Trane Gas Unit Heaters Installation And Maintenance Manual GLND SVX01B EN 03/16/2012 Installation, Operation, Heater Indoor Fired Duct Furnace S GL

2015-04-02

: Trane Trane-Gas-Unit-Heaters-Installation-And-Maintenance-Manual-684285 trane-gas-unit-heaters-installation-and-maintenance-manual-684285 trane pdf

Open the PDF directly: View PDF .
Page Count: 43

SAFETY WARNING

Only qualified personnel should install and service the equipment. The installation, starting up, and

servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific

knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could

result in death or serious injury. When working on the equipment, observe all precautions in the literature

and on the tags, stickers, and labels that are attached to the equipment.

Gas Unit Heater

Indoor Gas-Fired Duct Furnace

March 2012 GLND-SVX01B-EN

Installation, Operation,

and Maintenance

Warnings, Cautions and Notices

Warnings, Cautions and Notices. Note that warnings,

cautions and notices appear at appropriate intervals

throughout this manual. Warnings are provide to alert

installing contractors to potential hazards that could result

in death or personal injury. Cautions are designed to alert

personnel to hazardous situations that could result in

personal injury, while notices indicate a situation that

could result in equipment or property-damage-only

accidents.

Your personal safety and the proper operation of this

machine depend upon the strict observance of these

precautions.

Read this manual thoroughly before operating or servicing

this unit.

Important

Environmental Concerns!

Scientific research has shown that certain man-made

chemicals can affect the earth’s naturally occurring

stratospheric ozone layer when released to the

atmosphere. In particular, several of the identified

chemicals that may affect the ozone layer are refrigerants

that contain Chlorine, Fluorine and Carbon (CFCs) and

those containing Hydrogen, Chlorine, Fluorine and

Carbon (HCFCs). Not all refrigerants containing these

compounds have the same potential impact to the

environment. Trane advocates the responsible handling of

all refrigerants-including industry replacements for CFCs

such as HCFCs and HFCs.

Responsible Refrigerant Practices!

Trane believes that responsible refrigerant practices are

important to the environment, our customers, and the air

conditioning industry. All technicians who handle

refrigerants must be certified. The Federal Clean Air Act

(Section 608) sets forth the requirements for handling,

reclaiming, recovering and recycling of certain

refrigerants and the equipment that is used in these

service procedures. In addition, some states or

municipalities may have additional requirements that

must also be adhered to for responsible management of

refrigerants. Know the applicable laws and follow them.

ATTENTION: READ THIS MANUAL AND ALL LABELS

ATTACHED TO THE UNIT CAREFULLY BEFORE

ATTEMPTING TO INSTALL, OPERATE OR SERVICE THESE

UNITS! CHECK UNIT DATA PLATE FOR TYPE OF GAS AND

ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN THAT

THESE AGREE WITH THOSE AT POINT OF INSTALLATION.

RECORD THE UNIT MODEL AND SERIAL No.(s) IN THE

SPACE PROVIDED. RETAIN FOR FUTURE REFERENCE.

ATTE NT ION : Warnings, Cautions and Notices appear at

appropriate sections throughout this literature. Read

these carefully:

WARNING Indicates a potentially hazardous

situation which, if not avoided, could

result in death or serious injury.

CAUTIONsIndicates a potentially hazardous

situation which, if not avoided, could

result in minor or moderate injury. It

could also be used to alert against

unsafe practices.

NOTICE: Indicates a situation that could result in

equipment or property-damage only

WARNING

Proper Field Wiring and Grounding

Required!

All field wiring MUST be performed by qualified

personnel. Improperly installed and grounded field

wiring poses FIRE and ELECTROCUTION hazards. To

avoid these hazards, you MUST follow requirements for

field wiring installation and grounding as described in

NEC and your local/state electrical codes. Failure to

follow code could result in death or serious injury.

WARNING

Personal Protective Equipment (PPE)

Required!

Installing/servicing this unit could result in exposure to

electrical, mechanical and chemical hazards.

• Before installing/servicing this unit, technicians

MUST put on all Personal Protective Equipment (PPE)

recommended for the work being undertaken.

ALWAYS refer to appropriate MSDS sheets and OSHA

guidelines for proper PPE.

• When working with or around hazardous chemicals,

ALWAYS refer to the appropriate MSDS sheets and

OSHA guidelines for information on allowable

personal exposure levels, proper respiratory

protection and handling recommendations.

• If there is a risk of arc or flash, technicians MUST put

on all Personal Protective Equipment (PPE) in

accordance with NFPA 70E or other country-specific

requirements for arc flash protection, PRIOR to

servicing the unit.

Failure to follow recommendations could result in death

or serious injury.

Warnings, Cautions and Notices

GLND-SVX01B-EN 3

Trademarks

Trane and the Trane logo are trademarks of Trane in the

United States and other countries. All trademarks

referenced in this document are the trademarks of their

respective owners.

Dow Corning is a registered trademark of Dow Corning

Corporation.

WARNING

Hazardous Service Procedures!

The maintenance and troubleshooting procedures

recommended in this manual could result in exposure

to electrical, mechanical or other potential safety

hazards. Always refer to the safety warnings provided

throughout this manual concerning these procedures.

When possible, disconnect all electrical power

including remote disconnect and discharge all energy

storing devices such as capacitors before servicing.

Follow proper lockout/tagout procedures to ensure the

power can not be inadvertently energized. When

necessary to work with live electrical components,

have a qualified licensed electrician or other individual

who has been trained in handling live electrical

components perform these tasks. Failure to follow all of

the recommended safety warnings provided, could

result in death or serious injury.

WARNING

Overheating or Flooding Could Cause Fire

or Explosion!

Overheating or flooding (where any part of the duct

furnace has been under water) could result in fire or

explosion. Should overheating occur, or the gas supply

fails to shut off, shut off the manual gas valve to the

duct furnace before shutting off the electrical supply.

Do not use the duct furnace if any part has been under

water. Immediately call a qualified service technician to

inspect the duct furnace and replace any gas control

which has been underwater. Failure to follow these

recommendations could result in death or serious

injury.

WARNING

Hazardous Gases and Flammable

Vapors!

Exposure to hazardous gases from fuel substances

have been shown to cause cancer, birth defects or

other reproductive harm. Improper installation,

adjustment, alteration, service or use of this product

could cause flammable mixtures. To avoid hazardous

gases and flammable vapors follow proper

installation and set up of this product and all

warnings as provided in this manual. Failure to follow

all instructions could result in death or serious injury.

4GLND-SVX01B-EN

Introduction

For Your Safety

The use and storage of gasoline or other flammable

vapors and liquids in open containers in the vicinity

of this appliance is hazardous.

If you smell gas:

1. Open windows.

2. Do not touch electrical switches.

3. Extinguish any open flame.

4. Immediately call your gas supplier from a

neighbor’s phone. Follow the gas supplier’s

instructions.

Approved For Use in California When

Equipped With Spark Ignition

Installer’s Responsibility

Installer Please Note: This equipment has been test fired

and inspected. It has been shipped free from defects from

our factory. However, during shipment and installation,

problems such as loose wires, leaks, or loose fasteners

may occur. It is the installer’s responsibility to inspect and

correct any problems that may be found.

Receiving Instructions

Inspect shipment immediately when received to

determine if any damage has occurred to the unit during

shipment. After the unit has been uncrated, check for any

visible damage to the unit. If any damage is found, the

consignee should sign the bill of lading indicating such

damage and immediately file claim for damage with the

transportation company.

Important: It is the equipment owner’s responsibility to

provide any scaffolding or other apparatus

required to perform emergency service or

annual/periodic maintenance to this

equipment.

WARNING

Safety Alert!

You MUST follow all recommendations below. Failure

to do so could result in death or serious injury.

WARNING

Toxic Hazard!

Install, operate and maintain unit in accordance with

manufacturer’s instructions to avoid exposure to fuel

substances or substances from incomplete combustion

which could result in death or serious illness. The state

of California has determined that these substances may

cause cancer, birth defects, or other reproductive harm.

Table of Contents

GLND-SVX01B-EN 5

Warnings, Cautions and Notices . . . . . . . . . . 2

Model Number Descriptions . . . . . . . . . . . . . . 6

Indoor Gas Heating Units . . . . . . . . . . . . . . . 6

Horizontal Blower Assembly . . . . . . . . . . . . 6

General Information . . . . . . . . . . . . . . . . . . . . . 7

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

General Safety Information . . . . . . . . . . . . . 7

Identification of Parts . . . . . . . . . . . . . . . . . . 8

Unit Dimensions and Weights . . . . . . . . . . . . 9

Installation: Mechanical . . . . . . . . . . . . . . . . . 11

Clearances . . . . . . . . . . . . . . . . . . . . . . . . . 12

Air Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Combustion Inlet Air Ventilation . . . . . . . 13

Suspension . . . . . . . . . . . . . . . . . . . . . . . . 13

Nozzle Assembly . . . . . . . . . . . . . . . . . . . 14

Installation: Piping . . . . . . . . . . . . . . . . . . . . . . 16

Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Pipe Sizing . . . . . . . . . . . . . . . . . . . . . . . . 16

Pipe Installation . . . . . . . . . . . . . . . . . . . . . . 17

Installation: Venting . . . . . . . . . . . . . . . . . . . 18

Venting for Power Vented (Category III) Duct

Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Installation: Electrical . . . . . . . . . . . . . . . . . . . 25

Electrical Connections . . . . . . . . . . . . . . . . . 25

Thermostat Wiring and Location . . . . . . 25

Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Power Vented Duct Furnaces with Intermit-

tent (Spark) Pilot Ignition . . . . . . . . . . . . . 27

Gas Equipment Start-Up . . . . . . . . . . . . . . . 32

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Periodic Service . . . . . . . . . . . . . . . . . . . . 33

Installation Instructions for Field Replace-

ment of Power Venter Motor . . . . . . . . . . 36

How to Order Replacement Parts . . . . . . 37

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 38

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . .42

6 GLND-SVX01B-EN

Model Number Descriptions

Indoor Gas Heating

Units

Note: All units are AGA approved. For

CGA approved units, contact Air

Handling Product Support.

Digit 1 — Gas Heating

Equipment

G = Gas Heating Equipment

Digit 2 — Product Type

L = High Efficiency Indoor Duct

Furnace

Digit 3 — Fuel

N= Natural Gas

P=LP Gas (Propane)

Digit 4 — Development

Sequence

D = Fourth Generation

Digits 5, 6, 7 — Input Capacity

Single Furnace

Digit 8 — Main Power Supply

Digit 9 — Gas Control Option

D = Single-Stage, Intermittent Pilot

Ignition

E = Two-Stage, Intermittent Pilot

Ignition

H = Electronic Modulating with

Room

T-Stat, Intermittent Pilot Ignition

J = Electronic Modulating with

Duct-Stat, Intermittent Pilot

Ignition

L = Electronic Modulating with

External 4–20 mA Input

N = Electronic Modulating with

External 0–10 Vdc Input

T = Single Stage Direct Spark

Ignition

V = Two-Stage, Direct Spark Ignition

Digit 10 — Design Sequence

G = Seventh Design

Digit 11 — Heat Exchanger

Material

1 = Aluminized Steel

3 = #321 Stainless Steel

Digit 12 — Rooftop

Arrangements

0 = None (Indoor Unit)

Digit 13 — Rooftop Heating Unit

Motor Selection

0 = None (Indoor Unit and Rooftop

Duct Furnace)

Digit 14 — Rooftop Fan Section

0 = None (Indoor Unit and Rooftop

Duct Furnace)

Digit 15 — Miscellaneous

Options

0=None

A = #409 Stainless Steel Burners

B = Orifices For Elevation Above

2000 Feet (Specify Elevation)

C = #409 Stainless Steel Draft

Diverter

D = Summer-Winter Switch

F = Horizontal Louvers

G = Horizontal and Vertical Louvers

K = Side Access Burner Drawer (Left

Hand)1

L = Fan Time Delay Control

M = Side Access Burner Drawer

(Right Hand)1

Horizontal Blower

Assembly

Digit 1, 2, 3 — Horizontal

Blower Assembly

Digit 4 — Development

Sequence

C = Third Generation

Digit 5, 6 — Blower Size

15 = Nominal 1500 cfm

20 = Nominal 2000 cfm

30 = Nominal 3000 cfm

45 = Nominal 4500 cfm

Digit 7 — Transition Size

(Specifies Duct Furnace Size)

Digit 8 — Main Power Supply

Digit 9 — Motor Horsepower

Digit 10 — Design Sequence

D = Fourth Design

Digit 11 — Miscellaneous

Options

0=None

1 = Insulation

3 = Totally Enclosed Motor

003 = 30 MBh 015 = 150 MBh

004 = 45 MBh 017 = 175 MBh

006 = 60 MBh 020 = 200 MBh

007 = 75 MBh 022 = 225 MBh

009 = 90 MBh 025 = 250 MBh

010 = 100 MBh 030 = 300 MBh

012 = 125 MBh 035 = 350 MBh

040 = 400 MBh

A = 115/60/1 D = 230/60/3

B = 230/60/1 E = 460/60/3

C = 208/60/3 F = 575/60/3

1The left or right hand side of the side access burn-

er drawer, options K & M, is determined by facing

the air outlet side of the duct furnace.

0 = None

A = 100 MBh F = 225 MBh

B = 125 MBh G = 250 MBh

C = 150 MBh H = 300 MBh

D = 175 MBh J = 350 MBh

E=200 MBh K=400 MBh

A = 115/60/1 D = 230/60/3

B = 230/60/1 E = 460/60/3

C = 208/60/3

A = 1/3 hp D = 1 hp

B = 1/2 hp E = 1-1/2 hp

C = 3/4 hp F = 2 hp

GLND-SVX01B-EN 7

General Information

Description

The duct furnace design is certified by ETL for use with

natural and LP (propane) gases. ANSI and NFPA Standards

as well as Canadian installation codes referred to in this

manual are the ones that were applicable at the time that

the design was certified. In addition, the duct furnace may

be installed on the downstream side of a cooling unit,

without need of a bypass duct.

If the unit is to be installed at an altitude exceeding

2,000 feet (610 m) above sea level, derate the input by

4 percent for each 1,000 foot (305 m) rise above sea level.

Special orifices are required for installations above

2,000 feet (610 m).

When units are installed in Canada, any reference to

derations at altitudes in excess of 2000 feet (610 m) are to

be ignored. At altitudes of 2000 to 4500 feet (610 to

1372 m), the units must be orificed to 90 percent of the

normal altitude rating, and be so marked in accordance

with the ETL certification.

General Safety Information

Important: This product must be installed by a licensed

plumber or gas fitter when installed within

the Commonwealth of Massachusetts.

• Installation must be made in accordance with

local codes, or in absence of local codes with the

latest edition of ANSI Standard Z223.1 (N.F.P.A.

No. 54) National Fuel Gas Code.

All of the ANSI and NFPA Standards referred to

in these installation instructions are those that

were applicable at the time the design of this

appliance was certified. The ANSI Standards are

available from the CSA Information Services,

1-800-463-6727. The NFPA Standards are

available from the National Fire Protection

Association, Batterymarch Park, Quincy, MA

02269. These duct furnaces are designed for use

in airplane hangars when installed in

accordance with current ANSI/NFPA No. 409

and in public garages when installed in

accordance with current NFPA No. 88A and

NFPA No. 88B.

If installed in Canada, the installation must

conform with local building codes, or in absence

of local building codes, with CSA-B149.1

“Installation Codes for Natural Gas Burning

Appliances and Equipment” or CSA-B149.2

“Installation Codes for Propane Gas Burning

Appliances and Equipment”. These indoor duct

furnaces have been designed and certified to

comply with CSA 2.6. Also see sections on

installation in “Aircraft Hangers,” p. 11 and

“Public Garages,” p. 11.

• Do not alter the duct furnace in any way or

damage to the unit and/or severe personal injury

or death could occur!

• Turn off the gas supply and disconnect all

electric power, including remote disconnects

before servicing unit. Follow proper lockout/

tagout procedures to ensure the power can not

be inadvertently energized and the gas can not

be inadvertently turned on. Failure to turn off

gas or disconnect power before servicing could

result in death or serious injury.

• Follow installation instructions CAREFULLY to

avoid creating unsafe conditions. All wiring

should be done and checked by a qualified

electrician, using copper wire only. All external

wiring must conform to applicable local codes

and to the latest edition of the National

Electrical Code ANSI/NFPA No. 70.

• All gas connections should be made and leak-

tested by a suitably qualified individual, per

instructions in this manual. Also follow

procedures listed in “Gas Equipment Start-Up,”

p. 32.

• Use only the fuel for which the duct furnace is

designed (see rating plate). Using LP gas in a

heater that requires natural gas, or vice versa,

will create the risk of gas leaks, carbon

monoxide poisoning and explosion.

Important: Do not attempt to convert the furnace

for use with a fuel other than the one

intended. Such conversion is

dangerous, as it could create the risks

listed previously.

• Make certain that the power source conforms to

the electrical requirements of the furnace.

• All field-installed wiring must be completed by

qualified personnel. All field-installed wiring

must comply with NEC and applicable local

codes. Failure to follow this instruction could

result in death or serious injuries.

• Special attention must be given to any

grounding information pertaining to this duct

furnace. To prevent the risk of electrocution, the

furnace must be securely and adequately

grounded. This should be accomplished by

connecting a grounded conductor between the

service panel and the furnace. To ensure a proper

WARNING

Safety Alert!

You MUST follow all recommendations below. Failure

to do so could result in death or serious injury.

General Information

8 GLND-SVX01B-EN

ground, the grounding means must be tested by

a qualified electrician.

• Do not insert fingers or foreign objects into the

furnace or its air moving device. Do not block or

tamper with the heater in any manner while in

operation or just after it has been turned off, as

some parts may be hot enough to cause injury.

• This furnace is intended for general heating

applications ONL

Y. It must NOT be used in

potentially dangerous locations such as

flammable, explosive, chemical-laden or wet

atmospheres.

• In cases in which property damage may result

from malfunction of the furnace, a backup

system or a temperature sensitive alarm should

be used.

• When connecting to existing gas lines be sure to

valve off the gas supply ahead of connection

point. To avoid explosion or possible fire, always

purge all residual gas from piping before cutting

into existing line or removing threaded fittings.

Failure to remove all gas vapors could result in

death or serious injury or equipment or property-

only-damage.

Unless otherwise specified, the following conversions

may be used for calculating SI unit measurements:

Identification of Parts

1 foot = 0.305 m 1 inch water column = 0.249 kPa

1 inch = 25.4 mm 1 meter/second = FPM ÷ 196.8

1 psig = 6.894 kPa 1 liter/second = CFM x 0.472

1 pound = 0.453 kg 1000 Btu per hour = 0.293 kW

1 gallon = 3.785 L 1000 Btu/Cu. Ft. = 37.5 MJ/m3

1 cubic foot = 0.028 m3

Figure 1. Burner assembly parts (bottom view)

OR ELECTRODE/SENSING

LEAD LOCATION

Figure 2. Duct furnace components

Figure 3. Burners/Controls (bottom view)

1. “Packaged” Gas Valve

2. Pilot Observation Point

3. Pilot Burner Assembly Parts

4. Burner “Drawer”

5. Flame Carryover

6. Main Burner

GLND-SVX01B-EN 9

Unit Dimensions and Weights

Figure 4. Power Vented Furnace—bottom service access

Figure 5. Power Vented Duct Furnace—side service access

Table 1. Power Vented Duct Furnace

Unit Size

A B C D (Dia.) F

Gas Inlet

in. Weight

in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) Nat. LP lb (kg)

100 17-7/8 15-1/2 17-1/8 4 23-7/8 1/2 1/2 173

(454) (394) (435) (102) (606) (78)

125 20-5/8 18-1/4 19-7/8 4 25-5/8 1/2 1/2 186

(524) (464) (505) (102) (651) (84)

150 20-5/8 18-1/4 19-7/8 4 26-5/8 1/2 1/2 197

(524) (464) (505) (102) (676) (89)

175 23-3/8 21 22-5/8 4 29-3/8 1/2 1/2 216

(594) (533) (575) (102) (746) (98)

200 26-1/8 23-3/4 25-3/8 5 32-1/8 1/2 1/2 232

(664) (603) (645) (127) (816) (105)

225 28-7/8 26-1/2 28-1/8 5 34-7/8 3/4 1/2 or 3/4 254

(733) (673) (714) (127) (886) (115)

250 31-5/8 29-1/4 30-7/8 5 37-5/8 3/4 1/2 or 3/4 263

(803) (743) (784) (127) (956) (119)

300 37-1/8 34-3/4 36-3/8 6 43-1/8 3/4 1/2 or 3/4 312

(943) (883) (924) (152) (1095) (142)

350 42-5/8 40-1/4 41-7/8 6 48-5/8 3/4 1/2 or 3/4 389

(1083) (1022) (1064) (152) (1235) (176)

400 48-1/8 45-3/4 47-3/8 6 54-1/8 3/4 1/2 or 3/4 403

(1222) (1162) (1203) (152) (1375) (183)

Unit Dimensions and Weights

10 GLND-SVX01B-EN

Table 2. Performance data

Unit Size

Input

Output MIN Temp. Rise P.D. MAX Temp. Rise P.D.MAX MIN

MBh (kW) MBh (kW) MBh (kW) cfm (m3/s) °F (°C) in. of H2O (kPa) cfm (m3/s) °F (°C) in. of H2O (kPa)

100 100 50 80 929 80 0.12 2469 30 0.90

(29.3) (14.6) (23.4) (0.438) (44) (0.03) (1.165) (17) (0.22)

125 125 62.5 100 1157 80 0.13 3086 30 0.80

(36.6) (18.3) (29.3) (0.546) (44) (0.03) (1.457) (17) (0.20)

150 150 75 120 1389 80 0.15 3704 30 0.75

(43.9) (22.0) (35.1) (0.656) (44) (0.04) (1.748) (17) (0.19)

175 175 87.5 140 1620 80 0.14 4321 30 0.75

(51.2) (25.6) (41.0) (0.765) (44) (0.03) (2.040) (17) (0.19)

200 200 100 160 1852 80 0.14 4938 30 0.75

(58.6) (29.3) (46.9) (0.874) (44) (0.03) (2.331) (17) (0.19)

225 225 112.5 180 2083 80 0.14 5556 30 0.75

(65.9) (32.9) (52.7) (0.983) (44) (0.03) (2.622) (17) (0.19)

250 250 125 200 2315 80 0.14 6173 30 0.80

(73.2) (36.6) (58.6) (1.093) (44) (0.03) (2.914) (17) (0.20)

300 300 150 240 2778 80 0.13 7407 30 0.90

(87.8) (43.9) (70.3) (1.311) (44) (0.03) (3.496) (17) (0.22)

350 350 175 280 3241 80 0.13 8642 30 0.90

(102.5) (51.2) (82.0) (1.530) (44) (0.03) (4.079) (17) (0.22)

400 400 200 320 3704 80 0.14 9877 30 0.90

(117.1) (58.6) (93.7) (1.748) (44) (0.03) (4.662) (17) (0.22)

Notes:

1. Ratings are shown for unit installations at elevations between 0 and 2,000 ft. (610 m).

2. For unit installations in U.S.A. above 2,000 ft. (610 m), the unit input must be derated 4 percent for each 1,000 ft. (305 m) above sea level; refer to

local codes, or in absence of local codes, refer to the latest edition of the National Fuel Gas Code, ANSI Standard Z223.1 (N.F.P.A. No. 54).

3. For installations in Canada, any references to deration at altitudes in excess of 2,000 ft. (610 m) are to be ignored.

4. At altitudes of 2,000 to 4,500 ft. (610 to 1372 m), the unit must be derated 90 percent of the normal altitude rating, and be so marked in accordance

with the ETL certification.

Figure 6. Temperature rise and pressure drop graph

GLND-SVX01B-EN 11

Installation: Mechanical

When the unit is equipped with an automatic gas ignition

system, the duct furnaces must be installed such that the

gas ignition control system is not directly exposed to water

spray, rain, or dripping water.

Note: Location of duct furnaces is related directly to the

selection of sizes. Basic rules are as follows:

Aircraft Hangers. Duct furnaces must be installed in

aircraft hangars and public garages as follows: in aircraft

hangars, duct furnaces must be at least 10 feet (3.0 m)

above the upper surface of wings or engine enclosures of

the highest aircraft to be stored in the hangar, and 8 feet

(2.4 m) above the floor in shops, offices and other sections

of the hangar where aircraft are not stored or housed.

Refer to current ANSI/NFPA No. 409, Aircraft Hangars. In

Canada, installation is suitable in aircraft hangars when

acceptable to the enforcing authorities.

Public Garages. In repair garages, duct furnaces must

be installed in a detached building or room separate from

repair areas as specified in the latest edition of NFPA 88B,

Repair Garages.

In parking structures, duct furnaces must be installed so

that the burner flames are located a minimum of 18 inches

(457 mm) above the floor or protected by a partition not

less than 18 inches (457 mm) high. Refer to the latest

edition of NFPA 88A, Parking Structures.

In Canada, installation must be in accordance with the

latest edition of CSA B149 “Installation Codes for Gas

Burning Appliances and Equipment.”

NOTICE:

Equipment Damage!

Do not install duct furnaces in corrosive or flammable

atmospheres! Premature failure of, or severe damage to

the unit could result! Avoid locations where extreme

drafts can affect burner operation. Duct furnaces must

not be installed in locations where air for combustion

would contain chlorinated, halogenated or acidic

vapors. If located in such an environment, premature

failure of the unit could occur!

NOTICE:

Maintain Minimum Thermostat Setting!

Duct furnaces should not be installed to maintain low

temperatures and/or freeze protection of buildings. A

minimum of 50°F (10°C) thermostat setting must be

maintained. If duct furnaces are operated to maintain

lower than 50°F (10°C), hot flue gases are cooled inside

the heat exchanger to a point where water vapor (a flue

gas by-product) condenses onto the heat exchanger

walls. The result is a mildly corrosive acid that

prematurely corrodes the aluminized heat exchanger

and can actually drip water down from the duct furnace

onto the floor surface. Additional duct furnaces should

be installed if a minimum 50°F (10°C) thermostat

setting cannot be maintained. Failure to follow these

recommendations could result in equipment or

property damage.

WARNING

Overheating or Flooding Could Cause Fire

or Explosion!

Overheating or flooding (where any part of the duct

furnace has been under water) could result in fire or

explosion. Should overheating occur, or the gas supply

fails to shut off, shut off the manual gas valve to the

duct furnace before shutting off the electrical supply.

Do not use the duct furnace if any part has been under

water. Immediately call a qualified service technician to

inspect the duct furnace and replace any gas control

which has been underwater. Failure to follow these

recommendations could result in death or serious

injury.

WARNING

Hazardous Gases and Flammable Vapors!

Exposure to hazardous gases from fuel substances

have been shown to cause cancer, birth defects or other

reproductive harm. Improper installation, adjustment,

alteration, service or use of this product could cause

flammable mixtures. To avoid hazardous gases and

flammable vapors follow proper installation and set up

of this product and all warnings as provided in this

manual. Failure to follow all instructions could result in

death or serious injury.

Installation: Mechanical

12 GLND-SVX01B-EN

Clearances

Maintain adequate clearances around air openings into

combustion chamber:

Accessibility

If the unit is a bottom service access type, allow a

minimum of 21 inches (533 mm) at the bottom of the unit

to facilitate servicing the burners and pilot, or six inches

(152 mm) if the unit has a side access burner drawer.

Provision should also be made to assure accessibility for

recurrent maintenance purposes.

Drafts

Avoid installing the duct furnace in an extremely drafty

location. Strong drafts may cause pilot outage. Units with

intermittent pilot ignition may be preferable in areas

where drafts cannot be avoided.

Atmospheres containing commercial solvents or

chlorinated hydrocarbons will produce corrosive acids

when coming in contact with the flames. This will greatly

reduce the life of the gas duct furnace and may void the

warranty. Avoid such areas.

The duct furnace must be installed on the positive

pressure side of the air circulation blower.

Ductwork

Properly designed and installed ductwork, providing a

uniformly distributed flow of air across the surfaces of the

heat exchanger, is essential to satisfactory unit

performance and life of the equipment.

All duct connection flanges/seams must be sealed to

prevent air leaks. Sealant/tape must be suitable for

temperatures 250°F (121°C) minimum.

If uniform air distribution is not obtained, install additional

baffles and/or turning vanes in the ductwork.

Figure 7 and Figure 8 illustrate recommended ductwork

designs for both the straight-through and elbowed air inlet

arrangements.

WARNING

Combustible Materials!

Maintain proper clearance between the unit heat

exchanger, vent surfaces, and combustible materials.

Refer to unit nameplate and installation instructions for

proper clearances. Improper clearances could result in a

fire hazard. Failure to maintain proper clearances could

result in death or serious injury or property damage.

Table 3. Minimum clearances

Sides 6” (152 mm)

Top 6” (152 mm)

Bottom 6” (152 mm)

Flue 6” (152 mm)

Note: When the clearances required for accessibility are greater than the

minimum required safety clearances, the accessibility clearances

take precedence.

WARNING

Fire Hazard!

If the gas duct furnace is to be used in a building

classified as having a hazardous atmosphere, the

installation must comply with the standards set by the

National Board of Fire Underwriters. Consult the

authorities having jurisdiction before starting the job.

Failure to follow recommendations could result in

death or serious injury.

NOTICE:

Use 90° Duct Connection Flanges!

Ducts must be properly connected to duct furnaces for

operation. Do not straighten the 90° duct connection

flanges on the duct furnaces. Straightening the 90° duct

connection flanges will affect the operation of the

furnace and will void the warranty.

Figure 7. Recommended design for field installation of

ductwork for straight-through arrangement

Installation: Mechanical

GLND-SVX01B-EN 13

Access panels large enough to observe smoke and

reflected light, and to detect the presence of leaks in the

heating equipment, are required both upstream and

downstream from gas duct furnaces. These panels must

be sealed to prevent air leaks. If allowed by local

regulations, install canvas connectors between the

ductwork and fan discharge opening to eliminate the

transmission of mechanical vibration.

Air Flow

The installation is to be adjusted to obtain an air

throughput within the range specified on the appliance

rating plate.

Combustion Inlet Air Ventilation

Inlet Air From Another Room

If the duct furnace is installed in a tightly constructed room

or compartment, provide two inlet air openings. The size

of each vent opening should be no less than one square

inch (6.452 square centimeters) of free area for each 1000

Btu/hr. (293 W) input. Each opening must not be less than

100 square inches (645 square centimeters).

Inlet Air From Outdoors

If the enclosed space is to have inlet combustion air from

the outside, the vent opening must not be smaller than one

square inch (6.452 square centimeters) of free area for

each 2500–3000 Btu/hr (733–879 W) input. Each opening

must not be less than 100 square inches (645 square

centimeters).

Bypass

When a gas duct furnace is installed to operate in

conjunction with a summer air conditioning system, the

cfm air delivery of the system blower should be adjusted

to meet the design air volume requirements for cooling. If

this cfm delivery is greater than that required for heating,

resulting in a low air temperature rise, install a damper

bypass around the gas duct furnace to bypass a portion of

the air.

Suspension

Figure 8. Recommended ductwork design for elbowed

arrangement

WARNING

Heavy Objects!

Ensure that all hardware used in the suspension of each

duct furnace is capable of supporting the unit weight.

Failure to do so could result in unit falling off its

mounting location, which could result in death or

serious injury.

NOTICE:

Equipment Damage!

The duct furnace must be hung level from side to side

and front to back, from four suspension points provided

at the top of the unit. Failure to do so could result in

poor performance and/or premature failure of the unit.

Refer to Figure 9, p. 14 for typical suspension

arrangements.

WARNING

Heavy Objects!

Make certain that the lifting methods used to lift the

duct furnace and the method of suspension used in the

field installation of the duct furnace are capable of

uniformly supporting the weight of the furnace at all

times. Make certain that the structure to which the

furnace is mounted is capable of supporting its weight.

Under no circumstances must the heater gas lines, the

venting system or the electrical conduit be used for

support. Failure to follow recommendations could

result in death, serious injury, or property damage.

Installation: Mechanical

14 GLND-SVX01B-EN

Nozzle Assembly

Use the following procedure for assembling the 30-, 60-, or

90-degree nozzle assembly to your unit heater.

1. Remove the louvers and the cone springs from the unit

heater.

2. Remove the four (4) screws from the upper section of

the front of the unit heater and use these same screws

to temporarily attach the top bracket

(P/N 252-07948-00X).

a. Using the holes in the top bracket as a guide, pre-

drill a 1/8” (0.125”) hole at each location across the

front panel of the unit heater.

b. Using the enclosed screws, permanently attach the

top bracket.

3. Remove the upper two (2) screws from the lower

section on the front of the unit heater. Repeat the

procedure described in Step 2 using the bottom

bracket (P/N 252-07949-00X).

4. Using the sixteen (16) 5/16-12 x 1/2 screws, attach the

left and right side panel (P/N 251-07944 and 251-07946)

to the unit heater using the holes to which the louvers

were attached.

5. Using the enclosed #8-18 x 1/2 screws and with the top

panel oriented such that the side with the larger holes

is facing the unit heater, attach the top panel

(P/N 251-07942-00X) to the top bracket and the two (2)

side panels.

Note: The top panel must be attached so that the side

with the larger holes is facing the unit heater;

this is a requirement for later steps in this

installation procedure.

6. Using the enclosed #8-18 x 1/2 screws and with the

bottom panel oriented such that the side with the larger

holes is facing the unit heater, attach the bottom panel

(P/N 251-07943-00X) to the bottom bracket and the two

(2) side panels.

Note: The bottom panel must be attached so that the

side with the larger holes is facing the unit

heater; this is a requirement for later steps in

this installation procedure.

7. For 30-degree nozzle assemblies: Go to Step 10.

8. For 60- and 90-degree nozzle assemblies: Using the

enclosed #8-18 x 1/2 screws and with the top and

bottom panels oriented such that the sides with the

larger holes are facing the unit heater, create a

sub-assembly by attaching the top panel

(P/N 251-07942-00X) and the bottom panel

(P/N 251-07943-00X) to the left side panel

(P/N 251-07945) and to the right side panel

(P/N 251-07947).

Note: The top and bottom panels must be attached so

that the sides with the larger holes are facing

the unit heater; this makes the assembly easier.

Figure 9.

Installation: Mechanical

GLND-SVX01B-EN 15

Note: For 90-degree nozzle assemblies, repeat Step 8

to create a second sub-assembly.

9. For 60- and 90-degree nozzle assemblies: Using the

enclosed #8-18 x 1/2 screws, attach the sub-assembly

created in Step 8 to the 30-degree assembly installed to

the unit (in Step 1 through Step 6 of this procedure).

Attach the corresponding panels (i.e., top panel to top

panel, right side panel to right side panel, etc).

Note: For 90-degree nozzle assemblies, install the

second sub-assembly by attaching it to the first

sub-assembly. Attach the corresponding panels

(i.e., top panel to top panel, right side panel to

right side panel, etc).

10. Install the louvers and cone springs.

16 GLND-SVX01B-EN

Installation: Piping

Gas Piping

Pipe Sizing

To provide adequate gas pressure at the gas duct furnace,

size the gas piping as follows:

1. Find the ft3/hr by using the following formula:

2. Refer to Ta b l e 4, p. 17. Match “Length of Pipe” with

appropriate “Gas Input - Ft3/Hr” value. This value can

then be matched to the pipe size at the left of the table.

Example: It is determined that a 67 foot (20.4 m) run of

gas pipe is required to connect a 200 MBtu gas duct

furnace to a 1,000 Btu/ft3 (0.29 kW) natural gas supply.

Using Table 4, p. 17, a 1-inch nominal diameter pipe is

needed.

Notes:

•See “General Safety Information,” p. 7 for English/SI

(metric) unit conversion factors.

•If more than one gas duct furnace is to be served by the

same piping arrangement, the total cubic feet per hour

input and length of pipe must be considered.

•If the gas duct furnace is to be fired with LP gas, refer

to Table 4 and consult the local LP gas dealer for pipe

size information.

Before any connection is made to an existing line

supplying other gas appliances, contact the local gas

company to make certain that the existing line is of

adequate size to handle the combined load.

WARNING

Flammable Vapors!

When connecting to existing gas lines be sure to valve

off the gas supply ahead of connection point. To avoid

explosion or possible fire, always purge all residual gas

from piping before cutting into existing line or

removing threaded fittings. Failure to remove all gas

vapors could result in death or serious injury or

equipment or property-only damage.

ft3/hr = Input

Btu per ft3

200,000 Btu/hr = 200 ft3/hr

1,000 Btu/ft3

WARNING

Hazard of Explosion and Fire!

Heater installation for use with propane (LP gas) must

be made by a qualified LP Gas Dealer or LP Gas Installer

to ensure that all appropriate codes, installation

procedures, and precautions have been followed.

Failure to follow these instructions could result in death

or serious injury.

Installation: Piping

GLND-SVX01B-EN 17

Pipe Installation

1. Install the gas piping in accordance with applicable

local codes.

2. Check gas supply pressure. Each duct furnace must be

connected to a manifold pressure and a gas supply

capable of supplying its full rated capacity as specified

in Ta b l e 5, p. 18. A field LP tank regulator must be used

to limit the supply pressure to maximum of 14 in. wc

(3.5 kPa). All piping should be sized in accordance with

the latest edition of ANSI Standard Z223.1 National

Fuel Gas Code; in Canada, according to CSA B149. See

Ta b l e 1, p. 9, and Tab l e 4, p. 17 for correct gas supply

piping size.

If gas pressure is excessive on natural gas applications,

install a pressure regulating valve in the line upstream

from the main shutoff valve.

3. To prevent the mixing of moisture with gas, run the

take-off piping from the top, or side, of the main.

4. Standard gas duct furnaces, optional two-stage units,

and hydraulic modulating units are supplied with a

combination valve which includes:

a. Manual “A” valve

b. Manual “B” valve

c. Solenoid valve

d. Pilot safety

e. Pressure regulator

Table 4. Gas pipe size(a)

Nominal

Iron Pipe

Size, in.

Internal

Diameter,

in. (mm)

Length of Pipe, ft (m)

10 20 30 40 50 60 70 80 90 100 125 150 175 200

(3.0) (6.1) (9.1) (12.2) (15.2) (18.3) (21.3) (24.4) (27.4) (30.5) (38.1) (45.7) (53.3) (61.0)

1/2 0.622 175 120 97 82 73 66 61 57 53 50 44 40 37 35

(16) (4.96) (3.40) (2.75) (2.32) (2.07) (1.87) (1.73) (1.61) (1.50) (1.42) (1.25) (1.13) (1.05) (0.99)

3/4 0.824 360 250 200 170 151 138 125 118 110 103 93 84 77 72

(21) (10.2) (7.08) (5.66) (4.81) (4.28) (3.91) (3.54) (3.34) (3.11) (2.92) (2.63) (2.38) (2.18) (2.04)

1 1.049 680 465 375 320 285 260 240 220 205 195 175 160 145 135

(27) (19.3) (13.2) (10.6) (9.06) (8.07) (7.36) (6.80) (6.23) (5.80) (5.52) (4.96) (4.53) (4.11) (3.82)

1-1/4 1.380 1400 950 770 660 580 530 490 460 430 400 360 325 300 280

(35) (39.6) (26.9) (21.8) (18.7) (16.4) (15.0) (13.9) (13.0) (12.2) (11.3) (10.2) (9.20) (8.50) (7.93)

1-1/2 1.610 2100 1460 1180 990 900 810 750 690 650 620 550 500 460 430

(41) (59.5) (41.3) (33.4) (28.0) (25.5) (22.9) (21.2) (19.5) (18.4) (17.6) (15.6) (14.2) (13.0) (12.2)

2 2.067 3950 2750 2200 1900 1680 1520 1400 1300 1220 1150 1020 950 850 800

(53) (112) (77.9) (62.3) (53.8) (47.6) (43.0) (39.6) (36.8) (34.5) (32.6) (28.9) (26.9) (24.1) (22.7)

2-1/2 2.469 6300 4350 3520 3000 2650 2400 2250 2050 1950 1850 1650 1500 1370 1280

(63) (178) (123) (99.7) (85.0) (75.0) (68.0) (63.7) (58.0) (55.2) (52.4) (46.7) (42.5) (38.8) (36.2)

3 3.068 11000 7700 6250 5300 4750 4300 3900 3700 3450 3250 2950 2650 2450 2280

(78) (311) (218) (177) (150) (135) (122) (110) (105) (97.7) (92.0) (83.5) (75.0) (69.4) (64.6)

4 4.026 23000 15800 12800 10900 9700 8800 8100 7500 7200 6700 6000 5500 5000 4600

(102) (651) (447) (362) (309) (275) (249) (229) (212) (204) (190) (170) (156) (142) (130)

Notes:

1. Determine the required ft3/h by dividing the rated heater input by 1000. For SI / Metric measurements: Convert unit Btu/h to kilowatts. Multiply the

unit input (kW) by 0.0965 to determine m3/h.

2. FOR NATURAL GAS: Select the pipe size directly from the table.

3. FOR PROPANE GAS: Multiply the ft3/h (m3/h) value by 0.633; then use the table.

4. Refer to the metric conversion factors listed in “General Safety Information,” p. 7 for more SI unit measurements/conversions.

(a)Maximum capacity of pipe in cubic feet of gas per hour (cubic meters per hour) for gas pressures of 0.5 psig (3.5 kPa) or less, and a pressure drop of

0.5 inch water column (124.4 Pa) (based on a 0.60 specific gravity gas).

WARNING

Hazard of Explosion!

Adequately support the piping to prevent strain on the

gas manifold and controls. To prevent explosion, fire, or

gas leaks, support piping so that piping does not sag or

put pressure on the burners internal to the unit. Failure

to follow these recommendations could result in death

or serious injury or equipment or property-only-

damage.

Installation: Piping

18 GLND-SVX01B-EN

Pipe directly in to combination valve (see Figure 10,

p. 18).

5. A 1/8 in. N.P.T. plugged tapping, accessible for test

gauge connection, must be installed immediately

upstream of the gas supply connection to the

appliance.

6. Provide a drip leg in the gas piping near the gas duct

furnace. A ground joint union and a manual gas shutoff

valve should be installed ahead of the unit heater

controls to permit servicing. The manual main shutoff

valve must be located external to the jacket (see

Figure 10, p. 18).

7. Make certain that all connections have been

adequately doped and tightened.

Note: Use pipe joint sealant resistant to the action of

liquefied petroleum gases regardless of gas

conducted.

The appliance and its individual shutoff valve must be

disconnected from the gas supply piping system during

any pressure testing of that system at test pressures in

excess of 1/2 psig (3.5 kPa).

The appliance must be isolated from the gas supply piping

system by closing its individual manual shutoff valve

during any pressure testing of the gas supply piping

system at test pressures equal to or less than 1/2 psig

(3.5 kPa).

Installation: Venting

ANSI now organizes vented appliances into four

categories.

Category I

Includes non-condensing appliances with negative vent

pressure, like the traditional atmospheric unit heater.

Category II

Groups condensing appliances with negative vent

pressure.

Category III

Appliances are non-condensing and operate with a

positive vent pressure.

Category IV

Covers condensing appliances with positive vent

pressure.

Note: Category II and IV do not apply to equipment

specified within this manual.

NOTICE:

Overtightening!

Do not overtighten the inlet gas piping into the valve.

This may cause stresses that could crack the valve!

WARNING

Hazard of Explosion!

Never use an open flame to detect gas leaks. Explosive

conditions may occur. Use a leak test solution or other

approved methods for leak testing. Failure to follow

recommended safe leak test procedures could result in

death or serious injury or equipment or property-only-

damage.

Figure 10. Pipe installation, standard controls

Table 5. Gas piping requirements

Gas Type Natural Gas Propane (LP) Gas

Single Stage Gas Piping Requirements(a)

(a)For single stage applications only, at normal altitudes.

Manifold Pressure 3.5 in. wc 10.0 in. wc

(0.9 kPa) (2.5 kPa)

Supply Inlet Pressure 14.0 in. wc Max. 14.0 in. wc Max.

(3.5 kPa) (3.5 kPa)

5.0 in wc Min. 11.0 in wc Min.

(1.2 kPa) (2.7 kPa)

Two Stage Gas Piping Requirements(b)

(b)For two stage applications only, at normal altitudes.

Supply Inlet Pressure 6.5 in. wc Min. 11.5 in. wc Min.

(1.6 kPa) (2.9 kPa)

Table 6. Venting categories

Non Condensing Condensing

Negative Vent Pressure I II

Positive Vent Pressure III IV

Installation: Piping

GLND-SVX01B-EN 19

Venting for Power Vented (Category III)

Duct Furnaces

All duct furnaces must be vented!

All venting installations shall be in accordance with the

latest edition of Part 7, venting of Equipment of the

National Fuel Gas Code, ANSI Z223.1, or applicable

provisions of local building codes for power vented units.

Also see p. 21 for additional Canadian installations.

Horizontal vent systems must be in compliance with UL

1738 for installations in the United States, and ULS636 for

installations in Canada.

Power vented units are designed to be used with single

wall vent pipe utilizing horizontal or vertical venting

arrangements. These arrangements must terminate

external to the building using either a single wall or

double wall vent. See Figure 11, p. 20 through Figure 19,

p. 24 for special installation requirements regarding these

venting conditions.

If double wall venting (other than Type B; see preceding

warning) is used, components which are UL Listed and

approved for Category III positive pressure venting

systems MUST be used.

A Briedart Type L, Field Starkap or an equivalent vent cap

must be supplied by the customer for each power vented

unit. The vent pipe diameter MUST be as specified in

Table 1, p. 9 (“D” Dia. Flue Opening). A reducer must be

field installed for 100 through 175 MBh Unit Sizes. All 300

through 400 MBh Unit sizes are factory equipped with the

required flue increaser. Refer to Figure 11, p. 20 through

Figure 19, p. 24 for additional requirements.

The venting system for these appliances shall terminate at

least four feet (1.2 m) below, four feet (1.2 m) horizontal

from, or one foot (0.3 m) above any door, window, or

gravity air inlet into any building.

Through the wall vents for these appliances shall NOT

terminate over public walkways, or over an area where

condensate or vapor could create a nuisance or hazard or

could be detrimental to the operation of regulators, relief

valves, or other equipment.

The vent pipe equivalent length must be five feet (1.5 m)

minimum and must not exceed 50 feet (15.2 m).

Equivalent length is the total length of straight sections

PLUS 15 feet (4.6 m) for each 90 degree elbow, eight feet

(2.4 m) for each 45 degree elbow, and 10 feet (3.0 m) for

the vent cap.

Maintain six inches (152 mm) between vent pipe and

combustible materials. A minimum of 12 inches (305 mm)

of straight pipe is required from the venter outlet before

installing an elbow in the vent system. Never attach an

elbow directly to the venter (see preceding warning).

Use single wall pipe constructed of 26 gauge galvanized

steel or material of equivalent durability and corrosion

resistance for the vent system. For installation in Canada,

use pipe constructed from 0.025-inch thick aluminum or

0.018-inch thick stainless steel.

Any run of single wall vent pipe passing through an

unheated space must be insulated with an insulation

suitable to 550°F.

WARNING

Carbon Monoxide!

Your venting system must not be blocked by any snow,

snow drifts, or any foreign matter. Inspect your venting

system to ensure adequate ventilation exists at all

times! A blocked venting system could result in carbon

monoxide poisoning. Symptoms of such condition

include grogginess, lethargy, inappropriate tiredness, or

flu-like symptoms. Failure to follow these

recommendations could result in death or serious

injury.

WARNING

Carbon Monoxide!

Your venting system must not be blocked by any snow,

snow drifts, or any foreign matter. Inspect your venting

system to ensure adequate ventilation exists at all

times! A blocked venting system could result in carbon

monoxide poisoning. Symptoms of such condition

include grogginess, lethargy, inappropriate tiredness,

or flu-like symptoms. Failure to follow these

recommendations could result in death or serious

injury.

WARNING

Risk of Fire and Carbon Monoxide

Poisoning with Improper Piping!

Never use a pipe of a diameter other than that specified

in Table 1, p. 9! To prevent pipe from melting and

introducing exhaust fumes into the air supply, never

use PVC, ABS or any other non-metallic pipe for

venting! To prevent fan restriction, an elbow should

never be attached directly to the venter. Failure to

follow recommendations could result in death or

serious injury or equipment damage.

WARNING

Risk of Carbon Monoxide Poisoning with

Type B Vent!

Do not use a type B double wall vent internally within

the building on power vented units! Type B vent does

not seal well under positive pressure and could result in

exhaust fume leaks. Failure to follow these

recommendations could result in death or serious

injury.

Installation: Piping

20 GLND-SVX01B-EN

The vent terminal must be installed with a minimum

clearance of four feet (1.2 m) from electric meters, gas

meters, regulators and relief equipment.

Seal ALL vent pipe joints and seams to prevent leakage.

Use General Electric RTV-108 or Dow Corning® RTV-732

silicone sealant or 3M #425 aluminum foil tape or

equivalent.

The vent system must be installed to prevent collection of

condensate. Vertical vent pipes should be equipped with

condensate drains. Pitch horizontal pipes downward 1/4

inch per foot (21 mm per m) toward outlet for condensate

drainage.

Horizontal portions of the venting system shall be

supported at maximum intervals of four feet (1.2 m) to

prevent sagging (in Canada, support at three feet (1 m)

minimum intervals).

Insulate single wall vent pipe exposed to cold air or

running through unheated areas.

Units are shipped from the factory set up for vertical

venting. To convert the power venter for horizontal

venting, remove the shipping support bracket; refer to

Figure 11, p. 20 and Figure 23, p. 35, and follow this

procedure:

1. Hold power venter motor in position.

2. Remove the three Phillips-head screws from the motor

adaptor plate.

3. Remove the three screws which connect the power

venter stack to the power venter housing.

4. Rotate the power venter housing to the horizontal

position.

5. Replace screws accordingly.

Note: The motor, pressure switch, and junction box

bracket MUST remain located as shipped from the

factory for safe operation. Rotate only the blower

housing! If the power venter housing is to be

moved to the right horizontal position, the junction

box must be rotated 90 degrees CCW to clear the

connection. To do this, remove all wires, conduit

and conduit connector from the junction box,

noting location of wires. Move box, using holes

provided. Move

7/8-inch plug from bottom of box to side.

Reconnect all wires according to the unit’s wiring

diagram.

WARNING

Carbon Monoxide!

Never operate duct furnaces without combustion air

and flue gas piping in place. Each unit MUST have its

own combustion air system and MUST NOT be

connected to other vent systems or to a chimney. Your

venting system must not be blocked by any snow, snow

drifts, or any foreign matter. Inspect your venting

system to ensure adequate ventilation exists at all

times! Failure to follow these recommendations could

result in death or serious injury.

Figure 11. (Optional) Top vent position

Table 7. Vent systems—termination clearance

requirements(a)

(a) If the vent terminal is to be installed near ground level, the vent terminal

must be positioned at least six inches above the maximum anticipated

snow depth (see following for Canadian requirements).

Structure

Minimum for

Termination Locations

Door, window or any gravity air inlet 4 feet below

4 feet horizontally

1 foot above

Forced air inlet within 10 ft. 3 feet above

Adjoining building or parapet 6 feet

Adjacent public walkways 7 feet above grade

Installation: Piping

GLND-SVX01B-EN 21

The following instructions apply to Canadian installations

in addition to installation and operating instructions:

1. Installation must conform with local building codes, or

in absence of local codes, with current CSA B149.1,

“Installation Codes for Natural Gas Burning

Appliances and Equipment”, or CSA B149.2,

“Installation Codes for Propane Gas Burning

Appliances and Equipment”.

2. Any references to U.S. standards or codes in these

instructions are to be ignored and the applicable

Canadian standards or codes applied.

3. If using a metal vent system under positive gauge

pressure in Canada, a slip fit vent connection must be

secured by at least two corrosion-resistant screws, or

other mechanical locking means.

4. The vent shall not terminate:

a. Less than six feet (1.8 m) from a combustion air inlet

or another appliance.

b. Less than three feet (1 m) from any other building

opening or any gas service regulator.

c. Directly above a gas utility meter or service

regulator.

Figure 12. Adaptor installation

Refer to specification table and installation manual for proper usage.

Note: USA units—The reducer must be field supplied for 100, 125,

150, and 175 MBh unit sizes.

Installation: Piping

22 GLND-SVX01B-EN

Figure 13. Horizontal arrangement—single wall vent system to single wall termination

Figure 14. Vertical arrangement—single wall vent system to single wall termination

Installation: Piping

GLND-SVX01B-EN 23

Figure 15. Horizontal arrangement—single wall vent system to double wall termination

Figure 16. Vertical arrangement—single wall vent system to double wall termination

Installation: Piping

24 GLND-SVX01B-EN

Figure 17. Horizontal left vent position (rear view of

unit heater)

Figure 18. Horizontal right vent position (rear view of

unit heater)

Figure 19. Vertical vent position (side view of unit

heater)

Tee With Drip Leg &

Cleanout Cap At Lowes t

Point Of Vent System (Typ.) D4072

To Horizontal Flue

Vent Termination

Reducer/Increaser

Where Applicable

Power Venter

Tee With Drip Leg &

Cleanout Cap At Lowes t

Point Of Vent System (Typ.)

D4073

To Horizontal Flue

Vent Termination

Reducer/Increaser

Where Applicabl e

D4071

AI R FLO W

Power Venter

Tee With

Drip Leg &

Cleanout Cap

To Vertical Flue

Vent Termination

Reducer/Increaser

Where Applicable

GLND-SVX01B-EN 25

Installation: Electrical

Electrical Connections

Standard units are shipped for use on 115 volt, 60 hertz

single phase electric power. The motor nameplate and

electrical rating of the transformer should be checked

before energizing the duct furnace electrical system. All

external wiring must conform to the latest edition of ANSI/

NFPA No. 70 National Electrical Code and applicable local

codes; in Canada, to the Canadian Electrical Code, Part 1

CSA Standard C22.1.

It is recommended that the electrical power supply to each

duct furnace be provided by a separate, fused, and

permanently live electrical circuit. A disconnect switch of

suitable electrical rating for each duct furnace should be

located as close to the gas valve and controls as possible.

Each duct furnace must be electrically grounded in

accordance with the latest edition of the National Electric

Code, ANSI/NFPA No. 70 or CSA Standard C22.1.

Thermostat Wiring and Location

Note: The thermostat must be mounted on a vertical,

vibration-free surface, free from air currents, and in

accordance with the furnished instructions.

Mount the thermostat approximately 5 feet (1.5 m) above

the floor in an area where it will be exposed to a free

circulation of average temperature air. Always refer to the

thermostat instructions as well as our unit wiring diagram,

and wire accordingly. Avoid mounting the thermostat in

the following locations:

1. Cold areas—Outside walls or areas where drafts may

affect the operation of the control.

2. Hot areas—Areas where the sun’s rays, radiation, or

warm air currents may affect control operation.

3. Dead areas—Areas where air cannot circulate freely,

such as behind doors or in corners.

Note: Thermostat wires tagged “W” and “G” must be

connected together except when using a general

purpose “SPDT” 24 Vac relay and a standard

thermostat with subbase, or when using

Honeywell T834H or T834N thermostats. Also refer

to Figure 20, p. 25 for other wiring connections.

Thermostat Heat Anticipator Adjustments. The

initial heat anticipator setpoint should equal the heater

control circuit’s current amperage draw when the unit is

firing. This current should be measured for the best

WARNING

Hazardous Service Procedures!

The maintenance and troubleshooting procedures

recommended in this section of the manual could result

in exposure to electrical, mechanical or other potential

safety hazards. Always refer to the safety warnings

provided throughout this manual concerning these

procedures. When possible, disconnect all electrical

power including remote disconnect and discharge all

energy storing devices such as capacitors before

servicing. Follow proper lockout/tagout procedures to

ensure the power can not be inadvertently energized.

When necessary to work with live electrical

components, have a qualified licensed electrician or

other individual who has been trained in handling live

electrical components perform these tasks. Failure to

follow all of the recommended safety warnings

provided, could result in death or serious injury.

WARNING

Hazardous Voltage and Gas!

Turn off the gas supply and disconnect all electric

power, including remote disconnects before servicing

unit. Follow proper lockout/tagout procedures to

ensure the power can not be inadvertently energized

and the gas can not be inadvertently turned on. Failure

to turn off gas or disconnect power before servicing

could result in death or serious injury.

WARNING

Proper Field Wiring and Grounding

Required!

All field wiring MUST be performed by qualified

personnel. Improperly installed and grounded field

wiring poses FIRE & ELECTROCUTION hazards. To

avoid these hazards, you MUST follow requirements for

field wiring installation and grounding as described in

NEC and your local/state electrical codes. Failure to

follow these requirements could result in death or

serious injury.

NOTICE:

Use Copper Conductors Only!

Unit terminals are not designed to accept other types

of conductors. Failure to use copper conductors could

result in equipment damage.

Figure 20. C1267G, thermostat wiring diagram

Installation: Electrical

26 GLND-SVX01B-EN

results. Use the recommended ranges as a guide. If further

information is needed, consult your thermostat

manufacturer’s instructions.

Recommended Heat Anticipator Setting Ranges:

Fan Time Delay Control

Leads from the time delay controls are factory wired to the

junction box (when ordered as an optional component).

The fan control is a time delay relay (approximately

45 seconds ON, 65 seconds OFF). The fan control is rated

at 17 amps.

Notes:

•The start-up fan delay must not exceed 90 seconds

from a cold start.

•For all wiring connections, refer to the wiring diagram

shipped with your unit (either affixed to the side jacket

or enclosed in your unit’s installation instruction

envelope). Should any original wire supplied with the

heater have to be replaced, it must be replaced with

wiring material having a temperature rating of at least

105°C.

Should any high limit switch wires have to be replaced,

they must be replaced with wiring material having a

temperature rating of 200°C minimum.

25 ft. (7.6 m) T’stat

Wiring 50 ft. (15.2 m) T’stat Wiring

0.85 to 0.90 A 0.90 to 1.1 A Max. Setting on T’stat

GLND-SVX01B-EN 27

Start-Up

Operation

Power Vented Duct Furnaces with

Intermittent (Spark) Pilot Ignition

Explanation of Controls

1. The duct furnace is equipped with a dual automatic gas

valve and electric ignition device (separate from the

gas valve on most models) which provide the following

functions:

a. The duct furnace is equipped with a power vent

system consisting of a power venter motor and

blower, pressure switch, and sealed flue collector in

place of the conventional draft diverter.

b. The power venter motor is energized by the room

thermostat on a call for heat. The pressure switch

measures the flow through the vent system and

energizes the indirect spark ignition system when

the flow is correct.

c. The indirect spark ignition system consists of an

ignition control module, a dual combination gas

valve, and a spark-ignited pilot burner. When the

pressure switch closes, the pilot valve opens and a

spark is generated to light the pilot burner. When

the flame sensing circuit senses that pilot flame is

established, the main gas valve is opened to supply

gas to the main burners. When the thermostat is

satisfied, the vent system is de-energized and both

valves are closed to stop all flow of gas to the unit.

d. Pilot solenoid valve also functions as a main gas

valve to provide redundancy.

e. Pressure regulator provides proper and steady gas

pressure to the main burners.

f. Manual shutoff valve for service and long term

shut-down. (Separate from the automatic valve on

some models.)

2. The high limit switch interrupts the flow of electric

current to the main gas valve in case the heater

becomes overheated.

3. The fan switch delays the operation of the fan until the

heater is warmed, then keeps the fan running after the

gas has been turned off until the useful heat has been

removed. The start-up fan delay must not exceed

90 seconds from a cold start.

4. The wall thermostat (supplied optionally) is a

temperature sensitive switch which operates the vent

system and ignition system; it turns the main gas valve

ON or OFF to control the temperature of the space

being heated. It must be mounted on a vibration free,

vertical surface away from air currents, in accordance

with the instructions furnished with the thermostat

(also refer to “Installation: Electrical,” p. 25).

Start-Up

1. Open the manual valve supplying gas to the unit

heater, and with the union connection loose, purge air

from the gas line. Tighten the union and check for gas

leaks, using a soapy water solution only.

2. Open the manual valve on the unit heater.

3. Turn ON electrical power.

WARNING

Check and Test Safety Devices!

It is the installer’s responsibility to check all safety

controls! Check and test the operational functions of all

safety devices supplied with this unit, and ensure that

all are operating effectively. Failure to do so could result

in unsafe conditions and could result in death, serious

injury or property damage.

NOTICE:

Operate Unit within Specified Units!

Never operate the unit beyond the specified limits,

severe damage to, and/or premature failure of the unit

will result!

WARNING

Risk of Fire and Carbon Monoxide

Poisoning!

The pressure switch MUST NOT be bypassed. The unit

MUST NOT be fired unless the power venter is

operating. Failure to follow these recommendations

could result in death or serious injury.

NOTICE:

Additional Devices!

The addition of external draft hoods or power venters is

not permitted. Addition of such devices could cause

severe unit malfunction or failure!

WARNING

Hazard of Explosion!

Never use an open flame to detect gas leaks. Explosive

conditions may occur. Use a leak test solution or other

approved methods for leak testing. Before attempting

to light or relight the pilot, wait 5 minutes to allow gas

which may have accumulated in the burner

compartment to escape. Failure to follow

recommended safe leak test procedures or pilot

lighting/relighting instructions could result in death or

serious injury or equipment or property-only-damage.

Start-Up

28 GLND-SVX01B-EN

4. The unit should be under the control of the thermostat.

Turn the thermostat to the highest point and determine

that the power venter motor starts and the pilot and

main burners ignite. Turn the thermostat to the lowest

point and determine that the power venter motor shuts

off and pilot and main burners are extinguished.

5. If pilot adjustment is required, remove the pilot

adjustment seal cap and adjust the pilot screw to

obtain proper flame. Clockwise rotation decreases

pilot flame size. Replace the cap.

6. Turn the thermostat to the desired position.

7. Refer to “Gas Pressure Adjustments,” p. 30 for more

specifications.

Shut-Down

1. Turn the valve selector knob to the “OFF” position.

2. Turn off the electricity.

3. To relight, follow the instructions in “Start-Up,” p. 27

(preceding section).

See Figure 21, p. 29 for burner component parts/

identification.

Start-Up

GLND-SVX01B-EN 29

Figure 21. Burner components—intermittent pilot ignition(a)

(a) Also refer to Figure 1, p. 8 through Figure 3, p. 8, Figure 23, p. 35, and Figure 24, p. 36 for component locations.

Burner Drawer Common Parts:

1. Main Burners

2. Burner Manifold

Note: Manifold shown for duct furnaces with

bottom service access.

3. Air Shutters

4. Burner Springs

5. Main Burner Orifice

6. Transformer

7. Pilot Tubing

Controls:

8A.Main Gas Valve (Honeywell)

8B.Main Gas Valve (White-Rodgers)

9. Honeywell Ignitor

10. Honeywell Pilot Burner

11. Honeywell Pilot Orifice

13. High Limit (Safety device located on the rear

header plate of the heat exchanger, air inlet side.)

D4298A

SPARK

MV/PV

GND

(BURNER)

567

24V

(GND

)

24V

TH-W

(OPT.)

Honeywell

WARNING

S8600M

CONTINUOUS RE-TRY

100% SHUTOFF IP

90 SEC. TRIAL FOR IGNITION

D3684A

Start-Up

30 GLND-SVX01B-EN

Gas Input Rate

Check the gas input rate as follows:

1. Turn off all gas appliances that utilize gas through the

same gas meter as the heater.

2. Turn gas on to the unit heater.

3. Using the gas meter, clock the time that it takes to burn

one cubic foot of gas (Heating Value).

4. Insert the time, in seconds, into the formula below:

Example: If the heating value = 1000 BTU/ft3 and the time/

ft3 = 18 s/ft3 then

Input Rate = 200,000 BTU/hr

(Refer to “General Safety Information,” p. 7 for metric

conversions.)

Note: If the computation exceeds, or is less than 95

percent of the gas Btu/h input rating (see “Unit

Dimensions and Weights,” p. 9), adjust the gas

pressure:.

Gas Pressure Adjustments

Adjust the gas pressure as follows:

1. NATURAL GAS: Best results are obtained when the

heater is operating at its full input rating with the

manifold pressure of 3.5 inches wc (0.9 kPa).

Adjustment of the pressure regulator is not normally

necessary since it is preset at the factory.

However, field adjustment may be made as follows:

a. Attach manometer at pressure tap plug adjacent to

control outlet.

b. Remove the regulator adjustment screw cap,

located on the combination gas valve.

c. With a small screwdriver, rotate the adjustment

screw counterclockwise to decrease or clockwise to

increase pressure. Do not force beyond stop limits.

d. Replace regulator adjustment screw cap.

2. PROPANE GAS: An exact manifold pressure of

10.0 inches wc (2.5 kPa) must be maintained for proper

operation of the heater. If the unit is equipped with a

pressure regulator on the combination gas valve,

follow Step a through Step d (above). If the unit is not

so equipped, the propane gas supply system pressure

must be regulated to attain this manifold operating

pressure.

Primary Air Shutter Adjustment

After the unit has been operating for at least 15 minutes,

adjust the primary air flow to the burners. Turn the friction-

locked, manually-rotated air shutters clockwise to close, or

counterclockwise to open.

For correct air adjustment, close the air shutter until yellow

tips in the flame appear. Then open the air shutter to the

point just beyond the position where yellow tipping

disappears. Refer to Figure 22.

Note: There may be momentary and spasmodic orange

flashes in the flame. This is caused by the burning

of airborne dust particles, and should not be

confused with the yellow tipping, which is a stable

or permanent situation when there is insufficient

primary air.

NOTICE:

Overfiring!

Never overfire the duct furnace, as this could cause

unsatisfactory operation, or shorten the life of the

heater.

Input Rate = Heating Value (Btu/ft3) (3600 s/hr)

Time (s/ft3)

Input Rate = (1000 BTU/ft3) (3600 s/hr)

18 s/ft3

Table 8. Main burner orifice schedule(a)

(a) This schedule is for units operating at normal altitudes of 2000 feet

(610 m) or less. SPECIAL ORIFICES ARE REQUIRED FOR INSTALLA-

TIONS ABOVE 2,000 FEET (610 m).

Input in

1000

BTU(a)

Type of Gas Natural Propane

No. of

Burner

Orifices

Heating

Value

1075 BTU/ft3

(40.1 MJ/m3)

2500 BTU/ft3

(93.1 MJ/m3)

Manifold

Pressure 3.5” wc (0.9 kPA)

10” wc (2.5 kPA)

100 ft3/hr 96 40 4

Orifice Drill 42 54

125 ft3/hr 120 50 5

Orifice Drill 42 54

150 ft3/hr 140 60 6

Orifice Drill 42 54

175 ft3/hr 163 70 7

Orifice Drill 42 54

200 ft3/hr 186 80 8

Orifice Drill 42 54

225 ft3/hr 210 90 9

Orifice Drill 42 54

250 ft3/hr 233 100 10

Orifice Drill 42 54

300 ft3/hr 280 120 12

Orifice Drill 42 54

350 ft3/hr 326 140 14

Orifice Drill 42 54

400 ft3/hr 372 160 16

Orifice Drill 42 54

Note: When installed in Canada, any references to deration at altitudes in

excess of 2000 feet (610 m) are to be ignored. At altitudes of 2000

to 4500 feet (610 to 1372 m), the unit heaters must be orificed to

90 percent of the normal altitude rating, and be so marked in

accordance with the ETL certification.

Start-Up

GLND-SVX01B-EN 31

Pilot Adjustment

1. Remove the pilot adjustment cap.

2. Adjust the pilot screw to provide a properly sized

flame.

3. A proper pilot flame is a soft steady flame that

envelops 3/8- to 1/2-inch (9.5 to 12.7 mm) of the flame

sensor tip.

4. Replace the pilot adjustment cap.

Manifold Pressure Adjustment

If the manifold pressure requires minor adjustment,

remove the cap from the pressure regulator and turn the

adjustment screw clockwise to increase the pressure, or

counterclockwise to decrease the pressure. The adjusted

manifold pressure should not vary more than 10 percent

from the pressures specified in Table 8, p. 30.

Figure 22. Main burner flames

LIFTING

(TOO MUCH AIR)

NORMAL

(HARD FLAME)

YELLOW TIPPING

(MARGINAL)

YELLOW FLAME

(TOO LITTLE AIR)

Start-Up

32 GLND-SVX01B-EN

Gas Equipment Start-Up

Customer _____________________________________________ Job Name & Number _________________________

Pre-Inspection Information with Power and Gas Off

Type of Equip: Indoor Duct Furnace

Serial Number: _________________________ Model Number: _____________________________

Name Plate Voltage: ____________________ Name Plate Amperage: ______________________

Type of Gas: Natural LP Tank Capacity: _______ lb Rating: _______ Btu @ ____ °F

_______ kg ________ kW @ ____ °C

Are all panels, doors, vent caps in place?

Has the unit suffered any external damage? Damage ______________________________

Does the gas piping and electric wiring appear to be installed in a professional manner?

Has the gas and electric been inspected by the local authority having jurisdiction?

Is the gas supply properly sized for the equipment?

Were the installation instructions followed when the equipment was installed?

Have all field installed controls been installed?

Do you understand all the controls on this equipment? If not, contact your wholesaler or rep. (DO NOT START

this equipment unless you fully understand the controls.)

Remarks: _____________________________________________________________________________________________________

_______________________________________________________________________________________________________________

GENERAL

With power and gas off.

Make certain all packing has been removed.

Tighten all electrical terminals and connections.

Check all controls for proper settings.

GAS HEATING

With power and gas on.

Inlet gas pressure. ____ in. wc or ____ kPa

Pilot and main burner ignition.

Manifold gas pressure. ____ in. wc or ____ kPa

Check electronic modulation. Set at: __________

Cycle and check all other controls not listed.

Check operation of remote panel.

Entering air temp. _____ °F or ____ °C

Discharge air temp. (high fire) ____ °F. or ____ °C

External static pressure _________ in. wc

Cycle by thermostat or operating control.

Carbon Monoxide ____ ppm

Carbon Dioxide ____ %

GLND-SVX01B-EN 33

Maintenance

Periodic Service

All Maintenance/Service information should be recorded

accordingly on the inspection sheet provided in this

manual (see “Gas Equipment Start-Up,” p. 32).

Note: The heater and vent system should be checked

once a year by a qualified technician.

Important: Gas tightness of the safety shut-off valves

must be checked on at least an annual basis.

To check gas tightness of the safety shut-off valves, turn off

the manual valve upstream of the appliance combination

control. Remove the 1/8-inch pipe plug on the inlet side of

the combination control and connect a manometer to that

tapping. Turn the manual valve on to apply pressure to the

combination control. Note the pressure reading on the

manometer, then turn the valve off. A loss of pressure

indicates a leak. If a leak is detected, use a soap solution to

check all threaded connections. If no leak is found,

combination control is faulty and must be replaced before

putting appliance back in service.

Should maintenance be required, perform the following

inspection and service routine:

1. Inspect the area near the unit to be sure that there is no

combustible material located within the minimum

clearance requirements listed in this manual (see

“Installation: Mechanical,” p. 11 and Table 3, p. 12).

2. Turn off the manual gas valve and electrical power to

the gas duct furnace.

3. To clean or replace the main burners, remove the

bottom panel and compress the spring by moving the

burner toward the manifold. Slide the opposite end of

the burner downward from the locating slot while

retaining spring is still compressed. Pull the burners

away from the manifold.

4. With the burners removed, wire brush the inside

surfaces of the heat exchanger.

5. Remove any dirt, dust, or other foreign matter from the

burners using a wire brush and/or compressed air.

Ensure that all parts are unobstructed. Inspect and

clean pilot burner if necessary.

6. Reassemble the gas duct furnace by replacing all parts

in reverse order.

7. Complete the appropriate unit start-up procedure as

given in “Operation,” p. 27 (see lighting instruction

plate on the access side of the unit).

8. Check the burner adjustment (see “Primary Air Shutter

Adjustment,” p. 30).

9. Check all gas control valves and pipe connections for

leaks.

10. Check the operation of the automatic gas valve by

lowering the setting of the thermostat, stopping the

operation of the gas duct furnace. The gas valve should

close tightly, completely extinguishing the flame on

the main burners.

11. Check the operation of the pilot safety device by

closing the pilot line valve, extinguishing the pilot

flame. Within one minute the automatic gas valve

WARNING

Hazardous Service Procedures!

The maintenance and troubleshooting procedures

recommended in this section of the manual could

result in exposure to electrical, mechanical or other

potential safety hazards. Always refer to the safety

warnings provided throughout this manual concerning

these procedures. When possible, disconnect all

electrical power including remote disconnect and

discharge all energy storing devices such as capacitors

before servicing. Follow proper lockout/tagout

procedures to ensure the power can not be

inadvertently energized. When necessary to work with

live electrical components, have a qualified licensed

electrician or other individual who has been trained in

handling live electrical components perform these

tasks. Failure to follow all of the recommended safety

warnings provided, could result in death or serious

injury.

WARNING

Hazardous Voltage and Gas!

Turn off the gas supply and disconnect all electric

power, including remote disconnects before servicing

unit. Follow proper lockout/tagout procedures to

ensure the power can not be inadvertently energized

and the gas can not be inadvertently turned on. Failure

to turn off gas or disconnect power before servicing

could result in death or serious injury.

WARNING

Hazard of Explosion!

Never use an open flame to detect gas leaks. Explosive

conditions may occur. Use a leak test solution or other

approved methods for leak testing. Failure to follow

recommended safe leak test procedures could result in

death or serious injury or equipment or property-only-

damage.

WARNING

Combustible Materials!

Maintain proper clearance between the unit heat

exchanger, vent surfaces and combustible materials.

Refer to unit nameplate and installation instructions for

proper clearances. Improper clearances could result in a

fire hazard. Failure to maintain proper clearances could

result in death or serious injury or property damage.

Maintenance

34 GLND-SVX01B-EN

should close, extinguishing the flame on the main

burners.

12. Inspect and service the blower section of the system.

13. Check and test the operational functions of all safety

devices supplied with your unit.

Maintenance

GLND-SVX01B-EN 35

Figure 23. Power venter assembly (Power Vented Duct Furnaces only)

For usage, see Figure 4, p. 9, Figure 5, p. 9, Figure 12, p. 21, Figure 17, p. 24, Figure 19, p. 24, and Tab l e 1 , p . 9.

Ref. No. Description

1 Blower Housing Assembly

2Speed Nut

3 Motor

4 Washer, Plain

5 Plate Adapter

6 Blower Wheel

7 Mounting Bracket (Pressure Switch)

8 Mounting Bracket (Junction Box)

9Screw, S.T.

10 Screw, Machine (L = 3/4”)

11 Nut, Keps (Ext. Lock Washer)

12 Air Pressure Switch

13 Drill Screw

14 Junction Box Assembly

Ref. No. Description

15 Snap Bushing

16 Relay

17 Straight Connector

19 Shield (Pressure Switch)

20 Anti-Short

21 Flex Conduit (23” Long)

22 Flex Conduit (24” Long)

23 Slotted Head Machine Screw (L = 7/8”)

24 Draftor Stack Assembly

25 1/4” Aluminum Tubing

26 Male Connector

27 Locknut

28 Nut, Keps (Ext. Lockwasher)

29 7/8” Plug

Maintenance

36 GLND-SVX01B-EN

Installation Instructions for Field

Replacement of Power Venter Motor

Important: This replacement must be performed only

by a qualified technician.

Note: All hardware (screws, nuts, washers) that will be

removed from the unit will be reused for this motor

replacement. DO NOT LOSE ANY OF THESE

PARTS.

Tools and Parts Needed

Wire Stripper and Crimper; Slotted Head and #2 Phillips

Head Screwdriver; 3/8-in. Wrench; 1/8-in. Allen Wrench

(long handle); marker; (1) 1/4-in. push on terminal for Wire.

Notes:

•Remove the cover from the Relay Junction Box (Item 1)

by removing two screws (Item 2) top and bottom.

Disconnect both wires from the motor lead ends. One

is connected to terminal #4 on the venter relay, and the

other is connected with a wire nut to a black wire.

•Remove the sensing tube (Item 3) from the Pressure

Switch/Mounting Bracket (Item 3) at motor end only.

Separated Combustion Units: Remove both tubes at

motor end only—note location.

•Mark locations of the Relay Junction Box and Pressure

Switch Mounting Brackets along with the Motor (Item

10) mounts on the Mounting Adapter Plate (Item 4)—

using a marker.

•Remove nut (Item 5) that secures the Motor Support

Shipping Bracket (Item 6) to the Mounting Adapter

Plate. Pull this bracket away from the Motor Mounting

Adapter Plate.

•Remove three phillips head screws (Item 7) on the

Motor mounting Adapter Plate. Remove the Motor/

Blower Wheel/Adapter Plate assembly from the Power

Venter Blower Housing (Item 8).

•Remove the Blower Wheel (Item 9) from the motor

shaft by removing the set screw (Item 14) using a 1/8-in.

Allen Wrench.

•Remove the three Motor Mounting Nuts (Item 5),

Space Washers (Item 11), and Screws (Item 12). Do not

lose these parts! Using caution—the motor will

disengage from the Mounting Adapter Plate, along

with the Relay Junction Box and Pressure Switch

Mounting Brackets will also disengage.

•Reverse order to install the new Power Venter Motor.

•TEST FIRE THE UNIT FOR A FEW CYCLES, MAKING

SURE THAT THE UNIT IS OPERATING

SATISFACTORILY.

Figure 24. Identification of parts

Ref. No. Description

1 Relay Junction Box/Mounting

Bracket Assembly

2 #8 Drill Screws (2 required)

3 Pressure/Mounting Bracket

Assembly

4 Mounting Plate Adapter

5 Keps Nut w/External Tooth

Lockwasher (4 required)

6 Motor Support Shipping Bracket

7 Phillips Head Screws (3 required)

8 Power Venter Blower Housing

9Blower Wheel

10 Motor

11 Space Washers (3 required)

12 Machine Screw (3 required)

13 Sensing Tube

14 Set Screw

Maintenance

GLND-SVX01B-EN 37

How to Order Replacement Parts

Please send the following information to your local Parts

center; If further assistance is needed, contact the

manufacturer’s customer service department.

•Model number

• Serial Number

• Part description and Number as shown in the

Replacement Parts Catalog.

38 GLND-SVX01B-EN

Diagnostics

Troubleshooting

WARNING

Hazardous Service Procedures!

The maintenance and troubleshooting procedures

recommended in this section of the manual could result

in exposure to electrical, mechanical or other potential

safety hazards. Always refer to the safety warnings

provided throughout this manual concerning these

procedures. When possible, disconnect all electrical

power including remote disconnect and discharge all

energy storing devices such as capacitors before

servicing. Follow proper lockout/tagout procedures to

ensure the power can not be inadvertently energized.

When necessary to work with live electrical

components, have a qualified licensed electrician or

other individual who has been trained in handling live

electrical components perform these tasks. Failure to

follow all of the recommended safety warnings

provided, could result in death or serious injury.

Table 9. Troubleshooting guide

Symptoms Possible Cause(s) Corrective Action

A. Flame lifting from burner ports. 1. Pressure regulator set too high. 1. Reset manifold pressure. Refer to “Operation,” p. 27.

2. Defective regulator. 2. Replace regulator section of combination gas valve or

complete valve.

3. Burner orifice too large. 3. Check with local gas supplier for proper orifice size and

replace. Refer to “Operation,” p. 27.

B. Flame pops back. 1. Excessive primary air. 1. Close air shutter. Refer to “Operation,” p. 27.

2. Burner orifice too small. 2. Check with local gas supplier for proper orifice size and

replace. Refer to “Operation,” p. 27.

C. Noisy flame. 1. Too much primary air. 1. Close air shutter.

2. Noisy pilot. 2. Reduce pilot gas. Refer to “Operation,” p. 27.

3. Irregular orifice causing whistle or

resonance. 3. Replace orifice.

4. Excessive gas input. 4. Reset manifold pressure. Refer to “Operation,” p. 27;

Replace regulator section of combination gas valve or

complete valve; or check with local gas supplier for proper

orifice size and replace. Refer to “Operation,” p. 27.

D. Yellow tip flame (some yellow

tipping on propane gas is

permissible).

1. Insufficient primary air. 1. Open air shutters. Refer to “Operation,” p. 27.

2. Clogged main burner ports. 2. Clean main burner ports.

3. Misaligned orifices. 3. Replace manifold assembly.

4. Clogged draft hood. 4. Clean draft hood.

5. Air shutter linted. 5. Check for dust or lint at air mixer opening and around the

air shutter.

6. Insufficient combustion air. 6. Clean combustion air inlet openings in bottom panel; see

“Installation: Piping,” p. 16.

E. Floating flame. 1. Blocked venting. 1. Clean flue. Refer to “Installation: Piping,” p. 16.

2. Insufficient combustion air. 2. Clean combustion air inlet openings in bottom panel; see

“Installation: Piping,” p. 16.

3. Blocked heat exchanger. 3. Clean heat exchanger.

4. Air leak into combustion chamber

or draft hood. 4. Determine cause and repair accordingly.

Diagnostics

GLND-SVX01B-EN 39

F. Gas Odor. 1. Shut off gas supply

immediately!

1. Inspect all gas piping and repair.

2. Blocked heat exchanger/venting. 2. Clean heat exchanger/flue.

3. Drafts around heater. 3. Eliminate drafts. Refer to “Installation: Mechanical,” p. 11.

4. Negative pressure in building. 4. See “Installation: Piping,” p. 16.

5. Blocked draft hood. 5. Clean draft hood.

G. Delayed ignition. 1. Excessive primary air. 1. Close air shutter. Refer to “Operation,” p. 27.

2. Main burner ports clogged near

pilot. 2. Clean main burner ports.

3. Pressure regulator set too low. 3. Reset manifold pressure. Refer to “Operation,” p. 27.

4. Pilot decreases in size when main

burners come on. 4. Supply piping is inadequately sized. Refer to “Installation:

Piping,” p. 16.

5. Pilot flame too small. 5. Clean pilot orifice. Refer to “Operation,” p. 27.

6. Drafts around heater. 6. Eliminate drafts. Refer to “Installation: Mechanical,” p. 11.

7. Improper venting. 7. Refer to “Installation: Piping,” p. 16.

H. Failure to ignite. 1. Main gas off. 1. Open all manual gas valves.

2. Lack of power at unit. 2. Replace fuse or turn on power supply.

3. Thermostat not calling for heat. 3. Turn up thermostat.

4. Defective limit switch. 4. Check limit switch with continuity tester. If open, replace

limit switch.

5. Improper thermostat or

transformer wiring. 5. Check wiring per diagrams.

6. Defective gas valve. 6. Replace gas valve.

7. Defective thermostat. 7. Check thermostat and replace if defective.

8. Defective transformer. 8. Be sure 115 volts is supplied to the transformer primary,

then check for 24 volts at secondary terminal before

replacing.

9. Loose wiring. 9. Check and tighten all wiring connections per diagrams.

10. Defective ignition control. 10. Replace, if necessary. Also see U, V, and W symptoms.

I. Condensation of water vapor. 1. Improper venting 1. Refer to “Installation: Venting,” p. 18.

J. Burner won't turn off. 1. Poor thermostat location. 1. Relocate thermostat away from drafts.

2. Defective thermostat. 2. Replace thermostat.

3. Improper thermostat or

transformer wiring at gas valve. 3. Check wiring per diagrams.

4. Short circuit. 4. Check operation at valve. Check for short (such as staples

piercing thermostat wiring), and correct.

5. Defective or sticking gas valve. 5. Replace gas valve.

6. Excessive gas supply pressure. 6. Refer to “Installation: Piping,” p. 16.

K. Rapid burner cycling. 1. Loose electrical connections at gas

valve or thermostat. 1. Tighten all electrical connections.

2. Excessive thermostat heat

anticipator. 2. Adjust thermostat heat anticipator for longer cycles. Refer

to “Installation: Electrical,” p. 25.

3. Unit cycling on high limit. 3. Check for proper air supply across heat exchanger.

4. Poor thermostat location. 4. Relocate thermostat. (Do not mount thermostat on unit).

5. Draft on pilot. 5. Eliminate drafts. Refer to “Installation: Mechanical,” p. 11.

6. Defective ignitor control. 6. Replace ignitor.

7. Defective high limit switch. 7. Jumper high limit switch terminals 1 and 2. If burner

operates normally, replace switch.

L. Noisy power venter. 1. Power venter wheel loose. 1. Replace or tighten.

2. Power venter wheel dirty. 2. Clean power venter wheel.

3. Power venter wheel rubbing

housing. 3. Realign power venter wheel.

4. Bearings are dry. 4. Oil bearings on power venter motor. (Refer to label on

motor.)

M. Pilot will not light or will not stay

lit. 1. Main gas off. 1. Open all manual gas valves.

Table 9. Troubleshooting guide (continued)

Symptoms Possible Cause(s) Corrective Action

Diagnostics

40 GLND-SVX01B-EN

2. Pilot adjustment screw turned too

low on combination/automatic

main gas valve.

2. Refer to “Operation,” p. 27.

3. Air in gas line. 3. Purge air from gas supply.

4. Incorrect lighting procedure. 4. Follow lighting instruction label adjacent to gas valve.

5. Dirt in pilot orifice. 5. Remove pilot orifice. Clean with compressed air or solvent.

(Do not ream.)

6. Extremely high or low gas

pressure. 6. Refer to “Operation,” p. 27.

7. Defective thermocouple (standing

pilot units only). 7. Check thermocouple connection, and replace if defective.

8. Drafts around unit. 8. Eliminate drafts. Refer to “Installation: Mechanical,” p. 11.

9. Pilot valve not opening (faulty

wiring). 9. Inspect and correct all wiring.

10. No spark (if applicable) (faulty

wiring). 10. Inspect and correct ignition system wiring. See symptoms

U, V, and W.

11. Defective gas valve. 11. Replace.

N. Power venter will not run. 1. Loose wiring. 1. Check and tighten all wiring connections per diagrams.

Thermostat wires tagged “W” and “G” must be connected

together (unless special thermostats are used; if so, see

thermostat wiring diagram, “Electrical Connections,” p. 25).

2. Defective motor overload

protector or defective motor. 2. Replace motor.

3. Defective power venter relay. 3. Check for 24V across 1 and 3 terminals on fan relay. If 24V

is present, jumper terminals numbered 2 and 4. If motor

runs, the fan relay is defective and must be replaced. If 24V

is not present, check wiring per diagrams.

O. Power venter motor turns on and

off while burner is operating. 1. Fan relay heater element

improperly wired. 1. Be sure venter relay heater terminals are connected per

diagrams.

2. Defective venter relay switch. 2. Replace venter relay.

3. Motor overload protector cycling

on and off. 3. Check motor amps against motor name plate rating, check

voltage, replace venter relay motor if defective.

4. Motor not properly oiled. 4. Refer to label on motor.

P. Power venter motor will not stop. 1. Improperly wired venter relay. 1. Check all wiring.

2. Main burners not lighting while

thermostat calls for heat. 2. Refer to H and N symptoms.

3. Defective venter relay. 3. Replace venter relay.

Q. Not enough heat. 1. Incorrect gas input. 1. Refer to “Operation,” p. 27.

2. Heater undersized. 2. This is especially true when the heated space is enlarged.

Have the heat loss calculated and compare to the heater

output (80 percent of input). Your gas supplier or installer

can furnish this information. If heater is undersized, add

additional heaters.

3. Thermostat malfunction. 3. Replace thermostat.

4. Heater cycling on limit control. 4. Check air movement through heat exchanger. Check

voltage to fan motor. Clean power venter blade and heat

exchanger and oil power venter motor.

5. Check outside dampers if used. 5. Adjust dampers accordingly.

R. Too much heat. 1. Thermostat malfunction. 1. Replace thermostat.

2. Heater runs continuously. 2. Check wiring per diagrams; check operation at valve. Look

for short (such as staples piercing thermostat wiring), and

correct; replace gas valve. Refer to “Operation,” p. 27.

S. Cold air is delivered on start up. 1. Fan relay heater element

improperly wired. 1. Be sure fan relay heater terminals are connected per

diagrams.

T. Cold air is delivered during heater

operation. 1. Incorrect manifold pressure or

input. 1. Refer to “Operation,” p. 27.

2. Voltage to unit too high. 2. Check motor voltage with fan running. Should be 115 volts

AC.

3. Air throughput too high. 3. Refer to “Operation,” p. 27.

Table 9. Troubleshooting guide (continued)

Symptoms Possible Cause(s) Corrective Action

Diagnostics

GLND-SVX01B-EN 41

U. No Spark. 1. Thermostat not calling for heat. 1. Close thermostat contacts.

2. No low voltage. 2. Check for 24V across 24V terminals of S8600.

3. Spark gap closed or too wide. 3. Set gap to 0.1.

4. Broken or cracked ceramic on

spark electrode. 4. Replace pilot assembly.

V. Spark present but pilot does not

light. 1. Loose S8600 connections. 1. Check all connections, term. PV feeds 24V to pilot valve.

2. Improper gas pressure. 2. Check pressure—pressure that is either too high or too low

may cause a problem.

3. Is spark in pilot gas stream? 3. Spark should arc from electrode.

4. No pilot gas — do not use match to

test - presence of gas is easily

detected by the odor.

4. Check pilot line for kinks. Ensure there are no drafts.

W. Pilot lights — Main valve does not

energize. 1. Loose S8600 connections. 1. Check connections-term. MV feeds main valve.

2. Cracked or broken sensor

ceramic. 2. Replace pilot assembly.

3. Check sensor/spark lead for

continuity. 3. Replace if needed.

4. Measure 24 volts from term. MV to

term. MV/PV. 4. If present, replace main valve; if not, replace S8600 Igniter.

X. Hi-Limit switch tripping 1. Vertical run of flue is too short.

(Standard unit only—as Category

I.)

1. Lengthen vertical run of flue pipe (see “Installation:

Venting,” p. 18).

2. Unit is overfiring. 2. Manifold pressure too high; adjust. Burner orifice may be

too large: verify/replace if required.

3. Air flow too low. 3. Increase air flow; check fan size. Check for proper voltage.

4. Defective switch. 4. Replace.

Table 9. Troubleshooting guide (continued)

Symptoms Possible Cause(s) Corrective Action

42 GLND-SVX01B-EN

Wiring Diagrams

Figure 25. Indoor Gas-Fired Duct Furnace

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the

leader in creating and sustaining safe, comfortable and energy efficient environments, Trane offers a broad

portfolio of advanced controls and HVAC systems, comprehensive building services, and parts.

For more information, visit www.Trane.com.

Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

We are committed to using environmentally

conscious print practices that reduce waste.

GLND-SVX01B-EN 16 Mar 2012

Supersedes GLND-SVX01A-EN (01 Mar 2010)

Trane Gas Unit Heaters Installation And Maintenance Manual GLND SVX01B EN 03/16/2012 Installation, Operation, Heater Indoor Fired Duct Furnace S GL

Navigation menu

Versions of this User Manual:

Views

Navigation