SunSpan Heaters A Series, B Series, MB Series, C Series Installation, Operation & Maintenance Instructions Manual

SQS/U SYSTEMS

Form SQ-IOM-17

600011

GAS-FIRED LOW-INTENSITY INFRARED TUBE HEATERS

SERIES: A, B, MB, and C

INSTALLATION, OPERATION, &

MAINTENANCE INSTRUCTIONS

! WARNING !

Improper installation, adjustment, alteration, service or maintenance can cause property
damage, injury or death. Read the installation, operating, and maintenance instructions
thoroughly before installing or servicing this equipment.

FOR YOUR SAFETY

• If you smell gas: open windows; don’t touch electrical switches, extinguish any open
flames; evacuate the structure; call your gas supplier immediately.

WARNING – NOT FOR RESIDENTIAL USE

• Failure to comply with instructions could result in unsafe operation, property damage,
personal injury, and/or death. A gas-fired appliance could expose you to substances in
fuel or from fuel combustion, which have been determined by the State of California to
cause cancer, birth defects or other reproductive harm. For industrial or commercial use
only.

• Contact factory for further information at 1-866-664-3824. RETAIN these instructions for
future reference.

Copyright © 2006, SunSpan

GQ pg. 2

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WARNINGS

• Protect yourself and others by observing all safety information.

WARNING CAUTION

FIRE OR EXPLOSION HAZARD

Can cause property damage, severe injury or

death.

Read manual carefully before installing, or

servicing this equipment, or serious injury or
death may result.

Check minimum clearance to combustibles to

make certain that heater is in a safe location.
Combustible items located too close to the

heater could cause a serious fire hazard. In
storage areas, signs for maximum permissible
stacking height to maintain clearance from the
heater to combustible materials must be
posted adjacent to the heater thermostats or in
the absence of such thermostats in a
conspicuous location.

Operating the heater in an atmosphere

containing combustible dust or flammable
vapors is dangerous and may potentially result
in injury or death.

Heaters must be oriented in such a way as to

maintain minimum clearances to vehicles
parked underneath them.

This heater expands and contracts with each

cycle. The installation of the gas connection
and mounting hardware must accommodate
this movement; otherwise, a fire or explosion
hazard may occur.

This heater is equipped with an automatic

ignition and does not contain a pilot. DO NOT
attempt to light the burner manually, this could

result in serious personal injury or fire hazard.

MECHANICAL HAZARD

• DO NOT use high pressure to test the gas
pipes with the burner still attached. This will
cause damage to the controls within the
burner requiring them to be replaced.

If heater is being operated in an atmosphere

with a negative pressure or an atmosphere
containing contaminants, an outside
combustion air supply is required. Failure to
provide outside combustion air may allow
excessive heat to back up to the blower wheel
and bearings severely shortening service life.

• Correct inlet pressure is important to efficiency
and long lasting operation of the burner.

The burner, tubing, and accessories expand

and contract with each cycle. The system
must be installed so that the mounting
hardware and gas line will accommodate
these changes.

All models of low-intensity heaters include a

turbulator, which must be located in the last
ten (10) feet (3.0 m) of the burner tube
[exception: 15-foot (4.6 m) units have the

turbulator in the first 10 feet (3.0 m).]

Before servicing the burner or removing the

cover panel, all electrical and gas supplies
must be disconnected.

Give consideration to construction such as

partitions, storage racks, hoists, etc., and their
relation to the installation of the heater.

The heater must be installed and serviced

ONLY by trained gas installation and service
personnel.

• Failure to follow these instructions may result in injury or property damage.

• Low-intensity heaters cannot be used in the following environments: explosion-proof, or residential

living/sleeping quarters.

• Low-intensity heaters may or may not be used in the following environments : enclosed swimming
pool, process heating, or contaminated atmosphere applications.

NOTE: Contact factory if in any doubt.

IMPORTANT

GQ pg. 3

TABLE OF CONTENTS

This instruction manual may not cover all details or variations in this equipment, or cover every
possible situation to be met in connection with installation, operation, or maintenance. Should
problems arise that are not covered sufficiently in these instructions, the purchaser is advised to
contact the engineering department for further information.

SECTION TITLES – summary of information included PAGE(S)

WARNINGS – precautions and important safety information

TABLE OF CONTENTS

INSTALLATION CODES – applicable codes and warnings; gas conversions

CANADIAN ADDENDUM – applicable codes and variances from this manual

CLEARANCE TO COMBUSTIBLES – minimum distances from heater to combustible objects
MOUNTING CONSIDERATIONS – minimum heater mounting heights, distances, angles and spacing; high

altitude considerations

OVERVIEW DRAWINGS – overview of venting, suspension, location, and typical installation

HEATER CONFIGURATIONS – possible arrangements of heat exchangers; reflector options

BASIC SYSTEM CONFIGURATIONS – straight and U-tube configurations with component identification

COMBUSTION CHAMBERS – components and specifications of combustion chambers

HEAT EXCHANGERS – components and specifications of middle and exhaust end heat exchangers

COMBUSTION AIR SUPPLY – application, construction, dimensions, and illustrations

2
3
4
5
6
7

8-9

10
11
12
13
14

EXHAUST VENTING – application, construction, dimensions, and illustrations

WINDY CONDITION NOTES – methods for suspension and notes

U-TUBE INSTALLATION – suspension and orientation of U-tube heaters

TUBE ASSEMBLY TIPS – helpful tips to assemble tubes

INSTALLATION – preparation and installation
ELECTRICAL SUPPLY AND THERMOSTATIC CONTROL – electrical ratings, schematics, 24 and 120 VAC

thermostat arrangements, illustrations

GAS SUPPLY AND GAS PRESSURE – gas piping, inlet and manifold pressures

STARTUP – procedures

MAINTENANCE – basic procedures

TROUBLESHOOTING – symptoms, possible causes and corrective actions

REPLACEMENT PARTS – exploded view and part descriptions

All rights reserved. No part of this work covered by the copyrights herein may be reproduced or copied by any means:
graphic, electronic or mechanical, including photocopying, recording, taping, information storage and retrieval systems
without written permission.

15
16

17
18-19
20-21
22-23

24

25

26

27

28

GQ pg. 4

INSTALLATION CODES

ATTENTION

Mount a copy of these instructions adjacent to heater
and retain a copy for future reference.
A limited number of excerpts from various standards
are outlined in the following instructions. However, the
installer must be familiar with all of the various
requirements and is responsible for compliance with
the applicable codes.

Gas-fired low-intensity infrared heaters are C.S.A.
International Design Certified for either indoor or outdoor
installation. If you have any questions call factory before
attempting any installation work.

Gas-fired low-intensity infrared heaters are designed
and manufactured in compliance with American National
Standards Institute standard ANSI Z83.20-latest edition.
Gas-fired low-intensity infrared heaters must be installed in
accordance with applicable codes and only by a qualified
agency. In the absence of local codes, installation must be
in accordance with the National Fuel Gas Code ANSI
Z223.1 / NFPA 54-latest edition. All electrical work must
conform to the National Electrical Code ANSI / NFPA 70 ­latest edition. The installation must meet the requirements
of the Occupational Safety and Health Act (OSHA) which
requires OSHA approved service and safety access to the
systems after they are installed.

GENERAL
All installations must be in accordance with ANSI Z223.1

/ NFPA 54 - latest edition) National Fuel Gas Code
especially:
SECTION 9.18 covers the general provisions for
installing infrared heaters. Note the requirements for
posting signs to specify the maximum permissible stacking
height to maintain required clearances from heater to
combustibles (9.18.2). Note also the exhaust requirement
of 4 CFM/1000 BTUH (.38 m3/minute/kW) when operating in
the unvented mode (9.18.3.1). (See Canadian Addendum
section herein.)
Exhaust openings for removing the flue products shall be
above the level of the heater (9.18.3.2).
SECTION 8.1.11.1 states that in commercial garages
“Gas utilization equipment installed in enclosed, basement,
or underground parking structures shall be installed in
accordance with NFPA 88A, Standard for Parking
Structures.”
SECTION 8.2 Accessibility and Clearance.
SECTION 8.3 Air for Combustion and Ventilation.

AIRCRAFT HANGARS
In aircraft hangars, the heaters must be installed in

accordance with ANSI / NFPA 409-latest edition, chapter 5.
SECTION 5-4.5.2 specifies a clearance of ten (10) feet
(3.05 m) to the bottom of the heater from the highest
surface of the wings or engine enclosures of the highest
aircraft which may be housed in the hangar.
SECTION 5-4.5.3 specifies a minimum clearance of
eight (8) feet (2.44 m) from the floor to the heater in other
sections of aircraft hangars such as offices or shops which
may communicate with areas used for servicing and
storage.

SECTION 5-4.5.4 specifies the heaters must be located so
as to be protected from damage by aircraft or other objects
such as cranes and moveable scaffolding. In addition, the
heaters must be located so as to be accessible for
servicing, adjustment, etc.

PUBLIC GARAGES

In public garages, the heaters must be installed in

accordance with National Fire Protection Association code
NFPA 88B-latest edition, Section 3-2.3.
SECTION 3-2.3.1 states that overhead heaters may be
used provided they are “located not less than eight (8) ft
(2.4 m) above the floor and installed in accordance with the
conditions of their approval.” (WARNING: Minimum
clearances indicated on the heater’s serial plate must be
maintained for vehicles parked below the heater.)
SECTION 3-2.3.2 states that “a distance shall be
maintained between the heater and its vent and any
adjacent combustible material (which is part of the building
or its contents) in conformance with NFPA 54, National Fuel
Gas Code”.

PARKING STRUCTURES

Approval requirements for parking structures are
contained in NFPA 88A-latest edition and described in
Section 4-2.

MATERIAL SAFETY DATA SHEETS (MSDS)

Gas-fired low-intensity infrared heaters comply with the
US Superfund Amendments and Reauthorization ACT
(SARA) Title III. No Material Safety Data Sheets are
required.

UL LISTING
Gas-fired low-intensity infrared heaters are design

certified by C.S.A. International for compliance with the
current American National Standard Z83.20. C.S.A.
International is the appropriate agency as they specialize in
gas appliances while Underwriters Laboratories (UL)
specialize in electric appliances.
If, however, UL were to design certify our heaters, it
would be to the same American National Standard Z83.20.
Certification by UL is not required, as it would be redundant.

LOCAL APPROVALS
Gas-fired low-intensity infra-red heaters have been

granted local approvals by such governing bodies as New
York City (A Series: MEA 232-95-E Vol. 2; B and C Series
MEA 417-86-E Vol. 5; MB Series MEA 233-95-E Vol. 2; MC
Series 233-95-E Vol. 2); City of Minneapolis, Minnesota
(#05444); the Commonwealth of Massachusetts; and the
State of Nebraska.

GAS/RATING CONVERSION OF INSTALLED HEATER

Conversions of gas type and BTUH ratings are possible.
Consult factory for proper instructions. Identify the model
and serial numbers from the serial plate located on the
exterior of the burner housing. Note the radiant tube length.
Review the systems listed in the BASIC SYSTEM
CONFIGURATIONS section of these instructions to
determine whether the installed heater can be converted as
desired.

CANADIAN ADDENDUM

NOTES TO INSTALLER

Gas-fired low-intensity infrared heaters are C.S.A. International design certified for indoor
installation onl y. They are designed and manufactured in compliance with CSA Standard for
Gas-Fired Low-Intensity Infrared Heaters, CSA 2.34-2001.

The installation must conform with local build ing c odes or, in th e abse nce of local c odes , with
the current Canadian Natural Gas and Propane Installation Code, CSA B149.1.

The electrical connection sh all com ply with th e local co des or , in the absence of loc al c odes,
with the current Canadian Electrical Code, CAN/CSA C22.1, Part I and Part II, and Electrical
Features of Fuel Burning Equipment, CAN/CSA C22.2 No. 3.

UNVENTED HEATERS

GQ pg. 5

The exhaust venting requirement is 3 CF M per 1,000 BT UH (.29 m3 per minute per kW ) for
natural gas and 4 CFM per 1,000 BTUH (.38 m

3

per minute per kW) for propane gas.

AIRCRAFT HANGARS

Gas-fired low-intensity infrared heaters are suitab le fo r use when ins talled in accor dance with
the current Canadian Natural Gas and Propane Installation Code, CSA B149.1.

COMBUSTION AIR AND EXHAUST VENTING

Vent terminal clearances shall be in accor dance with the current Canadian Natural Gas and
Propane Installation Code, CSA B149.1.

A horizontal vent shall not term inate less than 6 feet (1. 83 m) from a com bustion air inlet or
another appliance, 3 f eet (.91 m) from any other building open ing or any g as service r egulator,
or 7 feet (2.13 m) above grade and shall not terminate direct ly above a gas ut ility meter or gas
service regulator.

MANUAL SHUT-OFF VALVES

From the current Canadian Natural Gas and Propane Installation Code, CSA B149.1.

A manual shut-off valve shall be of the plug, ball, or eccentric type and it shall not be
subjected to either a temperature or a pressure greater than its certified rating.

A readily accessible m anual shut-off valve shall be install ed to control the supply of gas to
each appliance and the valve shall be loc ated, in either the drop or riser , as c lose as pos sible to
the valve train of a commercial and industrial type appliance.

GQ pg. 6

CLEARANCES

APPLICABLE FOR ALL

HEATERS*

Inches (Centimeters)

CLEARANCE TO COMBUSTIBLES*

Top, Front, and Rear clearances are measured from reflector.

Below clearance is measured from bottom of tube.

Clearance to combustibles* measurements are given in inches and (centimeters).

0° MOUNTING 1°-30° MOUNTING 31°-45° MOUNTING

TOP OF REFLECTOR

12 (31)

END OF BURNER

12 (31)

END OF U-BEND

68 (173)

SERIES MBTUH (kW)

40 (12)
45 (13)

A

MB

B

B

B / C 125 (37)

C

50 (15)
55 (16)
60 (18)
65 (19)
70 (21)
75 (22)

80 (23)
85 (25)

90 (26)

95 (28)
100 (29)
105 (31)
110 (32)
115 (34)
120 (35)

130 (38)
135 (40)
140 (41)
145 (42)
150 (44)
155 (45)
160 (47)
165 (48)
170 (50)
175 (51)

180 (53)
185 (54)
190 (56)
195 (57)
200 (59)

FRONT

BELOW

TOP

REAR

REFLECTOR WIDTH = 15.75" (40cm)

FRONT

BELOW

TOP

REAR

FRONT

BELOW

TOP

REAR

0° TO 30° REFLECTOR ANGLE 31° TO 45° REFLECTOR ANGLE

FRONT REAR BELOW FRONT REAR BELOW

40 (102) 40 (102) 40 (102) 40 (102) 12 (31) 40 (102)

50 (127) 50 (127) 50 (127) 50 (127) 12 (31) 50 (127)

24 (61) 24 (61) 60 (152)

24 (61) 24 (61) 60 (152)

32 (82) 32 (82) 72 (183)

48 (122) 48 (122) 82 (209) 70 (189) 12 (31) 82 (209)

58 (148) 58 (148) 92 (234) 80 (203) 12 (31) 92 (234)

68 (173) 68 (173) 102 (259) 90 (229) 12 (31) 102 (259)

*MINIMUM CLEARANCES specified in these tables must be maintained to combustible and other materials which may be
damaged by temperatures 90°F above (50°C above) ambient room temperature. Minimum clearances to combustibles are
also specified on each heater’s serial plate. According to the National Fuel Gas Code (NFPA 54), “in locations used for the
storage of combustible materials, signs must be posted to specify the maximum permissible stacking height to maintain
required clearances from the heater to the combustibles.” Gas supply lines, electrical supply lines, or sprinkler heads shall
not be located within the minimum clearances to combustibles indicated above.

NOTE: Carefully examine surrounding materials near the heater. Materials, such as plastic, having low service
temperature ratings can be discolored or damaged.

GQ pg. 7

•

Between Rows

MOUNTING CONSIDERATIONS

• CLEARANCE TO COMBUSTIBLES MUST BE MAINTAINED.

• Mounting heights lower than the recommended Minimum Height may be used if personnel are not

kept directly under heater.

• The Distance From Wall measurement provides the most effective heat dispersion balance
between the floors and walls.

• There is practically no limitation on a maximum mounting height.

By design, a straight infra-red heater will produce more heat at the burner end than at the exhaust

end. Locate the burner end where more heat is desired.

Reflector: Standard Parabolic

Mounting

Angle:

Input

MBTUH

(kW)

40

(12)

45-50

(13-15)

55-60

(16-18)

65-75

(19-22)

80-85

(23-25)

90-95

(26-28)

100-105

(29-31)

110-115

(32-34)

120
(35)

125
(37)
130
(38)

135-140

(40-41)

145
(42)
150
(44)

155-160

(45-47)

165-170

(48-50)

175-180

(51-53)

185-190

(54-56)

195-200

(57-59)

Horizontal 30º - 45º Horizontal 30º - 45º Horizontal 30º - 45º Horizontal 30º - 45º

Minimum Height

(2.9)

10.0

(3.0)

10.5

(3.2)

11.0

(3.4)

11.5

(3.5)

12.0

(3.7)

12.5

(3.8)

13.0

(4.1)

13.5

(4.1)

14.0

(4.3)

14.5

(4.4)

15.0

(4.6)

15.5

(4.7)

16.0

(4.9)

16.5

(5.0)

17.0

(5.2)

17.5

(5.3)

18.0

(5.5)

18.5

(5.6)

9.5

ft

(m)

7.5

(2.3)

8.0

(2.4)

8.5

(2.6)

9.0

(2.7)

9.5

(2.9)

10.0

(3.0)

10.5

(3.2)

11.0

(3.4)

11.5

(3.5)

12.0

(3.7)

12.5

(3.8)

13.0

(4.0)

13.5

(4.1)

14.0

(4.3)

14.5

(4.4)

15.0

(4.6)

15.5

(4.7)

16.0

(4.9)

16.5

(5.0)

Distance From Wall

6

(1.8)

6

(1.8)

6

(1.8)

8

(2.4)

8

(2.4)

8

(2.4)

8

(2.4)

12

(3.7)

12

(3.7)

12

(3.7)

12

(3.7)

12

(3.7)

12

(3.7)

12

(3.7)

13

(4.0)

13

(4.0)

14

(4.3)

14

(4.3)

15

(4.6)

ft

(m)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

Minimum Height

11.5

(3.5)

12.0

(3.7)

12.5

(3.8)

13.0

(4.0)

13.5

(4.1)

14.0

(4.3)

14.5

(4.4)

15.0

(4.6)

15.5

(4.7)

16.0

(4.9)

16.5

(5.0)

17.0

(5.2)

17.5

(5.3)

18.0

(5.5)

18.5

(5.6)

19.0

(5.8)

19.5

(5.9)

20.0

(6.1)

20.5

(6.2)

ft

(m)

9.5

(2.9)

10.0

(3.0)

10.5

(3.2)

11.0

(3.4)

11.5

(3.5)

12.0

(3.7)

12.5

(3.8)

13.0

(4.1)

13.5

(4.1)

14.0

(4.3)

14.5

(4.4)

15.0

(4.6)

15.5

(4.7)

16.0

(4.9)

16.5

(5.0)

17.0

(5.2)

17.5

(5.3)

18.0

(5.5)

18.5

(5.6)

Distance From Wall

HIGH ALTITUDE

4

(1.2)

4

(1.2)

4

(1.2)

6

(1.8)

6

(1.8)

6

(1.8)

6

(1.8)

9

(2.7)

9

(2.7)

9

(2.7)

9

(2.7)

9

(2.7)

9

(2.7)

9

(2.7)

10

(3.0)

10

(3.0)

11

(3.4)

11

(3.4)

12

(3.7)

ft

(m)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

1

(0.3)

Standard &

Parabolic

Horizontal &

30º - 45º

Max. Distance

ft

(m)

80

(24.4)

80

(24.4)

80

(24.4)

80

(24.4)

90

(27.4)

95

(29.0)

95

(29.0)

100

(30.5)

100

(30.5)

105

(32.0)

105

(32.0)

105

(32.0)

105

(32.0)

105

(32.0)

105

(32.0)

110

(33.5)

110

(33.5)

115

(35.1)

115

(35.1)

If a heater is to be installed at a high altitude, in excess of two thousand feet (610 m) above sea level,
consult the factory (U.S. & CANADA).

GQ pg. 8

OVERVIEW DRAWINGS (1 OF 2)

WHEN GAS PRESSURE EXCEEDS
14" (35cm) W.C., A FIRST STAGE
REGULATOR MUST BE INSTALLED

5"

(13cm)

15"
(38cm)

6.5"

(17cm)

GAS CONNECTION DIAGRAM

ALL HANGING CHAINS MUST BE PLUMB

AND VERTICAL IN ALL DIRECTIONS WHEN

VENT CAP
MUST BE
6 IN. (15cm)
HIGHER THAN
SNOW DEPTH

ROOF

FLASHING

(NOT

SUPPLIED)

INITIALLY INSTALLED

DISTANCE FROM

SUSPENSION POINT

TO TOP OF COVER

PLUS 6" (15cm)

SLACK = LENGTH OF

SAFETY CHAIN

BURNER

1/2" (1.27cm) O.D.

FLEXIBLE GAS
CONNECTOR
24" (61cm) LONG
STAINLESS STEEL

12"(30cm) MIN.

CLEARANCE

GAS COCK
(SUPPLIED BY OTHERS)

4 FT. (1.2m)

29 IN.

(74cm)

12 IN.

(31cm)

17 IN.

(43cm)

LOCAL CODES MAY REQUIRE
AN ADDITIONAL SHUT-OFF
COCK BE INSTALLED IN THE
GAS LINE AHEAD OF THE DRIP LEG

VENT CAP MUST BE

6" (15cm) HIGHER

THAN SNOW DEPTH

DRIP LEG

"B" VENT

PIPE ADAPTOR

HANGER BRACKETS MUST BE
SPACED AT LEAST 4 FT. (1.2m) APART
WITH (2) BRACKETS FOR EVERY
SECTION OF RADIANT TUBING

MIN.

8FT.

(2.4m)

MAX.

HEAT EXCHANGER 4 IN.
(10.2cm) O.D. X 5 OR 10 FT.
(1.5m OR 3.0m) LONG

REFLECTOR
INDEPENDENTLY ADJUSTABLE

COMBUSTION CHAMBER
4 IN. (10.2cm) O.D. X 10 FT. (3m) LONG

ADDITIONAL COMBUSTION AIR SUPPLY
SINGLE WALL 26 GA. (.044cm) MINIMUM
GALVANIZED SHEET METAL PIPE OR
SCHEDULE 40 PVC (SEAM TO BE AT TOP)
(NOT SUPPLIED)

2 FT. (61cm) MINIMUM
CLEARANCE ABOVE OR
BEYOND THE HIGHEST
STRUCTURE OF
SURFACE WITHIN
10 FT. (3m)
OF THE VENT

INLET AIR SLEEVE

(SEAM TO BE ON TOP)

4 IN. (10.2cm) I.D. FLEX DUCT

18 IN. (46cm) LONG WITH

SUPPLY PIPING MUST NOT EXCEED AN EQUIVALENT

OF 35 LINEAR FT. (10.7m) FOR 40-125 MBTUH (12-37kW)

OR 40 LINEAR FT. (12.2m) FOR 130-200 MBTUH (38-59kW).

NO MORE THAN TWO 90° ELBOWS MAY BE USED.

A 90° ELBOW IS EQUIVALENT TO 10 LINEAR FT. (3m).

(2) HOSE CLAMPS

(PROVIDED BY OTHERS)

4" B-VENT ADAPTOR

INLET AIR CAP

(OPTIONAL
ACCESSORY)

INLET AIR BOX
(ALTERNATE
OPTIONAL

ACCESSORY)
USE APPROPRIATE
FASTENERS
(NOT SUPPLIED)

OVERVIEW DRAWINGS (2 OF 2)

GQ pg. 9

BURNER

SAFETY
CHAIN

BURNER

FINAL
SUSPENSION
POINT

MAINTAIN 18 IN. (46cm) MINIMUM
CLEARANCE TO COMBUSTIBLES
FOR ENTIRE LENGTH OF PIPING

ADDITIONAL EXHAUST VENT PIPING 4" (10.2cm) I.D.
SINGLE WALL 26 GA. (.044cm) MINIMUM GALVANIZED
SHEET METAL (OR OTHER FACTORY-APPROVED
MATERIALS) (SEAM TO BE ON TOP) (NOT SUPPLIED)
MUST NOT EXCEED AN EQUIVALENT OF 35 LINEAR FT.
(10.7m) FOR 40-125 MBTUH (12-37kW) OR 40 LINEAR
FT. (12.2m) FOR 130-200 MBTUH (38-59kW). NO MORE
THAN 2 ELBOWS MAY BE USED. A 90° ELBOW IS
EQUIVALENT TO 10 LINEAR FT. (3m). A 45° ELBOW IS
EQUIVALENT TO 5 LINEAR FT. (1.5m).

2 FT. (61cm) MIN.

WALL BRACE

REFLECTOR

FLOW OF HOT GASES

SUSPENSION BRACKET
AROUND BURNER
COUPLER

4"(10.2cm)
VENT CAP
ASSEMBLY

WALL
VENTING

KIT

OPTIONAL COMMON VENTING THROUGH ROOF OR WALL

TUBE WELD SEAM
ON TOP

HEAT EXCHANGER MOUNTING ARRANGEMENT

#12 TEK SCREW
4 PLACES

BURNER

BURNER COUPLER MOUNTING ARRANGEMENT

#12 TEK SCREW

WELD SEAM TO BE AT TOP

COMBUSTION CHAMBER

BURNER COUPLER

FOR ALL JOINTS RTV
SILICONE ADHESIVE
SEALANT SHOULD BE
USED TO PREVENT
LEAKAGE OF HOT
FLUE GASSES.

4" x 4" x 5" Y-COUPLER

(10 x 10 x 13cm) (OPTIONAL ACCESSORY)

BOTH HEATERS MUST BE CONTROLLED

BY A SINGLE THERMOSTAT

TUBE WELD SEAM

ON TOP

3.0" (7.6cm) MIN.

4.0" (10.2cm) MAX.

NEVER USE

A STRAIGHT
THROUGH TEE

USE APPROPRIATE FASTENER (NOT SUPPLIED)
FOR ATTACHING TO BUILDING MATERIAL

FOR ALL INDOOR VENT JOINTS: USE RTV SEALANT TO PREVENT HOT FLUE GAS LEAKAGE INTO THE
BUILDING (USE A SHEET METAL PIPE AND CRIMPER FOR JOINING IDENTICAL SIZE SHEET METAL PIPES),
USE THREE (3) #6 SHEET METAL SCREWS (SMS) PER VENT PIPE JOINT. THE VENT PIPE SEAM SHOULD
BE ON TOP WITH ONE SMS ON TOP AND ONE SMS 120 DEGREES FROM THE TOP ON EACH SIDE.

(3) 90 DEGREE BRACES EQUALLY SPACED

FOR COMBUSTIBLE WALLS ONLY USE A 2" (5.1cm) CLEARANCE NON-COMBUSTIBLE VENTILATING
METAL THIMBLE (NOT SUPPLIED). FOR NON-COMBUSTIBLE WALLS ONLY 4.25" (10.8cm) DIA. HOLE FOR

4" (10.2cm) O.D. PIPE ADD NON-COMBUSTIBLE PROTECTION AROUND THE HOLE IF NECESSARY.

CAUTION

• The first twenty (20) feet (6.1 m) of radiant tube extending from the burner
MUST be installed straight.

• There is one exception. A U-Tube heater may have a 180 degree U-bend
interposed AFTER the first ten (10) feet (3.0 m).

• Electrical wiring diagrams can be found in the ELECTRICAL SUPPLY
AND THERMOSTATIC CONTROL section.