Trane Outdoor Gas Heating Units and Duct Furnaces Catalogue

MUA-DS-5

MUA-DS-5 January 1998

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 capabilities. These rooftops are available with inputs from 100,000 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).

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.

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

/2-15 hp motor

Btu/h

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

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

©American Standard Inc. 1998

Power Venting

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



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

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

Features and Benefits 2

Unit Configurations 4

Model Number Description 7

General Data 9

Application Considerations 11

Selection Procedure 20

Performance Adjustment Factors

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 Standard Features Arrangement A - Natural or LP (Propane Gas)

Rooftop Duct Furnace - Single Stage 24-Volt Gas Valve

Arrangement B Same as Arrangement A with: Rooftop Heating Unit With Standard Blower - Insulated Blower/Filter/Damper Cabinet

- 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

- 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 Same as Arrangement B with: Rooftop Heating Unit with Standard Blower - Insulated Supply Plenum and Downflow Supply Plenum

See page 6 for Legend.

Unit Configurations 

Unit Type Standard Features Arrangement D Same as Arrangement B with:

Rooftop Heating Unit with Standard Blower - Evaporative Cooler and 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, Same as Arrangement D with: Evaporative Cooler and Downflow Supply Plenum - Downflow Supply Plenum

Arrangement G - Natural or LP (Propane Gas) Rooftop Heating Unit with High Cfm Blower - 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 Same as Arrangement G with: Rooftop Heating Unit with High Cfm Blower - Insulated Supply Plenum and Downflow Supply Plenum

See page 6 for Legend.

Unit Configurations

Unit Type Standard Features Arrangement K Same as Arrangement G with:

Rooftop Heating Unit with High Cfm Blower - Coil Section and Coil Cabinet - Mounting for 4 to 6 Row Coils

- Stainless Steel Drain Pan with

Arrangement L Same as Arrangement K with: Rooftop Heating Unit with High Cfm Blower, - Insulated Supply Plenum Coil Cabinet and Downflow Supply Plenum

/4 Tapped Outlets

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 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 +

12345,6789101112131415161718192021

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

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) A=1/2 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

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 m

/S). A two-speed motor may be utilized for non-cooling airflow up to 14,000 CFM

(6.6 m

/S).

Furnace Type A,B Capacity 10-40 Capacity 10-40 Capacity 20-40 Capacity 10-40

∆T20 - 60F 10 - 1,200-3,500 CFM,

Rooftop Arrangements B,C Rooftop Arrangements D,E Rooftop Arrangements G, J Rooftop Arrangements K,L*

/2 - 5 HP 10 -1,200-3,500 CFM, 1/2 - 5 HP 20 -2,500-7,400 CFM, 3/4 - 10 HP 10 -1,200-3,000 CFM, 1/2 - 5 HP 15 - 2,000-4,500 CFM, 20 - 2,500-5,500 CFM, 25 - 3,000-5,500 CFM, 30 - 3,700-7,000 CFM, 35 - 4,500-8,500 CFM,

/2 - 5 HP 15 - 2,000-4,500 CFM, 1/2 - 5 HP 25 - 3,100-7,500 CFM, 3/4 - 10 HP 15 - 2,000-3,000 CFM, 1/2 - 5 HP

/2 - 5 HP 20 - 2,500-5,500 CFM, 1/2 - 5 HP 30 - 3,700-11,00 CFM, 1/2 - 15 HP 20 - 2,500-4,400 CFM, 3/4 - 10 HP

/4 - 5 HP 25 - 3,000-5,500 CFM, 3/4 - 5 HP 35 - 4,500-13,000 CFM, 3/4 - 15 HP 25 - 3,100-4,400 CFM, 3/4 - 10 HP

/4 - 5 HP 30 - 3,700-7,000 CFM, 3/4 - 5 HP 40 - 5,000-14,000 CFM, 1 - 15 HP 30 - 3,700-5,700 CFM, 1/2 - 15 HP

/4 - 5 HP 35 - 4,500-8,500 CFM, 3/4 - 5 HP 35 - 4,500-5,700 CFM, 3/4 - 15 HP 40 - 5,000-8,500 CFM, 1 - 5 HP 40 - 5,000-8,500 CFM, 1 - 5 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

Standard Blower Standard Blower w/Evap. High CFM Blower High CFM Blower w/Cooling

Furnace Type C,D Capacity 10-40 Capacity 10-40 NA Capacity 20-40

∆T60 - 90F 10 - 800-1,200 CFM,

15 - 12,000-1,800 CFM, 20 - 1,600-2,400 CFM, 25 - 2,000-3,000 CFM, 30 - 2,400-3,600 CFM, 35 - 2,800-4,200 CFM, 40 - 3,200-4,800 CFM,

/2 - 1 1/2 HP 10 - 800-1,200 CFM, 1/2 - 1 1/2 HP 20 - 1,600-2,400 CFM, 1/2 - 2 HP

/2 - 2 HP 15 - 12,000-1,800 CFM, 1/2 - 2 HP 25 - 2,000-3,000 CFM, 1/2 - 2 HP

/2 - 2 HP 20 - 1,600-2,400 CFM, 1/2 - 2 HP 30 - 2,400-3,600 CFM, 1/2 - 5 HP

/2 - 3 HP 25 - 2,000-3,000 CFM, 1/2 - 3 HP 35 - 3,000-4,200 CFM, 1/2 - 5 HP

/2 - 5 HP 30 - 2,400-3,600 CFM, 1/2 - 5 HP 40 - 3,300-5,000 CFM, 1/2 - 5 HP

/2 - 5 HP 35 - 2,800-4,200 CFM, 1/2 - 5 HP

/2 - 5 HP 40 - 3,200-4,800 CFM, 1/2 - 5 HP

ESP .1 - 2 in. WC ESP .1 - 2 in. WC ESP .1 - 2 in. WC

Furnace Type A,B Capacity 50-80 Capacity 50-80 Capacity 50-80 Capacity 50-80

∆T40 - 120F 50 - 3,000-3,500 CFM, 1 - 5 HP 50 - 3,000-3,500 CFM, 1 - 5 HP 50 - 3,100-7,500 CFM, 1 - 10 HP 50 - 3,000-4,400 CFM, 1 - 10 HP

60 - 3,700-6,500 CFM, 1 - 5 HP 60 - 3,700-6,500 CFM, 1 - 5 HP 60 - 3,700-11,000 CFM, 70 - 4,500-8,000 CFM, 1 - 5 HP 70 - 4,500-8,000 CFM, 1 - 5 HP 70 - 4,500-13,000 CFM, 1 - 15 HP 70 - 4,500-5,700 CFM, 1 - 15 HP

/4 - 15 HP 60 - 3,700-5,700 CFM, 3/4 - 15 HP

80 - 5,000-8,000 CFM, 1 - 5 HP 80 - 5,000-8,000 CFM, 1 - 5 HP 80 - 5,000-13,500 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

Furnace Type A,B NA NA Capacity 12 NA

∆T60 - 180F 12 - 5,500-13,000 CFM, 1

/2 - 15 HP

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.

Intake Hood

Damper/Filters

(High CFM)

Evaporative Cooler

(Standard)

Coil Cabinet

(High CFM)

Dampers/Filters/Blower/Main

Blower/Main Electrical

(High CFM) 0-15 HP

Electrical

(Standard) 0-5 HP

Furnace One

Furnace Two

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

Furnace Three

Furnace Type A-B

Arrangement G-J Only

Supply Plenum

General Data 

Table G-1  Filter Data

Rooftop Unit Size

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

B-E (4)16 x 20 (4)20 x 20 (4)16 x 20 (6)20 x 20

G-L (8)16 x 20 (8)20 x 20 (8)16 x 20 (12)20 x 20

Table G-2  Metric Conversion Table

Unless otherwise specified, the following conversions may be used for calculating SI unit measurements: 1 cubic foot= 0.028 m 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

1 inch water column = 0.029 kPa

(2)20 x 20

(4)20 x 20

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.

To Zone

DUCT

No. 1

FURN

Air

Handling

Unit

DUCT FURN

To Zone No. 2

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

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).

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.

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.

Application Considerations

18

(457 mm)

Duct Furnace Duct Furnace

AIR FLOW

*Refer to Outdoor Duct Furnace Manual for specific clearances.

18

(457 mm)

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 - (T

room

- T

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.

O.A.

Blower

Electrical Cabinet

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.

Supply Plenum

18

(457 mm)

General System Types

Single-Zone Staged Systems

100%

50%

Application Considerations

Supply Fan

Gas Fired Furnace

Stages of Fire

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

100%

85% 67% 50% 33% 17%

Stages of Fire

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

Return Air

T = Thermostat F = Fan Switch I = Ignition System

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

Supply Fan

Return Air

T = Temperature Sensor F = Fan Switch I = Ignition System E = Electronic Control

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,

Supply Air

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.

Gas Fired Furnace

Supply Air

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 500 Ohms 500 Ohms 1000 Ohms 1000 Ohms 333.3 Ohms

Controller

Direct

Controller

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

1000 Ohms 1000 Ohms 333.3 Ohms 333.3 Ohms

Series

Controller

Series/Parallel

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

333.3 Ohms

Controller

Series/Parallel

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

Application Considerations

Multizone Staged Systems

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.

Return Air

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

Supply Fan

Zone A

Two Zone System

Gas Fired Furnace

Supply Air

Zone B

100%

Damper Percent Open

50%

Interlocked Outside and Return Air Dampers

Outside Air Damper

Return Air Damper

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.

Outside Air

T = Temperature Sensor D = Damper Actuator

Outside and Return Air Damper Arrangement

Return Air

Supply Air

Make-Up Air Systems

Application Considerations

Outside Air

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

Return Air

Supply Fan

Supply Air

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 - (T

ROOM

- T

O.A.

)).

Exhaust Fan

Exhaust Air

Inside Air

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.



Direct Digital Control (DDC) Systems

Application Considerations

Outside Air Sensor

Damper Actuator

Personal Computer

Cooling

Supply Fan

Mixed Air Sensor

Communication Via Modem

Heating

Discharge Air Sensor

Room Sensor

Digital Control Panel

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.

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 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

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.

All units require AGA certification or UL listed controls. Our units are AGA certified and meet this requirement.

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.

FM Requirements

All units must be AGA certified or UL listed. Our units are AGA certified.

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

For LP (propane) gas, the minimum inlet pressure is 11 (2.9 kPa) and the maximum inlet pressure is 14.0 inches WC (3.5 kPa).

/2 inches W.C (1.6 kPa).

/2 inches WC

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) (

3.5-inch WC (0.9 kPa) on the leaving side of the valve. The valve typically drops about 1 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.

/2 psi) down to

/2-inch so the

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)

Selection Procedure

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

Selection Procedure

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

Selection Procedure

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

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.

Selection Procedure

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

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.

Using Figure SP-1, choose the geographical zone in which the unit is to be installed.

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.).

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.

Using Table SP-1, determine the required air changes per minute based on zone selection and the type of heat load.

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 Ft

Exterior Load Type: Normal Interior Load Type: Normal Location: Dallas, Texas  Zone 3 Air Changes Per Minute:

/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 1 2 3 4 High Load/High Gain 3/4 11 1/3 2 High Load/Normal Gain 1/2 3/4 11 1/3 Normal Load/High Gain 1/2 3/4 11 1/3 Normal Load/Normal Gain 1/2 1/2 3/4 1

Zone

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.

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.

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

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.

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:

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

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

Table SP-2  Enthalpy of Saturated Air at

Wet BTU Wet BTU Bulb per Bulb Per Temp. Pound Temp. Pound 50 20.38 65 30.05

50.5 20.64 65.5 30.44 51 20.90 66 30.83

51.5 21.17 66.5 31.23 52 21.45 67 31.63

52.5 21.73 67.5 32.03 53 22.01 68 32.44

53.5 22.29 68.5 32.86 54 22.59 69 33.27

54.5 22.88 69.5 33.70 55 23.18 70 34.12

55.5 23.48 70.5 34.55 56 23.79 71 34.99

56.5 24.10 71.5 35.42 57 24.42 72 35.87

57.5 24.74 72.5 36.31 58 25.06 73 36.77

58.5 25.39 73.5 37.22 59 25.73 74 37.68

59.5 26.06 74.5 38.15 60 26.40 75 38.61

60.5 26.75 75.5 39.09 61 27.10 76 39.56

61.5 27.45 76.5 40.04 62 27.81 77 40.53

62.5 28.17 77.5 41.02 63 28.54 78 41.51

63.5 28.91 78.5 42.01 64 29.29 79 42.51

64.5 29.67 79.5 43.02

Various Wet Bulb Temperatures

Performance Adjustment Factors

Table PAF-1  Correction Factors for Altitude

Temp. Barometric Pressure (In. Hg)

 70 1.00 1.02 1.04 1.06 1.08 1.10 1.12 1.14 1.16 1.18 1.20 1.22 1.25  80 1.02 1.04 1.06 1.08 1.10 1.12 1.14 1.16 1.18 1.20 1.22 1.25 1.27

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

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000

F 39.92 29.38 28.86 28.33 27.82 27.31 26.82 26.32 25.84 25.36 24.9 24.43 29.98

-40 0.79 0.81 0.82 0.84 0.85 0.87 0.88 0.90 0.92 0.93 0.95 0.97 0.99 0 0.87 0.88 0.90 0.92 0.93 0.95 0.97 0.99 1.00 1.02 1.04 1.06 1.08

40 0.94 0.96 0.98 1.00 1.01 1.03 1.05 1.07 1.09 1.11 1.13 1.16 1.18

100 1.06 1.08 1.10 1.12 1.14 1.16 1.18 1.20 1.22 1.25 1.27 1.29 1.32 120 1.90 1.11 1.13 1.16 1.18 1.20 1.22 1.24 1.27 1.29 1.31 1.34 1.37

Altitude (Feet)

Performance Data

Table PD-1  Rooftop Gas Duct Furnace Performance Data  Arrangement A

Capacity 10-12 Rating Rating Deg. F CFM in. of Water Nat. Gas L.P. Gas

Furnace Type A,B/C,D BTU/Hr BTU/Hr Eff. (Deg. C) (cu. m/s) (cu. m/s) (kPa) (kPa) Inlet Inlet

Rooftop Arrangement A (kW) (kW) % Min. Max. Min. Max. Min. Max. in. in.

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.

10 A/B 100,000 80,000 80 20 60 1,235 3,704 0.15 1.10 1/2 1/2

15 A/B 150,000 120,000 80 20 60 1,852 5,556 0.15 1.00

20 A/B 200,000 160,000 80 20 60 2,469 7,407 0.15 1.05

25 A/B 250,000 200,000 80 20 60 3,086 9,259 0.15 1.08

30 A/B 300,000 240,000 80 20 60 3,704 11,111 0.15 1.10

35 A/B 350,000 280,000 80 20 60 4,321 12,963 0.15 1.11

40 A/B 400,000 320,000 80 20 60 4,938 14,815 0.15 1.12

50 A/B 500,000 400,000 80 40 120 3,086 9,269 0.30 2.16 3/4 1/2 OR 3/4

60 A/B 600,000 480,000 80 40 120 3,704 11,111 0.30 2.20

70 A/B 700,000 560,000 80 40 120 4,321 12,963 0.30 2.22

80 A/B 800,000 640,000 80 40 120 4,938 14,815 0.30 2.24

12 A/B 1,200,000 960,000 80 60 180 4,938 14,815 0.45 3.36

10 C/D 100,000 79,000 79 30 90 823 2,469 0.10 0.88 1/2 1/2

15 C/D 150,000 118,500 79 30 90 1,219 3,657 0.10 0.78

20 C/D 200,000 158,000 79 30 90 1,626 4,876 0.10 0.81

25 C/D 250,000 197,500 79 30 90 2,032 6,096 0.10 0.85

30 C/D 300,000 237,000 79 30 90 2,438 7,315 0.10 0.86

35 C/D 350,000 276,500 79 30 90 2,845 8,534 0.10 0.87

40 C/D 400,000 316,000 79 30 90 3,251 9,753 0.10 0.88

Input Output Temp. Rise Pressure Drop

(29.3) (23.4) (11) (33) (0.583) (1.748) (0.04) (0.27)

(43.9) (35.1) (11) (33) (0.874) (2.622) (0.04) (0.25)

(58.6) (46.9) (11) (33) (1.165) (3.496) (0.04) (0.26)

(73.2) (58.6) (11) (33) (1.457) (4.370) (0.04) (0.27)

(87.8) (70.3) (11) (33) (1.748) (5.244) (0.04) (0.27)

(102.5) (82.0) (11) (33) (2.040) (6.119) (0.04) (0.28)

(117.1) (93.7) (11) (33) (2.331) (6.993) (0.04) (0.28)

(146.4) (117.1) (22) (67) (1.457) (4.375) (0.07) (0.54)

(175.7) (140.6) (22) (67) (1.748) (5.244) (0.07) (0.55)

(205.0) (164.0) (22) (67) (2.040) (6.119) (0.07) (0.55)

(234.3) (187.4) (22) (67) (2.331) (6.993) (0.07) (0.56)

(351.4) (281.1) (33) (100) (2.331) (6.993) (0.11) (0.84)

(29.3) (23.1) (17) (50) (0.388) (1.165) (0.02) (0.22)

(43.9) (34.7) (17) (50) (0.575) (1.726) (0.02) (0.19)

(58.6) (46.3) (17) (50) (0.767) (2.301) (0.02) (0.20)

(73.2) (57.8) (17) (50) (0.959) (2.877) (0.02) (0.21)

(87.8) (69.4) (17) (50) (1.151) (3.453) (0.02) (0.21)

(102.5) (81.0) (17) (50) (1.343) (4.028) (0.02) (0.22)

(117.1) (92.5) (17) (50) (1.534) (4.603) (0.02) (0.22)

/2 1/2

/4 1/2 OR 3/4

/2 1/2

/4 1/2 OR 3/4

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

Performance Data

Chart PD-2  Duct Furnace Performance Furnace Type  (C, D)

Standard Temperature Rise Duct Furnace Performance

Furnace Type  (A, B)

20-60 F Rise/Furnace

80% Efficiency

High Temperature Rise Duct Furnace Performance

Furnace Type  (C, D)

60-90 F Rise/Furnace

79% Efficiency

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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 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 800 100,000 79,000 550 .09 710 .15 840 .22 950 .29 1045 .37 1135 .45 1210 .53 1285 .61 1355 .69 1420 .78

10-C,D 73 1,000 605 .14 745 .21 870 .29 980 .37 1080 .46 1165 .55 1245 .64 1320 .74 1390 .83 1455 .93

15-C,D 78 1,400 630 .23 745 .31 855 .39 960 .49 1055 .59 1150 .70 1235 .81 1315 .93 1385 1.05 1460 1.17

20-C,D 73 2,000 560 .31 665 .41 755 .50 845 .60 925 .71 1000 .83 1075 .95 1140 1.07 1205 1.20 1265 1.34

25-C,D 73 2,500 625 .51 715 .63 795 .74 875 .86 945 .98 1015 1.10 1085 1.23 1150 1.37 1210 1.51 1270 1.66

30-C,D 73 3,000 665 .54 775 .72 875 .90 975 1.09 1070 1.30 1160 1.53 1245 1.76 1325 2.00 1395 2.25 1470 2.50

35-C,D 75 3,400 535 .46 645 .62 745 .79 840 .98 920 1.19 1000 1.40 1070 1.63 1140 1.88 1210 2.14 1275 2.41

40-C,D 73 4,000 570 .64 670 .82 760 1.01 845 1.22 930 1.43 1005 1.66 1075 1.90 1145 2.15 1205 2.42 1265 2.69

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.

81 900 575 .11 730 .18 855 .25 965 .33 1065 .41 1150 .50 1230 .58 1305 .67 1375 .76 1440 .86

66 1,100 635 .17 770 .25 890 .33 995 .42 1095 .51 1180 .61 1260 .71 1335 .81 1410 .91 1475 1.01 61 1,200 670 .21 795 .29 910 .38 1015 .47 1110 .57 1195 .67 1280 .77 1355 .88 1425 .99 1490 1.10 91 1,200 150,000 118,500 580 .16 705 .23 830 .31 940 .40 1045 .50 1135 .60 1220 .70 1300 .80 1375 .91 1445 1.02

68 1,600 685 .31 795 .40 890 .50 985 .60 1075 .70 1160 .82 1245 .94 1325 1.07 1400 1.19 1470 1.33 61 1,800 740 .42 845 .52 935 .62 1020 .73 1100 .84 1180 .96 1260 1.09 1340 1.22 1410 1.36 1480 1.50 91 1,600 200,000 158,000 500 .19 615 .26 720 .35 815 .44 900 .54 980 .64 1055 .76 1130 .88 1200 1.00 1270 1.13 81 1,800 530 .24 640 .33 735 .42 830 .51 915 .62 990 .73 1060 .84 1130 .96 1200 1.09 1265 1.23

66 2,200 595 .40 695 .50 780 .60 860 .71 940 .82 1015 .94 1085 1.07 1150 1.19 1215 1.33 1270 1.47 61 2,400 635 .49 725 .60 805 .71 885 .83 955 .95 1030 1.07 1095 1.20 1160 1.34 1225 1.48 1285 1.62 91 2,000 250,000 197,500 540 .30 645 .39 740 .48 825 .58 910 .69 985 .80 1060 .92 1125 1.05 1190 1.18 1250 1.31 81 2,250 580 .39 680 .50 765 .60 850 .71 925 .82 1000 .94 1070 1.07 1140 1.20 1200 1.33 1260 1.47

66 2,750 665 .66 750 .78 830 .90 905 1.03 970 1.16 1035 1.29 1100 1.43 1160 1.57 1225 1.72 1280 1.87 61 3,000 710 .83 790 .96 865 1.10 935 1.23 1000 1.37 1065 1.51 1125 1.66 1180 1.81 1240 1.96 1295 2.12 91 2,400 300,000 237,000 585 .33 710 .47 835 .63 945 .81 1045 1.00 1140 1.20 1225 1.41 1305 1.62 1375 1.83 1445 2.05 81 2,700 625 .43 740 .58 850 .75 960 .94 1055 1.14 1150 1.36 1235 1.58 1315 1.80 1390 2.04 1460 2.27

66 3,300 705 .69 815 .87 905 1.07 1000 1.27 1085 1.49 1175 1.72 1255 1.97 1335 2.22 1405 2.48 1475 2.75 61 3,600 750 .86 850 1.05 940 1.26 1025 1.47 1110 1.70 1190 1.94 1270 2.20 1345 2.46 1415 2.74 1485 3.02 91 2,800 350,000 276,500 485 .30 610 .44 720 .60 815 .77 905 .96 990 1.17 1070 1.40 1145 1.63 1215 1.87 1280 2.12 82 3,100 510 .37 625 .52 730 .69 825 .87 910 1.07 990 1.28 1070 1.51 1140 1.75 1210 2.00 1280 2.26

69 3,700 560 .56 665 .73 760 .91 850 1.11 935 1.32 1010 1.55 1080 1.78 1145 2.03 1210 2.29 1275 2.57 64 4,000 590 .67 690 .86 780 1.05 865 1.26 945 1.48 1020 1.71 1090 1.95 1155 2.20 1220 2.47 1280 2.75 61 4,200 605 .76 705 .95 790 1.15 875 1.36 950 1.59 1025 1.82 1095 2.07 1160 2.33 1225 2.60 1285 2.88 91 3,200 400,000 316,000 500 .38 620 .53 725 .70 820 .88 905 1.08 985 1.29 1060 1.52 1130 1.76 1205 2.01 1270 2.28 81 3,600 535 .50 645 .66 740 .84 830 1.04 915 1.24 995 1.46 1065 1.69 1135 1.94 1200 2.20 1265 2.47

66 4,400 605 .80 700 1.01 785 1.21 865 1.43 945 1.66 1020 1.90 1090 2.15 1155 2.41 1215 2.68 1275 2.96 61 4,800 640 1.00 730 1.22 815 1.44 890 1.67 960 1.91 1035 2.16 1100 2.42 1165 2.69 1230 2.97 1285 3.26

Performance Data

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

Rainhood Filters Supply Evaporative Return or Outside

Capacity CFM Screen Mstr.Elim. 2 1 2 1 2 Plenum 8 12 Damper

10 1,200 .02 .02 .05 <.01 <.01 .05 .03 .04 .03 .04 .03

15 2,000 .05 .07 .09 .02 .03 .12 .07 .07 .08 .12 .09

20 2,400 .03 .05 .09 .02 .02 .11 .06 .05 .04 .06 .05

25 3,000 .05 .07 .12 .03 .04 .16 .09 .05 .06 .10 .08

30 3,600 .04 .06 .10 .02 .03 .14 .08 .05 .06 .09 .07

800 <.01 .01 .03 <.01 <.01 .03 .01 .02 .01 .02 .01 900 .01 .01 .03 <.01 <.01 .03 .02 .02 .02 .02 .02

1,100 .02 .02 .04 <.01 <.01 .04 .02 .03 .02 .04 .03

1,500 .03 .04 .06 .01 .02 .07 .04 .06 .04 .07 .05 2,000 .05 .07 .09 .02 .03 .12 .07 .10 .08 .12 .09 2,500 .08 .11 .12 .03 .04 .17 .10 .15 .12 .18 .13 3,000 .11 .15 .16 .04 .06 .23 .14 .22 .17 .26 .19 3,500 .16 .21 .19 .06 .08 .30 .18 .29 .24 .35 .25 1,200 .02 .02 .05 <.01 <.01 .05 .03 .03 .03 .04 .03 1,400 .03 .03 .06 <.01 .01 .06 .03 .03 .04 .06 .04 1,600 .03 .04 .07 .01 .02 .08 .04 .04 .05 .07 .06 1,800 .04 .05 .08 .02 .02 .10 .05 .06 .06 .09 .07

2,500 .08 .11 .12 .03 .04 .17 .10 .11 .12 .18 .13 3,000 .11 .15 .16 .04 .06 .23 .14 .15 .17 .26 .19 3,500 .16 .21 .19 .06 .08 .30 .18 .21 .24 .35 .25 4,000 .20 .27 .07 .11 .38 .23 .27 N/A N/A .33 4,500 .26 .34 .09 .14 .34 N/A N/A .42 1,600 .02 .02 .05 <.01 .01 .06 .03 .02 .02 .03 .03 1,800 .02 .03 .06 <.01 .01 .07 .04 .03 .02 .03 .03 2,000 .02 .03 .07 .01 .02 .08 .04 .03 .03 .04 .04 2,200 .03 .04 .08 .01 .02 .09 .05 .04 .03 .05 .05

2,500 .04 .05 .09 .02 .03 .12 .07 .05 .04 .07 .06 3,000 .05 .07 .12 .03 .04 .16 .09 .07 .06 .10 .08 4,000 .09 .13 .17 .05 .07 .26 .16 .13 .11 .17 .15 5,000 .15 .20 .07 .11 .38 .23 .21 .18 .27 .23 5,500 .18 .25 .09 .13 .44 .28 .25 .22 .32 .28 2,000 .02 .03 .07 .01 .02 .08 .04 .02 .03 .04 .04 2,250 .03 .04 .08 .02 .02 .10 .05 .03 .04 .05 .05 2,500 .04 .05 .09 .02 .03 .12 .07 .04 .04 .07 .06 2,750 .04 .06 .10 .02 .03 .14 .08 .04 .05 .08 .07

4,000 .09 .13 .17 .05 .07 .26 .16 .09 .11 .17 .15 4,500 .12 .16 .06 .09 .31 .19 .12 .15 .22 .19 5,000 .15 .20 .07 .11 .38 .23 .14 .18 .27 .23 5,500 .18 .25 .09 .13 .44 .28 .17 .22 .32 .28 2,400 .02 .03 .06 .01 .01 .07 .04 .02 .03 .04 .03 2,700 .02 .03 .07 .01 .02 .09 .05 .03 .03 .05 .04 3,000 .03 .04 .08 .02 .02 .10 .06 .03 .04 .06 .05 3,300 .04 .05 .09 .02 .03 .12 .07 .04 .05 .07 .06

4,000 .05 .08 .12 .03 .04 .17 .10 .06 .07 .11 .08 5,000 .09 .12 .16 .04 .06 .24 .14 .09 .11 .17 .13 6,000 .12 .17 .06 .09 .33 .20 .13 .16 .24 .19 6,500 .14 .20 .07 .11 .38 .23 .16 .19 .29 .22 7,000 .17 .23 .09 .13 .43 .27 .18 .22 .33 .25

With Throwaway Washable Pleated Air Media Air

Pressure Loss (Inches of Water)

+ 90 hidden pages

Trane Outdoor Gas Heating Units and Duct Furnaces Catalogue

Features and Benefits

Contents

Model Number Description

General Data

Application Considerations

Selection Procedure

Performance Adjustment Factors

Performance Data