Superior Series GR Training manual

02/14 LT094
Note: Not For Installation in Mobile Homes or Recreational Vehicle.
Series GR Infrared Heater
Installation, Operation and Service Instructions
Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Don’t touch any electrical switch; do not use any telephone in your building.
Immediately call your gas supplier from a neighbor’s phone. Follow the gas
supplier’s instructions.
If you cannot reach your gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
563 Barton Street, Stoney Creek, Ontario, L8E 5S1
www.superiorradiant.com
WARNING: If the information in these instructions are not followed
exactly, a fire or explosion may result causing property damage,
personal injury or loss of life.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for the future reference.

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" inch in 10' feet to allow start-up
condensate drainage.

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
Electrical...............................................................................................................................................................................5
Venting.................................................................................................................................................................................5
HighAltitude.........................................................................................................................................................................5
SafetyFeatures.....................................................................................................................................................................5
GeneralSpecifications...........................................................................................................................6
GasSupply.....................................................................................................................................................6
InletPressure........................................................................................................................................................................6
ManifoldPressure.................................................................................................................................................................6
InletConnection...................................................................................................................................................................6
ElectricSupply................................................................................................................................................6
HeaterSpecifications.....................................................................................................................................6
ClearancetoCombustibles....................................................................................................................7
ClearancetoCombustibleMaterials...............................................................................................................7
InstallationDetail..................................................................................................................................9
InstallationSequence.....................................................................................................................................9
OutdoorInstallation......................................................................................................................................10
Venting/CombustionAirDucting.......................................................................................................14
GeneralRequirements..................................................................................................................................14
OptionalHorizontalElbowVentTerminal.....................................................................................................16
RoofVenting.................................................................................................................................................17
GasPiping...........................................................................................................................................18
GeneralRequirements..................................................................................................................................18
ElectricalWiring..................................................................................................................................19
GeneralRequirements..................................................................................................................................19
Operation/Maintenance....................................................................................................................20
StartingSequenceofOperation....................................................................................................................20
Maintenance.................................................................................................................................................20
TroubleShooting.................................................................................................................................21
TroubleshootingChart..................................................................................................................................22
ReplacementParts..............................................................................................................................23
Warranty.............................................................................................................................................24

Series GR Page 4 February 10, 2014
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.
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 GR Page 5 February 10, 2014
Introduction
The appliance must be isolated from the gas piping system by closing equipment shutoff valve during
any pressure testing of the gas supply piping system at test pressures equal to or less than ½ psi (305
Kpa)
Electrical
All heaters must be electrically grounded in accordance with the National Electric Code, ANSI/NFPA
70 in the USA 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 USA 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 for conventional venting methods. See page 11 for horizontal
venting requirements.
This appliance shall not be connected to a chimney flue serving a separate solid-fuel burning
appliance.
High Altitude
When installing this appliance over 4500 ft. above sea level in Canada, the appliance must be properly
de-rated and installed according to local codes. In the absence of local codes the appliance must be de-
rated in accordance with the most recent CAN/CGA-B149 code.
In the United States for installations over 2000ft above sea level the appliance must be installed in
accordance with the Current National Fuel Gas Code, ANSI Z223.1/NFPA 54.
Safety Features
This heater utilizes an airflow switch as blocked vent shut off system. This system is designed to
prevent the operation of the appliance if a fresh air supply is blocked or if the flue exhaust is blocked.
If this system fails to operate DO NOT ATTEMPT ADJUSTMENTS. Disconnect power to the
appliance and contact a qualified service person.

Series GR Page 6 February 10, 2014
General Specifications
Gas Supply
Electric Supply
120 VAC, 60 Hz., 1 Amp: Heater includes a 36" power cord with grounded 3 prong plug.
Heater Specifications
Input: Model GR-30: 30,000 BTUh Model GR-45: 45,000 BTUh
Weight: Model GR-30: 100 lbs (45 Kg) Model GR-45: 100 lbs (45 Kg)
Venting: Horizontal venting, Max. air vent / flue for either rate is 10' feet
Roof Venting, Refer to ANSI Z223.1 and CAN/CSA B149.1 and B149.2 fan
assisted appliances for correct sizing.
Flue Dia.: 2" diameter (installed concentrically)
Note: The heater includes a horizontal vent installation kit. The kit contains all components
necessary to vent the heater horizontally and is required. See page 11.
A vertical vent kit is available as an alternate venting method. This Kit Part # RS022 is
available through SRP distributors and contains the appropriate adapters to allow the
connection of B-vent material. See roof-venting page 13.
Figure 1: Overall Dimensional Information
Inlet Pressure
Natural Gas: Min. 5.0" W.C. Propane Gas: Min. 11.5" W.C.
Max. 14.0" W.C. Max. 14.0" W.C.
Manifold Pressure
Natural Gas: 3.5" W.C. Propane Gas: 10.5" W.C.
Inlet Connection
Natural Gas or Propane Gas: 1/2" NPT. Female
6.4
5.4
113.0 1.0
1.8
3.8
7.5
15.1

Series GR Page 7 February 10, 2014
Clearance to Combustibles
Clearance to Combustible Materials.
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 1 lists the minimum clearance to combustible materials for various installation configurations.
Additional clearance may be required for glass, painted surfaces and other materials which may be
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.
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.
It is important to observe minimum clearance to combustibles at all times to avoid any possibility of
property damage or personal injury. Clearances must be maintained from vehicles parked beneath heaters.
Signs should be posted identifying any possible violation of the clearance distances from the heater in
vehicle areas. Also maximum allowable stacking height in storage areas should be identified with signs or
appropriate markings. Figure 2 shows minimum clearance to combustible materials.

Series GR Page 8 February 10, 2014
Clearance to Combustibles
Configuration Dimension 30,000 BTUh 45,000 BTUh
Standard
A
B
C
D
2˝
18˝
36˝
18˝
2˝
18˝
50˝
18˝
45° Tilt
A
B
C
D
2˝
2˝
33˝
33˝
3˝
3˝
48˝
48˝
Vented End 5” 5”
Table 1: Clearance to Combustible Table
Figure 2: Clearance to Combustible Diagram
CAUTION
In all cases, the minimum hanging height from the floor shall be:
In Canada: 7' feet In USA: 8' feet
C
B
A
45°
C
B
D
D
A

Series GR Page 9 February 10, 2014
Installation Detail
Installation Sequence
The heater is sent with all parts necessary for installation with the exception of chain.
It is recommended that the heater be hung as high as possible and along an uncluttered wall to give the
reflector a widest possible “view” of the space to be heated. Avoid installation directly over vehicle
parking, over cabinets, or where an open door will interfere. Adhere to minimum clearances on the rating
plate.
Leave adequate space around the burner box for future servicing.
Choose a location that permits easy installation of exterior venting. A horizontal vent length up to 10' feet
is allowed. For vertical venting adhere to local venting tables and methods.
Figure 3: General Overview of Components Utilized in the Installation
As required, fasten hanging angles to ceiling such that heater-hanging points can be accommodated.
Each hanging point must be able to hold at least 150 lbs.
Allow for movement of heater during expansion and contraction during operating cycle.
Heater must fire horizontally. To tilt reflector at 45°, lengthen two of the hanging points to an appropriate
length using chain. (Each chain length will be approximately 12" inches longer than the high side of the
heater). 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.
96.00"
Fasten Support Angle to Ceiling to
Accommodate Heater Hanging Points
OR
Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

Series GR Page 10 February 10, 2014
Installation Detail
Outdoor Installation
For outdoor installations the heater must be installed not more than 8" from beneath awnings, and not
less than 24" from back and side as shown in Figure 4. If the heater cannot be protected from the
elements by an overhang, then a protective cover must be installed as shown in Figure 7, Figure 8 and
Figure 9.
Figure 4: Outdoors Heater Installation
When the heater is installed with back and side dimensions greater than the minimum of 24" then
the top dimension may be increased. The new maximum Top dimension is 1/3 of the smallest side or
back clearance.
Example:
Given: Side dimension = 36"
Back dimension = 48"
A ratio of 3:1 must be maintained
The side dimension gives us a maximum Top dimension of (36/3)" = 12"
The back dimension gives us a maximum Top dimension of (48/3)" = 16"
The new Top dimension is 12", the lesser of the two.
24"
24"
SIDE
BACK
TOP 8"
Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

Series GR Page 11 February 10, 2014
Installation Detail
Figure 5: Mounting Distances for Outdoor Installations under Eaves.
Figure 6: Mounting Distances for Tilted (45°) Outdoor Installations under Eaves.
In the case where the heater is installed at a 45° angle, the minimum dimension inside the overhang is 28"
from both the back and side of the burner box and 8" maximum on the top. If the side or back dimensions
are increased then the top clearance may be increased using the same rules as for a horizontal installation.
NOTE: These dimensions are only for satisfying outdoor heater positioning. Clearance
to combustible must also be satisfied.
24.00" Min. or ("B") 8.39" or ("B/3") Max.
28.00" Min. or ("B") 8.00" Max. or ("B/3") 28.00" Min. or ("B") 8.00" Max. or ("B/3")

Series GR Page 12 February 10, 2014
Installation Detail
When a heater is installed outdoors without the presence of an adequate eave, then a protective cover must
be installed as illustrated below. This cover is available from your local dealer (Part # RS020).
Cover Installation Sequence
Install support brackets on to heater covers as shown in step 1 in Figure 7.
Pre-assemble the cover and its top covers and bottom cover as shown in step 2 in Figure 7.
Remove the two top screws holding the reflector in place.
Slide cover onto burner making sure the support brackets slide into slots on the bottom cover.
Secure cover to heater by screwing in the cover bracket in step 3B in Figure 8.
Install the extension covers (Front, Back, and Side) as shown in step 4 in Figure 8 if needed.
Figure 7: Cover Installation Sequence Steps 1 and 2
When a heater is to be installed outdoors at 45° without the presence of an adequate eave, an extension
cover must be used to protect the heater, refer to step 4 in Figure 8. This extension cover is available
through your local SRP Dealer (Part # RS021). Note that both the cover and extension cover must be used
in this case.
Figure 8: Cover Installation Sequence Steps 3 to 5
Cover
2
Right Support
Bracket, Install
Screw on
Bottom Hole
Left Support
Bracket, Install
Screw on
Top Hole
1Install Both
Top Covers
As Shown,
Then Install
Assembly on
to Heater
Install Bottom
Cover As Shown
Back
Side
Front
5
4
3
Install 45°
Extension
Covers
As Shown
Attach Cover
Bracket
3
A
B
Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

Series GR Page 13 February 10, 2014
Installation Detail
Figure 9: Extension Cover for 45° Outdoor Installations
Extension Cover
Note:
Close all open ended "S" hooks, chain links,
and turnbuckles or any open connection.

Series GR Page 14 February 10, 2014
Venting / Combustion Air Ducting
General Requirements
Refer to the National Fuel Gas Code, ANSI Z223.1 (NFPA 54) in the USA and CAN/CGA B149.1
and B149.2 Installation Codes in Canada, as well as all local requirements for vertical venting and
general guidance for minimum distances to openings to the building.
This equipment is of balanced flue construction and must be horizontally vented (see Figure 10).
Vertical venting is permitted, but not as a balanced flue assembly. (See roof venting)
Figure 10: Various Venting Orientations
A flue/air vent length of 8 feet or less is recommended, although a maximum of 10' feet is
allowable (including one elbow).
An approved Wall Terminal that allows the air duct to pass through the wall is required. This is
included with your heater. The Wall Terminal is a zero clearance terminal for both combustible
and non-combustible walls.
For horizontal venting where an elbow is utilized an elbow kit (Part No. RT013) must be used,
refer to Figure 10 for more details.
The 2" inch flue pipe should extend a minimum of 6" inches beyond the end of the 4" inch wall terminal
(for horizontally vented heaters only see Figure 12). Where the vent is under an eave the 2" vent pipe
must have a minimum clearance of 7" from the centerline of the vent to the bottom of the eave, refer to
Figure 11. However, when the 2" pipe is less than 18" from the bottom of the eave, we
recommend the 2" inch flue extend just beyond the eave to prevent the possibility of frost. (Adhere
to any code requirements for clearances to opening in the building).
An optional “Horizontal Elbow Vent Terminal” kit for horizontal venting is also available, refer to
Figure 12 and Figure 13
Wall Thickness
(Max. 10")
(Min. 1")
NOTES:
1- This Heater may be rotated at 45° Tilt, but both ends of the heater must be kept at the same elevation.
2- Total Vent Length (Including One (1) Elbow) = 10'
Each Additional Elbow = 4'
Max. Number Of Elbows = 2
Wall Terminal
P/N RS006
Wall Thickness
(Max. 10")
(Min. 1")
Ø4" Combustion
Air Inlet Duct Ø2" Flue
Pipe Wall Terminal
P/N RS006 Wall Terminal P/N RS006
Wall Thickness
(Max. 10")
(Min. 1")
Ø4" Combustion
Air Inlet Duct
Ø2" Flue Pipe
Ø4" Combustion
Air Inlet Duct
Ø2" Flue Pipe
Heater may be sloped 1
4" in 10 '
Vent Elbow Kit
P/N RT013
Vent Elbow Kit
P/N RT013
6 6 6

Series GR Page 15 February 10, 2014
Venting / Combustion Air Ducting
Figure 11: Minimum Clearance under an Eave
The 2"-inch flue vent is inside (concentric with) the 4" inch combustion air inlet duct. Each of the
former must be seamless and all joints must be fastened with screws and sealed with GE RTV-106
high temperature sealant (or equivalent) refer to Figure 12. The exposed 4" combustion air intake pipe
is zero clearance throughout its length.
Figure 12: Venting / Combustion Air Ducting
7"
7"
Fasten Screws (Min. one "1" Screw for 2" Flue Pipe)
2" Flue Pipe
(Flue Vent)
4" Combustion Air Inlet Duct
Maximum 10 Feet of Venting
With One (1) Elbow
2" Flue Pipe Should be
Concentric with the 4"
Combustion Air Inlet Duct
Seal Joints With RTV Silicone
Fasten Screws
(Min. 2 Screws
for 4" Duct)
Seal Joints
With RTV Silicone
6.0"
Extension
Wall Terminal
OR
10.0"
Extension
Wall Terminal
Optional Horizontal
"Elbow Vent Terminal"

Series GR Page 16 February 10, 2014
Venting / Combustion Air Ducting
Optional Horizontal Elbow Vent Terminal
The GR Models are approved to be used with an Elbow as a Horizontal Vent Terminal see Figure 13 for
installation details..
Figure 13: Optional Horizontal Elbow Vent Terminal / Installation.
Ø2" Flue Pipe
Wall Terminal
P/N RS006
"Optional" Horizontal
Elbow Vent Terminal
10
Seal Joint with
RTV Silicone
Secure Vent Elbow
using sheet metal
screws

Series GR Page 17 February 10, 2014
Venting / Combustion Air Ducting
Roof Venting
When heater is to be vented through a roof (Vertical Venting), a B-Vent adapter kit (Part # RS022) must
be used. The B-vent must be installed in accordance to the National Fuel Gas Code, ANSI Z223.1 (NFPA
54) in the USA and CAN/CGA B149.1 and B149.2 Installation Codes in Canada. Refer to the former for
correct sizing. Refer to Figure 14 for general overview.
Combustion air may be supplied from the outdoors using the material provided in the vent adapter kit
(Part # RS022) available from your local dealer. Maximum length of fresh air is 10 feet including one
elbow. Fresh air ducting is not provided in the kit.
Figure 14: Roof Venting / Combustion Air Ducting
The B-vent adapter must be secured with screws and sealed with high temperature silicone sealant. Install
B-vent as per local code requirements.
Vertical Vent Kit
P/N RS022
For Vertical Venting Refer To
ANSI Z223.1 and CAN/CSA B149.1
and B149.2 for Fan Assisted Appliances
for Correct Sizing, Clearance and
Penetration Requirements.
B-Vent
Adapter
4" Combustion
Air Inlet Duct
4" Fresh Air Terminal
(included in vertical vent kit)
B-Vent
Flue Pipe
(Flue Vent)

Series GR Page 18 February 10, 2014
Gas Piping
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 1/2"-inch 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 USA 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 15, in one plane,
and without sharp bends, kinks or twists. A smooth loop of approximately 12" inches 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.
Figure 15: Flexible Gas Connection
3" (7.62 cm) Max.
Displacement
12"
(30 cm)
Heater Movement Vertical
(As Shown Below)
Alternate
Positions
Okay
CORRECT POSITIONS
INCORRECT POSITIONS
WRONG
WRONG WRONG
WRONG
Heater Movement
Heater
Movement
Heater Movement
Heater
Movement

Series GR Page 19 February 10, 2014
Electrical Wiring
General Requirements
Heaters are normally controlled with the thermostat that is included with your equipment. A 24V signal is
supplied by the heater control module for thermostat connection. Refer to wiring diagram, Figure 16. A
bulkhead fitting in the back panel of the control box is provided for the appropriate wire. In all cases,
heaters must be grounded in accordance with the National Electric Code, ANSI/NFPA 70 in the USA, and
the Canadian Electric Code, CSA C22.1 in Canada, and must comply with all local requirements.
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.
Figure 16: Internal Wiring
THERMOSTAT IS
24V STAT
TRANSFORMER
NEUTRAL
BURNER
MOUNTED EXTERNALLY
TH Red
BLOWER
HV S1
GND
24V
V2
Pink
Green
IND
L1
PSW
V1
Black
Black
Blue
IGNITER
SENSOR
Yellow
Purple
24V
Black
AIR
SWITCH
L1
Red
FENWALL DSI
WIRING DIAGRAM
Yellow
FENWALL DSI
MODEL RE
GAS VALVE
Brown
Purple BlueBlue
120V
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
FENWALL DSI
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
24 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.

Series GR Page 20 February 10, 2014
Operation / Maintenance
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 following minimal maintenance procedures should be performed before each
heating season:
Before performing any service 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.
Check inside the heat exchanger tube visually with a flashlight. If carbon or scale are present,
scrape or otherwise remove deposits (a wire brush works well).
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 heat exchanger 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.