.2)
200
(58.6)
225
(65.9)
250
(73.2)
300
(87.8)
350
(102.5)
400
(117.1)
Output
(Min)
MBh
(kW)
50
(14.6)
62.5
(18.3)
75
(22.0)
87.5
(25.6)
100
(29.3)
112.5
(32.9)
125
(36.6)
150
(43.9)
175
(51.2)
200
(58.6)
MBh
(kW)
80
(23.4)
100
(29.3)
120
(35.1)
140
(41.0)
160
(46.9)
180
(52.7)
200
(58.6)
240
(70.3)
280
(82.0)
320
(93.7)
Min.
cfm
(cu. m/s)
822
(0.388)
1028
(0.485)
1233
(0.582)
1439
(0.679)
1645
(0.776)
1850
(0.873)
2056
(0.970)
2467
(1.164)
2878
(1.358)
3289
(1.552)
Temp. Rise
°F
(°C)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
90
(50)
P.D.
In. of H20
(kPa)
0.10
(0.02)
0.09
(0.02)
0.09
(0.02)
0.09
(0.02)
0.09
(0.02)
0.09
(0.02)
0.09
(0.02)
0.10
(0.02)
0.10
(0.02)
0.10
(0.02)
Max.
cfm
(cu.m/s)
3700
(1.746)
4625
(2.183)
5550
(2.620)
6475
(3.056)
7401
(3.493)
8326
(3.930)
9251
(4.366)
11101
(5.240)
12951
(6.113)
14801
(6.986)
Temp. Rise
°F
(°C)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
20
(11)
P.D.
in. of H20
(Pascals)
2.03
(0.51)
1.92
(0.48)
1.81
(0.45)
1.86
(0.46)
1.90
(0.47)
1.93
(0.48)
1.96
(0.49)
2.00
(0.50)
2.02
(0.50)
2.05
(0.51)
Note:
Ratings are shown for elevations up to 2,000 feet (610m) above sea level. Above 2,000 feet (610m) input must be derated 4% for each 1,000 feet (305m) above sea level. When units
are installed in Canada, any reference to derations at altitudes in excess of 2,000 feet (610m) are to be ignored. At altitudes of 2,000 to 4,500 (610 to 1372m), the units must be
orificed to 90% of the normal altitude rating, and be so marked in accordance with the CGA certification.
Chart PD-1 – Performance Data Curves for all Duct Furnaces
26
UH-PRC002-EN
Controls
Gas Controls
Pilot Control
Single-Stage Control
Standing pilot is standard on indoor duct
furnaces, propeller fan unit heaters and
centrifugal fan unit heaters. High
efficiency units (centrifugal, propeller and
duct furnaces) ship as standard with
intermittent pilot ignition.The separated
combustion propeller and centrifugal fan
unit heaters also ship as standard with
intermittent pilot ignition.
Indoor gas heating units are provided
with an automatic single-stage gas valve
as standard.This valve is an on/off type
control, typically activated by a low
voltage single-stage thermostat.
Intermittent pilot ignition contains a
solid-state ignition control system that
ignites the pilot by spark for each cycle of
operation. When the pilot flame is
proven, the main burner valve opens to
allow gas flow to the burners. Both the
pilot and burners are extinguished
during the off cycle.
Intermittent pilot ignition is ideal for
limited access installations where
manual lighting of the pilot may be
difficult. Nuisance pilot outages on units
mounted in areas subject to occasional
severe drafts can also be eliminated.
Energy savings will be realized using this
system as the pilot is extinguished
during the off cycle. Intermittent pilot
ignition should be considered on units
that have long shutoff periods.
(Required on shipments to California.)
Fan Control
The supply fan motor is activated directly
through the fan time delay relay on
indoor units provided with single-phase
motors up to one hp. Contactors or
starters are required on all other units
with single-phase motors 1½-hp and
above, and with all three-phase motors.
On indoor units, contactors and starters,
where required, are provided. (See table
below.)
Two-Stage Control
Indoor units with optional two-stage
control are provided with a two-stage
gas valve capable of firing at 100 percent
and 50 percent of rated input. Ignition is
at low fire (50 percent of the unit’s rated
input) and the unit is typically controlled
by a low voltage two-stage thermostat.
Hydraulic Modulating Control
Units with optional hydraulic modulating
control are provided with a modulating
gas valve capable of firing from 50
percent to 100 percent of rated input.
Ignition is at low fire (50 percent of
input).The hydraulic modulating valve is
controlled by a sensing bulb located in
the discharge airstream which
modulates the gas input from 50 percent
to 100 percent of rated input.The unit is
also provided with an automatic electric
valve in series with the hydraulic
modulating valve, which typically cycles
the unit in response to a low voltage
single-stage thermostat. Units that do
not utilize a thermostat will operate as a
standing pilot unit.The ignitor will light
the pilot.The pilot will remain on until
power is disconnected from the units.
Hydraulic Modulating Control with
Bypass
An additional electric valve is provided in
parallel with the hydraulic modulating
valve.The electric valve bypasses the gas
flow around the hydraulic modulating
valve, allowing full fire and overriding
the modulating valve’s sensing bulb
control.The electric valve is activated by
a low voltage single-stage thermostat.
(Thermostat not included)
(N/A on 30-75 MBh units)
Electronic Modulating Control
This optional control is available for use
with natural gas units only. Units with
electronic modulating control are
provided with an electronic modulating
valve capable of firing from 100 percent
to 50 percent of rated input. Ignition is at
full fire (100 percent of unit’s rated input).
The electronic modulating valve is
controlled by a room thermostat or a
duct thermostat with remote setpoint
adjustment which modulates the gas
input from 100 percent to 50 percent of
rated input. An optional override room
thermostat is available for use with the
duct thermostat.The override room
thermostat allows full fire and overrides
the duct thermostat when the room
temperature falls below the override
room thermostat’s setpoint. (N/A on 3075 MBh units)
Electronic Modulating — 4-20 mA/0-10
VDC Input
Provides modulated heat output. Ignition
is at full fire (100 percent input), and
modulates the gas input from 100
percent to 40 percent rated input.
The modulating gas valve shall operate
in response to a 4-20 mA or a 0-10 VDC
input from an external DDC control.
Voltage
115/60/1
230/60/1
208/60/3
230/60/3
460/60/3
½ hp
1
1
2
2
3
¾hp
1
1
2
2
3
1hp
1
1
2
2
3
1½hp
2
2
2
2
3
2hp
2
2
2
2
3
3hp
N/A
N/A
2
2
3
5hp
N/A
N/A
2
2
3
7½hp
N/A
N/A
4
4
5
10hp
N/A
N/A
4
4
5
Notes:
1. Contactors not required or provided on units with single phase motors up to one hp.
2. Provided with contactor with line voltage holding coil on all 11/2 hp and above single-phase motors and on all 208
230V three-phase motors up to five hp.
3. Provided with contactor with low (24V) holding coil on all 460V three-phase motors up to five hp.
4. Provided with size 2 starter on all units with 71/2 and 10 hp 208/230V three-phase motors.
5. Provided with size 1 starter on all units with 71/2 and 10 hp 460V three-phase motors.
UH-PRC002-EN
27
Controls
Electronic Modulating Room Thermostat
(Included with Gas Control)
Thermostats Single-Stage Room Thermostat
(Order No. 350-0015-01)
Single-Stage Duct Thermostat
(Order No. 350-0015-07)
•
•
•
•
• Low Voltage (24V)
• 55 to 95 F Range
• 2 7/8” W x 4 ¾” H x 1 1/8” D
•
•
•
•
Low Voltage (24V)
60 to 85 F Range
5 13/16” W 3 ¼” H 1 7/8” D
Natural Gas Only
Electronic Modulating Duct Thermostat
(Included with Gas Control)
•
•
•
•
Low Voltage (24V)
55 to 90 F Range
Sensor: 10-inch Probe
RemoteTemperature Selector:
4 ¼” W 4 ¼” H 1 7/8” D
• DuctThermostat:
4 ¼” W 4 ¼” H 1 5/8” D
• Natural Gas Only
Low Voltage (24V)
55 to 175 F Range
5’ Capillary
2” W x 5 5/8” H x 2 7/16” D
Single-Stage Room Thermostat with
Summer/Winter Switch
(Order No. 350-0015-02)
Two-Stage Duct Thermostat
Order No. 350-0015-08)
•
•
•
•
•
•
•
•
Low Voltage (24V)
55 to 95 F Range
Fan Auto-On Switch
3 ½” W x 4 1/5” H x 1 3/8” D
Low Voltage (24V)
55 to 175 F Range
5’ Capillary
2” W x 5 5/8” H x 2 7/16” D
Universal Guard (Order No. 350-0015-06)
Electronic Modulating Override Room
Thermostat for use with Duct Thermostats
(Order No. 350-0015-05)
•
•
•
•
Line Voltage (115V)
50 to 90 F Range
2 7/8” W 4 9/16” H 1 ¼” D
Natural Gas Only
28
Two-Stage Room Thermostat
(Order No. 350-0015-03)
•
•
•
•
•
Low Voltage (24V)
42 to 88 F Range
Fan Auto-On Switch
System Off-Auto Switch
5 5/8” W x 3 ½” H x 2 1/8” D
•
•
•
•
•
Clear Plastic
Ring Base
Tumbler Lock andTwo Keys
Cover: 6 7/8” W x 5 5/8” H x 3“D
Base: 6 9/16” W x 5 ½” H x 3/8” D
UH-PRC002-EN
Electric
Power
Sequence of Operation
Typical wiring diagrams and sequence of
operations for indoor units with
intermittent pilot ignition are shown
below. On duct furnaces, the fan motor
and associated controls shown in the
wiring diagrams are not integral to the
unit. It is essential, however, that the air
handling system be interlocked with the
duct furnace to prevent duct furnace
operation without airflow.
Single-Stage Control
With power applied to the unit:
1
The thermostat calls for heat.
2
The pilot valve opens.
3
The ignitor sparks continuously to ignite
the pilot.
4
The sensor proves pilot ignition and
shuts off the ignitor.
5
With the pilot lit, the main gas valve
opens.
6
Main burners are lit at 100 percent of
unit’s rated input.
7
The fan time delay relay (optional on
duct furnaces) allows the heat exchanger
to come up to operating temperature. At
this time, the fan time delay relay closes
and activates the fan motor.*
8
The unit continues to fire until the
thermostat is satisfied and no longer
calls for heat.
9
The main and pilot valves close.
10
The fan time delay relay remains closed,
keeping the fan operating to dissipate
residual heat from the heat exchanger. At
this time, the fan time delay relay opens
and deactivates the fan motor.
NOTE:This unit is equipped with a
blocked vent shutoff (spill) switch. If the
venting system becomes blocked or
there is continuous spillage, the vent
shutoff switch will shut off the unit
heater.
*See Fan Controls on page 27.
• Caution - Disconnect power before
servicing.
• Unit must be grounded.
• Use copper conductors only.
• If any of the original wire as supplied
with the appliance must be replaced, it
must be replaced with wiring material
having a temperature rating of at least
125°C.
• Refer to installation instructions for
venting, gas piping and start-up
procedures.
• - - - Indicates Field Wiring.
• ___ Indicates Factory Wiring.
UH-PRC002-EN
29
Electric
Power
Two-Stage Control
With power applied to the unit:
1
The first stage of the thermostat calls for
heat.
2
The pilot valve opens.
3
The ignitor sparks continuously to ignite
the pilot.
4
The sensor proves pilot ignition and
shuts off the ignitor.
5
With the pilot lit, the main gas valve
opens to low fire.
6
Main burners are lit at 50 percent of
unit’s rated input.
7
The fan time delay relay (optional on
duct furnaces) allows the heat exchanger
to come up to operating temperature. At
this time, the fan time delay relay closes
and activates the fan motor*.
8
If additional heat is required, the second
stage of the thermostat calls for heat.
9
The main gas valve opens to full fire.The
main burners are now at full fire.The unit
continues at full fire until the second
stage of the thermostat is satisfied and
no longer calls for heat.
10
The main valve closes to low fire.The
main burners are now at low fire.The
unit continues at low fire until the first
stage of the thermostat is satisfied and
no longer calls for heat.
11
The main and pilot valves close.
12
The fan time delay relay remains closed,
keeping the fan operating to dissipate
residual heat from the heat exchanger. At
this time, the fan time delay relay opens
and deactivates the fan motor.
NOTE:This unit is equipped with a
blocked vent shutoff (spill) switch. If the
venting system becomes blocked or
there is continuous spillage, the vent
shutoff switch will shut off the unit
heater.
*See Fan Controls on page 27.
• Caution - Disconnect power before
servicing.
• Unit must be grounded.
• Use copper conductors only.
• If any of the original wire as supplied
with the appliance must be replaced, it
must be replaced with wiring material
having a temperature rating of at least
125°C.
• Hi-limit and blocked vent (spill) wires
minimum 200°C.
• Refer to installation instructions for
venting, gas piping and start-up
procedures.
• - - - Indicates Field Wiring.
• ___ Indicates Factory Wiring.
30
UH-PRC002-EN
Electric
Power
Hydraulic Modulating Control
With power applied to the unit:
1
The thermostat calls for heat. NOTE: If a
thermostat is not supplied, steps 2
through 5 will be constant as long as
power is applied to the unit.
2
The pilot valve opens.
3
The ignitor sparks continuously to ignite
the pilot.
4
The sensor proves pilot ignition and
shuts off the ignitor.
5
With the pilot lit, the main electric gas
valve opens. At this time, the fan time
delay (optional on duct furnaces) is
energized.The fan time delay relay
closes and activates the fan motor.
NOTE:The unit firing is controlled by the
hydraulic sensing bulb on the
mechanical valve.The mechanically
operated valve (not illustrated) is in
series with the single-stage electrically
operated valve.
6
The hydraulic sensing bulb, on the
mechanical modulating valve, calls for
heat.
7
The mechanical modulating valve opens
allowing gas flow to the main burners.
Main burners are lit at 50 percent of the
unit’s rated input.The mechanical
modulating valve modulates between 50
percent and 100 percent of firing rate
depending on the temperature rise
required.
8
The unit continues to fire until the
hydraulic sensing bulb is satisfied and
no longer calls for heat.
9
The mechanical modulating valve closes
which shuts off the main gas supply to
the burners.
10
The room thermostat is satisfied and no
longer calls for heat.The main and pilot
valves closes. At this time the fan time
delay relay opens and deactivates the
fan motor.
NOTE:This unit is equipped with a
blocked vent shutoff (spill) switch. If the
venting system becomes blocked or
there is continuous spillage, the vent
shutoff switch will shut off the unit
heater.
• Caution - Disconnect power before
servicing.
• Unit must be grounded.
• Use copper conductors only.
• If any of the original wire as supplied
with the appliance must be replaced, it
must be replaced with wiring material
having a temperature rating of at least
125°C.
• Hi-limit and blocked vent (spill) wires
minimum 200°C.
• Refer to installation instructions for
venting, gas piping and start-up
procedures.
• - - - Indicates Field Wiring.
• ___ Indicates Factory Wiring.
UH-PRC002-EN
31
Electric
Power
Sequence of Operation
Hydraulic Modulating Control
With Bypass
With power applied to the unit:
1
The thermostat calls for heat. NOTE: If a
thermostat is not supplied, steps 2
through 5 will be constant as long as
power is applied to the unit.
2
The pilot valve opens.
3
The ignitor sparks continuously to ignite
the pilot.
4
The sensor proves pilot ignition and
shuts off the ignitor.
5
With the pilot lit, the main electric gas
valve opens. At this time, the fan time
delay (optional on duct furnaces) is
energized.The fan time delay relay
closes and activates the fan motor.
NOTE:The unit firing is controlled by the
hydraulic sensing bulb on the
mechanical valve.The mechanically
operated valve (not illustrated) is in
series with the single-stage electrically
operated valve.
6
The unit is equipped with a bypass
manifold containing a single-stage
electric valve which is in parallel with the
hydraulic modulating gas valve.The
bypass is activated by a thermostat and
overrides the hydraulic control.The
override thermostat should be a remote
room thermostat. If the temperature falls
below the override thermostat’s setpoint
the thermostat opens the bypass valve,
and the unit operates at full fire.The unit
will continue at full fire until the override
thermostat is satisfied and no longer
calls for heat, at which point the bypass
32
valve is closed.The unit is again
controlled by the hydraulic sensing bulb
on the mechanical valve.
7
The hydraulic sensing bulb on the
mechanical valve calls for heat.
8
The mechanical modulating valve opens
allowing gas flow to the main burners.
Main burners are lit at 50 percent of the
unit’s rated input.The mechanical
modulating valve modulates between 50
percent and 100 percent of firing rate,
depending on the temperature rise
required.
9
The unit continues to fire until the
hydraulic sensing bulb is satisfied and
no longer calls for heat.
10
The mechanical modulating valve closes
shutting off the main gas supply to the
burners.
11
The room thermostat is satisfied and no
longer calls for heat.The main and pilot
valves closes. At this time the fan time
delay relay opens and deactivates the
fan motor.
UH-PRC002-EN
Electric
Power
Sequence of Operation
Hydraulic Modulating Control With Bypass
LINE IN 115V/1/60
L2
L2
L1
L1
BLOWER
MOTOR
B
FAN TIME DELAY
DISCONNECT
BLACK
W
K5
DRAFTOR
HTR
BLACK
B
SUMMER/WINTER SWITCH
S
DRAFTOR WIRING FOR
POWER VENTED UNITS
L1
L2
LINE TO
24V XFORMER
50 VA
1
1
24
VOLTS
2
2
FAN TIME DELAY
DL
FURNACE ONE HIGH LIMIT
R1
1
2
DL
W1
V
DRAFTOR
END SW
58600 IGNITOR
MV SOL.
MV
MV/PV
PV SOL.
PV
GND
24V (GND)
2
BLKQ
VENT
1
DRAFTOR ONE
24V (HOT)
SPARK
2
K5
2
V
DL
IGN
W1
1
1
OVERRIDE STAT
R
BY1
BYPASS SOL.
W
THERMOSTAT
OR DUCTSTAT
R
UH-PRC002-EN
W/B
33
Electric
Power
Sequence of Operation
Electronic Modulating Control
(with duct thermostat)
With power applied to the unit:
1
The thermostat calls for heat.
2
The pilot valve opens.
3
The ignitor sparks continuously to ignite
the pilot.
4
The sensor proves pilot ignition and
shuts off the ignitor.
5
With the pilot lit, the gas valve opens.
6
Main burners are lit at 100 percent of
unit’s rated input.
7
The fan time delay relay (optional on
duct furnaces) allows the heat exchanger
to come up to operating temperature. At
this time, the fan time delay relay closes
and activates the fan motor.
8
The unit is controlled by the duct
thermostat which modulates the unit
from 100 to 50 percent of unit’s rated
input. An amplifier receives a small
electrical signal from the thermostat and
converts this into a working voltage. This
working voltage determines the position
of the modulating valve. With no voltage
applied to the valve, the valve will be full
open and full fire will occur. As
increasing voltage is applied to the valve,
the valve will modulate closed. At
approximately 12V dc, the valve will
be at its minimum low fire position. If the
voltage continues to increase, indicating
a further reduction in the unit’s firing is
required, the increased voltage closes a
relay which closes the automatic gas
valve. As temperature drops, the voltage
also drops causing the relay to re-open
the valve.The unit will continue to cycle
in this manner until either an increase in
the unit’s firing rate is required or the
thermostat is satisfied and no longer
calls for heat.
34
9
When the thermostat is satisfied, the
main and pilot valves close.
10
The fan time delay relay (optional on
duct furnaces) remains closed keeping
the fan motor operating to dissipate
residual heat from the heat exchanger. At
this time, the fan time delay relay opens
and deactivates the fan motor.
11
If optional room override thermostat is
ordered…when setpoint is reached, it
will cause the unit to go to full-fire,
overriding both the duct sensor and the
remote setpoint adjustment.
**NOTE: Sensor and selector wires to
amplifier must not be run close to, or in
conduit with, power or ignition wires.
UH-PRC002-EN
Electric
Power
Sequence of Operation
Electronic Modulating Control
(with duct thermostat)
LINE IN 115V/1/60
L2
L2
L1
L1
BLOWER
MOTOR
8
FAN TIME DELAY
DISCONNECT
BLACK
SUMMER/WINTER SWITCH
W
K5
DRAFTOR
HTR
BLACK
8
S
DRAFTOR WIRING FOR
POWER VENTED UNITS
L2
L1
LINE
24V XFORMER
50 VA
1
1
2
2
FAN TIME DELAY
DL
FURNACE ONE HIGH LIMIT
1
24
VOLTS
R1
3
2
DL
W1
V
DRAFTOR
END SW
58600 IGNITOR
MV SOL.
MV
MV/PV
PV SOL.
PV
GND
24V (GND)
2
BLKD.
VENT
1
2
24V (HOT)
SPARK
K5
2
V
MAXITROL
TS121 TD121
W/ DUCT SENSING
1
4
5
t˚
7
3
14
MR1
DRAFTOR ONE
2
IGN
W1
DL
1
1
1
9
10
8
11
ONE
USE
HR VALVE
A1010 FOR
PER
SINGLE FUNACE
FURNACE
A1011 FOR
SECTION MULTIPLE FURNACE
2
UH-PRC002-EN
35
Electric
Power
Sequence of Operation
Electronic Modulating Control
(with room thermostat)
With power applied to the unit:
1
The thermostat calls for heat.
2
The pilot valve opens.
3
The ignitor sparks continuously to ignite
the pilot.
4
The sensor proves pilot ignition and
shuts off the ignitor.
5
With the pilot lit, the gas valve opens.
6
Main burners are lit at 100 percent of
unit’s rated input.
7
The fan time delay relay (optional on
duct furnaces) allows the heat exchanger
to come up to operating temperature. At
this time, the fan time delay relay closes
and activates the fan motor.
36
8
The unit is controlled by the electronic
thermostat which modulates the unit
from 100 to 50 percent of unit’s rated
input. An amplifier receives a small
electrical signal from the thermostat and
converts this into a working voltage.This
working voltage determines the position
of the modulating valve. With no voltage
applied to the valve, the valve will be full
open and full fire will occur. As
increasing voltage is applied to the valve,
the valve will modulate closed. At
approximately 12V dc, the valve will
be at its minimum low fire position. If the
voltage continues to increase, indicating
a further reduction in the unit’s firing is
required, the increased voltage closes a
relay which closes the automatic gas
valve. As temperature drops, the voltage
also drops causing the relay to re-open
the valve.The unit will continue to cycle
in this manner until either an increase in
the unit’s firing rate is required or the
thermostat is satisfied and no longer
calls for heat.
9
When the room thermostat is satisfied,
the main and pilot valves close.
10
The fan time delay relay (optional on
duct furnaces) remains closed keeping
the fan motor operating to dissipate
residual heat from the heat exchanger. At
this time, the fan time delay relay opens
and deactivates the fan motor.
UH-PRC002-EN
Electric
Power
Sequence of Operation
Electronic Modulating Control
(with room thermostat)
L2
LINE IN 115V/1/60
L2
L1
L1
BLOWER
MOTOR
8
FAN TIME DELAY
DISCONNECT
8
SUMMER/WINTER SWITCH
S
W
L2
L1
BLACK
K5
BLACK
1
1
DL
R1
3
2
2
FAN TIME DEALY
DL
FURNACE ONE HIGH LIMIT
1
24
VOLTS
DRAFTOR
MTR
115V TO
24V XFORMER
50 VA
2
W1
DRAFTOR ONE
K5
V
58600 IGNITOR
MV SOL.
MV
MV/PV
PV SOL.
PV
GND
24V (GND)
2
PRESS. SW.
24V (HOT)
SPARK
MR1
3
T107A
TSTAT
V
2
IGN
W1
DL
1
1
MAXITROL
W/ROOM SENSING
4
1
3
7
5
9
7
1
9
10
8
11
ONE
USE
HR VALVE
A1010 FOR
PER
SINGLE FURNACE
FURNACE
A1011 FOR
SECTION MULTIPLE FURNACE
2
2
UH-PRC002-EN
37
Electric
Power
High-Efficiency Units
6
The sensor proves pilot ignition and
shuts off the ignitor.
7
With the pilot lit, the main gas valve
opens.
8
Main burners are lit at 100 percent of the
unit’s rated input.
9
The fan time delay relay allows the
heater to come up to operating
temperature. At this time, the fan time
delay relay closes and activates the fan
motor.
10
The unit continues to fire until the
thermostat is satisfied and no longer
calls for heat.
11
The main and pilot valve close.
12
The pressure switch opens and
deactivates the flue vent fan.
13
The fan time delay relay remains closed,
keeping the fan operating to dissipate
residual heat from the heat exchanger. At
this time, the fan time delay relay opens
and deactivates the fan motor.
NOTE: On duct furnaces, the fan motor
and associated controls shown in the
wiring diagrams are not integral to the
unit. It is essential, however, that the air
handling system be interlocked with the
duct furnace to prevent duct furnace
operation without airflow.
Single-Stage Control
With power applied to the unit:
1
The thermostat calls for heat.
2
The pressure switch measures the flow
through the vent system and energizes
the intermittent pilot when the flow is
correct. CAUTION:THE PRESSURE
SWITCH MUST NOT BE BYPASSED.
THE UNIT MUST NOT BE FIRED UNLESS
THE FLUE VENT FAN IS OPERATING. If
this procedure is not followed, there may
be a gas buildup that could cause an
explosion.
3
The pressure switch closes and activates
the flue vent fan.
4
The pilot valve opens.
5
The ignitor sparks continuously to ignite
the pilot.
L2
LINE IN
115-240/1/60
L1
L1
TIME DELAY
L1
SUMMER
8
BLOWER
MOTOR
L2
WINTER
RELAY 1
L1
• Caution - Disconnect power before
servicing.
• Unit must be grounded.
• Use copper conductors only.
• If any of the original wire as supplied
with the appliance must be replaced, it
must be replaced with wiring material
having a temperature rating of at least
125°C.
• Hi-limit and blocked vent (spill) wires
minimum 200°C.
• Refer to installation instructions for
venting, gas piping and start-up
procedures.
• - - - Indicates Field Wiring.
• ___ Indicates Factory Wiring.
38
DRAFTOR
MTR.
1
R
THERMOSTAT
R
W
HIGH LIMIT
W
1
3
2
2
L2
T1
115-240/24V
50VA
DRAFTOR
PRESS. SW.
58600
IGNITOR
MV
MV SOL.
MV/PV
PV SOL.
PV
GND
24V (GND)
24V (HOT)
SPARK
IGN
RELAY 1
R
TIME DELAY
TD
UH-PRC002-EN
Electric
Power
Separated Combustion Units
Single-Stage Control
With power applied to the unit:
1
The thermostat calls for heat.
2
The pressure switch measures the
pressure differential between the air inlet
and exhaust vent systems. If the
differential is correct, the intermittent
pilot ignition is energized. CAUTION:THE
PRESSURE SWITCH MUST NOT BE
BYPASSED.THE UNIT MUST NOT BE
FIRED UNLESSTHE FLUE VENT FAN IS
OPERATING.
3
When the pressure switch is closed, the
power venter motor is energized.
4
The pilot valve opens.
5
The ignitor sparks continuously to ignite
the pilot.
6
The sensor proves pilot ignition and
shuts off the ignitor.
7
With the pilot lit, the main gas valve
opens.
8
Main burners are lit at 100 percent of the
unit’s rated input.
9
The fan time delay relay allows the
heater to come up to operating
temperature. At this time, the fan time
delay relay closes and activates the fan
motor.
10
The unit continues to fire until the
thermostat is satisfied and no longer
calls for heat.
11
The main and pilot valve close.
12
The pressure switch opens and
deactivates the flue vent fan.
13
The fan time delay relay remains closed,
keeping the fan operating to dissipate
residual heat from the heat exchanger. At
this time, the fan time delay relay opens
and deactivates the fan motor.
8
FAN TIME DELAY
L1
L1
BLOWER/FAN
MOTOR
L2
LINE IN 115/1/60
L2
MTR
DISCONNECT
DRAFTOR
MOTOR
BLACK
W
MTR
S
L2
L1
1
K5
BLACK
8
SUMMER/WINTER SWITCH
1
LINE TO
24V XFORMER
50 VA
24
VOLTS
2
2
FAN TIME DELAY
DL
DL
HIGH LIMIT 1
R1
3
2
1
W1
DRAFTOR ONE
UH-PRC002-EN
K5
V
58600 IGNITOR
MV
MV SOL.
MV/PV
PV SOL.
PV
GND
24V (GND)
2
PRESS. SW.
1
1
W1
DL
V
2
• Caution - Disconnect power before
servicing.
• Unit must be grounded.
• Use copper conductors only.
• If any of the original wire as supplied
with the appliance must be replaced, it
must be replaced with wiring material
having a temperature rating of at least
125°C.
• Hi-limit and blocked vent (spill) wires
minimum 200°C.
• Refer to installation instructions for
venting, gas piping and start-up
procedures.
• - - - Indicates Field Wiring.
• ___ Indicates Factory Wiring.
24V (HOT)
SPARK
IGN
T/D STAT
R
W/B
39
Electric
Power
Separated Combustion Units
Single-Stage Control
Electronic Modulating 4-20 mA/0-10 VDC
Input
Table EP-1 — Motor Electrical Data — Centrifugal Fan
Current
Characteristics
115/60/1
230/60/1
208/60/3
230/60/3
460/60/3
¼hp
5.0
2.5
NR
NR
NR
1/3hp
5.9
3.3
NR
NR
NR
Full Load Amps*
½hp
7.2
3.9
2.7
2.4
1.2
¾hp
11.0
5.5
3.1
2.8
1.4
1hp
14.0
7.0
4.0
3.6
1.8
*FLA based on NEC ratings. All motors are 1725 rpm.
NR = Motor available, but not rated by NEC.
Table EP-2 — Motor Electrical Data — Horizontal Blower
Current
Characteristics
115/60/1
230/60/1
208/60/3
230/60/3
460/60/3
Motor wt. (LB)
½hp
5.9
3.3
NR
NR
NR
18
½hp
7.2
3.9
2.7
2.4
1.2
33
¾hp
11.0
5.5
3.1
2.8
1.4
33
1hp
14.0
7.0
4.0
3.6
1.8
36
Full Load Amps*
1½hp
2hp
16.4
24.6
8.2
12.3
4.9
6.4
4.4
5.8
2.2
2.9
39
40
3hp
34.0
17.0
9.2
8.6
4.3
44
*FLA based on NEC ratings. All motors are 1,725 rpm.
NR = motor available, but not rated by NEC.
40
UH-PRC002-EN
Dimension and
Weights
Table DW-1 – High Efficiency Propeller Fan Gas Unit Heater Dimensional Data (in.) (mm)
Model
GHND/ GHND/
GHPD
GHPD
Unit Sizes
30
45
“A” Height to
25.75
25.75
Top of Unit
(654)
(654)
“B” Width Of Unit
14
14
(356)
(356)
“C” Height to Top
27.5
27.5
Of Hanger
(699)
(699)
“D” Depth to Rear
30.375 30.375
Of Housing
(772)
(772)
“E” Hanging
11
11
Distance Width
(279)
(279)
“F” Discharge
10
10
Opening Width
(254)
(254)
“G” Depth to Unit
19.375 19.375
Side Jacket
(492)
(492)
“H” Discharge
16.25
16.25
Opening Height
(413)
(413)
“J” to Centerline
4
4
Of Flue
(102)
(102)
“K” Depth to
23.625 23.625
Centerline Of Flue
(600)
(600)
“L” Hanger Location
13.75
13.75
(349)
(349)
Flue Size Dia.-in.*
4
4
(102)
(102)
(Dia.-mm)
Fan Diameter in.
12
12
Gas Inlet-Natural Gas in.
0.5
0.5
Gas Inlet- LP Gas in.
0.5
0.5
Approx. Shipping wt.
(lb.)
79
94
(kg)
(36)
(43)
GHND/ GHND/ GHND/
GHPD
GHPD GHPD
60
75
100
25.75
25.75
31.25
(654)
(654)
(794)
17.5
17.5 17.875
(445)
(445)
(454)
27.5
27.5 34.125
(699)
(699)
(867)
30.375 30.375
37.5
(772)
(772)
(953)
16.5
16.5
14.5
(419)
(419)
(368)
15.5
15.5 15.375
(394)
(394)
(391)
19.375 19.375 26.75
(492)
(492)
(679)
16.25
16.25
18
(413)
(413)
(457)
5.75
5.75 5.872
(146)
(146)
(149)
23.625 23.625 30.625
(600)
(600)
(778)
13.5
13.5
16.25
(343)
(343)
(413)
4
4
4
(102)
(102)
(102)
14
14
14
0.5
0.5
0.5
0.5
0.5
0.5
109
(49)
119
(54)
174
(79)
GHND/
GHPD
125
31.25
(794)
20.625
(524)
34.125
(867)
37.5
(953)
17.25
(438)
18.125
(460)
26.75
(679)
18
(457)
7.25
(184)
30.625
(778)
16.75
(425)
4
(102)
16
0.5
0.5
197
(89)
GHND/
GHPD
150
36.25
(921)
20.625
(524)
39.125
(994)
37.5
(953)
17.25
(438)
18.125
(460)
26.75
(679)
18
(457)
7.25
(184)
30.625
(778)
16.375
(416)
4
(102)
16
0.5
0.5
219
(99)
GHND/
GHPD
175
36.25
(921)
23.375
(594)
39.125
(994)
37.5
(953)
20
(508)
20.875
(530)
26.75
(679)
18
(457)
8.625
(219)
30.625
(778)
16.375
(416)
4
(102)
18
0.5
0.5
GHND/
GHPD
200
36.25
(921)
26.125
(664)
39.125
(994)
37.5
(953)
22.75
(578)
23.625
(600)
26.75
(679)
18
(457)
10
(254)
30.625
(778)
16.375
(416)
5
(127)
18
0.5
0.5
GHND/
GHPD
225
36.25
(921)
28.875
(733)
39.125
(994)
37.5
(953)
25.5
(648)
26.375
(670)
26.75
(679)
18
(457)
11.25
(286)
30.625
(778)
16.75
(425)
5
(127)
18
0.75
½ or ¾
GHND/
GHPD
250
36.25
(921)
31.625
(803)
39.125
(994)
37.5
(953)
28.25
(718)
29.125
(740)
26.75
(679)
18
(457)
12.75
(324)
30.625
(778)
16.75
(425)
5
(127)
18
0.75
½ or ¾
GHND/
GHPD
300
36.25
(921)
37.125
(943)
39.125
(994)
37.5
(953)
33.75
(857)
34.625
(879)
26.75
(679)
18
(457)
15.5
(394)
30.625
(778)
16.75
(425)
6
(152)
(2) 16
0.75
½ or ¾
GHND/
GHPD
350
36.25
(921)
42.625
(1083)
39.125
(994)
37.5
(953)
39.25
(997)
40.125
(1019)
26.75
(679)
18
(457)
18.25
(464)
30.625
(778)
16.75
(425)
6
(152)
(2) 18
0.75
½ or ¾
GHND/
GHPD
400
36.25
(921)
48.125
(1222)
39.125
(994)
37.5
(953)
44.75
(1137)
45.625
(1159)
26.75
(679)
18
(457)
21
(533)
30.625
(778)
16.75
(425)
6
(152)
(2) 18
0.75
½ or ¾
238
(108)
249
(113)
275
(125)
305
(138)
350
(159)
414
(188)
461
(209)
1
*The flue opening on all “GH” units is 5 /8" diameter. Therefore a transition adapter is required by installer on these units.
Side View - 30 through 200
Side View - 225 through 400
Front View - 30 through 400
*Canadian units include vent cap and reducer/increaser (if required).
Dimensions in ( ) are in millimeters.
UH-PRC002-EN
41
Dimension and
Weights
Table DW-2 – High-Efficiency Centrifugal Fan Unit Heater Dimensional Data (in.) (mm)
Model
GBND/
GBPD
Unit Size
100
“A” Height to
31.25
Top of Unit
(794)
“B” Width
17.875
Of Unit
(454)
“C” Height to
34.125
Top of Hanger
(867)
“D” Depth to
42.625
Rear of Housing
(1083)
“E” Hanging
14.5
Distance Width
(368)
“F” Discharge
15.375
Opening Width
(391)
“J” To Centerline
5.875
Of Flue
(149)
“L” Hanger
16.375
Location
(416)
“M” Hanging
16.375
Distance Depth
(416)
Flue Size (Dia-in.) *
4
(Dia-mm)
(102)
Blower Size (in.)
9
Gas Inlet-Natural Gas (in.)
0.5
Gas Inlet- LP Gas (in.)
0.5
Approx. Shipping wt.
(lb.)
262
(kg)
(119)
GBND/
GBPD
125
31.25
(794)
20.625
(524)
34.125
(867)
44.25
(1124)
17.25
(438)
18.125
(460)
7.25
(184)
16.375
(416)
16.375
(416)
4
(102)
10
0.5
0.5
GBND/
GBPD
150
36.25
(921)
20.625
(524)
39.125
(994)
44.25
(1124)
17.25
(438)
18.125
(460)
7.25
(184)
16.375
(416)
16.375
(416)
4
(102)
10
0.5
0.5
GBND/
GBPD
175
36.25
(921)
23.375
(594)
39.125
(994)
47
(1194)
20
(508)
20.875
(530)
8.625
(219)
16.375
(416)
17.875
(454)
4
(102)
12
0.5
0.5
GBND/
GBPD
200
36.25
(921)
26.125
(664)
39.125
(994)
47
(1194)
22.75
(578)
23.625
(600)
10
(254)
16.375
(416)
17.875
(454)
5
(127)
12
0.5
0.5
GBND/
GBPD
225
36.25
(921)
28.875
(733)
39.125
(994)
51
(1295)
25.5
(648)
26.375
(670)
11.25
(286)
16.375
(416)
21.875
(556)
5
(127)
12
0.75
½ or ¾
GBND/
GBPD
250
36.25
(921)
31.625
(803)
39.125
(994)
51
(1295)
28.25
(718)
29.125
(740)
12.75
(324)
16.375
(416)
21.875
(556)
5
(127)
12
0.75
½ or ¾
GBND/
GBPD
300
36.25
(921)
37.125
(943)
39.125
(994)
48.25
(1226)
33.75
(857)
34.625
(879)
15.5
(394)
16.375
(416)
21.875
(556)
6
(152)
(2) 10
0.75
½ or ¾
GBND/
GBPD
350
36.25
(921)
42.625
(1083)
39.125
(994)
51
(1295)
39.25
(997)
40.125
(1019)
18.25
(464)
16.375
(416)
21.875
(556)
6
(152)
(2) 12
0.75
½ or ¾
GBND/
GBPD
400
36.25
(921)
48.125
(1222)
39.125
(994)
51
(1295)
44.75
(1137)
45.625
(1159)
21
(533)
16.375
(416)
21.875
(556)
6
(152)
(2) 12
0.75
½ or ¾
279
(127)
314
(142)
336
(152)
363
(165)
408
(185)
427
(194)
471
(214)
561
(254)
594
(269)
1
*The flue opening on all “GB” units is 5 /8" diameter. Therefore a transition adapter is required by installer on these units.
Side View - 100 through 200
Side View - 225 through 400
Front View - 100 through 400
*Canadian units include vent cap and reducer/increaser (if required).
Dimensions in ( ) are in millimeters.
42
UH-PRC002-EN
Dimension and
Weights
Table DW-3 – Separated Combustion – Propeller Fan Gas Unit Heater Dimensional Data (in.) (mm)
Model
GAND/
GAPD
Unit Size
100
“A” Height to
31.25
Top of Unit
(794)
“B” Height to
34.062
Top of Hanger
(865)
“C” Hanging
14.75
Distance Width
(375)
“D” Discharge
15.375
Opening Width
(391)
“E” Width
17.875
Of Unit
(454)
“F” To Centerline
5.875
Of Flue
(149)
Flue Size Dia.-in.
4
(Dia.-mm)
(102)
Fan Diameter (in.)
14
Gas Inlet-Natural Gas (in.)
0.5
Gas Inlet- LP Gas (in.)
0.5
Approx. Shipping wt.
(lb.)
200
(kg)
(91)
GAND/
GAPD
125
31.25
(794)
34.062
(865)
17.5
(445)
18.125
(460)
20.625
(524)
7.25
(184)
4
(102)
16
0.5
0.5
GAND/
GAPD
150
36.25
(921)
39.062
(992)
17.5
(445)
18.125
(460)
20.625
(524)
7.25
(184)
4
(102)
16
0.5
0.5
GAND/
GAPD
175
36.25
(921)
39.062
(992)
20.25
(514)
20.875
(530)
23.375
(594)
8.625
(219)
4
(102)
18
0.5
0.5
GAND/
GAPD
200
36.25
(921)
39.062
(992)
23
(584)
23.625
(600)
26.125
(664)
10
(254)
5
(127)
18
0.5
0.5
GAND/
GAPD
225
36.25
(921)
39.062
(992)
25.75
(654)
26.375
(670)
28.875
(733)
11.25
(286)
5
(127)
18
0.75
½ or ¾
GAND/
GAPD
250
36.25
(921)
39.062
(992)
28.5
(724)
29.125
(740)
31.625
(803)
12.75
(324)
5
(127)
18
0.75
½ or ¾
GAND/
GAPD
300
36.25
(921)
39.062
(992)
34
(864)
34.625
(879)
37.125
(943)
15.5
(394)
6
(152)
(2)16
0.75
½ or ¾
GAND/
GAPD
350
36.25
(921)
39.062
(992)
39.5
(1003)
40.125
(1019)
42.625
(1083)
18.25
(464)
6
(152)
(2)18
0.75
½ or ¾
GAND/
GAPD
400
36.25
(921)
39.062
(992)
45
(1143)
45.625
(1159)
48.125
(1222)
21
(533)
6
(152)
(2)18
0.75
½ or ¾
228
(103)
256
(116)
284
(129)
312
(142)
340
(154)
368
(167)
432
(196)
488
(221)
545
(247)
*The flue openings on all units are 5 1/8” diameter. Therefore, a transition adapter is required by installer on these units.
Front View - 100 through 400
Side View - 100 through 200
Side View - 225 through 400
NOTE: Air intake is round on 225/
250 units. For 300/400 units, air
intake is as shown.
*Canadian units include vent cap and reducer/increaser (if required).
Dimensions in ( ) are in millimeters.
UH-PRC002-EN
43
Dimension and
Weights
Table DW-4 – Separated Combustion – Centrifugal Fan Unit Heater Dimensional Data
Model
GKND/
GKPD
Unit Size
100
“A” Height toTop
31.25
Top of Unit
(794)
“B” Height to Top
34.062
Top of Hanger
(865)
“C” Hanging
14.75
Distance Width
(375)
“D” Discharge
15.375
Opening Width
(391)
“E” Width
17.875
Of Unit
(454)
“F” To Centerline
5.875
Of Flue
(149)
“G” Hanging
18.5
Distance Depth
(470)
“H” Depth to
42.75
Rear of Housing
(1086)
Flue Size (Dia-in.)
4
(Dia-mm)
(102)
Blower Size (in)
9
Gas Inlet-Natural Gas (in.)
0.5
Gas Inlet- LP Gas (in.)
0.5
Approx. Shipping wt.
(lb.)
298
(kg)
(135)
GKND/
GKPD
125
31.25
(794)
34.062
(865)
17.5
(445)
18.125
(460)
20.625
(524)
7.25
(184)
18.5
(470)
44.375
(1127)
4
(102)
10
0.5
0.5
GKND/
GKPD
150
36.25
(921)
39.062
(992)
17.5
(445)
18.125
(460)
20.625
(524)
7.25
(184)
18.5
(470)
44.375
(1127)
4
(102)
10
0.5
0.5
GKND/
GKPD
175
36.25
(921)
39.062
(992)
20.25
(514)
20.875
(530)
23.375
(594)
8.625
(219)
20
(508)
47.187
(1199)
4
(102)
12
0.5
0.5
GKND/
GKPD
200
36.25
(921)
39.062
(992)
23
(584)
23.625
(600)
26.125
(664)
10
(254)
20
(508)
47.187
(1199)
5
(127)
12
0.5
0.5
GKND/
GKPD
225
36.25
(921)
39.062
(992)
25.75
(654)
26.375
(670)
28.875
(733)
11.25
(286)
23
(584)
50.875
(1292)
5
(127)
12
0.75
½ or ¾
GKND/
GKPD
250
36.25
(921)
39.062
(992)
28.5
(724)
29.125
(740)
31.625
(803)
12.75
(324)
23
(584)
48
(1219)
5
(127)
12
0.75
½ or ¾
GKND/
GKPD
300
36.25
(921)
39.062
(992)
34
(864)
34.625
(879)
37.125
(943)
15.5
(394)
23
(584)
50.875
(1292)
6
(152)
(2) 10
0.75
½ or ¾
GKND/
GKPD
350
36.25
(921)
39.062
(992)
39.5
(1003)
40.125
(1019)
42.625
(1083)
18.25
(464)
23
(584)
50.875
(1292)
6
(152)
(2) 12
0.75
½ or ¾
GKND/
GKPD
400
36.25
(921)
39.062
(992)
45
(1143)
45.625
(1159)
48.125
(1222)
21
(533)
23
(584)
51
(1295)
6
(152)
(2) 12
0.75
½ or ¾
330
(150)
362
(164)
394
(179)
426
(193)
458
(208)
490
(222)
558
(253)
618
(280)
678
(308)
*The flue openings on all units are 51/8" diameter. Therefore, a transition adaptor is required by installer on these units.
Front View - 100 through 400
Side View - 100 through 200
Side View - 225 through 400
NOTE: Air intake is round on 225/250
units. For 300/400 units, air intake is
as shown.
*Canadian units include vent cap and reducer/increaser (if required).
Dimensions in ( ) are in millimeters.
44
UH-PRC002-EN
Dimension and
Weights
Table DW-5 – Propeller Fan Gas Unit Heater Dimensional Data (in.) (mm)
Model
GPND/
GPPD
30
25.75
(654)
14
(356)
“C” Height to
27.5
Top of Hanger
(699)
“D” Depth to
27.625
Rear of Housing
(702)
“E” Hanging
8.625
Distance Width
(219)
“F” Discharge
10
Opening Width
(254)
“G” Depth to Unit
19.375
Side Jacket
(492)
“H” Discharge
16.25
Opening Height
(413)
“L” Hanger
11.875
Location
(302)
“S” Flue Size (Dia-in.)
4
(Dia-mm) (102)
FlueType*
R,V
Fan Diameter (in.)
12
Gas Inlet-Natural Gas (in.) 0.5
Gas Inlet- LP Gas (in.)
0.5
Approx. Shipping wt.
(lb.)
72
(kg)
(33)
Net Unit wt.
(lb.)
59
(kg)
(27)
Unit Size
“A” Height to
Top of Unit
“B” Width of Unit
GPND/
GPPD
45
25.75
(654)
14
(356)
27.5
(699)
27.625
(702)
8.625
(219)
10
(254)
19.375
(492)
16.25
(413)
11.875
(302)
4
(102)
R,V
12
0.5
0.5
GPND/
GPPD
60
25.75
(654)
17.5
(445)
27.5
(699)
27.625
(702)
14.125
(359)
15.5
(394)
19.375
(492)
16.25
(413)
11.5
(292)
5
(127)
R,V
14
0.5
0.5
GPND/
GPPD
75
25.75
(654)
17.5
(445)
27.5
(699)
27.625
(702)
14.125
(359)
15.5
(394)
19.375
(492)
16.25
(413)
11.5
(292)
5
(127)
R,V
14
0.5
0.5
GPND/ GPND/ GPND/ GPND/
GPND/
GPPD
GPPD
GPPD
GPPD
GPPD
100
125
150
175
200
31.25
31.25
36.25
36.25
36.25
(794)
(794)
(921)
(921)
(921)
17.875 20.625 20.625 23.375
26.125
(454)
(524)
(524)
(594)
(664)
33.25 33.25
38.25
38.25
38.25
(845)
(845)
(972)
(972)
(972)
32.5
32.5
36
36
36
(826)
(826)
(914)
(914)
(914)
14.75
17.5
17.5
20.25
23
(375)
(445)
(445)
(514)
(584)
15.375 18.125 18.125 20.875 23.6256
(391)
(460)
(460)
(530)
(600)
26.75 26.75
26.75
26.75
26.75
(679)
(679)
(679)
(679)
(679)
18
18
18
18
18
(457)
(457)
(457)
(457)
(457)
15.125 15.125 15.125 15.125
15.125
(384)
(384)
(384)
(384)
(384)
6
6
7
7
8
(152)
(152)
(178)
(178)
(203)
R,V
R,V
R,H
R,H
R,H
14
16
16
18
18
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
82
(37)
98
(44)
104
(47)
178
(81)
200
(91)
209
(95)
232
(105)
69
(31)
84
(38)
90
(41)
148
(67)
168
(76)
175
(79)
196
(89)
GPND/
GPPD
225
36.25
(921)
28.875
(733)
39.125
(994)
38.25
(972)
25.5
(648)
26.375
(670)
26.75
(679)
18
(457)
16.25
(413)
8
(203)
R,H
18
0.75
½ or ¾
GPND/
GPPD
250
36.25
(921)
31.625
(803)
39.125
(994)
38.25
(972)
28.25
(718)
29.125
(740)
26.75
(679)
18
(457)
16.25
(413)
8
(203)
R,H
18
0.75
½ or ¾
GPND/
GPPD
300
36.25
(921)
37.125
(943)
39.125
(994)
37.75
(959)
33.75
(857)
34.625
(879)
26.75
(679)
18
(457)
16.25
(413)
10
(254)
OV,H
(2) 16
0.75
½ or ¾
GPND/
GPND/
GPPD
GPPD
350
400
36.25
36.25
(921)
(921)
42.625 48.125
(1083)
(1222)
39.125 39.125
(994)
(994)
38.25
38.25
(972)
(972)
39.25
44.75
(997)
(1137)
40.125 45.625
(1019)
(1159)
26.75
26.75
(679)
(679)
18
18
(457)
(457)
16.25
16.25
(413)
(413)
10
12
(254)
(305)
OV,H
OV,#
(2) 18
(2) 18
0.75
0.75
½ or ¾ ½ or ¾
242
(110)
279
(127)
301
(137)
356
(161)
415
(188)
451
(205)
216
(98)
239
(108)
261
(118)
304
(138)
340
(154)
376
(171)
*R – Round, OV – Oval. Refer to detail above for 400 MBh unit.
Side View - 30 through 200
Side View - 225 through 400
Front View - 30 through 400
Dimensions are in inches.
(Dimensions in parentheses are in mm.)
UH-PRC002-EN
45
Dimension and
Weights
Table DW-6 – Tubular Heat Exchanger Dimensional Data (in.) (mm)
Model
Unit Size
“A” Height toTop of Unit
“B” Height to Top of Hanger
“C” Overall Depth
Center Line Height of Flue
Center Line Electric Connection
“ F” Discharge Opening Height
“G” Fan Diameter-in.
Unit Weight
(lbs.)
(kgs.)
Shipping Weight
(lbs.)
(kgs.)
GTND/GTPD
003
12
(305)
13
(330)
25.5
(648)
7.25
(184)
10.25
(260)
10.5
(267)
10
GTND/GTPD
004
12
(305)
13
(330)
25.5
(648)
7.25
(184)
10.25
(260)
10.5
(267)
10
GTND/GTPD
006
17.75
(451)
18.75
(476)
26.75
(679)
10.5
(267)
16
(406)
16.25
(413)
16
GTND/GTPD
007
17.75
(451)
18.75
(476)
26.75
(679)
10.5
(267)
16
(406)
16.25
(413)
16
GTND/GTPD
009
17.75
(451)
18.75
(476)
26.75
(679)
10.5
(267)
16
(406)
16.25
(413)
16
62
(28)
68
(31)
87
(39)
93
(42)
93
(42)
72
(33)
78
(35)
102
(46)
108
(49)
108
(49)
Top View
Rear View
Side View
Front View
Dimensions are in inches.
(Dimensions in parentheses are in mm.)
46
UH-PRC002-EN
Dimension and
Weights
Table DW-7 – Tubular Heat Exchanger Unit Heater Dimensional Data (in.) (mm)
Models
GTND/GTPD
010
Input
MBh
100.0
012
125.0
015
150.0
017
175.0
020
200.0
025
250.0
A
33¾
(857)
33¾
(857)
33¾
(857)
33¾
(857)
33¾
(857)
33¾
(857)
B
20¾
(527)
20¾
(527)
20¾
(527)
32¾
(831)
32¾
(831)
32¾
(831)
Rear View
C
133/8
(340)
133/8
(340)
133/8
(340)
193/8
(492)
193/8
(492)
193/8
(492)
D
11
(279)
11
(279)
11
(279)
11
(279)
11
(279)
11
(279)
E
185/8
(473)
185/8
(473)
185/8
(473)
305/8
(778)
305/8
(778)
305/8
(778)
F
18¾
(476)
18¾
(476)
18¾
(476)
30¾
(781)
30¾
(781)
30¾
(781)
G
4¾
(121)
4¾
(121)
4¾
(121)
4¾
(121)
4¾
(121)
4¾
(121)
H
24½
(622)
24½
(622)
24½
(622)
24½
(622)
24½
(622)
24½
(622)
Side View
L
25¼
(641)
25¼
(641)
25¼
(641)
37¼
(946)
37¼
(946)
37¼
(946)
Flue
Dia.
5
(127)
5
(127)
5
(127)
5
(127)
5
(127)
5
(127)
Fan
Dia
16
Gas
Inlet
Nat.
½
Gas
Inlet
LP
½
16
½
½
16
½
½
18
½
½
18
½
½
18
¾
½
Unit
Weight
lbs. (kg)
133
(60)
145
(66)
155
(70)
191
(87)
201
(91)
211
(96)
Shipping
Weight
lbs. (kg)
173
(78)
185
(84)
195
(88)
241
(109)
251
(114)
261
(118)
Front View
Dimensions are in inches.
(Dimensions in parentheses are in mm.)
UH-PRC002-EN
47
Dimension and
Weights
Table DW-8 – Tubular Heat Exchanger Unit Heater Dimensional Data (in.) (mm)
Models
GTND/GTPD
030
Input
MBh
300.0
035
350.0
040
400.0
A
34
(864)
34
(864)
34
(864)
B
50¾
(1289)
50¾
(1289)
50¾
(1289)
C
283/8
(721)
283/8
(721)
283/8
(721)
D
12¼
(311)
12¼
(311)
12¼
(311)
E
485/8
(1235)
485/8
(1235)
485/8
(1235)
F
48¾
(1238)
48¾
(1238)
48¾
(1238)
G
51/8
(130)
51/8
(130)
51/8
(130)
H
24½
(622)
24½
(622)
24½
(622)
L
55¼
(1403)
55¼
(1403)
55¼
(1403)
Flue
Dia.
6
(152)
6
(152)
6
(152)
Fan
Dia
(2) 16
Gas
Inlet
Nat.
¾
(2) 18
¾
(2) 18
¾
Gas
Inlet
LP
½ or
¾
½ or
¾
½ or
¾
Unit
Weight
lbs. (kg)
307
(139)
321
(145)
335
(152)
Shipping
Weight
lbs. (kg)
367
(166)
381
(173)
395
(179)
Rear View
Side View
Front View
Dimensions are in inches.
(Dimensions in parentheses are in mm.)
48
UH-PRC002-EN
Dimension and
Weights
Table DW-9 – Centrifugal Fan Gas Unit Heater Dimensional Data (in.) (mm)
Model
GCND/
GCPD
Unit Size
100
“A” Height toTop of Unit
31.25
(794)
“B” Width of Unit
17.875
(454)
“C” Height to Top of
33.25
Hanger
(845)
“D” Depth to Rear of
42.625
Housing
(1083)
“E” Hanging Distance
14.75
Width
(375)
“F” Discharge Opening 15.375
Width
(391)
“L” Hanger Location
15.125
(384)
M” Hanging Distance
24.625
Depth
(625)
“S” Flue Size Dia.
6
(152)
Flue Type *
R,V
Blower Size (in)
9
Gas Inlet - Natural Gas (in.) 0.5
Gas Inlet - LP Gas (in.)
0.5
Approx. Shipping wt.
(lb.)
253
(kg)
(115)
GCND/
GCPD
125
31.25
(794)
20.625
(524)
33.25
(845)
44.25
(1124)
17.5
(445)
18.125
(460)
15.125
(384)
25.875
(657)
6
(152)
R,V
10
0.5
0.5
GCND/
GCPD
150
36.25
(921)
20.625
(524)
38.25
(972)
44.25
(1124)
17.5
(445)
18.125
(460)
15.125
(384)
17.5
(445)
7
(178)
R,H
10
0.5
0.5
GCND/
GCPD
175
36.25
(921)
23.375
(594)
38.25
(972)
47
(1194)
20.25
(514)
20.875
(530)
15.125
(384)
19
(483)
7
(178)
R,H
12
0.5
0.5
GCND/
GCPD
200
36.25
(921)
26.125
(664)
38.25
(972)
47
(1194)
23
(584)
23.6256
(600)
15.125
(384)
19
(483)
8
(203)
R,H
12
0.5
0.5
GCND/
GCPD
225
36.25
(921)
28.875
(733)
38.25
(972)
51
(1295)
25.5
(648)
26.375
(670)
16.25
(413)
21.875
(556)
8
(203)
R,H
12
0.75
½ or ¾
GCND/
GCPD
250
36.25
(921)
31.625
(803)
38.25
(972)
51
(1295)
28.25
(718)
29.125
(740)
16.25
(413)
21.875
(556)
8
(203)
R,H
12
0.75
½ or ¾
GCND/
GCPD
300
36.25
(921)
37.125
(943)
38.25
(972)
48.25
(1226)
33.75
(857)
34.625
(879)
16.25
(413)
27.875
(708)
10
(254)
OV,H
(2) 10
0.75
½ or ¾
GCND/
GCPD
350
36.25
(921)
42.625
(1083)
38.25
(972)
51
(1295)
39.25
(997)
40.125
(1019)
16.25
(413)
28.875
(733)
10
(254)
OV,H
(2) 12
0.75
½ or ¾
GCND/
GCPD
400
36.25
(921)
48.125
(1222)
38.25
(972)
51
(1295)
44.75
(1137)
45.625
(1159)
16.25
(413)
28.875
(733)
12
(305)
OV,#
(2) 12
0.75
½ or ¾
270
(122)
315
(143)
335
(152)
351
(159)
396
(180)
415
(188)
459
(208)
550
(249)
582
(264)
* R = Round, OV = Oval. Refer to Detail A above for 400 MBh unit.
Side View -100 through 200
Side View - 225 through 400
Front View - 100 through 400
*Discharge opening for optional Duct Flange Assembly.
Dimensions in ( ) are in millimeters.
UH-PRC002-EN
49
Dimension and
Weights
Table DW-10 – Dimensional Data — Standard Duct Furnaces (in.) (mm)
Models
GDND/
GDPD
010
Input
MBh
100
012
125
015
150
017
175
020
200
022
225
025
250
030
300
035
350
040
400
A
17.875
(454)
20.625
(524)
20.625
(524)
23.375
(594)
26.125
(664)
28.875
(733)
31.625
(803)
37.125
(943)
42.625
(1083)
48.125
(1222)
B
15.5
(394)
18.25
(464)
18.25
(464)
21
(533)
23.75
(603)
26.5
(673)
29.25
(743)
34.75
(883)
40.25
(1022)
45.75
(1162)
C
17.125
(435)
19.875
(505)
19.875
(505)
22.625
(575)
25.375
(645)
28.125
(714)
30.875
(784)
36.375
(924)
41.875
(1064)
47.375
(1203)
F
23.875
(606)
26.625
(676)
26.625
(676)
29.375
(746)
32,125
(816)
34.875
(886)
37.625
(956)
43.125
(1095)
48.265
(1235)
54.125
(1375)
Gas Inlet
S
Nat.
6 RV
0.5
(152) RV
6 RV
0.5
(152) RV
7 RH
0.5
(178) RH
7 RH
0.5
(178) RH
8 RH
0.5
(203) RH
8 RH
0.75
(203) RH
8 RH
0.75
(203) RH
10 OVH
0.75
(254)OVH
10 OVH
0.75
(254) ORH
12 OVH
0.75
(305) OVH
Weight
LP
0.5
0.5
0.5
0.5
0.5
½ or ¾
½ or ¾
½ or ¾
½ or ¾
½ or ¾
lb. (kg)
162
(73)
175
(79)
186
(84)
205
(93)
221
(100)
243
(110)
252
(113)
301
(137)
378
(171)
392
(178)
R = Round, OV = Oval, H = Horizontal, V = Vertical
Side View - 100 through125 Front View - 100 through 400
Side View - 100 through125
50
Front View - 100 through 400
Side View - 150 through 400
Side View - 150 through 400
400 Vent Horizontal Alternate 400 Vent Special
UH-PRC002-EN
Dimension and
Weights
Table DW-11 – High Efficiency Duct Furnace (in.) (mm)
Detail G
Positions - Front Rear - Right - Left
Side View - 100 through 125
Models
GLND/
GLPD
010
Input
MBh
100
012
125
015
150
017
175
020
200
022
225
025
250
030
300
035
350
040
400
A
17.875
(454)
20.625
(524)
20.625
(524)
23.375
(594)
26.125
(664)
28.875
(733)
31.625
(803)
37.125
(943)
42.625
(1083)
48.125
(1222)
B
15.5
(394)
18.25
(464)
18.25
(464)
21
(533)
23.75
(603)
26.5
(673)
29.25
(743)
34.75
(883)
40.25
(1022)
45.75
(1162)
C
17.125
(435)
19.875
(505)
19.875
(505)
22.625
(575)
25.375
(645)
28.125
(714)
30.875
(784)
36.375
(924)
41.875
(1064)
47.375
(1203)
D (Dia.)
4
(102)
4
(102)
4
(102)
4
(102)
5
(127)
5
(127)
5
(127)
6
(152)
6
(152)
6
(152)
F
23.875
(606)
25.625
(651)
26.625
(676)
29.375
(746)
32.125
(816)
34.875
(886)
37.625
(956)
43.125
(1095)
48.625
(1235)
54.125
(1375)
Side View - 100 through125 Front View - 100 through 400
Front View - 100 through 400
Gas Inlet
Nat.
½
LP
½
½
½
½
½
½
½
½
½
¾
½ or ¾
¾
½ or ¾
¾
½ or ¾
¾
½ or ¾
¾
½ or ¾
Weight
lb. (kg)
173
(78)
186
(84)
197
(89)
216
(98)
232
(105)
254
(115)
263
(119)
312
(142)
389
(176)
403
(183)
Side View - 150 through 400
Side View - 150 through 400
*Canadian units include vent cap and reducer/increaser (if required).
Rear vent position shown. See Detail G for optional top vent position.
Dimensions in ( ) are in millimeters.
UH-PRC002-EN
51
Dimension and
Weights
Table DW-12 – Separated Combustion Indoor Gas Duct Furnace (in.) (mm)
Models
GMND/GMPD
Input
MBh
010
100
012
125
015
150
017
175
020
200
022
225
025
250
030
300
035
350
040
400
A
17 7/8
(454)
20 5/8
(524)
20 5/8
(524)
23 3/8
(594)
26 1/8
(664)
28 7/8
(733)
31 5/8
(803)
37 1/8
(943)
42 5/8
(1083)
48 1/8
(1222)
B
15 ½
(394)
18 ¼
(464)
18¼
(464)
21
(533)
23 ¾
(603)
26½
(673)
29¼
(743)
34¾
(883)
40 ¼
(1022)
45¾
(1162)
C
17 1/8
(435)
19 7/8
(505)
19 7/8
(505)
22 5/8
(575)
25 3/8
(645)
28 1/8
(714)
30 7/8
(784)
36 3/8
(924)
41 7/8
(1064)
47 3/8
(1203)
D(Dia)*
4
(102)
4
(102)
4
(102)
4
(102)
5
(127)
5
(127)
5
(127)
6
(152)
6
(152)
6
(152)
Gas Inlet
NAT.
LP
½
½
½
½
½
½
½
½
½
½
¾
½ or ¾
¾
½ or ¾
¾
½ or ¾
¾
½ or ¾
¾
½ or ¾
Weight
lb.
(kg)
161
(73)
180
(82)
188
(85)
207
(94)
227
(103)
246
(112)
266
(121)
305
(138)
344
(156)
383
(174)
Note:
*“D” diameter equals the air inlet opening and the flue discharge opening.
100 through 250
300 through 400
†Oval connector shown accepts 6” Dia. (152) pipe.
*Canadian units include vent cap and reducer/increaser (if required).
Rear vent position shown. See Detail G for optional top vent position.
Dimensions in ( ) are in millimeters.
52
UH-PRC002-EN
Dimension and
Weights
Table DW-13 – Horizontal Blower Assembly Dimension Data (in.) (mm)
Model
No.
HBAC-15
Nominal
cfm
1500
HBAC-20
2000
HBAC-30
HBAC-45
3000
4500
Duct Furnace
Size Used with
(Input-MBh)
A
100
65-½
(1664)
125
65-½
(1664)
150
65-½
(1664)
175
65-½
(1664)
200
65-½
(1664)
225
65-½
(1664)
250
65-½
(1664)
300
65-½
(1664)
350
69-½
(1765)
400
69-½
(1765)
B
26
(660)
26
(660)
26
(660)
26
(660)
40-½
(1029)
40-½
(1029)
40-½
(1029)
60-½
(1537)
60-½
(1537)
60-½
(1537)
C
10
(254)
10
(254)
10
(254)
10
(254)
10
(254)
10
(254)
10
(254)
10
(254)
14
(356)
14
(356)
D
18
(457)
18
(457)
18
(457)
18
(457)
18
(457)
18
(457)
18
(457)
18
(457)
22
(559)
22
(559)
E
21-¼
(540)
21-¼
(540)
21-¼
(540)
21-¼
(540)
35-¾
(908)
35-¾
(908)
35-¾
(908)
55-¾
(1416)
55-¾
(1416)
55-¾
(1416)
F
15-¾
(400)
15-¾
(400)
15-¾
(400)
15-¾
(400)
30-3/8
(772)
30-3/8
(772)
30-3/8
(772)
50-3/8
(1280)
50-3/8
(1280)
50-3/8
(1280)
G
15-5/8
(397)
18-3/8
(467)
18-3/8
(467)
21-1/8
(537)
23-7/8
(606)
26-5/8
(676)
29-3/8
(746)
34-7/8
(886)
40-3/8
(1026)
45-7/8
(1165)
Filter Data
Size **
25 x 25 x 1
No.
Filter
Req’d.
1
25 x 25 x 1
1
25 x 25 x 1
1
25 x 25 x 1
1
25 x 20 x 1
2
25 x 20 x 1
2
25 x 20 x 1
2
25 x 20 x 1
3
25 x 20 x 1
3
25 x 20 x 1
3
Approx. Ship wt.
Less Motor
lb. (kg)
135
(61)
135
(61)
155
(70)
155
(70)
200
(91)
200
(91)
200
(91)
296
(134)
296
(134)
296
(134)
Note:
Nominal 4,500 cfm unit has two blowers driven by one motor.
*Transition designed for specific duct furnace referenced in the table above. Variations from standard will require field supplied transitions.
Dimensions in ( ) are in millimeters.
UH-PRC002-EN
53
Dimension and
Weights
Transition
Table DW-14 – Flue Vent Dimensional Data (Field Installed)
Unit Size Input MBh
30
(kW)
(8.8)
Heater To Ventor Draftor
1-¼
Orifice Size “0”
(32)
Normal
4
Flue Size “S”
(102)
Type: R-round, Ov-oval
R
Recommended Flue
3
Pipe Diameter
(76)
Maximum Length Of Run 100
ft. (m)
(30.5)
45
(13.2)
1-¼
(32)
4
(102)
R
4
(102)
100
(30.5)
60
(17.6)
1-¾
(44)
5
(127)
R
4
(102)
100
(30.5)
75
(22.0)
1-¾
(44)
5
(127)
R
4
(102)
100
(30.5)
100
(29.3)
2-1/8
(54)
6
(152)
R
4
(102)
100
(30.5)
125
(36.6)
2-15/16
(75)
6
(152)
R
4
(102)
100
(30.5)
150
(43.9)
2-½
(64)
7
(178)
R
4
(102)
100
(30.5)
175
(51.2)
3
(76)
7
(178)
R
4
(102)
100
(30.5)
200
(58.6)
3-¼
(83)
8
(203)
R
5
(127)
100
(30.5)
225
(65.9)
3-½
(89)
8
(203)
R
5
(127)
100
(30.5)
250
(73.2)
3-¾
(95)
8
(203)
R
5
(127)
100
(30.5)
300
(87.8)
4
(102)
10
(254)
OV
5
(127)
100
(30.5)
350
(102.5)
4
(102)
10
(254)
OV
5
(127)
100
(30.5)
400
(117.1)
4
(102)
12
(305)
OV
6
(152)
100
(30.5)
Notes:
1. Installer may choose to use five-inch where four-inch pipe is shown
2. Runs should be reduced as follows for listed accessories. Each 90° elbow-10 feet. Each 45° elbow-5 feet. Briedert cap or equivalent-10 feet.
3. Discharge of the flue vent fan is five inches. Therefore, a transition by the installer is required on 30 through 175 MBh and 400 MBh units.
On units 30-250 MBh, flue vent fan and adapter ship in the same box. On units over 250 MBh, flue vent fan and adapter ship in separate boxes.
Motors are 1/12th hp. 115V fans draw 2.2 amps. 208 and 230V fans draw 1.1 amps.
54
UH-PRC002-EN
Dimension and
Weights
Table DW-15 – Factory Installed Flue Vent Data (Standard on High Efficiency Units)
Unit Size
Input MBh
30
Flue Outlet
5 1/8”
Recommended Flue Size 4” R
Max. Length of Run-Feet1 50
45
5 1/8”
4” R
50
60
5 1/8”
4” R
50
75
5 1/8”
4” R
50
100
5 1/8”
4” R
50
125
5 1/8”
4” R
50
150
5 1/8”
4” R
50
175
5 1/8”
4” R
50
200
5 1/8”
5” R
50
225
5 1/8”
5” R
50
250
5 1/8”
5” R
50
300
5 1/8”
6” R
50
350
5 1/8”
6” R
50
400
5 1/8”
6” R
50
Notes:
1. Vent pipe equivalent length must not exceed 50 feet. Equivalent length is the total length of straight sections, plus 15 feet for each 90° elbow and 8 feet for each 45° elbow.
2. Horizontal vent pipes should be pitched downward 1/4-inch per foot toward the outlet for condensate drainage.
3. Motors are 1/20 hp. All fans are 115V and draw 1.5 amps.
Table DW-16 – Factory Installed Flue Vent Data (Standard on Separated Combustion Units)
Flue
Combustion Air
Unit Size
Input MBh
Flue Outlet
Recommended Flue Size
Max. Length of Run-Feet1
Combustion Air Inlet
Max. Length of Run-Feet1
30
5 1/8”
4” R
50
4” R
50
45
5 1/8”
4” R
50
4” R
50
60
5 1/8”
4” R
50
4” R
50
75
5 1/8”
4” R
50
4” R
50
100
5 1/8”
4” R
50
4” R
50
125
5 1/8”
4” R
50
4” R
50
150
5 1/8”
4” R
50
4” R
50
175
5 1/8”
4” R
50
4” R
50
200
5 1/8”
5” R
50
5” R
50
225
5 1/8”
5” R
50
5” R
50
250
5 1/8”
5” R
50
5” R
50
300
5 1/8”
6” R
50
6” OV
50
350
400
5 1/8” 5 1/8”
6” R 6” R
50
50
6”OV 6” OV
50
50
Notes:
1. Flue outlet or combustion air inlet pipe equivalent length must not less than 5 feet and must not exceed 50 feet. Equivalent length is the total length of straight sections, plus 15
feet for each 90° elbow and 8 feet for each 45° elbow.
2. Horizontal vent pipes should be pitched downward 1/4-inch per foot toward the outlet for condensate drainage.
3. Motors are 1/20 hp. All fans are 115V and draw 1.5 amps.
UH-PRC002-EN
55
Dimension and
Weights
30° Nozzle
60° Nozzle
90° Nozzle
Y-Splitter
Table DW-17 — Nozzle Dimensional Data Chart
Note:
30º, 60º and 90º nozzles are shipped unassembled with
bagged hardware and field assembling and
installation instruction sheet. The six (6) louvers and
louver springs are removed from the unit heaters and
transferred to the nozzles in the field.
Unit MBh 100
A
Inches
17.44
(kW)
(445)
B
Inches
15.368
(kW)
(391)
125
150
20.19
(513)
20.19
(513)
18.118
(460)
175
200
225
250
300
350
400
22.94
(583)
25.69
(653)
28.44
(722)
31.19
(792)
36.69
(932)
42.19
(1072)
47.69
(1211)
18.118 20.868
(460)
(530)
23.618
(600)
26.368
(670)
29.118
(740)
34.618
(879)
40.118
(1019)
45.618
(1159)
225
250
300
350
400
Table DW-18 — Y-Splitter Dimensional Data Chart
Unit MBh
Width
Inches
(kW)
Height
Inches
(kW)
Depth
Inches
(kW)
56
100
125
150
175
200
18(461)
7/8
20(527)
5/8
23(600)
3/8
26(671)
1/8
29(740)
5/8
34(880)
1/8
40(1019)
45-5/8
(1159)
21-1/8
(537)
21-1/8
(537)
21-1/8
(537)
21-1/8
(537)
21-1/8
(537)
21-1/8
(537)
21-1/8
(537)
21-1/8
(537)
21-1/8
(537)
11
(279)
11
(279)
11
(279)
11
(279)
13-1/8
(334)
13-1/8
(334)
15-1/8
(384)
20-5/8
(524)
20-5/8
(524)
3/8
15(391)
1/8
18(461)
1/8
21-1/8
(537)
11
(279)
UH-PRC002-EN
Mechanical
Specifications
High Efficiency Propeller and
Centrifugal Fan Gas Unit
Heaters
General
Units are completely factory assembled,
piped, wired, and test fired. All units are
AGA Certified and conform with the
latest ANSI Standards for safe and
efficient performance. Units are provided
with two-point suspension hangers on
propeller fan unit heaters and with fourpoint suspension hangers on centrifugal
fan unit heaters. All units are available
for operation on either natural or LP
(liquid propane) gas.
Casing
Casings are die-formed, 20-gauge
galvanized steel and finished in baked
enamel.The bottom panel is easily
removed to provide service access to the
burners, pilot and orifices.The pilot is
also accessible through a side panel
access plate. All units provided with
independently adjustable horizontal
louvers with stops to prevent total
closure.
Heat Exchanger
Standard heat exchanger construction
consists of seam welded 20-gauge
aluminized steel tubes and 18-gauge
aluminized steel headers.
The heat exchanger, burner and draft
hood assembly carry a non-prorated
warranty to be free from defective
material and workmanship for a period
of ten years from date of manufacture,
excluding loss due to misuse,
negligence, or corrosion by chemicals
precipitated in the air.
Burners
Burners are die-formed, corrosion
resistant aluminized steel, with stainless
steel port protectors. Port protectors
reduce scale or foreign matter from
obstructing the burner ports. Burners
individually removable for ease of
inspection and servicing. Each burner is
provided with an individually adjustable,
manually rotated air shutter adjustment.
UH-PRC002-EN
Fans
Fan blades are constructed of aluminum
with an aerodynamic contour. All fans
are dynamically balanced for quiet,
efficient operation and supplied with a
protective type fan guard. Rubber-inshear isolators provide isolation
between the fan/motor combination and
the unit heater casing.
All Motors
Standard motors are 115V, 60 Hz, single
phase, open drip-proof with built-in
thermal overload protection.
Optional Fan Unit Motors
All motors are 115V, 60 Hz, single phase
totally enclosed with built-in thermal
overload protection and permanently
lubricated bearings.
Controls
A factory installed junction box is
provided for all power connections.
Standard units are provided with a 24V
combination single stage redundant gas
valve, consisting of a combination pilot
solenoid valve, automatic electric gas
valve, pilot filter, pressure regulator, pilot
adjustment and manual shutoff. A flue
vent fan relay and combustion air
proving switch is also provided as
standard. Standard equipment includes
spark-ignited intermittent pilot system
with electronic flame supervision. A 24V
control transformer, high limit and fan
time delay relay are provided.The fan
time delay relay delays the fan start until
the heat exchanger reaches a
predetermined temperature. It also
allows the fan to operate after burner
shutdown, removing residual heat from
the heat exchanger.
Two-Stage Gas Valve
(N/A on 30-75 MBh units)
Provides two stages of heat. Ignition is at
low fire (50% of the furnaces rated input).
Requires the use of a two-stage
thermostat.
Hydraulic Modulating Gas Valve
(N/A on 30-75 MBh units)
Provides modulated heat output. Ignition
is at low fire (50% input) and discharge
temperature sensing bulb located in the
air stream modulates the gas input from
100% to 50% rated input. Provided with
an automatic electric valve in series
which cycles the unit in response to a
low voltage single-stage thermostat
(thermostat not included).
Hydraulic Modulating Gas Valve with
Bypass
(N/A on 30-75 MBh units)
An additional electric valve in parallel
bypasses the hydraulic modulating
valve, overriding the discharge
temperature sensing bulb, allowing full
fire. Requires the use of a separate
thermostat to control the electric valve.
Electronic Modulating Gas Valve (Natural
Gas Units Only)
(N/A on 30-75 MBh units)
Provides modulated heat output. Ignition
is at full fire (100 percent input), and
modulates the gas input from 100 to 50
percent rated input. Available for use
with room thermostat or duct thermostat
with remote setpoint adjustment. Duct
thermostat available with optional
override room thermostat which causes
the unit to go to full fire when the room
temperature falls below the override
room thermostat.
Electronic Modulating
4-20 mA/0-10VDC Input
Provides modulated heat output. Ignition
is at full fire (100 percent input), and
modulates the gas input from 100
percent to 40 percent rated input.
The modulating gas valve shall operate
in response to a 4-20 mA or a 0-10 VDC
input from an external DDC control.
Flue Vent Fan
Flue vent fan provides power venting.
Provided factory assembled to a sealed
flue collection chamber.The flue vent fan
is activated in response to a low voltage
(24V) single-stage thermostat (NOTE:
thermostat must be ordered.) A
combustion air pressure switch is
provided as standard to verify proper
powered vent flow prior to allowing the
gas valve to operate.
57
Mechanical
Specifications
Factory Installed Options
Field Installed Accessories
Heat Exchanger Options
High Gas Line Pressure Regulator
(Natural gas units only)
Reduces main gas line pressure to a
minimum of seven inches W.C.. Pressure
at the jobsite must be specified.The
regulator is selected to accommodate
that specific pressure.
Type 409 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 409
stainless steel.
Type 321 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 321
stainless steel. (Not available on 30, 45,
60 and 75 MBh units.)
Additional Options
Type 409 Stainless Steel Burners
(Not available on 30, 45, 60 and 75 MBh
units.)
Type 409 Stainless Steel Draft Diverter
(Not available on 30, 45, 60 and 75 MBh
units.)
Low voltage room thermostat, singlestage.
Low voltage room thermostat, singlestage with summer/winter switch.
Low voltage duct thermostat, singlestage.
Universal tamperproof guard for all
room thermostats.
Orifices for elevations over 2,000 feet
Low voltage room thermostat, twostage.
Summer/Winter Switch
Low voltage duct thermostat, two-stage.
Vertical Louvers
Room thermostat, electronic modulating
control.
Duct Discharge Flange
(Centrifugal fan units only) Provided in
lieu of louvers on units for use with field
ductwork.
OSHA Fan Guards – All Propeller Units
OSHA fan guards are available as a
factory installed or field installed option.
58
Thermostats
Duct thermostat, electronic modulating
control.
Override room thermostat, for use with
duct thermostat and electronic
modulating control.
Discharge Nozzles
Y Splitter
30° Downward (100-400 MBh only)
60° Downward (100-400 MBh only)
90° Downward (100-400 MBh only)
UH-PRC002-EN
Mechanical
Specifications
Separated Combustion
Centrifugal and Propeller Fan
Gas Unit Heaters
General
Units are completely factory assembled,
piped, wired, and test fired. All units are
AGA Certified, 80 percent efficient and
conform with the latest ANSI Standards
for safe and efficient performance. Units
are provided with two-point suspension
hangers on propeller fan unit heaters
and with four-point suspension hangers
on centrifugal fan unit heaters. Units are
available for operation on either natural
or LP (propane) gas. Standard terms and
conditions apply.
Casing
Casings are die-formed, 20-gauge
galvanized steel and finished in baked
enamel.The bottom panel is easily
removed to provide service access to the
burners, pilot and orifice. All units
provided with independently adjustable
horizontal louvers with stops to prevent
total closure.
Heat Exchanger
Standard heat exchanger construction
consists of seam welded 20-gauge
aluminized steel tubes and 18-gauge
aluminized steel headers.
Burners
Controls
Burners are die-formed, corrosion
resistant aluminized steel, with stainless
steel port protectors. Port protectors
prevent scale or foreign matter from
obstructing the burner ports. Burners
individually removable for ease of
inspection and servicing. Each burner is
provided with an individually adjustable,
manually rotated air shutter adjustment.
A factory installed junction box is
provided for all power connections.
Standard units are provided with a 24V
combination single-stage redundant gas
valve, consisting of a combination pilot
solenoid valve, automatic electric gas
valve, pilot filter, pressure regulator, pilot
adjustment and manual shutoff. A flue
vent fan relay and combustion air
proving switch is also provided as
standard. Standard equipment includes
spark-ignited intermittent pilot system
with electronic flame supervision. A 24V
control transformer, high limit and fan
time delay relay are provided.The fan
time delay relay delays the fan start until
the heat exchanger reaches a
predetermined temperature. It also
allows the fan to operate after burner
shutdown, removing residual heat from
the heat exchanger.
Fans
Propeller fan blades are constructed of
aluminum with an aerodynamic contour.
All fans are dynamically balanced for
quiet, efficient operation and supplied
with a protective type fan guard. Rubberin-shear isolators provide isolation
between the fan/motor combination and
the unit heater casing.
Centrifugal fan is belt driven with
adjustable pitch motor sheave. Motor
and fan are dynamically balanced for
quiet operation.
Centrifugal Unit Motors
Standard motors are 115V, 60 Hz, single
phase, open drip-proof with built-in
thermal overload protection. Optional
230/60/1 motors are available on all
units. Optional 208, 230, 460/60/3 motors
are available on 125 through 400 MBh
units.
All Motors
All motors are 115V, 60 Hz, single-phase
open drip-proof with built-in thermal
overload protection and permanently
lubricated bearings.
UH-PRC002-EN
Electronic Modulating
4-20 mA/0-10VDC Input
Provides modulated heat output. Ignition
is at full fire (100 percent input), and
modulates the gas input from 100
percent to 40 percent rated input.
The modulating gas valve shall operate
in response to a 4-20 mA or a 0-10 VDC
input from an external DDC control.
Flue Vent Fan
Flue vent fan provides power venting.
Provided factory assembled to a sealed
flue collection chamber.The flue vent fan
is activated in response to a low voltage
(24V) single-stage thermostat (NOTE:The
thermostat is not included with the gas
control option). A combustion air
pressure switch is provided as standard
to verify proper powered vent flow prior
to allowing the gas valve to operate.
59
Mechanical
Specifications
Factory Installed Options
Field Installed Accessories
Two-Stage Gas Valve
Provides two stages of heat. Ignition is at
low fire (50 percent of the furnaces rated
input). Requires the use of a two-stage
thermostat.
LP (Propane) to Natural Gas Conversion
Package
Heat Exchanger Options
Type 409 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 409
stainless steel.
High Gas Line Pressure Regulator
(Natural gas units only)
Reduces main gas line pressure to a
minimum of seven-inches W.C. Pressure
at the jobsite must be specified.The
regulator is selected to accommodate
that specific pressure.
Thermostats
Type 321 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 321
stainless steel.
Low voltage room thermostat, singlestage.
Additional Options
Low voltage duct thermostat, singlestage.
Type 409 Stainless Steel Burners
Type 409 Stainless Steel Draft Diverter
Low voltage room thermostat, singlestage with summer/winter switch.
Totally Enclosed Motor
Low voltage room thermostat, twostage.
Orifices for elevations over 2000 feet
Low voltage duct thermostat, two-stage.
Summer/Winter Switch
Universal tamperproof guard for all
room thermostats.
Vertical Louvers
Duct Discharge Flange
(Centrifugal fan units only) Provided in
lieu of louvers on units for use with field
ductwork.
OSHA Fan Guards
OSHA fan guards are available as a
factory installed or field installed option.
Discharge Nozzles
Y Splitter
30° Downward
60° Downward
90° Downward
Concentric Vent Terminals
Vertical Concentric Vent Kit
Kit includes 5” cap with special attached
non-recirculation disc, special 8” cap
with 5” hole and concentric vent box.
Horizontal Concentric Vent Kit
Kit includes 5” cap with special attached
non-recirculation disc, inlet air screen
and concentric vent box.
60
UH-PRC002-EN
Mechanical
Specifications
Tubular Heat Exchanger
Indoor Gas Unit
Unit is completely factory assembled,
piped, wired and test fired. Unit is AGA
and CGA certified, over 80 percent
thermal (combustion) efficient.These
propeller type units are provided with
aluminized tubular heat exchanger, inshot burner, hot surface pilot ignition,
individually adjustable and removable
louvers, 100 percent baked enamel
finish, 115/60/1 supply voltage,
removable access door on size 30 to
75 MBh, and hinged access control panel
on 100 to 400 MBh, power vented,
single-stage combination gas valve, twostage available on 100 to 400 MBh, 24V
control transformer and 115/60/1 volt fan
motor with internal overload protection.
The size 30 to 90 are available in low
profile design.
Residential Garage Certified
The GTNDR unit heaters are AGA and
CGA certified for installations in
residential garages. With this certification
and the low profile design, these GTNDR
models are ideal for residential garage,
commercial and industrial installations.
Tubular Heat Exchanger
Heat exchanger construction consists of
20-gauge aluminized steel.The tubular
design provides maximum and uniform
heat transfer.The low pressure drop
enables heated air to be evenly
distributed.The curved, non-welded
serpentine design, experiences less
thermally induced stress making it
highly durable for longer service life.
Venting
The tubular design is AGA/CGA certified
in accordance with
Categories I and III venting
requirements. Category I enables units
to be vented vertically with either single
or double wall venting material.
Category III allows for horizontal venting
utilizing single wall venting material.
This venting flexibility makes
installation easier and more cost
effective.
Control Accessibility
All controls are easily accessible with
ignition and fan controls located in one
centrally located control panel.The
removable door on size 30 to 75 MBh
and the hinged access door on the 100
400 MBh provide control isolation.
Motor –115V ODP
Motor is 115V, 60 Hz, single phase, open
drip-proof with built-in thermal overload
protection.
Optional Feature
Motor — 115V totally enclosed.
Motor is 115V, 60 Hz, single phase,
totally enclosed with built-in thermal
overload protection.
Warranty
The heat exchanger, flue collector and
burners are covered by a 10 year
warranty from the date of manufacture.
Cabinet
The cabinet is constructed of 20-gauge
cold rolled steel. All components are
individually electrostatically painted.
Hot Surface Pilot Ignition
This ignition is constructed of shock
resistant ceramic composite hot surface
element.This system does not permit
pilot gas to flow unless the hot surface
element is present and powered.The low
voltage hot surface element lights the
pilot quickly for fast heat delivery. All
wiring is 24V with no line voltage in the
burner area.
UH-PRC002-EN
61
Mechanical
Specifications
Propeller Fan Gas Unit Heater
Centrifugal Fan Gas Unit
Heater
Indoor Gas Duct Furnace
Heat Exchanger
Motors
Standard heat exchanger construction
consists of seam welded 20-gauge
aluminized steel tubes and 18-gauge
aluminized steel headers.
General
The heat exchanger, burner and draft
hood assembly carry a non-prorated
warranty to be free from defective
material and workmanship for a period
of 10 years from date of manufacture,
excluding loss due to misuse,
negligence, or corrosion by chemicals
precipitated in the air. (Not available on
duct furnaces.)
Standard motors are 115V, 60 Hz, singlephase, open drip-proof with built-in
thermal overload protection. Optional
230/60/1 motors are available on all
units. Optional 208, 230, 460/60/3 motors
are available on 125 through 400 MBh
units.
Units are completely factory assembled,
piped, wired and test fired. All units are
AGA Certified and conform with the
latest ANSI Standards for safe and
efficient performance. Units are provided
with two-point suspension hangers on
propeller fan unit heaters and with four
point suspension hangers on centrifugal
fan unit heaters and duct furnaces. All
units are available for operation on either
natural or LP (propane) gas.
Draft Diverter
Standard draft diverter construction is
corrosion resistant aluminized steel.
Casing
Burners
Casings are die-formed, 20-gauge
galvanized steel and finished in baked
enamel.The bottom panel is easily
removed to provide service access to the
burners, pilot and orifices.The pilot is
also accessible through a side panel
access plate.
Burners are die-formed, corrosion
resistant aluminized steel, with stainless
steel port protectors. Port protectors
prevent scale or foreign matter from
obstructing the burner ports. Burners are
individually removable for ease of
inspection and servicing. Each burner is
provided with an individually adjustable,
manually rotated air shutter adjustment.
Air shutter adjustment is fixed on duct
furnaces when the side access burner
drawer is supplied.
On duct furnaces the high limit switch is
accessible through a side panel access.
Duct discharge flanges for simple
ductwork connection are provided.
All unit heaters are provided with
independently adjustable horizontal
louvers with stops to prevent total
closure.
Controls
A factory installed junction box is
provided for all power connections.
Standard units are provided with a
24-volt combination single-stage
automatic gas valve, including main
operating valve and pilot safety shutoff,
pressure regulator, manual main and
pilot shutoff valve, and adjustable pilot
valve. Gas valve is suitable to a
maximum inlet pressure of 0.5 psi (14inch W.C.) on natural gas. A 24V control
transformer, a spill (blocked vent) switch,
high limit and fan time delay relay
(optional on duct furnaces) are provided.
The fan time delay relay delays the fan
start until the heat exchanger reaches a
predetermined temperature. It also
allows the fan to operate after burner
shutdown, removing residual heat from
the heat exchanger.
Fans
Propeller fan blades are constructed of
aluminum with an aerodynamic contour.
All fans are dynamically balanced for
quiet, efficient operation and supplied
with a protective type fan guard. Rubberin-shear isolators provide isolation
between the fan/motor combination and
the unit heater casing.
Centrifugal fan is belt driven with
adjustable pitch motor sheave. Fan is
dynamically balanced for quiet
operation.
62
UH-PRC002-EN
Mechanical
Specifications
Factory Installed Options
Control Options
Hydraulic Modulating Gas Valve
Provides modulated heat output. Ignition
is at low fire (50 percent input) and
discharge temperature sensing bulb
located in the air stream modulates the
gas input from 50 percent to 100 percent
rated input. Provided with an automatic
electric valve in series which cycles the
unit in response to a low voltage singlestage thermostat (thermostat not
included). (Not available on 30-75 MBh
units.)
Intermittent Pilot Ignition
Solid state ignition control system ignites
the pilot by spark during each cycle of
operation. When pilot flame is proven,
main burner valve opens to allow gas
flow to burners. Pilot and burners are
extinguished during off cycle. Required
on California units.
Electronic Modulating
4-20 mA/0-10VDC Input
Provides modulated heat output. Ignition
is at full fire (100 percent input), and
modulates the gas input from 100
percent to 40 percent rated input.
Field Installed Accessories
The modulating gas valve shall operate
in response to a 4-20 mA or a 0-10 VDC
input from an external DDC control.
Flue Vent Fan
Flue vent fan provides power venting.
Provided with all fixtures for field
mounting and wiring, the flue vent fan is
activated in response to a single stage
thermostat. A centrifugal switch in the
flue vent in turn activates the automatic
electric gas valve.
Heat Exchanger Options
Type 409 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 409
stainless steel.
Type 321 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 321
stainless steel (100-400 MBh only).
Additional Options
Type 409 Stainless Steel Burners
(Not available on 30-75 MBh units.)
Two-Stage Gas Valve
(Not available on 30-75 MBh units.)
Provides two stages of heat. Ignition is at
low fire (50 percent of the furnace’s rated
input). Requires the use of a
two-stage thermostat.
Orifices for Elevations Over 2000 Feet
Type 409 Stainless Steel Draft Diverter
(Not available on 30-75 MBh units.)
Hydraulic Modulating Gas Valve with
Bypass (N/A on 30-75 MBh units)
An additional electric valve in parallel
bypasses the hydraulic modulating valve,
overriding the discharge temperature
sensing bulb, allowing full fire. Requires
the use of a separate thermostat to
control the electric valve.
Horizontal Louvers (Duct furnace only)
Electronic Modulating Gas Valve (Natural
Gas Units Only) (N/A on 30-75 MBh
units)
Provides modulated heat output. Ignition
is at full fire (100 percent input), and
modulates the gas input from 100 to 50
percent rated input. Available for use
with room thermostat or duct thermostat
with remote setpoint adjustment. Duct
thermostat available with optional
override room thermostat which causes
the unit to go to full fire when the room
temperature falls below the override
room thermostat.
Summer/Winter Switch
Vertical Louvers
Duct Discharge Flange
Provided in lieu of louvers on units for
use with field ductwork (Centrifugal units
only)
Totally Enclosed Motor
Side Access Burner Drawer (Duct
Furnace Only)
Allows entire burner drawer to slide out
from the side of the unit for service or
inspection.
LP (Propane) to Natural Gas Conversion
Package
High Gas Line Pressure Regulator
Reduces main gas line pressure to a
minimum of seven-inches W.C. Pressure
at the jobsite must be specified.The
regulator is selected to accommodate
that specific pressure. (Natural gas units
only.)
Discharge Nozzles
“Y” Splitter (100-400 MBh only)
30° Downward (100-400 MBh only)
60° Downward (100-400 MBh only)
90° Downward (100-400 MBh only)
Drain Pan (Duct Furnace Only)
Recommended for use with installations
on the downstream side of a cooling
coil.
Thermostats
Low voltage room thermostat singlestage.
Low voltage room thermostat, singlestage with summer/winter switch.
Low voltage room thermostat,
two-stage.
Universal tamperproof guard for all
room thermostats.
Fan Time Delay Relay —(Duct Furnace
Only)
The fan time delay relay delays the fan
start until the heat exchanger reaches a
predetermined temperature. It also
allows the fan to operate after burner
shutdown, removing the residual heat
from the heat exchanger
(Recommended on applications that
require intermittent fan.)
Low voltage duct thermostat, singlestage.
One-inch throwaway filters (Centrifugal
with enclosure only)
Override room thermostat, for use with
duct thermostat and electronic
modulating control.
One-inch permanent filters (Centrifugal
with enclosure only)
UH-PRC002-EN
Natural to LP (Propane) Gas Conversion
Package (Standing Pilot Only)
Low voltage duct thermostat,
two-stage.
Room thermostat, electronic modulating
control.
Duct thermostat, electronic modulating
control.
63
Mechanical
Specifications
Separated Combustion Duct
Furnaces
General
Units are completely factory assembled,
piped, wired, and test fired. All units are
AGA Certified, 80 percent efficient and
conform with the latest ANSI Standards
for safe and efficient performance. Units
are provided with two-point suspension
hangers on propeller fan unit heaters
and with four-point suspension hangers
on centrifugal fan unit heaters. Units are
available for operation on either natural
or LP (propane) gas. Standard terms and
conditions apply.
Casing
Casings are die-formed, 20-gauge
galvanized steel and finished in baked
enamel.The bottom panel is easily
removed to provide service access to the
burners, pilot and orifice. All units
provided with independently adjustable
horizontal louvers with stops to prevent
total closure.
Heat Exchanger
Standard heat exchanger construction
consists of seam welded 20-gauge
aluminized steel tubes and 18-gauge
aluminized steel headers.
Burners
Burners are die-formed, corrosion
resistant aluminized steel, with stainless
steel port protectors. Port protectors
prevent scale or foreign matter from
obstructing the burner ports. Burners
individually removable for ease of
inspection and servicing. Each burner is
provided with an individually adjustable,
manually rotated air shutter adjustment.
Controls
A factory installed junction box is
provided for all power connections.
Standard units are provided with a 24V
combination single-stage redundant gas
valve, consisting of a combination pilot
solenoid valve, automatic electric gas
valve, pilot filter, pressure regulator, pilot
adjustment and manual shutoff. A flue
vent fan relay and combustion air
proving switch is also provided as
standard. Standard equipment includes
spark-ignited intermittent pilot system
with electronic flame supervision. A 24V
64
control transformer, high limit and fan
time delay relay are provided.The fan
time delay relay delays the fan start until
the heat exchanger reaches a
predetermined temperature. It also
allows the fan to operate after burner
shutdown, removing residual heat from
the heat exchanger.
Duct Discharge Flange
(Centrifugal fan units only) Provided in
lieu of louvers on units for use with field
ductwork.
Electronic Modulating
4-20 mA/0-10VDC Input
Provides modulated heat output. Ignition
is at full fire (100 percent input), and
modulates the gas input from 100
percent to 40 percent rated input.
High Gas Line Pressure Regulator
(Natural gas units only) Reduces main
gas line pressure to a minimum of
seven-inches W.C. Pressure at the jobsite
must be specified.The regulator is
selected to accommodate that specific
pressure.
The modulating gas valve shall operate
in response to a 4-20 mA or a 0-10 VDC
input from an external DDC control.
Flue Vent Fan
Flue vent fan provides power venting.
Provided factory assembled to a sealed
flue collection chamber.The flue vent fan
is activated in response to a low voltage
(24V) single-stage thermostat (NOTE:The
thermostat is not included with the gas
control option). A combustion air
pressure switch is provided as standard
to verify proper powered vent flow prior
to allowing the gas valve to operate.
Field Installed Accessories
LP (Propane) to Natural Gas Conversion
Package
Thermostats
Low voltage room thermostat, singlestage.
Low voltage room thermostat, singlestage with summer/winter switch.
Low voltage duct thermostat, singlestage.
Low voltage room thermostat, twostage.
Low voltage duct thermostat, two-stage.
Universal tamperproof guard for all
room thermostats.
Factory Installed Options
Discharge Nozzles
Two-Stage Gas Valve
Provides two stages of heat. Ignition is at
low fire (50 percent of the furnace’s rated
input). Requires the use of a two-stage
thermostat.
Y Splitter
Heat Exchanger Options
Concentric Vent Terminals
Type 409 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 409
stainless steel.
Vertical Concentric Vent Kit
Kit includes 5” cap with special attached
non-recirculation disc, special 8” cap
with 5” hole and concentric vent box.
Type 321 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 321
stainless steel.
Horizontal Concentric Vent Kit
Kit includes 5” cap with special attached
non-recirculation disc, inlet air screen
and concentric vent box.
30° Downward
60° Downward
90° Downward
Additional Options
Type 409 Stainless Steel Burners
Type 409 Stainless Steel Draft Diverter
Totally Enclosed Motor (Centrifugal fan
units only)
Orifices for elevations over 2000 feet
Summer/Winter Switch
Vertical Louvers
UH-PRC002-EN
Mechanical
Specifications
Units are completely factory assembled,
piped, wired, and test fired. All units are
AGA Certified and conform with the
latest ANSI Standards for safe and
efficient performance. Units are provided
with four point suspension hangers, and
are available for operation on either
natural or LP (propane) gas.
24-volt combination single-stage
redundant gas valve, consisting of a
combination pilot solenoid valve,
automatic electric gas valve, pilot filter,
pressure regulator, pilot adjustment and
manual shutoff. A flue vent fan relay and
combustion air proving switch is also
provided as standard. Standard
equipment includes spark-ignited
intermittent pilot system with electronic
flame supervision. A 24V control
transformer and a high limit are
provided.
Electronic Modulating Gas Valve (Natural
Gas Units Only)
Provides modulated heat output. Ignition
is at full fire (100 percent input), and
modulates the gas input from
100 to 50 percent rated input. Available
for use with room thermostat or duct
thermostat with remote setpoint
adjustment. Duct thermostat available
with optional override room thermostat
which causes the unit to go to full fire
when the room temperature falls below
the override room thermostat.
Casing
Flue Vent Fan
Casings are die-formed, 20-gauge
galvanized steel and finished in baked
enamel.The bottom panel is easily
removed to provide access to the
burners, pilot and orifices.The pilot is
also accessible through a side panel
access plate.The high limit switch is
accessible through a side panel access.
Duct discharge flanges for simple
ductwork connection are provided.
Flue vent fan is factory assembled to a
sealed flue collection chamber and
provides power venting.The flue vent
fan is activated in response to a low
voltage (24V) single-stage thermostat. A
combustion air pressure switch is
provided as standard to verify proper
powered vent flow prior to allowing the
gas valve to operate.
Electronic Modulating
4-20 mA/0-10VDC Input
Provides modulated heat output. Ignition
is at full fire (100 percent input), and
modulates the gas input from 100
percent to 40 percent rated input.
High Efficiency Indoor Gas
Duct Furnaces
General
Heat Exchanger
Standard heat exchanger construction
consists of seam welded 20-gauge
aluminized steel tubes and 18-gauge
aluminized steel headers.
Burners
Burners are die-formed, corrosion
resistant aluminized steel, with stainless
steel port protectors. Port protectors
prevent foreign matter from obstructing
the burner ports. Burners individually
removable for ease of inspection and
servicing. Each burner is provided with
an individually adjustable, manually
rotated air shutter adjustment. Air shutter
adjustment is fixed when side access
burner drawer is supplied.
Controls
A factory installed junction box is
provided for all power connections.
Standards units are provided with a
UH-PRC002-EN
Control Options
Two-Stage Gas Valve
Provides two stages of heat. Ignition is at
low fire (50 percent of the furnace’s rated
input). Requires the use of a two-stage
thermostat. (Thermostat not included.)
Hydraulic Modulating Gas Valve
Provides modulated heat output. Ignition
is at low fire (50 percent input) and
discharge temperature sensing bulb
located in the airstream modulates the
gas input from
100 percent to 50 percent rated input.
Provided with an automatic electric valve
in series which cycles the unit in
response to a low voltage single-stage
thermostat. (Thermostat not included.)
Hydraulic Modulating Gas Valve with
Bypass
An additional electric valve in parallel
bypasses the hydraulic modulating
valve, overriding the discharge
temperature sensing bulb, allowing full
fire. Requires the use of a separate
thermostat to control the electric valve.
The modulating gas valve shall operate
in response to a 4-20 mA or a 0-10 VDC
input from an external DDC control.
Heat Exchanger Options
Type 409 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 409
stainless steel
Type 321 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gaugeType 321
stainless steel
Additional Options
Type 409 Stainless Steel Burners
Orifices for Elevations over 2000 feet
Type 409 Stainless Steel Draft Diverter
Summer/Winter Switch
Horizontal Louvers
Horizontal and Vertical Louvers
Side Access Burner Drawer
Allows entire burner drawer to slide out
from the side of the unit for service or
inspection.
FanTime Delay Relay
The fan time delay relay delays the fan
start until the heat exchanger reaches a
predetermined temperature. It also
allows the fan to operate after burner
shutdown, removing the residual heat
from the heat exchanger.
(Recommended on applications that
require intermittent fan)
65
Mechanical
Specifications
Field Installed Accessories
Horizontal Blower Assembly
Factory Installed Options
Natural to LP (Propane) Gas Conversion
Package (Standing Pilot Only)
General
Insulation
Units are completely factory assembled,
and have four-point suspension hangers
and filter racks as standard.
Blower assembly and transition are
insulated with fire-resistant, odorless,
mat-faced one-inch glass fiber material.
Casing
Floor Mounting Legs
Casings are 18-gauge galvanized steel
with baked enamel finish. Side panels
are removable for easy servicing and
motor maintenance. Duct flanges are
provided for simple ductwork
connection. Standard filters are one-inch
permanent washable type.
Legs allow floor mounting of the blower
assembly.
Motors
One-inch throwaway
Factory mounted motors are open dripproof, 115, 230/60/1 or 208, 230, 460/60/3
with built-in thermal overload protection.
One-inch permanent
LP (Propane) to Natural Gas Conversion
Package
High Gas Line Pressure Regulator
Reduces main gas line pressure to a
minimum of seven-inches W.C. Pressure
at the jobsite must be specified.The
regulator is selected to accommodate
that specific pressure.
Discharge Nozzles
“Y” Splitter
30° Downward
60° Downward
90° Downward
Drain Pan
Recommended for use with installations
on the downstream side of a cooling
coil.
Thermostats
Low voltage room thermostat, singlestage
Fans
Centrifugal fan is belt driven with
adjustable pitch motor sheave. Fan is
dynamically balanced for quiet
operation.
Totally Enclosed Motor
Field Installed Accessories
Optional Filters
(One-Inch Permanent Standard)
Transition
When used with a duct furnace, a sheet
metal transition is supplied to connect
the blower assembly to the duct furnace.
Low voltage room thermostat, two-stage
Low voltage duct thermostat, singlestage
Low voltage duct thermostat, two-stage
Universal tamperproof guard for all
room thermostats
Low voltage room thermostat, singlestage with summer/winter switch
Room thermostat, electronic modulating
control
Duct thermostat, electronic modulating
control
Override room thermostat, for use with
duct thermostat and electronic
modulating control.
66
UH-PRC002-EN
UH-PRC002-EN
67
The Trane Company
An American Standard Company
www.trane.com
Literature Order Number
UH-PRC002-EN
File Number
PL-UN-UH-000-PRC002-2-01
Supersedes
UH-PRC002-EN 6/00
Stocking Location
Inland - LaCrosse
For more information contact your local
distributor (dealer), local district office, or Since The Trane Company has a policy of continuous product and product data improvement, it reserves the
e-mail us at comfort@trane.com
right to change design and specifications without notice.
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