Superior Radiant LA-40, LXR-40, LA-60, LX-40, LX-60 Installation, Operation And Service Instructions

Series LA/LX/LXR Infrared Heater

WARNING

FOR YOUR SAFETY

If you smell gas:

1. Open windows

2. Don’t touch electrical switches

3. Extinguish any open flame

4. Immediately call your gas supplier

FOR YOUR SAFETY

Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.

Si vous sentez une odeur de gaz:

1. Ouvrez les fenetres

2. Ne touchez pas aux interupteurs
electriques

3. Eteignez tout flamme nue

4. Contactez immediatment votre
fournisseur de gaz

CONSIGNES DE SECURITE

CONSIGNES DE SECURITE

Installation, Operation and Service Instructions

Il est interdit d‘utiliser des liquides

inflammables ou degageant des vapeurs

inflammables, a proximites de tout appareil

fonctionnent au gaz.

Read and thoroughly understand these Instructions before attempting any installation.

Improper installation, adjustment, alteration, service or maintenance can cause injury, death or property

damage. Read the installation, operation and service instructions thoroughly before installing or servicing

Series LA/LX/LXR Page 1 Feb 11th 2015 LT016

563Barton Street, Stoney Creek, Ontario L8E 5S1

Installer

Owner

Retain this Manual for reference.

this equipment.

www.superiorradiant.com

CAUTION: FIRE OR EXPLOSION HAZARD

Maintain clearance to combustible constructions as further specified in this manual. Failure
to do so could result in a serious fire hazard. Heaters should not be located in hazardous
atmospheres containing flammable vapors or combustible dusts. Signs should be provided in
storage areas specifying maximum safe stacking height.

CAUTION: MECHANICAL HAZARD

This equipment expands and contracts with each operating cycle. The gas connection,
suspension hardware and the installation itself must safely allow this movement. Failure to
do so could result in serious fire or explosion hazard.

CAUTION: FIRE OR EXPLOSION HAZARD

This heater is equipped with an automatic ignition device. Do not attempt to light the burner
by hand. Failure to comply could result in a serious fire and personal injury hazard.

CAUTION: MECHANICAL HAZARD

Do not use high pressure (above 1/2 psi) to test the gas supply system with the burners
connected. Failure to do so could result in damage to the burner and its control components
requiring replacement.

CAUTION: SERVICE LIFE RISK

Do not install equipment in atmospheres containing halogenated hydrocarbons or other
corrosive chemicals. Failure to do so may lead to premature equipment failure and
invalidation of the warranty. Additionally, it is recommended that the equipment be installed
with a slope downward and away from the burner of ¼" in 10' to allow start-up condensate
drainage.

Series LA/LX/LXR Page 2 Feb 11th 2015

Table of Content

INTRODUCTION ...................................................................................................................................................................... 4

INSTALLATION CODES ...................................................................................................................................................................... 4

General Installation and Gas Codes ...................................................................................................................................... 4

Aircraft Hangar Installation .................................................................................................................................................. 4

Public Garage Installation ..................................................................................................................................................... 4

Parking Structures................................................................................................................................................................. 4

Gas Supply Lines ................................................................................................................................................................... 5

Electrical ............................................................................................................................................................................... 5

Venting ................................................................................................................................................................................. 5

GENERAL SPECIFICATIONS ..................................................................................................................................................... 6

GAS SUPPLY .................................................................................................................................................................................. 6

Inlet Pressure ........................................................................................................................................................................ 6

Manifold Pressure ................................................................................................................................................................. 6

Inlet Connection .................................................................................................................................................................... 6

ELECTRIC SUPPLY ............................................................................................................................................................................ 6

FLUE AND OUTSIDE AIR CONNECTION ................................................................................................................................................ 6

DIMENSIONAL CHARTS .......................................................................................................................................................... 7

CONFIGURATIONS .................................................................................................................................................................. 8

CLEARANCE TO COMBUSTIBLES ............................................................................................................................................. 9

INSTALLATION...................................................................................................................................................................... 12

INSTALLATION SEQUENCE ............................................................................................................................................................... 12

VENTING / COMBUSTION AIR DUCTING ............................................................................................................................... 29

GENERAL REQUIREMENTS .............................................................................................................................................................. 29

UN-VENTED OPERATION ............................................................................................................................................................... 29

VENTED OPERATION ..................................................................................................................................................................... 30

Horizontal Venting .............................................................................................................................................................. 30

Vertical Venting .................................................................................................................................................................. 30

Common Vertical Venting ................................................................................................................................................... 30

Common Horizontal Venting............................................................................................................................................... 31

COMBUSTION AIR SUPPLY (OPTIONAL) ............................................................................................................................................. 32

OUTDOOR INSTALLATION .................................................................................................................................................... 33

GAS PIPING .......................................................................................................................................................................... 34

GENERAL REQUIREMENTS .............................................................................................................................................................. 34

ELECTRICAL WIRING ............................................................................................................................................................. 35

GENERAL REQUIREMENTS .............................................................................................................................................................. 35

LXR WIRING ONLY ....................................................................................................................................................................... 36

BURNER OPERATION ............................................................................................................................................................ 37

STARTING SEQUENCE OF OPERATION ............................................................................................................................................... 37

MAINTENANCE ............................................................................................................................................................................ 37

TROUBLESHOOTING ............................................................................................................................................................. 38

BLOWER MOTOR FAILS TO RUN ...................................................................................................................................................... 38

NO GAS SUPPLY ........................................................................................................................................................................... 38

BURNER DOES NOT LIGHT .............................................................................................................................................................. 38

BURNER DOES NOT STAY LIT .......................................................................................................................................................... 38

TROUBLESHOOTING CHART ............................................................................................................................................................ 39

REPLACEMENT PARTS .......................................................................................................................................................... 40

WARRANTY .......................................................................................................................................................................... 41

Series LA/LX/LXR Page 3 Feb 11th 2015

Important

These instructions, the layout drawing, local codes and ordinances, and applicable standards such as
apply to gas piping and electrical wiring comprise the basic information needed to complete the
installation, and must be thoroughly understood along with general building codes before proceeding.

Only personnel who have been trained and understand all applicable codes should undertake the
installation. SRP Representatives are Factory Certified in the service and application of this
equipment and can be called on for helpful suggestions about installation.

Introduction

Superior Radiant Products is a company in the infrared heating industry founded on the principles of
product quality and customer commitment.

Quality commitments are evidenced by superior design, a regard for design detail and an upgrade of
materials wherever justifiable.

Customer commitment is apparent through our ready responses to market demands and a never ending
training and service support program for and through our distributor network.

Superior Radiant offers its 15 years of infrared expertise in a cost effective unitary heater design as
culmination of that commitment. Series LA/LX/LXR models are field assembled, low intensity infrared
heaters that are easy to install and maintain, and which were engineered with significant input from our
customers. They are designed to provide economical operation and trouble-free service for years to come.

Installation Codes

Installations must comply with local building codes, or in their absence, the latest edition of the national
regulations and procedures as listed below.

General Installation and Gas Codes

Heaters must be installed only for use with the type of gas appearing on the rating plate, and the
installation must conform to the National Fuel Gas Code, ANSI Z223.1/NFPA 54 in the US and
CAN/CGA B149.1 and B149.2 Installation Codes in Canada.

This heater maybe approved for either indoor or outdoor installation. Not for use in residential dwellings,
refer to Rating plate.

Aircraft Hangar Installation

Installation in aircraft hangars must conform to the Standard for Aircraft Hangars, ANSI/NFPA 409 in the
US and CAN/CGA B149.1 and B149.2 Installation Codes in Canada.

Public Garage Installation

Installation in public garages must conform to the Standard for Parking Structures, NFPA-88A or

Standard for Repair Garages, NFPA 88B, in the US and CAN/CGA B149.1 and B149.2 Installation
Codes in Canada.

Parking Structures

Technical requirements are outlined in ANSI/NFPA 88B (USA)

Series LA/LX/LXR Page 4 Feb 11th 2015

Introduction

Gas Supply Lines

Gas supply pipe sizing must be in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54
in the US and CAN/CGA B149.1 and B149.2 Installation Codes in Canada.

A 1/8" inch NPT plugged tap must be installed in the gas line connection immediately upstream of the
burner farthest from the gas supply meter to allow checking of system gas pressure.

Electrical

All heaters must be electrically grounded in accordance with the National Electric Code, ANSI/NFPA 70
in the US, and the Canadian Electric Code, CSA C22.1 in Canada, and must comply with all local
requirements.

Venting

Refer to the National Fuel Gas Code, ANSI Z223.1/NFPA 54 in the US and CAN/CGA B149.1 and
B149.2 Installation Codes in Canada for proper location, sizing and installation of vents as well as
information on clearance requirements when penetrating combustible walls for venting purposes.

Series LA/LX/LXR Page 5 Feb 11th 2015

General Specifications

General Specifications

Gas Supply

Inlet Pressure

Natural Gas:

Minimum
Maximum

5.0" W.C.

14.0" W.C.

Propane Gas:

Minimum
Maximum

11.5" W.C.

14.0" W.C.

Manifold Pressure

Natural Gas:

3.5" W.C.

Propane Gas:

10.5" W.C.

Inlet Connection

Natural Gas or Propane: 1/2" female NPT

Electric Supply

120 VAC, 60 HZ, 1 Amp: 36"cord with grounded 3 prong plug

Flue and Outside Air Connection

4" O.D. male connection for flue adapter and outside air (optional) provided at the heater

Series LA/LX/LXR Page 6 Feb 11th 2015

Dimensional Charts

14"

36"

12"

12"

9"

15"

16"

6"

10' - 4"

10'

24"

18"

U-BEND

24"

18"

ELBOW

16"

WHEN INSTALLING, ORIENT
BAND CLAMP LOCK BOLTS
TO TOP, AT 10 O'CLOCK
OR 2 O'CLOCK POSITION

COUPLING

12"

10' - 4"

TUBE

10'

4', 6' OR 8'

REFLECTOR

BAFFLE SECTION

INSERT

4'

Figure 1:Overall Dimensional Information

Figure 2: Component Dimensional Information

Series LA/LX/LXR Page 7 Feb 11th 2015

Configurations

Model

High Rate
(BTU/Hr)

Heat Exchanger Length

(ft.)

Baffle

Length (ft.)

Minimum

Maximum

LA/LX/LXR-40

40,000

30'

40'

12'

LA/LX/LXR-60

60,000

30'

50'

12'

LA/LX/LXR-80

80,000

40'

60'

6'

LA/LX/LXR-100

100,000

50'

50'

Three 4’ lengths

3"

Burner
Assembly

Gasket

Tube
Flange

4'

4'

Combustion

Tube

Make sure two 4' inserts are

installed into combustion

tube as illustrated.

The two inserts should be

butted next to each other.

The insert closest to the

burner flange should be 3"

in from the end (as shown).

Inserts

P/N UT003

QTY (2)

Table 1: Configuration Information

Note:

- Baffles are always placed in the last section of radiant tube except for the 100,000 BTU Burner.

- Baffles are either aluminized or stainless steel sections 6' long.

- When only 6' is required (80,000 BTU), an aluminized steel baffle is installed.

- When 12' is required (40,000 or 60,000 BTU) the aluminized steel baffle is lengthened forward

(toward the burner) with a 6' stainless steel section.

- In the case of a 100,000 BTU system, place 4' sections of baffle in the end of each of the last 3

10'sections of tube.

Part numbers for reference are:

CT026 Baffle 4' long aluminized steel.
CT007 Baffle 6'long aluminized steel.
CT006 Baffle extension, 6' long stainless steel.

Insert (may be a factory installed, CHECK FOR ORIENTATION)

To further improve heat distribution along the length of the heater, two stainless inserts may be installed
at factory, check for correct orientation. The inserts will reduce heat output in the first tube, which results
in more heat release in the latter part of the heat exchanger. (See Figure 3)

Series LA/LX/LXR Page 8 Feb 11th 2015

0-1"

Burner
Assembly

Gasket

Tube
Flange

4'

4'

Combustion

Tube

Make sure two 4' inserts are

installed into combustion

tube as illustrated.

The two inserts should be

butted next to each other.

The insert closest to the

burner flange should be 3"

in from the end (as shown).

Inserts

P/N UT003

QTY (1)

Inserts

P/N UT017

QTY (1)

Series 750 Configurations

The following special configurations are also approved to comply with NFPA 30 A and NFPA 54
where maximum tube temperature is below 750°F.

60,000 BTU/Hr 30 ft. or 40 ft. with 12 ft. baffle (2 – 6 ft sections, 1aluminized and 1 stainless). The

first 3 tubes (30 ft.) are black coated. Part number for reference TH30LC. The
remaining tubes will be heat treated aluminized (grey). Natural gas only.

100,000 BTU/Hr 60 ft. with 6 ft aluminized baffle. The first 3 tubes (30 ft.) are black coated. Part

number for reference TH30LC. The remaining tubes will be heat treated
aluminized (grey). Natural gas only.

Insert should be factory , CHECK FOR OREINTATION.

To help keep the temperature down in the combustion tube, 2 different stainless steel inserts are installed.

please refer to figure below 3a for more information. IT IS VERY IMPORTANT TO MAKE SURE

PROPER INSTALLATION OF THE INSERTS

Figure 3a: Stainless Steel Insert Installation

Series LA/LX/LXR Page 9 Feb 11th 2015

Clearance to Combustibles

Note 1:
Bottom Shields are approved for all burner sizes. The “below” clearance (dimension C in Table 2)
may be reduced by 25% when an approved Bottom Shield is used.

Note 2:

Reduced clearances downstream from the burner are approved for all configurations. Dimensions “B”,

“C”, and “D” in Table 2can be reduced for locations 25' (7.6 m) or more downstream from a burner,

before the next burner, maximum reduction is 50%

A general clearance of 18” (0.5 m) in every direction is recommended for servicing only around each
Burner, Vacuum Pump, and End Vent Cap air supply (at the far end of each Radiant Branch) also to
ensure adequate air flow in and around the Heating System.

In addition to this it is very important to observe the minimum clearance to combustibles at all
times to avoid any possibility of property damage or personal injury.

WARNING

 Clearances as marked on the heater body must be maintained from vehicles parked beneath. Signs

should be posted identifying any possible violation of the clearance distances from the heater in all
vehicle areas.

 Maximum allowable stacking height in storage areas should be identified with signs or appropriate

markings adjacent to the thermostat or in a conspicuous location.

Table 2lists the minimum clearance to combustible materials for various installation configurations. Note
that standard clearances also apply to installation above T-bar ceilings and above decorative grills.
Additional clearance may be required for glass, painted surfaces and other materials which maybe
damaged by radiant or convective heat.

Combustible materials are considered to be wood, compressed paper, plant fibres, plastics, Plexiglas or
other materials capable of being ignited and burned. Such materials shall be considered combustible
even though flame-proofed, fire-retardant treated or plastered.

Elbows and U-bends are un-heat treated aluminized material and are typically installed without reflectors.
Reflector miter kits are available for U-bends and elbows.

Adequate clearance to sprinkler heads must be maintained.

The stated clearance to combustibles represents a surface temperature of 90°F (50°C) above room
temperature. Building materials with low heat tolerance (such as plastics, vinyl siding, canvas, tri-ply,
etc…) maybe subject to degradation at lower temperatures. It is the installer’s responsibility to assure

that adjacent materials are protected from degradation.

Series LA/LX/LXR Page 10 Feb 11th 2015

Clearance to Combustibles

Model No.: LA/LX/LXR

Reflector Configurations

Dim

40

60

80

100

Horizontal

A

C

DB

A
B
C
D

2"
4"

31"

4"

2"
4"

31"

4"

2"
4"

31"

4"

2"
6"

36"

6"

45° Reflector Tilt

D

A

B

C

A
B
C
D

3"

3"
18"
18"

3"

3"
18"
18"

3"

3"
18"
18"

4"

3"
20"
20"

One Side Extension

D

A

C

B

A
B
C
D

2"
2"

35"

6"

2"

2"
35"

6"

2"

2"
35"

6"

2"

3"
36"

6"

Two Side Extension

D

A

B

C

A
B
C
D

2"
2"

38"

2"

2"

2"
38"

2"

2"

2"
38"

2"

2"

3"
38"

3"

U-Tube, Horizontal

D

A

B

C

A
B
C
D

2"
4"

32"

4"

2"

4"
32"

4"

2"

4"
32"

4"

2"

6"
38"

6"

U-Tube, Opposite 45°

D

A

B

C

A
B
C
D

3"
18"
18"
18"

3"
18"
18"
18"

3"
18"
18"
18"

4"
20"
20"
20"

Unvented

Above

End

12"
26"

12"
26"

18"
26"

18"
26"

Vented

End

18"

18"

18"

18"

Table 2: Minimum Clearance to Combustibles

Series LA/LX/LXR Page 11 Feb 11th 2015

Installation

LA / LX / LXR 60,000 BTU

30' Long

For 40' and 50' Heaters follow the same sequence. The 12' baffle is
Installed in the last sections of tube.

Combustion

Non Heat Treated

(Silver Color)

Tube

Non Heat Treated

(Silver Color)

Tube

Heat Treated

(Grey Color) Tube

LA / LX / LXR 40,000 BTU

3"

Loose

Screws

Fasten Endcap

with Screws

Reflector Overlap
Approx. 8"

Burner
Assembly

Tight

Screws

Gasket

Tube
Flange

Install "J" Bolt
at first hanger

Loose

Screws

Reflector

End Cap

Tight

Screws

Bend Tab

over End

of Tube

Vent

Adapter

Tube

Coupling

Install 12' Baffle

Lock Together)

Tube & Reflector

Hangers

Close all chain links
"S" hooks, "J" bolts
and turnbuckles or
any open connection.

Installation Sequence

Generally, there is no unique sequence for installation of the burner or heat exchanger. A review of the
job site will usually indicate a logical installation order. However, time and expense can be saved if
installation is begun at the most critical dimension, watching for interference from overhead doors,
cranes, auto lifts etc. Figure 4 to Figure 6provides a general overview of the components utilized in the
installation, as well as their general relationship.

Figure 4: Installation Configurations for 40,000 & 60,000 BTU Models

Series LA/LX/LXR Page 12 Feb 11th 2015

Installation

Tube & Reflector

Hangers

Install 6' Baffle

Tube

Coupling

Vent

Adapter

Bend Tab

over End

of Tube

Reflector

Support

Loose

Screws

Tight

Screws

Reflector

End Cap

Loose

Screws

Install "J" Bolt

at first hanger

Tube

Flange

Gasket

3"

Burner

Assembly

Reflector Overlap

Approx. 8"

Fasten Endcap

with Screws

Loose

Screws

LA/LX/LXR 80,000 BTU

40' Long

For 50' Heater follow the same sequence. The baffle is

Installed in the last sections of tube.

Combustion

Non Heat Treated

(Silver Color)

Tube

Non Heat Treated

(Silver Color)

Tube

Heat Treated

(Grey Color) Tube

Tight

Screws

Loose

Screws

Heat Treated

(Grey Color) Tube

Close all chain links

"S" hooks, "J" bolts

and turnbuckles or

any open connection.

Figure 5: Installation Configuration for 80,000 BTU Model

Series LA/LX/LXR Page 13 Feb 11th 2015

Installation

Tube & Reflector

Hangers

Tube

Coupling

Vent

Adapter

Bend Tab

over End

of Tube

Reflector

Support

Loose

Screws

Tight

Screws

Reflector

End Cap

Loose

Screws

Install "J" Bolt

at first hanger

Tube

Flange

Gasket

3"

Combustion

Non Heat Treated

(Silver Color)

Tube

Tight

Screws

Burner

Assembly

Reflector Overlap

Approx. 4 to 8"

Fasten End cap

with Screws

Loose

Screws

Tight

Screws

Loose

Screws

Loose

Screws

Non Heat Treated

(Silver Color)

Tube

4' Baffle

4' Baffle

4' Baffle

Heat Treated

(Grey Color) Tube

LA/LX/LXR 100,000 BTU

50' Long

For 60' Heater follow the same sequence. The baffles are

Installed in the last three sections of tube.

Heat Treated

(Grey Color) Tube

Heat Treated

(Grey Color) Tube

Close all chain links

"S" hooks, "J" bolts

and turnbuckles or

any open connection.

Figure 6: Installation Configuration for 80,000 BTU Model

Series LA/LX/LXR Page 14 Feb 11th 2015

Installation

Combustion

Tube

Heat Exchanger

3"

Loose

Screws

Fasten Endcap

with Screws

Reflector Overlap
Approx. 8"

Burner
Assembly

Tight

Screws

Gasket

Tube

Flange

Install "J" Bolt
at first hanger

Loose

Screws

Reflector

End Cap

Tight

Screws

Bend Tab

over End

of Tube

Vent

Adapter

Tube

Coupling

Tube & Reflector

Hangers

Tube

**Install Baffle(s) as required
in the last section of tube or
as specified in this manual

Close all chain links
"S" hooks, "J" bolts
and turnbuckles or
any open connection.

In 100,000 BTU systems, place 4' baffles in

the last 3 ten foot tube lengths as shown.

A general ordered sequence for installation is provided below for reference.

HANGERS INSTALLATION

 Suspension mechanism must allow for lateral tubing expansion. A minimum 12" inch length

welded link chain with a working load limit of at least 200 lbs. is recommended (refer to Figure
8for more details).SRP recommends and make available “quick links” for connecting chain.

If any open ended “S” hooks and turnbuckles are used, the open ends must be closed to
avoid unhooking chain with inadvertent contact.

Figure 7: General Overview of Installation

 Locate hanging chain at predetermined suspension points in the structure. It is required that the

first 2 hangers be about 8' to 9' away. Thereafter, 10' apart on average is acceptable for the

remainder of the heat exchanger. At no time should hangers be more than 12' apart, (seeFigure 9).

Series LA/LX/LXR Page 15 Feb 11th 2015

Installation

Concrete Beam

Turnbuckle

Beam Clamp

24"

Min.

3/8"
Threaded
Rod

I-Beam

I-Beam

12"

Min.

Anchor

Chain link

12"

Min.

Truss

Eye Bolt

Note:
Close all "S" hooks,
chain links, "J" bolts
and turnbuckles or
any open connection.

8' to 9'

10'

10'

Burner
Side
"First Hanger"

Venting
Side
"Last Hanger"

Close all open ended
"S" hooks, chain links
and turnbuckles or any
open connection.

Figure 8: Suspension Mechanism

 Install the tube and reflector support hanger on the chain with “S-hooks” refer to Figure 8&Figure

9.

 Place the first (flanged, aluminized) tube in the first two hangers (Figure 10). Be sure the flange is

Series LA/LX/LXR Page 16 Feb 11th 2015

toward the intended burner location. The other end of the tube should have the first coupling
already loosely fitted.

Figure 9: Hanging Points

Installation

8' - 9'

Tube & Reflector

Hangers

Combustion

Tube

Coupling Should Be

Loosely Fitted

Locate Tube and

Reflector Hangers

every 10' thereafter.

10'

Tube
Flange

2"-8"

10'

Install "J" Bolt
at first hanger

Tube Weld
Seam Facing

Down

Close all open ended
"S" hooks, chain links,
and turnbuckles or any
open connection.

10'

Close all open ended
"S" hooks, chain links,
and turnbuckles or any
open connection.

Coupling

(loosely fitted)

Heat

exchanger

tube

Tube weld
seam facing
down

TUBE INSTALLATION

 Always use all the hangers supplied. As a rule the combustion tube (first tube) utilizes 2 hangers

and thereafter 1 hanger per 10' section. It is required that the first hanging point be 2" to 8"
from the burner mounting flange, and tube weld seam must face down, refer to Figure 10for
more details.

Figure 10: Installation of First section of Flanged Tube

 For all remaining tubes, fit the end of the tube with a coupling refer toFigure 11, (the coupling

should be loose).

Series LA/LX/LXR Page 17 Feb 11th 2015

Figure 11: Installation of Heat Exchanger Tube and Coupling

Installation

Installation of Reflector Hangers

and "J" Bolt

Place Tube in the
Reflector Hanger
as shown.

Reflector Hanger

Install "J" Bolt at the
First Hanger Only.

When Installing, Orient
Band Clamp Lock Bolts
to Top, at 10 o'clock
Or 2 o'clock Position to
Avoid Contact with the
Reflector.

Tube weld

seam

Tube

weld

seam

Installation of Tube Coupling

Torque to 15-25 ft.-lbs

Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

 Tighten the cradle loops of the first hanger with the “J-Bolt” found in the burner box, to snugly

hold the combustion tube from rotating see Figure 12.

Note: For all coupling joints, ensure that the tube joint is in the center of the coupling
length, and that the overlap joint of the coupling is above the centerline of the tube. Also
ensure that the weld seam on ALL tubes is facing down.

Note: In order to obtain smoothly sealed coupling liners, tighten each of the coupling
bands progressively and alternately. Tightening one band completely before the other may
result in an undesirable wrinkle in the liner (refer to Figure 12).Be sure not to over torque
the coupling. (Torque coupling to 15-25 lbf-ft).

Figure 12: “J” and Coupling Bolt Installations

 Continue placing tubes, couplings and reflectors to complete the heater assembly. Ensure heat

exchanger sections line up straight. Couplings should be tightened as heat exchanger is placed,
since it is more difficult to do so once the reflector is in position.

Series LA/LX/LXR Page 18 Feb 11th 2015

Installation

Bend Tab

over End

of Tube

at 6 O'clock

position

Vent

Adapter

Install Baffle

as required in

last section

of tube

Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

Burner

Assembly

Gasket

Tube
Flange

Note:
Close all open ended "S" hooks, chain links,

and turnbuckles or any open connection.

Note:
Burner MUST NEVER be
tilted sideways.
Only install as shown.

HEATER AND BAFFLE INSTALLATION

 Locate the burner gasket provided, bolt the burner in place on the tube flange with provided

hardware. Burner must never be installed in a tilted position. The sense electrode of the burner
cup should be in the 12 o’clock position (Figure 13).

Figure 13: Burner Gasket Installation

 If required for your heater model (refer to Table 1), install the baffle at the end of the heat

exchanger. The small tab on the baffle is folded over the end of the tube and clamped in place by
the vent connector and vent system, refer to Figure 14.

Note: Baffles are always placed at the end of the last heat exchanger tube length, with the

exception of the special configuration 205,000 BTUH with a 50' tube length, refer to
Figure 3 for more details.

Note: Baffles are either one or two sections (each section is 6' in length). Multiple sections are

simply clipped together. Where stainless and aluminized sections are supplied, always
place the stainless steel section closest to the burner. The easiest installation method is to
pull the baffle through the tube using a long wire.

Figure 14: Baffle Installation

Series LA/LX/LXR Page 19 Feb 11th 2015

Installation

Tube & Reflector

Hangers

Heat

Exchanger

Tube

Tube

Coupling

Vent

Adapter

Bend Tab

over End

of Tube

Install "J" Bolt
at first hanger

Tube

Flange

Gasket

2"
to
8"

Combustion

Tube

Burner

Assembly

Tube

Coupling

10' Flanged

Tube

8' - 9'

Locate Tube and
Reflector Hangers
every 10' thereafter.
*Note: (30' system shown
here, the same principle
should be followed for 40', 50'
systems or more)
Refer to Installation Sequence
for more details.

10' Tube

10' Tube

**Install Baffle(s)

as required in the

last section of tube

or as specified in this

manual

Note:
Close all chain links "S" hooks, "J" bolts

and turnbuckles or any open connection.

 A general overall view of the tubes and reflector hangers are shown inFigure 15 below

Figure 15: Overall view of Tubes and Reflector Hangers

Series LA/LX/LXR Page 20 Feb 11th 2015

Installation

Slide Reflector through
the Hanger and Reflector
Support as shown.

Note:
Close all chain links "S" hooks,
"J" bolts and turnbuckles or any
open connection.

1. Place Reflector Bracket
underneath the tube.

2. Hook the Spring Clip with
the Reflector Bracket and rotate
over the tube.

3. Push down the Spring Clip
and slide underneath the
Reflector Bracket.

Reflector Bracket

Spring Clip

Reflector Bracket

Tube

REFLECTOR INSTALLATION

 Slide a reflector section into place within the support hanger, (Figure 16).

 Install reflector support brackets, one at each reflector overlap position, and one in the middle of

each 10' reflector length.Figure 17 shows the installation of the reflector support bracket.

Series LA/LX/LXR Page 21 Feb 11th 2015

Figure 17: Reflector Support Bracket Installation

Figure 16: Reflector Installation

Reflector

Support

Loose

Screws

Tight

Screws

Loose

Screws

Tight

Screws

Reflector Overlap

Approx. 6"

Fasten Endcap

with Screws

Heater End

Vent

Termination

End

Installation

Note:Reflectors should overlap adjacent reflectors 4" to 6". Be sure not to tile reflector sections;
that is, reflector sections must be either above both adjacent reflector sections, or below both
adjacent reflector sections. Refer toFigure 18.

Series LA/LX/LXR Page 22 Feb 11th 2015

Figure 18: Reflector Overlap Illustration

Installation

Secure every SECOND reflector

overlap with a minimum of 2

#8 x 3/8" long screws

on each side

Secure reflector to reflector

bracket by TIGHTENING

#8 x 1 1/4" long screws every

other overlap on each side.

Note:
Close all chain links "S" hooks, "J" bolts
and turnbuckles or any open connection.

LOOSE screws

Insert End Cap into Reflector

and Secure it with #8 x 3/8" Screws

Note:
Close all chain links "S" hooks, "J" bolts
and turnbuckles or any open connection.

 Secure every second reflector overlap together with a minimum of 2 - #8 x 3/8" long screws (not

supplied), and secure reflector to the reflector bracket at this point by tightening down #8 x 1¼"
screws supplied with reflector brackets (Figure 19). The remaining reflector overlapjoints and
reflector brackets are left loose to accommodate system movement.

 Install End Cap as shown inFigure 4 and Figure 20.

Figure 19: Reflector Supports Installation and Reflector Overlap

Series LA/LX/LXR Page 23 Feb 11th 2015

Figure 20: Reflector End Cap Installation

Installation

Endcap

Elbow Detail

Couplings

Hanger
Location

U-Bend Detail

Couplings

Endcap Endcap

Hanger
Location

Endcap

Hanger
Location

ELBOW AND “U-TUBE” INSTALLATION

 If required by the heater layout, install 90° elbows or U-tube where indicated. Refer to Figure 21

for details.

Note: Elbows or U-tubesare typically installed without reflectors. To reduce the above
clearance to combustibles distance use miter reflectors (see Figure 22) and refer to
Clearance to Combustibles information.

 Elbows or U Tubes must be located not less than 10' from the burner in LA/LX/LXR-100 and

Figure 21: 90° Elbow and U-Tube Assembly Detail

smaller models, not less than 15' from the burner in LA/LX/LXR-125 to LA/LX/LXR-150, and not
less than 20' from the burner in LA/LX/LXR-175 and larger models.

Series LA/LX/LXR Page 24 Feb 11th 2015

Installation

Assemble Corner Bracket

to Mitered Reflectors as shown

Mitered Reflector

Sections should

overlap standard

Reflectors.

Fasten Mitered Reflectors

with 4 - #8 x 3/8" Screws

Note:

Close all chain links "S" hooks, "J" bolts
and turnbuckles or any open connection.

MITERED REFLECTOR INSTALLATION

 If used, install the Mitered Reflector as shown below (Figure 22).

Figure 22: Mitered Reflector Installation

Series LA/LX/LXR Page 25 Feb 11th 2015

SIDE REFLECTORS & BOTTOM SHIELDS

Reflector
Hanger

Side Reflector Bracket

(approx. 48" apart)

#8 x 3/8" Screw

#8 x 3/8" Screw

Reflector

#8 x 3/8" Screws

Notch the Side Reflector

for Reflector Brackets
and Hangers

Side Reflector

Reflector

Side Reflector

Side Reflector
Bracket

Screws to be installed from inside of Side Reflector.
Install screws on one end of the Retainer Clip to allow movement.

Use the hole as a guide to position Side Reflector.

The Side Reflector edge must be visible through
the hole at room temperature.

Side Reflector
Retainer Clip

Note:

Close all chain links "S" hooks, "J" bolts
and turnbuckles or any open connection.

 If used, install side shields (reflectors) and/or bottom shield as required. Refer to Figure

23andFigure 24for details.

 Side shields are 124" long. Fasten one side shield per reflector with #8 x 3/8" screws. Use three

side shield brackets per side shield. Space about 48" apart, refer to Figure 23.

Installation

Figure 23: Side Shield Overlap

Series LA/LX/LXR Page 26 Feb 11th 2015

Installation

Tighten Screw

Bottom Shield

#8 x 3/8" screws

Support Bracket

Tubing Section

Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

BOTTOM SHIELD REFLECTOR INSTALLATION

 Bottom shields need not overlap. Each 5' section is held with two support brackets (see Figure

24).

Figure 24: Bottom Shield Installation

Series LA/LX/LXR Page 27 Feb 11th 2015

Installation

Install from Outside of Shield and

hold with Screws from Outside

Notch

Deco-Grille Support

for Hangers

& Supports

Fasten to End Cap & Deco-Grille
Supports

Fasten with Screws

At Every 5ft Section

Reflector

Deco-Grille Panel

Deco-Grille Cross Strap

Deco-Grille End Angle

Deco-Grille Support

Install End Cap
as usual

Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

Reflector Shield

(Cut to fit Deco-Grille)

Notch Reflector Shield

as required for Hangers

and Reflector Supports

T-Bar Suspended

Ceiling

2" Min.

T-Bar
Shield

Install End Cap as per
"Installation of End Cap"
Figure

Deco-Grille
Panel

Reflector

Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

DECO-GRILLE (OPTIONAL)

Series LA/LX/LXR heaters are approved for the addition of Deco-Grille either directly to the heater
reflector or as part of a T-Bar installation where the heater is above the ceiling structure. Refer to Figure
25 and Figure 26 below for details.

Figure 25: Deco-Grille and Heater Installation

Figure 26: Deco Grille with Suspended Ceiling Installation

Series LA/LX/LXR Page 28 Feb 11th 2015

Venting / Combustion Air Ducting

IMPORTANT

- Maximum total vent length allowed for any model heater is 30'.

- Maximum total fresh air inlet duct length allowed for any model heater is

30'.

- Total of vent length plus outside air supply duct length cannot exceed 50' for

any heater with minimum heat exchanger length.

- If condensation in the vent pipe or outside air supply duct is a problem,

shorten or adequately insulate the section.

- Install a minimum 18 inch (30 cm) straight length of duct for air intake or

vent before any Tee or elbow.

- Do not install any elbow or 45 fitting to bring vent lower than the horizontal
tube system.

Note: The above stated requirements assume a maximum of 2 elbows in the
total combination of vent and air supply duct. Subtract 5' of allowable length for

each elbow if 3 or more elbows are used.

General Requirements

 Refer to the National Fuel Gas Code, ANSI Z223.1 (NFPA 54) in the US and CAN/CGA B149.1

and B149.2 Installation Codes in Canada, as well as all local requirements for general venting
guidance.

 Series LA/LX/LXR Infrared Heaters may be installed vented or unvented.
 Series LA/LX/LXR Infrared Heaters may be vented horizontally or vertically using conventional

venting materials.

 If heater is to be vented horizontally, the vent from building must:

o Be not less than seven feet above grade when located adjacent to public walkways.
o Terminate at least three feet above any forced air inlet located within ten feet.
o Terminate at least four feet below, four feet horizontally from or one foot above any door,

window, or gravity inlet into any building.

o Be located at least 12" inches from any opening through which vent gases could enter a

building.

o Extend beyond any combustible overhang.
o Be installed at a height sufficient to prevent blockage by snow.

 Optional outside air supply may be directed to the heater horizontally or vertically.

Un-Vented Operation

 Requirements for combustion air supply and dilution air vary by jurisdiction, building type and

specific installation details. See local codes for guidance.In general, fresh air ventilation must be
provided to the building space at(3 cfm per 1000 BTU/Hr in Canada). In The USA verify
applicable codes.

 Optional outside air supply is not recommended for unvented heaters due to possible pressure

imbalances in the building space.

 Ensure that minimum combustible clearances are maintained for unvented heaters. Refer to Table

2, for required clearance dimensions.

Series LA/LX/LXR Page 29 Feb 11th 2015

Venting / Combustion Air Ducting

NON-COMBUSTIBLE

WALL

MAX. 30'

WITH 2 ELBOWS

4" VENT
TERMINAL
P/N CT011

NOTES:

- 4" WALL THIMBLE AND 4" VENT TERMINAL MUST BE USED
WITH SINGLE WALL VENTING THROUGH A COMBUSTIBLE WALL.

4" WALL THIMBLE

P/N CS006

COMBUSTIBLE WALL

MAX. 30'

WITH 2 ELBOWS

4" VENT TERMINAL

P/N CT011

14" MIN.

14" MIN.

24 GSG VENT

MATERIAL.

Vented Operation

In all cases, be sure vent pipes and outside air supply ducts are sealed with approved sealant, such as high
temperature RTV silicone. Double wall venting (B vent) may not require sealant.

Horizontal Venting

 When venting through combustible walls, use approved vent terminal Tjernlund VH1-4, or SRP

supplied deflector vent terminal with an approved insulating thimble.

 When venting through non-combustible walls, use SRP supplied deflector vent terminal.

Recommended extension of the terminal past the outside wall surface is 18" minimum.

Vertical Venting

 Minimum vent pipe size is 4" for an individual heater. Additional vent pipe sizes as required to

accommodate multiple heaters venting through a common roof vent are defined in the appropriate
gas installation code. (Refer to common venting section below).

 Use of an approved thimble to pass through combustible roof materials is required.
 Use of an approved vent cap is required.
 Check local codes for vertical vent size for fan-assisted appliances.

Common Vertical Venting

 Common vent sizing information is defined in the appropriate gas installation code (Refer to

ANSI Z223.1 and CAN/CGA B149.1 and B149.2 for sizes and installation information).

 For vertical venting refer to ANSI Z223.1 and CAN/CGA B149.1 and B149.2 Fan Assisted

Category 1 Appliances.

 Connection locations to the common vent should be offset to avoid pressure interferencesbetween

heaters, refer to ANSI Z223.1 and CAN/CGA B149.1 and B149.2Fan Assisted Category 1
Appliances.

Series LA/LX/LXR Page 30 Feb 11th 2015

Figure 27: Horizontal Venting

Venting / Combustion Air Ducting

FOR VERTICAL VENTING REFER TO

ANSI Z223.1 AND CAN/CGA B149.1

AND B149.2 FOR FAN ASSISTED

APPLIANCES.

ROOF

FOR VERTICAL VENTING REFER TO

ANSI Z223.1 AND CAN/CGA B149.1

AND B149.2 FOR FAN ASSISTED

APPLIANCES.

INCREASE TO DETERMINED

VENT SIZE

FOR VERTICAL VENTING REFER TO

ANSI Z223.1 AND CAN/CGA B149.1

AND B149.2 FOR FAN ASSISTED

APPLIANCES.

ROOF

SINGLE HEATER MULTIPLE HEATERS

TYPE B-VENT

TYPE B-VENT

6" VENT
TERMINAL
P/N CT044

NOTES: (FOR HORIZONTAL VENTING)

1- USE 4" SINGLE WALL VENT WITH HEATERS OF COMBINED INPUT OF UP TO 250,000 BTUH

AND 6" FOR A COMBINED TOTAL INPUT OF 250,000 BTUH OR GREATER.

2 - WALL THIMBLES AND VENT TERMINALS

MUST TO BE USED WITH SINGLE WALL HORIZONTAL VENTING THROUGH COMBUSTIBLE WALLS.
WALL THIMBLE MAY BE REPLACED BY FLASHING WHERE THE VENT IS PENETRATING
A NON-COMBUSTIBLE WALL.

6"

TOTAL VENT LENGTH FOR

SINGLE WALL VENTING

(INCLUDING ELBOWS) = 40'

EACH ELBOW = 5'

MAX. NUMBER OF ELBOW = 3

WALL

5' MAX

18" MIN.

COMMON VENTING FOR HEATERS

WITH A COMBINED TOTAL INPUT OF 250,000 BTUH OR GREATER

4"

TOTAL VENT LENGTH FOR

SINGLE WALL VENTING

(INCLUDING ELBOWS) = 40'

EACH ELBOW = 5'

MAX. NUMBER OF ELBOW = 3

WALL

5' MAX

4" VENT
TERMINAL
P/N CT011

18" MIN.

COMMON VENTING FOR HEATERS

WITH A COMBINED TOTAL INPUT OF UP TO 250,000 BTUH

FOR COMBUSTIBLE
WALLS
4" WALL THIMBLE
P/N CS006
6" WALL THIMBLE
P/N CS033

24 GSG VENT
MATERIAL.

24 GSG VENT

MATERIAL.

Figure 28: Vertical / Common Venting

Common Horizontal Venting

 All heaters connected to a common horizontal vent must operate at the same time. Connect the

electrical circuit to the same thermostat to ensure simultaneous operation.

 Fresh air supply CANNOT supply other burner systems.
 Refer to Figure 29 for detailed Common Horizontal Venting guidelines.

Series LA/LX/LXR Page 31 Feb 11th 2015

Figure 29: Common Horizontal Venting

Venting / Combustion Air Ducting

Air Flow

Direction

Flex Duct

To Outside Air:
Directly to Outside
or to Common
Ductwork

from Blower

12"

Max.

for all Flex

Duct

Note:
Do not use flex duct

to form an elbow!

Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

Combustion Air Supply (Optional)

 An outside combustion air supply is strongly recommended if the building space encloses a

negative pressure due to exhaust etc. or if the building contains materials which would expose the
heater to halogenated hydrocarbon atmospheres.

 The outside air terminal must be of an approved type, and should be located at an elevation equal

to or below the vent terminal elevation to prevent back-venting of flue gases into the burner
compartment.

 Install single wall pipe or PVC pipe and fittings with a 12-inch linearsection of flexible duct to

allow movement of the heater. Do not use flexible duct throughout the entire length of fresh air
duct. This may cause nuisance air switch tripping.

Figure 30: Installation of Outside Air as supply for Combustion

Series LA/LX/LXR Page 32 Feb 11th 2015

Outdoor Installation

Outdoor Installation

Vent Terminal

P/N CT011

Seal Joints

Fresh Air

Inlet Hood

P/N CS005

Seal Joints

OUTDOOR INSTALLATION (LXR MODELS ONLY)

When a heater is to be mounted outdoors it must be installed in such a way that wind will have minimum
effect on its movement. This consideration is intended to eliminate undue stress on the gas flex connector.
In all cases a fresh air hood must be used in conjunction with a vent terminal of the approved type, and all
connections must be sealed with a high temperature sealant that can withstand 400°F.

Figure 31: Outdoor Installation

Note: that this heater is a sealed construction. If any services or repair is conducted in the future,
gasket materials should be inspected and replaced if found to be deteriorated.

Series LA/LX/LXR Page 33 Feb 11th 2015

Gas Piping

CORRECT POSITIONS INCORRECT POSITIONS

WRONG

WRONG WRONG

WRONG

Heater Movement

Heater

Movement

Heater Movement

Heater

Movement

Shut-Off Valve

Flexible Gas Connector

Heater Movement

Air Flow Direction

12"

0 - 180°

3" (7.62 cm) Max.

Displacement

General Requirements

 The gas meter and service must be sufficiently large to supply gas to the connected building gas load

including the heating equipment and any other gas fired equipment. Additionally, the gas
distribution piping must be designed according to local and national ordinances. Generally (low
pressure) systems designed with a maximum ½"W.C. total pressure drop meet this requirement.

 Gas supply pipe sizing must be in accordance with the National Fuel Gas Code, ANSI Z223.1

(NFPA 54) in the US and CAN/CGA B149.1 and B149.2 Installation Codes in Canada.

 Before connecting burners to the gas supply system, verify that high pressure testing of the system

has been completed. Failure to do so may expose the burner components to damaging high
pressure, requiring replacement of key components.

Flexible gas connectors of approved type must be installed as shown in Figure 32, in one plane, and
without sharp bends, kinks or twists. A smooth loop of approximately 12" in diameter is best. Failure to
install the gas connection in the approved manner will result in a hazardous and potentially deadly
situation due to the movement of the heat exchanger and burner in the normal course of operation.

Series LA/LX/LXR Page 34 Feb 11th 2015

Figure 32: Flexible Gas Connections

Electrical Wiring

24V STAT

HV

24V
V2

S1

GND

L1

IND

TH

V1

PSW

IGNITER

BURNER

SENSOR

24V

BLOWER

Green

Pink

Orange

Black

Blue

Yellow

Black

Yellow

Red

SWITCH

AIR

Purple

LAMP

RUN

Purple

Brown

L1

TRANSFORMER

NEUTRAL

120V

Blue

Red

Purple

BrownYellow

GAS VALVE

THERMOSTAT IS

MOUNTED EXTERNALLY

WIRING DIAGRAM All Models Series L

Blue & Purple Wires are
Factory Jumpered,
Disconnect to

Wire in Thermostat

When connecting 120 VAC stat
the two blue wires used for the 24 Vac
stat must be connected internally.

MOUNTED EXTERNALLY

HV

GND
S1

V2

24V

V1

IND
L1

Black

Black

TH
PSW

BURNER

Yellow

Green

Pink

Blue

IGNITER

SENSOR

Blue

L1

NEUTRAL

TRANSFORMER

SWITCH

BLOWER

Black

Red

AIR

24V

Purple

Purple

Red

Blue

GAS VALVE

Yellow Brown

120V

120 Vac STAT

THERMOSTAT IS

120 Vac Thermostat

NOTE: The post purge feature is not

utilized with the thermostat wired on the
120 Vac circuit. This option only works
if the heater is wired with the thermostat
on the 24 Vac circuit above.

Yellow

LAMP

RUN

Brown

24 Vac Thermostat

General Requirements

Heaters are normally controlled by line voltage (120V) or low voltage (24V) thermostats. Line voltage
thermostats are wired directly while low voltage thermostats use a relay. In all cases, heaters must be
grounded in accordance with the National Electric Code, ANSI/NFPA 70 in the US, and the Canadian
Electric Code, CSA C22.1 in Canada, and must comply with all local requirements. Heaters may also be
controlled with a manual line switch or timer switch in place of the thermostat. Refer to Figure 33for
guidance on electrical wiring of heaters.

If any of the original wire as supplied with the heater must be replaced, it must be replaced with wiring
having a rating of at least 105°C temperature service and 600 volts capability.

Series LA/LX/LXR Page 35 Feb 11th 2015

Figure 33: Wiring Diagram

LXR Wiring Only

Black

BURNER

Pink

IGNITER

SENSOR

SWITCH

BLOWER

Orange

Red

AIR

GAS VALVE

YellowBrown

NOTE: The post purge feature is not
utilized with the thermostat wired on the
120 Vac circuit. This option only works
if the heater is wired with the thermostat
on the 24 Vac circuit above.

Yellow

LAMP

RUN

Brown

24V

FS

120L

IND

Yellow
Brown

24V STAT

Blue

Purple

THERMOSTAT IS

MOUNTED EXTERNALLY

Blue & Purple Wires are
Factory Jumpered,
Disconnect to
Wire in Thermostat

Purple

Blue

L1

N

120V

L1

N

120V

24V

Red

Black

Yellow

Green

Channel Module 53X-24

The following wiring diagram is for LXR models only

Electrical Wiring

Series LA/LX/LXR Page 36 Feb 11th 2015

Figure 34: LXR Wiring Diagram

Burner Operation

Starting Sequence of Operation

 Turn the thermostat up. When the thermostat calls for heat, the blower motor will energize.
 When the motor approaches nominal running RPM, the air-proving switch closes and activates the

ignition module.

 The ignition module, after a pre-purge period of approximately 30 seconds, energizes the igniter.

Additionally, the gas valve is energized for this ignition trial period of 15 seconds.

 If a flame is detected, the ignition sensing rod "reads" a rectification signal and the gas valve

remains open. The sparking stops when the flame signal is established.

 If no flame is detected, the gas valve closes and a 30 sec inter-purge period begins. After the inter-

purge, the module repeats the trial for ignition period. If flame is still not established, a third and
final inter-purge followed by a final ignition trial cycle begins. After three trials, the module will
lockout for a period of approximately 1 hour or until reset. (Reset is accomplished by removing
power from the module for at least 5 seconds.) After this 1-hour period, the module re-attempts the
full ignition sequence.

 When using a 24V thermostat and the heat requirement has been met and the thermostat opens, the

burner shuts off but the fan continues to run for approximately 30 seconds. This is referred to as a
post purge. This allows the products of combustion to be removed from the heat exchanger to avoid
nuisance condensation and increase heat exchanger life.

 When using a line voltage thermostat and the heat requirement has been met and the thermostat

opens, the burner and fan shut off with no post purge.

Maintenance

For best performance, the certain minimal maintenance procedures should be performed before each
heating season:

 Before performing any services or maintenance, shut off gas and electrical supply to heater.
 Check condition of forced air blower scroll and motor. Dirt and dust may be blown or vacuumed

from the blower.

 Check condition of burner. Remove any foreign objects or debris from inside the burner box or

burner cup.

 Inspect the igniter. Replace igniter if there is excessive wear or erosion, breakage or other defects.
 Be sure the burner observation window is clean and free of cracks or holes. Clean or replace as

necessary.

 Check the flue pipe for soot or dirt and reattach to the heater after cleaning as necessary.
 The reflector sections may be cleaned by wiping with a damp cloth.
 A service agency qualified to adjust and repair infrared heaters should be engaged for service other

than routine maintenance.

 Be sure vent terminal and fresh air inlet are free from obstructions. If either pipe is restricted, the

safety air switch will not operate properly, and the heater could fail to operate.

 Check the inside of the heat exchanger tube visually with a flashlight. If carbon or scale are present,

scrape or otherwise remove deposits (a wire brush works well)

Series LA/LX/LXR Page 37 Feb 11th 2015

Troubleshooting

Blower Motor Fails to Run

 Is the thermostat calling for heat? Is there 115V at the burner receptacle?
 Check blower side door for seal. Repair as necessary.
 Check blower for obstructions. Replace blower if necessary.

No Gas Supply

 Check to see if manual supply valve to heater is ON.
 Check to see if gas valve knob on heater gas control is ON.
 Supply gas pressure can be checked at 1/8" NPT pressure tap in gas supply system.
 Is combination gas control opening? No manifold pressure indicates valve is closed. Gas pressure

downstream of gas control can be measured by connecting a manometer to pressure tap on control.
If the valve is closed, either the gas valve or the ignition module is faulty.

Burner Does Not Light

 Is spark visible through site glass during ignition trial? If no, further electrical checks by a

qualified service person are required.

 Check to see if gas lines were properly purged of air.
 Check inlet and outlet gas pressure during ignition period.
 Check for proper orifice and air plate.

Burner Does Not Stay Lit

 Check ground wire continuity.
 Check insulation on the igniter leads.
 Measure flame signal current; it should be between 2 to 6 micro amps dc. Minimum 0.8 micro

amps.

 Clean flame rod if necessary.
 Replace module if necessary.

Series LA/LX/LXR Page 38 Feb 11th 2015

Troubleshooting Chart

YES

YES

YES

YES YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

Check Air Lines To

Switch

Check Burner System

For Obstruction

Replace Valve

Check For 24V At

Switch

Rectify Transformer Or

Wiring As Required

Rectify As Required

Rectify As Required

Rectify As Required

Is Valve In On

Position?

Replace Ignition

Control Module

Is Pressure Switch

Operating?

Unplug Motor

Does Motor/Impeller

Spin Freely?

IF PROBLEM PERSISTS CONTACT YOUR LOCAL SRP REPRESENTATIVE

Verify Sense Electrode

Verify Ground

Verify Wiring

Does 24V Occur At

Valve During

Ignition Trial? Check

Wiring and Rectify

As required

Check Electrode Gap

Set to 1/8"

Replace Motor If

Required

Check 120V Power

Verify at Motor

Is There A Flame

Signal To Module?

Min. 0.8 Micro Amps

Is Gas Present At

Valve? Is Gas

Pressure Sufficient?

Check Ignition Wire

Replace If Damaged

Check Thermostat

Replace If Required

Burner

Stays

Lit?

Burner

Lights?

Does

Electrode

Spark?

Blower

Starts?

Turn Up

Thermostat

TROUBLESHOOTING CHART

YES

Replace Module if

no power to Motor

Troubleshooting Chart

Series LA/LX/LXR Page 39 Feb 11th 2015

Replacement Parts

ITEM #

1

2

PART #

INDICATOR LIGHT

TRANSFORMER

DESCRIPTION

IGNITION MODULECE015

CE057

CE058

3

11

13

5

2

7

4

12

1

8

10

6

3

9

4

GAS VALVE REPLACEMENT KIT - NAT.

GAS VALVE REPLACEMENT KIT - LPG.

CG142

CG143

5

BLOWER MOTOR - 40,000 TO 175,000 BTU

BLOWER MOTOR - 205,000 TO 220,000 BTU

CE004

CE013

BLOWER GASKETCH007

6

FLAME SENSOR ELECTRODE

LE002

7

ITEM # PART # DESCRIPTION

12

10

BURNER CUP
BURNER CUP ASSEMBLY (C/W ELECTRODES)

LG004

LG005

SIGHT GLASS ASSEMBLYCH01111

AIR SWITCH - MODELS - LA/LX - 40

CE025

CE025

CE025

CE142

AIR SWITCH - MODELS - LA/LX - 60

AIR SWITCH - MODELS - LA/LX - 80

AIR SWITCH - MODELS - LA/LX - 100

13

IGNITION WIRECE006

9

BURNER GASKETCH001

14

AIR INLET KITVS022

14

Note:
LXR Models use the

same parts as LX Models

8 SPARK ELECTRODELE001

Series LA/LX/LXR Page 40 Feb 11th 2015

Warranty

Series

Component

Warranty Period

3

Years

5

Years

7

Years

10

Years

U,
T,
L,
LT,

Burner & Controls

*

Hot Rolled Heat Exchanger w/o Post Purge

* Aluminized Heat Exchanger w/o Post Purge

* Hot Rolled Heat Exchanger with Post Purge

* Aluminized Heat Exchanger with Post Purge

*

SERIES LA, LX, and LXR INFRARED HEATERS

WARRANTY

The manufacturer warrants to the original owner that the product will be free of defects in material
and workmanship as described below.

The Manufacturer’s obligation under this warranty is limited to repair or replacement, F.O.B. its

facility, of the defective part. In the case of replacement parts, the warranty period shall be the longer
of the original warranty or a period of 12 months from the date of purchase. In no event shall the
Manufacturer be liable for incidental expense or consequential damages of any kind.

This warranty does not cover any shipping, installation or other costs incurred in the repair or
replacement of the product. No materials will be accepted for return without authorization.

This warranty will not apply if in the judgment of the Manufacturer, the equipment has been
improperly installed, unreasonably used, damaged or modified.

This warranty will not apply to damage to the product when used in corrosive atmospheres and in
particular atmospheres containing halogenated hydrocarbons. No person is authorized to assume for
the Manufacturer any other warranty, obligation or liability.

THE REMEDIES PROVIDED FOR IN THE ABOVE EXPRESS WARRANTIES ARE THE SOLE
AND EXCLUSIVE REMEDIES. NO OTHER EXPRESS OR IMPLIED WARRANTIES ARE
MADE INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR PURPOSE.

Series LA/LX/LXR Page 41 Feb 11th 2015