SunSpan S series User manual

SunSpan Form S-IOM-26B 210060
S-Series (Single-Stage)
S2S-Series (2-Stage)
GAS-FIRED HIGH-INTENSITY INFRA-RED HEATERS
INSTRUCTIONS APPLY TO:
o Installation o Operation o Maintenance
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, injury or death. Read the installation,
operating, and service/maintenance instructions
thoroughly before installing or servicing this
equipment.
HAZARD INTENSITY LEVELS
•DANGER: Failure to comply will result in severe
personal injury or death and property damage.
•WARNING: Failure to comply could result in
severe personal injury or death and/or property
damage.
•CAUTION: Failure to comply could result in minor
personal injury and/or property damage.
WARNING
Gas-fired appliances are not designed for use in
hazardous atmospheres containing flammable
vapors or combustible dust, or atmospheres
containing chlorinated or halogenated
hydrocarbons.
FOR YOUR SAFETY
The use and storage of gasoline or other flammable
vapors and liquids in the vicinity of this appliance is
hazardous. FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Do not touch electrical switches.
3. Extinguish any open flame.
4. Immediately call your gas supplier.
5. If gas supplier cannot be reached, call fire
department.
FOR INDOOR INSTALLATION ONLY.
NOT FOR RESIDENTIAL USE.
CONTENTS
Section Page
1. General Information and Installation Codes.…..2
2. Canadian Codes………………………………….3
3. Unpacking…………………….………..………....4
4. Restrictions……………………………..………...4
5. Basic Dimensions……..…………………………4
6. Clearance to Combustibles……………………..5
7. Mounting Considerations………………...….…..6
8. Ventilation Requirements………………………..7
9. Gas Supply………………………………………..7
10. Electrical Supply………………………………….8
11. Installation………….…………………………….10
12. Ignition, Operation and Shutdown...……...……12
13. Gas Pressure and Gas Conversion..…...…..…16
14. Maintenance……………………..…….…………16
15. Accessories…………………………..………..…17
16. Replacement Parts…………………………..…..17
17. Troubleshooting………………………………….18
These heaters must NOT be used in the
following applications:
•Enclosed swimming pool areas.
•Areas with contaminated atmospheres.
•Areas requiring explosion-proof equipment.
•Process heating applications.
ATTENTION
Mount a copy of these instructions adjacent to the
heater and retain a copy for future reference.

Page 21. GENERAL INFORMATION AND INSTALLATION CODES
WARNING
•These infrared heaters are the unvented type. Products of combustion generated are released into the space
being heated. When operating heaters, air for ventilation MUST be provided as per the Ventilation
Requirements section.
GENERAL INFORMATION
•These heaters are CSA International Designed Certified and manufactured in compliance with the Standard for Gas-
Fired High-Intensity Infrared Heaters, ANSI Z83.19 / CSA 2.35-latest edition, approved by the American National
Standards Institute (ANSI) and the Canadian Standards Association (CSA) for indoor installation only.
•These heaters are approved for commercial and industrial installation only.
•These heaters MUST be installed and serviced ONLY by trained and qualified gas installation and service
personnel. The installing contractor must be familiar with all the various requirements and is responsible for
installing each heater in compliance with these instructions and all applicable codes of all authorities having
jurisdiction, local, state, provincial and national.
•These heaters should not be installed in buildings with uninsulated metal roof decks. Uninsulated metal roof decks will
cause condensation of water vapor (contained in the heater flue gas) on the inside of the building. Metal roof decks
must be insulated using built-up insulation and roofing on the exterior or, inside insulation that is not permeable to
water vapor. Interior insulation that is permeable to water vapor must be completely sealed with a vapor barrier.
HIGH ALTITUDE
•These heaters are manufactured for use at the specific altitude range stated on the heater serial plate. Do not install
heater if it is not rated for the correct altitude. Contact factory if in doubt.
LOCAL APPROVALS
•Single-stage heaters have been granted local approval by New York City (MEA 418-86-E).
•Single-stage heaters have been granted CE approval.
INSTALLATION CODES
•The installation must conform with local building codes or, in the absence of local codes, with the National Fuel Gas
Code ANSI Z223.1 / NFPA 54-latest edition, or the Natural Gas and Propane Installation Code, CSA B149.1.
•In locations used for the storage of combustible materials, signs shall be posted to specify the maximum permissible
stacking height to maintain required clearances from the heater to the combustibles.
•Natural or mechanical means shall be provided to supply and exhaust [combustion and ventilation air at a rate of] at
least [4 CFM per 1000 BTUH] 4 ft3/min/1000 Btu/hr (0.38m3/min/kW) input of installed heaters.
•Exhaust openings for removing flue products shall be above the level of the heaters.
•If an external electrical source is utilized, the heater, when installed, must be electrically grounded in accordance with
the National Electric Code, ANSI / NFPA 70-latest edition.
•All NFPA publications are available from the National Fire Protection Association, Batterymarch Park, Quincy,
Massachusetts, MA 02269 USA.
AIRCRAFT HANGARS
•These overhead heaters are suitable for use in aircraft hangars when installed in accordance with the Standard for
Aircraft Hangars, NFPA 409-latest edition, and are so marked.
•In aircraft storage and servicing areas, heaters shall be installed at least 3 m (10 ft) above the upper surface of wings
or of the engine enclosures of the highest aircraft that might be housed in the hangar. The measurement shall be
made from the wing or engine enclosure, whichever is higher from the floor, to the bottom of the heater.
•In shops, offices, and other sections of the aircraft hangars communicating with the aircraft storage or servicing areas,
the bottom of the heaters shall be installed not less than 2.4 m (8 ft) above the floor.
•In all hangars, suspended or elevated heaters shall be located in spaces where they shall not be subject to injury by
aircraft, cranes, movable scaffolding, or other objects. Provisions shall be made to ensure accessibility to suspended
heaters for recurrent maintenance purposes.
REPAIR GARAGES
•These overhead heaters are suitable for use in repair garages when installed in accordance with the Standard for
Motor Fuel Dispensing Facilities and Repair Garages, NFPA 30A-latest edition (formerly Standard for Repair Garages,
NFPA 88B), and are so marked.
•Heat producing appliances using gas or oil fuel listed for use in garages shall be permitted to be installed in lubrication
rooms, service rooms, or fuel dispensing areas where Class I liquids are dispensed or transferred, provided the
equipment is installed at least 2.4m (8 ft) above the floor.
PARKING STRUCTURES
•These overhead heaters are suitable for use in parking structures when installed in accordance with the Standard for
Parking Structures, NFPA 88A-latest edition, and are so marked.
•All flames associated with heating equipment shall be located a minimum of 500 mm (18 in.) below the floor-ceiling
assembly or 500 mm (18 in.) above the floor. WARNING
•An overhead heater should be installed so that the minimum clearances marked on the heater will be
maintained from vehicles parked below the heater. (ANSI Z83.19, section 1.25.3.d.)

Page 3
2. CANADIAN CODES
•The information on this page applies specifically to installations in Canada.
INSTALLATION CODES
•These heaters are CSA International Designed Certified and manufactured in compliance with the Standard for Gas-
Fired High-Intensity Infrared Heaters, CAN/CSA 2.35-latest edition, approved by the Canadian Standards Association
(CSA), for indoor installation only.
•The installation must conform with local building codes or, in the absence of local codes, with the current Canadian
Natural Gas and Propane Installation Code, CAN/CSA B149.1-latest edition. Canadian authorities having jurisdiction
should be consulted, before installations are made, to verify local codes and installation procedures.
•The heater shall be protected against physical damage.
•The heater shall not be installed in any location where a flammable vapour, combustible dust or fibres, or an explosive
mixture is present.
•The heater shall not be installed in a residential or care or detention occupancy building.
•The heater shall be provided with mechanical ventilation for combustion and ventilation air
(1) that is so located that products of combustion from each heater are effectively removed outdoors;
(2) that has a ventilation volume of at least [3 CFM per 1000 BTUH] 300 cfm (142 dm
3
/s) for each 100 000 Btuh
(30kW) input or fraction there of; and
(3) is sufficient to maintain the level of carbon dioxide at less than 5000 ppm measured 6 ft (2m) above the work
area.
•The heater shall have the ventilation system so interlocked that any reduction of the volume of airflow required in the
above note for a heater or group of heaters will cause the shutdown of that heater or group of heaters.
•The heater shall not be installed in an exit passageway or stairway within 8 ft (2.5m) measured horizontally from an exit
door.
•The heater shall be provided with clearance from combustible materials as certified and indicated on the heater.
•If an external electrical source is utilized, the heater, when installed, must be electrically grounded in accordance with
the Canadian Electric Code, CAN/CSA C22.1-latest edition.
AIRCRAFT HANGARS
•These overhead heaters are suitable for use in aircraft hangars when installed in accordance with the Canadian
Natural Gas and Propane Installation Code, CAN/CSA B149.1-latest edition.
•A heater located in an aircraft storage or servicing area shall be installed so that no portion of an aircraft that can
occupy the area that is within the clearance to combustible material, as marked on the heater rating plate.
•When an infrared heater is installed in either a repair or shop area that communicates with an aircraft hangar, the
minimum clearance from the floor to the infrared heater shall be 8 ft (2.4m).
•An infrared heater shall not be located in an area of an aircraft hangar where it can be subjected to physical damage by
aircraft, cranes, movable scaffolding, or other objects.
GARAGES
•These overhead heaters are suitable for use in garages when installed in accordance with the Canadian Natural Gas
and Propane Installation Code, CAN/CSA B149.1-latest edition.
•The minimum clearance from the radiant face of the infrared heater to the upper surface of the highest vehicle shall not
be less than the certified clearance from combustible material as indicated on the heater [installed in a garage or a car
wash]. Provision shall be made to maintain these minimum specified clearances by an interlock that shuts off the gas
supply until the required clearances have been re-established, a protective bar, or a device that provides a warning
when the clearances are not being maintained.
•Where an infrared heater is installed in a garage and the clearance from combustible material cannot be maintained
when the vehicle is raised on a hoist, an electrical interlock shall be provided to shut off the burner and prevent its
operation until the required clearance has been re-established.
WARNING
•An overhead heater should be installed so that the minimum clearances marked on the heater will be
maintained from vehicles parked below the heater. (CAN/CSA 2.35, section 1.25.3.d.)

Page 4
B
A
13.000"
(330mm)
C
23.719"
(603mm)
8.500"
(216mm)
3. UNPACKING
•This heater is completely assembled, 100% factory tested, inspected prior to shipment, and ready for installation.
•Review the transportation company's bill of lading and/or freight bill. Observe and confirm the number of packages
received agrees with the quantity indicated on the documents. If there is any disagreement or any part of the shipment
is visibly damaged, note the nature and extent of it on the documents. If damage is discovered after delivery, leave the
damaged material in the original shipping container(s) and immediately call the transportation company and request for
an inspection to be made. 4. RESTRICTIONS
•Use for process heating applications VOIDS the warranty and CSA design certification.
•These heaters are RESTRICTED from use for the following applications, which will also VOID the warranty and
CSA design certification.
WARRANTY VOID IF UNIT IS…
•Used in atmospheres containing flammable vapors or atmospheres containing chlorinated or halogenated
hydrocarbons or atmospheres containing explosive dusts.
•Installed without proper clearance to combustible materials or in a location where the heater controls can be subjected
to ambient temperatures above 150°F (66°C) or below -40°F (-40°C).
•Installed at angles not approved for the model.
•Installed for other than space heating applications.
•Installed for residential use. (HEATER IS NOT FOR RESIDENTIAL USE.)
•Installed outdoors.
•Installed in enclosed swimming pool areas.
•Altered. Units are completely factory assembled and tested.
5. BASIC DIMENSIONS
FIGURE 1 – LENGTHS, WIDTH AND HEIGHT
Note: Four (4) mounting holes .375”
(9.5mm)
diameter for balanced suspension are located by dimensions B x 13.000”
(330mm).
LEGEND MODEL A B C
MBTUH (kW) inches (mm) inches (mm) inches (mm)
30 – 60 (9-18) 15.312 (389) 14.625 (372) 16.625 (422)
70 – 100
*90/45
*100/50
(21-29)
*(26/13)
*(29/15) 23.938 (608) 23.250 (591) 25.250 (641)
110 – 160N
*120/80
*150/100
(32-47N)
*(35/23)
*(44/29) 32.563 (827) 31.875 (810) 33.875 (860)
160L – 200
*160/80
*200/100
(47L-59)
*(47/23)
*(59/29) 41.188 (1046) 40.500 (1029) 42.500 (1080)
* = 2-stage models, L = LP/propane gas, N = Natural gas

Page 5
B
A
A
C
D
B
D
C
EE
B
D
C
6. CLEARANCE TO COMBUSTIBLES
WARNING
•Single or multi-heater placement must be such that continuous operation of the heater or heaters will not
cause combustible materials or materials in storage to attain a temperature in excess of 150°F (66°C).
•Under no circumstances should this heater be installed in a combustible atmosphere or in a location where the
heater controls can be subjected to ambient temperature in excess of 150°F (66°C).
•These heaters MUST be mounted with minimum clearances between the combustion surface and combustible
materials. See Table 1, Clearance to Combustibles Requirements and Figure 2, Clearance to Combustibles Diagrams.
TABLE 1. CLEARANCE TO COMBUSTIBLES REQUIREMENTS
NATURAL GAS MODELS
MBTUH = 1000 Btu/hour 30–601,2 70–1003 *100/503 110–150 *150/100 1603 175–200 *200/100
PROPANE GAS MODELS
MBTUH = 1000 Btu/hour 50 70–903 *90/45 3 120 *120/80 1603 *160/803
CLEARANCE TO COMBUSTIBLES inches (cm) inches (cm) inches (cm) inches (cm) inches (cm)
SIDE OF HEATER (A) 30 (76) 36 (91) 46 (117) 48 (122) 48 (122)
BACK OF HEATER (B) 30 (76) 30 (76) 33 (84) 33 (84) 33 (84)
TOP OF HEATER (C):
- Mounting Angle 5-29° (C) 60 (152) 62 (157) 64 (163) 68 (173) 68 (173)
- Mounting Angle 30° ONLY (C) 48 (122) 50 (127) 58 (147) 68 (173) 68 (173)
- w/ Optional Heat Deflector 5-30° (C) 34 (86) 38 (97) na na na
BELOW HEATER (D):
- Standard Reflector (D) 80 (203) 105 (267) 125 (318) 140 (356) 140 (356)
- w/ Optional Parabolic Reflector (D) 110 (279) 135 (343) 165 (419) 180 (457) 180 (457)
NATURAL GAS MODELS
(Kilowatts) (9-18) 1,2 (21-29)3 *(29/15)3 (32-44) *(44/29) (47)3 (51-59) *(59/29)
PROPANE GAS MODELS
(Kilowatts) (15) (21-26)3 *(26/13)3 (35) *(35/23) (47)3 *(47/23)3
Notes: 1 = 30 and 35 MBTUH (9 and 10kW) models not available in Canada; 2= 60 MBTUH (18kW) models require wire
grid in Canada; 3= See Table 4, Allowable Mounting Angles, in the Installation section. na = Not available. (A), (B), (C),
and (D) refer to Figure 2, Clearance to Combustibles Diagrams. *= 2-stage models.
FIGURE 2 – CLEARANCE TO COMBUSTIBLES DIAGRAMS
3D VIEW 30 – 60 MBTUH (9-18KW) ALL MODELS STACKING HEIGHT
LEGEND
Symbol Item Description
ASide of heater clearance to combustibles
BBack of heater clearance to combustibles
CTop of heater clearance to combustibles
DBelow heater clearance to combustibles
EMounting angle, see Table 4, Allowable Mounting Angle
HMaximum stacking height of combustible materials
MMounting height
•In locations used for the storage of combustible materials, signs shall be posted to specify the maximum permissible
stacking height to maintain required clearances from the heater to combustibles. (ANSI Z233.1/NFPA 54)
•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 plastic, vinyl siding, canvas, tri-ply, etc.) may be subject to
degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent materials are protected
from degradation. (ANSI Z83.19)
•It is recommended more distance than the minimum clearance be maintained above the unit whether or not the
construction is combustible to reduce and/or eliminate hot spots and possible staining of painted ceiling surfaces.
•If the unit must be close to the roof or ceiling, interpose a non-combustible baffle (twice the size of the reflector)
between the unit and the roof or ceiling. Allow at least 2” (5cm) between the roof or ceiling and the non-combustible
baffle. Allow at least 12” (31cm) between the non-combustible baffle and the top of the heater.
D
H
M

Page 6 7. MOUNTING CONSIDERATIONS
•These heaters shall be installed with clearances from combustible material as specified in the Clearance to
Combustibles section.
•Heaters should also be located with respect to building construction and equipment so as to provide sufficient
clearance and accessibility for servicing and cleaning.
•See Table 2, Recommended Mounting Height. A mounting height lower than the recommended mounting height may
be used if personnel are not required to stay directly under the heater.
•See Table 3, Recommended Distance from a Wall for Heaters Mounted At 5°.
TABLE 2. RECOMMENDED MOUNTING HEIGHT
MODELS With Standard Reflector
AT 5°
With
Standard Reflector
AT 30º
With Optional
Parabolic Reflector
AT 5°
With Optional
Parabolic Reflector
AT 30º
MBTUH (kW) feet (m) feet (m) feet (m) feet (m)
30 (9) 11.0 – 13.0 (3.4 - 4.0) 10.0 – 12.0 (3.0 - 3.7)
40 (12) 12.0 – 14.5 (3.7 - 4.4) 11.5 – 13.5 (3.5 -4.1)
50 (15) 13.5 – 15.5 (4.1 - 4.7) 12.5 – 14.5 (3.8 - 4.4) 15.5 – 18.5 (4.7 - 5.6) 14.0 – 17.0 (4.3 - 5.2)
60 (18) 14.5 – 16.5 (4.4 - 5.0) 13.0 – 15.0 (4.0 - 4.6) 16.0 – 20.0 (4.9 - 6.1) 15.0 – 18.0 (4.6 - 5.5)
70 (21) 15.0 – 17.0 (4.6 - 5.2) 13.5 – 15.5 (4.1 - 4.7) 17.5 – 20.5 (5.3 - 6.2) 16.0 – 19.0 (4.9 - 5.8)
80 (23) 15.5 – 18.0 (4.7 - 5.5) 14.0 – 16.5 (4.3 - 5.0) 18.5 – 21.5 (5.6 - 6.6) 17.0 – 20.0 (5.2 - 6.1)
90
*90/45 (27)
*(26/13)
16.0 – 18.5 (4.9 - 5.6) 14.5 – 17.0 (4.4 - 5.2) 19.5 – 22.5 (5.9 - 6.9) 17.5 – 20.5 (5.3 - 6.2)
100
*100/50 (29)
*(29/15)
17.0 – 19.5 (5.2 - 5.9) 15.0 – 17.5 (4.6 - 5.3) 20.5 – 23.5 (6.2 - 7.2) 18.5 – 21.5 (5.6 - 6.6)
110 (32) 17.0 – 20.0 (5.2 - 6.1) 15.0 – 18.0 (4.6 - 5.5) 21.0 – 24.5 (6.4 - 7.5) 19.0 – 22.0 (5.8 - 6.7)
120
*120/80 (35)
*(35/23)
17.5 – 21.0 (5.3 - 6.4) 15.5 – 18.5 (4.7 - 5.6) 21.5 – 25.0 (6.6 - 7.6) 20.0 – 23.0 (6.1 - 7.0)
130 (38) 18.0 – 21.0 (5.5 - 6.4) 16.0 – 19.0 (4.9 - 5.8) 22.5 – 26.0 (6.9 - 7.9) 20.5 – 23.5 (6.2 - 7.2)
150
*150/100 (44)
*(44/29)
18.5 – 22.5 (5.6 - 6.9) 16.5 – 20.0 (5.0 - 6.1) 24.0 – 27.5 (7.3 - 8.4) 21.5 – 24.5 (6.6 - 7.5)
160
*160/80 (47)
*(47/23)
19.0 – 23.0 (5.8 - 7.0) 17.0 – 20.5 (5.2 - 6.2) 25.0 – 28.5 (7.7 - 8.7) 22.5 – 25.5 (6.9 - 7.8)
175 (51) 19.5 – 23.5 (5.9 - 7.2) 17.5 – 21.0 (5.3 - 6.4) 25.5 – 29.0 (7.8 - 8.8) 23.0 – 26.5 (7.0 - 8.1)
200
*200/100 (59)
*(59/29)
20.5 – 25.0 (6.2 - 7.6) 18.5 – 22.5 (5.6 - 6.9) 27.0 – 31.0 (8.2 - 9.4) 24.5 – 28.0 (7.5 - 8.5)
* = 2-stage models
TABLE 3. RECOMMENDED DISTANCE FROM A WALL FOR HEATERS MOUNTED AT 5°
MODELS With
Standard Reflector With Optional Parabolic Reflector Maximum Distance Between Heater Rows
MBTUH (kW) feet (m) feet (m) feet (m)
30 – 40 (9-12) 8(2.4) 5(1.5) 90 (27.4)
45 – 60 (13-18) 12 (3.7) 9(2.7) 100 (30.5)
70 – 75 (21-22) 14 (4.3) 11 (3.4) 105 (32.0)
80 – 100
*90/45
*100/50
(23-29)
*(26/13)
*(29/14) 16 (4.9) 12 (3.7) 110 (33.5)
110 – 125
*120/80 (32-37) *(35/23) 18 (5.5) 14 (4.3) 115 (35.1)
130 – 150
*150/100 (38-44) *(44/29) 20 (6.1) 15 (4.6) 120 (36.6)
160 – 200
*160/80
*200/100
(47-59)
*(47/23)
*(59/29) 24 (7.3) 20 (6.1) 130 (39.6)
* = 2-stage models

Page 7
E
C
B
A
DH
J
F
G
8. VENTILATION REQUIREMENTS
WARNING
•Insufficient ventilation may result in health problems, carbon monoxide poisoning or death. Always vent
enclosed spaces and buildings according to national, state, provincial and local codes.
•Improper venting may result in asphyxiation, fire, explosion, injury or death.
•These heaters must be installed and serviced ONLY by trained and qualified gas installation and service personnel.
The installing contractor must be familiar with all the various requirements and is responsible for installing each heater
in compliance with all applicable local and national codes.
•These infrared heaters are the unvented type. Products of combustion generated are released into the space being
heated. Ventilation is required to dilute and remove the products of combustion and provide fresh air for efficient
combustion.
•Natural or mechanical means shall be provided to supply and exhaust [air at a rate of] at least [4 CFM per 1000 BUTH]
4 ft3/min/1000 Btu/hr (0.38m3/min/kW) input of installed heaters. (ANSI Z223.1/NFPA 54, section 10.18.)
•Exhaust openings for removing flue products shall be above the level of the heaters. (ANSI Z223.1/NFPA 54, section
10.18, Infrared Heaters.)
•Air for combustion, ventilation, and dilution of flue gases shall be obtained by application of one of several methods
described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, section 9.3, Air for Combustion and Ventilation.
•The ventilation technical information outlined in the current ASHRAE Handbooks should be observed when locating
vents.
•Local codes may permit the use of humidistat control to remove water vapor and products of combustion. Humidistat
settings will typically be in the 40-55% relative humidity range.
•For installations in Canada see the Canadian Codes section.
9. GAS SUPPLY
WARNING
•Do not install any gas piping above the heater or in heat zones.
•The gas supply piping shall NOT be used to support the heater.
•All components of a gas supply system must be leak tested prior to placing equipment into service.
•NEVER test for gas leaks with an open flame. Use non-corrosive leak detecting solution.
CAUTION
•Isolate heater from gas supply line during high-pressure leak testing of gas supply piping.
•All gas piping must be installed according to local codes and/or the National Fuel Gas Code, ANSI Z223.1 / NFPA 54-
latest edition. Use new clean pipe. Inspect and clean out any chips or debris before installing the pipe and fittings.
•Piping joint compound must be resistant to the action of liquefied petroleum (LP) gases.
•Piping must have a drip leg trap 6” (15 cm) long at the inlet connection. (C)
•A first stage pressure regulator is required when gas supply pressure exceeds 14” (35cm) water column (WC). When
required, be sure this regulator is installed with the arrow indicating gas flow pointing in the proper direction. (E)
•An over-pressure protection device (OPD) may be required in certain jurisdictions.
•Install a 1/8” (3.2mm) National Pipe Thread (NPT) plugged tap, accessible for test gauge connection, immediately
upstream of the gas supply connection to the heater. (F)
•An agency approved flexible gas connector may only be used if permitted by local code. (G)
•Always use two wrenches when mating pipe connections to the heater. Excessive torque on the heater manifold may
misalign gas orifices leading to heater malfunction.
•Do not subject gas pressure regulators, flex connectors and gas cocks on the heater to test pressure over 14” (35cm)
water column (WC) while checking for piping leaks.
•All piping joints must be tested for gas leaks with a non-corrosive leak detecting solution.
•Purge all gas supply lines of air completely before attempting to ignite heater.
•See Figure 3, Gas Supply Piping Diagram for additional information about the above notes.
FIGURE 3 – GAS SUPPLY PIPING DIAGRAM LEGEND
Symbol Item Description
AMain gas supply pipe line
B½” (13mm) drop gas pipe line
CDrip leg 6” (15cm) long
DGas cock (by others)
EFirst stage regulator required when gas pressure
exceeds 14” (35cm) water column (WC) (by others)
FGas cock (component of flexible gas connector
assembly) with plugged pressure tap
GFlexible gas connector (if permitted)
HHeater gas valve with manifold pressure tap
JHeater gas manifold

Page 8 10. ELECTRICAL SUPPLY (1 OF 2)
WARNING
•If an external electrical source is utilized, the heater, when installed, must be electrically grounded in
accordance with the National Electric Code, ANSI/NFPA 70-latest edition, or the Canadian Electrical Code, CSA
C22.1-latest edition.
•Electrical supply lines shall NOT be used to support the heater.
•Do not run electrical wiring above the heater or in direct view of radiant heat.
GENERAL REQUIREMENTS FOR 120 VAC AND 24 VAC DIRECT SPARK IGNITION (DSI) MODELS
•The electrical supply wiring to the heaters using 120 VAC or 24 VAC must be installed in accordance with local
codes or the National Electric Code, ANSI/NFPA 70-latest edition.
•IMPORTANT! The electrical power supply MUST be properly grounded and properly polarized. The heater
controls are extremely polarity sensitive and the heater will cycle on and off erratically if the electrical supply
is not wired correctly. Have a qualified electrician check that the electrical supply circuit is properly grounded
and that the electrical supply polarity is correct.
•The following types of grounding are NOT permitted by code: grounding to building structures, grounding to
electrical conduit, grounding to gas pipelines or grounding to water pipelines.
•Electrical power supply takeoff must be connected to a circuit breaker or to a separately fused circuit with a disconnect.
•Neither thermostats, nor switches, nor field wiring are supplied as standard equipment. When thermostats are included
to control the temperature of the heated zone, they should be incorporated into the electrical circuit as shown in the
respective diagrams and be positioned per the thermostat manufacturer’s instructions.
•Important: In the event of an electrical fault after installation of the appliance, preliminary system checks are required
to be carried out, i.e. ground continuity, polarity and resistance to ground, by a trained and qualified electrician.
•Make electrical connection to the heater as described in the Installation section.
120 VAC DIRECT SPARK IGNITION (DSI) MODELS
•Electrical supply: 120 VAC - 60 Hz - 1 Phase.
•Maximum total heater current draw: 0.14 Amps.
•Total heater power consumed: 16.8 VA (16.8W).
•3-wire field service required.
•Field wiring having a minimum temperature rating of at least 302oF (150oC) shall be used and supply circuit wiring shall
have a minimum size of 16 AWG (1.0mm2).
•Make connections as shown in Figure 4, 120 VAC DSI Heater Electrical Supply and Thermostat Wiring.
24 VAC DIRECT SPARK IGNITION (DSI) SINGLE-STAGE MODELS
•Electrical supply: 24 VAC - 60 Hz - 1 Phase.
•Maximum total heater current draw: 0.66 Amps.
•Total heater power consumed: 15.9 VA (15.9W).
•2-wire field service required.
•Field wiring having a minimum temperature rating of at least 302oF (150oC) shall be used and supply circuit wiring shall
have a minimum size of 16 AWG (1.0mm2).
•Make connections as shown in Figure 5, 24 VAC DSI Single-Stage Heater Electrical Supply and Thermostat Wiring.
24 VAC DIRECT SPARK IGNITION (DSI) 2-STAGE MODELS
•Electrical supply: 24 VAC - 60 Hz - 1 Phase.
•Maximum total heater current draw: 0.96 Amps.
•Total heater power consumed: 23.1 VA (23.1W).
•3-wire field service required to 2-stage thermostat. 4-wire thermostat cable required from thermostat to heater.
•Field wiring use 18/4 [18 AWG (0.8mm2)/4-conductor] solid class 2 thermostat cable having a minimum insulation
temperature of 140°F (60°C) between thermostat and heater. Maximum length is 125 feet (38m).
•Make connections as shown in Figure 6, 24 VAC DSI 2-Stage Heater Electrical Supply and Thermostat Wiring.

Page 9
GND
(-)
(+120)
GGS
BK
TS
H1
BK
GGS
H2
VR* SW*
MV*
W W
GND
(+24)
GGS
BL
TS
H1
BL
GGS
H2
VR* SW*
MV*
GND
(-)
(+24)
GGS
BLR
2ST
H1
C
G
R
W2
W1
R
BL
GGS
H2
VR* SW*
MV*
10. ELECTRICAL SUPPLY (2 OF 2)
FIGURE 4 – 120 VAC DSI HEATER ELECTRICAL SUPPLY AND THERMOSTAT WIRING*
LEGEND
(+120) = 120 VAC Supply Voltage
(-) = Supply Neutral
GND = Earth Ground
MV* = Mechanical Ventilation*
VR* = Ventilation Relay*
SW* = Ventilation Interlock Switch*
(normally opened)
TS = Thermostat
H1 = Heater #1
H2 = Heater #2
GGS = Green Ground Screw
(inside control box)
W = White Wire – Neutral
BK = Black Wire – 120 VAC call for heat
•Field wiring having a minimum temperature rating of at least 302oF (150oC) shall be used and supply circuit wiring shall
have a minimum size of 16 AWG (1.0mm2).
•See common notes at the bottom of the page.
FIGURE 5 – 24 VAC DSI SINGLE-STAGEHEATER ELECTRICAL SUPPLY AND THERMOSTAT WIRING*
LEGEND
(+24) = 24 VAC Supply Voltage
GND = Earth Ground
MV* = Mechanical Ventilation*
VR* = Ventilation Relay*
SW* = Ventilation Interlock Switch*
(normally opened)
TS = Thermostat
H1 = Heater #1
H2 = Heater #2
GGS = Green Ground Screw
(inside control box)
BL = Blue Wire – 24 VAC call for heat
•Field wiring having a minimum temperature rating of at least 302oF (150oC) shall be used and supply circuit wiring shall
have a minimum size of 16 AWG (1.0mm2).
•See common notes at the bottom of the page.
FIGURE 6 – 24 VAC DSI 2-STAGEHEATER ELECTRICAL SUPPLY AND THERMOSTAT WIRING*
LEGEND
(+24) = 24VAC Supply Voltage
(-) = Supply Neutral
GND = Earth Ground
MV* = Mechanical Ventilation*
VR* = Ventilation Relay*
SW* = Ventilation Interlock Switch*
(normally opened)
2ST = 2-Stage Thermostat
H1 = Heater #1
H2 = Heater #2
GGS = Green Ground Screw
(inside control box)
BL = Blue Wire – 24 VAC call for
LOW heat
R (on heater) = Red Wire – 24 VAC call for
HIGH heat
•
Field wiring having a minimum temperature rating of at least 140
o
F
(60
o
C)
shall be used and supply circuit wiring shall
have a minimum size of 18 AWG (0.8mm2).
•Use 18/4 solid class2 thermostat cable between heater and thermostat with a maximum length of 125 feet (38m).
•See common notes at the bottom of the page.
COMMON NOTES FOR FIGURES 4, 5 AND 6.
•* Mechanical ventilation interlock required when all combustion air is provided by a mechanical air supply system.
•#10 ring terminal required for ground service conductor (by others) to attach to green ground screw on heater.
•The heater control is extremely polarity sensitive and the heater will cycle on and off erratically if the electrical supply is
not wired correctly. Have a qualified electrician check that the electrical supply circuit is properly grounded and that the
electrical supply polarity is correct.
•All components purchased separately. All wiring provided by others.

Page 10
C
B
A
D
F
E
11. INSTALLATION (1 OF 2)
•Before installing heater, check the supporting structure to determine it has sufficient load carrying capacity to support
the weight.
•The heater shall be supported independent of gas and electric supply lines.
•Hangers and brackets shall be of noncombustible material.
•The heater should be supported by chains or drop rods or brackets fixed to vertical surfaces, which have been
previously installed.
•The specified clearance to combustible materials must be maintained. See Clearance to Combustibles section.
•Heaters mounting angle must be within the range allowed as listed in Table 4, Allowable Mounting Angles.
TABLE 4. ALLOWABLE MOUNTING ANGLES
SINGLE-STAGE HEATERS *2-STAGE HEATERS
MODEL NET
WEIGHT MODEL NET WEIGHT
MBTUH (kW) lbs. (kg)
ALLOWABLE
MOUNTING
ANGLE RANGE MBTUH (kW) lbs. (kg)
ALLOWABLE
MOUNTING
ANGLE RANGE
30 – 60 (9-18) 24 (11) 5° – 30° *90/45 *(26/13) 42 (19) 5° – 30°
70 – 100 (21-29) 34 (16) 5° – 30° *100/50 *(29/15) 42 (19) 5° – 30°
110 – 150 (32-44) 44 (20) 5° – 30° *120/80 *(35/23) 53 (23) 5° – 30°
160 (47) 56 (26) 5° – 30° *150/100 *(44/29) 53 (23) 5° – 30°
175 – 200 (51-59) 56 (26) 5° – 30° *160/80 *(47/23) 66 (30) 5° – 30°
*200/100 *(59/29) 66 (30) 5° – 30°
•DO NOT ANGLE HEATERS MORE THAN 30°.
•These heaters may be mounted rigidly with 3/8” (10mm) all thread rigid mount hangers or they may be suspended with
chain and S-hooks. Local codes may require rigid mounting.
•Check local codes for mounting requirements and permission to use flexible gas connectors. It is recommended that
either the gas connection piping or the mounting be flexible to prevent fatigue failure of the gas connection from
vibration or thermal expansion.
•For proper operation, the heater must be level, whether horizontal or angle mounted. When angle mounted, all models
must be installed with the gas manifold located on the low end. See Figure 7, Typical Heater Mounting, Chain or Rigid.
FIGURE 7 – TYPICAL HEATER MOUNTING, CHAIN OR RIGID
•Overhead structure and field connections must be
adequate to support heater weight.
•Gas and electrical supply lines must not cross over top
of heater or in the path of flue products.
LEGEND
Symbol Item Description
A3/8” (10mm) all thread rigid mount (used in
aircraft hangars or where draft conditions may be
expected)
B1/0 Tenso chain mounting
CS-hooks: ¼” (6.3mm) diameter wire (Crimp all S-
hooks closed.)
DMounting angle, see Table 4, Allowable
Mounting Angles
EHeater gas manifold must be horizontal along the
low side of the heater when angle mounting
FHeater gas valve
•Under no circumstances should either the gas or electrical supply lines to the unit be used to provide support
in suspension. Do not run any gas or electric lines above or below the heater or near the path of the flue
products.
•Heaters located in an aircraft hangar or near overhead doors should be rigidly mounted to prevent swinging. The
installer is responsible for the type of suspension used for the heater.
•If permissible by local code, it is recommended that these heaters be suspended with chain and S-hooks, See Figure 8,
Chain Hanging Arrangement. Chain with 200# (91kg) working load (1/0 Tenso) is recommended. S-hooks must be a
minimum of ¼” (6.3mm) diameter wire (Chicago Hardware #5 or equal) and must be crimped closed after installation.
•See Figure 9, Optional Heater Mounting [30 – 60 MBTUH (9-18kW) Models Only] for a mounting option limited to
models with only one burner.