Trane Indirect Fired Make Up Air Catalogue MUA DS 5 01/01/1998 Outdoor Gas Heating Units And Duct Furnaces Packaged Rooftop Unit For Heating, Cooling, Ventilating, M

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MUA-DS-5
January 1998

MUA-DS-5

Second Printing

Outdoor Gas
Heating Units and
Duct Furnaces
Packaged Rooftop Unit for
Heating, Cooling, Ventilating
and Make-Up Air Applications

Features
and
Benefits
The Trane rooftop line is a packaged air
heating and cooling system, suitable
for heating, cooling, ventilating
and make- up air applications. Unit
sizes range from 800 to 14,000 cfm
(0.4-6.6 cu. m/s) with 1/2-15 hp motor
capabilities. These rooftops are
available with inputs from 100,000 Btu/h
to 1,200,000 Btu/h (29.3 to 351.4 kW).
Duct furnaces are AGA and CGA
certified for safety and performance
with a range of 100,000 Btu/h input to
400,000 Btu/h (29.3 to 117.1 kW) input
per duct furnace. Packaged units are
also ETL and CSA certified for electrical
safety in compliance with UL-1995
Standard for HVAC equipment. The
rooftop units can be ordered as
individual duct furnaces only, heating
with evaporative cooling or packaged
heating and cooling systems.
The mechanical configuration is
determined by selecting one of the nine
standard arrangements. Rooftop
arrangements are divided into two
classifications — standard and high cfm
blower types.
The standard blower unit consists of a
blower cabinet that houses the
dampers, filters and blower in one
cabinet. An optional evaporative
cooling unit is available on units up to
800 MBh (234.3 kW). Trane
recommends the use of 409 stainless
steel whenever an evaporative cooling
unit is installed upstream of a duct
furnace section(s).

Furnace types are divided into two
classifications — standard temperature
rise and high temperature rise with
natural and power vented models. All
furnaces have optional left or right
hand access. Standard temperature
rise units have a lower pressure drop
across the heat exchanger allowing
higher airflow capabilities and an 80
percent efficiency rating with a
temperature rise of 20 to 60 F (11 to
33 C). High temperature rise units are
configured for higher temperature rise,
and have a higher pressure drop
across the furnace section of the unit
and a 79 percent efficiency rating with
a temperature rise of 60 to 90 F (33 to
50 C). The high temperature rise type
furnace is not available in California
and only available in a single furnace
package. The maximum discharge air
temperature for all duct furnaces is
150 F (66 C).
In addition to a versatile offering of
mechanical features, this new rooftop
unit also offers a wide variety of factory
installed control options. Control
components are located in the main
electrical cabinet. The main electrical
cabinet is located out of the air stream
as part of the blower transition,
between the blower cabinet and the
first furnace for both standard and high
cfm units. The standard electrical
control scheme consists of a solid-state
fan time delay, two pre-wired relay
sockets which are mounted on the

The high cfm blower unit utilizes a
separate damper/filter cabinet with a
“V” bank filter arrangement, a blower
cabinet and up to three duct furnaces
(1200 MBh) (351.4 kW). An optional
cooling coil cabinet is offered on units
up to 800 MBh. Trane recommends the
use of 409 stainless steel whenever a
cooling coil is used upstream of a
furnace section(s). Both standard and
high cfm blower arrangements may
also include a downturn supply air
plenum, outside air and/or return air,
intake hood and a roof curb.

unit’s main connection board, a solidstate gas ignition system and room or
duct thermostats. The units are also
equipped with a blower door safety
interlock, a 24 VAC circuit breaker, a
high temperature limit switch in each
furnace section and a reverse airflow
switch located in the blower cabinet as
standard equipment.
Gas control options range from single
stage to six stages of fire, mechanical
or electronic modulation and direct
digital control (DDC) interface. Air
control options offer a similar range of
control features from manual dampers
to modulating dampers that may
include mixed air, dry bulb, pressure
sensing, enthalpy control, DDC
interface or ASHRAE cycle control
arrangements.
The venting is an integral part of the
furnace and must not be altered in the
field. The rooftop furnaces are
equipped with a vent cap which is
designed for gravity venting. Air for
combustion enters at the base of the
vent through a protective grill, and the
design of the vent cap is such that the
products of combustion are discharged
at the upper section of the cap. This cap
is shipped in a separate carton. It
should be fastened in position and not
be altered in any way.

Gravity Venting

All units are completely packaged, railmounted, wired, piped, waterproofed
and test fired to assure a smooth
installation and easy start-up.

Power Venting
©American Standard Inc. 1998

2

Contents

The proximity of the combustion air
inlet to products of combustion
discharge is designed to provide
trouble-free operation under all types of
wind conditions.
The power vented unit has a system
with the inlet and discharge grill located
in the upper section of a split-side
panel. This balanced flue design also
performs well under virtually all wind
conditions.
Features and Benefits

• AGA and CGA Certified Duct Furnaces
• ETL and CSA UL-1995 Certified
Packaged Units
• FM (Factory Mutual) Compliant
• Heating Capacities from 100 MBh to
1200 MBh (29.3 kW to 351.4 kW)
• Gravity and Power Vented Furnaces
• 80% Efficient Standard Temperature

• Standard high temperature limit (each
furnace)
• Standard blower door safety interlock
switch
• Standard reverse airflow safety switch
• Standard 24-volt circuit breaker
• Standard printed circuit main
connection board
• Wiring harnesses with stamped wire
numbers
• Solid-state automatic pilot ignition
control
• Solid-state fan time delay
• Over 40 standard gas and air control
packages

Rise Furnace - 20 to 60 F (11 to 33 C) per
Furnace
• 79% Efficient High Temperature Rise
Furnace - 60 to 90 F (33 to 50 C) - single
furnace only
• CFM ranges from 800 to 14,000 CFM
(0.4 to 6.6 Cu.m/s)
• Motor sizes up to 15 horsepower
• ODP motors with high efficiency, totally
enclosed and two-speed options
• Left hand or right hand service access
• Draw-thru coil cabinet with stainless
steel drain pan
• Evaporative cooling with standard 8 or
optional 12” media (203 or 305 mm)
• Uninsulated or insulated roof curb
• Standard 18-gauge cabinets
• Standard 20-gauge aluminized steel
heat exchanger. Optional stainless
steel.
• Standard one-inch washable filters
• Standard single stage combination gas
valve

Features and Benefits

2

Unit Configurations

4

Model Number Description

7

General Data

9

Application Considerations

11

Selection Procedure

20

Performance Adjustment Factors 26

3

Performance Data

26

Electrical Data

42

Controls

43

Dimensional Data

46

Weights

100

Options

102

Features Summary

105

Mechanical Specifications

106

Unit
Configurations
 
Unit Type
Arrangement A
Rooftop Duct Furnace

Standard Features
- Natural or LP (Propane Gas)
- Single Stage 24-Volt Gas Valve
- Intermittent Pilot Ignition
- Orificed for Operation Up To 2000' Above Sea Level
- Aluminized Steel Heat Exchanger
- Flue Vent Cap (Gravity Vent Only)
- 24-Volt High Temperature Safety Circuit
- Terminal Block Wiring, Single Point Connection
- Quick Opening Access Doors

Arrangement B
Rooftop Heating Unit With Standard Blower

Same as Arrangement A with:
- Insulated Blower/Filter/Damper Cabinet
- 1” Permanent Filters
- Fan Time Delay Relay
- Electrical Cabinet Isolated from the Air Stream
- 24-Volt Control Circuitry
- Low Voltage Circuit Breaker
- Blower Door Interlock Switch with Service Override

Arrangement C
Rooftop Heating Unit with Standard Blower
and Downflow Supply Plenum

Same as Arrangement B with:
- Insulated Supply Plenum

See page 6 for Legend.

4

Unit
Configurations
 
Unit Type
Arrangement D
Rooftop Heating Unit with Standard Blower
and Evaporative Cooler

Standard Features
Same as Arrangement B with:
- Evaporative Cooler
- High Efficiency 8“ Media
- Self-Cleaning Design
- Sealed Pump Motor with Float Valve
- 24-Volt Control Circuitry
- Heavy-Duty Stainless Steel Water Tank
- Easy Access Intake Filter and PVC Distribution Tubes

Arrangement E
Rooftop Heating Unit with Standard Blower,
Evaporative Cooler and Downflow Supply Plenum

Same as Arrangement D with:
- Downflow Supply Plenum

Arrangement G
Rooftop Heating Unit with High Cfm Blower

- Natural or LP (Propane Gas)
- Single-Stage 24 Volt Gas Valve
- Intermittent Pilot Ignition
- Orificed for Operation up to 2000' above Sea Level
- Aluminized Steel Heat Exchanger
- Flue Vent Cap (Gravity Vent Only)
- 24-Volt High Temperature Safety Circuit
- Terminal Block Wiring, Single Point Connection
- Quick Opening Access Doors
- Permanent Filter
- Fan Time Delay Relay
- Standard V-bank Filter and Damper Cabinet
- Insulated Filter/Damper and Blower Cabinet

Arrangement J
Rooftop Heating Unit with High Cfm Blower
and Downflow Supply Plenum

Same as Arrangement G with:
- Insulated Supply Plenum

See page 6 for Legend.
5

Unit
Configurations
Unit Type
Arrangement K
Rooftop Heating Unit with High Cfm Blower
and Coil Cabinet

Standard Features
Same as Arrangement G with:
- Coil Section
- Mounting for 4 to 6 Row Coils
- Stainless Steel Drain Pan with 3/4” Tapped Outlets

Arrangement L
Rooftop Heating Unit with High Cfm Blower,
Coil Cabinet and Downflow Supply Plenum

Same as Arrangement K with:
- Insulated Supply Plenum

Motors, Air Inlet Configuration/Air Control and Damper Arrangement Must Be Selected for Each Unit
Notes:
1. Gravity vent or power vent models available on all unit sizes.
2. Optional air inlet hood shown in dotted lines.
3. Legend is as follows:
B/F/D - Standard Blower/Filter/Damper
SP - Supply Plenum
EV - Evaporative Cooler
F/D - Filter/Damper
B - High cfm Blower
CC - Coil Cabinet
4. Horizontal outside air over return air. Specify air inlet configuration 4 or 5 and then select miscellaneous option “D” for
horizontal return.
Air Inlet Configurations (Digit 18 of the Model Number)

1

2

3

4

5

6

See Note 4 Above

Model
Number
Description
G R A A 40 G D C C 0 N 2 B Q 1 0 2 A 0 +
1 2 3 4 5,6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Digit 1 — Gas Heating Equipment
G = Gas
Digit 2 — Unit Type
F = Rooftop Duct Furnace
R = Rooftop Heating Unit
S = Special Unit Type
Digit 3 — Furnace Type
A = Standard Temp Rise (20-60 F) LH
B = Standard Temp Rise (20-60 F) RH
C = High Temp Rise (60-90 F) LH
D = High Temp Rise (60-90 F) RH
S = Special Furnace Type
Note: LH = Left Hand
RH = Right Hand
Digit 4 — Development Sequence
A = First Generation
Digit 5,6 — Input Capacity
Single Furnace
10 = 100 MBh Input
15 = 150 MBh Input
20 = 200 MBh Input
25 = 250 MBh Input
30 = 300 MBh Input
35 = 350 MBh Input
40 = 400 MBh Input
Double Furnace
50 = 500 MBh Input
60 = 600 MBh Input
70 = 700 MBh Input
80 = 800 MBh Input
Triple Furnace
12 = 1200 MBh Input
SS = Special unit
Digit 7 — Venting Type
G = Gravity Venting
P = Power Venting
S = Special Venting
Digit 8 — Main Power Supply
A = 115/60/1
B = 208/60/1
C = 230/60/1
D = 208/60/3
E = 230/60/3
F = 460/60/3
G = 575/60/3
S = Special Main Power Supply

Digit 9 — Gas Control Option (Intermittent
Pilot Ignition)
A = Single-Stage
B = Two-Stage
C = Hydraulic Modulating (60-100)
D = Hydraulic Modulating (75-200)
E = Hydraulic Modulating With Bypass and
limit (60-100)
F = Hydraulic Modulating With Bypass
(75-200)
G = Electronic Modulating With Room
T-Stat
H = Electronic Modulating With Duct T-Stat
J = Electronic Modulating With Duct T-Stat
and Override Room Thermostat
K = Electronic Modulating W/External
4-20 mA Input (Furnace 1)
L = Electronic Modulating W/External
4-20 mA Input (All furnaces)
M = Electronic Modulating W/External
0-10 VDC Input (Furnace 1)
N = Electronic Modulating W/External
0-10 VDC Input (All furnaces)
P = Two-Stage Discharge Air Control w/OA
Reset.
R = Three-Stage Discharge Air Control
w/OA Reset.
T = Four-Stage Discharge Air Control w/OA
reset.
U = S-350 2 Stage Modular Electronic
Control System
W= S-350 3 Stage Modular Electronic
Control System
X = S-350 4 Stage Modular Electronic
Control System
Y = S-350 6 Stage Modular Electronic
Control System
S = Special Gas Control
Digit 10, 11 — Design Sequence
DO = Design Sequence
Digit 12 — Fuel Type
N = Natural Gas
P = LP (Propane) Gas
L = Natural Gas with 100% Lockout
S = Special Fuel type
Digit 13 — Heat Exchanger Material
1 = Aluminized Steel
2 = #409 Stainless Steel (First Furnace Only)
3 = #409 Stainless Steel (All Furnace
Sections)
4 = #321 Stainless Steel (First Furnace Only)
5 = #321 Stainless Steel (All Furnace
Sections)
6 = #409 Stainless Steel Package
(First Furnace Only)
7 = #409 Stainless Steel Package
(All Furnace Sections)
8 = #321 Stainless Steel Package
(First Furnace Only)
9 = #321 Stainless Steel Package
(All Furnace Sections)
S= Special Heat Exchanger Package

7

Digit 14 — Rooftop Arrangements
A = Duct Furnace
B = Blower (Standard)
C = Blower (Standard) Plenum
D = Blower (Standard) Evaporative Cooler
E = Blower (Standard) Evaporative Cooler/
Plenum
G = Blower (High CFM) /Plenum
J = Blower (High CFM) /Plenum
K = Blower (High CFM) /Coil Cabinet
L = Blower (High CFM) /Coil Cabinet/
Plenum
S = Special Rooftop Arrangement
Digit 15 — Rooftop Heating Unit Motor
Selection
0 = None (Rooftop duct furnace)
1
A = /2 HP w/contactor
B = 3/4 HP w/contactor
C = 1 HP w/contactor
D = 1 1/2 HP w/contactor
E = 2 HP w/contactor
F = 3 HP w/contactor
G = 5 HP w/contactor
H = 1/2 HP w/magnetic starter
J = 3/4 HP w/magnetic starter
K = 1 HP w/magnetic starter
L = 1 1/2 HP w/magnetic starter
N = 2 HP w/magnetic starter
P = 3 HP w/magnetic starter
Q = 5 HP w/magnetic starter
R = 7 1/2 HP w/magnetic starter
T = 10 HP w/magnetic starter
U = 15 HP w/magnetic starter
S = Special Motor
Digit 16 — Motor Speed
0 = No Selection
1 = Single Speed ODP 1800 RPM
2 = Single Speed TEFC 1800 RPM
3 = Single Speed High Efficiency ODP
1800 RPM
4 = Single Speed High Efficiency
TEFC 1800 RPM
5 = 2S1W ODP 1800/900 RPM
6 = 2S2W ODP 1800/1200 RPM
S = Special Motor Speed & Starter
Digit 17 — Coil Options
0 = No cooling coil selection
A = DX coil, 4 Row, Single Circuit
B = DX coil, 4 Row, Dual Circuit
C = DX coil, 6 Row, Single Circuit
D = DX coil, 6 Row, Dual Circuit
E = Chilled Water Coil, 4 Row,
G = Chilled Water Coil, 6 Row,
S = Special coil

Model
Number
Description
Digit 18 — Air Inlet Configuration
0 = None (Rooftop Duct Furnace)
1 = Outside Air (OA) (Horizontal Inlet)
2 = Outside Air W/Air Hood (Horizontal
Inlet
3 = Bottom Return Air (RA)
4 = Outside And Return Air (OA/RA)
5 = Outside and Return Air W/Air Hood
S= Special Air inlet configuration
Digit 19 — Air Control and Damper
Arrangement
0 = None (Rooftop Duct Furnace)
A = Outside Air 2 pos. Motor/SR
B = Return Air 2 pos. Motor/SR
C = OA/RA 2 pos SR
E = OA/RA Mod Mtr W/Mixed Air Control/
Min Pot/SR
H = OA/RA Mod Mtr W/Mixed Air Control/
SR
K = OA/RA Mod Mtr W/Min Pot/SR
M = OA/RA Mod Mtr W/Dry Bulb/Mixed Air
Control/Min Pot/SR
N = OA/RA Mod Mtr W/ Enthalpy
Controlled Economizer/SR
P = OA/RA Mod Mtr W/ Space Pressure
Controller
R = OA/RA Mod Mtr W/ S-350 P
Proportional Mixed Air Control/SR
U = OA/RA Mtr. W/External 0-10 VDC and
4-20 mA Analog Input/SR (External
Input)
W= ASHRAE Cycle I (OA/RA 2 pos. w/
warm-up stat/SR
X = ASHRAE Cycle II (OA/RA Mod
W/Warm-up Stat/Mixed Air/min pot/SR
Y = ASHRAE Cycle III (OA/RA Mod.
W/Warm-up Stat/Mixed Air/SR
Z = Manual Dampers
S = Special Air Control and Damper
Arrangement

8

Digit 20
0 = Non-California Shipment
1 = California Shipment
Digit 21 — Miscellaneous Options
A = Orifices For Elevation Above 2000 Feet
(Specify Elevation)
B = 12” Evaporative Media
C = Moisture Eliminators
D = Horizontal Return
E = Continuous Fan Relay
F = Freezestat
G = Fan Time Delay Control
(Duct Furnace Only)
H = Return Air Firestat
J = Supply Air Firestat
K = Manual Blower Switch
L = 409 Stainless Steel Furnace Drip Pan
N = Foil Face Insulation
P = Low Leak Dampers
Q = Clogged Filter Switch
R = High/Low Gas Pressure Limit Switches
T = Status Indicator Lamps (Elec Cabinet)
V = Manual Reset High LImit Switch
W= Interlock Relay —24/115V Coil
SPDT 10A
X = Interlock Relay —24/115-230V Coil
DPDT 10A
Y = Ambient Lockout

General
Data

*The maximum CFM for
Rooftop Arrangements
K and L is 6,300
(3.0 m3/S). A two-speed
motor may be utilized
for non-cooling airflow
up to 14,000 CFM
(6.6 m3/S).
Furnace Type A,B
∆T20 - 60F

Furnace Type C,D
∆T60 - 90F

Furnace Type A,B
∆T40 - 120F

Standard Blower
Rooftop Arrangements B,C

Standard Blower w/Evap.
Rooftop Arrangements D,E

High CFM Blower
Rooftop Arrangements G, J

High CFM Blower w/Cooling
Rooftop Arrangements K,L*†

Capacity 10-40
10 - 1,200-3,500 CFM, 1/2 - 5 HP
15 - 2,000-4,500 CFM, 1/2 - 5 HP
20 - 2,500-5,500 CFM, 1/2 - 5 HP
25 - 3,000-5,500 CFM, 3/4 - 5 HP
30 - 3,700-7,000 CFM, 3/4 - 5 HP
35 - 4,500-8,500 CFM, 3/4 - 5 HP
40 - 5,000-8,500 CFM, 1 - 5 HP

Capacity 10-40
10 -1,200-3,500 CFM, 1/2 - 5 HP
15 - 2,000-4,500 CFM, 1/2 - 5 HP
20 - 2,500-5,500 CFM, 1/2 - 5 HP
25 - 3,000-5,500 CFM, 3/4 - 5 HP
30 - 3,700-7,000 CFM, 3/4 - 5 HP
35 - 4,500-8,500 CFM, 3/4 - 5 HP
40 - 5,000-8,500 CFM, 1 - 5 HP

Capacity 20-40
20 -2,500-7,400 CFM, 3/4 - 10 HP
25 - 3,100-7,500 CFM, 3/4 - 10 HP
30 - 3,700-11,00 CFM, 1/2 - 15 HP
35 - 4,500-13,000 CFM, 3/4 - 15 HP
40 - 5,000-14,000 CFM, 1 - 15 HP

Capacity 10-40
10 -1,200-3,000 CFM, 1/2 - 5 HP
15 - 2,000-3,000 CFM, 1/2 - 5 HP
20 - 2,500-4,400 CFM, 3/4 - 10 HP
25 - 3,100-4,400 CFM, 3/4 - 10 HP
30 - 3,700-5,700 CFM, 1/2 - 15 HP
35 - 4,500-5,700 CFM, 3/4 - 15 HP
40 - 5,000-6,300 CFM, 1 - 15 HP

ESP .1 - 2 in. WC

ESP .1 - 2 in. WC

ESP .1 - 2 in. WC

ESP .1 - 2 in. WC

Capacity 10-40
10 - 800-1,200 CFM, 1/2 - 1 1/2 HP
15 - 12,000-1,800 CFM, 1/2 - 2 HP
20 - 1,600-2,400 CFM, 1/2 - 2 HP
25 - 2,000-3,000 CFM, 1/2 - 3 HP
30 - 2,400-3,600 CFM, 1/2 - 5 HP
35 - 2,800-4,200 CFM, 1/2 - 5 HP
40 - 3,200-4,800 CFM, 1/2 - 5 HP

Capacity 10-40
10 - 800-1,200 CFM, 1/2 - 1 1/2 HP
15 - 12,000-1,800 CFM, 1/2 - 2 HP
20 - 1,600-2,400 CFM, 1/2 - 2 HP
25 - 2,000-3,000 CFM, 1/2 - 3 HP
30 - 2,400-3,600 CFM, 1/2 - 5 HP
35 - 2,800-4,200 CFM, 1/2 - 5 HP
40 - 3,200-4,800 CFM, 1/2 - 5 HP

ESP .1 - 2 in. WC

ESP .1 - 2 in. WC

Capacity 50-80
50 - 3,000-3,500 CFM, 1 - 5 HP
60 - 3,700-6,500 CFM, 1 - 5 HP
70 - 4,500-8,000 CFM, 1 - 5 HP
80 - 5,000-8,000 CFM, 1 - 5 HP

Capacity 50-80
50 - 3,000-3,500 CFM, 1 - 5 HP
60 - 3,700-6,500 CFM, 1 - 5 HP
70 - 4,500-8,000 CFM, 1 - 5 HP
80 - 5,000-8,000 CFM, 1 - 5 HP

Capacity 50-80
50 - 3,100-7,500 CFM, 1 - 10 HP
60 - 3,700-11,000 CFM, 3/4 - 15 HP
70 - 4,500-13,000 CFM, 1 - 15 HP
80 - 5,000-13,500 CFM, 1 - 15 HP

Capacity 50-80
50 - 3,000-4,400 CFM, 1 - 10 HP
60 - 3,700-5,700 CFM, 3/4 - 15 HP
70 - 4,500-5,700 CFM, 1 - 15 HP
80 - 5,000-6,300 CFM, 1 - 15 HP

ESP .1 - 2 in. WC

ESP .1 - 2 in. WC

ESP .1 - 2 in. WC

ESP .1 - 2 in. WC

NA

NA

Furnace Type A,B
∆T60 - 180F

NA

Capacity 20-40
20 - 1,600-2,400 CFM, 1/2 - 2 HP
25 - 2,000-3,000 CFM, 1/2 - 2 HP
30 - 2,400-3,600 CFM, 1/2 - 5 HP
35 - 3,000-4,200 CFM, 1/2 - 5 HP
40 - 3,300-5,000 CFM, 1/2 - 5 HP

ESP .1 - 2 in. WC

Capacity 12
12 - 5,500-13,000 CFM, 1 1/2 - 15 HP

NA

ESP .1 - 2 in. WC
†These minimum and maximum CFM’s shown are for Arrangements K and L in the cooling mode. See Performance Data for heating mode specifications.

Damper/Filters
(High CFM)

Blower/Main Electrical
(High CFM) 0-15 HP

Coil Cabinet
(High CFM)

Intake Hood

Evaporative Cooler
(Standard)

Furnace One

Dampers/Filters/Blower/Main
Electrical
(Standard) 0-5 HP

9

Furnace Two

Furnace Three

Furnace Type A-B
Arrangement B-E
Arrangement G-L

Furnace Type A-B
Arrangement G-J Only

Supply Plenum

General
Data
 
Table G-1 — Filter Data
Rooftop
Arrangement
B-E

10,15
(4)16 x 20

20,25,50
(4)20 x 20

G-L

(8)16 x 20

(8)20 x 20

Table G-2 — Metric Conversion Table

Unit Size

30,35,60,70
(4)16 x 20
(2)20 x 20
(8)16 x 20
(4)20 x 20

40,80,12
(6)20 x 20
(12)20 x 20

Unless otherwise specified, the following conversions may be used for calculating SI unit measurements:
1 cubic foot= 0.028 m3
1 inch water column = 0.029 kPa
1 foot = 0.0305 m
1 gallon = 3.785 L
1 inch = 25.4 mm
1,000 Btu/Cu. Ft. = 37.5 MJ/m3
1 psig = 6.894 kPa
1 liter/second = CFM x 0.472
1 pound = 0.453 kg
1 meter/second = FPM ÷ 196.8
1,000 Btu per hour = 0.293 kW

10

Application
Considerations
General
Outdoor 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.
DUCT
FURN

Air
Handling
Unit

To Zone
No. 1

DUCT
FURN

To Zone
No. 2

DUCT
FURN

To Zone
No. 3

Note: When installing duct furnaces in
parallel or in series, minimum
clearance requirements must be
considered. This clearance is required
for serviceability. Duct furnaces are
approved for blow-thru applications
only. Right-hand burner drawers are
available for parallel applications.
Contact your local Trane representative
for more information.
When used in conjunction with filters,
cooling coils and an air handler, the
duct furnace can become part of a builtup heating and cooling system.

Filter

Fan
Supply

Duct
Furnace

Cooling
Coil

Outdoor heating units are designed for
make-up air or space heating
applications. These weatherproofed
units are intended for roof or slab
mounting, saving indoor space and
offering easy access for service and
maintenance. The units are typically
used in ducted applications.
Outdoor units cannot be mounted
indoors due to the flue configuration.

Gas Heating Value
The majority of gas heating units are
installed in applications where natural
gas is readily available. In areas where
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
Btuh per cubic foot; for propane it is
2,500 Btuh per cubic foot. Significant
variations from these standard values
should be taken into account in
equipment 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
Standard gross heat value (Btuh/cu ft)
Actual gross heat value (Btuh/cu ft)
Low Temperature Rise
Trane recommends against the set-up
of a unit which will result in a
temperature rise of less than 20 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 (610 m)
above sea level. Above 2,000 feet
(610 m), 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 make-up 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

11

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. An optional 409 or 321
stainless steel heat exchanger is
recommended whenever there is an
evaporative cooler or cooling coil
upstream of the furnace section(s).

Application
Considerations

Outdoor gas heating products are used
in either make-up air or space heating
applications (constant volume or
variable air volume). These two basic
applications are discussed in detail
below.
Make-Up Air Applications
Make-up air systems provide outside
air for ventilation requirements and
replace air removed by an exhaust air
system. Typical applications include
kitchens, restaurants, manufacturing
areas, sports centers, garages and
terminals.
Local codes and ordinances frequently
specify ventilation requirements for
public places and industrial
installations. Generally accepted
industry practices are given in the
ASHRAE Handbook of Fundamentals.
Published industrial ventilation codes
are usually based on summer
ventilation conditions of a work
environment and should be reviewed
for winter operation. Exhaust
requirements should also be examined
to establish the year-round make-up
air requirement within limitations of
codes and regulations. Whenever
fresh air will be used and is present at
temperatures below 40 F, 409 stainless
steel heat exchangers are
recommended.

18”
(457 mm)

AIR FLOW

18”
(457 mm)

Blower

Electrical Cabinet

Careful review of the job application
with respect to use, probable
contaminants within a conditioned
space and 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.

Duct Furnace

Duct Furnace
Supply Plenum

18”
(457 mm)

F*

*Refer to Outdoor Duct Furnace Manual for specific clearances.

Space Heating Applications —
Constant Volume
Make-up air units can be used to offset
a portion of the building heat losses in
addition to supplying make-up air. This
is accomplished by heating the makeup air beyond the required space
temperature. The additional heat
supplied above room temperature can
satisfy a portion of the space heating
requirement. The additional capacity
(Btuh) available for heating can be
calculated with the following equation:
Space Heating Capacity =
1.085 x SCFM Make-up Air x
(Max ∆T - (Troom - TO.A.))
Outdoor units using 100 percent return
air or a combination of return and
outside air are more efficient in
providing space heat than make-up air
units using 100 percent outside air at a
colder temperature.

Space Heating Applications —
Variable Air Volume
Dual duct VAV systems have one duct
to distribute cold air to those spaces
that need cooling and another to
distribute warm air to those spaces
that need heating. When separate fans
are used to handle the two duct
systems, the ductwork can be arranged
to allow simultaneous use of airside
economizers and plenum heat of
lights. The cooling unit uses return air
or cold outside air in order to save
compressor energy. The heating unit
uses only plenum heated return air.
This return air contains the rejected
heat from the lights in the building and
when recovered through the heating
unit, can lower gas heating costs.
In this mode, the dual duct VAV is not
unlike water source heat pumps or
three deck multizone air handlers, but
also has the added savings of variable
air volume.
Result — dual duct VAV is an efficient
system capable of using economizers
and heat recovery devices. Occupant
comfort is enhanced because heating
and cooling are always available to the
perimeter zones.

12

Application
Considerations
General System Types
Single-Zone Staged Systems

Supply Fan

Gas Fired Furnace

100%

50%

0%

Supply Air

Return Air
Stages of Fire
T = Thermostat F = Fan Switch

Single-zone staged systems can use
multistage thermostats or ductstats for
control of heating and cooling as well
as multi-stage electronic controls.
Systems need to be sized with respect

to the heated space. Typical staged
single-zone heating is achieved with a
two-stage thermostat, delivering 50
percent of the units rated input at low
fire and 100 percent at high fire. The
thermostat is set to the desired space

I = Ignition System

temperature with a differential setting
for high and low fire. A fan time delay
relay provides fan control with a post
warm-up delay period preventing
discomfort in the space.

Supply Fan Gas Fired Furnace

100%
85%
67%
50%
33%
17%
0%

T = Temperature Sensor
I = Ignition System

Electronic controls generally provide
more stages of control with a higher
degree of precision in temperature
sensing and actuation of stages. A six1000 Ohms

Supply Air

Return Air

Stages of Fire

stage system equipped with an
electronic control system can deliver
16 percent of a units input at stage 1
(low fire), 33 percent at stage 2,

500 Ohms 500 Ohms

F = Fan Switch
E = Electronic Control

50 percent at stage 3, 66 percent at
stage 4, 84 percent at stage 5 and
100 percent at stage 6 (high fire).

1000 Ohms 1000 Ohms

333.3 Ohms

1000 Ohms 1000 Ohms

333.3 Ohms

333.3 Ohms

333.3 Ohms
To
Controller

To
Controller

To
Controller

To
Controller

Direct

Series

Series/Parallel

Series/Parallel

Large areas may incur hot and cold
spots due to thermostat location, this
can be overcome with electronic
controls by incorporating within the

space a scheme of temperature
averaging, by locating a number of
series or series/paralleled temperature
sensors such as thermisters, rtds or

13

prtd type sensors, an average
temperature within the space can be
transmitted to the control system.

Application
Considerations
Multizone Staged Systems

Supply Fan

Multizone staged systems act on the
same basic principals as a single-zone
staged system where as each stage is
engaged with respect to demand. With
multizone systems a thermostat or
zone sensor is used for each zone. The
system must be sized to maintain
comfort levels for all zones. Zone
dampers are used for efficient
operation of multizone systems. Upon
a call for heat from either zone the
system will fire at low fire, upon a call
from both zones the system will go to
high fire. The zone dampers shall open
and close upon a call for heat from
their respective zone sensors. Typically
a discharge air thermostat or sensor is
used to maintain supply air
temperature in multizone systems.

Gas Fired Furnace

Return Air
Supply Air

Zone A

Zone B

Td = Discharge Air Temperature
Ta/b = Temperature Sensor Zone A/B
F = Fan Switch
I = Ignition System
D = Damper Actuator
Two Zone System

100%
Outside Air

Damper
Percent
Open
50%

Outside Air Damper
Return Air Damper
Return Air

0%
Interlocked Outside and Return Air Dampers

Supply Air

T = Temperature Sensor
D = Damper Actuator
Outside and Return Air Damper Arrangement

Outside and Return Air Damper
Control
Outside and return air damper control
may be included in a staged single or
multizone system. Interlocked outside
and return air dampers with
proportional actuator control, either
electronic or electromechanical can
maintain a minimum outside air setting
and a mixed air setting. Damper
control may also include enthalpy or
pressure control.

14

Application
Considerations
Make-Up Air Systems
Exhaust Fan

Supply Fan

Outside Air
Exhaust Air

Return Air

Supply Air

Inside Air

T = Temperature Sensor
D = Damper Actuator
P = Pressure Sensor

Rooftop Make-Up Air Unit with a
Rooftop Exhaust Unit
Outside air is introduced in order to
replace or make up for exhausted air
due to commercial or industrial
processes that require exhausted air
within a space. The make up air is
heated to a comfortable level relieving
any additional load on the space
heating system. Make-up air systems
may also be configured to supplement
space heating by increasing the
discharge air temperature beyond the
required temperature for the space.
This additional heat above space
temperature can offset a portion of the
buildings heat losses. The additional
heating capacity (Btuh) can be
calculated as:
Space Heating Capacity =
1.085 x SCFM Make-Up Air x
(Max ∆T - (TROOM - TO.A.)).

Typical applications for make up air
may include restaurants, kitchens,
public arenas, airport and bus
terminals, parking and maintenance
garages, manufacturing and process
areas. Make-up air and exhaust units
may be matched in size and electrically
interlocked with 100 percent outside air
introduced when the exhaust fan is
engaged. The make-up air system may
also incorporate outside and return air
and modulate the mixture based upon
building pressure typically maintaining
a slightly positive pressure within the
space in order to reduce infiltration.
The mixed air arrangement is
generally the more efficient method
due to the tempering of the outside air,
however some applications may
require 100 percent outside air due to
poor return air quality. The use of 409
or 321 stainless steel heat exchangers
is recommended whenever outside air
is used.
  

15

Application
Considerations
Direct Digital Control (DDC) Systems
Damper
Actuator

Cooling

Supply Fan

Heating
Discharge
Air Sensor

Outside Air
Sensor
Mixed Air
Sensor

Room Sensor

Communication
Via Modem

Digital Control Panel

Personal Computer
Basic DDC Control System with Heating/Cooling Rooftop Unit

The basic direct digital control (DDC)
system uses a microprocessor based
controller and software to perform
system and building control functions.
The controller receives input from
sensors mounted within the system.
Based upon input data, the controller
outputs a programmed response to the
system’s actuators (gas valves, fan
motors and damper motors). Inputs
may consist of temperature, pressure
or flow and can be analog or digital
signals. Output can also be analog or
digital; analog output signals are
generally 4-20 mA or 0-10 VDC and
digital outputs a relay actuation.

The control may be located in the unit
or in the building. A personal computer
(PC) and software may be provided for
remote communication. Temperature
setpoints, night setback, time limited
cycling, safety interlock input and
system override functions may be
setup at the controller or by PC
interface via modem or direct
connection. The controller may store in
memory a number of previous cycles
of operation with date, time, sensed
temperatures, rate of fire and durationof-cycle information available for down
loading to a PC for report generation
and printout. With digital control,
energy use can be easily optimized for
economical operation while
maintaining comfort levels with a
higher degree of accuracy.

16

Unit Placement
Refer to the applicable Trane
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.
Outdoor units are designed and
certified for outdoor use only. They
may be located on the roof or at any
convenient location outside the
building to be heated. When locating
units on the roof, make certain that it is
capable of carrying the additional load
of this equipment.
Units are mounted on skids and are
suitable for curb or slab mounting. It is
recommended that the unit’s skids be
mounted either on solid planking or
steel channels, but not on a soft tar roof
where the skids could sink and reduce
the clearance between the bottom of
the unit and the roof.

Application
Considerations
Venting
The venting is an integral part of the
furnace and must not be altered in the
field. The rooftop furnaces are
equipped with a vent cap which is
designed for gravity venting. Air for
combustion enters at the base of the
vent through a protective grill, and the
design of the vent cap is such that the
products of combustion are
discharged at the upper section of the
cap. This cap is shipped in a separate
carton. It should be fastened in
position and not be altered in any way.
The proximity of the combustion air
inlet to products of combustion
discharge is designed to provide
trouble-free operation under all types
of wind conditions.
The power vented unit has a system
with the inlet and discharge grill
located in the upper section of a splitside panel. This balanced flue design
also performs well under virtually all
wind conditions.

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 “lockout” 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 will need to
specify fuel type “L” Natural Gas with
100 percent lockout.
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 Btuh (43.9-117.1 kW) require
“mechanical exhaust” and a “safety
interlock.” For our units this means a
power vented unit.

17

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 gas train,” 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 Btuh (117.1
kW). This may be one of the reasons
why the majority of gas heating
equipment manufacturers (indirectfired) limit their largest individual
furnace to 400,000 Btuh (117.1 kW).
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 WC (3.5 kPa), a step
down pressure regulator must be field
installed ahead of the gas valve.
Minimum inlet pressure for natural gas
units is 6 1/2 inches W.C (1.6 kPa).
For LP (propane) gas, the minimum
inlet pressure is 11 1/2 inches WC
(2.9 kPa) and the maximum inlet
pressure is 14.0 inches WC (3.5 kPa).

Application
Considerations
High Pressure Regulators —
Natural Gas Only
The Trane gas heating products
contained in this catalog are designed
to operate at a pressure of 3.5-inch WC
(0.9 kPa) (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 WC (3.5 kPa) (1/2 psi) down to
3.5-inch WC (0.9 kPa) on the leaving
side of the valve. The valve typically
“drops” about 1 1/2-inch so the
minimum supply pressure is 5-inch
WC.
Whenever supply pressures exceed
14-inch WC (3.5 kPa), a high pressure
regulator should be selected. We
supply an Equimeter 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.

18

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 regulator’s range
as it pertains to inlet pressure and
MBh. NA 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 or
industrial supply house.

Selection
Procedure
Quick Sizer Chart 1
Furnace Type (A, B) Standard Temperature Rise
Rooftop Arrangement (B, C, D, E)

19

Selection
Procedure
Quick Sizer Chart 2
Furnace Type (C, D) High Temperature Rise
Rooftop Arrangement (B, C, D, E)

20

Selection
Procedure
Quick Sizer Chart 3
Furnace Type (A, B) Low Temperature Rise
Rooftop Arrangement (G, J, K, L)

21

Selection
Procedure
Quick Sizer Chart 4
Furnace Type (C, D) High Temperature Rise
Rooftop Arrangement (G, J, K, L)

22

Selection
Procedure
Step 1
To properly select a unit, two of the
three following items must be known:
temperature rise (TR) required, cubic
feet per minute of air delivery (cfm)
required and output (Btu/h out)
required. From any two of these items
the third item can be determined, as
well as the input (Btu/h In) required by
using the following:
TR = BTU/H Out ÷ (1.085 x CFM)
CFM = BTU/H ÷ (1.085 x TR)
BTU/H Out = (CFM x 1.085) x TR
BTU/H In = BTU/H Out ÷ Efficiency
.80 or .79
(The value 1.085 represents a constant.)
With any two of the three required
values, match these requirements to a
unit with the nearest input (Btu/h),
temperature rise (TR) and airflow (cfm)
capabilities keeping in mind that:
BTU/H Out = BTU/H In x Efficiency
Refer to the “Packaged Rooftop
Arrangement Reference,” page 9, to
match a capacity range (Btu/h), air
delivery (cfm) and temperature rise
(TR) with a rooftop arrangement.
The top portion of Quick Sizer Charts 1,
2, 3 and 4 allows the use of
temperature rise and cfm to determine
capacity, or temperature rise and
capacity to determine cfm, or capacity
and cfm to determine temperature rise.
Follow the top chart down to the
corresponding filter and cooling range
for the selection.
Step 2
Once capacity, temperature rise and
cfm have been determined, go to the
accessory pressure losses table for the
arrangement and calculate pressure
losses for unit accessories. Add the
losses for filters, plenums, dampers,
rainhood with screen or moisture
eliminators, evaporative cooler or
cooling coil and losses due to ductwork
to determine the total esp.
Step 3A — 2000 ft. Altitude and Below
Refer to the performance table for the
selection and determine rpm and bhp
for the total external static pressure
(esp). Go to the table row that most
closely matches unit capacity,
temperature rise and cfm, follow the
row out to the column that equals the
total esp for rpm and bhp values.

Figure SP-1 — Zone Chart

Step 3B — Above 2000 ft. Altitude
To correct for altitude, go to Table
PAF-1, Correction Factors for Altitude.
From this table, determine the
correction factor from temperature and
altitude for the system.
Correct the esp from ductwork to actual
esp for altitude, then add sp from
accessories as shown below. Refer to
the performance table for the selected
unit. Go to the row that most closely
matches unit capacity, temperature rise
and cfm, and follow the row out to the
column that equals the corrected actual
esp for rpm and bhp values. The bhp
value can now be corrected to actual
bhp for altitude as shown below.
Actual ESP = Duct ESP x Factor +
Access. SP
Actual BHP = Cat. BHP ÷ Factor
Corrected BTUH Input =
Catalog BTUH Input ÷ Factor
Corrected BTUH Output =
Corrected BTUH Input x Efficiency

23

Performance
Evaporative cooling is most commonly
used in areas where the relative
humidity is low and the dry bulb
temperatures are high. However,
cooling through evaporation can be
used in most areas.
Evaporative cooling is best utilized
whenever the wet bulb depression
(difference between dry and wet bulb
temperature) is a minimum of 15 F.
The efficiency of the evaporative cooler
is determined by a variety of factors:
geographical location, application, air
change requirements, sufficient water
supply, airflow and maintenance. In
most instances, efficiency is expected
to be between 77 percent and 88
percent. Heat gains in the distribution
system will affect the final output
temperature.
Note: For SI metric conversion, see
Table G-2 on page 10.

Selection
Procedure

Figure SP-2 — Psychrometrics Chart

Use the psychrometric chart (shown in
Figure SP-2) or actual humidity
temperature readings to estimate the
leaving dry bulb temperature at the
outlet of the evaporative cooler.
Example:
Entering Dry Bulb: 95 F
Entering Wet Bulb: 75 F
Wet Bulb Depression (95 F - 75 F)
  = 20 F
Effective Wet Bulb Depression
  (20 F x .85) = 17 F
Leaving Dry Bulb Temperature
  (95 F - 17 F) = 78 F
Leaving Wet Bulb = Entering Wet Bulb
  = 75 F

Selection Method
The easiest method for selecting an
evaporative cooler is to first determine
the required number of air changes per
minute.
1
Using Figure SP-1, choose the
geographical zone in which the unit is
to be installed.
2
Determine the internal load within the
structure:
Normal Load: structures with normal
people loads, and without high internal
heat gains.
High Load: Structures with high
equipment loads (i.e. factories,
laundromats, beauty salons, restaurant
kitchens, etc.), and structures with high
occupancy (night clubs, arenas, etc.).
3
Determine whether the structure has
normal or high heat gains.
Normal Gain: Structures that have
insulated roofs or are in shaded areas.
Structures that have two or more
stories or facing directions with no sun.
High Gain: Structures that have
uninsulated roofs, unshaded areas, or
rooms that are exposed to sun.
4
Using Table SP-1, determine the
required air changes per minute based
on zone selection and the type of heat
load.
5
Finally, determine the air quantity for
the space chosen, by calculating the
volume (L x W x H). Multiply this
volume by the air changes per minute.
Example:
Structure Dimensions:
  25 L x 24 W x 10 H = 6000 Ft3
Exterior Load Type: Normal
Interior Load Type: Normal
Location: Dallas, Texas — Zone 3
Air Changes Per Minute: 3/4
Evaporative Cooler Requirements:
  6000 Ft3 x 3/4 Air Change/Minute =
4500 CFM Required
See the evaporative cooler
performance chart for unit size that
would best apply.
Table SP-1 — Air Changes Per Minute
Type Heat Load
High Load/High Gain
High Load/Normal Gain
Normal Load/High Gain
Normal Load/Normal Gain

24

1
/4
1
/2
1
/2
1
/2
3

Zone
2
3
4
1 1 1/3
2
3
/4 1
1 1/3
3
/4 1
1 1/3
1
/2 3/4
1

Cooling Coils
Cooling coils are used in air handling
systems to cool and dehumidify an air
stream for comfort purposes. To reduce
the cooling load in buildings, most
applications recirculate a large
percentage of the air. Usually
recirculated air is 75 to 80 percent of
the airflow with the remainder being
outside fresh air. Some codes require
100 percent outside air, particularly for
hospitals and schools. Also many
engineers specify higher percentages
of outside air to meet the requirements
of ASHRAE Standard 62-1989
“Ventilation for Acceptable Indoor Air
Quality.”
1
In order to select the least expensive
coil to meet the specific performance
criteria, the following information is
required:
- Unit size
- Airflow in SCFM or ACFM and altitude
(see “Fan Selection at Altitude“)
- Entering air dry bulb and wet bulb
temperatures based on ratio of
outside to return air.
- Cooling load MBh (1000’s Btu/h) or
leaving air wet bulb.
2
For chilled water coils, the following
additional information is required.
- Fluid type: water, ethylene glycol,
propylene glycol and percent of
mixture.
- Entering fluid temperature — F
- Leaving fluid temperature — F or rate
of flow GPM.
Chilled water catalog tables are based
on:
45 F entering water temperature
Entering air temperature of 80 F DB/67
F WB. Data is certified in accordance
with ARI Standard 410. For other than
these conditions, please consult the
factory.

Selection
Procedure
3
For DX (refrigerant) coils the following
additional information is required:
- Refrigerant type
- Suction temperature — F
- Liquid temperature — F
- Type of circuiting desired
- Hot gas bypass required?
DX catalog tables are based on:
45 F suction temperature
Entering air temperature of 80 F DB/
67 F WB
R-22 refrigerant
100 F liquid temperature
Data is certified in accordance with
ARI Standard 410. For other than
these conditions, please consult the
factory.
4
When specifying a coil, one of the most
important pieces of information is the
airflow in SCFM. As stated in the “Fan
Selection at Altitude” section, SCFM
means Standard CFM or air at a
density of 0.075 lb./cu. ft. A fan must be
selected using ACFM or ACTUAL CFM.
A cooling coil or heating coil must be
selected using SCFM. Up to an altitude
of approximately 1,500 feet above sea
level, very little error would be
introduced in the selection of a cooling
coil. For altitudes above 1,500 feet
above sea level, the coil must be
selected using SCFM. The relationship
between ACFM and SCFM is shown by
the following equation:
SCFM = ACFM x (Actual Density
÷ 0.075)
The term “0.075 ÷ Actual Density” is
referred to as the density correction
factor, herein called the “Factor.” This
factor can be found in Table PAF-1. The
previous equation can then be
rewritten as:

5
The entering air temperatures, both
wet bulb and dry bulb, must also be
considered when selecting a coil. A
majority of units usually use
recirculated air with a percentage of
outside air. The cooling coil must be
selected using the mixed air
temperature entering the coil.
The following example shows how to
calculate the mixed air temperature:
25 percent outside air at 95 F DB/
75 F WB
75 percent recirculated air at 78 F DB/
67 F WB
The mixed dry bulb is simply the
proportional value between the outside
and recirculated dry bulb
temperatures.
.25 x 95 + .75 x 78 = 82.3 F
The mixed wet bulb temperatures
must be calculated using either the
humidity ratio from a psychrometric
chart or from Table SP-2, The enthalpy
of saturated air at various wet bulb
temperatures.
Using Table SP-2, the enthalpy of the
outside air at 75 F WB is 38.62 Btu/lb.
and the recirculated air at 67 F WB is
31.63 Btu/lb., the mixed enthalpy is:
.25 x 38.62 + .75 x 31.63 = 33.38 Btu/lb.
Using this value in Table SP-2, the
interpolated wet bulb temperature is
69.1 F.
So the final mixed temperatures are:
82.3 F DB/69.1 F WB

SCFM = (ACFM ÷ Factor)
Example: A cooling coil must be
selected at 5,000 ft. altitude. The unit
delivers 10,000 ACFM. What is the
SCFM? At 5,000 ft. altitude, the factor
from Table PAF-1 is 1.20, therefore:
SCFM = 10,000 ACFM ÷ 1.20 =
8.333 SCFM

25

Table SP-2 — Enthalpy of Saturated Air at
Various Wet Bulb
Temperatures
Wet
Bulb
Temp.
50
50.5
51
51.5
52
52.5
53
53.5
54
54.5
55
55.5
56
56.5
57
57.5
58
58.5
59
59.5
60
60.5
61
61.5
62
62.5
63
63.5
64
64.5

BTU
per
Pound
20.38
20.64
20.90
21.17
21.45
21.73
22.01
22.29
22.59
22.88
23.18
23.48
23.79
24.10
24.42
24.74
25.06
25.39
25.73
26.06
26.40
26.75
27.10
27.45
27.81
28.17
28.54
28.91
29.29
29.67

Wet
Bulb
Temp.
65
65.5
66
66.5
67
67.5
68
68.5
69
69.5
70
70.5
71
71.5
72
72.5
73
73.5
74
74.5
75
75.5
76
76.5
77
77.5
78
78.5
79
79.5

BTU
Per
Pound
30.05
30.44
30.83
31.23
31.63
32.03
32.44
32.86
33.27
33.70
34.12
34.55
34.99
35.42
35.87
36.31
36.77
37.22
37.68
38.15
38.61
39.09
39.56
40.04
40.53
41.02
41.51
42.01
42.51
43.02

Performance
Adjustment
Factors
Table PAF-1 — Correction Factors for Altitude

Altitude (Feet)
2000’ 2500’ 3000’ 3500’ 4000’
Temp.
Barometric Pressure (In. Hg)
F
39.92  29.38  28.86  28.33  27.82  27.31  26.82  26.32  25.84 
-40
0.79 0.81
0.82
0.84
0.85
0.87
0.88 0.90 0.92
  0
0.87 0.88
0.90
0.92
0.93
0.95
0.97 0.99 1.00
 40
0.94 0.96
0.98
1.00
1.01
1.03
1.05 1.07 1.09
  70
1.00 1.02
1.04
1.06
1.08
1.10
1.12 1.14 1.16
  80
1.02 1.04
1.06
1.08
1.10
1.12
1.14 1.16 1.18
100
1.06 1.08
1.10
1.12
1.14
1.16
1.18 1.20 1.22
120
1.90 1.11
1.13
1.16
1.18
1.20
1.22 1.24 1.27
0’

500’

1000’

1500’

4500’ 5000’

5500’

6000’

25.36  24.9 
0.93 0.95
1.02 1.04
1.11 1.13
1.18 1.20
1.20 1.22
1.25 1.27
1.29 1.31

24.43  29.98 
0.97
0.99
1.06
1.08
1.16
1.18
1.22
1.25
1.25
1.27
1.29
1.32
1.34
1.37

1. Actual ESP = Duct ESP x Factor ÷ Accs. SP
2. Actual BHP = Cat. BHP ÷ Factor
3. Correct BTUH Input = Catalog BTUH Input ÷ Factor
4. Corrected BTUH Output = Corrected BTUH Input x Efficiency

Performance
Data
Table PD-1 — Rooftop Gas Duct Furnace Performance Data — Arrangement A
Input
Output
Temp. Rise
Capacity 10-12
Furnace Type A,B/C,D
Rooftop Arrangement “A”
10 A/B
15 A/B
20 A/B
25 A/B
30 A/B
35 A/B
40 A/B
50 A/B
60 A/B
70 A/B
80 A/B
12 A/B
10 C/D
15 C/D
20 C/D
25 C/D
30 C/D
35 C/D
40 C/D

Rating
BTU/Hr
(kW)
100,000
(29.3)
150,000
(43.9)
200,000
(58.6)
250,000
(73.2)
300,000
(87.8)
350,000
(102.5)
400,000
(117.1)
500,000
(146.4)
600,000
(175.7)
700,000
(205.0)
800,000
(234.3)
1,200,000
(351.4)
100,000
(29.3)
150,000
(43.9)
200,000
(58.6)
250,000
(73.2)
300,000
(87.8)
350,000
(102.5)
400,000
(117.1)

Rating
BTU/Hr
(kW)
80,000
(23.4)
120,000
(35.1)
160,000
(46.9)
200,000
(58.6)
240,000
(70.3)
280,000
(82.0)
320,000
(93.7)
400,000
(117.1)
480,000
(140.6)
560,000
(164.0)
640,000
(187.4)
960,000
(281.1)
79,000
(23.1)
118,500
(34.7)
158,000
(46.3)
197,500
(57.8)
237,000
(69.4)
276,500
(81.0)
316,000
(92.5)

Eff.
%
80
80
80
80
80
80
80
80
80
80
80
80
79
79
79
79
79
79
79

Deg. F
(Deg. C)
Min.
Max.
20
60
(11)
(33)
20
60
(11)
(33)
20
60
(11)
(33)
20
60
(11)
(33)
20
60
(11)
(33)
20
60
(11)
(33)
20
60
(11)
(33)
40
120
(22)
(67)
40
120
(22)
(67)
40
120
(22)
(67)
40
120
(22)
(67)
60
180
(33)
(100)
30
90
(17)
(50)
30
90
(17)
(50)
30
90
(17)
(50)
30
90
(17)
(50)
30
90
(17)
(50)
30
90
(17)
(50)
30
90
(17)
(50)

CFM
(cu. m/s) (cu. m/s)
Min.
Max.
1,235
3,704
(0.583)
(1.748)
1,852
5,556
(0.874)
(2.622)
2,469
7,407
(1.165)
(3.496)
3,086
9,259
(1.457)
(4.370)
3,704
11,111
(1.748)
(5.244)
4,321
12,963
(2.040)
(6.119)
4,938
14,815
(2.331)
(6.993)
3,086
9,269
(1.457)
(4.375)
3,704
11,111
(1.748)
(5.244)
4,321
12,963
(2.040)
(6.119)
4,938
14,815
(2.331)
(6.993)
4,938
14,815
(2.331)
(6.993)
823
2,469
(0.388)
(1.165)
1,219
3,657
(0.575)
(1.726)
1,626
4,876
(0.767)
(2.301)
2,032
6,096
(0.959)
(2.877)
2,438
7,315
(1.151)
(3.453)
2,845
8,534
(1.343)
(4.028)
3,251
9,753
(1.534)
(4.603)

Pressure Drop

in. of Water
(kPa)
(kPa)
Min.
Max.
0.15
1.10
(0.04)
(0.27)
0.15
1.00
(0.04)
(0.25)
0.15
1.05
(0.04)
(0.26)
0.15
1.08
(0.04)
(0.27)
0.15
1.10
(0.04)
(0.27)
0.15
1.11
(0.04)
(0.28)
0.15
1.12
(0.04)
(0.28)
0.30
2.16
(0.07)
(0.54)
0.30
2.20
(0.07)
(0.55)
0.30
2.22
(0.07)
(0.55)
0.30
2.24
(0.07)
(0.56)
0.45
3.36
(0.11)
(0.84)
0.10
0.88
(0.02)
(0.22)
0.10
0.78
(0.02)
(0.19)
0.10
0.81
(0.02)
(0.20)
0.10
0.85
(0.02)
(0.21)
0.10
0.86
(0.02)
(0.21)
0.10
0.87
(0.02)
(0.22)
0.10
0.88
(0.02)
(0.22)

Nat. Gas
Inlet
in.
1
/2

L.P. Gas
Inlet
in.
1
/2

/2

1

/2

/2

1

1

/2

1

/4

1

/4

1

/4

1

/4

1

/4

1

/4

1

/4

1

/4

1

/4

1

3

3

3

3

3

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

/2

1

/2

/2

1

/2

1

1

/2

1

/2

1

/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Ratings shown are for elevations up to 2000 feet (610 m) above sea level. Above 2000 feet (610 m), input must be derated four percent for each 1000 feet (305 m)
above sea level.

26

Performance
Data
Chart PD-1 — Duct Furnace Performance
Furnace Type — (A, B)

Standard Temperature Rise Duct Furnace Performance
Furnace Type — (A, B)
20-60 F Rise/Furnace
80% Efficiency
Chart PD-2 — Duct Furnace Performance
Furnace Type — (C, D)

High Temperature Rise Duct Furnace Performance
Furnace Type — (C, D)
60-90 F Rise/Furnace
79% Efficiency

27

Performance
Data
Table PD-2 — Rooftop Gas Heating Units Performance Data — Furnace Type (A,B) Standard Temperature Rise —
Rooftop Arrangement B,C,D,E

Capacity
TOTAL EXTERNAL STATIC PRESSURE (INCHES OF WATER)
Furnace TR
Input Output
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Type
(F)
CFM BTU/H BTU/H RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
61 1,200 100,000 80,000 575 0.16 705 0.23 825 0.31 940 0.4 1040 0.5 1135 0.6 1220 0.7 1300 0.8 1375 0.91 1440 1.02
49 1,500
655 0.26 765 0.35 870 0.44 965 0.54 1060 0.64 1150 0.75 1235 0.87 1315 0.99 1390 1.12 1460 1.24
10-A,B 37 2,000
795 0.55 890 0.65 975 0.77 1055 0.88 1130
1 1205 1.12 1280 1.25 1355 1.39 1425 1.54 1490 1.68
29 2,500
950 1.01 1030 1.12 1105 1.25 1175 1.39 1240 1.54 1305 1.68 1365 1.83 1425 1.98 1485 2.13 1545 2.29
25 3,000
1110 1.68 1175 1.82 1240 1.95 1305 2.1 1365 2.27 1420 2.44 1475 2.62 1530 2.79 1580 2.97 1635 3.14
21 3,500
1270 2.59 1330 2.77 1385 2.93 1440 3.08 1495 3.25 1550 3.43 1600 3.63 1650 3.83 1695 4.04 1745 4.25
55 2,000 150,000 120,000 685 0.44 785 0.54 880 0.63 965 0.75 1045 0.87 1120 0.98 1195 1.11 1270 1.24 1345 1.37 1415 1.52
44 2,500
805 0.78 890 0.91 970 1.04 1045 1.15 1120 1.28 1190 1.43 1255 1.57 1320 1.72 1380 1.86 1440 2.01
15-A,B 37 3,000
935 1.28 1005 1.44 1075 1.6 1140 1.75 1205 1.88 1270 2.02 1335 2.18 1390 2.35 1450 2.53 1500 2.7
32 3,500
1065 1.97 1130 2.15 1190 2.33 1250 2.52 1305 2.7 1360 2.87 1420 3.02 1475 3.17 1525 3.35 1580 3.55
28 4,000
1200 2.88 1255 3.08 1310 3.28 1365 3.49 1415 3.7 1465 3.91 1515 4.12 1565 4.3 1615 4.48 1660 4.65
25 4,500
1340 4.04 1390 4.26 1435 4.49 1485 4.72 1530 4.95
59 2,500 200,000 160,000 555 0.44 650 0.55 740 0.66 820 0.78 895 0.89 965 1.02 1035 1.14 1105 1.28 1170 1.41 1230 1.56
49 3,000
630 0.71 710 0.83 790 0.96 865 1.1 935 1.23 1000 1.37 1065 1.52 1125 1.66 1180 1.81 1240 1.96
20-A,B 37 4,000
790 1.58 855 1.72 915 1.86 975 2.03 1035 2.21 1090 2.39 1145 2.57 1200 2.76 1250 2.94 1300 3.13
29 5,000
965 2.98 1010 3.15 1060 3.32 1110 3.5 1160 3.7 1205 3.9 1255 4.12 1300 4.35 1345 4.57 1390 4.8
27 5,500
1050 3.92 1095 4.11 1135 4.3 1180 4.49 1225 4.7 1270 4.91
61 3,000 250,000 200,000 615 0.69 695 0.8 775 0.93 850 1.07 920 1.21 985 1.34 1050 1.49 1110 1.63 1170 1.78 1225 1.93
53 3,500
690 1.05 760 1.17 830 1.31 900 1.46 965 1.62 1025 1.78 1085 1.94 1140 2.11 1195 2.27 1250 2.44
25-A,B 46 4,000
770 1.53 830 1.66 895 1.81 955 1.97 1015 2.14 1070 2.32 1125 2.51 1180 2.69 1235 2.87 1285 3.06
41 4,500
855 2.13 905 2.29 960 2.44 1015 2.61 1070 2.79 1125 2.98 1175 3.19 1225 3.39 1275 3.6 1320 3.8
37 5,000
940 2.88 985 3.05 1030 3.23 1080 3.4 1130 3.59 1180 3.79 1230
4 1275 4.22 1320 4.45 1365 4.68
34 5,500
1025 3.8 1065 3.98 1110 4.17 1150 4.36 1195 4.56 1240 4.77 1285 4.98
60 3,700 300,000 240,000 655 0.73 760 0.91 860 1.11 945 1.32 1030 1.54 1110 1.76 1190 2.01 1270 2.26 1345 2.53 1415 2.81
55 4,000
690 0.89 790 1.09 885 1.28 970 1.51 1050 1.74 1125 1.98 1200 2.22 1275 2.48 1345 2.76 1415 3.05
30-A,B 44 5,000
815 1.59 895 1.85 975 2.1 1055 2.32 1125 2.58 1195 2.88 1260 3.17 1325 3.46 1385 3.75 1445 4.05
37 6,000
945 2.6 1015 2.91 1080 3.23 1150 3.53 1215 3.79 1280 4.07 1340 4.39 1400 4.74
34 6,500
1010 3.25 1075 3.58 1140 3.92 1200 4.26 1260 4.58 1320 4.86
32 7,000
1075
4 1140 4.35 1200 4.71
57 4,500 350,000 280,000 535 0.7 640 0.9 730 1.11 815 1.32 890 1.55 970 1.78 1040 2.02 1110 2.28 1175 2.55 1235 2.82
52 5,000
575 0.91 670 1.13 755 1.36 835 1.59 910 1.83 980 2.08 1050 2.33 1115 2.6 1180 2.88 1240 3.16
35-A,B 43 6,000
650 1.48 735 1.72 810 1.99 880 2.26 950 2.54 1015 2.82 1080 3.1 1140 3.39 1195 3.69 1255
4
37 7,000
735 2.25 805 2.51 875 2.81 940 3.12 1000 3.44 1060 3.76 1120 4.09 1175 4.41 1230 4.74
32 8,000
820 3.27 880 3.56 940 3.87 1000 4.21 1060 4.57 1115 4.94
30 8,500
860 3.88 920 4.18 980 4.51 1035 4.86
59 5,000 400,000 320,000 560 0.89 655 1.1 745 1.33 825 1.56 900 1.8 970 2.04 1040 2.3 1105 2.56 1170 2.84 1230 3.12
45 6,500
675 1.78 750 2.03 825 2.3 895 2.6 960 2.9 1025 3.2 1085 3.5 1145 3.8 1200 4.12 1255 4.44
40-A,B 42 7,000
715 2.19 785 2.44 855 2.73 920 3.04 985 3.36 1045 3.68 1105
4 1160 4.33 1215 4.66 1270 4.99
37 8,000
800 3.18 860 3.46 920 3.76 980 4.09 1040 4.45 1095 4.81
35 8,500
840 3.77 895 4.07 955 4.38 1015 4.72
123 3,000 500,000 400,000 645 0.73 730 0.85 805 0.99 880 1.12 950 1.26 1015 1.4 1075 1.55 1135 1.69 1195 1.84 1250 1.99
105 3,500
730 1.12 800 1.25 870 1.39 935 1.55 1000 1.71 1060 1.87 1115 2.03 1175 2.2 1225 2.36 1280 2.53
50-A,B 92 4,000
815 1.63 875 1.77 940 1.92 1000 2.09 1055 2.27 1110 2.46 1165 2.64 1220 2.82 1270 3.01 1320 3.19
82 4,500
900 2.27 955 2.43 1010 2.59 1065 2.77 1120 2.97 1170 3.17 1220 3.37 1270 3.58 1320 3.78 1365 3.99
74 5,000
990 3.07 1040 3.25 1085 3.42 1135 3.61 1185 3.81 1235 4.03 1280 4.25 1325 4.47 1370 4.7 1415 4.93
67 5,500
1080 4.05 1120 4.23 1165 4.43 1210 4.63 1255 4.84
120 3,700 600,000 480,000 700 0.82 805 0.99 900 1.2 985 1.42 1065 1.64 1145 1.87 1225 2.12 1305 2.38 1375 2.65 1450 2.94
111 4,000
740
1 840 1.18 930 1.4 1010 1.63 1090 1.86 1165 2.1 1240 2.36 1310 2.63 1385 2.91 1455 3.2
60-A,B 88 5,000
880 1.79 960 2.05 1035 2.27 1110 2.53 1180 2.82 1250 3.11 1310 3.4 1370 3.69 1430 3.99 1490 4.29
74 6,000
1025 2.95 1090 3.27 1155 3.57 1220 3.83 1285 4.11 1345 4.43 1405 4.78
68 6,500
1095 3.69 1160 4.03 1220 4.37 1280 4.67 1340 4.95
115 4,500 700,000 560,000 590 0.8 685 1.01 770 1.22 855 1.43 930 1.66 1005 1.9 1075 2.15 1140 2.41 1205 2.68 1265 2.96
103 5,000
630 1.04 720 1.27 805 1.5 880 1.74 950 1.98 1020 2.23 1090 2.49 1155 2.76 1215 3.05 1275 3.34
70-A,B 86 6,000
720 1.68 800 1.95 870 2.22 940 2.5 1005 2.78 1070 3.06 1130 3.35 1190 3.65 1245 3.96 1300 4.27
74 7,000
815 2.55 885 2.85 950 3.17 1010 3.49 1070 3.81 1130 4.13 1185 4.46 1240 4.79
65 8,000
910 3.7 970 4.03 1030 4.38 1085 4.75
118 5,000 800,000 640,000 605 0.98 695 1.21 780 1.44 860 1.67 935 1.91 1005 2.16 1070 2.42 1135 2.69 1200 2.97 1260 3.26
80-A,B 98 6,000
690 1.59 770 1.84 845 2.12 915 2.39 980 2.67 1045 2.95 1105 3.24 1165 3.53 1225 3.84 1280 4.15
84 7,000
780 2.41 850 2.7 915 3.01 980 3.33 1040 3.65 1100 3.97 1155 4.29 1210 4.62 1265 4.96
74 8,000
870 3.51 930 3.81 990 4.15 1050 4.51 1105 4.87
Notes:
1. Refer to Accessory Pressure Loss table.
2. Values are based on the “Basic Packaged Unit” which includes pressure drop of the duct furnace(s) and “system effect” of the blower module.
3. Brake horsepower (BHP) includes drive losses.
4. Unit leaving air temperature is limited to 150 F (66 C) and is equal to: Entering Air Temperature + Duct Furnace(s) Temperature Rise.
5. “Total External Pressure” is the sum of the unit’s “Internal” accessory pressure loss(es) plus the external static pressure.
6. Ratings shown are for elevations between 0 and 2000 ft. (610 m). For unit installation in the U.S.A. above 2000 ft. (610 m), the unit input must be derated 4%
for each 1000 ft. (305 m) above sea level; refer to local codes, or in absence of local codes, refer to the National Fuel Gas Code, ANSI Standard Z223.1-1992
(N.F.P.A. No. 54), or the latest edition.
For installation in Canada, any references to deration at altitudes in excess of 2000 ft. (610 m) are to be ignored. At altitudes of 2000 to 4500 ft. (610 to 1372 m),
the unit must be derated to 90% of the normal rating, and be so marked in accordance with the C.G.A. certification.

28

Performance
Data
Table PD-3 — Rooftop Gas Heating Units Performance Data — Furnace Type C,D — High Temperature Rise —
Rooftop Arrangement B,C,D,E
Capacity
Furnace TR
Type
(F)
91
81
10-C,D 73
66
61
91
15-C,D 78
68
61
91
81
20-C,D 73
66
61
91
81
25-C,D 73
66
61
91
81
30-C,D 73
66
61
91
82
35-C,D 75
69
64
61
91
81
40-C,D 73
66
61

Input Output
0.2
CFM BTU/H BTU/H RPM BHP
  800 100,000 79,000 550 .09
  900
575 .11
1,000
605 .14
1,100
635 .17
1,200
670 .21
1,200 150,000 118,500 580 .16
1,400
630 .23
1,600
685 .31
1,800
740 .42
1,600 200,000 158,000 500 .19
1,800
530 .24
2,000
560 .31
2,200
595 .40
2,400
635 .49
2,000 250,000 197,500 540 .30
2,250
580 .39
2,500
625 .51
2,750
665 .66
3,000
710 .83
2,400 300,000 237,000 585 .33
2,700
625 .43
3,000
665 .54
3,300
705 .69
3,600
750 .86
2,800 350,000 276,500 485 .30
3,100
510 .37
3,400
535 .46
3,700
560 .56
4,000
590 .67
4,200
605 .76
3,200 400,000 316,000 500 .38
3,600
535 .50
4,000
570 .64
4,400
605 .80
4,800
640 1.00

0.4
RPM BHP
710 .15
730 .18
745 .21
770 .25
795 .29
705 .23
745 .31
795 .40
845 .52
615 .26
640 .33
665 .41
695 .50
725 .60
645 .39
680 .50
715 .63
750 .78
790 .96
710 .47
740 .58
775 .72
815 .87
850 1.05
610 .44
625 .52
645 .62
665 .73
690 .86
705 .95
620 .53
645 .66
670 .82
700 1.01
730 1.22

TOTAL EXTERNAL STATIC PRESSURE (INCHES OF WATER)
0.6
0.8
1
1.2
1.4
1.6
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
840 .22 950 .29 1045 .37 1135 .45 1210 .53 1285 .61
855 .25 965 .33 1065 .41 1150 .50 1230 .58 1305 .67
870 .29 980 .37 1080 .46 1165 .55 1245 .64 1320 .74
890 .33 995 .42 1095 .51 1180 .61 1260 .71 1335 .81
910 .38 1015 .47 1110 .57 1195 .67 1280 .77 1355 .88
830 .31 940 .40 1045 .50 1135 .60 1220 .70 1300 .80
855 .39 960 .49 1055 .59 1150 .70 1235 .81 1315 .93
890 .50 985 .60 1075 .70 1160 .82 1245 .94 1325 1.07
935 .62 1020 .73 1100 .84 1180 .96 1260 1.09 1340 1.22
720 .35 815 .44 900 .54 980 .64 1055 .76 1130 .88
735 .42 830 .51 915 .62 990 .73 1060 .84 1130 .96
755 .50 845 .60 925 .71 1000 .83 1075 .95 1140 1.07
780 .60 860 .71 940 .82 1015 .94 1085 1.07 1150 1.19
805 .71 885 .83 955 .95 1030 1.07 1095 1.20 1160 1.34
740 .48 825 .58 910 .69 985 .80 1060 .92 1125 1.05
765 .60 850 .71 925 .82 1000 .94 1070 1.07 1140 1.20
795 .74 875 .86 945 .98 1015 1.10 1085 1.23 1150 1.37
830 .90 905 1.03 970 1.16 1035 1.29 1100 1.43 1160 1.57
865 1.10 935 1.23 1000 1.37 1065 1.51 1125 1.66 1180 1.81
835 .63 945 .81 1045 1.00 1140 1.20 1225 1.41 1305 1.62
850 .75 960 .94 1055 1.14 1150 1.36 1235 1.58 1315 1.80
875 .90 975 1.09 1070 1.30 1160 1.53 1245 1.76 1325 2.00
905 1.07 1000 1.27 1085 1.49 1175 1.72 1255 1.97 1335 2.22
940 1.26 1025 1.47 1110 1.70 1190 1.94 1270 2.20 1345 2.46
720 .60 815 .77 905 .96 990 1.17 1070 1.40 1145 1.63
730 .69 825 .87 910 1.07 990 1.28 1070 1.51 1140 1.75
745 .79 840 .98 920 1.19 1000 1.40 1070 1.63 1140 1.88
760 .91 850 1.11 935 1.32 1010 1.55 1080 1.78 1145 2.03
780 1.05 865 1.26 945 1.48 1020 1.71 1090 1.95 1155 2.20
790 1.15 875 1.36 950 1.59 1025 1.82 1095 2.07 1160 2.33
725 .70 820 .88 905 1.08 985 1.29 1060 1.52 1130 1.76
740 .84 830 1.04 915 1.24 995 1.46 1065 1.69 1135 1.94
760 1.01 845 1.22 930 1.43 1005 1.66 1075 1.90 1145 2.15
785 1.21 865 1.43 945 1.66 1020 1.90 1090 2.15 1155 2.41
815 1.44 890 1.67 960 1.91 1035 2.16 1100 2.42 1165 2.69

1.8
RPM BHP
1355 .69
1375 .76
1390 .83
1410 .91
1425 .99
1375 .91
1385 1.05
1400 1.19
1410 1.36
1200 1.00
1200 1.09
1205 1.20
1215 1.33
1225 1.48
1190 1.18
1200 1.33
1210 1.51
1225 1.72
1240 1.96
1375 1.83
1390 2.04
1395 2.25
1405 2.48
1415 2.74
1215 1.87
1210 2.00
1210 2.14
1210 2.29
1220 2.47
1225 2.60
1205 2.01
1200 2.20
1205 2.42
1215 2.68
1230 2.97

RPM
1420
1440
1455
1475
1490
1445
1460
1470
1480
1270
1265
1265
1270
1285
1250
1260
1270
1280
1295
1445
1460
1470
1475
1485
1280
1280
1275
1275
1280
1285
1270
1265
1265
1275
1285

2
BHP
.78
.86
.93
1.01
1.10
1.02
1.17
1.33
1.50
1.13
1.23
1.34
1.47
1.62
1.31
1.47
1.66
1.87
2.12
2.05
2.27
2.50
2.75
3.02
2.12
2.26
2.41
2.57
2.75
2.88
2.28
2.47
2.69
2.96
3.26

Notes:
1. Refer to Accessory Pressure Loss table.
2. Values are based on the “Basic Packaged Unit” which includes pressure drop of the duct furnace(s) and “system effect” of the blower module.
3. Brake horsepower (BHP) includes drive losses.
4. Unit leaving air temperature is limited to 150 F (66 C) and is equal to: Entering Air Temperature + Duct Furnace(s) Temperature Rise.
5. “Total External Pressure” is the sum of the unit’s “Internal” accessory pressure loss(es) plus the external static pressure.
6. Ratings shown are for elevations between 0 and 2000 ft. (610 m). For unit installation in the U.S.A. above 2000 ft. (610 m), the unit input must be derated 4%
for each 1000 ft. (305 m) above sea level; refer to local codes, or in absence of local codes, refer to the National Fuel Gas Code, ANSI Standard Z223.1-1992
(N.F.P.A. No. 54), or the latest edition.
For installation in Canada, any references to deration at altitudes in excess of 2000 ft. (610 m) are to be ignored. At altitudes of 2000 to 4500 ft. (610 to 1372 m),
the unit must be derated to 90% of the normal rating, and be so marked in accordance with the C.G.A. certification.

29

Performance
Data
Table PD-4 — Rooftop Gas Heating Units Accessory Pressure Loss Data — Rooftop Arrangements B,C,D,E

Capacity

10

15

20

25

30

CFM
800
900
1,100
1,200
1,500
2,000
2,500
3,000
3,500
1,200
1,400
1,600
1,800
2,000
2,500
3,000
3,500
4,000
4,500
1,600
1,800
2,000
2,200
2,400
2,500
3,000
4,000
5,000
5,500
2,000
2,250
2,500
2,750
3,000
4,000
4,500
5,000
5,500
2,400
2,700
3,000
3,300
3,600
4,000
5,000
6,000
6,500
7,000

Rainhood
With
Throwaway
Screen Mstr.Elim.
2”
<.01  
.01
.03
.01
.01
.03
.02
.02
.04
.02
.02
.05
.03
.04
.06
.05
.07
.09
.08
.11
.12
.11
.15
.16
.16
.21
.19
.02
.02
.05
.03
.03
.06
.03
.04
.07
.04
.05
.08
.05
.07
.09
.08
.11
.12
.11
.15
.16
.16
.21
.19
.20
.27
.26
.34
.02
.02
.05
.02
.03
.06
.02
.03
.07
.03
.04
.08
.03
.05
.09
.04
.05
.09
.05
.07
.12
.09
.13
.17
.15
.20
.18
.25
.02
.03
.07
.03
.04
.08
.04
.05
.09
.04
.06
.10
.05
.07
.12
.09
.13
.17
.12
.16
.15
.20
.18
.25
.02
.03
.06
.02
.03
.07
.03
.04
.08
.04
.05
.09
.04
.06
.10
.05
.08
.12
.09
.12
.16
.12
.17
.14
.20
.17
.23

Pressure Loss (Inches of Water)
Filters
Supply
Washable
Pleated
Air
1”
2”
1”
2”
Plenum
<.01  
<.01  
.03
.01
.02
<.01  
<.01  
.03
.02
.02
<.01  
<.01  
.04
.02
.03
<.01  
<.01  
.05
.03
.04
.01
.02
.07
.04
.06
.02
.03
.12
.07
.10
.03
.04
.17
.10
.15
.04
.06
.23
.14
.22
.06
.08
.30
.18
.29
<.01  
<.01  
.05
.03
.03
<.01  
.01
.06
.03
.03
.01
.02
.08
.04
.04
.02
.02
.10
.05
.06
.02
.03
.12
.07
.07
.03
.04
.17
.10
.11
.04
.06
.23
.14
.15
.06
.08
.30
.18
.21
.07
.11
.38
.23
.27
.09
.14
.34
<.01  
.01
.06
.03
.02
<.01  
.01
.07
.04
.03
.01
.02
.08
.04
.03
.01
.02
.09
.05
.04
.02
.02
.11
.06
.05
.02
.03
.12
.07
.05
.03
.04
.16
.09
.07
.05
.07
.26
.16
.13
.07
.11
.38
.23
.21
.09
.13
.44
.28
.25
.01
.02
.08
.04
.02
.02
.02
.10
.05
.03
.02
.03
.12
.07
.04
.02
.03
.14
.08
.04
.03
.04
.16
.09
.05
.05
.07
.26
.16
.09
.06
.09
.31
.19
.12
.07
.11
.38
.23
.14
.09
.13
.44
.28
.17
.01
.01
.07
.04
.02
.01
.02
.09
.05
.03
.02
.02
.10
.06
.03
.02
.03
.12
.07
.04
.02
.03
.14
.08
.05
.03
.04
.17
.10
.06
.04
.06
.24
.14
.09
.06
.09
.33
.20
.13
.07
.11
.38
.23
.16
.09
.13
.43
.27
.18

30

Evaporative
Media
8”
12”
.01
.02
.02
.02
.02
.04
.03
.04
.04
.07
.08
.12
.12
.18
.17
.26
.24
.35
.03
.04
.04
.06
.05
.07
.06
.09
.08
.12
.12
.18
.17
.26
.24
.35
N/A
N/A
N/A
N/A
.02
.03
.02
.03
.03
.04
.03
.05
.04
.06
.04
.07
.06
.10
.11
.17
.18
.27
.22
.32
.03
.04
.04
.05
.04
.07
.05
.08
.06
.10
.11
.17
.15
.22
.18
.27
.22
.32
.03
.04
.03
.05
.04
.06
.05
.07
.06
.09
.07
.11
.11
.17
.16
.24
.19
.29
.22
.33

Return or Outside
Air
Damper
.01
.02
.03
.03
.05
.09
.13
.19
.25
.03
.04
.06
.07
.09
.13
.19
.25
.33
.42
.03
.03
.04
.05
.05
.06
.08
.15
.23
.28
.04
.05
.06
.07
.08
.15
.19
.23
.28
.03
.04
.05
.06
.07
.08
.13
.19
.22
.25

Performance
Data
Table PD-4 (Continued) — Rooftop Gas Heating Units Accessory Pressure Loss Data — Rooftop Arrangements B,C,D,E

Capacity

35

40

50

60

70

80

CFM
2,800
3,100
3,400
3,700
4,000
5,000
6,000
7,000
8,000
9,000
3,200
3,600
4,000
4,400
4,800
5,000
6,000
7,000
8,000
8,500
3,000
3,500
4,000
4,500
5,000
5,500
3,700
4,000
5,000
6,000
6,500
4,500
5,000
6,000
7,000
8,000
5,000
6,000
7,000
8,000

Rainhood
With
Throwaway
Screen Mstr.Elim.
2”
.03
.04
.07
.03
.05
.08
.04
.06
.10
.05
.07
.11
.05
.08
.12
.09
.12
.16
.12
.17
.17
.23
.22
.31
.28
.39
.03
.04
.07
.04
.05
.09
.04
.06
.10
.05
.07
.11
.06
.09
.13
.07
.10
.13
.10
.14
.17
.13
.19
.17
.24
.20
.28
.05
.07
.12
.07
.10
.14
.09
.13
.17
.12
.16
.15
.20
.18
.25
.05
.07
.11
.05
.08
.12
.09
.12
.16
.12
.17
.14
.20
.07
.10
.14
.09
.12
.16
.12
.17
.17
.23
.22
.31
.07
.10
.13
.10
.14
.17
.13
.19
.17
.24

Pressure Loss (Inches of Water)
Filters
Supply
Washable
Pleated
Air
1”
2”
1”
2”
Plenum
.01
.02
.09
.05
.02
.02
.02
.11
.06
.03
.02
.03
.13
.07
.04
.02
.03
.15
.08
.04
.03
.04
.17
.10
.05
.04
.06
.24
.14
.08
.06
.09
.33
.20
.11
.09
.13
.43
.27
.15
.11
.16
.19
.24
.01
.02
.09
.05
.02
.02
.02
.11
.06
.03
.02
.03
.13
.07
.04
.03
.04
.15
.09
.05
.03
.04
.18
.10
.05
.03
.05
.19
.11
.06
.05
.07
.26
.16
.08
.07
.09
.33
.21
.11
.09
.12
.42
.26
.15
.10
.14
.17
.03
.04
.16
.09
.05
.04
.05
.21
.12
.07
.05
.07
.26
.16
.09
.06
.09
.31
.19
.12
.07
.11
.38
.23
.14
.09
.13
.44
.28
.17
.02
.03
.15
.08
.05
.03
.04
.17
.10
.06
.04
.06
.24
.14
.09
.06
.09
.33
.20
.13
.07
.11
.38
.23
.16
.04
.05
.20
.12
.06
.04
.06
.24
.14
.08
.06
.09
.33
.20
.11
.09
.13
.43
.27
.15
.11
.16
.19
.03
.05
.19
.11
.06
.05
.07
.26
.16
.08
.07
.09
.33
.21
.11
.09
.12
.42
.26
.15

31

Evaporative
Media
8”
12”
.04
.05
.04
.07
.05
.08
.06
.09
.07
.11
.11
.17
.16
.24
.22
.33
.29
.44
N/A
N/A
.04
.06
.05
.07
.06
.09
.07
.11
.09
.13
.09
.14
.14
.20
.18
.27
.24
.36
.27
.41
.06
.10
.09
.13
.11
.17
.15
.22
.18
.27
.22
.32
.06
.09
.07
.11
.11
.17
.16
.24
.19
.29
.09
.14
.11
.17
.16
.24
.22
.33
.29
.44
.09
.14
.14
.20
.18
.27
.24
.36

Return or Outside
Air
Damper
.04
.05
.06
.07
.08
.13
.19
.25
.33
.42
.04
.05
.07
.08
.10
.10
.15
.20
.26
.30
.08
.11
.15
.19
.23
.28
.07
.08
.13
.19
.22
.11
.13
.19
.25
.33
.10
.15
.20
.26

Performance
Data
Table PD-5 — Rooftop Gas Heating Units Performance Data - Furnace Type (A,B) - Standard Temperature Rise - Rooftop Arrangement G,J
Capacity
Furnace TR
Type
(F)
59
49
37
20-A,B 29
25
23
21
20
59
46
25-A,B 37
31
26
25
60
55
30-A,B 37
28
22
20
57
43
35-A,B 32
26
22
20
59
49
40-A,B 37
29
25
21
119
92
50-A,B 74
61
53
49
120
111
60-A,B 74
55
44
40
115
86
70-A,B 65
52
43
40
118
98
80-A,B 74
59
49
44
161
147
126
12-A,B 111
88
74
68

CFM
2,500
3,000
4,000
5,000
6,000
6,500
7,000
7,400
3,100
4,000
5,000
6,000
7,000
7,500
3,700
4,000
6,000
8,000
10,000
11,000
4,500
6,000
8,000
10,000
12,000
13,000
5,000
6,000
8,000
10,000
12,000
14,000
3,100
4,000
5,000
6,000
7,000
7,500
3,700
4,000
6,000
8,000
10,000
11,000
4,500
6,000
8,000
10,000
12,000
13,000
5,000
6,000
8,000
10,000
12,000
13,500
5,500
6,000
7,000
8,000
10,000
12,000
13,000

Input Output
0.2
BTU/H BTU/H RPM BHP
200,000 160,000 425 .36
490 .59
630 1.30
770 2.46
915 4.18
990 5.27
1060 6.55
1120 7.71
250,000 200,000 495 .62
620 1.26
755 2.39
895 4.05
1040 6.35
1110 7.77
300,000 240,000 415 .47
430 .56
560 1.51
710 3.29
860 6.18
940 8.12
350,000 280,000 405 .58
500 1.22
645 2.70
790 5.10
935 8.66
1010 10.95
400,000 320,000 430 .73
495 1.18
630 2.62
775 4.96
920 8.42
1065 13.22
500,000 400,000 515 .66
640 1.34
785 2.54
935 4.30
1080 6.76
1155 8.28
600,000 480,000 455 .55
480 .66
640 1.83
810 4.00
985 7.49
1075 9.83
700,000 560,000 445 .67
545 1.39
695 3.06
850 5.75
1005 9.74
1085 12.30
800,000 640,000 460 .82
525 1.31
670 2.88
820 5.45
975 9.24
1090 13.03
1,200,000 960,000 530 1.16
565 1.46
640 2.21
715 3.20
875 6.01
1035 10.16
1115 12.81

0.4
RPM BHP
495 .46
540 .68
660 1.41
795 2.59
940 4.34
1010 5.45
1080 6.74
1140 7.92
540 .72
650 1.37
785 2.52
920 4.21
1060 6.55
1130 7.99
505 .65
520 .76
630 1.79
760 3.64
900 6.59
975 8.57
490 .76
555 1.43
675 2.93
815 5.37
960 8.98
1030 11.29
500 .92
545 1.38
665 2.85
800 5.23
945 8.74
1085 13.60
565 .76
675 1.45
810 2.67
955 4.46
1100 6.94
1175 8.48
545 .74
560 .86
700 2.12
855 4.38
1025 7.96
1110 10.35
525 .85
610 1.63
735 3.35
880 6.09
1030 10.13
1110 12.71
535 1.01
585 1.54
710 3.15
850 5.75
995 9.58
1110 13.41
595 1.38
625 1.70
690 2.49
760 3.50
905 6.37
1060 10.57
1140 13.25

TOTAL EXTERNAL STATIC PRESSURE (INCHES OF WATER)
0.6
0.8
1
1.2
1.4
1.6
1.8
2
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
565 .55 635 .67 700 .80 760 .93 820 1.07 875 1.21 925 1.35 975 1.50
600 .80 660 .92 720 1.05 775 1.19 830 1.35 885 1.51 930 1.67 980 1.84
700 1.54 740 1.68 785 1.84 830 2.00 875 2.16 920 2.32 965 2.49 1005 2.68
825 2.73 850 2.88 880 3.05 915 3.24 950 3.43 990 3.63 1025 3.83 1065 4.02
960 4.50 980 4.66 1000 4.84 1025 5.02 1050 5.23 1080 5.44 1110 5.67 1140 5.90
1030 5.62 1050 5.80 1070 5.98 1090 6.17 1110 6.37 1135 6.59 1160 6.82 1185 7.06
1100 6.93 1115 7.12 1135 7.31 1155 7.50 1175 7.71 1195 7.93 1215 8.16 1240 8.41
1155 8.12 1175 8.31 1190 8.51 1205 8.71 1225 8.92 1245 9.15 1265 9.38 1285 9.62
595 .83 655 .95 715 1.08 770 1.22 820 1.37 875 1.54 925 1.71 970 1.87
685 1.49 725 1.63 770 1.79 815 1.95 860 2.10 905 2.26 950 2.43 990 2.61
810 2.66 835 2.80 865 2.96 895 3.13 930 3.32 970 3.52 1005 3.72 1045 3.92
945 4.37 965 4.53 985 4.70 1010 4.88 1030 5.07 1060 5.27 1085 5.49 1115 5.72
1080 6.74 1100 6.92 1115 7.11 1135 7.30 1155 7.50 1170 7.70 1195 7.92 1215 8.15
1150 8.19 1165 8.39 1185 8.59 1200 8.79 1215 9.00 1235 9.21 1250 9.43 1270 9.66
590 .86 665 1.08 740 1.33 815 1.60 885 1.89 950 2.19 1010 2.51 1065 2.82
600 .97 675 1.20 745 1.45 815 1.72 880 2.02 945 2.33 1005 2.65 1065 2.99
690 2.08 750 2.38 805 2.69 860 3.01 910 3.34 960 3.68 1010 4.03 1055 4.40
810 4.01 860 4.40 905 4.79 950 5.19 995 6.00 1035 5.99 1075 6.41 1115 6.83
945 7.03 985 7.48 1025 7.95 1065 8.44 1100 8.93 1140 9.42 1175 9.92 1210 10.42
1015 9.04 1050 9.52 1085 10.03 1125 10.55 1160 11.08 1195 11.61 1230 12.16 1260 12.70
565 .96 640 1.19 705 1.43 765 1.68 825 1.93 880 2.19 930 2.46 975 2.74
615 1.66 675 1.90 735 2.16 790 2.46 845 2.78 895 3.10 945 3.43 990 3.75
715 3.20 760 3.51 805 3.83 850 4.14 895 4.45 940 4.79 985 5.15 1025 5.55
840 5.67 870 5.99 905 6.35 940 6.74 980 7.14 1015 7.53 1050 7.92 1085 8.31
980 9.31 1000 9.66 1025 10.04 1050 10.44 1080 10.87 1110 11.32 1140 11.79 1170 12.27
1050 11.64 1070 12.01 1090 12.39 1115 12.80 1140 13.24 1165 13.71 1190 14.19 1215 14.69
570 1.12 640 1.35 705 1.61 765 1.88 820 2.15 875 2.43 925 2.71 975 3.00
605 1.62 665 1.85 725 2.11 780 2.40 835 2.72 885 3.04 935 3.36 985 3.69
700 3.10 745 3.40 790 3.72 835 4.03 880 4.34 925 4.67 970 5.02 1010 5.41
825 5.51 855 5.82 885 6.16 920 6.54 960 6.93 995 7.33 1030 7.72 1070 8.11
965 9.07 985 9.40 1010 9.75 1030 10.14 1060 10.55 1085 10.98 1115 11.44 1145 11.92
1105 13.97 1120 14.35 1140 14.73
625 .89 680 1.01 740 1.14 790 1.29 845 1.45 895 1.61 945 1.78 990 1.95
715 1.59 755 1.74 805 1.90 850 2.06 895 2.21 935 2.38 980 2.56 1020 2.76
840 2.82 870 2.98 900 3.16 935 3.35 975 3.55 1010 3.74 1045 3.94 1085 4.13
975 4.63 1000 4.80 1020 4.98 1045 5.18 1075 5.40 1105 5.62 1135 5.86 1165 6.10
1120 7.13 1135 7.32 1155 7.52 1175 7.73 1195 7.95 1215 8.18 1240 8.42 1265 8.68
1190 8.68 1205 8.88 1225 9.08 1240 9.30 1260 9.52 1280 9.76
625 .95 700 1.19 775 1.45 845 1.73 915 2.02 975 2.33 1035 2.65 1090 2.97
640 1.09 710 1.33 780 1.59 850 1.87 915 2.18 975 2.50 1035 2.83 1090 3.16
755 2.42 810 2.73 865 3.05 915 3.38 965 3.72 1015 4.08 1065 4.45 1110 4.83
905 4.78 950 5.17 990 5.57 1035 5.98 1075 6.39 1115 6.81 1155 7.24 1195 7.68
1065 8.45 1100 8.94 1140 9.43 1175 9.92 1210 10.42 1245 10.93 1280 11.43 1310 11.95
1145 10.87 1180 11.41 1215 11.95 1250 12.49 1280 13.04 1315 13.58 1345 14.14 1375 14.69
600 1.07 670 1.31 735 1.55 795 1.80 850 2.06 905 2.32 955 2.60 1000 2.88
670 1.86 725 2.12 780 2.42 835 2.73 890 3.05 940 3.38 985 3.71 1030 4.04
785 3.66 830 3.98 875 4.29 920 4.61 960 4.96 1005 5.34 1045 5.74 1085 6.16
915 6.46 950 6.85 990 7.25 1025 7.64 1060 8.03 1095 8.42 1130 8.82 1165 9.23
1060 10.54 1085 10.97 1115 11.43 1145 11.90 1175 12.38 1210 12.86 1240 13.33 1270 13.79
1130 13.14 1155 13.59 1185 14.08 1210 14.57
605 1.22 670 1.47 735 1.74 790 2.01 850 2.28 900 2.56 950 2.85 995 3.14
645 1.77 705 2.02 760 2.30 815 2.61 870 2.93 920 3.25 965 3.58 1015 3.91
750 3.45 800 3.77 845 4.08 890 4.39 935 4.72 975 5.08 1020 5.47 1060 5.88
880 6.08 915 6.45 950 6.84 985 7.24 1025 7.63 1060 8.02 1095 8.41 1130 8.81
1020 9.95 1045 10.35 1075 10.77 1100 11.22 1130 11.69 1165 12.17 1195 12.65 1225 13.12
1130 13.81 1150 14.23 1175 14.68
660 1.61 720 1.87 780 2.17 835 2.46 885 2.76 935 3.06 985 3.37 1030 3.68
685 1.93 740 2.20 800 2.50 850 2.82 905 3.15 950 3.47 1000 3.80 1045 4.13
745 2.76 795 3.03 845 3.34 890 3.68 940 4.04 985 4.41 1030 4.79 1070 5.16
805 3.82 850 4.13 895 4.45 940 4.78 980 5.14 1025 5.54 1065 5.95 1105 6.37
940 6.75 980 7.15 1015 7.55 1050 7.94 1090 8.32 1125 8.72 1160 9.13 1195 9.57
1090 11.01 1120 11.47 1150 11.94 1180 12.42 1210 12.90 1240 13.36 1270 13.83 1300 14.29
1165 13.72 1190 14.20 1220 14.71

1. Refer to Accessory Pressure Loss table.
2. Values are based on the “Basic Packaged Unit” which includes pressure drop of the duct furnace(s) and “system effect” of the blower module.
3. Brake horsepower (BHP) includes drive losses.
4. Unit leaving air temperature is limited to 150 F (66 C) and is equal to: Entering Air Temperature + Duct Furnace(s) Temperature Rise.
5. “Total External Pressure” is the sum of the unit’s “Internal” accessory pressure loss(es) plus the external static pressure.
6. Ratings shown are for elevations between 0 and 2000 ft. (610 m). For unit installation in the U.S.A. above 2000 ft. (610 m), the unit input must be derated 4% for
each 1000 ft. (305 m) above sea level; refer to local codes, or in absence of local codes, refer to the National Fuel Gas Code, ANSI Standard Z223.1-1992
(N.F.P.A. No. 54), or the latest edition.
For installation in Canada, any references to deration at altitudes in excess of 2000 ft. (610 m) are to be ignored. At altitudes of 2000 to 4500 ft. (610 to 1372 m),
the unit must be derated to 90% of the normal rating, and be so marked in accordance with the C.G.A. certification.

32

Performance
Data
Table PD-6 — Rooftop Gas Heating Units Performance Data - Furnace Type (A,B) - Standard Temperature Rise - Rooftop Arrangement K,L
Capacity
Furnace TR
Type
(F)
61
49
10-A,B 37
29
25
55
15-A,B 44
37
59
20-A,B 49
37
25-A,B 59
46
60
30-A,B 55
37
35-A,B 57
43
40-A,B 59
49
50-A,B 119
92
120
60-A,B 111
74
70-A,B 115
86
80-A,B 118
98

CFM
1,200
1,500
2,000
2,500
3,000
2,000
2,500
3,000
2,500
3,000
4,000
3,100
4,000
3,700
4,000
6,000
4,500
6,000
5,000
6,000
3,100
4,000
3,700
4,000
6,000
4,500
6,000
5,000
6,000

Input Output
0.2
BTU/H BTU/H RPM BHP
100,000 80,000 575 .16
655 .26
795 .55
950 1.01
1110 1.68
150,000 120,000 685 .44
805 .78
935 1.28
200,000 160,000 425 .36
490 .59
630 1.30
250,000 200,000 495 .62
620 1.26
300,000 240,000 415 .47
430 .56
560 1.51
350,000 280,000 405 .58
500 1.22
400,000 320,000 430 .73
495 1.18
500,000 400,000 515 .66
640 1.34
600,000 480,000 455 .55
480 .66
640 1.83
700,000 560,000 445 .67
545 1.39
800,000 640,000 460 .82
525 1.31

0.4
RPM BHP
705 .23
765 .35
890 .65
1030 1.12
1175 1.82
785 .54
890 .91
1005 1.44
495 .46
540 .68
660 1.41
540 .72
650 1.37
505 .65
520 .76
630 1.79
490 .76
555 1.43
500 .92
545 1.38
565 .76
675 1.45
545 .74
560 .86
700 2.12
525 .85
610 1.63
535 1.01
585 1.54

TOTAL EXTERNAL STATIC PRESSURE (INCHES OF WATER)
0.6
0.8
1
1.2
1.4
1.6
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
825 .31 940 .40 1040 .50 1135 .60 1220 .70 1300 .80
870 .44 965 .54 1060 .64 1150 .75 1235 .87 1315 .99
975 .77 1055 .88 1130 1.00 1205 1.12 1280 1.25 1355 1.39
1105 1.25 1175 1.39 1240 1.54 1305 1.68 1365 1.83 1425 1.98
1240 1.95 1305 2.10 1365 2.27 1420 2.44 1475 2.62 1530 2.79
880 .63 965 .75 1045 .87 1120 .98 1195 1.11 1270 1.24
970 1.04 1045 1.15 1120 1.28 1190 1.43 1255 1.57 1320 1.72
1075 1.60 1140 1.75 1205 1.88 1270 2.02 1335 2.18 1390 2.35
565 .55 635 .67 700 .80 760 .93 820 1.07 875 1.21
600 .80 660 .92 720 1.05 775 1.19 830 1.35 885 1.51
700 1.54 740 1.68 785 1.84 830 2.00 875 2.16 920 2.32
595 .83 655 .95 715 1.08 770 1.22 820 1.37 875 1.54
685 1.49 725 1.63 770 1.79 815 1.95 860 2.10 905 2.26
590 .86 665 1.08 740 1.33 815 1.60 885 1.89 950 2.19
600 .97 675 1.20 745 1.45 815 1.72 880 2.02 945 2.33
690 2.08 750 2.38 805 2.69 860 3.01 910 3.34 960 3.68
565 .96 640 1.19 705 1.43 765 1.68 825 1.93 880 2.19
615 1.66 675 1.90 735 2.16 790 2.46 845 2.78 895 3.10
570 1.12 640 1.35 705 1.61 765 1.88 820 2.15 875 2.43
605 1.62 665 1.85 725 2.11 780 2.40 835 2.72 885 3.04
625 .89 680 1.01 740 1.14 790 1.29 845 1.45 895 1.61
715 1.59 755 1.74 805 1.90 850 2.06 895 2.21 935 2.38
625 .95 700 1.19 775 1.45 845 1.73 915 2.02 975 2.33
640 1.09 710 1.33 780 1.59 850 1.87 915 2.18 975 2.50
755 2.42 810 2.73 865 3.05 915 3.38 965 3.72 1015 4.08
600 1.07 670 1.31 735 1.55 795 1.80 850 2.06 905 2.32
670 1.86 725 2.12 780 2.42 835 2.73 890 3.05 940 3.38
605 1.22 670 1.47 735 1.74 790 2.01 850 2.28 900 2.56
645 1.77 705 2.02 760 2.30 815 2.61 870 2.93 920 3.25

1.8
RPM BHP
1375 .91
1390 1.12
1425 1.54
1485 2.13
1580 2.97
1345 1.37
1380 1.86
1450 2.53
925 1.35
930 1.67
965 2.49
925 1.71
950 2.43
1010 2.51
1005 2.65
1010 4.03
930 2.46
945 3.43
925 2.71
935 3.36
945 1.78
980 2.56
1035 2.65
1035 2.83
1065 4.45
955 2.60
985 3.71
950 2.85
965 3.58

2
RPM BHP
1440 1.02
1460 1.24
1490 1.68
1545 2.29
1635 3.14
1415 1.52
1440 2.01
1500 2.70
975 1.50
980 1.84
1005 2.68
970 1.87
990 2.61
1065 2.82
1065 2.99
1055 4.40
975 2.74
990 3.75
975 3.00
985 3.69
990 1.95
1020 2.76
1090 2.97
1090 3.16
1110 4.83
1000 2.88
1030 4.04
995 3.14
1015 3.91

Table PD-7 — Rooftop Gas Heating Units Performance Data - Furnace Type C,D - High Temperature Rise - Rooftop Arrangement K,L

Capacity
TOTAL EXTERNAL STATIC PRESSURE (INCHES OF WATER)
Furnace TR
Input Output
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Type
(F)
CFM
BTU/H BTU/H RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
91
1,600 200,000 158,000 380 .16 480 .24 565 .33 645 .42 710 .52 770 .63 830 .74 880 .86 930 .98 980 1.10
81
1,800
400 .20 495 .29 580 .39 650 .49 720 .59 780 .70 835 .82 890 .94 940 1.07 985 1.20
20-C,D 73
2,000
425 .26 510 .35 590 .45 665 .56 730 .67 790 .79 845 .91 900 1.04 950 1.17 995 1.31
66
2,200
450 .33 530 .42 605 .53 675 .64 740 .76 800 .89 855 1.02 905 1.15 955 1.28 1000 1.43
61
2,400
475 .40 550 .50 620 .61 690 .74 750 .87 810 1.00 865 1.13 915 1.27 965 1.41 1010 1.56
91
2,000 250,000 197,500 405 .24 495 .33 575 .43 650 .54 715 .65 780 .76 835 .89 890 1.01 940 1.14 985 1.28
81
2,250
435 .32 515 .41 590 .52 660 .64 725 .76 785 .88 845 1.01 895 1.14 945 1.28 995 1.42
25-C,D 73
2,500
465 .42 540 .52 610 .62 675 .75 740 .88 795 1.02 855 1.15 905 1.29 955 1.44 1000 1.58
66
2,750
500 .53 565 .64 630 .75 695 .87 755 1.02 810 1.16 865 1.31 915 1.46 965 1.62 1010 1.77
61
3,000
535 .67 595 .79 655 .90 710 1.03 770 1.17 825 1.33 875 1.49 925 1.65 975 1.81 1020 1.98
91
2,400 300,000 237,000 390 .25 510 .40 615 .60 700 .80 775 1.01 845 1.23 905 1.45 960 1.68 1010 1.92 1055 2.16
84
2,600
405 .29 515 .45 615 .65 705 .86 780 1.09 850 1.31 910 1.55 965 1.79 1020 2.04 1065 2.29
78
2,800
420 .33 520 .50 620 .70 710 .92 785 1.16 855 1.40 920 1.65 975 1.91 1025 2.16 1075 2.43
30-C,D 73
3,000
435 .38 530 .56 625 .76 710 .99 790 1.24 860 1.49 925 1.76 980 2.02 1035 2.29 1085 2.57
68
3,200
450 .44 540 .62 630 .83 715 1.06 790 1.32 865 1.59 930 1.86 985 2.14 1040 2.42 1090 2.71
64
3,400
465 .51 555 .69 640 .91 720 1.14 795 1.40 865 1.68 930 1.97 990 2.26 1045 2.56 1100 2.86
61
3,600
480 .58 565 .77 645 .99 725 1.23 800 1.49 870 1.78 935 2.08 995 2.38 1050 2.69 1105 3.00
85
3,000 350,000 276,500 385 .29 485 .46 575 .62 650 .81 715 1.00 775 1.21 835 1.44 885 1.67 935 1.90 980 2.15
80
3,200
395 .34 495 .50 580 .68 655 .87 720 1.07 780 1.29 840 1.51 890 1.75 940 2.00 985 2.25
35-C,D 75
3,400
410 .38 505 .56 585 .74 660 .94 725 1.14 785 1.36 840 1.60 895 1.84 945 2.09 990 2.35
67
3,800
430 .49 520 .68 600 .88 670 1.09 735 1.31 795 1.54 855 1.78 905 2.03 955 2.29 1000 2.57
64
4,000
445 .55 530 .74 610 .96 680 1.17 745 1.40 805 1.63 860 1.88 910 2.14 960 2.41 1005 2.68
61
4,200
460 .62 540 .81 615 1.04 685 1.26 750 1.50 810 1.74 865 1.99 915 2.25 965 2.52 1010 2.81
88
3,300 400,000 316,000 390 .34 485 .51 575 .69 650 .88 715 1.08 775 1.30 835 1.52 885 1.76 935 2.01 985 2.27
83
3,500
400 .38 495 .56 580 .75 655 .94 720 1.15 780 1.37 835 1.60 890 1.85 940 2.10 985 2.37
40-C,D 73
4,000
430 .52 515 .70 595 .92 665 1.13 730 1.36 790 1.59 850 1.83 900 2.09 950 2.35 995 2.63
65
4,500
460 .70 540 .88 615 1.11 680 1.35 745 1.60 805 1.85 860 2.10 910 2.37 960 2.65 1005 2.93
58
5,000
495 .91 565 1.11 635 1.34 700 1.60 760 1.87 820 2.14 875 2.41 925 2.70 975 2.99 1020 3.29
Notes:
1. Refer to Accessory Pressure Loss table.
2. Values are based on the “Basic Packaged Unit” which includes pressure drop of the duct furnace(s) and “system effect” of the blower module.
3. Brake horsepower (BHP) includes drive losses.
4. Unit leaving air temperature is limited to 150 F (66 C) and is equal to: Entering Air Temperature + Duct Furnace(s) Temperature Rise.
5. “Total External Pressure” is the sum of the unit’s “Internal” accessory pressure loss(es) plus the external static pressure.
6. Ratings shown are for elevations between 0 and 2000 ft. (610 m). For unit installation in the U.S.A. above 2000 ft. (610 m), the unit input must be derated 4%
for each 1000 ft. (305 m) above sea level; refer to local codes, or in absence of local codes, refer to the National Fuel Gas Code, ANSI Standard Z223.1-1992
(N.F.P.A. No. 54), or the latest edition.
For installation in Canada, any references to deration at altitudes in excess of 2000 ft. (610 m) are to be ignored. At altitudes of 2000 to 4500 ft. (610 to 1372 m),
the unit must be derated to 90% of the normal rating, and be so marked in accordance with the C.G.A. certification.

33

Performance
Data
Table PD-8 — Rooftop Gas Heating Units Accessory Pressure Loss Data — Rooftop Arrangement G,J,K,L

Pressure Loss (Inches of Water)
Rainhood
Filters
Supply
Return or Outside
With
Throwaway
Washable
Pleated
Air
Air
Capacity
CFM
Screen
Mstr.Elim.
2”
1”
2”
1”
2”
Plenum
Damper
   800
<.01  
.01
.01
<.01  
<.01  
<.01  
<.01  
.02
.01
   900
.01
.02
.01
<.01  
<.01  
<.01  
<.01  
.02
.02
 1,100
.02
.02
.02
<.01  
<.01  
.01
<.01  
.03
.03
10*
 1,200
.02
.03
.02
<.01  
<.01  
.02
<.01  
.04
.03
 1,500
.03
.04
.02
<.01  
<.01  
.02
.01
.06
.05
 2,000
.06
.07
.04
<.01  
<.01  
.04
.02
.10
.09
 2,500
.09
.12
.05
<.01  
.01
.05
.03
.15
.13
 3,000
.13
.17
.06
.01
.02
.07
.04
.22
.19
 3,500
.18
.23
.08
.01
.02
.09
.05
.29
.25
 1,200
.02
.03
.02
<.01  
<.01  
.02
<.01  
.03
.03
 1,400
.03
.04
.02
<.01  
<.01  
.02
<.01  
.03
.04
 1,600
.04
.05
.03
<.01  
<.01  
.03
.01
.04
.06
 1,800
.05
.06
.03
<.01  
<.01  
.03
.02
.06
.07
15*
 2,000
.06
.07
.04
<.01  
<.01  
.04
.02
.07
.09
 2,500
.09
.12
.05
<.01  
.01
.05
.03
.11
.13
 3,000
.13
.17
.06
.01
.02
.07
.04
.15
.19
 3,500
.18
.23
.08
.01
.02
.09
.05
.21
.25
 4,000
.23
.30
.09
.02
.03
.12
.07
.27
.33
 4,500
.29
.38
.11
.02
.03
.14
.08
.34
.42
 1,600
.02
.02
.03
<.01  
<.01  
.03
.01
.02
.03
 1,800
.02
.03
.03
<.01  
<.01  
.03
.02
.03
.03
 2,000
.02
.03
.04
<.01  
<.01  
.04
.02
.03
.04
 2,200
.03
.04
.04
<.01  
<.01  
.04
.02
.04
.05
 2,400
.03
.05
.05
<.01  
<.01  
.05
.03
.05
.05
 2,500
.04
.05
.05
<.01  
.01
.05
.03
.05
.06
20
 3,000
.05
.07
.06
.01
.02
.07
.04
.07
.08
 4,000
.09
.13
.09
.02
.03
.12
.07
.13
.15
 5,000
.15
.20
.12
.03
.04
.17
.10
.21
.23
 6,000
.21
.29
.16
.04
.06
.23
.14
.30
.33
 6,500
.25
.34
.17
.05
.07
.26
.16
.35
.39
 7,000
.29
.40
.19
.06
.08
.30
.18
.40
.45
 7,400
.32
.45
.06
.09
.33
.20
.45
.50
 2,000
.02
.03
.04
<.01  
<.01  
.04
.02
.02
.04
 2,250
.03
.04
.04
<.01  
<.01  
.04
.02
.03
.05
 2,500
.04
.05
.05
<.01  
.01
.05
.03
.04
.06
 2,750
.04
.06
.05
<.01  
.01
.06
.03
.04
.07
25
 3,000
.05
.07
.06
.01
.02
.07
.04
.05
.08
 4,000
.09
.13
.09
.02
.03
.12
.07
.09
.15
 5,000
.15
.20
.12
.03
.04
.17
.10
.14
.23
 6,000
.21
.29
.16
.04
.06
.23
.14
.21
.33
 7,000
.29
.40
.19
.06
.08
.30
.18
.28
.45
 7,500
.33
.46
.07
.09
.34
.21
.32
.52
 2,400
.02
.03
.02
<.01  
<.01  
.02
.01
.02
.03
 2,600
.02
.03
.03
<.01  
<.01  
.03
.01
.03
.04
 2,800
.03
.04
.03
<.01  
<.01  
.03
.01
.03
.04
 3,000
.03
.04
.03
<.01  
<.01  
.03
.02
.03
.05
 3,200
.03
.05
.03
<.01  
<.01  
.04
.02
.04
.05
30
 3,400
.04
.06
.04
<.01  
<.01  
.04
.02
.04
.06
 3,600
.04
.06
.04
<.01  
<.01  
.04
.02
.05
.07
 4,000
.05
.08
.05
<.01  
.01
.05
.03
.06
.08
 6,000
.12
.17
.08
.02
.02
.10
.06
.13
.19
 8,000
.22
.31
.12
.03
.04
.17
.10
.24
.33
10,000
.34
.48
.16
.04
.06
.24
.14
.37
.52
11,000
.41
.58
.18
.05
.08
.28
.17
.45
.63
 3,000
.03
.04
.03
<.01  
<.01  
.03
.02
.03
.05
 3,200
.03
.05
.03
<.01  
<.01  
.04
.02
.03
.05
 3,400
.04
.06
.04
<.01  
<.01  
.04
.02
.04
.06
 3,600
.04
.06
.04
<.01  
<.01  
.04
.02
.04
.07
 3,800
.05
.07
.04
<.01  
<.01  
.05
.03
.04
.08
35
 4,000
.05
.08
.05
<.01  
.01
.05
.03
.05
.08
 4,500
.07
.10
.05
<.01  
.01
.06
.03
.06
.11
 6,000
.12
.17
.08
.02
.02
.10
.06
.11
.19
 8,000
.22
.31
.12
.03
.04
.17
.10
.19
.33
10,000
.34
.48
.16
.04
.06
.24
.14
.30
.52
12,000
.49
.69
.06
.09
.33
.20
.43
.75
13,000
.58
.81
.07
.11
.38
.23
.51
.88
*Available in arrangements K and L only.
Refer to Table for Cooling Coil and Chilled Water Coil Pressure Losses (Arrangement K, L). Include the coil pressure loss with the above data.

34

Performance
Data
Table PD-8 (Continued) — Rooftop Gas Heating Units Accessory Pressure Loss Data — Rooftop Arrangement G,J,K,L

Capacity

40

50

60

70

80

12

CFM
 3,300
 3,500
 4,000
 4,500
 5,000
 6,000
 8,000
10,000
12,000
14,000
 3,100
 4,000
 5,000
 6,000
 7,000
 7,500
 3,700
 4,000
 6,000
 8,000
10,000
11,000
 4,500
 6,000
 8,000
10,000
12,000
13,000
 5,000
 6,000
 8,000
10,000
12,000
13,500
 7,400
 8,000
10,000
12,000
13,000

Rainhood
With
Screen
Mstr.Elim.
.03
.04
.03
.05
.04
.06
.05
.08
.07
.10
.10
.14
.17
.24
.27
.38
.39
.55
.53
.75
.06
.08
.09
.13
.15
.20
.21
.29
.29
.40
.33
.46
.05
.07
.05
.08
.12
.17
.22
.31
.34
.48
.41
.58
.07
.10
.12
.17
.22
.31
.34
.48
.49
.69
.58
.81
.07
.10
.10
.14
.17
.24
.27
.38
.39
.55
.49
.70
.15
.21
.17
.24
.27
.38
.39
.55
.46
.65

Throwaway
2”
.03
.03
.04
.05
.05
.07
.10
.13
.17
.07
.06
.09
.12
.16
.19
.04
.05
.08
.12
.16
.18
.05
.08
.12
.16
.05
.07
.10
.13
.17
.09
.10
.13
.17
.19

Pressure Loss (Inches of Water)
Filters
Washable
Pleated
1”
2”
1”
<.01  
<.01  
.03
<.01  
<.01  
.03
<.01  
<.01  
.04
<.01  
<.01  
.05
<.01  
.01
.06
.01
.02
.08
.02
.03
.13
.03
.05
.19
.05
.07
.26
.09
.33
.21
.01
.02
.08
.02
.03
.12
.03
.04
.17
.04
.06
.23
.06
.08
.30
.07
.09
.34
<.01  
<.01  
.05
<.01  
.01
.05
.02
.02
.10
.03
.04
.17
.04
.06
.24
.05
.08
.28
<.01  
.01
.06
.02
.02
.10
.03
.04
.17
.04
.06
.24
.06
.09
.33
.07
.11
.38
<.01  
.01
.06
.01
.02
.08
.02
.03
.13
.03
.05
.19
.05
.07
.26
.06
.09
.31
.02
.03
.11
.02
.03
.13
.03
.05
.19
.05
.07
.26
.06
.08
.30

2”
.02
.02
.02
.03
.03
.04
.07
.11
.16
.46
.04
.07
.10
.14
.18
.21
.02
.03
.06
.10
.14
.17
.03
.06
.10
.14
.20
.23
.03
.04
.07
.11
.16
.19
.06
.07
.11
.16
.18

Supply
Air
Plenum
.03
.03
.04
.05
.06
.08
.15
.23
.34
.80
.06
.09
.14
.21
.28
.32
.05
.06
.13
.24
.37
.45
.06
.11
.19
.30
.43
.51
.06
.08
.15
.23
.34
.43
.13
.15
.23
.34
.40

Return or Outside
Air
Damper
.05
.05
.07
.08
.10
.15
.26
.41
.59
.09
.15
.23
.33
.45
.52
.07
.08
.19
.33
.52
.63
.11
.19
.33
.52
.75
.88
.10
.15
.26
.41
.59
.75
.22
.26
.41
.59
.69

Note: Refer to Table for Cooling Coil and Chilled Water Coil Pressure Losses. (Rooftop Arrangements K,L). Include the coil pressure loss with the above data.

35

Performance
Data
Table PD-9 — DX Cooling Coil Performance Data (Ref. R-22) — Rooftop Arrangements K, L

Unit
Capacity
10,15

20,25,50

30,35,60,
70

40,80

Air
Flow
(SCFM)
1200

Face
Velocity
(FPM)
240

1500

301

2000

401

2500

501

3000

601

1600

217

2000

271

3000

407

4000

542

4400

596

2400

246

3000

307

4000

410

5000

512

5700

584

3300

304

4000

369

5000

461

6000

553

6300

581

Conversions:
2119 SCFM = 1 m/s
196.8 FPM = 1 m/s
3.412 MBH = 1 kW
(F-32) 5/9 = C
1 In. W.C. = 248.8 Pa
1 LB. = 0.453 kg

Fin
Spacing
(FPF)
*96
*120
144
96
*120
144
96
120
144
96
120
144
96
120
144
*96
*120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144

Capacity based on 95 F EDB, 74 F EWB, 45 F Sat. Suction, 100 F Liquid
Number of Rows
4
6
Capacity
L.A.T.
A.P.D.
WT.
Capacity
L.A.T.
A.P.D.
(MBH)
(DB/WB) In. W.C.
(LBS)
(MBH)
(DB/WB)
In. W.C.
62
65
77.0
55 / 55
0.16
70
87.1
52 / 52
0.23
75.5
62 / 60
0.20
62
83.8
59 / 58
0.22
65
97.8
55 / 55
0.32
90.3
57 / 56
0.23
70
103.8
53 / 53
0.35
89.5
64 / 62
0.33
62
110.2
59 / 58
0.49
100.3
61 / 60
0.35
65
121.6
57 / 56
0.52
109.0
59 / 58
0.37
70
130.6
55 / 55
0.55
100.8
66 / 63
0.46
62
127.7
61 / 60
0.68
113.7
63 / 61
0.49
65
142.5
58 / 58
0.73
124.5
61 / 60
0.52
70
154.5
56 / 56
0.78
110.2
68 / 64
0.59
62
142.9
62 / 61
0.88
124.9
65 / 63
0.64
65
161.1
59 / 59
0.94
139.2
62 / 61
0.66
70
176.0
57 / 57
1.01
91.1
59 / 58
0.11
84
99.5
56 / 56
0.12
89
106.4
54 / 54
0.13
95
120.8
51 / 51
0.20
105.3
61 / 59
0.17
84
129.3
55 / 55
0.25
117.2
58 / 57
0.18
89
138.7
53 / 53
0.27
126.6
56 / 55
0.20
95
145.3
52 / 52
0.29
136.1
64 / 61
0.33
84
171.4
58 / 57
0.50
154.4
61 / 59
0.36
89
186.6
56 / 56
0.54
169.8
58 / 58
0.38
95
198.1
54 / 54
0.57
160.0
66 / 63
0.51
84
204.4
61 / 60
0.77
184.1
63 / 61
0.55
89
224.8
58 / 58
0.82
205.2
61 / 59
0.59
95
243.3
56 / 56
0.87
168.6
67 / 64
0.58
84
215.7
62 / 60
0.87
194.5
64 / 62
0.63
89
238.1
59 / 59
0.94
217.7
61 / 60
0.67
95
261.2
57 / 57
1.00
134.9
59 / 58
0.14
105
159.5
55 / 54
0.21
148.7
57 / 56
0.15
112
169.1
53 / 53
0.23
159.0
55 / 54
0.17
119
176.9
51 / 51
0.24
156.2
61 / 59
0.21
105
186.3
56 / 56
0.32
173.6
58 / 57
0.23
112
201.5
54 / 54
0.34
187.2
56 / 56
0.24
119
213.6
52 / 52
0.36
185.7
64 / 61
0.34
105
228.1
58 / 58
0.51
208.6
61 / 59
0.36
112
251.1
56 / 55
0.54
227.3
58 / 58
0.39
119
269.5
54 / 54
0.58
209.8
66 / 62
0.47
105
264.7
60 / 59
0.71
237.6
63 / 61
0.51
112
294.9
57 / 57
0.76
260.7
60 / 59
0.55
119
319.7
55 / 55
0.81
224.3
67 / 63
0.57
105
287.5
61 / 60
0.85
255.0
64 / 62
0.61
112
322.7
58 / 58
0.91
281.8
61 / 60
0.65
119
352.0
56 / 56
0.97
173.1
61 / 59
0.21
115
207.5
56 / 55
0.31
191.6
58 / 57
0.22
122
224.7
54 / 54
0.33
205.9
56 / 56
0.24
130
237.6
52 / 52
0.36
194.3
63 / 60
0.29
115
238.6
57 / 57
0.43
216.5
60 / 58
0.31
122
260.6
55 / 55
0.46
234.1
58 / 57
0.33
130
277.7
53 / 53
0.49
219.9
65 / 62
0.40
115
277.9
59 / 58
0.60
246.8
62 / 60
0.43
122
306.9
56 / 56
0.65
271.9
59 / 58
0.46
130
330.3
54 / 54
0.69
241.3
66 / 63
0.53
115
312.4
60 / 59
0.79
273.5
63 / 61
0.56
122
348.2
58 / 57
0.85
307.7
61 / 59
0.60
130
377.9
56 / 55
0.91
247.1
67 / 63
0.56
115
321.9
61 / 60
0.84
281.7
64 / 62
0.60
122
359.7
58 / 57
0.91
317.7
61 / 60
0.64
130
391.3
56 / 56
0.97

WT.
(LBS)
84
89
95
84
89
95
84
89
95
84
89
95
84
89
95
115
122
130
115
122
130
115
122
130
115
122
130
115
122
130
145
155
166
145
155
166
145
155
166
145
155
166
145
155
166
158
170
182
158
170
182
158
170
182
158
170
182
158
170
182

Notes:
1.) Data certified in accordance with ARI Standard 410.
2.) Capacity based on 95 F EDB, 74 F EWB, 45 F Sat. Suction, 100 F Liquid.
3.) Weight listed is the total weight of the dry coil.
4.) Coils denoted by an asterisk ( * ) require special pricing; consult product marketing for special coil requirements and pricing.

36

Performance
Data
Table PD-10 — DX Cooling Coil Performance Data (Ref. R-22) — Rooftop Arrangements K, L

Unit
Capacity
10,15

20,25,50

30,35,60,
70

40,80

Air
Flow
(SCFM)
1200

Face
Velocity
(FPM)
240

1500

301

2000

401

2500

501

3000

601

1600

217

2000

271

3000

407

4000

542

4400

596

2400

246

3000

307

4000

410

5000

512

5700

584

3300

304

4000

369

5000

461

6000

553

6300

581

Conversions:
2119 SCFM = 1 m/s
196.8 FPM = 1 m/s
3.412 MBH = 1 kW
(F-32) 5/9 = C
1 In. W.C. = 248.8 Pa
1 LB. = 0.453 kg

Fin
Spacing
(FPF)
*96
*120
*144
*96
*120
*144
96
120
144
96
120
144
96
120
144
*96
*120
*144
*96
*120
144
96
120
144
96
120
144
96
120
144
*96
*120
144
*96
*120
144
96
120
144
96
120
144
96
120
144
*96
*120
144
96
120
144
96
120
144
96
120
144
96
120
144

Capacity based on 80 F EDB, 67 F EWB, 45 F Sat. Suction, 100 F Liquid
Number of Rows
4
6
Capacity
L.A.T.
A.P.D.
WT.
Capacity
L.A.T.
A.P.D.
(MBH)
(DB/WB) In. W.C.
(LBS)
(MBH)
(DB/WB)
In. W.C.
62
65
70
62
65
58.6
55 / 54
0.23
70
57.4
60 / 58
0.33
62
68.7
57 / 56
0.48
64.9
58 / 57
0.35
65
80.4
54 / 54
0.52
71.3
56 / 56
0.37
70
84.8
53 / 53
0.55
64.9
61 / 59
0.46
62
79.5
58 / 57
0.67
74.1
59 / 58
0.49
65
89.9
56 / 56
0.71
82.0
57 / 57
0.52
70
97.4
55 / 54
0.76
71.3
62 / 60
0.59
62
89.8
59 / 58
0.87
82.0
60 / 59
0.63
65
101.2
57 / 56
0.93
91.3
58 / 57
0.67
70
111.1
55 / 55
1.00
84
89
95
79.8
50 / 50
0.19
84
89
82.2
54 / 54
0.20
95
97.7
51 / 51
0.29
88.2
59 / 58
0.33
84
112.0
56 / 55
0.50
97.7
58 / 57
0.36
89
123.1
54 / 54
0.53
107.5
56 / 56
0.38
95
131.8
53 / 53
0.57
101.3
61 / 59
0.51
84
134.3
57 / 56
0.77
116.3
59 / 58
0.54
89
149.4
55 / 55
0.82
130.5
57 / 57
0.58
95
161.7
54 / 54
0.87
105.6
62 / 60
0.58
84
142.1
58 / 57
0.87
123.1
60 / 58
0.62
89
158.7
56 / 55
0.94
138.6
58 / 57
0.66
95
172.3
55 / 54
1.00
105
112
103.8
53 / 53
0.16
119
119.4
50 / 50
0.25
100.9
58 / 56
0.21
105
112.9
56 / 55
0.23
112
122.5
54 / 54
0.24
119
141.9
51 / 51
0.36
120.4
59 / 58
0.34
105
151.4
55 / 55
0.51
136.3
57 / 56
0.36
112
164.4
54 / 54
0.54
149.7
56 / 55
0.39
119
174.3
53 / 53
0.58
136.6
60 / 59
0.47
105
172.9
57 / 56
0.71
155.9
58 / 57
0.51
112
188.8
55 / 55
0.76
172.9
57 / 56
0.54
119
204.6
54 / 54
0.80
146.4
61 / 59
0.57
105
185.7
58 / 57
0.85
168.0
59 / 58
0.61
112
205.5
56 / 55
0.90
187.2
57 / 57
0.65
119
225.4
54 / 54
0.96
113.2
57 / 56
0.21
115
126.2
55 / 55
0.22
122
136.5
54 / 54
0.24
130
155.2
51 / 51
0.36
127.4
58 / 57
0.29
115
156.7
55 / 54
0.43
143.1
56 / 56
0.31
122
168.7
53 / 53
0.46
155.9
55 / 54
0.33
130
179.8
52 / 52
0.48
144.9
60 / 58
0.40
115
179.0
56 / 56
0.60
164.1
58 / 57
0.43
122
197.6
55 / 54
0.64
180.2
56 / 55
0.46
130
213.9
53 / 53
0.68
159.7
61 / 59
0.53
115
199.4
57 / 56
0.79
182.0
59 / 58
0.57
122
224.5
55 / 55
0.84
201.1
57 / 56
0.61
130
245.1
54 / 54
0.90
163.8
61 / 59
0.56
115
205.6
58 / 57
0.84
186.9
59 / 58
0.61
122
232.1
56 / 55
0.90
206.9
57 / 57
0.65
130
253.9
54 / 54
0.96

WT.
(LBS)
84
89
95
84
89
95
84
89
95
84
89
95
84
89
95
115
122
130
115
122
130
115
122
130
115
122
130
115
122
130
145
155
166
145
155
166
145
155
166
145
155
166
145
155
166
158
170
182
158
170
182
158
170
182
158
170
182
158
170
182

Notes:
1.) Data certified in accordance with ARI Standard 410.
2.) Capacity based on 80 F EDB, 67 F EWB, 45 F Sat. Suction, 100 F Liquid.
3.) Weight listed is the total weight of the dry coil.
4.) Coils denoted by an asterisk ( * ) require special pricing; consult product marketing for special coil requirements and pricing.

37

Performance
Data
Table PD-11 — Standard Conditions and Specifications — Refrigerant DX Coil
CONDITIONS
Elevation
Entering Air Temperature DB:
Entering Air Temperature WB:
Suction Temperature:
Liquid Temperature:
Fouling Factor:
SPECIFICATIONS
Coil Type:
Tube Size:
Row Sizes:
Fin Type:
Fin Size:
Fin Spacing:
Circuiting:

Turbulators:
DIMENSIONAL DATA LISTING
Unit Size
10, 15
20, 25, 50
30, 35, 60, 70
40, 80

0 Ft.
80 F
95
67 F
74
45 F
45
100 F
100
2
 0 HR x FT x F/BTU
FD — Staggered Tube Pattern
1
/2” O.D. x 0.016” TWT Copper
4,6
DE
Optional DH
0.0055” Aluminum
Standard — 96, 120, 144 Fins/Ft.
Optional — 72 thru 180 Fins/Ft.
Standard — Single
Optional — Dual:
a) Intertwined
b) Face-Split
No
Finned Width
30.00
30.00
30.00
30.00

Fixed Finned Length
23.00
34.00
45.00
50.00

Note:
1. Above specification is for standard coil with standard fin spacing. Specify fin spacing and dual
circuiting.
2. Special coils — contact Product Marketing.
3. Every order requires a coil selection.

38

Performance
Data
Table PD-12 — Chilled Water Coil Performance Data — Rooftop Arrangements K, L

Unit
Capacity
10,15

20,25,50

30,35,60,
70

40,80

Air
Flow
(SCFM)
960

Face
Velocity
(FPM)
200

1600

334

2900

605

1800

254

3000

424

4300

607

1900

203

3200

341

4500

480

5700

608

2100

202

3500

336

4900

470

6300

605

Fin
Spacing
(FPF)
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144

Capacity
(MBH)
63.4
68.4
72.1
89.0
97.3
103.8
120.6
134.4
145.0
109.8
119.0
126.3
148.1
163.0
174.9
175.1
195.3
210.8
123.5
133.2
140.5
172.1
188.1
200.8
205.0
226.7
243.8
227.8
253.7
273.7
136.2
146.9
155.0
188.4
205.7
219.6
223.8
247.4
265.9
250.4
278.8
300.7

Capacity based on 95 F EDB, 74 F EWB, 45 EWT, 70 GPM
Number of Rows
4
6
L.A.T.
A.P.D.
WT.
Capacity
L.A.T.
(DB/WB) In. W.C.
(LBS)
(MBH)
(DB/WB)
56 / 54
0.08
62
74.1
50 / 50
53 / 52
0.09
65
77.7
49 / 49
51 / 51
0.11
70
80.0
48 / 47
60 / 58
0.18
62
109.1
54 / 53
58 / 56
0.22
65
116.4
52 / 52
55 / 55
0.24
70
121.8
51 / 50
66 / 63
0.47
62
156.0
60 / 59
64 / 61
0.52
65
170.7
58 / 57
61 / 60
0.60
70
181.6
56 / 56
58 / 56
0.12
84
131.2
52 / 52
55 / 54
0.14
89
138.6
50 / 50
53 / 53
0.16
95
143.9
49 / 49
63 / 60
0.27
84
185.5
57 / 56
60 / 58
0.31
89
199.9
55 / 54
58 / 57
0.35
95
210.8
53 / 53
67 / 63
0.47
84
226.1
61 / 59
64 / 61
0.52
89
247.5
58 / 57
62 / 60
0.60
95
263.2
56 / 56
56 / 55
0.08
105
144.6
51 / 50
54 / 53
0.09
112
151.8
49 / 49
52 / 51
0.11
119
156.7
48 / 48
61 / 59
0.19
105
211.2
55 / 54
58 / 57
0.22
112
225.7
53 / 53
56 / 55
0.25
119
236.7
51 / 51
65 / 61
0.33
105
258.8
59 / 57
62 / 60
0.37
112
281.0
56 / 56
60 / 58
0.42
119
297.4
55 / 54
67 / 63
0.46
105
292.9
61 / 59
64 / 62
0.52
112
320.4
59 / 58
62 / 61
0.59
119
340.8
57 / 57
56 / 55
0.08
115
159.5
51 / 51
54 / 53
0.09
122
167.5
49 / 49
52 / 51
0.11
130
172.9
48 / 48
61 / 59
0.19
115
230.8
55 / 54
58 / 57
0.22
122
246.5
53 / 53
56 / 55
0.25
130
258.6
51 / 51
64 / 61
0.32
115
281.9
59 / 57
62 / 60
0.36
122
305.8
56 / 56
60 / 58
0.41
130
323.6
55 / 54
67 / 63
0.46
115
321.3
61 / 60
64 / 62
0.51
122
351.4
59 / 58
62 / 61
0.59
130
373.6
57 / 57

Conversions:
2119 SCFM = 1 m/s
196.8 FPM = 1 m/s
3.412 MBH = 1 kW
(F-32) 5/9 = C
1 In. W.C. = 248.8 Pa
1 LB. = 0.453 kg
Notes:
1.) Data certified in accordance with ARI Standard 410.
2.) Capacity based on 95 F EDB, 74 F EWB, 45 F EWT, 70 GPM.
3.) Weight listed is the total weight of the dry coil.
4.) Contact product marketing for special coil requirements.

39

A.P.D.
In. W.C.
0.12
0.14
0.16
0.28
0.32
0.37
0.70
0.78
0.90
0.18
0.21
0.24
0.40
0.46
0.52
0.70
0.78
0.90
0.12
0.14
0.17
0.29
0.34
0.38
0.49
0.55
0.63
0.69
0.78
0.89
0.12
0.14
0.16
0.28
0.33
0.37
0.47
0.54
0.61
0.68
0.77
0.89

WT.
(LBS)
84
89
95
84
89
95
84
89
95
115
122
130
115
122
130
115
122
130
145
155
166
145
155
166
145
155
166
145
155
166
158
170
182
158
170
182
158
170
182
158
170
182

Performance
Data
Table PD-13 — Chilled Water Coil Performance Data — Rooftop Arrangements K, L

Unit
Capacity
10,15

20,25,50

30,35,60,
70

40,80

Air
Flow
(SCFM)
960

Face
Velocity
(FPM)
200

1600

334

2900

605

1800

254

3000

424

4300

607

1900

203

3200

341

4500

480

5700

608

2100

202

3500

336

4900

470

6300

605

Fin
Spacing
(FPF)
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144
96
120
144

Capacity
(MBH)
44.6
48.1
50.6
62.8
68.7
73.3
85.6
95.3
102.7
77.4
83.9
89.0
104.9
115.5
123.7
124.5
138.4
149.2
86.9
93.7
98.8
121.7
133.0
141.9
145.5
160.6
172.5
161.7
179.8
193.8
95.9
103.4
109.0
133.3
145.5
155.2
158.9
175.2
188.1
177.7
197.5
212.8

Capacity based on 80 F EDB, 67 F EWB, 45 EWT, 70 GPM
Number of Rows
4
6
L.A.T.
A.P.D.
WT.
Capacity
L.A.T.
(DB/WB) In. W.C.
(LBS)
(MBH)
(DB/WB)
53 / 52
0.08
62
52.0
49 / 49
51 / 50
0.09
65
54.5
48 / 47
49 / 49
0.11
70
56.1
47 / 47
56 / 54
0.18
62
76.9
52 / 51
54 / 53
0.22
65
82.0
50 / 50
52 / 52
0.24
70
85.7
49 / 49
60 / 58
0.47
62
110.5
56 / 55
58 / 57
0.53
65
120.7
54 / 53
57 / 56
0.60
70
128.2
53 / 52
54 / 53
0.12
84
92.3
50 / 50
52 / 52
0.14
89
97.5
49 / 49
51 / 50
0.16
95
101.2
48 / 48
58 / 56
0.27
84
131.0
53 / 53
56 / 55
0.31
89
141.2
52 / 51
54 / 54
0.35
95
148.6
51 / 50
60 / 58
0.47
84
160.1
56 / 55
58 / 57
0.53
89
174.9
54 / 54
57 / 56
0.60
95
185.9
53 / 53
53 / 52
0.08
105
101.6
49 / 49
51 / 50
0.09
112
106.6
48 / 48
50 / 49
0.11
119
110.0
47 / 47
56 / 55
0.19
105
149.1
52 / 52
54 / 53
0.22
112
159.3
51 / 50
53 / 52
0.25
119
166.8
49 / 49
59 / 57
0.33
105
183.3
55 / 54
57 / 56
0.37
112
198.5
53 / 53
55 / 55
0.42
119
209.9
52 / 52
61 / 58
0.47
105
207.3
56 / 55
59 / 57
0.53
112
226.6
55 / 54
57 / 56
0.60
119
240.7
53 / 53
53 / 52
0.08
115
112.1
49 / 49
51 / 51
0.09
122
117.7
48 / 48
50 / 49
0.11
130
121.5
47 / 47
56 / 55
0.19
115
162.9
52 / 52
54 / 53
0.22
122
174.0
51 / 50
53 / 52
0.25
130
182.2
49 / 49
59 / 57
0.32
115
199.6
55 / 54
57 / 56
0.36
122
216.1
53 / 53
55 / 55
0.41
130
228.4
52 / 52
61 / 58
0.47
115
227.4
56 / 55
59 / 57
0.52
122
248.5
55 / 54
57 / 56
0.59
130
263.9
54 / 53

Conversions:
2119 SCFM = 1 m/s
196.8 FPM = 1 m/s
3.412 MBH = 1 kW
(F-32) 5/9 = C
1 In. W.C. = 248.8 Pa
1 LB. = 0.453 kg
Notes:
1.) Data certified in accordance with ARI Standard 410.
2.) Capacity based on 80 F EDB, 67 F EWB, 45 F EWT. 70 GPM.
3.) Weight listed is the total weight of the dry coil.
4.) Contact product marketing for special coil requirements.

40

A.P.D.
In. W.C.
0.12
0.14
0.16
0.28
0.32
0.37
0.70
0.79
0.90
0.18
0.21
0.24
0.40
0.47
0.53
0.70
0.79
0.90
0.12
0.14
0.17
0.29
0.34
0.38
0.49
0.56
0.63
0.70
0.79
0.90
0.12
0.14
0.16
0.28
0.33
0.37
0.47
0.54
0.61
0.69
0.78
0.89

WT.
(LBS)
84
89
95
84
89
95
84
89
95
115
122
130
115
122
130
115
122
130
145
155
166
145
155
166
145
155
166
145
155
166
158
170
182
158
170
182
158
170
182
158
170
182

Performance
Data
Table PD-14 — Standard Conditions and Specifications — Chilled Water Coil
CONDITIONS
Elevation
Entering Air Temperature DB:
Entering Air Temperature WB:
Entering Water Temperature:
Water Flow Rate:
Tube Velocity:
Fouling Factor:
SPECIFICATIONS
Coil Type:
Tube Size:
Row Sizes:
Fin Type:
Fin Size:
Fin Spacing:

 0 Ft.
80 F
95
67 F
78
45 F
45
70 GPM
70 GPM
 4 Ft./Sec.
 0 HR x FT2 x F/BTU
W — Full Row Serpentine
5
/8” O.D. x 0.024” TWT Copper
4,6
Prima Flo
0.0075” Aluminum
Standard — 96, 120, 144 Fins/Ft.
Optional — 80 thru 168 Fins/Ft.
Single Circuit
Yes
No

Circuiting:
Drainable:
Turbulators:
DIMENSIONAL DATA LISTING
Unit Size
10, 15
20, 25, 50
30, 35, 60, 70
40, 80

Finned Width
30.00
30.00
30.00
30.00

Fixed Finned Length
23.00
34.00
45.00
50.00

Note:
1. Above specification is for standard coil with standard fin spacing.
2. Special coils — contact Product Marketing.
3. Every order requires a coil selection.

Table PD-15 — Evaporative Cooling Performance Data and Pressure Drop — Rooftop Arrangements D,E
CFM
(cu. m/s) (cu. m/s)
Unit Size
Min.
Max.
10, 15
  800
4,500
(0.378)
(2.124)
20, 25, 50
1,600
5,500
(0.755)
(2.596)
30, 35, 60, 70 2,400
8,500
(1.133)
(4.012)
40, 80
3,200
8,500
(1.510)
(4.012)

Efficiency
Range
Min.
Max.
78
88

8” Saturation
Efficiency
Range
Min.
Max.
89
92

77

88

88

92

77

86

88

92

77

86

87

92

12” Saturation
8” or 12” Deep Media
Face Area
Size
Ft.2 (m2)
In. (mm)
7.01
31 x 32 9/16
(0.65)
(787) (827)
9.38
31 x 43 9/16
(0.87)
(787) (1106)
11.75
31 x 54 9/16
(1.09)
(787) (1386)
12.92
31 x 60
(1.20)
(787) (1524)

Pressure Drop
in. of Water
(KPa)
(KPa)
Min.
Max.
0.03
0.23
(0.01)
(0.06)
0.03
0.20
(0.01)
(0.05)
0.05
0.30
(0.01)
(0.07)
0.07
0.28
(0.02)
(0.07)

Note:
1. These weights are for evaporative cooler only.

Chart PD-3 — Evaporative Cooler Efficiency/A.P.D. Chart

CELdek® Evaporative Media
The Trane Evaporative Cooler uses
high efficiency CELdek® media.
CELdek® is made from a special
cellulose paper, impregnated with
insoluble anti-rot salts and rigidifying
saturants. The cross fluted design of
the pads induces high-turbulent
mixing of air and water for optimum
heat and moisture transfer. The Trane
evaporative coolers are standard with
eight-inch deep media which produce
high efficiency and high face
velocities, along with a two-inch
distribution pad to disperses the water
evenly over the pads. We offer an
optional 12-inch deep media (see chart
at right for efficiencies).

41

(1)
“A” Unit Shipping
Width
Wt.
In. (mm) lb. (kg)
3
32 /4
137
(832)
(62)
43 3/4
166
(1111)
(75)
54 3/4
192
(1391)
(87)
60 1/4
206
(1530)
(93)

(1)
Operating
Wt.
lb. (kg)
301
(136)
386
(175)
468
(212)
509
(231)

Electrical
Data
Rooftop Gas Heating Units — Motor Electrical Data
Voltage
115/60/1 ODP
208/60/1 ODP
230/60/1 ODP
208/60/3 ODP
230/60/3 ODP
460/60/3 ODP
575/60/3 ODP
115/60/1 TE
208/60/1 TE
230/60/1 TE
208/60/3 TE
230/60/3 TE
460/60/3 TE
575/60/3 TE
115/60/1 HEODP
208/60/1 HEODP
230/60/1 HEODP
208/60/3 HEODP
230/60/3 HEODP
460/60/3 HEODP
575/60/3 HEODP
115/60/1 HETE
208/60/1 HETE
230/60/1 HETE
208/60/3 HETE
230/60/3 HETE
460/60/3 HETE
575/60/3 HETE
208/60/3 2S1W
230/60/3 2S1W
460/60/3 2S1W
575/60/3 2S1W
115/60/1 2S2W
208/60/1 2S2W
230/60/1 2S2W
208/60/3 2S2W
230/60/3 2S2W
460/60/3 2S2W
575/60/3 2S2W

/2 HP
7.2
4.3
4.3
2.8
2.8
1.4
1.1
9.0
3.9
4.5
2.1
2.2
1.1
0.9
5.2
2.8
2.6
1.8
1.6
0.8
NA
5.5
NA
2.8
NA
4.6
2.3
NA
NA
NA
NA
NA
9.2/6.0
NA
4.6/3.0
2.4/1.6
2.1/1.4
1.1/0.7
NA
1

/4 HP
10.9
6.0
5.5
2.6
2.6
1.3
1.4
11.4
4.5
5.7
2.8
2.8
1.4
1.3
6.4
4.2
5.2
2.5
2.3
1.2
NA
7.6
NA
3.8
NA
6.3
3.2
NA
NA
NA
NA
NA
9.2/4.6
5.0/2.5
4.6/2.3
3.0/1.9
2.7/1.7
1.3/0.9
NA
3

1 HP
13.4
6.7
6.7
3.2
3.2
1.6
1.5
13.6
6.8
6.8
3.4
3.6
1.8
1.7
9.2
NA
4.6
3.6
2.8
1.4
1.1
9.2
NA
4.6
3.2
3.0
1.5
1.1
3.0/1.0
3.0/1.0
1.5/0.5
NA
11.9/6.9
6.3/3.0
6.0/3.6
3.4/2.0
3.2/2.0
1.5/1.0
NA

1 1/2 HP
18.0
9.3
9.0
4.8
4.8
2.4
1.9
17.6
8.0
8.8
4.8
4.9
2.4
1.9
12.5
NA
6.3
5.0
3.8
1.9
1.8
14.0
NA
7.0
4.6
4.2
2..1
1.8
4.4/1.8
4.4/1.8
2.2/1.9
NA
NA
NA
NA
5.0/2.6
4.8/2.9
2.3/1.3
NA

2 HP
26.0
11.5
13.0
6.2
6.2
3.1
2.5
24.6
12.3
12.3
6.4
6.4
3.2
2.6
16.4
NA
8.2
6.7
5.4
2.7
2.3
19.2
NA
9.6
6.2
5.8
2.9
2.4
6.2/3.0
5.9/2.9
3.1/1.3
NA
NA
NA
NA
6.5/3.5
6.3/3.5
3.0/1.7
NA

Notes:
1. ODP = Open Drip-proof
2. TE = Totally enclosed
3. HEODP = High Efficiency Open Drip-proof
4. HETE = High Efficiency Totally Enclosed
5. 2S1W = Two Speed One Winding
6. 2S2W = Two Speed Two Winding
7. NA = Not Available
FLA based on NEC Ratings

42

3 HP
33.0
16.5
16.5
8.4
8.4
4.2
3.6
34.0
17.0
17.0
9.4
9.2
4.6
3.6
NA
NA
NA
9.2
8.0
4.0
3.2
NA
NA
NA
8.8
8.0
4.0
3.2
9.0/3.4
8.0/3.3
3.8/1.6
NA
NA
NA
NA
9.3/4.9
8.5/4.6
4.6/2.7
NA

5 HP
NA
NA
NA
12.2
12.2
6.1
5.3
NA
NA
NA
14.0
13.0
6.5
5.1
NA
NA
NA
14.7
12.8
6.4
5.2
NA
NA
NA
14.7
12.0
6.0
4.8
15.0/6.0
14.0/6.2
6.8/2.8
NA
NA
NA
NA
NA
NA
NA
NA

7 1/2 HP
NA
NA
NA
24.0
21.6
10.8
8.6
NA
NA
NA
21.8
20.4
10.2
7.6
NA
NA
NA
22.1
19.2
9.6
7.7
NA
NA
NA
21.4
18.8
9.4
7.5
21.0/7.5
19.5/7.5
10.0/4.0
NA
NA
NA
NA
20.0/11.0
19.0/10.0
9.7/5.5
NA

10 HP
NA
NA
NA
28.0
26.6
13.3
10.6
NA
NA
NA
28.7
26.4
13.2
9.6
NA
NA
NA
29.0
25.2
25.2
10.1
NA
NA
NA
29.0
25.2
12.6
10.2
29.0/9.6
25.0/9.3
12.0/4.3
NA
NA
NA
NA
27.0/14.0
25.0/12.5
12.2/7.0
NA

15 HP
NA
NA
NA
44.9
40.6
20.3
15.6
NA
NA
NA
42.6
28.4
19.2
14.4
NA
NA
NA
40.0
36.0
18.0
14.5
NA
NA
NA
41.2
37.0
18.5
14.9
NA
NA
18.0/6.0
NA
NA
NA
NA
NA
NA
NA
NA

Controls

Pilot Control
Intermittent pilot ignition is standard on
all outdoor units. 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.
Energy savings will be realized using
this system as the pilot is extinguished
in the off cycle.
Air Inlet Configuration
The air inlet configuration defines the
entering air opening for the rooftop gas
heating units. This selection does not
include dampers and must match the
required opening for the air control and
damper arrangement. A horizontal
return air feature is offered on air inlet
configurations 3 and 4.
Air Inlet Configuration

1

4 

2

5

3 

See Note
Below

Outside Air or Return Air
Two-Position Motor/Spring Return
Units with outside air or return air only
shall be provided with damper, twoposition spring return damper motor
and controls. The motor shall power
the damper full open when the unit is
on and full closed when the unit is off.
Outside Air/Return Air
Two-Position Spring Return
Two-position spring return motor with
interlocked outside and return air
dampers shall be provided. The motor
shall power either the outside air
damper full open and the return air
damper full closed or the outside air
damper full closed and the return air
damper full open in response to an
outside air temperature sensor. When
the unit is off, the motor will drive the
outside air damper full closed and the
return air damper full open.
Outside Air/Return Air Modulating
Motor W/Mixed Air Control/Minimum
Position Potentiometer/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller located in the
mixed air stream. Units shall also be
provided with a minimum position
potentiometer for minimum outside air
damper position.

Note: Horizontal outside air over return
air. Specify air inlet configuration 4 or 5
and then select miscellaneous option
“D” for horizontal return.

The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is off.

Damper Options
Dampers shall be of the opposed blade
type, constructed of galvanized steel
with neoprene nylon bushings, blades
to be mechanically interlocked.

Outside Air/Return Air Modulating
Motor W/Mixed Air Temperature
Control/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller located in the
mixed air stream.

Optional low leak dampers shall be of
the opposed blade type, construction
of galvanized steel with neoprene
nylon bushings and vinyl blade edge
seals, blades to be mechanically
interlocked.

The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is off.

43

Outside Air/Return Air Modulating
Motor W/Minimum Position
Potentiometer/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall position the
outside and return air dampers in
response to a manually set
potentiometer. The spring return
feature drives the outside air damper
full closed and the return air damper
full open when the unit is off.
Outside Air/Return Air Modulating
Motor W/Dry Bulb/ Mixed Air
Temperature Control and Minimum
Position Potentiometer/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate the
position of the outside and return air
dampers in response to a thermostatic
controller and dry bulb thermostat
located in the mixed air stream. Units
shall also be provided with a minimum
position potentiometer for minimum
outside air damper position. The spring
return feature drives the outside air
damper full open and the return air
damper full closed when the unit is off.
Outside Air/Return Air Modulating
Motor W/Enthalpy Controlled
Economizer/Spring Return
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to an enthalpy controlled
economizer. When the unit is off, the
motor will drive the outside air damper
full closed and the return air damper
full open.

Controls

Outside Air/Return Air Modulating
Motor W/Space Pressure Controller
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to a pressure sensor located
in the building. Non-spring return.
Outside Air/Return Air Modulating
Motor W/S-350P Proportional Mixed
Air Control/Spring Return
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to a solid-state mixed air
sensor and S-350 proportional
controller. When the unit is off the
motor will drive the outside air damper
full closed and the return air damper
full open.
Outside Air/Return Air Modulating
Motor W/External 4-20 mA or
0-10 VDC Analog Input/Spring Return
Modulating motor interlocked with
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a 4-10 mA
or 0-10 VDC signal supplied by an
external DDC controller. The spring
return feature drives the outside air
damper full closed and the return air
damper full open when the unit is shut
down.
ASHRAE Cycle I - Outside/Return Air
Two Position W/Warm-Up Stat/Spring
Return
Two position spring return motor with
interlocked outside and return air
dampers shall be provided. The motor
shall power the outside air damper full
open after a warm up period
determined by a minimum supply air
temperature sensor when the unit is
on, and full closed when the unit is off.

44

ASHRAE Cycle II - Outside Air/Return
Air Modulating Motor W/Warm-Up
Stat/Mixed Air Temperature
Controller/Minimum Position
Potentiometer/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate the
position of the outside and return air
dampers in response to a thermostatic
controller located in the mixed air
stream after a warm up period
determined by a minimum supply air
temperature sensor. Units shall also be
provided with a minimum position
potentiometer for minimum outside air
damper position. When the unit is off,
the motor will drive the outside air
damper full closed and the return air
damper full open.
ASHRAE CYCLE III - Outside Air/
Return Air Modulating Motor W/
Warm-Up Thermostat/Mixed Air
Temperature Controller/Spring Return
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to a thermostatic controller
located in the mixed air stream after a
warm up period determined by a
minimum supply air temperature
sensor. Units shall also be provided
with a minimum position
potentiometer for minimum outside air
damper position. When the unit is off,
the motor will drive the outside air
damper full closed and the return air
damper full open.
Manual Dampers
Units with outside air and return air
shall be provided with manually set
outside and return air dampers.

Controls

Gas Controls
Gas Control Reference
1 Stage
2 Stage
Modulation
Furnace
1

Furnace
2

1 Stage
2 Stage
4 Stage
Modulation

Furnace
1

AIRFLOW

Single Furnace
Capacities “10-40”

Two-Stage Gas Valve
Provides two stages of heat. Ignition is
at low fire (one half of the unit’s full
rated input). Requires the use of an
optional two-stage thermostat.
Hydraulic Modulating Gas Valve
Provides modulated heat output.
Ignition is at low fire (one half of the
unit’s full rated input), and a discharge
air temperature sensing bulb located in
the air stream shall modulate the gas
input from 40 percent to 100 percent
rated input. Provided with an
automatic electric valve in series with
the hydraulic valve which cycles the
unit in response to an optional low
voltage single-stage thermostat.
Hydraulic Modulating Gas Valve with
Bypass
Provides modulated heat output.
Ignition is at low fire (one half of the
unit’s full rated input), and a discharge
temperature sensing bulb located in
the air stream shall modulate the gas
input from 40 percent to 100 percent
rated input. Provided with an
automatic electric valve in series with
the hydraulic valve which cycles the
unit. An additional electric valve in
parallel bypasses the hydraulic
modulating valve, overriding the
discharge temperature sensing bulb,
allowing full fire. Requires the use of an
optional thermostat to control the
electric valve.

Furnace
3

AIRFLOW

Dual Furnace
Capacities “50-80”

Single-Stage Control
Outdoor 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
(thermostat not included).

Furnace
2

1 Stage
2 Stage
3 Stage
6 Stage
Modulation

Triple Furnace
Capacities “12”

Electronic Modulating — Room or
Duct Stat Control
Provides modulated heat output. An
automatic valve in series with the
modulating valve shall be provided to
cycle the unit. Ignition is at full fire (100
percent input), and modulates the gas
input from 100 percent to 40 percent
rated input.
Available for use with a 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’s setpoint.
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. When “furnace one only” is
specified on double and triple
furnaces, additional furnace sections
will have single-stage on-off control.
Discharge Air Control with
Outside Air Reset
Unit provided with factory-mounted
discharge air controller, discharge air
sensor, outdoor air reset, summer/
winter thermostat and velocity
pressure switch. The outdoor air reset
range is from 10 F to 60 F. Full reset
occurs at 10 F outside air temperature.

45

There is a straight line relationship
between outside air temperature and
reset. Therefore, at 60 F outside air
temperature, no reset will occur. The
amount of reset is adjustable from 20 F
to 50 F.
Discharge air controller provides twominute delay between successive on
and off stages. A summer/winter
thermostat locks out heating when
outside air temperature is above 55 F.
The velocity pressure switch is
provided for protection against high
temperatures at low airflows. Available
in two-stage (half of the unit’s full rated
input-single furnace units only), threestage (33 percent of the unit’s full rated
input) and four-stage (25 percent of the
unit’s full rated input). Three and fourstage available on double and triple
furnace units only.
S-350 Modular Electronic Control
System
Basic system utilizes a controller
module with discharge air sensor,
setpoint and one-stage output, a stage
module with differential setpoint and
one-stage output and a display module
with LCD display for temperature
readout. The system stages the unit’s
rate of fire based upon sensed
discharge air temperature, setpoint
setting and differential setting between
stages. Provided as a two-stage (all
furnaces), three and four-stage (double
and triple furnaces only) and six-stage
(triple furnace only).

Dimensional
Data
Rooftop Gas Duct Furnace — Arrangement A
Single Furnace 10-40 (100-400 MBh)

NATURAL VENT (MODELS 10-40)
(Left Hand Service Access Shown)

POWER VENT (MODELS 10-40)
(Left Hand Service Access Shown)

46

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

Dimensional
Data
Unit Dimensional Data — Rooftop Gas Duct Furnace — Arrangement A
D

Capacity
10
15
20
25
30
35
40

A
32 7/8
(835)
32 7/8
(835)
43 7/8
(1114)
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
15 9/16
(395)
18 5/16
(465)
23 13/16
(605)
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
12
(305)
21 1/2
(546)
23 1/2
(597)
23 1/2
(597)
26
(660)
26
(660)
26
(660)

AGA
11
(279)
16
(406)
16
(406)
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

Gas Inlet
CGA
20 11/16
(525)
25 3/16
(640)
25 3/16
(640)
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
19 3/8
(492)
23 1/2
(597)
26 1/4
(667)
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

K
30 3/16
(767)
30 3/16
(767)
41 3/16
(1046)
41 3/16
(1046)
52 3/16
(1326)
52 3/16
(1326)
57 11/16
(1465)

NOTE:
DIMENSIONS ARE IN INCHES (DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS).
*“F’’ DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).

Gravity Vent Model

Power Vent Model

47

NAT
1
/2

LP
1
/2

/2

1

/2

/2

1

1

/2

1

/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Gas Duct Furnace — Arrangement A
Double Furnace 50-80 (500-800 MBh)
Standard (40-120°) Temperature Rise Furnace

NATURAL VENT (MODELS 50-80)
(Left Hand Service Access Shown)

POWER VENT (MODELS 50-80)
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

48

Dimensional
Data
Unit Dimensional Data — Rooftop Gas Duct Furnace — Arrangement A
D

Capacity
50
60
70
80

A
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
26
(660)
26
(660)
26
(660)

AGA
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

Gas Inlet
CGA
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

NOTE:
DIMENSIONS ARE IN INCHES (DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS).
*“F’’ DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).

49

*F
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

K
41 3/16
(1046)
52 3/16
(1326)
52 3/16
(1326)
57 11/16
(1465)

NAT
3
/4

LP
/2 OR 3/4

1

/4

1

/4

1

/4

1

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Gas Duct Furnace — Arrangement A
Triple Furnace 12 (1200 MBh)
Standard (40-120°) Temperature Rise Furnace

NATURAL VENT (MODEL 12)
(Left Hand Service Access Shown)

POWER VENT (MODEL 12)
(Left Hand Service Access Shown)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

50

Dimensional
Data
Unit Dimensional Data — Rooftop Gas Duct Furnace — Arrangement A
D

Capacity
12

A
60 3/8
(1534)

B
45 13/16
(1164)

C
26
(660)

AGA
17 1/2
(445)

Gas Inlet
CGA
26 11/16
(678)

NOTE:
DIMENSIONS ARE IN INCHES (DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS).
*“F’’ DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).

51

*F
51
(1295)

K
57 11/16
(1465)

NAT
3
/4

LP
/2 OR 3/4

1

Dimensional
Data
Standard Blower Module for Arrangements B, C, D, E
Unit Sizes 10-80 (100-800 MBh)

Model
10/15
20/25/50
30/35
60/70
40/80

A
32 7/8”
(835)
43 7/8”
(1114)
54 7/8”
(1394)
60 3/4”
(1534)

B
15 9/16”
(395)
23 13/16”
(605)
34 13/16”
(884)
45 13/16”
(1164)

J
24”
(610)
35”
(889)
46”
(1168)
51 1/2”
(1308)

STANDARD BLOWER MODULE
Unit Sizes 10-80
(Left Hand Service Access Shown)
Note: The dimensions shown do not include base skid rail.

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

52

Dimensional
Data
Detail Drawing
High CFM Blower Module for Arrangements G, J
Unit Sizes 10-12 (100-1200 MBh)
100 and 150 MBh Units Not Available on Arrangements G and J

Model
10/15*
20/25/50
30/35
60/70
40/80/12

A
32 7/8”
(835)
43 7/8”
(1114)
54 7/8”
(1394)
60 3/8”
(1534)

B
15 9/16”
(395)
23 13/16”
(605)
34 13/16”
(884)
45 13/16”
(1164)

∆J
24”
(610)
35”
(889)
46”
(1168)
51 1/2”
(1308)

HIGH CFM BLOWER MODULE
*For Cooling Arrangements Only
(Left Hand Service Access Shown)
Note: The dimensions shown do not include base skid rail.

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

53

Dimensional
Data
Air Intake Hood
Arrangements B, C, D, E, G, J, K, L
Unit Sizes 10-12 (100-1200 MBh)

Model
10/15

E Dimension
29 3/8”
(746)
40 3/8”
(1025)
51 3/8”
(1305)
56 7/8”
(1445)

20/25/50
30/35
60/70
40/80/12

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

54

Dimensional
Data
Over/Under Air Intake with Hood
Arrangements B, C, D, E, G, J, K, L
Unit Sizes 10-12 (100-1200 MBh)

Model
10/15

E Dimension
29 3/8”
(746)
40 3/8”
(1025)
51 3/8”
(1305)
56 7/8”
(1445)

20/25/50
30/35
60/70
40/80/12

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

55

Dimensional
Data
Over/Under Air Intake without Hood
Arrangements B, C, D, E, G, J, K, L
Unit Sizes 10-12 (100-1200 MBh)

Model
10/15

E Dimension
27 3/4”
(705)
38 3/4”
(984)
49 3/4”
(1264)
55 1/4”
(1403)

20/25/50
30/35
60/70
40/80/12

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

56

Dimensional
Data
Supply Plenum Module
Arrangements C, E, J, L
Unit Sizes 10-12 (100-1200 MBh)

Note: The dimensions shown do not include base skid rail.
Model
10/15
20/25/50
30/35
60/70
40/80/12

A
32 7/8”
(835)
43 7/8”
(1114)
54 7/8”
(1394)
60 3/8”
(1534)

J
24”
(610)
35”
(889)
46”
(1168)
51”
(1295)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

57

Dimensional
Data
Coil Module
Arrangements K, L
Unit Sizes 10-80 (100-800 MBh)

Model
10/15

A
32 7/8”
(835)
43 7/8”
(1114)
54 7/8”
(1394)
60 3/8”
(1534)

20/25/50
30/35
60/70
40/80

DIMENSIONS ARE IN INCHES, DIMENSIONS
IN PARENTHESIS ARE IN MILLIMETERS.

Maximum Coil Dimensions
Unit Size
10/15
20/25/50
30/35/60/70
40/80

“L” Inside Max.
Cabinet Opening
32 1/4” (794)
42 1/4” (1073)
53 1/4” (1353)
58 3/4” (1492)

Side Opening of Cooling Module

• The coil section drain pan connection is 3/4 inch NPT pipe thread. It is a female fitting that
just protrudes outside of the unit base rail. It is located on the service side of the unit.
• The drain pan is constructed of stainless steel, including the fitting. It is sloped towards
the center of the pan and level across the width of the unit.
• P-trap required external to the unit provided by others.
58

Dimensional
Data
Evaporative Cooler Module
Arrangements D, E
Unit Sizes 10-80 (100-800 MBh)

EVAPORATIVE COOLER MODULE
Models 10/80
Model
10/15

A
32 7/8”
(835)
43 7/8”
(1114)
54 7/8”
(1394)
60 3/8”
(1534)

20/25/50
30/35
60/70
40/80

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

59

Dimensional
Data
Rooftop Heating Unit with Standard Blower — Arrangement B
Models GRAA, GRBA, GRCA, GRDA
10, 15, 20, 25, 30, 35, 40 (100-400 MBh) Single Furnace
Standard (20-60 F) and High (60-90 F) Temperature Rise Furnace

ARRANGEMENT “B“
MODELS 10-40
NATURAL VENT
(Left Hand Service Access Shown)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

ARRANGEMENT “B“
MODELS 10-40
POWER VENT
(Left Hand Service Access Shown)
60

Dimensional
Data
Unit Dimensional Data — Arrangement B 10-40 (100-400 MBh)
CAPACITY
10
15
20
25
30
35
40

A
32 7/8
(835)
32 7/8
(835)
43 7/8
(1114)
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
15 9/16
(395)
18 5/16
(465)
23 13/16
(605)
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
12
(305)
21 1/2
(546)
23 1/2
(597)
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
11
(279)
16
(406)
16
(406)
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
20 11/16
(525)
25 3/16
(640)
25 3/16
(640)
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
19 3/8
(492)
23 1/2
(597)
26 1/4
(667)
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.

Power Vented Model

61

G
31 1/16
(789)
31 1/16
(789)
42 1/16
(1068)
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
24
(610)
24
(610)
35
(889)
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
1
1
/2
/2
/2

1

/2

1

/2

1

/2

1

/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with Standard Blower — Arrangement B
Models GRAA, GRBA — 50, 60, 70, 80 (500-800 MBh)
Double Furnace
Standard (40-120 F) Temperature Rise Furnace

ARRANGEMENT “B“
MODELS 50-80
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “B“
MODELS 50-80
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

62

Dimensional
Data
Unit Dimensional Data — Arrangement B — 50-80 (500-800 MBh)
CAPACITY
50
60
70
80

A
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.

Gravity Vent Model

63

G
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4
/4

1

/4

1

/4

1

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with Standard Blower and Downflow Supply Plenum —
Arrangement C
Models GRAA, GRBA, GRCA, GRDA — 10, 15, 20, 25, 30, 35, 40 (100-400 MBh)
Single Furnace
Standard (20-60 F) and high (60-90 F) Temperature Rise Furnace

ARRANGEMENT “C“
MODELS 10-40
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “C“
MODELS 10-40
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

64

Dimensional
Data
Unit Dimensional Data — Arrangement C — 10-40 (100-400 MBh)
CAPACITY
10
15
20
25
30
35
40

A
32 7/8
(835)
32 7/8
(835)
43 7/8
(1114)
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
15 9/16
(395)
18 5/16
(465)
23 13/16
(605)
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
12
(305)
21 1/2
(546)
23 1/2
(597)
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
11
(279)
16
(406)
16
(406)
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
20 11/16
(525)
25 3/16
(640)
25 3/16
(640)
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
19 3/8
(492)
23 1/2
(597)
26 1/4
(667)
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.
“J” DIMENSION IS AN INSIDE DIMENSION FOR SUPPLY AIR (WITHOUT DAMPER).

Power Vent Model

65

G
31 1/16
(789)
31 1/16
(789)
42 1/16
(1068)
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
24
(610)
24
(610)
35
(889)
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
1
1
/2
/2
/2

1

/2

1

/2

1

/2

1

/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with Standard Blower and Downflow Supply Plenum —
Arrangement C
Models GRAA, GRBA — 50, 60, 70, 80 (500-800 MBh)
Double Furnace
Standard (40-120 F) Temperature Rise Furnace

ARRANGEMENT “C“
MODELS 50-80
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “C“
MODELS 50-80
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

66

Dimensional
Data
Unit Dimensional Data — Arrangement C — 50-80 (500-800 MBh)
CAPACITY
50
60
70
80

A
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.
“J” DIMENSION IS AN INSIDE DIMENSION FOR SUPPLY AIR (WITHOUT DAMPER).

67

G
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4
/4

1

/4

1

/4

1

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with Standard Blower and Evaporative Cooler —
Arrangement D
Models GRAA, GRBA, GRCA, GRDA — 10, 15, 20, 25, 30, 35, 40 (100-400 MBh)
Single Furnace
Standard (20-60 F) and High (60-90 F) Temperature Rise Furnace

ARRANGEMENT “D“
MODELS 10-40
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “D“
MODELS 10-40
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

68

Dimensional
Data
Unit Dimensional Data — Arrangement D — 10-40 (100-400 MBh)
CAPACITY
10
15
20
25
30
35
40

A
32 7/8
(835)
32 7/8
(835)
43 7/8
(1114)
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
15 9/16
(395)
18 5/16
(465)
23 13/16
(605)
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
12
(305)
21 1/2
(546)
23 1/2
(597)
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
11
(279)
16
(406)
16
(406)
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
20 11/16
(525)
25 3/16
(640)
25 3/16
(640)
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
19 3/8
(492)
23 1/2
(597)
26 1/4
(667)
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.

69

G
31 1/16
(789)
31 1/16
(789)
42 1/16
(1068)
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
24
(610)
24
(610)
35
(889)
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
1
1
/2
/2
/2

1

/2

1

/2

1

/2

1

/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with Standard Blower and Evaporative Cooler —
Arrangement D
Models GRAA, GRBA — 50, 60, 70, 80 (500-800 MBh)
Double Furnace
Standard (40-120 F) Temperature Rise Furnace

ARRANGEMENT “D“
MODELS 50-80
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “D“
MODELS 50-80
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

70

Dimensional
Data
Unit Dimensional Data — Arrangement D — 50-80 (500-800 MBh)
CAPACITY
50
60
70
80

A
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.

71

G
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4
/4

1

/4

1

/4

1

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with Standard Blower, Evaporative Cooler
and Downflow Supply Plenum — Arrangement E
Models GRAA, GRBA, GRCA, GRDA — 10, 15, 20, 25, 30, 35, 40 (100-400 MBh)
Single Furnace — Standard (20-60 F) and High (60-90 F) Temperature Rise Furnace

ARRANGEMENT “E“
MODELS 10-40
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “E“
MODELS 10-40
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

72

Dimensional
Data
Unit Dimensional Data — Arrangement E — 10-40 (100-400 MBh)
CAPACITY
10
15
20
25
30
35
40

A
32 7/8
(835)
32 7/8
(835)
43 7/8
(1114)
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
15 9/16
(395)
18 5/16
(465)
23 13/16
(605)
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
12
(305)
21 1/2
(546)
23 1/2
(597)
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
11
(279)
16
(406)
16
(406)
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
20 11/16
(525)
25 3/16
(640)
25 3/16
(640)
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
19 3/8
(492)
23 1/2
(597)
26 1/4
(667)
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.
“J” DIMENSION IS AN INSIDE DIMENSION FOR SUPPLY AIR (WITHOUT DAMPER).

73

G
31 1/16
(789)
31 1/16
(789)
42 1/16
(1068)
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
24
(610)
24
(610)
35
(889)
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
1
1
/2
/2
/2

1

/2

1

/2

1

/2

1

/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with Standard Blower, Evaporative Cooler
and Downflow Supply Plenum — Arrangement E
Models GRAA, GRBA — 50, 60, 70, 80 (500-800 MBh)
Double Furnace — Standard (40-120 F) Temperature Rise Furnace

ARRANGEMENT “E“
MODELS 50-80
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “E“
MODELS 50-80
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

74

Dimensional
Data
Unit Dimensional Data — Arrangement E — 50-80 (500-800 MBh)
CAPACITY
50
60
70
80

A
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.
“J” DIMENSION IS AN INSIDE DIMENSION FOR SUPPLY AIR (WITHOUT DAMPER).

75

G
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4
/4

1

/4

1

/4

1

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower — Arrangement G
Models GRAA, GRBA — 20, 25, 30, 35, 40 (200-400 MBh)
Single Furnace
Standard (20-60 F) Temperature Rise Furnace

ARRANGEMENT “G“
MODELS 20-40
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “G“
MODELS 20-40
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

76

Dimensional
Data
Unit Dimensional Data — Arrangement G — 20-40 (200-400 MBh)
CAPACITY
20
25
30
35
40

A
43 7/8
(1114)
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
23 13/16
(605)
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
26 1/4
(667)
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.

77

G
42 1/16
(1068)
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
1
1
/2
/2
/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower — Arrangement G
Models GRAA, GRBA — 50, 60, 70, 80 (500-800 MBh)
Double Furnace
Standard (40-120 F) Temperature Rise Furnace

ARRANGEMENT “G”
MODELS 50-80
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “G”
MODELS 50-80
POWER VENT
(Left Hand Service Access Shown)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

78

Dimensional
Data
Unit Dimensional Data — Arrangement G — 50-80 (500-800 MBh)
CAPACITY
50
60
70
80

A
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.

Power Vent Model

79

G
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4
/4

1

/4

1

/4

1

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower — Arrangement G
Models GRAA, GRBA — 12 (1200 MBh)
Triple Furnace
Standard (60-180 F) Temperature Rise Furnace

ARRANGEMENT “G”
MODEL 12
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “G”
MODEL 12
POWER VENT
(Left Hand Service Access Shown)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

80

Dimensional
Data
Unit Dimensional Data — Arrangement G — 12 (1200 MBh)
CAPACITY
12

A
60 3/8
(1534)

B
45 13/16
(1164)

C
26
(660)

A.G.A.
D
17 1/2
(445)

C.G.A.
D
26 11/16
(678)

*F
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR RETURN AIR DAMPERS.

81

G
58 9/16
(1487)

J
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower and Downflow Supply Plenum —
Arrangement J
Models GRAA, GRBA — 20, 25, 30, 35, 40 (200-400 MBh)
Single Furnace
Standard (20-60 F) Temperature Rise Furnace

ARRANGEMENT “J”
MODEL 20-40
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “J”
MODEL 20-40
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

82

Dimensional
Data
Unit Dimensional Data — Arrangement J — 20-40 (200-400 MBh)
CAPACITY
20
25
30
35
40

A
43 7/8
(1114)
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
23 13/16
(605)
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
26 1/4
(667)
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.
“J” DIMENSION IS AN INSIDE DIMENSION FOR SUPPLY AIR (WITHOUT DAMPER).

Gravity Vent Model

83

G
42 1/16
(1068)
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
1
1
/2
/2
/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower and Downflow Supply Plenum —
Arrangement J
Models GRAA, GRBA — 50, 60, 70, 80 (500-800 MBh)
Double Furnace
Standard (40-120 F) Temperature Rise Furnace

ARRANGEMENT “J”
MODELS 50-80
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “J”
MODELS 50-80
POWER VENT
(Left Hand Service Access Shown)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

84

Dimensional
Data
Unit Dimensional Data — Arrangement J — 50-80 (500-800 MBh)
CAPACITY
50
60
70
80

A
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.
“J” DIMENSION IS AN INSIDE DIMENSION FOR SUPPLY AIR (WITHOUT DAMPER).

85

G
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4
/4

1

/4

1

/4

1

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower and Downflow Supply Plenum —
Arrangement J
Models GRAA, GRBA — 12 (1200 MBh)
Triple Furnace
Standard (60-180 F) Temperature Rise Furnace

ARRANGEMENT “J”
MODEL 12
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “J”
MODEL 12
POWER VENT
(Left Hand Service Access Shown)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

86

Dimensional
Data
Unit Dimensional Data — Arrangement J — 12 (1200 MBh)
CAPACITY
12

A
60 3/8
(1534)

B
45 13/16
(1164)

C
26
(660)

A.G.A.
D
17 1/2
(445)

C.G.A.
D
26 11/16
(678)

*F
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.
“J” DIMENSION IS AN INSIDE DIMENSION FOR SUPPLY AIR (WITHOUT DAMPER).

Gravity Vent Model

87

G
58 9/16
(1487)

J
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower and Coil Cabinet — Arrangement K
Models GRAA, GRBA, GRCA, GRDA — Single Furnace
10, 15, 20, 25, 30, 35, 40 (100-400 MBh) — Std. (20-60 F) Temperature Rise Furnace
20, 25, 30, 35, 40 (200-400 MBh) — High (60-90 F) Temperature Rise Furnace

ARRANGEMENT “K“
MODELS 10-40
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “K“
MODELS 10-40
POWER VENT
(Left Hand Service Access Shown)
DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

88

Dimensional
Data
Unit Dimensional Data — Arrangement K — 10-40
CAPACITY
10
15
20
25
30
35
40

A
32 7/8
(835)
32 7/8
(835)
43 7/8
(1114)
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
15 9/16
(395)
18 5/16
(465)
23 13/16
(605)
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
12
(305)
21 1/2
(546)
23 1/2
(597)
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
11
(279)
16
(406)
16
(406)
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
20 11/16
(525)
25 3/16
(640)
25 3/16
(640)
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
19 3/8
(492)
23 1/2
(597)
26 1/4
(667)
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.

89

G
31 1/16
(789)
31 1/16
(789)
42 1/16
(1068)
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
24
(610)
24
(610)
35
(889)
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
1
1
/2
/2
/2

1

/2

1

/2

1

/2

1

/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower and Coil Cabinet — Arrangement K
Models GRAA, GRBA — 50, 60, 70, 80 (500-800 MBh)
Double Furnace
Standard (40-120 F) Temperature Rise Furnace

ARRANGEMENT “K“
MODELS 50-80
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “K“
MODELS 50-80
POWER VENT
(Left Hand Service Access Shown)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

90

Dimensional
Data
Unit Dimensional Data — Arrangement K — 50-80 (500-800 MBh)
CAPACITY
50
60
70
80

A
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.

91

G
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4
/4

1

/4

1

/4

1

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower, Coil Cabinet and
Downflow Supply Plenum — Arrangement L
Models GRAA, GRBA, GRCA, GRDA — Single Furnace
10, 15, 20, 25, 30, 35, 40 (100-400 MBh) — Std. (20-60 F) Temperature Rise Furnace
20, 25, 30, 35, 40 (200-400 MBh) — High (60-90 F) Temperature Rise Furnace

ARRANGEMENT “L“
MODELS 10-40
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “L“
MODELS 10-40
POWER VENT
(Left Hand Service Access Shown)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

92

Dimensional
Data
Unit Dimensional Data — Arrangement L — 10-40 (100-400 MBh)
CAPACITY
10
15
20
25
30
35
40

A
32 7/8
(835)
32 7/8
(835)
43 7/8
(1114)
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
15 9/16
(395)
18 5/16
(465)
23 13/16
(605)
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
12
(305)
21 1/2
(546)
23 1/2
(597)
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
11
(279)
16
(406)
16
(406)
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
20 11/16
(525)
25 3/16
(640)
25 3/16
(640)
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
19 3/8
(492)
23 1/2
(597)
26 1/4
(667)
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.
“J” DIMENSION IS AN INSIDE DIMENSION FOR SUPPLY AIR (WITHOUT DAMPER).

93

G
31 1/16
(789)
31 1/16
(789)
42 1/16
(1068)
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
24
(610)
24
(610)
35
(889)
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
1
1
/2
/2
/2

1

/2

/2

1

1

/2

1

/4

1

/4

1

/4

1

/4

1

3

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Heating Unit with High Cfm Blower, Coil Cabinet
and Downflow Supply Plenum — Arrangement L
Models GRAA, GRBA — 50, 60, 70, 80 (500-800 MBh)
Double Furnace — Standard (40-120 F) Temperature Rise Furnace

ARRANGEMENT “L“
MODELS 50-80
NATURAL VENT
(Left Hand Service Access Shown)

ARRANGEMENT “L“
MODELS 50-80
POWER VENT
(Left Hand Service Access Shown)

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

94

Dimensional
Data
Unit Dimensional Data — Arrangement L — 50-80 (500-800 MBh)
CAPACITY
50
60
70
80

A
43 7/8
(1114)
54 7/8
(1394)
54 7/8
(1394)
60 3/8
(1534)

B
29 5/16
(745)
34 13/16
(884)
40 5/16
(1024)
45 13/16
(1164)

C
23 1/2
(597)
26
(660)
26
(660)
26
(660)

A.G.A.
D
16
(406)
17 1/2
(445)
17 1/2
(445)
17 1/2
(445)

C.G.A.
D
25 3/16
(640)
26 11/16
(678)
26 11/16
(678)
26 11/16
(678)

*F
34 1/2
(876)
37 1/4
(946)
45 1/2
(1156)
51
(1295)

NOTE:
DIMENSIONS ARE IN INCHES, DIMENSIONS IN PARENTHESIS ARE IN MILLIMETERS.
*“F” DIMENSION IS THE RECOMMENDED CLEARANCE TO SERVICE THE BURNER DRAWER(S).
“J” DIMENSION IS AN OUTSIDE DIMENSION FOR OUTSIDE OR RETURN AIR DAMPERS.
“J” DIMENSION IS AN INSIDE DIMENSION FOR SUPPLY AIR (WITHOUT DAMPER).

95

G
42 1/16
(1068)
53 1/16
(1348)
53 1/16
(1348)
58 9/16
(1487)

J
35
(889)
46
(1168)
46
(1168)
51 1/2
(1308)

GAS INLET
NAT
LP
3
1
/4
/2 OR 3/4
/4

1

/4

1

/4

1

3

3

3

/2 OR 3/4
/2 OR 3/4
/2 OR 3/4

Dimensional
Data
Rooftop Gas Heating Unit — Arrangements B-L
Roof Curb
10, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80, 12

DIMENSIONS ARE IN INCHES, DIMENSIONS IN
PARENTHESIS ARE IN MILLIMETERS.

96

Dimensional
Data
Roof Opening

Section Y-Y

Model
10,15
20,25,50
30,35,60,70
40,80,12

D
24”
(610)
35”
(889)
46”
(1168)
51 1/2”
(1308)

E
26”
(660)
37”
(940)
48”
(1219)
53 1/2”
(1359)

Arrg.
C&E
C&E
J
L
G
J
K
G
J&K
L

Cap.
10/40
50/80
12
50/80
50/80
20/40
10/40
12
50/80
10/40

Section X-X

B
18 7/8 (479)
19 3/8 (492)
18 7/8
(479)
19 1/8
(486)

Detail A

19 1/4
(489)

Capacity (CA)
10/15
20/25/50
30/35/60/70
40/80/12

Item #3
K
Req’d
3
4
4
5

Item #4
K
Capacity
D Req’d
10/15
24
12
20/25/50
35
14
30/35/60/70 46
14
1
40/80/12
51 /2 16

Detail D

Detail E
Arrg. Cap.
A
C&E 10-40
18 7/8 (479)
C&E 50-80
19 3/8 (492)
J 12, L 50-80
18 7/8 (479)
G 50-80, J 20-40, K 10-40 19 1/8 (486)
G 12, J&K 50-80, L 10-40 19 1/4 (489)

➀ Roof Mounting Angle
Á Curb End Rail Channel
 Screw - #10 x 5/8 Lg. Pan Hd. Type “AB” K Req’d.
à Fasteners by Others

➀ Curb Cross Brace Channel
Á Curb Side Rail Channel
 Curb End Rail Channel
à Screw - #10 x 5/8 Lg. Pan Hd. Type “AB” 8 Req’d.

Blower/Filter/Damper or Filter/Damper Area

Supply Plenum Area

97

Dimensional
Data
Curb Specifications
20 7/8”
(530)

Section
X-X

A*

Return
Air
Opening

20 7/8”
(530)

Supply
Air
Opening

Capacity
Dimension E*
10/15
26” (660)
20/25/50
37” (940)
30/35/60/70
48” (1219)
40/80/12
53 1/2” (1359
*All dimensions shown have been calculated to
include a one (1) inch clearance around return
and supply ducts.

E*

Section
Y-Y
See preceding page for Sections X-X and Y-Y.

Detail K
Section Curb Side Rail

98

Dimensional
Data
Rooftop Gas Heating Units — Arrangements D, E
Evaporative Cooler — Platform
10, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80

Evaporative Cooler
Curb/Platform 10-80

Curb Cap End Adaptor Supplied with the Unit
(one each end)

Unit/Base Rail Assembly

Unit/Curb End Rail Assembly

View A
Typ. (8) PLC’s.
➀ Evaporative Cooler Assembly
Á Curb
 1/4-20 “KEPS” Nut (8) Required
à 1/4-20 x 5/8 Lg. Hex Hd. Bolt (8) Required

See View A
Evaporative Cooler Curb/Platform Mounting Assembly

99

Weights

Table W-1 — Gravity Vented Unit and Option Weight Data (Pounds)
Arrangement
10
15
20
25
30
35
40
50
60
70
80
12

A
Net
 199
 226
 281
 306
 362
 387
 423
 614
 727
 777
 850
1264

Ship
 218
 245
 302
 327
 384
 409
 455
 711
 831
 881
 958
1399

B
Net
 537
 566
 689
 716
 843
 889
 950
1035
1219
1289
1386
NA

Ship
 638
 667
 798
 825
 959
1005
1070
1169
1362
1432
1533
NA

Net
 651
 679
 819
 844
 988
1033
1101
1155
1356
1425
1530
NA

C

Ship
 776
 804
 953
 978
1131
1176
1248
1314
1525
1594
1704
NA

Net
 674
 702
 855
 882
1035
1081
1156
1201
1411
1482
1592
NA

D

Ship
 805
 833
995
1022
1184
1230
1309
1366
1586
1657
1772
NA

Net
 788
 815
 984
1010
1181
1225
1307
1321
1548
1618
1736
NA

E

Ship
 943
 970
1149
1175
1356
1400
1487
1511
1749
1819
1942
NA

Net
NA
NA
 848
 898
1066
1110
1183
1209
1434
1503
1612
2040

Ship
941
 965
1137
 1162
1334
1378
1466
1486
1706
1775
1899
NA

Net
NA
NA
 832
 881
1037
1089
1161
1184
1390
1459
1568
1975

70
186
217
186
217
228
366
366
403

80
196
227
196
227
238
381
381
418

G

Ship
NA
NA
 988
1038
1215
1259
1336
1374
1609
1678
1792
2246

Net
NA
NA
 968
1023
1209
1252
1333
1329
1571
1638
1755
2192

Ship
NA
NA
 972
1021
1186
1238
1314
1349
1565
1634
1748
2181

Net
NA
NA
 956
1010
1188
1230
1311
1304
1527
1595
1712
2127

J

Ship
NA
NA
1133
1188
1384
1427
1513
1519
1772
1839
1961
2425

Net
 775
 801
 950
1000
1176
1220
1302
1311
1544
1613
1730
NA

Ship
NA
NA
1121
1175
1363
1405
1491
1494
1728
1796
1918
2360

Net
 774
 799
 938
 984
1146
1199
1280
1286
1500
1569
1687
NA

K

Ship
 930
 956
1115
1165
1351
1395
1482
1501
1745
1814
1936
NA

Net
 880
 905
1070
1125
1319
1362
1452
1439
1689
1756
1874
NA

Ship
 929
 954
1103
1149
1321
1374
1460
1476
1701
1770
1893
NA

Net
 879
 903
1063
1112
1298
1340
1430
1414
1645
1713
1838
NA

L

Outside
Ship Air Hood
1059
43
1084
43
1260
51
1315
51
1520
59
1563
59
1658
63
1654
51
1916
59
1983
59
2107
63
NA
63

L

Outside
Ship Air Hood
1058
43
1082
43
1253
51
1302
51
1499
59
1541
59
1636
63
1629
51
1872
59
1940
59
2071
63
NA
63

Note:
1. Weights do not include motors or coils.

Table W-2 — Power Vented Unit and Option Weight Data (Pounds)
A
B
Arrangement Net Ship
Net Ship
10
 197  216
 536  637
15
 221  240
 561  662
20
 268  289
 676  785
25
 293  314
 703  812
30
 340  362
 821  937
35
 365  387
 867  983
40
 401  433
 928 1048
50
 589  686 1010 1144
60
 684  788 1175 1318
70
 784  838 1246 1389
80
 806  914 1343 1490
12
1198 1333
NA
NA
Note:
1. Weights do not include motors or coils.

Table W-3 — Roof Curb Weights
Arrangement
B
C
D
E
G
J
K
L

10
115
150
115
150

15
115
150
115
150

192
310

192
310

20
133
168
133
168
179
210
210
338

25
133
168
133
168
179
210
210
338

Net
 650
 673
 806
 831
 966
1011
1079
1130
1312
1382
1487
NA

30
151
186
151
186
197
228
228
366

C

Ship
 775
 798
 940
 965
1109
1154
1226
1289
1481
1551
1661
NA

Net
 672
 697
 842
 869
1014
1060
1134
1175
1368
1438
1549
NA

35
151
186
151
186
197
228
228
366

40
161
196
161
196
207
238
238
381

D

Ship
 803
 828
982
1009
1163
1209
1287
1340
1543
1613
1729
NA

Net
 786
 810
 972
 997
1159
1203
1286
1296
1505
1574
1693
NA

50
168
197
168
197
210
338
338
375

60
186
217
186
217
228
366
366
403

E

Metric Conversion — 1 lb. = 0.453 kg

100

G

12

381
418

J

K

Weights

Table W-4 — Motor Weights
Voltage
115/60/1 ODP
208/60/1 ODP
230/60/1 ODP
208/60/3 ODP
230/60/3 ODP
460/60/3 ODP
575/60/3 ODP
115/60/1 TE
208/60/1 TE
230/60/1 TE
208/60/3 TE
230/60/3 TE
460/60/3 TE
575/60/3 TE
115/60/1 HEODP
208/60/1 HEODP
230/60/1 HEODP
208/60/3 HEODP
230/60/3 HEODP
460/60/3 HEODP
575/60/3 HEODP
115/60/1 HETE
208/60/1 HETE
230/60/1 HETE
208/60/3 HETE
230/60/3 HETE
460/60/3 HETE
575/60/3 HETE
208/60/3 2S1W
230/60/3 2S1W
460/60/3 2S1W
575/60/3 2S1W
115/60/1 2S2W
208/60/1 2S2W
230/60/1 2S2W
208/60/3 2S2W
230/60/3 2S2W
460/60/3 2S2W
575/60/3 2S2W

/2 HP
20
21
21
20
20
20
20
26
27
26
18
18
18
21
32
32
32
22
24
24
NA
28
NA
28
NA
32
32
NA
NA
NA
NA
NA
23
NA
23
27
26
26
NA

1

/4 HP
25
27
25
24
24
24
20
30
36
30
23
23
23
21
33
30
33
25
26
26
NA
37
NA
37
NA
52
52
NA
NA
NA
NA
NA
30
29
29
32
32
33
NA

3

1 HP
25
25
25
31
31
31
27
34
39
34
28
28
28
26
38
NA
38
40
40
40
41
38
NA
38
39
39
39
44
34
34
34
NA
37
36
36
44
44
40
NA

1 1/2 HP 2 HP
40
42
40
66
40
42
29
35
29
35
29
35
31
37
41
65
48
65
41
65
32
36
32
36
32
36
36
40
58
72
NA
NA
58
72
44
44
43
44
43
44
44
45
41
53
NA
NA
41
53
34
48
34
48
34
48
69
88
38
48
38
48
38
41
NA
NA
NA
NA
NA
NA
NA
NA
47
67
47
67
44
55
NA
NA

Notes:
1. ODP = Open Drip-proof
2. TE = Totally enclosed
3. HEODP = High Efficiency Open Drip-proof
4. HETE = High Efficiency Totally Enclosed
5. 2S1W = Two Speed One Winding
6. 2S2W = Two Speed Two Winding
7. NA = Not Available
FLA based on NEC Ratings

Table W-5 — Evaporative Cooler Weight
Unit Size
10, 15
20, 25, 50
30, 35, 60, 70
40, 80

Shipping Wt.
lb
137
166
192
206

Operating Wt.
lb
301
386
468
509

Metric Conversion — 1 lb. = 0.453 kg

101

3 HP
80
80
80
47
47
47
56
74
74
74
55
55
55
90
NA
NA
NA
83
80
80
90
NA
NA
NA
71
94
94
76
66
66
58
NA
NA
NA
NA
84
84
67
NA

5 HP
NA
NA
NA
 49
 49
 49
 73
NA
NA
NA
 65
 65
 65
 92
NA
NA
NA
 89
 91
 91
100
NA
NA
NA
 78
110
110
 80
 81
 81
 94
NA
NA
NA
NA
NA
NA
NA
NA

7 1/2 HP
NA
NA
NA
 99
 99
 99
105
NA
NA
NA
 90
 90
 90
161
NA
NA
NA
139
137
137
170
NA
NA
NA
107
158
158
132
125
125
125
NA
NA
NA
NA
221
221
214
NA

10 HP
NA
NA
NA
118
118
118
116
NA
NA
NA
123
123
123
199
NA
NA
NA
141
138
138
141
NA
NA
NA
124
166
166
140
143
143
136
NA
NA
NA
NA
192
192
230
NA

15 HP
NA
NA
NA
152
150
150
150
NA
NA
NA
295
295
295
284
NA
NA
NA
213
238
238
215
NA
NA
NA
225
294
294
260
NA
NA
218
NA
NA
NA
NA
NA
NA
NA
NA

Options

Single-Stage Room Thermostat
(Order No. 134-0207-01)
• Low Voltage (24V)
• 40 F to 90 F Range
• Fan Auto-On Switch
• System Heat-Off-Cool Switch

Two-Stage Room Thermostat
(Order No. 134-0207-04)
• Low Voltage (24V)
• 40 F to 90 F Range
• Fan Auto-On Switch
Off-Heat-Auto-Cool Switch
• System
• 5 5/8” W x 3 1/2” H x 2 1/8” D

Thermostats

Single-Stage Room Thermostat
with Summer/Winter Switch
(Order No. 134-0207-02)
• Low Voltage (24V)
• 55 to 95 F Range
Auto-On Switch
• Fan
• 3 1/2” W x 4 1/5” H x 1 3/8” D

T7300 Programmable Room
Thermostat
(Order No. 134-0207-05)
• Provides seven-day programmability
for two stages of heating and two
stages of cooling
• Heat-Off-Cool-Auto system switching
four time periods per day for occupied
and unoccupied modes with three-hour
override of unoccupied mode.
• Automatic heat-cool changeover and
battery backup.
• 8” W x 4” H x 1 5/8” D

Universal Guard
(Order No. 134-0207-07)
• Clear Plastic
• Ring Base
Keys
• Tumbler 7Lock and Two
• Cover: 69 /8” W x 51 5/8” H x33“ D
• Base: 6 /16” W x 5 /2” H x /8” D

Single-Stage Duct Thermostat
(Order No. 134-0207-03)
• Low Voltage (24V)
• 55 to 175 F Range
• 5’ Capillary
• 2” W x 5 5/8” H x 2 7/16” D

Two-Stage Duct Thermostat
(Order No. 134-0207-06)
• Low Voltage (24V)
• 55 to 175 F Range
• 5’ Capillary
• 2” W x 5 5/8” H x 2 7/16” D

102

Options

Remote Control Station
(Order No. 134-0201-01)
• Wall mounted
• Six LED status lamps
• System on/off, fan auto/on, heat auto/
off, cool auto/off, auxiliary on/off
switching and modulating damper
potentiometer mounting.
• Plug-in terminal block wiring and wall
mounting bracket.
• 6 1/4” W x 3 3/4” H x 1 1/2” D

Thermostats

Seven-Day Timeclock
(Order No. 134-0201-02)
• Single pole double throw (SPDT) relay
output at setpoint time
of six setpoints per day
• Maximum
• 7 3/4” H x 5” W x 3 7/16” D

24-Hour Timeclock
(Order No. 134-0201-03)
• Single pole double throw (SPDT) relay
output at setpoint time.
12 setpoints per day.
• Maximum
• 7 3/4” H x 5” W x 3 7/16” D

Controls

Electronic Modulating Room
Thermostat
(Included with Gas Control)
• Low voltage (24 V)
• 60-85 F range
• Natural gas only  
thermostat:
• Room
4 1/2” H x 2 1/2” W x 1 1/2” D
Room
Thermostat

Electronic Modulating Duct
Thermostat
(Included with Gas Control)
• Low voltage (24 V)
• 55-90 F range
• Sensor: 10-inch probe
temperature selector:
• Remote
4 1/4” W x 4 1/4” H x 1 7/8” D
thermostat:
• Duct
4 1/4” W x 4 1/4” H x 1 5/8” D
• Natural gas only

Electronic Modulating Duct
Thermostat with Room Override
• Line voltage (115 V) roomstat
F range
• 50-90
• 2 7/8” W x 4 9/16” H x 1 1/4” D
• Low voltage (24 V) Ductstat
• 55-90 F range
• Sensor: 10-inch probe
temperature selector:
• Remote
4 1/4” W x 4 1/4” H x 1 5/8” D
thermostat:
• Duct
4 1/4” W x 4 1/4” H x 1 5/8” D
• Natural gas only

103

Duct
Stat

Remote
Temperature
Selector

Duct
Stat

Remote
Temperature
Selector

Room
Override

Controls

Options

Electronic Modulating
4-20 mA or 0-10 VDC Input
• A200 signal conditioner
• Control replaces amplifier in duct or
room control package
 
 

Discharge Air Control with Outside
Air Reset
• Available in two, three and four-stage
control. Shown below is the discharge
air controller.

Roof Curbs
Roof Curbs
Roof curbs are available for all Trane
single, double and triple furnace
outdoor units. All curbs are shipped
knocked down for field assembly.

104

Curbs are normally available on a short
lead time basis so they may be on the
jobsite well in advance of the units.
Curbs are 12 inches high, factoring in
the four-inch unit base rail, overall
height to the bottom of the rooftop unit
is actually 16 inches. Roof curbs can be
supplied with one-inch fiberglass
insulation.

Features
Summary
Trane rooftop gas heating units have
the following design features:

• All units have AGA and CGA certified
duct furnaces.
• ETL and CSA UL-1995 certified
packaged units.
• All units fabricated from aluminized

steel. The heat exchanger uses 20gauge tubes and 18-gauge header
sections.
• Units are complete, wired, tested and
rail-mounted packages with blower
drives preset.
• Units are available with left hand or
right hand gas control configuration.
This flexibility helps to meet special
application requirements.
• Draw-thru coil cabinet arrangements
with stainless steel drain pan.
• Evaporative cooling arrangement with
standard 8 or optional 12-inch media
(203 or 305 mm).

105

Mechanical
Specifications

Rooftop
Duct Furnace

Venting System
Natural vent units shall be provided
with a vent cap designed for gravity
venting. Outside air for combustion
enters at the base of the vent cap
through a protective grille, and
products of combustion are discharged
through the upper section of the flue
vent cap.

Controls
Standard units shall be provided with
24-volt combination single-stage
automatic gas valves, including main
operating valve and pilot safety shutoff,
pressure regulator, manual main and
pilot shutoff valve, and adjustable pilot
valve. Gas valves shall be suitable for
NEC Class 2 use for a maximum inlet
gas pressure of 0.5 psi (14” WC) on
natural gas. All rooftop units shall be
provided with a low voltage circuit
breaker rated for 150 percent of the
units normal 24-volt operating load.

Arrangement A
GENERAL
Units shall be completely factory
assembled, piped, wired and test fired.
All duct furnaces shall be AGA and
CGA certified and conform with the
latest ANSI Standards for safe and
efficient performance. Units shall be
mounted on metal rails with lifting and
anchor holes and shall be suitable for
slab mounting. Units shall be available
for operation on either natural or LP
(propane) gas. The firing rate of each
furnace will not exceed 400 MBh and
shall contain its own heat exchanger,
flue collector, venting, burners, safety
and ignition controls. All furnaces shall
be in compliance with FM (Factory
Mutual) requirements.
ELECTRICAL
Standard control relays shall be socket
mounted with terminal block
connections. All control wiring shall
terminate at terminal strips (single
point connection) and include an
identifying marker corresponding to
the wiring diagram. Control wiring
shall be harnessed with terminal block
connections.
Casing
Casings shall be die-formed, 18-gauge
galvanized steel and finished in air-dry
enamel. Service and access panels
shall be provided through easily
removable side access panels with
captive fasteners.
Heat Exchanger
Standard heat exchanger construction
shall consist of 20-gauge aluminized
steel tubes and 18-gauge aluminized
steel headers. Standard drip pan
construction shall be corrosion
resistant aluminized steel.
Flue Collector
Standard flue collector construction
shall be corrosion resistant aluminized
steel.

Power vent units shall be provided with
a vent fan. Outside air for combustion
and products of combustion shall have
individual air inlet and discharge grilles
located in the upper section of the
furnace service panel. An air proving
switch shall be installed and disengage
gas flow if for any reason the drafter
has failed to operate. (Power venting
and 100 percent shutoff ignition
systems are required for compliance
with IRI (Industrial Risk Insurers).
Burners
Burners shall be die-formed, corrosion
resistant aluminized steel, with
stamped porting and stainless steel
port protectors. Port protectors prevent
foreign matter from obstructing the
burner ports. Burners are individually
removable for ease of inspection and
servicing. The entire burner assembly
is easily removed with its slide-out
drawer design. The pilot shall be
accessible through an access plate
without removing the burner drawer
assembly.
Electrical Cabinet
Electrical cabinet shall be isolated from
the air stream with a non-removable
access panel interior to the outer
service panel. There is provision in this
cabinet for component mounting, wire
routing and high voltage isolation.
Control wiring shall be harnessed with
terminal block connections.

106

Each duct furnace shall be provided
with a 24 V high temperature limit
switch and a (redundant) combination
gas valve.
All units provided with a solid state
ignition control system which ignites
the intermittent pilot by spark during
each cycle of operation. When pilot
flame is proven, main burner valve
opens to allow gas flow to the burners.
Pilot and burners are extinguished
during the off cycle.

Mechanical
Specifications
FACTORY INSTALLED OPTIONS
Control Options (Per Furnace)
Two-Stage Gas Valve
Provides two stages of heat. Ignition is
at low fire (one half of the unit’s full
rated input). Requires the use of an
optional two-stage thermostat.
Hydraulic Modulating Gas Valve
Provides modulated heat output.
Ignition is at low fire (one half of the
unit’s full rated input), and a discharge
air temperature sensing bulb located in
the air stream shall modulate the gas
input from 40 percent to 100 percent
rated input. Provided with an
automatic electric valve in series with
the hydraulic valve which cycles the
unit in response to an optional low
voltage single-stage thermostat.
Hydraulic Modulating Gas Valve with
Bypass
Provides modulated heat output.
Ignition is at low fire (one half of the
unit’s full rated input), and a discharge
temperature sensing bulb located in
the air stream shall modulate the gas
input from 40 percent to 100 percent
rated input. Provided with an
automatic electric valve in series with
the hydraulic valve which cycles the
unit. An additional electric valve in
parallel bypasses the hydraulic
modulating valve, overriding the
discharge temperature sensing bulb,
allowing full fire. Requires the use of an
optional thermostat to control the
electric valve.
Electronic Modulating — Room or
Duct Stat Control
Provides modulated heat output. An
automatic valve in series with the
modulating valve shall be provided to
cycle the unit. Ignition is at full fire (100
percent input), and modulates the gas
input from 100 percent to 40 percent
rated input. Available for use with a
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’s setpoint.

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.
When “furnace one only” is specified
on double and triple furnaces,
additional furnace sections will have
single-stage on-off control.
Discharge Air Control with Outside
Air Reset
Unit provided with factory-mounted
discharge air controller, discharge air
sensor, outdoor air reset, summer/
winter thermostat and velocity
pressure switch. The outdoor air reset
range is from 10 F to 60 F. Full reset
occurs at 10 F outside air temperature.
There is a straight line relationship
between outside air temperature and
reset. Therefore, at 60 F outside air
temperature, no reset will occur. The
amount of reset is adjustable from 20 F
to 50 F. Discharge air controller
provides two minute delay between
successive on and off stages. A
summer/winter thermostat locks out
heating when outside air temperature
is above 55 F. The velocity pressure
switch is provided for protection
against high temperatures at low
airflows.
Available in two-stage (half of the unit’s
full rated input), three-stage (33 percent
of the unit’s full rated input) and fourstage (25 percent of the unit’s full rated
input). Three and four-stage available
on double and triple furnace units only.
S-350 Modular Electronic Control
System
Basic system utilizes a controller
module with discharge air sensor,
setpoint and one stage output, a stage
module with differential setpoint and
one stage output and a display module
with LCD display for temperature
readout. The system stages the units
rate of fire based upon sensed
discharge air temperature, setpoint
setting and differential setting between
stages.
Provided as a two-stage (all furnaces),
three and four-stage (double and triple
furnaces only) and six-stage (triple
furnace only).

107

Heat Exchanger Options
Type 409 Stainless Steel (one or all
furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 409 stainless
steel. Burners and flue collector shall
be aluminized steel. 409 stainless steel
is recommended when outside air is
used for make-up air in areas where
outside temperatures are 40 F or
below.
Type 409 Stainless Steel Package
(one or all furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 409 stainless
steel. Burners and flue collector shall
be 409 stainless steel. 409 stainless
steel is recommended where outside
air is used for make-up air in areas
where outside temperatures are 40 F
or below.
Type 321 Stainless Steel (one or all
furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 321 stainless
steel. Burners and flue collector shall
be aluminized steel.
Type 321 Stainless Steel Package
(one or all furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 321 stainless
steel. Burners and flue collector shall
be 409 stainless steel.
Additional Factory Installed Options
Fan Time Delay
The fan time delay relay minimizes
cold blasts of air on start-up. It also
allows the fan to operate after burner
shutdown (120 second delay off),
removing the residual heat from the
heat exchanger.
Manual Blower Switch
Manual blower switch shall be factory
installed in the electrical cabinet.

Mechanical
Specifications
Firestat
If temperature reaches the setpoint, the
unit will close all gas valves, return the
dampers to their normal position and
shut down the blower. Manual reset.
Return Air Mounted (setpoint
typically 130 F)
Supply Air Mounted (setpoint
typically 150 F)
Orifices for Elevations over 2000 feet
409 Stainless Steel Furnace Drip Pan
Replaces the standard aluminized steel
furnace drip pan.
Airflow Proving Switch
High/Low Gas Pressure Limit
Switches
A high pressure and a low pressure
interlock switch and shutoff valve shall
be provided for each furnace section.
High/low gas pressure limits disengage
heating upon detecting either high line
pressure or low manifold pressure.
Status Indicator Lamps (Electrical
Cabinet)
Status indicator lamps shall include
power on, blower on and one lamp per
stage of heat mounted in the electrical
cabinet.

Field Installed Accessories
High Gas Line Pressure Regulator
Reduces main gas line pressure to a
minimum of 7 inches WC. Pressure at
the jobsite must be specified. The
regulator is selected to accommodate
that specific pressure.
Remote Control Station
Wall mounted. Provides six LED status
lamps with System On/Off, Fan Auto/
On, Heat Auto/Off, Cool Auto/Off,
Auxiliary On/Off switching and
Modulating damper potentiometer
mounting. Designed for easy
installation with plug-in terminal block
wiring and wall mounting bracket.
(Auxiliary On/Off may be used with the
Evaporative Cooler fill and drain kit.)
Seven-Day Timeclock
Provides single-pole double-throw
(SPDT) relay output at setpoint time
with maximum six setpoints per day.
24-Hour Timeclock
Provides single-pole double-throw
(SPDT) relay output at setting time with
maximum 12 setpoints per day.
Disconnect Switch
115V Convenience Outlet
GFI (Ground Fault Convenience Outlet)
is manual reset with weatherproof
enclosure. (Requires separate 115V
power source.)
Manual Reset High Limit Switch
The rooftop unit shall be provided with
a manual reset high limit switch wired
in series to the lead furnace high limit.
If the setpoint is reached, the gas valve
will close and the blower will continue
to run until the sensed temperature is
below the setpoint.

108

THERMOSTATS
Low voltage room thermostat, single
stage with fan auto-on-switch and
system heat off- cool switch.
Low voltage room thermostat, single
stage with fan auto-on switch.
Low voltage room thermostat, two
stage with fan auto-on switch and
system off-heat-auto-cool switch.
Low voltage programmable room
thermostat, two stage with LCD
display, fan auto-on switch and system
off-heat-auto-cool switch.
Universal tamperproof guard for all
room thermostats.
Low voltage duct thermostat, single
stage.
Low voltage duct thermostat, twostage.
Room thermostat, electronic
modulating control.
Duct thermostat, electronic
modulating control.
Duct thermostat, electronic
modulating control with override room
thermostat.

Mechanical
Specifications

Rooftop
Heating Unit

Venting System
Natural vent units shall be provided
with a vent cap designed for gravity
venting. Outside air for combustion
enters at the base of the vent cap
through a protective grille, and
products of combustion are discharged
through the upper section of the flue
vent cap.

bearing secured. An access interlock
switch shall be installed in the blower
compartment and will disengage the
blower upon removing the service
panel. An override shall be
incorporated into the interlock switch
for serviceability.

Arrangement B, C, D, E
GENERAL
Units shall be completely factory
assembled, piped, wired and test fired.
All units shall contain duct furnaces that
are AGA and CGA certified and
conform with the latest ANSI Standards
for safe and efficient performance.
Units shall be mounted on metal rails
with lifting and anchor holes and shall
be suitable for slab or curb mounting.
Units shall be available for operation on
either natural or LP (propane) gas.
The firing rate of each furnace will not
exceed 400 MBh and shall contain its
own heat exchanger, flue collector,
venting, burners, safety and ignition
controls. All units shall be ETL or UL
certified for electrical safety in
compliance with UL 1995 safety
standard for heating, ventilating and
cooling equipment. All units shall be in
compliance with FM (Factory Mutual)
requirements.
ELECTRICAL
Standard control relays shall be socket
mounted with terminal block
connections. All control wiring shall
terminate at terminal strips (single point
connection) and include an identifying
marker corresponding to the wiring
diagram. Motor and control wiring shall
be harnessed with terminal block
connections.
Casing
Casings shall be die-formed, 18-gauge
galvanized steel and finished in air-dry
enamel. Service and access panels shall
be provided through easily removable
side access panels with captive
fasteners. Fan sections and supply
plenums (when provided) shall be
insulated with fire resistant, odorless,
matte-faced one-inch glass fiber
material. Outside air hoods, when
provided, ship with a wire mesh inlet
screen.
Heat Exchanger
Standard heat exchanger construction
shall consist of 20-gauge aluminized
steel tubes and 18-gauge aluminized
steel headers. Standard drip pan
construction shall be corrosion resistant
aluminized steel.
Flue Collector
Standard flue collector construction
shall be corrosion resistant aluminized
steel.

Power vent units shall be provided with
a vent fan. Outside air for combustion
and products of combustion shall have
individual air inlet and discharge grilles
located in the upper section of the
furnace service panel. An air proving
switch shall be installed and disengage
gas flow if for any reason the draftor
has failed to operate. Power venting
and 100 percent shutoff ignition
systems are required for compliance
with IRI (Industrial Risk Insurers).
Burners
Burners shall be die-formed, corrosion
resistant aluminized steel, with
stamped porting and stainless steel
port protectors. Port protectors prevent
foreign matter from obstructing the
burner ports. Burners are individually
removable for ease of inspection and
servicing. The entire burner assembly is
easily removed with its slide-out
drawer design. The pilot shall be
accessible through an access plate
without removing the burner drawer
assembly.
Evaporative Cooler (Standard on
Arrangement D and E only)
An evaporative cooler with 8-inch
media shall be provided. The
evaporative cooler shall be of a self
cleaning design with a stainless steel
water tank, regulated water flow and
overflow protection. The cooler shall
have a cabinet assembly of heavygauge aluminized steel with
weatherproof finish, a UL recognized
thermally protected sealed recirculating
pump motor, two inch distribution pad,
and corrosion resistant PVC water
distribution tubes.
Fans
Centrifugal fan shall be belt driven,
forward curved with double inlet,
statically and dynamically balanced.
The blower wheel shall be fixed on a
keyed shaft, supported with rubber
grommet on bearing only, and ball

109

Filters
Filter rack shall be constructed of
galvanized steel with access through
the side service panel. Standard filters
are one-inch permanent washable type.
Electrical Cabinet
Electrical cabinet shall be isolated from
the air stream with a non-removable
access panel interior to the outer
service panel. There is provision in this
cabinet for component mounting, wire
routing and high voltage isolation.
Motor and control wiring shall be
harnessed with terminal block
connections.
Controls
Standard units shall be provided with
24-volt combination single-stage
automatic gas valves, including main
operating valve and pilot safety shutoff,
pressure regulator, manual main and
pilot shutoff valve, and adjustable pilot
valve. Gas valves shall be suitable for
NEC Class 2 use for a maximum inlet
gas pressure of 0.5 psi (14” WC) on
natural gas. All rooftop units shall be
provided with a low voltage circuit
breaker rated for 150 percent of the
units normal 24-volt operating load.
Each duct furnace shall be provided
with a 24-volt high temperature limit
switch, a (redundant) combination gas
valve and a fan time delay relay. The
fan time delay relay minimizes cold
blasts of air on start-up. It also allows
the fan to operate after burner
shutdown, removing residual heat
from the heat exchanger. All rooftop
furnace units shall contain a reverse
airflow interlock switch. The normally
closed switch, when activated, shall
cause gas valves to close and continue
blower operation. All units provided
with a solid-state ignition control
system which ignites the intermittent
pilot by spark during each cycle of
operation. When pilot flame is proven,
main burner valve opens to allow gas
flow to the burners. Pilot and burners
are extinguished during the off cycle.

Mechanical
Specifications
FACTORY INSTALLED OPTIONS
Control Options (Per Furnace)
Two-Stage Gas Valve
Provides two stages of heat. Ignition is
at low fire (one half of the unit’s full
rated input). Requires the use of an
optional two-stage thermostat.
Hydraulic Modulating Gas Valve
Provides modulated heat output.
Ignition is at low fire (one half of the
unit’s full rated input), and a discharge
air temperature sensing bulb located in
the air stream shall modulate the gas
input from 40 percent to 100 percent
rated input. Provided with an automatic
electric valve in series with the
hydraulic valve which cycles the unit in
response to an optional low voltage
single-stage thermostat.
Hydraulic Modulating Gas Valve with
Bypass
Provides modulated heat output.
Ignition is at low fire (one-half of the
unit’s full rated input), and a discharge
temperature sensing bulb located in
the air stream shall modulate the gas
input from 40 percent to 100 percent
rated input. Provided with an automatic
electric valve in series with the
hydraulic valve which cycles the unit.
An additional electric valve in parallel
bypasses the hydraulic modulating
valve, overriding the discharge
temperature sensing bulb, allowing full
fire. Requires the use of an optional
thermostat to control the electric valve.
Electronic Modulating — Room or
Duct Stat Control
Provides modulated heat output. An
automatic valve in series with the
modulating valve shall be provided to
cycle the unit. Ignition is at full fire (100
percent input), and modulates the gas
input from 100 percent to 40 percent
rated input. Available for use with a
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’s setpoint.

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.
When “furnace one only” is specified
on double and triple furnaces,
additional furnace sections will have
single-stage on-off control.
Discharge Air Control with Outside
Air Reset
Unit provided with factory-mounted
discharge air controller, discharge air
sensor, outdoor air reset, summer/
winter thermostat and velocity
pressure switch. The outdoor air reset
range is from 10 F to 60 F. Full reset
occurs at 10 F outside air temperature.
There is a straight line relationship
between outside air temperature and
reset. Therefore, at 60 F outside air
temperature, no reset will occur. The
amount of reset is adjustable from 20 F
to 50 F. Discharge air controller
provides two minute delay between
successive on and off stages. A
summer/winter thermostat locks out
heating when outside air temperature
is above 55 F. The velocity pressure
switch is provided for protection
against high temperatures at low
airflows.
Available in two-stage (half of the unit’s
full rated input), three-stage (33 percent
of the unit’s full rated input) and fourstage (25 percent of the unit’s full rated
input). Three and four-stage available
on double and triple furnace units only.
S-350 Modular Electronic Control
System
Basic system utilizes a controller
module with discharge air sensor,
setpoint and one stage output, a stage
module with differential setpoint and
one-stage output and a display module
with LCD display for temperature
readout. The system stages the units
rate of fire based upon sensed
discharge air temperature, setpoint
setting and differential setting between
stages.
Provided as a two-stage (all furnaces),
three and four-stage (double and triple
furnaces only) and six-stage (triple
furnace only).

110

Heat Exchanger Options
Type 409 Stainless Steel (one or all
furnaces) Heat exchanger tubes and
headers shall be 20-gauge type 409
stainless steel. Burners and flue
collector shall be aluminized steel. 409
stainless steel is recommended when
outside air is used for make-up air in
areas where outside temperatures are
40 F or below.
Type 409 Stainless Steel Package
(one or all furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 409 stainless
steel. Burners and flue collector shall be
409 stainless steel. 409 stainless steel is
recommended where outside air is
used for make-up air in areas where
outside temperatures are 40 F or below.
Type 321 Stainless Steel (one or all
furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 321 stainless
steel. Burners and flue collector shall be
aluminized steel.
Type 321 Stainless Steel Package
(one or all furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 321 stainless
steel. Burners and flue collector shall be
409 stainless steel.
Motors — General
All motors shall be ball bearing type
with resilient base mount. Windings are
Class “B”, 1800 rpm with service
factors of 1/2 - 3/4 hp = 1.25 and 1 - 5 hp
= 1.15.
Single-Speed Open Drip-proof
60 HZ/1800 RPM
Single-Phase (with contactor) —
Optional 115V, 208V and 230V motors
available in 1/2 - 2 hp models.
Three-Phase (with contactor) —
Optional 208V, 230V and 460V motors
available in 1/2 - 5 hp models.
Single-Phase (with magnetic starter) —
Optional 115V,208V and 230V motors
available in 1/2 - 3 hp models.
Three-Phase (with magnetic starter) —
Optional 208V,230V,460V and 575V
motors available in 1/2 - 5 hp models.

Mechanical
Specifications
Single-Speed TEFC
60 HZ/1800 RPM
Single-Phase (with contactor) —
Optional 115V, 208V and 230V motors
available in 1/2 - 1 1/2 hp models.

Three-Phase (with magnetic starter) —
Optional 208V and 230V motors
available in 1/2 - 5 hp models. Optional
460V motors available in 1/2 - 3 hp
models.

Single-Phase (with magnetic starter) —
Optional 115V, 208V and 230V motors
available in 1/2 - 3 hp models.

Manual Blower Switch
Manual blower switch shall be factory
installed in the electrical cabinet.

Three-Phase (with magnetic starter) —
Optional 208V,230V,460V and 575V
motors available in 1/2 - 5 hp models.

Damper Options
Dampers shall be of the opposed blade
type, constructed of galvanized steel
with neoprene nylon bushings, blades
to be mechanically interlocked.

Single Speed High Efficiency ODP
60 HZ/1800 RPM
Single-Phase (with contactor) —
Optional 115V and 230V motors
available in 1/2 - 1 hp models. Optional
208V motors available in 1/2 - 3/4 hp
models.
Single-Phase (with magnetic starter) —
Optional 115V and 230V motors
available in 1/2 - 2 hp models. Optional
208V motors available in 1/2 - 3/4 hp
models.
Three-Phase (with magnetic starter) —
Optional 208V,230V and 460V motors
available in 1/2 - 5 hp models. Optional
575V motors available in 1 - 5 hp
models.
Single-Speed High Efficiency TEFC
60 HZ/1800RPM
Single-Phase (with contactor) —
Optional 115V and 230V motors
available in 1/2 - 1 1/2 hp models.
Single-Phase (with magnetic starter) —
Optional 115V and 230V motors
available in 1/2 - 2 hp models.
Three-Phase (with magnetic starter) —
Optional 230V and 460V motors
available in 1/2 - 5 hp models. Optional
208V and 575V available in 1 - 5 hp
models.
Two-Speed/One Winding Motors
(THREE PHASE ONLY)
60 HZ/1800/900 RPM
Three Phase (with magnetic starter) —
Optional 208V, 230V and 460V motors
available in 1 - 5 hp models.
Two-Speed/Two Winding Motors
60 HZ/1800/1200 RPM
Single-Phase (with magnetic starter) —
Optional 115V and 230V motors
available in 1/2 - 1 hp models. Optional
208V motors available in 3/4 - 1 hp
models.

Optional low leak dampers shall be of
the opposed blade type, construction
of galvanized steel with neoprene
nylon bushings and vinyl blade edge
seals, blades to be mechanically
interlocked.
Outside Air or Return Air/ TwoPosition Motor/ Spring Return
Units with outside air or return air only
shall be provided with damper, two
position spring return damper motor
and controls. The motor shall power
the damper full open when the unit is
on and full closed when the unit is off.
OA/RA Two-Position Spring Return
Two position spring return motor with
interlocked outside and return air
dampers shall be provided. The motor
shall power either the outside air
damper full open and the return air
damper full closed or the outside air
damper full closed and the return air
damper full open in response to an
outside air temperature sensor
(includes an outside air thermostat that
makes on a rise in temperature and
drives the damper open). When the
unit is off, the motor will drive the
outside air damper full closed and the
return air damper full open.
OA/RA Modulating Motor W/Mixed
Air Control/Min. Pot/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller located in the
mixed air stream. Units shall also be
provided with a minimum position
potentiometer for minimum outside air
damper position.
The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is off.

111

OA/RA Modulating Motor W/Mixed
Air Control/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller located in the
mixed air stream.
The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is off.
OA/RA Modulating Motor W/Min
Pot/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall position the
outside and return air dampers in
response to a manually set
potentiometer.
The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is off.
OA/RA Modulating Motor W/Dry
Bulb/Mixed Air Control/Min Pot/Spring
Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller and dry bulb
thermostat located in the mixed air
stream. Units shall also be provided
with a minimum position
potentiometer for minimum outside air
damper position.
The spring return feature drives the
outside air damper full open and the
return air damper full closed when the
unit is off.
OA/RA Modulating Motor W/
Enthalpy Controlled Economizer/SR
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to an enthalpy controlled
economizer. When the unit is off the
motor will drive the outside air damper
full closed and the return air damper
full open.

Mechanical
Specifications
OA/RA Modulating Motor with
Space Pressure Controller
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to a pressure sensor located
in the building. Non-spring return.
OA/RA Modulating Motor W/S-350P
Proportional Mixed Air Control/SR
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to a solid-state mixed air
sensor and S-350 Proportional
controller. When the unit is off the
motor will drive the outside air damper
full closed and the return air damper
full open.
OA/RA Mtr. W/External 4-20 mA or 010VDC Analog Input/Spring Return
Modulating motor interlocked with
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a 4-10 mA
or 0-10VDC signal supplied by an
external DDC controller.
The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is shut down.
ASHRAE Cycle I - OA/RA 2 pos w/
warm-up stat/SR
Two position spring return motor with
interlocked outside and return air
dampers shall be provided. The motor
shall power the outside air damper full
open after a warm up period
determined by a minimum supply air
temperature sensor when the unit is
on, and full closed when the unit is off.

ASHRAE Cycle II - OA/RA Mod W/
Warm-up Stat/Mixed Air/Min Pot/
Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller located in the
mixed air stream after a warm up
period determined by a minimum
supply air temperature sensor. Units
shall also be provided with a minimum
position potentiometer for minimum
outside air damper position. When the
unit is off, the motor will drive the
outside air damper full closed and the
return air damper full open.
ASHRAE Cycle III - OA/RA Mod. W/
Warm-up Stat/Mixed Air/SR
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to a thermostatic controller
located in the mixed air stream after a
warm up period determined by a
minimum supply air temperature
sensor. Units shall also be provided
with a minimum position
potentiometer for minimum outside air
damper position. When the unit is off,
the motor will drive the outside air
damper full closed and the return air
damper full open.
Manual Dampers
Units with outside air and return air
shall be provided with manually set
outside and return air dampers.

Additional Factory Installation Options
Firestat
If temperature reaches the setpoint, the
unit will close all gas valves, return the
dampers to their normal position and
shut down the blower. Manual reset.
Return Air Mounted (setpoint
typically 130 F) Standard on
Arrangement B-E. Utilized on these
arrangements as a reverse airflow
switch.
Supply Air Mounted (setpoint
typically 150 F)
Freezestat
Rooftop unit shall be provided with a
freezestat (0-100 F) with the sensing
bulb located in the discharge air
stream. Wired as an interlock to
prevent cold air discharge.
Orifices for Elevations over 2000 feet
12” Evaporative Media
12” media shall be provided for the
evaporative cooler.
409 Stainless Steel Furnace Drip Pan
Replaces the standard aluminized steel
furnace drip pan.
Foil Face Insulation
Fan section and supply plenum (when
provided) shall be insulated with oneinch foil face insulation. Conforms with
ASHRAE Standard 62-1989.
Clogged Filter Switch
A clogged filter pressure switch with
adjustable operating range and
normally open switch shall be installed
to sense increased suction pressure by
the blower due to filter obstruction.
Provision for remote indication shall be
provided by terminal block connection
points. Includes a status lamp mounted
in the electrical cabinet.
Moisture Eliminators
Provided in place of an inlet screen on
the outside air hood. Includes a
pressure switch.
Horizontal Return
Unit shall be supplied with the return
air opening at or under the outside air
opening location depending on the Air
Inlet Configuration.

112

Mechanical
Specifications
Continuous Fan Relay — 24V Coil
DPDT 10A
Relay provided with 24 volt coil and
double pole double throw 10 amp
contacts. Plugs into the main
connection PC board in the electrical
cabinet. Included as standard on
Arrangement D and E . May also be
utilized as an exhaust fan interlock.
Interlock Relay — 24/115V Coil SPDT
10A
Relay has a selectable coil voltage of 24
or 115 volts and single pole double
throw 10 amp contacts with LED on
indicator lamp. Relay is utilized as an
auxiliary relay.
Interlock Relay — 24/115-230V Coil
DPDT 10A
Relay has a selectable coil voltage of
24, 115 or 230 volts and double pole
double throw 10 amp contacts. Utilized
as an auxiliary relay for general
purpose duty.
High/Low Gas Pressure Limit
Switches
A high pressure and a low pressure
interlock switch and shutoff valve shall
be provided for each furnace section.
High/low gas pressure limits disengage
heating upon detecting either high line
pressure or low manifold pressure.
Status Indicator Lamps (Electrical
Cabinet)
Status indicator lamps shall include
power on, blower on and one lamp per
stage of heat mounted in the electrical
cabinet.
Ambient Lockout
Airflow Proving Switch

Field Installed Accessories
High Gas Line Pressure Regulator
Reduces main gas line pressure to a
minimum of 7-inches WC. Pressure at
the jobsite must be specified. The
regulator is selected to accommodate
that specific pressure.
Manual Reset High Limit Switch
The rooftop unit shall be provided with
a manual reset high limit switch wired
in series to the lead furnace high limit.
If the setpoint is reached, the gas valve
will close and the blower will continue
to run until the sensed temperature is
below the setpoint.
Remote Control Station
Wall mounted. Provides six LED status
lamps with System On/Off, Fan Auto/
On, Heat Auto/Off, Cool Auto/Off,
Auxiliary On/Off switching and
Modulating damper potentiometer
mounting. Designed for easy
installation with plug-in terminal block
wiring and wall mounting bracket.
(Auxiliary On/Off may be used with the
Evaporative Cooler fill and drain kit.)
Seven-Day Timeclock
Provides single pole double throw
(SPDT) relay output at setpoint time
with maximum six setpoints per day.
24-Hour Timeclock
Provides single pole double throw
(SPDT) relay output at setting time
with maximum 12 setpoints per day.
Disconnect Switch
115 V Convenience Outlet
GFI (Ground Fault Convenience Outlet)
is manual reset with weatherproof
enclosure (requires separate 115V
power source)
Roof Mounting Curb
Roof curb shall be shipped
unassembled with hardware package
and gasket attached. Curb and rail
shall total 16-inches high and supplied
with a cross-member which allows the
isolation of the return and supply air
streams (when supplied). Roof curbs
can be supplied with one-inch
fiberglass insulation.

113

Evaporative Cooler Platform
Provides mounting support for
evaporative cooler only.
Fill and Drain Kit
Includes three-way valve and relay for
automatic fill and drain for the
evaporative coolers. Optional freezestat
provides automatic shutoff and drain
upon meeting outside air setpoint.
Optional Filters (One-inch permanent
standard)
Two-inch Permanent
Two-inch Throwaway
One-inch 30 percent Pleated Media
Two-inch 30 percent Pleated Media
THERMOSTATS
Low voltage room thermostat, single
stage with fan auto-on-switch and
system heat-off cool switch
Low voltage room thermostat, single
stage with fan auto-on switch
Low voltage room thermostat, twostage with fan auto-on switch and
system off-heat-auto-cool switch
Low voltage programmable room
thermostat, two-stage with LCD
display, fan auto-on switch and system
off-heat-auto-cool switch.
Universal tamperproof guard for all
room thermostats
Low voltage duct thermostat, singlestage
Low voltage duct thermostat, twostage
Room thermostat, electronic
modulating control
Duct thermostat, electronic
modulating control
Duct thermostat, electronic
modulating control with override room
thermostat

Mechanical
Specifications

Rooftop
Heating Unit

Venting System
Natural vent units shall be provided
with a vent cap designed for gravity
venting. Outside air for combustion
enters at the base of the vent cap
through a protective grille, and
products of combustion are discharged
through the upper section of the flue
vent cap.

Filters
Filter rack shall be of v-bank design for
minimal pressure drop and be
constructed of galvanized steel with
access through the side service panel.
Standard filters are one-inch
permanent washable type.

Arrangement G, J, K, L
GENERAL
Units shall be completely factory
assembled, piped, wired and test fired.
All units shall contain duct furnaces
that are AGA and CGA certified and
conform with the latest ANSI
Standards for safe and efficient
performance. Units shall be mounted
on metal rails with lifting and anchor
holes and shall be suitable for slab or
curb mounting. Units shall be available
for operation on either natural or LP
(propane) gas.
The firing rate of each furnace will not
exceed 400 MBh and shall contain its
own heat exchanger, flue collector,
venting, burners, safety and ignition
controls. All units shall be ETL or UL
certified for electrical safety in
compliance with UL 1995 safety
standard for heating, ventilating and
cooling equipment. All units shall be in
compliance with FM (Factory Mutual)
requirements.
ELECTRICAL
Standard control relays shall be socket
mounted with terminal block
connections. All control wiring shall
terminate at terminal strips (single
point connection) and include an
identifying marker corresponding to
the wiring diagram. Motor and control
wiring shall be harnessed with terminal
block connections.
Casing
Casings shall be die-formed, 18-gauge
galvanized steel and finished in air-dry
enamel. Service and access panels
shall be provided through easily
removable side access panels with
captive fasteners. Fan sections and
supply plenums (when provided) shall
be insulated with fire resistant,
odorless, matte-faced one-inch glass
fiber material. Outside air hoods, when
provided, ship with a wire mesh inlet
screen.
Heat Exchanger
Standard heat exchanger construction
shall consist of 20-gauge aluminized
steel tubes and 18-gauge aluminized
steel headers. Standard drip pan
construction shall be corrosion
resistant aluminized steel.
Flue Collector
Standard flue collector construction
shall be corrosion resistant aluminized
steel.

Power vent units shall be provided with
a vent fan. Outside air for combustion
and products of combustion shall have
individual air inlet and discharge grilles
located in the upper section of the
furnace service panel. An air proving
switch shall be installed and disengage
gas flow if for any reason the draftor
has failed to operate. Power venting
and 100 percent shutoff ignition
systems are required for compliance
with IRI (Industrial Risk Insurers).
Burners
Burners shall be die-formed, corrosion
resistant aluminized steel, with
stamped porting and stainless steel
port protectors. Port protectors prevent
foreign matter from obstructing the
burner ports. Burners are individually
removable for ease of inspection and
servicing. The entire burner assembly
is easily removed with its slide-out
drawer design. The pilot shall be
accessible through an access plate
without removing the burner drawer
assembly.
Coil Section (Standard on
Arrangement K and L only)
A coil section, constructed of
galvanized steel, shall be provided with
the unit. This section shall be insulated
with fire resistant, odorless, mattefaced one-inch glass fiber material.
Fans
Centrifugal fan shall be belt driven,
forward curved with double inlet,
statically and dynamically balanced.
The blower wheel shall be fixed on a
keyed shaft, supported with rubber
grommet on bearing only and ball
bearing secured. 7 1/2 through 15 hp
motors do not have the rubber
grommets and are equipped with a
pillow block bearing assembly on the
drive side. An access interlock switch
shall be installed in the blower
compartment and will disengage the
blower upon removing the service
panel. An override shall be
incorporated into the access interlock
switch for serviceability.
114

Electrical Cabinet
Electrical cabinet shall be isolated from
the air stream with a non-removable
access panel interior to the outer
service panel. There is provision in this
cabinet for component mounting, wire
routing and high voltage isolation.
Motor and control wiring shall be
harnessed with terminal block
connections.
Controls
Standard units shall be provided with
24-volt combination single-stage
automatic gas valves, including main
operating valve and pilot safety
shutoff, pressure regulator, manual
main and pilot shutoff valve, and
adjustable pilot valve. Gas valves shall
be suitable for NEC Class 2 use for a
maximum inlet gas pressure of 0.5 psi
(14” WC) on natural gas. All rooftop
units shall be provided with a low
voltage circuit breaker rated for 150
percent of the units normal 24-volt
operating load.
Each duct furnace shall be provided
with a 24-volt high temperature limit
switch, a (redundant) combination gas
valve and a fan time delay relay. The
fan time delay relay minimizes cold
blasts of air on start-up. It also allows
the fan to operate after burner
shutdown, removing residual heat
from the heat exchanger. All rooftop
furnace units shall contain a reverse
airflow interlock switch. The normally
closed switch, when activated, shall
cause gas valves to close and continue
blower operation. All units provided
with a solid state ignition control
system which ignites the intermittent
pilot by spark during each cycle of
operation. When pilot flame is proven,
main burner valve opens to allow gas
flow to the burners. Pilot and burners
are extinguished during the off cycle.

Mechanical
Specifications
FACTORY INSTALLED OPTIONS
Control Options (Per Furnace)
Two-Stage Gas Valve
Provides two stages of heat. Ignition is
at low fire (one half of the unit’s full
rated input). Requires the use of an
optional two-stage thermostat.
Hydraulic Modulating Gas Valve
Provides modulated heat output.
Ignition is at low fire (one-half of the
unit’s full rated input), and a discharge
air temperature sensing bulb located in
the air stream shall modulate the gas
input from 40 percent to 100 percent
rated input. Provided with an automatic
electric valve in series with the
hydraulic valve which cycles the unit in
response to an optional low voltage
single-stage thermostat.
Hydraulic Modulating Gas Valve with
Bypass
Provides modulated heat output.
Ignition is at low fire (one-half of the
unit’s full rated input), and a discharge
temperature sensing bulb located in
the air stream shall modulate the gas
input from 40 percent to 100 percent
rated input. Provided with an automatic
electric valve in series with the
hydraulic valve which cycles the unit.
An additional electric valve in parallel
bypasses the hydraulic modulating
valve, overriding the discharge
temperature sensing bulb, allowing full
fire. Requires the use of an optional
thermostat to control the electric valve.
Electronic Modulating — Room or
Duct Stat Control
Provides modulated heat output. An
automatic valve in series with the
modulating valve shall be provided to
cycle the unit. Ignition is at full fire (100
percent input), and modulates the gas
input from 100 percent to 40 percent
rated input. Available for use with a
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’s setpoint.

Electronic Modulating — 4-20 mA/ 010 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.
When “furnace one only” is specified
on double and triple furnaces,
additional furnace sections will have
single-stage on-off control.
VAV Control
Unit provided with factory-mounted
discharge air controller, discharge air
sensor, outdoor air reset, summer/
winter thermostat and velocity
pressure switch. The outdoor air reset
range is from 10 F to 60 F. Full reset
occurs at 10 F outside air temperature.
There is a straight line relationship
between outside air temperature and
reset. Therefore, at 60 F outside air
temperature, no reset will occur. The
amount of reset is adjustable from 20 F
to 50 F. Discharge air controller
provides two-minute delay between
successive on and off stages. A
summer/winter thermostat locks out
heating when outside air temperature
is above 55 F. The velocity pressure
switch is provided for protection
against high temperatures at low
airflows.
Available in two-stage (half of the unit’s
full rated input), three-stage (33 percent
of the unit’s full rated input) and fourstage (25 percent of the unit’s full rated
input). Three and four-stage available
on double and triple furnace units only.
S-350 Modular Electronic Control
System
Basic system utilizes a controller
module with discharge air sensor,
setpoint and one-stage output, a stage
module with differential setpoint and
one-stage output and a display module
with LCD display for temperature
readout. The system stages the units
rate of fire based upon sensed
discharge air temperature, setpoint
setting and differential setting between
stages.
Provided as a two-stage (all furnaces),
three and four-stage (double and triple
furnaces only) and six-stage (triple
furnace only).

115

Heat Exchanger Options
Type 409 Stainless Steel (one or all
furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 409 stainless
steel. Burners and flue collector shall
be aluminized steel. 409 stainless steel
is recommended when outside air is
used for make-up air in areas where
outside temperatures are 40 F or
below.
Type 409 Stainless Steel Package
(one or all furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 409 stainless
steel. Burners and flue collector shall
be 409 stainless steel. 409 stainless
steel is recommended where outside
air is used for make-up air in areas
where outside temperatures are 40 F or
below.
Type 321 Stainless Steel (one or all
furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 321 stainless
steel. Burners and flue collector shall
be aluminized steel.
Type 321 Stainless Steel Package
(one or all furnaces)
Heat exchanger tubes and headers
shall be 20-gauge type 321 stainless
steel. Burners and flue collector shall
be 409 stainless steel.

Mechanical
Specifications
Motors — General
All motors shall be ball bearing type
with resilient base mount and NEMA
frame sizes from 48 to 256T. Windings
are Class “B”, 1800 rpm with service
factors of 1/2 - 3/4 hp = 1.25 and 1 - 15 hp
= 1.15.
Single-Speed Open Drip-proof
60 HZ/1800 RPM
Single-Phase (with contactor) —
Optional 115V, 208V and 230V motors
available in 1/2 - 2 hp models.
Three-Phase (with contactor) —
Optional 208V, 230V and 460V motors
available in 1/2 - 5 hp models.
Single-Phase (with magnetic starter) —
Optional 115V, 208V and 230V motors
available in 1/2 - 3 hp models.
Three-Phase (with magnetic starter) —
Optional 208V, 230V, 460V and 575V
motors available in 1/2-15 hp models.
Single-Speed TEFC
60HZ/1800 RPM
Single-Phase (with contactor) —
Optional 115V, 208V and 230V motors
available in 1/2 - 1 1/2 hp models.
Single-Phase (with magnetic starter) —
Optional 115V, 208V and 230V motors
available in 1/2 - 3 hp models.
Three-Phase (with magnetic starter) —
Optional 208V, 230V, 460V and 575V
motors available in 1/2 - 15 hp models.
Single-Speed High Efficiency ODP
60 HZ/1800 RPM
Single-Phase (with contactor) —
Optional 115V and 230V motors
available in 1/2 - 1 hp models. Optional
208V motors available in 1/2 - 3/4 hp
models.
Single-Phase (with magnetic starter) —
Optional 115V and 230V motors
available in 1/2 - 2 hp models. Optional
208V motors available in 1/2 - 3/4 hp
models.
Three-Phase (with magnetic starter) —
Optional 208V,230V and 460V motors
available in 1/2 - 15 hp models. Optional
575V motors available in 1 - 15 hp
models.
Single-Speed High Efficiency TEFC
60 HZ/1800RPM
Single-Phase (with contactor) —
Optional 115V and 230V motors
available in 1/2 - 1 1/2 hp models.

Single-Phase (with magnetic starter) —
Optional 115V and 230V motors
available in 1/2 - 2 hp models.
Three-Phase (with magnetic starter) —
Optional 230V and 460V motors
available in 1/2 - 15 hp models. Optional
208V and 575V available in 1 - 15 hp
models.
Two-Speed/One Winding Motors
(Three-Phase Only)
60 HZ/1800/900 RPM
Three-Phase (with magnetic starter) —
Optional 208V, 230V and 460V motors
available in 1 - 15 hp models.
Two-Speed/Two Winding Motors
60 HZ/1800/1200 RPM
Single-Phase (with magnetic starter) —
Optional 115V and 230V motors
available in 1/2 - 1 hp models. Optional
208V motors available in 3/4 - 1 hp
models.
Three-Phase (with magnetic starter) —
Optional 208V and 230V motors
available in 1/2 - 15 hp models. Optional
460V motors available in 1/2 - 3 hp and 7
1
/2 - 10 hp models. Optional 575V
motors available in 7 1/2 - 10 hp models.
Manual Blower Switch
Manual blower switch shall be factory
installed in the electrical cabinet.
DX or Chilled Water Cooling Coils
A direct expansion (DX) or chilled
water coil certified by ARI shall be
provided with the unit.
Damper Options
Dampers shall be of the opposed blade
type, constructed of galvanized steel
with neoprene nylon bushings, blades
to be mechanically interlocked.
Optional low leak dampers shall be of
the opposed blade type, construction
of galvanized steel with neoprene
nylon bushings and vinyl blade edge
seals, blades to be mechanically
interlocked.
Outside Air or Return Air/ TwoPosition Motor/ SR — Units with
outside air or return air only shall be
provided with damper, two-position
spring return damper motor and
controls. The motor shall power the
damper full open when the unit is on
and full closed when the unit is off.

116

OA/RA Two-Position SR
Two position spring return motor with
interlocked outside and return air
dampers shall be provided. The motor
shall power either the outside air
damper full open and the return air
damper full closed or the outside air
damper full closed and the return air
damper full open in response to an
outside air temperature sensor
(Includes an outside air thermostat that
makes on a rise in temperature and
drives the damper open). When the
unit is off, the motor will drive the
outside air damper full closed and the
return air damper full open.
OA/RA Mod Mtr. W/Mixed Air
Control/Min. Pot/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller located in the
mixed air stream. Units shall also be
provided with a minimum position
potentiometer for minimum outside air
damper position.
The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is off.
OA/RA Mod Mtr. W/Mixed Air
Control/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller located in the
mixed air stream.
The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is off.
OA/RA Mod Mtr W/Min Pot/Spring
Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall position the
outside and return air dampers in
response to a manually set
potentiometer.
The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is off.

Mechanical
Specifications
OA/RA Mod Mtr W/Dry Bulb/Mixed
Air Control/Min Pot/Spring Return
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller and dry bulb
thermostat located in the mixed air
stream. Units shall also be provided
with a minimum position
potentiometer for minimum outside air
damper position.
The spring return feature drives the
outside air damper full open and the
return air damper full closed when the
unit is off.
OA/RA Mod Mtr W/Enthalpy
Controlled Economizer/SR
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to an enthalpy controlled
economizer. When the unit is off the
motor will drive the outside air damper
full closed and the return air damper
full open.
OA/RA Mod Mtr W/ Space Pressure
Controller
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to a pressure sensor located
in the building. Non-spring return.
OA/RA Mod Mtr W/S-350P
Proportional Mixed Air Control/SR
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to a solid-state mixed air
sensor and S-350 proportional
controller. When the unit is off the
motor will drive the outside air damper
full closed and the return air damper
full open.
OA/RA Mtr. W/External 4-20 mA or 010VDC Analog Input/Spring Return
Modulating motor interlocked with
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a 4-10 mA
or 0-10VDC signal supplied by an
external DDC controller.

The spring return feature drives the
outside air damper full closed and the
return air damper full open when the
unit is shut down.
ASHRAE Cycle I (OA/RA TwoPosition w/warm-up stat/SR)
Two-position spring return motor with
interlocked outside and return air
dampers shall be provided. The motor
shall power the outside air damper full
open after a warm up period
determined by a minimum supply air
temperature sensor when the unit is
on, and full closed when the unit is off.
ASHRAE Cycle II (OA/RA Mod W/
Warm-up Stat/Mixed Air/Min Pot/
Spring Return)
Modulating motor with interlocked
outside and return air dampers shall be
provided. The motor shall modulate
the position of the outside and return
air dampers in response to a
thermostatic controller located in the
mixed air stream after a warm-up
period determined by a minimum
supply air temperature sensor. Units
shall also be provided with a minimum
position potentiometer for minimum
outside air damper position. When the
unit is off, the motor will drive the
outside air damper full closed and the
return air damper full open.
ASHRAE Cycle III (OA/RA Mod. W/
Warm-up Stat/Mixed Air/SR
Modulating motor with spring return
and interlocked outside and return air
dampers shall be provided. The motor
shall modulate the position of the
outside and return air dampers in
response to a thermostatic controller
located in the mixed air stream after a
warm-up period determined by a
minimum supply air temperature
sensor. Units shall also be provided
with a minimum position
potentiometer for minimum outside air
damper position. When the unit is off,
the motor will drive the outside air
damper full closed and the return air
damper full open.
Manual Dampers
Units with outside air and return air
shall be provided with manually set
outside and return air dampers.

117

Additional Factory Installed
Options
Firestat
If temperature reaches the setpoint, the
unit will close all gas valves, return the
dampers to their normal position and
shut down the blower. Manual reset.
Return Air Mounted (setpoint
typically 130 F) Standard on
Arrangement G-L. Utilized on these
arrangements as a reverse airflow
switch.
Supply Air Mounted (setpoint
typically 150 F)
Freezestat
Rooftop unit shall be provided with a
freezestat (0-100 F) with the sensing
bulb located in the discharge air
stream. Wired as an interlock to
prevent cold air discharge.
Orifices for Elevations over 2000 feet
409 Stainless Steel Furnace Drip Pan
Replaces the standard aluminized steel
furnace drip pan.
Foil Face Insulation
Fan section and supply plenum (when
provided) shall be insulated with oneinch foil face insulation. Conforms with
ASHRAE Standard 62-1989.
Clogged Filter Switch
A clogged filter pressure switch with
adjustable operating range and
normally open switch shall be installed
to sense increased suction pressure by
the blower due to filter obstruction.
Provision for remote indication shall be
provided by terminal block connection
points. Includes a status lamp mounted
in the electrical cabinet.
Moisture Eliminators
Provided in place of an inlet screen on
the outside air hood. Includes a
pressure switch.
Horizontal Return
Unit shall be supplied with the return
air opening at or under the outside air
opening location depending on the Air
Inlet Configuration.
Continuous Fan Relay — 24V Coil
DPDT 10A
Relay provided with 24-volt coil and
double pole double throw 10 amp
contacts. Plugs into the main
connection PC board in the electrical
cabinet. May also be utilized as an
exhaust fan interlock.

Mechanical
Specifications
Interlock Relay — 24/115V Coil SPDT
10A
Relay has a selectable coil voltage of 24
or 115-volts and single pole double
throw 10 amp contacts with LED on
indicator lamp. Relay is utilized as an
auxiliary relay.
Interlock Relay — 24/115-230V Coil
DPDT 10A
Relay has a selectable coil voltage of
24, 115 or 230-volts and double pole
double throw 10 amp contacts. Utilized
as an auxiliary relay for general
purpose duty.
High/Low Gas Pressure Limit
Switches
A high pressure and a low pressure
interlock switch and shutoff valve shall
be provided for each furnace section.
High/low gas pressure limits disengage
heating upon detecting either high line
pressure or low manifold pressure.
Status Indicator Lamps (Electrical
Cabinet)
Status indicator lamps shall include
power on, blower on and one lamp per
stage of heat mounted in the electrical
cabinet.
Ambient Lockout
Airflow Proving Switch
Field Installed Accessories
Manual Reset High Limit Switch
The rooftop unit shall be provided with
a manual reset high limit switch wired
in series to the lead furnace high limit.
If the setpoint is reached, the gas valve
will close and the blower will continue
to run until the sensed temperature is
below the setpoint.

24-Hour Timeclock
Provides single pole double throw
(SPDT) relay output at setting time with
maximum 12 setpoints per day.
Disconnect Switch
115V Convenience Outlet
GFI (Ground Fault Convenience Outlet)
is manual reset with weatherproof
enclosure (requires separate 115V
power source).
Roof Mounting Curb
Roof curb shall be shipped
unassembled with hardware package
and gasket attached. Curb and rail shall
total 16-inches high and supplied with
a cross-member which allows the
isolation of the return and supply air
streams (when supplied).
Roof curb can be supplied with oneinch fiberglass insulation.
Optional Filters (One-inch permanent
standard)
Two-inch permanent
Two-inch Throwaway
One-inch 30 percent Pleated Media
Two-inch 30 percent Pleated Media
THERMOSTATS
Low voltage room thermostat,
single-stage with fan auto-on-switch
and system heat-off cool switch
Low voltage room thermostat,
single-stage with fan auto-on switch
Low voltage room thermostat, twostage with fan auto-on switch and
system off-heat-auto-cool switch

High Gas Line Pressure Regulator
Reduces main gas line pressure to a
minimum of 7-nches WC. Pressure at
the jobsite must be specified. The
regulator is selected to accommodate
that specific pressure.

Low voltage programmable room
thermostat, two stage with LCD display,
fan auto-on switch and system off-heatauto-cool switch.

Remote Control Station
Wall mounted. Provides six LED status
lamps with System On/Off, Fan Auto/
On, Heat Auto/Off, Cool Auto/Off,
Auxiliary On/Off switching and
Modulating damper potentiometer
mounting. Designed for easy
installation with plug-in terminal block
wiring and wall mounting bracket.
(Auxiliary On/Off may be used with the
Evaporative Cooler fill and drain kit.)

Low voltage duct thermostat, singlestage

Seven-Day Timeclock
Provides single pole double throw
(SPDT) relay output at setpoint time
with maximum six setpoints per day.

Universal tamperproof guard for all
room thermostats

Low voltage duct thermostat, twostage
Room thermostat, electronic
modulating control
Duct thermostat, electronic
modulating control
Duct thermostat, electronic
modulating control with override room
thermostat

118

Evaporative Cooler
General
An evaporative cooler with 8-inch
media shall be provided. The
evaporative cooler shall be of a selfcleaning design with a stainless steel
water tank, regulated water flow and
overflow protection. The cooler shall
have a cabinet assembly of heavygauge aluminized steel with
weatherproof finish, a UL recognized,
thermally protected sealed recirculating
pump motor, two-inch distribution pad,
and corrosion resistant PVC water
distribution tubes.
Factory Installed Options
12” Evaporative Media
12” media shall be provided for the
evaporative cooler.
Field Installed Accessories
Evaporative Cooler Platform
Provides mounting support for
evaporative cooler only
Fill and Drain Kit
Includes three-way valve and relay and
automatic fill and drain for the
evaporative cooler.
Freezestat
Freezestat provides automatic shutoff
and drain upon meeting outside air
setpoint.

North American Commercial Group
The Trane Company
3600 Pammel Creek Road
La Crosse, WI 54601-7599
www.trane.com
An American Standard Company
Since The Trane Company has a policy of continuous
product improvement, it reserves the right to change
design and specification without notice.

Library
Product Section
Product
Model
Literature Type
Sequence
Date
File No.
Supersedes
Ordering No.

Product Literature
Air Handling
Make-Up Air
000
Data Sales Catalog
5
January 1998
PL-AH-MUA-000-DS-5-198
MUA-DS-5 595
MUA-DS-5



---

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Abstract                        :  ' If current, this catalog is/will be available on Talon.'    Contains features and benefits, unit configurations, model number description, general data, application consideration, selection procedure, performance data, electrical data, controls, dimensional data, weights, options, features summary, and mechanical specifications.
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