Trane Gas Unit Heaters Installation and Maintenance Manual

Page 1

Installation, Operation, and Maintenance

Gas Unit Heater

Tubular Gas-Fired Direct Spark Propeller Unit Heater

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.

March 2012 GTND-SVX01B-EN

Page 2

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 servici ng this unit.

ATT EN TI ON : Warnings, Cautions and Notices appear at

appropriate sections throughout this literature. Read these carefully:

WARNI NG

CAUTIONs

NOTICE:

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Indicates 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.

Indicates a situation that could result in equipment or property-damage only

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.

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.

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.

Page 3

WARN ING

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.

WARN ING

Overheating or Flooding Could Cause Fire or Explosion!

Overheating or flooding (where any part of the unit heater 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 unit heater before shutting off the electrical supply. Do not use the unit heater if any part has been under water. Immediately call a qualified service technician to inspect the unit heater and replace any gas control which has been underwater. Failure to follow these recommendations could result in death or serious injury.

Warnings, Cautions and Notices

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.

GTND-SVX01B-EN 3

Trademarks

Trane and the Trane logo are trademarks of Trane in the United States and other countries.

Page 4

Introduction

WARN ING

Safety Alert!

You MUST follow all recommendations below. Failure to do so could result in death or serious injury.

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. Do not try to light any appliance.

2. Do not touch electrical switches; do not use any phone in your building.

3. Immediately call your gas supplier from a neighbor instructions.

4. If you cannot reach your fire department.

Approved For Use in California

’s phone. Follow the gas supplier’s

gas supplier, call your

WARN ING

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.

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.

4 GTND-SVX01B-EN

Page 5

Table of Contents

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

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

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

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

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

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

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

Unit Dimensions and Weights . . . . . . . . . . . 12

Installation: Mechanical . . . . . . . . . . . . . . . . . 16

Air Distribution . . . . . . . . . . . . . . . . . . . . . 16

Clearances . . . . . . . . . . . . . . . . . . . . . . . . . 17

Nozzle Assembly . . . . . . . . . . . . . . . . . . . 19

Installation: Piping . . . . . . . . . . . . . . . . . . . . . . 21

Gas Supply Piping . . . . . . . . . . . . . . . . . . . . 21

Pipe Sizing . . . . . . . . . . . . . . . . . . . . . . . . 21

Pipe Installation . . . . . . . . . . . . . . . . . . . . . . 22

Installation: Venting . . . . . . . . . . . . . . . . . . . 23

Standard Combustion . . . . . . . . . . . . . . . 25

All Unit Sizes: Vertically Vented Unit Heaters

(Category I) . . . . . . . . . . . . . . . . . . . . . . . . 25

All Unit Sizes: Horizontally Vented Unit Heat-

ers (Category III) . . . . . . . . . . . . . . . . . . . . 26

Unit Sizes 30–120 Only: Vertically Vented Unit

Heaters (Category III) . . . . . . . . . . . . . . . . 28

Separated Combustion . . . . . . . . . . . . . . 32

Unit Sizes 30–120 Only: Category III . . . . 32

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . .46

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . .50

Installation: Electrical . . . . . . . . . . . . . . . . . . . 37

Electrical Connections . . . . . . . . . . . . . . . . . 37

Thermostat Wiring and Location . . . . . . 37

Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

All Unit Sizes: Operation . . . . . . . . . . . . . . . 39

Power Vented Propeller Units—Direct Spark

Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Gas Equipment Start-Up . . . . . . . . . . . . . . . 43

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Periodic Service . . . . . . . . . . . . . . . . . . . . 44

How to Order Replacement Parts . . . . . . 45

GTND-SVX01B-EN 5

Page 6

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

T = Tubular Heat Exchanger -

Propeller Type

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

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 011 = 105 MBh 030 = 300 MBh 120 = 120 MBh 035 = 350 MBh

040 = 400 MBh

Digit 8 — Main Power Supply

A = 115/60/1 D = 230/60/3 B = 230/60/1 E = 460/60/3 C = 208/60/3 F = 575/60/3

Digit 11 — Heat Exchanger Material

1 = Aluminized Steel 2 = #409 Stainless 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 B = Orifices For Elevation Above

2000 Feet (Specify Elevation) J = Totally Enclosed Motor 7 = OSHA Fan Guard

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

6 GTND-SVX01B-EN

Page 7

General Information

Description

The Tubular Gas-Fired Unit Heater is a factory assembled, power vented, low static pressure type propeller fan unit heater designed to be suspended within the space to be heated. THESE HEATERS ARE NOT TO BE CONNECTED TO

Figure 1. Tubular Propeller Unit Heaters

DUCTWORK. The designs are certified by ETL as providing a minimum of 80 percent thermal efficiency, and approved for use in California. Do not alter these units in any way. If you have any questions after reading this manual, contact the manufacturer.

Front view (Unit size 150) Rear view (Unit size 150)

General Safety Information

Important: This product must be installed by a licensed

plumber or gas fitter when installed within the Commonwealth of Massachusetts.

Safety Alert!

You MUST follow all recommendations below. Failure to do so could result in death or serious injury.

• 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

hese installation instructions are those that

in t 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.

Unit sizes 150–400: These units are designed for use in airplane hangars when installed in

See “Identification of Parts,” p. 8 for unit components.

accordance with ANSI/NFPA No. 409, and in public garages when installed in accordance with NFPA No. 88A and NFPA No. 88B.

Unit sizes 30–120: If installed in Canada, the installation must conform with local building codes, or in absence of local building codes,

WARNING

with CAN/CanGa-B149.1 “Installation Codes for Natural Gas Burning Appliances and Equipment” or CAN/CanGa-B149.2 “Installation Codes for Propane Gas Burning Appliances and Equipment”. These unit heaters have been designed and certified to comply with CSA 2.6.

Unit sizes 150–400: 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 unit heaters have been designed and certified to comply with CSA 2.6. Also see sections on installation in “Aircraft Hangers,” p. 16 and

“Public Garages,” p. 16.

• Do not alter the unit heater in any way or damage to the uni could occur!

t and/or severe personal injury or death

GTND-SVX01B-EN 7

Page 8

General Information

D4430

Fan Guard

Fan Blade

Hardware

Motor

• 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

void creating unsafe conditions. All wiring

a should be done and checked by a qualified electrician, using copper wire only.

• All gas connections shoul

d be made and leaktested by a suitably qualified individual, per instructions in this manual. Also follow procedures listed in “Gas Equipment Start-Up,”

p. 43.

• Use only the fuel for which the unit heater is gned (see rating plate). Using LP gas in a

desi 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 heater

or use with a fuel other than the one

f intended. Such conversion is dangerous, as it could create the risks listed previously.

• Make certain that the power source conforms to

he electrical requirements of the heater.

• All field-installed wiring must be completed by

ualified personnel. All field-installed wiring

q 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

ounding information pertaining to this heater.

gr To prevent the risk of electrocution, the heater must be securely and adequately grounded. This should be accomplished by connecting a grounded conductor between the service panel and the heater. To ensure a proper ground, the grounding means must be tested by a qualified electrician.

• Do not insert fingers or foreign objects into the

heater or its air mo

ving 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 heater is intended f

or general heating applications ONLY. It must NOT be used in potentially dangerous locations such as flammable, explosive, chemical-laden or wet atmospheres.

• Do not attach ductwork to this product or use it makeup air heater. Such usage voids the

as a warranty and will create unsafe operation.

• In cases in which property damage may result

om malfunction of the heater, a backup system

fr or a temperature sensitive alarm should be used.

• Should overheating occur, or the gas supply fail

to shut of

f, shut off the manual gas valve to the

heater before shutting off the electrical supply.

• The open end of piping system

s being purged must not discharge into areas where there are sources of ignition or into confined spaces UNLESS precautions are taken as follows: 1) by ventilation of the space, 2) control of purging rate, 3) elimination of all hazardous conditions. All precautions must be taken to perform this operation in a safe manner.

• 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 propertyonly-damage.

Unless otherwise specified, the following conversions may be used for calculating SI unit measurements:

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/m

1 cubic foot = 0.028 m

Identification of Parts

Figure 2. All unit sizes: Propeller parts

Note: With unit sizes 30 and 45, no rubber grommets are supplied.

8 GTND-SVX01B-EN

Page 9

Figure 3. Unit sizes 30–120: Unit parts

General Information

#Description

1. Vestible Panel/Tube Assembly (Heat Exchanger)

2. Bracket/Gas Train

3. Manifold

4. Burner Assembly

5. Standard Orifice Natural Gas or Propane (LP) Gas

6. Spark Ignitor

7. Flame Sensor

8. Gas Valve Natural or Propane (LP) Gas

9. Manual Rollout Safety Switch

10. Transformer, 50 VA, 115/24

11. Air Pressure Switch

12. Terminal Block Plate

13. High Limit Switch

14. Fan Motor

15. OSHA Fan Guard

16. Standard Fan

17. Fan/Guard/Motor Mount Hardware Kit

18. Flue Collector

19. Power Venter (Drafter) Assembly

20. Flue Collar Assembly

21. Vinyl Tubing (Pressure Switch)

22. Power Venter Mounting Plate

23. Louver

24. Louver Spring

25. Control Board

26. Access Panel

27. Top Jacket Panel w/Insulation

28. Bottom Jacket Panel w/Insulation

29. Front Jacket Panel

30. Rear Jacket Panel

31. Bracket, Manifold

32. Tube Support Bracket

33. Green Ground Screw

34. Hanger Bracket

35. Manifold Clamp

36. Pipe Nipple

37. Left Side Panel

38. Manifold Support Bracket Kit

39. Spring

40. Grommet

41. Inlet Screen Assembly

42. Burner Box View Port

(b)

(a)

(a)The orifice shown are for units operating at normal altitudes of 0 to 2000 ft (610 m). (b)When replacing a flue collector, make sure that the flue collector box is sealed completely with factory supplied gasket.

GTND-SVX01B-EN 9

Page 10

General Information

D03

Figure 4. Unit sizes 30–120: Component parts

Pressure switch Gas valve

Figure 5. Unit sizes 30–120: Internal furnace

components

Figure 6. Unit sizes 30–120: Power venter assembly

Figure 7. Unit sizes 150–400: Component parts

10 GTND-SVX01B-EN

Page 11

General Information

Figure 8. Unit sizes 150–400: Heat exchanger

assembly

Figure 9. Unit sizes 150–400: Electrical control panel

Figure 10. Unit sizes 150–250: Power venter assembly

Figure 11. Unit sizes 300–400: Power venter assembly

Figure 12. Unit sizes 150–400: Turbulator/High limit

location

GTND-SVX01B-EN 11

Page 12

Unit Dimensions and Weights

Ta b le 1. Unit sizes 30–120: Performance and specification data

Unit Size 30 45 60 75 90 105 120 PERFORMANCE DATA

Input Btu/h 30,000 45,000 60,000 75,000 90,000 105,000 120,000 (kW) (8.8) (13.2) (17.6) (22.0) (26.4) (30.8) (35.2) Output Btu/h 24,900 37,350 49,800 61,500 73,800 86,100 98,400 (kW) (7.2) (10.9) (14.5) (18.0) (21.6) (25.2) (28.8) Thermal Efficiency %83838382828282 Free Air Delivery CFM cfm 370 550 740 920 1,100 1,300 1,475 (m Air Temperature Rise °F 60 60 60 60 60 60 60 (°C) (15) (15) (15) (15) (15) (15) (15) Full Load Amps at 115V 3.0 3.0 4.1 4.1 6.4 6.4 6.4 Maximum Circuit Ampacity 3.5 3.5 4.8 4.8 7.5 7.5 7.5

MOTOR DATA:

Motor hp 1/20 1/20 1/12 1/12 1/10 1/10 1/10

Type SP SP SP SP SP SP SP RPM 1650165010501050105010501050 Amps @ 115V 1.9 1.9 2.6 2.6 4.2 4.2 4.2

DIMENSIONAL DATA

“A” Jacket Height in. 12-3/8 12-3/815-7/815-7/822-5/822-5/822-5/8

“B” Overall Height in. 13-1/4 13-1/4 16-13/16 16-13/16 23-9/16 23-9/16 23-9/16

“C” Overall Depth in. 25-7/8 25-7/8 26-3/16 26-3/16 26-3/8 26-3/8 26-3/8

“D1” Center Line Height of Flue

“D2” Center Line Height of Air Intake in. 8-1/2 8-1/2 8 8 8-5/8 8-5/8 8-5/8

“E” Fan Diameter in.10101414161616

“F” Discharge Opening Height in. 10-13/16 10-13/16 14-7/16 14-7/16 21-3/16 21-3/16 21-3/16

“G” Vent Connection Diameter in. 4 4 4 4 4 4 4

“H1” Center Line of Flue Connection From Side in. 7-1/4 7-1/4 7-1/4 7-1/4 7-3/4 7-3/4 7-3/4

“H2” Center Line of Air Intake From Side in. 2-3/4 2-3/4 2-3/4 2-3/4 3-1/2 3-1/2 3-1/2

Vent Size Requirements - Standard Combustion Category I Horizontal

Category III Horizontal in.4444444

Category I & III Vertical in.4444444

Vent Size Requirements - Separated Combustion Exhaust Diameter** in.4444555

Intake Air Diameter in.4444555

Unit Weight lb 60 65 80 85 95 105 110

Shipping Weight lb 70 75 90 95 110 115 120

(a) Ratings shown are for unit installations at elevations between 0 and 2000 ft. (610 m). For unit installations in USA above 2000 ft. (610 m), the unit

input must be derated 4% for each 1000 ft. (305 m) above sea level; refer to local codes, or in absence of local codes, refer to the latest edition of the National Gas Code, ANSI Standard Z223.1 (N.F.P.A. No. 54). Also refer to Table 10, p. 42. For installations in Canada, any reference to deration at altitudes in excess of 2000 ft. (610 m) are to be ignored. At altitudes of 2000 to 4500 ft. (610

to 1372 m), the unit must be derated to 90% of the normal altitude rating, and be so marked in accordance with the ETL certification. (b)For all installations, the flue collar is included with the unit and should be field-installed per the instructions included with the unit. (c) 4”–5” reducer supplied where required.

(a)

/s) (0.175) (0.260) (0.349) (0.434) (0.519) (0.614) (0.696)

(kW) (0.04) (0.04) (0.06) (0.06) (0.075) (0.075) (0.075)

(mm) (314) (314) (403) (403) (574) (574) (574)

(mm) (337) (337) (427) (427) (598) (598) (598)

(b)

(c)

(mm) (632) (632) (665) (665) (670) (670) (670) in. 8-1/2 8-1/2 10-3/8 10-3/8 13-5/8 13-5/8 13-5/8 (mm) (216) (216) (263) (263) (346) (346) (346)

(mm) (216) (216) (203) (203) (219) (219) (219)

(mm) (254) (254) (356) (356) (406) (406) (406)

(mm) (275) (275) (367) (367) (538) (538) (538)

(mm) (102) (102) (102) (102) (102) (102) (102)

(mm) (184) (184) (184) (184) (197) (197) (197)

(mm) (70) (70) (70) (70) (89) (89) (89)

in.4445555 (mm) (102) (102) (102) (127) (127) (127) (127)

(mm) (102) (102) (102) (102) (102) (102) (102)

(mm) (102) (102) (102) (102) (127) (127) (127)

(kg) (27) (29) (36) (39) (43) (48) (50)

(kg) (32) (34) (41) (43) (50) (52) (54)

12 GTND-SVX01B-EN

Page 13

Figure 13. Unit sizes 30–120: Dimensions, standard units

Unit Dimensions and Weights

GTND-SVX01B-EN 13

Page 14

Unit Dimensions and Weights

Table 2. Unit sizes 150–400: Performance and specification data

Unit Size 150 175 200 250 300 350 400 PERFORMANCE DATA

Input Btu/h 150,000 175,000 200,000 250,000 300,000 350,000 400,000 (kW) (43.9) (51.2) (58.6) (73.2) (87.8) (102.5) (117.1) Output Btu/h 124,500 145,250 166,000 207,500 249,000 290,500 332,000 (kW) (36.4) (42.5) (48.6) (60.7) (72.9) (85.1) (97.2) Thermal Efficiency %83838383838383 Free Air Delivery CFM cfm 2,400 2,850 3,200 3,450 5,000 5,600 5,800 (m Air Temperature Rise °F 47 46 47 54 45 47 51 (°C) (26) (26) (26) (30) (24) (26) (28) Full Load Amps at 115V 5.8 8.0 8.0 8.0 11.3 13.5 13.5

MOTOR DATA:

Motor hp 1/4 1/3 1/3 1/3 1/4 (2) 1/3 (2) 1/3 (2)

Type PSC PSC PSC PSC PSC PSC PSC

RPM 1,140 1,140 1,140 1,140 1,140 1,140 1,140 Amps @ 115V 4.7 5.8 5.8 5.8 9.4 11.6 11.6

DIMENSIONAL DATA

“A” Overall Height to Top of Flue in. 33-3/4 33-3/4 33-3/4 33-3/4 34 34 34

“B” Jacket Width of Unit in. 20-3/4 32-3/4 32-3/4 32-3/4 50-3/4 50-3/4 50-3/4

“C” Width to Centerline Flue in. 13-3/8 19-3/8 19-3/8 19-3/8 28-3/8 28-3/8 28-3/8

“D” Depth to Rear of Housing in. 11 11 11 11 12-1/4 12-1/4 12-1/4

“E” Hanging Distance Width in. 18-5/8 30-5/8 30-5/8 30-5/8 48-5/8 48-5/8 48-5/8

“F” Discharge Opening Width in. 18-3/4 30-3/4 30-3/4 30-3/4 48-3/4 48-3/4 48-3/4

“G” Depth to Centerline Flue in. 4-3/4 4-3/4 4-3/4 4-3/4 5-1/8 5-1/8 5-1/8

“H” Discharge Opening Height in. 24-1/2 24-1/2 24-1/2 24-1/2 24-1/2 24-1/2 24-1/2

“L” Overall Unit Width in. 25-1/4 37-1/4 37-1/4 37-1/4 55-1/4 55-1/4 55-1/4

Flue Size Diameter

Fan Diameter in. (Qty)1618181816 (2)18 (2)18 (2) Gas Inlet-Natural Gas in.1/21/21/23/43/43/43/4 Gas Inlet-LP Gas in. 1/2 1/2 1/2 Approx. Unit Weight lb 155 191 201 211 307 321 335

Approx. Ship Weight lb 195 241 251 261 367 381 395

(a) Ratings shown are for unit installations at elevations between 0 and 2000 ft. (610 m). For unit installations in USA above 2000 ft. (610 m), the unit

input must be derated 4% for each 1000 ft. (305 m) above sea leve l; refer to local cod es, or in absence of local codes, refe r t o the latest edition of the

National Gas Code, ANSI Standard Z223.1 (N.F.P.A. No. 54).

For installations in Canada, any reference to deration at altitudes in excess of 2,000 ft. (610 m) are to be ignored. At altitudes of 2,000 ft. to 4,500 ft.

(610 m to 1372 m), the unit must be derated to 90% of the normal altitude rating, and be so marked in accordance with the ETL certification. (b)Flue collar is factory-supplied with unit; to be field-installed per included instructions.

(a)

/s) (1.133) (1.346) (1.511) (1.629) (2.361) (2.644) (2.738)

(kW) (0.19) (0.25) (0.25) (0.25) (0.19) (0.25) (0.25)

(mm) (857) (857) (857) (857) (864) (864) (864)

(mm) (527) (831) (831) (831) (1289) (1289) (1289)

(mm) (340) (492) (492) (492) (721) (721) (721)

(mm) (279) (279) (279) (279) (311) (311) (311)

(mm) (473) (778) (778) (778) (1235) (1235) (1235)

(mm) (476) (781) (781) (781) (1238) (1238) (1238)

(mm) (121) (121) (121) (121) (130) (130) (130)

(mm) (622) (622) (622) (622) (622) (622) (622)

(b)

(mm) (641) (946) (946) (946) (1403) (1403) (1403) in.5555666 (mm) (127) (127) (127) (127) (152) (152) (152)

1/2 or 3/4

(kg) (70) (87) (91) (96) (139) (145) (152)

(kg) (88) (109) (114) (118) (166) (173) (179)

14 GTND-SVX01B-EN

Page 15

Figure 14. Unit sizes 150–400: Dimensions, standard units

(Hanging)

1-3/8"

(35)

(Hanging)

32-1/2"

(826)

11-5/8"

(295)

(Hanging)

(Discharge

Opening)

33"

(Discharge Opening)

1" (25)

Electrical Control Panel

Gas Valve

D4617

Rear View Side View Front View

Flue *

Unit Dimensions and Weights

GTND-SVX01B-EN 15

Page 16

Installation: Mechanical

NOTICE:

Equipment Damage!

Do not install unit heaters 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. Unit heaters 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!

Since the unit is equipped with an automatic gas ignition system, the unit heaters must be installed such that the gas ignition control system is not directly exposed to water spray, rain, or dripping water.

Additional Requirement for Canadian Installations

Refer to specification table and installation manual for proper usage.

The following instructions apply to Canadian installations in addition to installation and operating instructions:

1. Installation must conform with local building codes, or in the 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 reference to U. S. standards or codes in these instructions are to be ignored, and the applicable Canadian standards or codes applied.

Note: Location of unit heaters is related directly to the

selection of sizes. Basic rules are as follows:

Mounting Height. Mounting height varies by unit size:

Unit sizes 30–120: If the unit heater is installed in a garage, it must be installed with a minimum clearance above the floor of 18 inches (457 mm).

Unit sizes 150–400: Unit heaters equipped with standard fan guards must be installed at a minimum of 8 feet (2.4 m) above the floor, measured to the bottom of the unit. At heights above 8 feet (2.4 m), less efficient air distribution will result. If a unit is to be mounted below 8 feet (2.4 m) from the floor, an OSHA approved fan guard is required on the unit.

Canada, installation is suitable in aircraft hangars when acceptable to the enforcing authorities.

Public Garages. Unit sizes 150–400: In repair garages,

unit heaters must be located at least 8 feet (2.4 m) above the floor. Refer to the latest edition of NFPA 88B, Repair Garages.

In parking structures, unit heaters 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. However, any unit heater mounted in a parking structure less than 8 feet (2.4 m) above the floor must be equipped with an OSHA approved fan guard. 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.”

Air Distribution

Direct air towards areas of maximum heat loss. When multiple heaters are involved, circulation of air around the perimeter is recommended where heated air flows along exposed walls. Satisfactory results can also be obtained where multiple heaters are located toward the center of the area with heated air directed toward the outside walls. Be careful to avoid all obstacles and obstructions which could impede the warm air distribution patterns.

NOTICE:

Maintain Minimum Thermostat Setting!

Unit heaters 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 unit heaters 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 unit heater onto the floor surface. Additional unit heaters 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.

Aircraft Hangers. Unit sizes 150–400: Unit heaters must

be installed in aircraft hangars as follows: in aircraft hangars, unit heaters 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

16 GTND-SVX01B-EN

Page 17

WARN ING

Overheating or Flooding Could Cause Fire or Explosion!

WARN ING

Hazardous Gases and Flammable Vapors!

Air for Combustion. The unit heater shall be installed in

a location in which the facilities for ventilation permit satisfactory combustion of gas, proper venting, and the maintenance of ambient temperature at safe limits under normal conditions of use. The unit heater shall be located in such a manner as not to interfere with proper circulation of air within the confined space. When buildings are so tight that normal infiltration does not meet air requirements, outside air shall be introduced per Sections

1.3.4.2 and 1.3.4.3 of ANSI Z223.1 for combustion

requirements. A permanent opening or openings having a total free area of not less than one square inch per 5,000 Btu/h (1.5 Kw) of total input rating of all appliances within the space shall be provided.

Note: Unit heater sizing should be based on heat loss

calculations where the unit heater output equals or exceeds heat loss.

Clearances

Each gas unit heater shall be located with respect to building construction and other equipment so as to permit access to the Unit Heater.

Unit sizes 30–120: Clearance between vertical walls and the vertical sides of the unit heater shall be no less than 1 inch (25.4 mm). However, to ensure access to the control box and fan, a minimum of 18 inches (457 mm) is required for the fan, and control box side. A minimum clearance of 1 inch (25.4 mm) must be maintained between the top of

Installation: Mechanical

the Unit Heater and the ceiling. The bottom of the Unit Heater must be no less than 1 inch (25.4 mm) from any combustible. The distance between the flue collector and any combustible must be no less than 1 inch (25.4 mm).

Unit sizes 150–400: Clearance between vertical walls and the vertical sides of the unit heater shall be no less than 6 inches (152 mm). However, to ensure access to the control box, a minimum of 18 inches (457 mm) is required for the control box side. A minimum clearance of 6 inches (152 mm) must be maintained between the top of the unit heater and the ceiling. The bottom of the unit heater must be no less than 12 inches (305 mm) from any combustible. The distance between rear of unit and vertical wall should be no less than 18 inches to maintain inlet air flow. The distance between the flue collector and any combustible must be no less than 6 inches (152 mm).

Also refer to “Air for Combustion,” p. 17 and “Installation:

Venting,” p. 23 sections.

Note: Increasing the clearance distances may be

necessary if there is a possibility of distortion or discoloration of adjacent materials.

Unit Mounting.

WARNI NG

Heavy Objects!

Make certain that the lifting methods used to lift the heater and the method of suspension used in the field installation of the heater are capable of uniformly supporting the weight of the heater at all times. Make certain that the structure to which the heater is mounted is capable of supporting its weight. Under no circumstances must the gas lines, the venting system or the electrical conduit be used to support the heater; or should any other objects (i.e. ladder, person) lean against the heater, gas lines, venting system or the electrical conduit for support. Failure to follow recommendations could result in death or serious injury.

NOTICE:

Equipment Damage!

Unit heaters must be hung level from side to side and from front to back:

• Unit sizes 30–120: Refer to Figure 15, p. 18 through

Figure 17, p. 18.

• Unit sizes 150–400: Refer to Figure 18, p. 19 through

Figure 20, p. 19.

Failure to do so will result in poor performance and or premature failure of the unit.

GTND-SVX01B-EN 17

Page 18

Installation: Mechanical

WARNING

Heavy Objects!

Ensure that all hardware used in the suspension of each unit heater 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.

Unit sizes 30–120 only: The unit heater may be mounted with the vent outlet, gas and electrical connections to the right or left of the air moving fan. The unit heater is shipped with the connections to the right of the fan when looking in the direction of the air flow. If connections to the right are required, remove hanger brackets from face of unit and attach as pictured in Figure 15, p. 18. If connections to the left are required, invert the heater (180°), mount the hanging brackets as above, and remove, invert, and replace the control access panel and the air discharge louvers.

The unit heater may be mounted by fastening the hanging brackets directly to ceiling joists or by suspending from four rods (see Figure 15, p. 18 through Figure 17, p. 18).

For suspension of units, refer to the figures:

• Unit sizes 30–120: Refer to Figure 15, p. 18 through

Figure 17, p. 18.

• Unit sizes 150–400: Refer to Figure 18, p. 19 through

Figure 20, p. 19.

Figure 16. Unit sizes 30–120: Heater mounting (steel

construction)

Figure 17. Unit sizes 30–120: Heater mounting (wood

construction)

Figure 15. Unit sizes 30–120: Hanger bracket

installation instructions

18 GTND-SVX01B-EN

Page 19

Installation: Mechanical

Figure 18. Unit siz

es 150–400: Flue collar adapter

installation

Figure 19. Unit sizes 150–400: Heater mounting

(a) All hanging hardware and wood is not included with the unit (to be field sup-

plied).

(a)

Figure 20. Unit sizes 150–400: Wood construction joists

to temporarily attach the top bracket (P/N 252-07948-00X).

a. Using the holes in the top brac

ket as a guide, predrill 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) 5/16-1

2 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 brac

ket and the two (2)

side panels.

Note: Th

e 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: Th

e 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.

Note: See Table 2, p. 14 for “E” dimension.

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

GTND-SVX01B-EN 19

or 30-degree nozzle assemblies: Go to Step 10.

7. F

or 60- and 90-degree nozzle assemblies: Using the

8. F enclosed #8-18 x 1/2 screws and with the top and bottom panels oriented such that the sides with the

Page 20

Installation: Mechanical

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 th (P/N 251-07947).

Note: Th

e 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.

e right side panel

10. Install the louvers and cone springs.

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

to create a second sub-assembly.

or 60- and 90-degree nozzle assemblies: Using the

9. F enclosed #8-18 x 1/2 screws, attach the sub-assembly created in Step 8 to the 30-degree assemb 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: F

or 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).

ly installed to

20 GTND-SVX01B-EN

Page 21

Installation: Piping

Gas Supply Piping

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.

Pipe Sizing

To provide adequate gas pressure at the gas unit heater, size the gas piping as follows:

1. Find the ft

/hr by using the following formula:

/hr =

2. Refer to Ta b le 3, p. 22. Match “Length of Pipe” with appropriate “Gas Input - Ft 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 unit heater to a 1,000 Btu/ft

200,000 Btu/hr 1,000 Btu/ft

Using Table 3, p. 22, a 1-inch pipe is needed.

Notes:

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

(metric) unit conversion factors.

• If more than one gas unit heater 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 unit heater is to be fired with LP gas, consult the local LP gas dealer for pipe size information.

Btu per ft

Input

= 200 ft3/hr

/Hr” value. This value can

(0.29 kW) natural gas supply.

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.

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.

GTND-SVX01B-EN 21

Page 22

Installation: Piping

Table 3. All unit sizes: Gas pipe size

Nominal Iron Pipe Size, in.

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

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

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

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

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

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

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

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

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

Notes:

1. Determine the required ft unit input (kW) by 0.0965 to determine m

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

3. FOR PROPANE GAS: Multiply the ft

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

Internal Diameter, in. (mm)

(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)

(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)

(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)

(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)

(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)

(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)

(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)

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

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

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)

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

/h.

/h (m3/h) value by 0.633; then use the table.

Length of Pipe, ft (m)

Pipe Installation

1. Install the gas piping in accordance with applicable local codes.

2. Check gas supply pressure. Each unit heater must be connected to a gas supply capable of supplying its full rated capacity as specified in Tab le 4, p. 23. A field LP tank regulator must be used to limit the supply

essure to maximum of 14 in. wc (3.5 kPa). All piping

pr should ANSI Standard Z223.1 National Fuel Gas Code; in Canada, according to CSA-B149.

Unit sizes 150–400: Unit siz connected to a manifold pressure.

If gas pressure is excessive on natural gas applications, install a pressure regulating valve in the line upstream from the main shutoff valve.

For correct gas supply piping size, refer to the tables:

• Unit sizes 30–120: Refer to Table 1, p. 12.

• Unit sizes 150–400: Refer to Table 2, p. 14.

• All unit sizes: Refer to Table 3, p. 22, Table 4, p. 23,

be sized in accordance with the latest edition of

es 150–400 must also be

Table 9, p. 41, and Table 10, p. 42.

If gas pressure is excessive on natural gas applications, install a pressure regulating valve in the line upstream from the main shutoff valve.

WARNI NG

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-onlydamage.

3. To prevent the mixing of moistur take-off piping from the top, or side, of the main.

4. Standard unit heaters (all unit siz stage units (unit sizes 150–400) are supplied with a combination valve which includes:

a. Manual “A” valve

Manual “B” valve

c. Solenoid valve

d. Pressure regulator

e with gas, run the

es) and optional two-

22 GTND-SVX01B-EN

Page 23

Installation: Piping

D 3 6 31 C

Pipe directly in to combination valve (see Figure 21,

p. 23).

5. Gas valve has a pressure test post requiring a 3/32” hex head wrench to read gas supply and manifold pressures. Open 1/4 turn counterclockwise to read, turn clockwise to close and reseat. A 5/16” ID hose fits the pressure post.

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

eater. A ground joint union and a manual gas shutoff

h 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 21, p. 23).

7. Make certain that all co

nnections have been

adequately doped and tightened.

NOTICE:

Overtightening!

Do not overtighten the inlet gas piping into the valve. This may cause stresses that could crack the valve!

Note: Use pipe joint sealant resistant to the action of

liquefied petroleum gases regardless of gas conducted.

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-onlydamage.

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).

Table 4. All unit sizes: Gas piping requirements

Gas Type Natural Gas Propane (LP) Gas

Single Stage Gas Piping Requirements

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)

(a)For single stage applications only, at altitudes below 2,001 feet. (b)For single stage applications only, at normal altitudes

(b)

(a)

Installation: Venting

All unit heaters must be vented!

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.

Figure 21. All unit sizes: Pipe installation, standard

controls

WARNING

Risk of Fire and Carbon Monoxide Poisoning with Improper Piping!

Never use a pipe of diameter other than that specified:

• Unit sizes 30–120: Use 4” (120 mm) flue pipe.

• Unit sizes 150–400: Refer to Table 2, p. 14!

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

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).

GTND-SVX01B-EN 23

restriction, an elbow should never be attached directly to the venter. Failure to follow these recommendations could result in death or serious injury or equipment damage.

ANSI now organizes vented appliances into four categories.

Page 24

Installation: Piping

Table 5. All unit sizes: Venting categories

Non Condensing Condensing

Negative Vent Pressure I II Positive Vent Pressure III IV

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.

When an existing heater is removed or replaced in venting system, the venting system may not be properly sized to vent the attached appliances. An improperly sized vent system can cause formulation of condensate or leakage or spillage of flue gases.

The following steps shall be followed with each appliance connected to the venting system placed in operation, while any other appliances connected to the venting system are not in operation:

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1 and these instructions. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies, which could cause an unsafe condition.

3. Insofar as practical, close all building doors and

ndows and all doors between the space in which the

wi appliance(s) connected to the venting system are located and other spaces of the building. Turn on clothes dryers and any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace damper.

4. Follow the lighting instructions. Pla being inspected in operation. Adjust thermostat so that the appliance will operate continuously.

5. After it has been determined that e connected to the venting system properly vents when tested as outline above, return doors, windows,

ce the appliance

ach appliance

exhaust fans, fireplace dampers, and any other gasburning appliance to their previous condition of use.

6. If improper venting is observed during any of the bove tests, the venting system must be corrected

a immediately so that the system conforms with the National Fuel Gas Code, ANSI Z223.1. When resizing any portion of the venting system, the venting system should be resized to approach the minimum size as determined using the appropriate tables in Appendix G of the National Fuel Gas Code, ANSI

.1.

Z223

The unit heater shall be connected to a factory built

himney or vent complying with a recognized standard, or

c a masonry or concrete chimney lined with a lining material acceptable to the authority having jurisdiction. Venting into an unlined masonry chimney is prohibited.

The following guidelines apply to all categories to follow:

Table 6. Unit sizes 30–120: Vent systems termination

clearance requirements

Structure

Door, window or any gravity vent inlet

Forced air inlet within 10 feet 3 feet above Adjoining building or parapet 6 feet Adjacent public walkways 7 feet above grade Electric, gas meters & regulators 4 feet horizontal

Minimum for Termination Locations

4 feet below 4 feet horizontally 1 foot above

Do not damper or add heat recovery devices to the flue piping. Failure to open such a damper prior to operating the gas unit heater will result in the spillage of flue gas into the occupied space.

Avoid installing units in areas under negative pressure. When required, a flue vent fan should be installed in accordance with the instructions included with the fan.

Vent connectors serving Category I and Category II heaters shall not be connected into any portion of mechanical draft systems operating under positive vent pressure.

Maintain 1-inch (25.4-mm) clearance between the vent pipe and combustible materials.

24 GTND-SVX01B-EN

Page 25

Installation: Piping

Standard Combustion

All Unit Sizes: Vertically Vented Unit

Heaters (Category I)

WARNING

Carbon Monoxide!

Never operate unit heaters without combustion air and flue gas piping in place. Each unit heater 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.

WARNING

Risk of Fire and Carbon Monoxide Poisoning with Improper Piping!

Never use a pipe of diameter other than that specified:

• Unit sizes 30–120: Use 4” (120 mm) flue pipe.

• Unit sizes 150–400: Refer to Table 2, p. 14!

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 these recommendations could result in death or serious injury or equipment damage.

Observe the following precautions when venting the unit:

1. Use flue pipe of the same size as the flue connections on the gas unit heater:

• Unit sizes 30–120: Use 4” (120 mm) flue pipe.

• Unit sizes 150–400: Refer to Table 2, p. 14.

All heaters must vented with UL Listed Type B vent (or, for unit sizes 30–120, single wall vent), a factory built

chimney, or a lined brick and mortar chimney that has been constructed in accordance with the National Building Code.

Unit sizes 30–120: All tables and dimensions assume B vent for the flue and single wall pipe or B vent for the connector.

2. Unit sizes 30–120: Unit may be common vented when installed in accordance with NFPA-54 guidelines.

3. Provide as long a vertical run o heater as possible. A minimum of 5 feet (1.5 m) of

tical flue is required for Category I venting. The top

ver of the vent pipe should extend at least 2 feet (0.61 m)

ve the highest point on the roof. Consideration

abo should be made for anticipated snow depth.

f flue pipe at the gas unit

Unit sizes 150–400: In Metalbestos vent cap over the vent opening.

4. Slope horizontal runs upward from at least 1/4-inch per foot (21-mm/m) minimum. Horizontal Vent Connector length should not exceed 75% of the vertical height of the vent pipe, or chimney, above the flue pipe connection. Maximum vent connector length is 10 feet (3 m). For exceptions see Ch. 10 of the National Fuel Gas Code, ANSI Z223.1.

ontal portions of the venting system shall be

Horiz supported at maximum intervals of 4 feet (1.2 m): see

Figure 22, p. 26; in Canada, support at 3-foot intervals

(1-m) minimum intervals. Maintain clear the vent pipe and combustible materials per vent pipe manufacturer’s instructions.

5. Use as few elbows as possible.

6. Seal all vent pipe joints and se Use General Electric RTV-108, Dow-Corning RTV-732, or equivalent silicone sealant with a temperature rating of 500°F, or 3M #425 aluminum foil equivalent). Tape flue pipe joints with high-temp, RTV or foil face tape.

7. Avoid running vent pipe through unheated spaces.

en this cannot be avoided, insulate the pipe to

Wh prevent condensation of moisture on the walls of the pipe. Insulate vent pipe runs longer than 10 ft (3 m).

sulation should be a minimum of 1/2” (12.7 mm)

In thick foil faced.

8. Do not damper the flue piping. Failure to open such a

amper prior to operating the gas unit heater will result

d in the spillage of flue gas into the occupied space.

9. Avoid installing units in areas under negative pressure

e to large exhaust fans or air conditioning. When

du required, a flue vent fan should be installed in accordance with the instructions included with the fan.

10. Vent connectors serving Category I and Category II

eaters shall not be connected into any portion of

h mechanical draft systems operating under positive pressure.

stall an Amerivent Americap or

the gas unit heater

ance between

ams to prevent leakage.

tape (or

GTND-SVX01B-EN 25

Page 26

Installation: Piping

Unit sizes 30–120: 1” (25.4 mm) minimum

distance from pipe to ceiling

Unit sizes 150–400: 6” (152 mm)

minimum distance from pipe to ceiling

2 feet Min.

(0.61 m Min.)

5 feet Min.

1.52 m Min.

Approved Vent Terminal

Use Insulated Stack Outdoors

Thimble

Roof

1/4” Min. (6 mm)*

1 foot

(305 mm)*

10 feet Max. (3.05 m)

(Not to exceed 75% of Vertical

Flue Height)

*1/4” per foot (21 mm per m)

Figure 22. All unit sizes: Vertical venting (Category I)

All Unit Sizes: Horizontally Vented Unit

Heaters (Category III)

WARNI NG

Risk of Carbon Monoxide Poisoning with

WARN ING

Carbon Monoxide!

Unit sizes 150–400: Horizontal venting arrangements are designed to be used with single wall vent pipe. Horizontal venting arrangements must terminate external to the building using either single wall or double wall (Type B) vent. If single wall vent pipe is used, it must be constructed of 26-gauge galvanized steel or a material of equivalent durability and corrosion resistance for the vent system. For installations in Canada, use corrosion-resistant and gas-tight, listed vent pipe conforming with local building codes, or in the absence of local building 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”. Refer to Figure 26, p. 28, Figure 28, p. 30, and Figure 30, p. 31 for special installation requirements regarding these venting conditions.

26 GTND-SVX01B-EN

Type B Vent!

Unit sizes 150–400: 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.

Unit sizes 150–400: 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.

Ta b l e 7. All unit sizes: Vent systems termination

Structure

Door, window or any gravity vent inlet

Forced air inlet within 10 feet 3 feet above Adjoining building or parapet 6 feet Adjacent public walkways 7 feet above grade

Observe the following precautions when venting the unit:

1. Use flue pipe of the same size as the flue connection(s) on the gas unit heater:

clearance requirements

Minimum for Termination Locations

4 feet below 4 feet horizontally 1 foot above

Page 27

Installation: Piping

• Unit sizes 30–120: Use 4” (120 mm) flue pipe.

• Unit sizes 150–400: Refer to Table 2, p. 14.

All heaters must be vented with a single or double wall pipe listed for Category III positive pressure vent systems.

Unit sizes 30–120: Double wall pipe can be used with limitations as shown in Figure X. As illustrated, a single 5 foot (1.52 m) section of double wall vent pipe with a draft hood connector may be used between the appliance vent connection and the vent terminal.

2. Each unit must have an individual vent pipe and vent terminal! Unit MUST NOT be connected to other vent systems or to a chimney.

3. The maximum equivalent length of vent pipe must not

exceeded:

• Unit siz

maximum of 40 feet (12.19 m) equivalent length of vent pipe; equivalent length is the total length of straight sections PLUS 5 feet (1.5 m) for each 90° elbow and 2.5 feet (0.75 m) for each 45° elbow.

• Unit sizes 150–400: The vent pipe equivalent length

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° elbow and 8 feet (2.44 m) for each 45° elbow.

4. Seal all vent pipe joins and seams to prevent leakage.

se General Electric RTV-108, Dow-Corning RTV-732,

U or equivalent silicone sealant with a temperature rating of 500°F (see Figure 25, p. 28). Attach the draft hood connector to the appliance vent connection with screws (3 minimum) and seal the joint with sealant. Install a vent thimble in the wall. Insert the vent pipe through the thimble and attach it to the adapter on the appliance. Seal the joint with silicone sealant or two wraps of aluminum foil tape. Install a vent cap on the outlet pipe and secure with screws (3 minimum).

Unit sizes 30–120: I wall vent pipe, seal the annular space between the inner and outer sections of the draft hood connector with a high temperature silicone sealant.

5. A vent cap must be supplied by the customer for each power vented

Unit sizes 30–120: Metalbestos vent cap. The vent pipe diameter must be 4”.

Unit sizes 150–400: Use a Breidert Type L, Fields Starkap, or equivalent vent cap. The the vent pipe diameter must be as specified in Table 2, p. 14. These unit sizes are factory equipped with the required flue size collar; attach in place (if not mounted to outlet); refer to included vent collar instruction sheet for additional requirements.

6. Through the wall venting for these appliances shall not term the condensate or vapor could create a nuisance,

es 30–120: Category III units are limited to a

silicone

f using a single section of double

unit:

Use an Amerivent Americap or

inate over public walkways, or over an area where

hazard, or could be detrimental to the operation of regulators, relief valves, or other equipment:

• Unit sizes 30–120: Refer to Figure 23, p. 28,

• Unit sizes 150–400: Refer to Figure 26, p. 28.

• All unit sizes: Ref er to Figure 28, p. 30 and Figure 30,

p. 31.

7. The venting system for these appliances shall ter

minate at least 4 feet (1.2 m) below, 4 feet (1.2 m) rizontal from, or 1 foot (0.3 m) above any door,

ho window, or gravity vent air inlet into the building.

8. Vent terminal:

Unit sizes 30–120: Th with a minimum horizontal clearance of 4 feet (1.2 m) from electrical meters, gas meters, regulators, and relief equipment.

Unit sizes 150–400: The vent terminal must be at least 3 feet (1 m) above grade, or in snow areas, at least 3 feet above the snow line to prevent blockage by snow.

9. The vent terminal must be at least 12 inches (305 mm) from the prevent degradation of the building materials by flue gasses.

10. Un with a minimum horizontal clearance of 4 feet (1.2 m) from equipment.

11. Maintain clearance between the combustible materials according to vent pipe manufacturer’s instructions.

12. Seal all vent pipe joints and se Use General Electric RTV-108, Dow-Corning RTV-732, or equivalent silicone sealant with a temperature rating of 500°F, or 3M #425 aluminum foil equivalent). The vent system must be installed to prevent collection of condensate. Pitch horizontal pipes downward 1/4 inch per foot (21 mm per meter) tow

Unit sizes 30–120: Install a tee at the low point of the pipe (see Figure 23, p. 28). As an alternate, a 3/8 inch diameter hole may be drilled at the low point of the pipe for condensate drainage.

13. Horizontal portions of the venting system shall be su prevent mi

14. Insulate pipe where appr

• Unit siz

exterior of the wall that it passes through to

it sizes 150–400: The vent terminal must be installed

electric meters, gas meters, regulators, and relief

ard the outlet for condensate drainage.

pported at minimum intervals of 4 feet (1.2 m) to

sagging (in Canada, support at 3 foot (1 m)

nimum intervals).

es 30–120: Avoid running vent pipe through unheated spaces; when this cannot be avoided, insulate the pipe to prevent condensation of moisture on the walls of the pipe. Insulate vent pipe runs longer than 10 feet (3 m). Insulation should be a minimum of 1/2 inch (12.7 mm) thick foil-faced.

e vent terminal must be installed

vent pipe and

ams to prevent leakage.

tape (or

with a condensate drain

opriate:

GTND-SVX01B-EN 27

Page 28

Installation: Piping

• Unit sizes 150–400: Insulate single wall vent pipe

exposed to cold air or running through unheated areas.

Figure 23. Unit sizes 30–120: Horizontal venting

requirements using single wall vent pipe (Category III)

Figure 24. Unit sizes 30–120: Horizontal venting

requirements using double wall vent pipe (Category III)

Figure 26. Unit sizes 150–400: Horizontally-vented

tubular unit heater (Category III)

Unit Sizes 30–120 Only: Vertically Vented Unit Heaters (Category III)

WARNI NG

Carbon Monoxide!

Figure 25. Unit sizes 30–120: Type B draft hood

connector

Observe the following precautions when venting the unit:

1. Use flue pipe of the same size as the flue connection(s) on the gas unit heater, 4” (102 mm). All heaters must be vented with a single or double wall pipe listed for positive pressure vent systems.

2. Each unit must have an individual vent pipe and vent terminal. Unit MUST NOT be connected to other vent systems or to a chimney.

3. Category III units are limited to a maximum of 40 feet

2.19 m) equivalent length of vent pipe. Equivalent

(1 length is the total length of straight sections PLUS 5 feet (1.5 m) for each 90° elbow and 2.5 feet (0.75 m)

h 45° elbow.

for eac

4. The top of the vent pipe should extend at least 2 feet (0.61 m) above the highest point on the roof.

nsideration should be made for anticipated snow

Co depth. Install an Amerivent Americap or Metalbestos vent cap over the vent opening. Slope horizontal runs upward from the gas unit heater at least 1/4-inch per foot (21 mm/m) minimum. Horizontal portions of the venting system shall be sup intervals of 4 feet (1.2 m); in Canada, support at 3 feet (1 m) minimum intervals: see Figure 27, p. 29,

Figure 29, p. 30, and Figure 31, p. 31.

5. Seal all vent pipe joints and se Use General Electric RTV-108, Dow-Corning RTV-732, or equivalent silicone sealant with a temperature

ported at minimum

ams to prevent leakage.

28 GTND-SVX01B-EN

Page 29

rating of 500°F, or 3M #425 aluminum foil tape (or equivalent).

6. Avoid running vent pipe through unheated spaces. en this cannot be avoided, insulate the pipe to

Wh prevent condensation of moisture on the walls of the pipe.

Figure 27. Unit sizes 30–120: Vertical venting

(Category III)

Installation: Piping

GTND-SVX01B-EN 29

Page 30

Installation: Piping

Vent pipe diameter

Unit sizes 30–120: See Table 1, p. 12 Unit sizes 150–400: See Tab le 2, p. 14

12” min.

(305 mm min.)

To prevent

building material

degradation from

flue gases.

Pitch flue pipe down toward outlet 1/4” per foot (21 mm/m) of run to allow for condensate drainage

Unit sizes 30–120: 3 feet (0.91 m) plus maximum snow depth for area above grade Unit sizes 150–400: 12 inches (305 mm) plus maximum snow depth for area above grade

3’-0” min.

(0.9 m min.)

6’-0” min.

(1.8 m min.)

Adjacent building

Building overhang

Approved vent cap (see instructions)

Flashing

Fiberglass insulation min. 2” thick (51 mm min.)

Flue

dia.

2” min.

(51 mm min.)

all around

2” clearance (51 mm) thimble

Wall

Unit sizes 30–120: 2 feet (0.609 m) plus maximum snow depth for area Unit sizes 150–400: 6 inches (152 mm) plus maximum snow depth for area All unit sizes: Vertical pipe extension over 12” (305 mm) must be insulated

6’-0” min.

(1.8 m min.)

Adjacent building

Roof pitched from 0° to 45°

Approved vent cap (see instructions)

Roof Flashing

Fiberglass insulation min. 2” thick (51 mm min.)

Flue

dia.

2” min. (51 mm min.) all around

2” clearance (51 mm) thimble

Vent pipe diameter

Unit sizes 30–120: See Table 1, p. 12 Unit sizes 150–400: See Tab le 2 , p. 14

Figure 28. All unit sizes: Horizontal arrangement, single wall vent system to single wall termination

Figure 29. All unit sizes: Vertical arrangement, single wall vent system to single wall termination

30 GTND-SVX01B-EN

Page 31

Installation: Piping

12” min.

(305 mm min.)

To prevent

building material

degradation from

flue gases.

Pitch flue pipe down toward outlet 1/4” per foot (21 mm/m) of run to allow for condensate drainage

3 feet (0.91 m) plus maximum snow depth for area above grade

3’-0” min.

(0.9 m min.)

6’-0” min.

(1.8 m min.)

Adjacent building

Building overhang

Approved vent cap (see instructions)

Flashing

Flue

dia.

Wall

8” to 10”

(203 to 254 mm)

maximum

Clearance to be as specified by vent manufacturer

Seal joint between single w all vent and double wa ll vent and the annular space of the double wall vent

Vent pipe diameter

Unit sizes 30–120: See Table 1, p. 12 Unit sizes 150–400: See Tab le 2, p. 14

2 feet (0.609 m) plus

maximum snow depth for

area (vertical pip extension over 12” [305 mm] must be

insulated)

6’-0” min.

(1.8 m min.)

Adjacent building

Roof pitched from 0° to 45°

Approved vent cap (see instructions)

Roof Flashing

Flue

dia.

8” to 10”

(203 to 254 mm)

maximum

Clearance to be as specified by vent manufacturer

Seal joint between single w all vent and “B” vent and the annular space o f the “B” v ent .

Vent pipe diameter

Unit sizes 30–120: See Table 1, p. 12 Unit sizes 150–400: See Table 2, p. 14

Figure 30. All unit sizes: Horizontal arrangement, single wall vent system to double wall termination

Figure 31. All unit sizes: Vertical arrangement, single wall vent system to double wall termination

GTND-SVX01B-EN 31

Page 32

Installation: Piping

Separated Combustion

Unit Sizes 30–120 Only: Category III

Combustion Air Venting and Piping

WARN ING

Carbon Monoxide!

Never operate unit heaters without combustion air and flue gas piping in place. Each unit heater 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 heed these warnings could result in death or serious injury.

WARN ING

Risk of Fire and Carbon Monoxide Poisoning with Improper Piping!

Never use pipe other than diameter stated in Tab l e 1 ,

p. 12. 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.

1. The combustion air system installation must be in accordance with the current edition of the National Fuel Gas Code-NFPA 54 or ANSI Z223.1 National Fuel Gas Code. In Canada, installation must be in accordance with CAN/CGA-B149.1 “Installation Code for Natural Gas Burning Appliances and Equipment” and CAN/CGA-B149.2“ Installation Code for Propane Burning Appliances and Equipment”.

2. The concentric vent box, inlet air screen, deflector disk, and vent terminal provided with the unit heater must be installed at the termination point of the combustion air/vent system. Refer to Figure 32, p. 33 through

Figure 36, p. 35 and Ta b le 8, p. 33.

3. Each unit heater MUST have its own combustion air system. It MUS systems.

4. Use single wall pipe constructed of 26 GA galvanized steel or corrosion resistance for the vent system. For installations in Canada, use corrosion resistant and gas-tight, listed vent pipe conforming with local building codes, or in the absence of local building codes, with current CAN/CGA-B149.1, “Installation Codes for Natural Gas Burning Appliances and Equipment” or CAN/CGA-B149.2, “Installation Codes for Propane Gas Burning Appliances and Equipment”.

a material of equivalent durability and

T NOT be connected to other air intake

For installations in the United States, vent pipe approved for Category III appliances must be used between the appliance unless 33% of the vent run is vertical, then single wall galvanized vent pipe or double wall Type B vent pipe

y be used between the appliance and the concentric

ma vent box. A single length of double wall Type B vent pipe must be used to go through the concentric vent box and outside wall to the vent terminal.

5. Long runs of single wall combustion air piping passing through an condensation becomes noticeable.

6. The combustion air system mu prevent collection of condensate. Pitch horizontal pipes downward 1/4 inch per foot toward the inlet cap to facilitate drainage. Vertical combustion air pipes should be piped as depicted in Figure 34, p. 34.

7. The equivalent length of the combustion air system must not

xceed 30 feet (9 m). Equivalent length equals the total

e length of straight pipe plus 5 feet (1.5 m) for each 90° elbow and 2.5 feet (0.76 m) for each 45° elbow.

Note: F

8. Each slip joint must be secured with at least three

rosion resistant screws. Two full turns of 3M #425

cor Aluminum Foil Tape or its equivalent must then be used to seal each joint. General Electric RTV-108, DowCorning RTV-732 or an equivalent silicone sealant with a temperature rating of 500°F may be used instead of the tape.

9. For horizontal combustion air systems longer than 5 feet (1.5 m), the system must b overhead building structures at 4-foot (1.2-m) intervals in the U.S. and at 3-foot (0.91-m) intervals in Canada.

unheated space may require insulating if

be less than 5 feet (1.5 m) and must not

or optimum performance keep the

combustion air system as straight as possible.

and the concentric vent box

st be installed to

e supported from

Exhaust Venting

WARNI NG

Carbon Monoxide!

Note: Every Separated Combustion unit to be installed

MUST use the factory-supplied Concentric Vent Kit. If you do not have this kit, contact the manufacturer ASAP to obtain one prior to installation.

1. Vent system installation must be in accordance with the current National Fuel Gas Code-NFPA 54 or ANSI

32 GTND-SVX01B-EN

Page 33

Installation: Piping

Z223.1 National Fuel Gas Code. In Canada installation must be in accordance with CAN/CGA-B149.1 “Installation Code for Natural Gas Burning Appliances and Equipment” and CAN/CGA-B149.2. “Installation Code for Propane Burning Appliances and Equipment”.

2. The Concentric Vent Kit (which includes a concentric vent box, air inlet screen, deflector collar, vent terminal and inlet air collar) provided with the heater by the manufacturer must be installed at the termination point of the combustion air/vent system. Refer to

Figure 32, p. 33 through Figure 36, p. 35 and Tab l e 8, p. 33.

3. Each unit heater MUST have its own vent system. It

UST NOT be connected to other vent systems or to a

M chimne y.

4. Use flue pipe of the same size as the flue connections

n the gas unit heater (see Tab l e 1, p. 12). All heaters

o must be vented with a single or double wall pipe listed for Category III positive pressure

vent systems. A single length of double wall vent pipe must be used to go through the concentric vent box and outside wall to the vent terminal.

5. The vent system must be installe

d to prevent collection of condensate. Pitch horizontal pipes downward 1/ 4 inch per foot (21 mm per meter) toward the vent cap to facilitate drainage. Vertical vent pipes should be piped as depicted in Figure 34, p. 34.

6. The equivalent lengt

h of the vent system must not be less than 5 feet (1.5 m) and must not exceed 30 feet (9 m). The equivalent length equals the

total length of

straight pipe plus 5 feet (1.5 m) for each 90° elbow and

2.5 feet (0.76 m) for each 45° elbow.

7. Each slip joint must be secured with at least three rosion resistant screws. Two full turns of 3M #425

cor

uminum Foil tape or its equivalent must then be

Al used to seal each joint. High temperature silicone sealant may be used instead of the tape. Silicone sealant must be used to seal the joint between the Typ e B vent pipe and the single wall pipe.

8. For horizontal vent systems longer than 5 feet (1.5 m),

e system must be supported from overhead building

th structures at 4-foot (1.2-m) intervals in the U.S. and at 3-foot (0.91-m) intervals in Canada.

9. The exhaust vent system m

ust remain at a minimum

distance of 1 inch (25 mm) from all combustible

rials. Any part of the vent system that passes

mate through a combustible material must be properly insulated.

Note: Increa

sing the clearance distances may be necessary if there is a possibility of distortion or discoloration of adjacent materials.

10. The top of a VERTICALLY VENTED exhaust system must ex

tend at least 3 feet (0.91 m) above the roof

surface that it passes through (see Figure 34, p. 34).

11. The point of termination for a HORIZONTALLY VENTED exhaust the exteri

system must be at least 12 inches (0.3 m) from

or of the wall that it passes through. In addition, the termination point must be at least 1 foot (0.3 m) above grade or above the

snow line, more than 6 feet (1.8 m) from the combustion air inlet of another appliance, at least 4 feet (1.2 m) below, 4 feet (1.2 m) horizontally from, or 1 foot (0.3 m) above any door,

dow or gravity air inlet into any building, and more

win than 3 feet (0.91 m) from and not directly above, any

as meter or service regulator. Refer to Figure 35,

p. 34, Figure 36, p. 35, and Ta bl e 6, p. 24.

Table 8. Unit sizes 30–120: Concentric vent box

dimensions

Dimensions—Inches (Nominal)

Unit Size

30 45 60 75 90

120

A B C D E G

4-1/2 4 6 8 5 12

5-1/2 5 8 12 5 15105

Figure 32. Unit sizes 30–120: Concentric vent box

GTND-SVX01B-EN 33

Page 34

Installation: Piping

Figure 33. Unit sizes 30–120: Concentric vent

installation

Figure 34. Unit sizes 30–120: Vertical intake/vent installation

Figure 35. Unit sizes 30–120: Horizontal intake/vent

installation

34 GTND-SVX01B-EN

Page 35

Installation: Piping

Vent Terminal

(1.8M Min.)

Adjacent Building

D 3330

6'-0" Min.

(0.9M Min.)

3'-0" Min.

Building Overhang

Figure 36. Unit sizes 30–120: Horizontal intake/vent

installation

Air Inlet Collar

Remove screen and mounting plate from air inlet on rear panel of unit by removing 4 screws. Secure inlet collar and gasket to inlet opening re-using the 4 screws removed in step one.

Exhaust Air Collar

Unit sizes 90–120: Secure the reducer fitting (to transition from 5” pipe to 4” pipe) to the flue collar on the rear panel. Seal per exhaust venting instructions.

underside of the roof using suitable brackets (field supplied). Before mounting box, cut a length of pipe so that dimension A, Figure 34, p. 34, is equal to the dimension from the top of the box to the roof surface plus 20 inches or plus maximum expected snow depth, whichever is greater:

• Unit sizes 30–75: Cut a length of 6-inch (152-mm) pipe.

• Unit sizes 90–120: Cu t a le ng th of 8- inch (203-mm) pipe.

Fasten pipe to combustion air inlet connection of concentric vent box and seal joint. Insert pipe through roof and fasten vent box in place. Flash and/or caulk pipe to roof. Install inlet air screen assembly and fasten to pipe with screws.

Insert a 5-foot length of Type B vent pipe through the concentric vent box opening (see Figure 32, p. 33, detail A) with the “UP” arrow pointing up. Position the pipe to extend 12 inches beyond the inlet air screen. Secure the Type B vent pipe in position by drilling three small equally spaced holes through the collar of the concentric vent box and inserting sheet metal screws. Install deflector disk on Type B vent pipe 2-1/2 inches above inlet air screen and fasten with screws. Seal joint between deflector disk and pipe with silicone sealant. Install vent terminal on top of Type B vent pipe, fasten with screws and seal joint.

Connect flue pipe and combustion air pipe from concentric vent box to unit, following instructions in “Combustion Air

Venting and Piping,” p. 32 and“Exhaust Venting,” p. 32.

Joint between Type B vent pipe and single wall vent pipe must be sealed with high temperature silicone sealant (see

Figure 33, p. 34). Collars on unit and on concentric vent

box are sized so that crimped ends of combustion air pipes go toward the unit and crimped ends of flue pipes go away from the unit.

Concentric Vent Terminal—Vertical Termination

WARN ING

Risk of Fire and Carbon Monoxide Poisoning with Improper Piping!

Never use pipe other than diameter stated in Tab l e 1 ,

p. 12. To prevent pipe from melting and introducing

Select location on roof for vent terminal, ensuring adequate space inside the building/structure for concentric vent box. Terminal must be at least 6 feet (1.8 m) from any wall or adjoining building (see Figure 34,

p. 34).

Cut a hole through the roof for combustion air pipe. Concentric vent box is to be suspended from the

GTND-SVX01B-EN 35

Concentric Vent Terminal—Horizontal Termination

Select a location on outside wall for vent terminal. In most applications, the terminal should be on level with the flue outlet of the unit less a 1/4 inch per foot pitch for condensate drainage toward the outside of the building (see Figure 35, p. 34).

The location of the vent terminal must be in accordance with the National Fuel Gas Code ANSI Z223.1 in the U.S. or the Natural Gas Installation Code CAN/CGA-B149.1 or the Propane Gas Installation Code CAN/CGA-149.2 in Canada. Refer to Table 6, p. 24 for minimum. In Canada, a vent shall not terminate above a meter/regulator assembly within 3 feet (0.9 m) horizontally of the vertical centerline of the regulator nor within 6 feet (1.8 m) of any gas service regulator vent outlet.

Cut a hole through the wall for a combustion air pipe:

• Unit sizes 30–75: Cut for a 6-inch (152-mm) combustion air pipe.

• Unit sizes 90–120: Cut for an 8-inch (203-mm) combustion air pipe.

Page 36

Installation: Piping

Install thimble if required by local codes or type of wall construction. Concentric vent box may be fastened directly to wall or spaced away from wall using suitable brackets (field supplied). Cut a length of pipe so th at it wil l protrude 4 inches (102 mm) through the wall when the box is mounted in position. Fasten pipe to box with sheet metal screws, using at least three screws per joint. Seal joint with silicone sealant. Insert pipe through wall and fasten adapter box in place so that the pipe pitches downward 1/ 4 inch per foot (21 mm/m) toward the outside. Flash and/ or caulk pipe on outside wall. Install inlet air screen assembly and fasten to pipe with screws. Insert a 3-foot length of Type B vent pipe through the concentric vent box opening (see Figure 32, p. 33, detail A) with the “UP” arrow pointing toward the outside:

• Unit sizes 30–75: Insert a 3-foot lengt h of 4- inch Typ e B vent pipe

• Unit sizes 90–120: Insert a 3-foot length of 5-inch Type B vent pipe.

Position the pipe to extend 12 inches beyond the inlet air screen. Secure the Type B vent pipe in position by drilling three small equally spaced holes through the collar of the concentric vent box and inserting sheet metal screws. Install deflector disk on Type B vent pipe 2-1/2 inches (63.5 mm) from inlet air screen and fasten with screws. Install vent terminal on end of Type B vent pipe, fasten with screws and seal joint.

Connect flue pipe and combustion air pipe from concentric vent box to unit, following instructions “Combustion Air

Venting and Piping,” p. 32 and“Exhaust Venting,” p. 32.

Joint between Type B vent pipe and single wall vent pipe must be sealed with high temperature silicone sealant (see

Figure 33, p. 34). Collars on unit and on concentric vent

box are sized so that crimped ends of combustion air pipes go toward the unit and crimped ends of flue pipes go away from the unit.

36 GTND-SVX01B-EN

Page 37

Installation: Electrical

Electrical Connections

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.

WARN ING

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.

WARN ING

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.

It is recommended that the electrical power supply to each unit heater be provided by a separate, fused, and permanently live electrical circuit. A disconnect switch of suitable electrical rating for each unit heater should be located as close to the gas valve and controls as possible. Each unit heater must be electrically grounded in accordance with the latest edition of the National Electric Code, ANSI/NFPA No. 70 or CSA Standard C22.1. See sample wiring connections:

• All unit sizes: Refer to Figure 37, p. 37 through

Figure 39, p. 38 and Figure 42, p. 50.

• Unit sizes 30–120: Also refer to Figure 43, p. 51 through

Figure 44, p. 51.

• Unit sizes 150–400: Also refer to Figure 45, p. 52 and

Figure 46, p. 52.

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,

h as behind doors or in corners.

suc

Figure 37. All unit sizes: Low-voltage thermostat wiring

(Single stage)

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 unit heater 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.

GTND-SVX01B-EN 37

Page 38

Installation: Electrical

RGW1W2

D6922C

Figure 38. All unit sizes: Low-voltage thermostat wiring

(Two stage)

Figure 39. All unit sizes: T834H or T843N Thermostat

wiring

Thermostat Heat Anticipator Adjustments. The

initial heat anticipator setpoint should equal the thermostat’s current amperage draw when the unit is firing. This setpoint should be measured for the best results. Use the recommended ranges as a guide. If further information is needed, consult your thermostat manufacturer’s instructions.

Recommended Heat Anticipator Settings:

Unit Size: 30–200 250–400

For Tubular Units: 0.35 Amps 0.65 Amps

Note: Should any high limit wires have to be replaced,

they must be replaced with wiring material having a temperature rating of 200°C minimum.

38 GTND-SVX01B-EN

Page 39

Start-Up

All Unit Sizes: Operation

Power Vented Propeller Units—Direct Spark Ignition

Explanation of Controls

WARNING

Carbon Monoxide!

Never operate unit heaters if the power venter is not operable. 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 due to Carbon Monoxide Poisoning (symptoms include grogginess, lethargy, inappropriate tiredness, or flu-like symptoms).

Note: Refer to figures:

• Unit sizes 30–120: Refer to Figure 40, p. 40.

• Unit sizes 150–400: Refer to Figure 41, p. 40.

1. Each Unit Heater comes equipped with a power vent system that consists of a power venter motor and blower, pressure switch, and sealed flue collector in place of the conventional draft diverter.

2. The power venter motor is energized by the room thermostat through the integrated control board when a demand for heat is sensed. The pressure switch measures the flow through the vent system and energizes the direct spark ignition system beginning the pre-purge timing when the flow is correct.

3. The direct spark igni control module and a gas valve. When the pre-purge period ends, the spark ignition system is energized, and the gas valve opens to supply gas to the burner. Once the thermostat has been satisfied, the vent system is de-energized, stopping all gas flow to the unit.

4. The limit switch interrupts the flow of electric cur the control board, interrupting the flow of gas to the gas valve if the unit heater becomes overheated.

tion system consists of an ignition

rent to

WARNI NG

Flame Roll-Out Hazard!

Flame roll-out can cause fire! The flame roll-out switch trips in events in which flame extends beyond the combustion chamber. When the flame roll-out switch trips, it interrupts the flow of electric current to the control board, interrupting the flow of gas to the unit heater in the event of sustained flame roll-out from the burner area. If the flame roll-out switch trips, you must determine and correct the cause of the flame roll-out before starting the unit back up. Failure to do so could result in death or serious injury.

5. Once the thermostat is satisfied, or the limit switch interrupts the flow of electric current to the control board, the unit will begin a post-purge period. When the post-purge period ends, the power venter motor is de-energized.

6. The operation of the fan is delayed for approximately

econds once the thermostat is closed, and

30 s continues operation for approximately 30 seconds after the thermostat opens.

Note: The

7. The wall thermostat, supplied optionally, is a tem and ignition systems to control the temperature of the space being heated.

Note: Th

start-up fan delay must not exceed 30

seconds from a cold start.

perature sensitive switch that operates the vent

e thermostat must be mounted on a vertical, vibration-free surface, free from air currents, and in accordance with the furnished instructions.

Start-Up (also refer to lighting instruction plate equipped on the unit)

1. Open the manual gas valve, in the gas supply line to the unit heater with union connection loose, purge air from the gas line. Tighten the union and check for leaks.

WARNI NG

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.

2. Open the manual valve on the unit

GTND-SVX01B-EN 39

heater.

Page 40

Start-Up

3. Turn on the electrical power. The unit heater should now be under the control of the thermostat. Set the thermostat to its highest setting; the power venter motor should start and burner ignition occur. Turn the thermostat to its lowest setting; the power venter

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 (also

refer to lighting instruction plate equipped on the unit),” p. 39 (preceding section).

Refer to the figures for par

• All unit sizes: Refer to Figure 2, p. 8.

• Unit sizes 30–120: Also refer to Figure 3, p. 9 through

Figure 6, p. 10 and Figure 40, p. 40.

• Unit sizes 150–400: Also refer to Figure 7, p. 10 through

Figure 12, p. 11 and Figure 41, p. 40.

Figure 40. Unit sizes 30–120: Burner parts/identification

ts/identification:

motor shuts off and the burner(s) should extinguish. Reset the thermostat to the desired operational setting.

Note: F

or more information, refer to “Gas Input Rate,”

p. 40 and “Gas Pressure Adjustments,” p. 40.

Gas Input Rate

NOTICE:

Overfiring!

Never overfire the unit heater, as this could cause unsatisfactory operation, or shorten the life of the heater.

Check the gas input rate as follows (refer to “General

Safety Information,” p. 7 for metric conversions):

1. Turn off all gas appliances that utilize gas the same meter as the unit heater.

2. Turn gas on to the unit heater.

3. Using the gas meter, clock the time that one cubic foot of gas (Heating Value).

4. Insert the time, in seconds, into the

Input Rate =

Heating Value (Btu/ft

Time (s/ft

it takes to burn

formula below:

) (3600 s/hr)

)

Figure 41. Unit sizes 150–400: Burner parts/

identification

Primary Air Adjustment

Primary air adjustment is made at the factory. No field adjustments are necessary.

Example: If the heating value = 1000 BTU/ft3 and the time/ ft3 = 48 s/ft3 then

Input Rate =

Input Rate = 75,000 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, adjust the gas pressure:

• Unit sizes 30–120: Refer to Table 1, p. 12.

• Unit sizes 150–400: Refer to Table 2, p. 14.

(1000 BTU/ft3) (3600 s/hr)

48 s/ft

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:

• Unit sizes 30–120: The pressure tap plug is below

the control outlet.

• Unit sizes 150–400: the pressure tap plug is

adjacent to the control outlet.

40 GTND-SVX01B-EN

Page 41

Start-Up

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.

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

op 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.

3. The adjusted manifold pressure should not var than 10 percent from the pressure specified in Ta bl e 9,

p. 41 and Ta bl e 10, p. 42.

y more

Table 9. All unit sizes: Main burner orifice schedule

Type of Gas Natural Propane

Heating

Input in 1000 BTU(a)

30 ft

45 ft

60 ft

75 ft

90 ft

105 ft

120 ft

150 ft

175 ft

200 ft

250 ft

300 ft

350 ft

400 ft

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

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

Value

Manifold Pressure 3.5” wc (0.9 kPA)

/hr 28 12 1

Orifice Drill 38 52

/hr 42 18 1

Orifice Drill 31 48

/hr 56 24 1

Orifice Drill 27 43

/hr 70 30 1

Orifice Drill 20 40

/hr 84 36 1

Orifice Drill 16 36

/hr 98 42 1

Orifice Drill 11 32

/hr 112 48 1

Orifice Drill 6 3.1 mm

/hr 140 60 6

Orifice Drill 42 53

/hr 163 70 7

Orifice Drill 42 53

/hr 186 80 8

Orifice Drill 42 53

/hr 233 100 10

Orifice Drill 42 53

/hr 280 120 12

Orifice Drill 42 53

/hr 326 140 14

Orifice Drill 42 53

/hr 372 160 16

Orifice Drill 42 53

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 o ri fic ed to 90 percent of the normal altitude rating, and be so marked in accordance with the ETL certification.

(610 m) or less. SPECIAL ORIFICES ARE REQUIRED FOR INSTALLATIONS ABOVE 2,000 FEET (610 m).

1075 BTU/ft (40.1 MJ/m

2500 BTU/ft

(93.1 MJ/m

)

10” wc (2.5 kPA)

)

(a)

No. of Burner Orifices

Tubular Unit Heater High Altitude Deration

This tubular unit heater has been manufactured utilizing standard burner orifices and a normal manifold pressure setting as per the specifications shown on the unit rating plate (see Table 4, p. 23, Table 9, p. 41, and Table 10, p. 42).

All unit deration must be done through field adjustments by a qualified technician (see Ta bl e 10 , p. 4 2 ). Once the proper adjustments are made in the field, attach label #J17-06459 to the unit, and record adjusted manifold pressure, altitude of the unit installation and the technician’s name and date on the label using a permanent marker.

GTND-SVX01B-EN 41

Page 42

Start-Up

Ta b le 10 . All unit sizes: Tubular unit heater high altitude

manifold pressure

Natural Gas Propane (LP) Gas

Manifold

Pressure (in. wc)

(a)

Value

Unit Sizes Unit Sizes

30–120 150–400 30–120 150–400

)

at sea level.

Altitude

(a)Consult local utility for actual heating value. Table based on heating val-

Heating

(Btu/ ft

(ft)

2,000 948 3.5 3.5 2,278 10.0 8.6 2,500 931 3.5 3.5 2,237 10.0 8.5 3,000 914 3.5 3.3 2,196 10.0 8.4 3,500 897 3.4 3.2 2,156 10.0 8.4 4,000 881 3.4 3.2 2,116 10.0 8.3 4,500 865 3.4 3.2 2,077 9.9 8.2 5,000 849 3.3 3.1 2,039 9.7 8.1 5,500 833 3.3 3.1 2,000 9.6 8.0 6,000 818 3.2 3.0 1,964 9.5 7.9 6,500 802 3.2 3.0 1,927 9.3 7.7 7,000 787 3.1 2.9 1,891 9.2 7.6 7,500 771 3.1 2.9 1,853 9.0 7.5 8,000 756 3.1 2.8 1,817 8.9 7.4 8,500 741 3.0 2.8 1,781 8.7 7.2 9,000 726 2.9 2.7 1,745 8.5 7.1 9,500 711 2.9 2.7 1,709 8.3 6.9

10,000 696 2.8 2.6 1,673 8.1 6.8

ue of 1,050 Btu/ft

Heating(a

) Value

(Btu/ ft

Manifold Pressure

(in. wc)

)

42 GTND-SVX01B-EN

Page 43

Start-Up

GENERAL

With power and gas off.

 Make certain all packing has been removed.

 Tighten all electrical terminals and connections.

 Check damper linkages for tightness.

 Check all fans and blowers for free movement.

 Check all controls for proper settings.

GAS HEATING

With power and gas on.

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

 Burner ignition.

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

 Cycle firestat and/or freezestat.

 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.

Gas Equipment Start-Up

Customer _____________________________________________ Job Name & Number _________________________

Pre-Inspection Information with Power and Gas Off

Type of Equip: Unit Heater

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: _____________________________________________________________________________________________________

_______________________________________________________________________________________________________________

GTND-SVX01B-EN 43

Page 44

Maintenance

WARN ING

Hazardous Service Procedures!

Periodic Service

All Maintenance/Service information should be recorded accordingly on the inspection sheet provided in this manual (see “Gas Equipment Start-Up,” p. 43).

Note: The heater and vent system should be checked

once a year by a qualified technician.

WARN ING

Hazardous Voltage and Gas!

Important: Gas tightness of the safety shut-off valves

must be checked on at least an annual basis.

WARN ING

Hazard of Explosion!

To check gas tightness of the safety shut-off valves, turn off the manual valve upstream of the appliance combination control. Remove the plug on the inlet side of the combination control and connect a manometer to that tapping:

• Unit sizes 30–120: The plug is 3/32-hex head.

• Unit sizes 150–400: The plug is a 1/8-inch pipe plug.

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.

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.

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

it sizes 30–120: Remove service access panel.

3. Un

4. To clean or replace the main burner(s):

• Unit sizes 30–120: Remove retainer from around

manifold orifice, disconnect flame sensor and igniter from control board, remove burner assembly mounting screws (see Figure 3, p. 9).

• Unit sizes 150–400: Remove burner cover. Remove

top strip from above burners. Lift burners up and pull away from manifold to remove.

5. With the burner(s) removed, surfaces of the heat exchanger.

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

rner(s) using a wire brush and/or compressed air.

bu Ensure that all parts are unobstructed.

7. Reassemble the unit heater by replacing all parts in

everse order.

8. Unit siz start-up procedure as given in “All Unit Sizes:

Operation,” p. 39 of this manual (see unit lighting

instruction plate and the unit nameplate).

9. Check the burner adjustment.

10. Check all gas control valves and pipe connections for leak

11. Check the operation of the automatic gas valve by lowering operation of the gas unit heater. The gas valve should

es 150–400: Complete the appropriate unit

the setting of the thermostat, stopping the

wire brush the inside

44 GTND-SVX01B-EN

Page 45

close tightly, completely extinguishing the flame on the main burner(s).

12. Inspect and service the mo maintain efficient air flow, inspect and clean the fan blades and guard to prevent buildup of foreign matter.

13. Check lubrication instructions on the motor. If oiling is

equired, add 3 to 4 drops of electric motor oil as

r follows:

a. Light Duty—After 3 years or 25,000 hours of

operatio

b. Average Duty—Annually after 3 years or

8,000 hours of operation.

c. Heavy Duty—Annually after 1 year or at least

1,500 hours of operation.

14. Check and test the operational functions of all devices supplied with your unit.

tor/fan assemblies. To

safety

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

eplacement Parts Catalog.

Maintenance

GTND-SVX01B-EN 45

Page 46

Diagnostics

Troubleshooting

WARNING

Hazardous Service Procedures!

Table 11. Troubleshooting guide

Symptoms Possible Cause(s) Corrective Action

A. Flame pops back. 1. Burner orifice incorrect. 1. Check for proper orifice size. Refer to “All Unit Sizes:

2. Low manifold pressure. 2. Test and reset manifold pressure.

B. Noisy flame. 1. Irregular orifice causing whistle or

C. Yellow tip flame (some yellow

tipping on propane gas is permissible).

D. Floating flame. 1. Blocked venting. 1. Clean flue. Refer to “Installation: Piping,” p. 21.

E. Gas Odor. 1. Shut off gas supply

F. Delayed ignition. 1. Improper ground. 1. Check grounding wires and spark bracket connections.

resonance.

2. Excessive gas input. 2. Test and reset manifold pressure.

1. Clogged burner(s). 1. Clean main burner ports.

2. Misaligned orifice(s). 2. Align manifold assembly.

2. Insufficient combustion air. 2. Clean combustion air inlet openings.

3. Blocked heat exchanger. 3. Clean heat exchanger. Refer to “Installation: Mechanical,”

4. Air leak into combustion chamber , flue collector, or draft hood.

immediately!

2. Leaking gas test port on valve. 2. Check to ensure gas test ports are seated.

3. Blocked heat exchanger. 3. Clean heat exchanger/flue.

4. Negative pressure in building. 4. See “Installation: Piping,” p. 21.

5. Blocked flue collector and/or draft hood.

2. Bad or broken spark cable. 2. Inspect spark cable connections and cuts.

3. Faulty control. 3. Check to ensure spark is energized after pre purge period.

4. Manifold pressure set too low. 4. Test and reset manifold pressure. Refer to “All Unit Sizes:

5. Main burner orifice(s) dirty. 5. Clean or replace orifice(s).

6. Improper venting. 6. Refer to “Installation: Piping,” p. 21.

Operation,” p. 39.

1. Replace orifice.

p. 16.

4. Determine cause and repair accordingly.

1. Inspect all gas piping and repair.

5. Clean flue collector and/or draft hood.

Operation,” p. 39.

46 GTND-SVX01B-EN

Page 47

Diagnostics

Table 11. Troubleshooting guide (continued)

Symptoms Possible Cause(s) Corrective Action

G. Failure to ignite. 1. Gas supply is off. 1. Open all manual gas valves. Check for leaks.

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

3. Thermostat not calling for heat. 3. Turn up thermostat. Check for 24 vo lts at terminals “R” and

4. Defective high limit. 4. Check limit switch with continuity tester. If open with no

5. Defective drafter prove switch. 5. Check switch operation to ensure switch closes after dr after

6. Improper ground. 6. Check all ground wires and connections.

7. Improper thermostat or transformer wiring.

8. Ignitor defective/d amaged. 8. Replace ignitor.

9. Misaligned ignitor. 9. Realign ignitor.

10. Defective gas valve. 10. Check for 24 volts at gas valve terminals during trial for

11. Loose wiring. 11. Check and tighten all wiring connections per diagrams.

12. Blown fuse. 12. Refer to symptom Q.

H. Condensation of water vapor. 1. Improper venting. 1. Refer to “Installation: Venting,” p. 23.

2. Unit under-fired. 2. Check gas supply pressures to unit. R e fer to “Installation:

3. Building too cold. 3. Refer to “Installation: Mechanical,” p. 16.

I. Burner(s) won't turn off. 1. Poor thermostat location. 1. Relocate thermostat away from outside walls or drafts.

2. Improper thermostat wiring at gas valve.

3. Short circuit. 3. Check thermostat circuit for short (such as staples pier cing

4. Defective or sticking gas valve. 4. Check for 24V at gas valve terminals when thermostat is not

5. Excessive gas supply pressure. 5. Refer to “Installation: Piping,” p. 21.

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

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

L. Fan will not run. 1. Loose electrical connections. 1. Check and tighten wires on fan circuit.

M. Fan motor turns on and off while

burner is operating.

valve or thermostat.

2. Excessive thermostat heat anticipator setting.

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

4. Poor thermostat location. 4. Relocate thermostat.

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

3. Power venter wheel 3. Realign power venter wheel.

2. Defective motor or overload. 2. Test for 115V at terminal ACB Heat and “L2”. If voltage is

3. Defective control board. 3. Test for 115V at terminal ACB Heat and “L2” on the control

4. Blown fuse. 4. Replace fuse.

1. Motor overload protection is tripping.

2. Loose wiring or connection. 2. Check for 115V between motor leads.

3. Control board is defective. 3. Check terminal ACB Heat for voltage. If voltage is not

“W1” on terminal strip.

heat present, replace limit switch.

purge period. If it does not, make/check tubing connections/blockage.

7. Check wiring per diagrams.

ignition period. If present with no manifold pressure, replace gas valve.

Mechanical,” p. 16.

2. Check thermostat circuit for open and close on terminal strip on heater “R” and “W”.

thermostat wiring), and correct.

calling.

1. Tighten all electrical connections.

2. Adjust thermostat heat anticipator for longer cycles. Refer to “Installation: Electrical,” p. 37.

proper gas supply.

present, replace motor.

board. If voltage is not present 45 seconds after trial for ignition, replace board.

1. Check motor amps against motor name plate, and check voltage. Replace if found defective.

constant, replace board.

GTND-SVX01B-EN 47

Page 48

Diagnostics

Table 11. Troubleshooting guide (continued)

Symptoms Possible Cause(s) Corrective Action

N. Fan will not stop. 1. Control board is in flame failure

O. Not enough heat. 1. Incorrect gas input. 1. Refer to “All Unit Sizes: Operation,” p. 39.

P. Too much heat. 1. Unit is over-fired. 1. Refer to “All Unit Sizes: Operation, ” p. 39. Check orifice size;

Q. Blown fuse. 1. Electrical short. 1. Refer to wiring diagram.

R. Cold air is delivered during heater

operation.

S. Hi-Limit switch tripping. 1. Unit is overfiring. 1. Burner orifice(s) may be too large: verify/replace if

T. Power venter will not run. 1. Loose wiring or connections. 1. Check all wiring in the power vent circuit to ensure good

U. Power venter motor turns on and

off while burner is operating.

V. Power venter motor will not stop. 1. Power venter improperly wired. 1. Check power venter circuit per wiring diagram.

mode.

2. Fan improperly wired. 2. Check wiring of fan circuit per wiring diagram.

3. Defective board. 3. If unit is not calling for heat and board is not in a flash code

2. Heater undersized. 2. Is the heater output sized correctly for the heat loss of the

3. Thermostat malfunction. 3. Check thermostat circuit, 24V at terminals “R ” and “W” on

4. Heater cycling on limit. 4. Check air movement across heat exchanger. Check voltage

5. Incorrect orifice size(s). 5. Check orifice size; replace if undersized.

2. Thermostat malfunction. 2. Check thermostat for operation, to ensure circ uit opens and

3. Heater runs continuously. 3. Check wiring per diagrams; check operation at gas valve.

2. Improper ground. 2. Check grounding wires.

3. Defective gas valve. 3. Replace.

1. Incorrect manifold pressure or input.

2. Air flow too low. 2. Check for proper voltage. Ensure fan blade is correctly

3. Defective switch. 3. Check operation of switch. Did the switch open when unit is

4. Defective control board. 4. Check for 24V on line side of the high limit. Constant voltage

2. Motor overload is tripped or bad motor.

3. Defective control board. 3. Check for continuous 115V on terminal “CBM Blower” and

1. Power venter improperly wired. 1. Check power venter circuit per wiring diagram.

2. Motor overload cycling or defective motor.

3. Defective control board. 3. Check for continuous 115V on terminal “CMB Blower” during

2. Main burner not lighting while thermostat calls for heat.

3. Defective control board. 3. No flash codes present along with no call for heat; replace

4. Loss of pressure. Pressure switch not made.

1. Turn 115V power off to the unit, wait 10 seconds, and reapply voltage to the unit.

mode, replace board.

space? Has the space been enlarged?

terminal strip.

and amps to fan motor. Check gas input to ensure unit is not over-fired. Check heat exchanger to ensure unit is not dirty.

if too big, replace.

closes.

Look for short (such as staples pie rcing thermostat wir ing) in thermostat circuit and correct.

1. Refer to “All Unit Sizes: Operation,” p. 39.

required.

positioned 1/3 inside venturi.

running or is the switch open during start-up?

should be recorded; if not, control board is suspect. Check flash code.

connection, including “Neutral”.

2. Check for 115V between motor leads and check amp draw of motor. Replace if needed.

neutral during call for heat. If not present and all checks are normal, replace.

2. Check motor amps against motor name plate rating, check voltage; replace motor if defective.

call for heat; replace board if found defective.

2. Heater is in lockout mode; check flash code table for problem.

control board.

4. Check venting for blockage. Check tubing for blockage or hole. Check spud for blockage.

48 GTND-SVX01B-EN

Page 49

Diagnostics

WARN ING

Live Electrical Components!

During installation, testing, servicing and troubleshooting of this product, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury.

1. Check the system thermostat to make sure it is calling for heat. (Do not cycle the thermostat on and off at this time.)

2. Remove the access panel. Do not interrupt power to the control board by opening any electrically interlocked panels.

3. Observe the LED indicator on green LED labeled “OK” indicates system faults); check and repair system as noted in the chart to the right.

Note: Air flow proving switch and power venter hose

barbs must be free of any dust or debris at all times. Periodically check these openings and/or if any problems occur.

the control board (a

Table 23. All unit sizes: Troubleshooting with LED

Indicator Assistance for UT Control Board

LED Status Indicates Check/Repair

Slow Flash Control OK, no call

for heat.

Fast Flash Control OK, call

for heat present.

Steady Off Internal control

fault, or no power.

Steady On Control internal

failure or bad ground.

2 Flashes In lockout from

failed ignitions or flame losses.

3 Flashes Pressure Switch

open with inducer on or closed with inducer off.

4 Flashes Limit or rollout

switch is open.

5 Flashes Flame sensed

while gas valve is off.

6 Flashes On-board

microprocessors disagree.

Not Applicable

1. Line voltage on terminals 120 and C on transformer.

2. Low voltage (24V) on terminals 24 and C on transformer.

3. 5 Amp fuse on circuit board.

1. Common side of transformer grounded to chassis.

2. Loose spark ignitor.

1. Gas supply off or gas supply pressure too low.

2. Flame sense rod contaminated or loose wire.

3. Gas valve switch is off or wires are not connected.

4. Broken or cracked porcelain on flame probe or spark ignitor.

1. Obstructions or restrictions in appliance air intake or flue outlet are preventing proper combustion airflow.

2. Moisture or debris in tubing that connects pressure switch and draft inducer.

3. Airflow switch jumpered or miswired.

1. Open manual reset rollout switch.

2. Gas pressure too high, over fire condition.

3. Incorrect airflow due to blockage or motor not operating.

1. Flame probe miswired or shortened.

1. Thermostat is interfering with control board.

GTND-SVX01B-EN 49

Page 50

Wiring Diagrams

Figure 42. All unit sizes: UT Control board

50 GTND-SVX01B-EN

Page 51

Figure 43. Unit sizes 30–120: Natural & propane (LP)

gas with single-stage gas control & UT control board

Wiring Diagrams

Figure 44. Unit sizes 60–120: Natural and propane (LP)

gas with optional two-stage gas control and UT control board

Note: Refer to Figure 37, p. 37 through Figure 39, p. 38, Figure 43, p. 51,

and Figure 44, p. 51 for connec ting the thermostat to the unit heater . If using a standard low voltage thermostat with a sub-base switch for fan control, connect the G terminal of the thermostat to the G terminal of the unit heater.

Note: Refer to Figure 37, p. 37 through Figure 39, p. 38, Figure 43, p. 51,

and Figure 44, p. 51 for connecting the thermostat to the unit heater. If using a standard low voltage thermostat with a sub-base switch for fan control, connect the G terminal of the thermostat to the G terminal of the unit heater.

GTND-SVX01B-EN 51

Page 52

Wiring Diagrams

Figure 45. Unit sizes 150–400: Natural and propane

(LP) gas

Figure 46. Unit sizes 150–400: Optional two-stage

ignition

52 GTND-SVX01B-EN

Page 53

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.

GTND-SVX01B-EN 16 Mar 2012

Supersedes GTND-SVX01A-EN (01 Mar 2010)

We are committed to using environmentally

conscious print practices that reduce waste.

Trane Gas Unit Heaters Installation and Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Warnings, Cautions and Notices

Introduction

Model Number Descriptions

Indoor Gas Heating Units

General Information

Description

General Safety Information

Identification of Parts

Unit Dimensions and Weights

Installation: Mechanical

Air Distribution

Clearances

Nozzle Assembly

Installation: Piping

Gas Supply Piping

Pipe Sizing

Pipe Installation

Installation: Venting

Standard Combustion

Unit Sizes 30–120 Only: Vertically Vented Unit Heaters (Category III)

Separated Combustion

Unit Sizes 30–120 Only: Category III

Installation: Electrical

Electrical Connections

Thermostat Wiring and Location

Start-Up

All Unit Sizes: Operation

Power Vented Propeller Units—Direct Spark Ignition

Gas Equipment Start-Up

Maintenance

Periodic Service

How to Order Replacement Parts

Diagnostics

Troubleshooting

Wiring Diagrams