Modine Manufacturing IHR 60 Manual

WARNING
!
!
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.
Gas-Fired appliances are not designed for use in
hazardous atmospheres containing flammable
vapors or combustible dust, or atmospheres
containing chlorinated or halogenated
hydrocarbons.
The use and storage of gasoline or other flammable
vapors and liquids in the vicinity of this appliance is
hazardous.
• 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.
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.
• Enclosed swimming pool areas
• Areas with contaminated atmospheres.
• Areas requiring explosion-proof equipment.
• Process heating applications.
FOR YOUR SAFETY
HAZARD INTENSITY LEVELS
CONTENTS
FOR YOUR SAFETY
ATTENTION
These heaters must NOT be used in the
following applications:
Mount a copy of these instructions adjacent
to the heater and retain a copy for future
reference.
FOR INDOOR INSTALLATION ONLY.
NOT FOR RESIDENTIAL USE.
9 -512
January 2017
INSTALLATION AND SERVICE MANUAL
High Intensity Gas Fired Infrared Unit Heaters
Model IHR, Control Codes 47, 48, 97, 98, 27, and 67
INSTRUCTIONS APPLY TO:
Installation Operation Maintenance
Section Page
1. Safety ....................................................................3
2. Installation.............................................................9
3. Operation ............................................................ 19
4. Maintenance .......................................................20
5. Limited Warranty.................................................24

IHR Series Manual
2
Contents
1.0 Safety.................................................................... 3
Safety Symbols ....................................................... 3
Applications .......................................................... 3
Clearance to Combustibles .............................................. 4
Gas Connection....................................................... 6
Standards, Certifications and Government Regulations ........................ 6
Safety Signs and Labels ................................................ 8
2.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Heater Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Total Area Heating ..................................................10
Spot Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Heater Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Ventilation ...........................................................13
Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Electrical Requirements and Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.0 Operation ................................................................19
4.0 Maintenance ..............................................................20
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Heater Assembly Components ...........................................22
Parts Listing..........................................................23
5.0 Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

NOTICE
WARNING
!
!
CAUTION
!
WARNING
!
!
WARNING
!
!
IHR Series Manual
2 3
Safety Symbols
Safety is the most important consideration during installation, operation, and maintenance of the infrared
heater. You will see the following symbols and signal words when there is a hazard related to safety or
property damage.
Improper installation, adjustment, alteration, service, or maintenance can cause property
damage, serious injury, or death. Read and understand the installation, operating, and
maintenance instructions thoroughly before installing or servicing this equipment. Only
trained, qualified gas installation and service personnel may install or service this
equipment.
1.0 Safety •Safety Symbols •Applications
Applications
This is not an explosion proof heater. Consult your local fire marshal, insurance carrier, and other authorities
for approval of the proposed installation.
Commercial / Industrial (Indoor Use Only)
Infrared heaters are designed and certified for use in industrial and commercial buildings such as warehouses,
manufacturing plants, aircraft hangars, and vehicle maintenance shops. For maximum safety, the building
must be evaluated for potential hazards before installing the heater system. A critical safety factor to consider
before installation is the clearance to combustibles.
Not For Residential Use.
Installation of an infrared heater system in residential indoor spaces, RV’s,
mobile homes, etc. may result in property damage, asphyxiation, fire, serious
injury, or death.
Residential
This heater is NOT approved for use in any residential application. This includes, but not limited to, attached
garages, living quarters, solariums, etc. Consult the local fire marshal and/or insurance provider if unsure
of your application.
1.0 Safety
Warning indicates a potentially hazardous situation
which, if not avoided, could result in death or injury.
Caution indicates a potentially hazardous situation
which, if not avoided, could result in minor or
moderate injury.
Notice indicates a potentially hazardous situation
which, if not avoided, could result in property
damage.

CAUTION
!
IHR Series Manual
4
1.0 Safety •Clearance to Combustibles
Clearance to Combustibles
Combustible Items Include: Moving Objects Include:
• Wood • Overhead doors
• Paper • Vehicles on lifts
• Fabric • Cranes
• Chemicals • Hoists
• Wall or roof insulation • Car wash equipment
The stated clearance to combustibles represents a surface temperature of 90°F (50°C) above room
temperature. Building materials with a 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.
When installing the infrared heater system, the minimum clearances to combustibles must be maintained.
These distances are shown in Chart 1.1 and on the heater. If you are unsure of the potential hazards, consult
your local fire marshal, fire insurance carrier, or other qualified authorities on the installation of gas fired
infrared heaters for approval of the proposed installation.
Hazards Include:
For maximum safety the building must be evaluated for hazards before installing the heater system.
Examples include, but are not limited to:
• Gas and electrical lines
• Combustible and explosive materials
• Chemical storage areas
• Areas of high chemical fume concentrations
• Provisions for accessibility to the heater
• Adequate clearances around air openings
• Combustion and ventilating air supply
A critical safety factor to consider before installation is the clearances to combustibles. Clearance to
combustibles is defined as the minimum distance you must have between the infrared surface, or reflector,
and the combustible item. Considerations must also be made for moving objects around the infrared heater.
The following is a partial list of items to maintain clearances from:
WARNING
!
Signs shall be posted specifying the maximum permissible stacking height in order to
maintain clearances to combustibles.
• Vehicle parking areas
• Vehicles with lifts or cranes
• Storage areas with stacked materials
• Lights
• Sprinkler heads
• Overhead doors and tracks
• Dirty, contaminated environment
Placement of explosive objects, flammable objects, liquids,
and vapors close to the heater may result in explosion, fire,
property damage, serious injury, or death. Do not store, or use,
explosive objects, liquids, and vapor in the vicinity of the
heater.
Failure to comply with the published clearances to combustibles could result in personal injury, death,
and/or property damage.

20° - 35°
Below
Top
Front
Back
Manifold or
Control End
SideSide
IHR Series Manual
4 5
1.0 Safety •Clearance to Combustibles
Chart 1.1 • Clearance to Combustibles in Inches (see Figure 1.1)
Model No. Sides Back Top Below/Front
IHR 30 30 18 28 72
IHR 60 32 18 40 72*
IHR 90 48 30 42 98
IHR 130 48 30 52 120
IHR 160 50 32 60 132
* This clearance is 80 in. when the heater is fitted with a parabolic reflector.
NOTE: If the heater is mounted beneath a non-combustible surface, a 24 in. minimum top clearance must
be maintained from the top of the heater to prevent overheating the controls.
Figure 1.1 •Clearance to Combustibles
Mount Heater Level
- Side to Side -
FRONT VIEW SIDE VIEW

IHR Series Manual
6
1.0 Safety •Gas Connection •Standards, Certifications and Government Regulations
WARNING
!
To ensure your safety, and comply with the terms of the warranty, all units must be installed in accordance
with these instructions.
Standards, Certifications and Government Regulations
Installation of this infrared heater must comply with all applicable local, state, and national specifications,
regulations and building codes. Contact the local building inspector and/or fire marshal for guidance.
In the absence of local codes, the installation must conform to the latest edition of:
United States: National Fuel Gas Code, ANSI Z223.1 (NFPA 54).
Canada: CAN/CGA B149.1 and .2, Canadian Electrical Code C22.1
Copies of these standards can be viewed or purchased at www.nfpa.org or www.scc.ca.
Chart 1.2 • Standards and Code Installation Guidelines •Building Aspect
An approved connector, suitable for the environment of equipment usage, is required.
Visible or excessive swaying, flexing, and vibration of the gas connections must be avoided
to prevent failure. Neither the gas pipe nor the connector shall be placed in the ‘flue
discharge area’. In no case shall the gas supply support the weight of the heater.
Gas Connection
Building
Aspect Codes and Guidelines
Electrical
The heater must be electrically grounded in accordance with the following codes:
United States: Refer to National Electrical Code®, ANSI/NFPA 70 (latest edition).
Wiring must conform to the latest edition of National Electrical Code®, local
ordinances, and any special diagrams furnished.
Canada: Refer to Canadian Electrical Code CSA C22.1 Part 1 (latest edition).
Venting
Venting must comply with the requirements within this manual and the following
codes:
United States: Refer to NFPA54/ANSI Z223.1 (latest edition), the National Fuel
Gas Code.
Canada: Refer to CAN/CGA B149.1 Installation Codes for Gas Burning Appliances.

IHR Series Manual
6 7
Applicable authorities governing the manufacturing or installation of this heater include (but are
not limited to) the following organizations:
In the United States:
• NFPA 54/ANSI Z223.1 - National Fuel Gas Code.
• ANSI Z83.19/C2.35 - Gas-fired High Intensity
Infrared Heaters.
• ANSI/NFPA 70 - National Electric Code.
• IRSC.
Chart 1.3 • Standards and Code Installation Guidelines •Building Type
1.0 Safety •Standards, Certifications and Government Regulations
Building
Aspect Codes and Guidelines
Public
Garages
Installation of this infrared heater in public garages must conform to the following
codes:
United States:
Standard for Parking Structures NFPA 88A (latest edition) or the
Code for Motor Fuel Dispensing Facilities and Repair Garages NFPA 30A (latest
edition).
Canada: Refer to CAN/CGA B149.1 and B149.2: Installation Codes for Gas
Burning Appliances.
Guidelines:
• Heaters must not be installed less than 8 ft. (2.4 m) above the floor. Minimum
clearances to combustibles must be maintained from vehicles parked below the
heater.
• When installed over hoists, minimum clearances to combustibles must be
maintained from the upper most point of objects on the hoist.
Aircraft
Hangars
Installation of this infrared heater in aircraft hangars must be in accordance with the
following codes:
United States: Refer to Standard for Aircraft Hangars, ANSI/NFPA 409 (latest
edition).
In Canada:Refer to Standard CAN/CGA B149.1 and B149.2.
Guidelines:
• In aircraft storage and servicing areas, heaters shall be installed at least 10 ft.
(3 m) from above the upper surface of wings or of the engine enclosures of the
highest aircraft that may 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 areas adjoining the aircraft storage area (e.g., shops, offices) the bottom of
heaters shall be installed no less than 8 ft. (2.4 m) above the floor.
• Suspended or elevated heaters shall be located in spaces where they shall not
be subject to damage by aircraft, cranes, movable scaffolding, or other objects.
Provisions shall be made to assure accessibility to suspended infrared heaters for
recurrent maintenance purposes.
In Canada:
• CAN/CGA B149.1-10 - Natural Gas and
Propane Installation Code.
• ANSI Z83.19/C2.35 - Gas-fired High Intensity
Infrared Heaters.
• C22.1 Part 1 - Canadian Electrical Code.

SAMPLE
MODINE MANUFACTURING COMPANY
1500 DEKOVEN AVENUE - RACINE, WI 53403
UNVENTED GAS RADIANT HEATER
FOR INDOOR (Non-Residential) INSTALLATIONONLY.
High - Intensity Infrared Heater
Class IIIA PermanentLabel
262-636-1200 www.modine.com
VOLTS AC:
AMPS - STARTING:
AMPS - RUNNING:
120V - 60Hz
0.1
0.1
DESIGN COMPLIES WITH:
ANSI Z83.19 (latest edition) - Gas Fired High Intensity Infra-Red Heater
HEATER TYPE:
MANIFOLD PRESSURE:
MAX. INLET PRESSURE
C1
10.0 INCHES W.C.
14.0 INCHES W.C.
Serial No. 0807MODI123456001
MODEL NO.
IHR 60S 47
MIN. INLET PRESSURE FOR
PURPOSE OF ADJUSTMENT
MIN. MOUNTING ANGLE
MAX. MOUNTING ANGLE
INPUT BTU/H
60,000
FOR USE WITH
Natural Gas
VERSION
05/97
11.0 INCHES W.C.
20 DEGREES
35 DEGREES
IHR Series Manual
8
Safety Signs and Labels
It is important to provide warnings to alert individuals to potential hazards and safety actions. ANSI Z83.19
and the National Fuel Gas Code require you to post a sign “specifying the maximum permissible stacking
height to maintain the required clearances from the heater to the combustibles” near the heater’s thermostat
or in absence of such thermostats in a conspicuous location. Signs should state the hazards for the
particular application and be legible to the building occupants. Consult the factory or a factory representative
for additional information on signage compliance.
Safety warning labels must be maintained on the
infrared heater. Illustrations of the safety labels,
and their locations, are pictured below.
1.0 Safety •Safety Signs and Labels
Back View
Bottom View
F/N: LLDCL002
Clearance to Combustibles Label
SAMPLE
MODINE MANUFACTURING COMPANY
1500 DEKOVEN AVENUE - RACINE, WI 53403
UNVENTED GAS RADIANT HEATER
FOR INDOOR (Non-Residential) INSTALLATION ONLY.
High - Intensity Infrared Heater
Class IIIA Permanent Label
www.modinehvac.com
VOLTS AC:
AMPS - STARTING:
AMPS - RUNNING:
120V - 60Hz
0.1
0.1
DESIGN COMPLIES WITH:
ANSI Z83.19 (latest edition) - Gas Fired High Intensity Infra-Red Heater
HEATER TYPE:
MANIFOLD PRESSURE:
MAX. INLET PRESSURE
C1
10.0 INCHES W.C.
14.0 INCHES W.C.
Serial No. 0807MODI123456001
MODEL NO.
IHR 60S 47
MIN. INLET PRESSURE FOR
PURPOSE OF ADJUSTMENT
MIN. MOUNTING ANGLE
MAX. MOUNTING ANGLE
INPUT BTU/H
60,000
FOR USE WITH
Natural Gas
VERSION
05/97
11.0 INCHES W.C.
20 DEGREES
35 DEGREES
1.800.828.4328 (HEAT)
Rating Plate
F/N: LLDR002
F/N: LL01 - Clearance
Safety Tag
(Affix adjacent to
heater’s thermostat)
CAUTION
Avoid Equipment Failure
Consult manual for installation guidelines.
Connect proper VO LTAG E as noted on gas valve and heater’s
rating label (25VAC or 120VAC).
Proper POLARITY must be observed. Hot line of electrical
source must be connected to black wire; neutral line to white wire.
For proper operation, green line must connect to POSITIVE
EARTH on all 120VAC heaters.
Observe listed inlet GAS PRESSURES.
Natural Gas: 7 Inches W.C. Min. 14 Inches W.C. Max.
L.P. Gas: 11 Inches W.C. Min. 14 Inches W.C. Max.
Observe 20°-35° MOUNTING ANGLE. DO NOT mount
horizontally. Consult installation manual.
Reference the WIRING DIAGRAM located inside this box.

2.0 Installation
WARNING
!
CAUTION
!
IHR Series Manual
8 9
2.0 Installation •Design
Read and understand, the installation, operating, and maintenance instructions
thoroughly before installing or servicing this equipment.
Only trained, qualified gas installation and service personnel may install or service this
equipment.
Design
To ensure a safe, properly designed heating system, a layout should be developed for the correct placement
of the infrared heater(s). Aside from safety factors such as clearance to combustibles (see Chart 1.1 on
page 5), you should take also into consideration the environment (e.g., cold/drafty, average, protected),
heat coverage (sq. ft.) needed, heater centers, the distance behind a person or work station(s) and exhaust
path. Also, the effective infrared surface temperature of a person or object may be diminished with wind
above 5 mph. Wind barrier(s) may be required. Most importantly, clearance to combustibles must always
be maintained! Refer to hazards on page 4.
This installation manual, along with national, state, provincial, and local codes, address these issues. It is
critical that you read, understand, and follow all guidelines and instructions. Always inspect and evaluate the
mounting conditions, space for exhaust, gas supply and wiring.
Perimeter mounting of infrared heaters provides the most effective distribution of heat. The recommended
spacing between the heaters is shown in Chart 2.1. Add additional heaters in the center of the space when
heaters are spaced farther than the recommended distance (see Figure 2.1 ).
When heated, materials high in hydrocarbons (solvents, paint thinner, mineral spirits, formaldehydes, etc.)
can evaporate. This may result in odors or fumes being emitted into the environment. To correct this problem,
clean the area and/or introduce additional ventilation. Heaters installed and serviced in accordance with the
installation manual do not emit foul odors into the environment.
IMPORTANT: Fire sprinkler heads must be located at an appropriate distance from the heater. This
distance may exceed the published clearance to combustibles. Certain applications will require the use of
high temperature sprinkler heads or relocation of the heaters.
Sprinkler systems containing propylene glycol or other flammable substances are not to be used in
conjunction with this heater without careful consideration for, and avoidance of, potential fire or explosion
hazards. For further information, consult NFPA 13. Always observe applicable state and local codes.
This heater cannot be used in a building with an uninsulated roof or condensation problems can occur.

IHR Series Manual
10
2.0 Installation •Heater Placement
Model No.
Mounting Heights Dim. A Distance
Between
Heaters
Dim. B (ft.)
Distance
Between
Heater Rows
Dim. C (ft.)
Distance
Between
Heater
and Wall (ft.)
30°Angle
Standard
Reflector (ft.)
30°Angle
Parabolic
Reflector (ft.)
IHR 30 12-14 12-15 8-24 15-40 4-8
IHR 60 14-16 18-21 12-36 15-55 6-12
IHR 90 16-18 21-25 16-48 20-70 6 -12
IHR 130 21-24 26-32 20-60 25-85 8-14
IHR 160 24-28 29-35 24-65 30-100 8-14
Chart 2.1 • Recommended Mounting Heights and Distances for “Total Area” Heating
Key
Infrared heater
Exhauster
Thermostat
Air intake louver
A
B
Perimeter mounting
Perimeter and center row mounting
A
B
Factory recommended mounting heights are listed as a guideline. If infrared heaters are mounted too low or
too high, they may result in discomfort or lack of heat. Modine Manufacturing Company generally recommends
observing the recommended mounting heights to optimize comfort conditions. However, certain applications
such as spot heating, freeze protection, outdoor patio heating or very high ceilings may result in the heaters
being mounted outside of the recommended mounting heights.
Figure 2.1 •Total Area Heating Sample Layout
C

IHR Series Manual
10 11
Model
& Input
Type of Area
(Surroundings)
Approx.
Area
Covered
Approx.
Coverage
(sq. ft.)
Recommended
Mounting Height
Stnd. Reflector
(Dim. A)
Distance
Behind
Person or
Work Station
(Dim. B)
Centers for
Full Coverage
(Spot & Area)
Htg. Only
IHR 30
30,000
BTU/h
Cold/Drafty 10’ x 10’ 100 9’ to 10’ 4’ 10’
Average 12’ x 12’ 144 10’ to 12’ 5’ 12’
Protected/Insul. 14’ x 14’ 196 12’ to 14’ 6’ 14’
IHR 60
60,000
BTU/h
Cold/Drafty 16’ x 16’ 256 12’ to 14’ 6’ 16’
Average 18’ x 18’ 324 14’ to 16’ 7’ 18’
Protected/Insul. 20’ x 20’ 400 16’ to 18’ 8’ 20’
IHR 90
90,000
BTU/h
Cold/Drafty 20’ x 20’ 400 16’ to 18’ 9’ 20’
Average 24’ x 24’ 576 18’ to 20’ 10’ 24’
Protected/Insul. 28’ x 28’ 784 20’ to 22’ 11’ 26’
IHR 130
130,000
BTU/h
Cold/Drafty 26’ x 26’ 676 18’ to 20’ 11’ 26’
Average 30’ x 30’ 900 18’ to 20’ 12’ 28’
Protected/Insul. 35’ x 35’ 1225 20’ to 22’ 13’ 32’
IHR 160
160,000
BTU/h
Cold/Drafty 28’ x 28’ 784 20’ to 22’ 12’ 28’
Average 35’ x 35’ 1225 24’ to 26’ 16’ 32’
Protected/Insul. 40’ x 40’ 1600 28’ to 30’ 20’ 35’
Chart 2.2 • Recommended Mounting Heights and Distances for “Spot” Heating
2.0 Installation •Heater Placement
A
B
Figure 2.2 •Spot Heater Heights

Rigid threaded
rod
Control
End Down
SIDE VIEW
20˚ - 35˚
Steel “C”
clamp
Chain
hanging
set
Closed “S” hook
(typical)
SIDE VIEW
Control
End Down
20˚ - 35˚
IHR Series Manual
12
2.0 Installation •Heater Mounting
WARNING
!
Heater Mounting
The heater can be suspended with chains or rigid threaded rod. Local codes or conditions that would cause
the unit to move (e.g., wind drafts, blowers, crane rails, etc.) may require rigid threaded rod. Consult all
applicable codes before installation.
The heater must be level from side to side and between 20° and 35° from horizontal. The pilot burner or
ignitor, manifold, and controls must be located on the lower end. Refer to Figure 2.3.
Figure 2.3 •Heater Mounting and Orientation
Mount Heater Level
Side to Side
Pilot/spark electrode must
be in lower right corner.
(excludes IHR30S)
FRONT VIEW
Improper suspension of the infrared heater may result in collapse and being crushed. Always
suspend from a permanent part of the building structure that can support the total force and
weight of the heater.
Failure to maintain minimum clearance to combustibles may result in fire and/or explosion,
property damage, serious injury, or death. Always maintain minimum clearances and post
signs or provided tags (F/N: LL01) where needed. Signs should state the hazards for the
particular application and be legible to the building occupants. Consult the factory or a
factory representative for additional information on signage compliance.
An approved connector, suitable for the environment of equipment usage, is required.
Visible or excessive swaying, flexing, and vibration of the gas connections must be avoided
to prevent failure. Neither the gas pipe nor the connector shall be placed in the ‘flue
discharge area’. In no case shall the gas supply support the weight of the heater.

IHR Series Manual
12 13
Ventilation
It is required that the levels where heaters are mounted be properly ventilated to supply combustion air to
the heaters and to sufficiently dilute the products of combustion. It is also required that the flue discharge
area is kept clear of gas piping and electrical wiring (see Figure 2.4).
This infrared heater must be vented in accordance with national, state, provincial, and local codes and the
guidelines in this manual. In the United Sates refer to the latest edition of ANSI Z223.1 (NFPA 54) and in
Canada refer to the latest edition of the CAN/CGA B149.1 & B149.2 Standard.
Figure 2.4 •Hot Flue Discharge
Provisions must also be made to provide sufficient fresh air intake area and exhaust air outlet area. For
proper ventilation, a positive air displacement of 4 CFM/1,000 BTU/h of gas consumed mus be provided.
Where insufficient air movement exists, induced air displacement is required. A balanced system is essential
to avoid negative building pressure which causes excessive infiltration, unfavorable drafts, and affects
combustion efficiency.
Air displacement may be accomplished by either natural or mechanical means. Mechanical exhausters are
preferred and typically mounted at high points on the roof where stagnant air accumulates inside the building.
For a flat roof, considerations of prevailing winds, high and low pressure areas, and distribution of air
movement must be taken into consideration when locating exhausters.
Best air distribution is accomplished by using a number of small exhausters versus one large exhauster.
Provide a minimum of one square inch of inlet area per 1,000 BTU/h for combustion air supply. Inlet
opening in the building should be well distributed (see Figure 2.1) high in the sidewalls and should direct
incoming air upward to dilute products of combustion while preventing drafts at lower levels. Inlets are
typically 1 to 3 sq. ft.
Local codes may require that mechanical exhaust systems be interlocked with heaters to enable both to
function simultaneously (see page 17, Figure 2.6) or allow control of exhausters with a ceiling mounted
humidistat.
2.0 Installation • Ventilation
Insufficient ventilation may result in health problems, carbon monoxide
poisoning, or death. Vent enclosed spaces and buildings according to
national, state, provincial, and local codes.
Improper venting may result in asphyxiation, fire, explosion, injury, or death.
WARNING
!
Flue Discharge Area
Important! Do not
install gas piping or
electrical wiring above
the flue discharge
area! Manifold/Control
End Down
SIDE VIEW
20˚ - 35˚

IHR Series Manual
14
2.0 Installation •Gas Supply
Gas Supply
Important! Before connecting the gas supply to the infrared heater(s):
• Check that the gas piping and service has the capacity to handle the load of all heaters being
installed, as well as any other gas appliances being connected to the supply line.
• Check that the main gas supply line is of proper diameter to supply the required fuel pressures.
• If utilizing used pipe, verify that its condition is clean and comparable to a new pipe. Test all gas
supply lines in accordance with local codes.
• Test and confirm that inlet pressures are correct. Refer to the rating plate for required minimum
and maximum pressures (see Chart 2.3). The gas supply pipe must be of sufficient size to
provide the required capacity and inlet pressure to the heater (if necessary, consult the local
gas company).
Chart 2.3 • Manifold Pressure
Pressure Equivalents: 1 inch W.C. equals .058 oz/sq. in. equals 2.49 Mbar.
Note: Check manifold pressure at the tap located either at the outlet of the gas valve or on the gas
manifold pipe. Readings will be above atmospheric pressure during operation.
The gas supply to the infrared heater must be connected and tested in accordance with national, state,
provincial, and local codes along with the guidelines in the Modine Manufacturing Company IHR Series
manual. In the United States refer to the latest edition of the ANSI Z223.1 (NFPA 54) Standard and in
Canada refer to the latest edition of the CAN/CGA B149.2 Standard.
Type of Gas
Required Manifold
Pressure
Minimum
Inlet Pressure
Maximum
Inlet Pressure
Natural 6.0 Inches W.C. 7.0 Inches W.C. 14.0 Inches W.C.
Propane 10.0 Inches W.C. 11.0 Inches W.C. 14.0 Inches W.C.
WARNING
!
Improperly connected gas lines may result in fire, explosion,
poisonous fumes, toxic gases, asphyxiation, or death. Connect
gas lines in accordance to national, state, provincial, and local
codes.

IHR Series Manual
14 15
This heater must be installed and serviced by trained gas installation and service personnel only.
The installation of this heater must conform with local building codes or, in the absence of such codes, the
National Fuel Code (NFPA 54).
The gas outlet must be in the same room as the appliance and accessible. It may not be concealed within
or run through any wall, floor or partition.
1The IHR Series heater is equipped to receive a gas supply line nipple of 1/2” NPT Schedule 40
metallic pipe. All piping must be installed in accordance with the requirements outlined in the National
Fuel Gas Code ANSI/Z223.1 (latest edition) or CSA B149.2. Support all gas supply with pipe hangers,
metal strapping, or other suitable material. Do not rely on the heater to support the gas pipe.
2Form the stainless steel flexible connector (field supplied) into a smooth C-shape allowing 12 in.
between the flexible connector’s end nuts. Figure 2.5 on page 16. NOTE: Not for use on rigidly
mounted heaters.
3Install a ground joint union with a brass seat and a manual shut off valve adjacent to the unit for
emergency shut off and easy servicing of controls. A 1/8” NPT plugged tap that is accessible for a test
gauge connection is also recommended.
4A sediment trap must be installed in the supply line in the lowest spot prior to connecting to the heater.
The trap length shall be at least three inches long. Ideally, the trap would be installed as close as
possible to the shut off.
5When connecting piping to the unit, the use of a thread joint compound is required. The thread
compound (pipe dope) shall be resistant to the action of propane gas or any other chemical
constituents of the gas to be conducted through the piping. Use of Teflon®tape is not permitted.
WARNING
!
!
Always use two (2) opposing wrenches to tighten mating pipe connections
to prevent excessive torque on the gas valve and manifold pipe. Excessive
torque can damage the valve and/or misalign the orifice, resulting in fire,
explosion, serious injury, or death.
To connect the gas:
2.0 Installation •Gas Connection
WARNING
!
Failure to install, operate, or service this appliance in the approved manner may result in
property damage, injury, or death.
An approved connector, suitable for the environment of equipment usage, is required.
Visible or excessive swaying, flexing, and vibration of the gas connections must be
avoided to prevent failure. Neither the gas pipe nor the connector shall be placed in the
‘flue discharge area’. In no case shall the gas supply support the weight of the heater.

IHR Series Manual
16
2.0 Installation •Gas Connection •Leak Testing
Leak Testing
Always leak test final gas assembly for gas leaks according to the procedures outlined in NFPA 54 and all
local codes and/or Standards.
For leak testing on pressures below ½” PSI
Before leak testing, close the field installed manual shut off valve shown on Figure 2.5 on the supply line
to isolate the gas valve from the pressure.
NOTE: All factory installed gas connections have passed an approved leak test.
For leak testing on pressures above ½” PSI
When leak testing with pressures above ½” PSI (14 inches W.C.), the unit must be isolated from the
supply pipe. Close the field installed manual shut off valve, disconnect the supply line to the unit, and
temporarily cap the supply line for testing purposes.
Figure 2.5 •Gas Connection
Drip Leg/
Sediment Trap
NOTE: Use a
regulator when gas
supply pressure
exceeds 14” W.C. Do
not exceed 14” W.C.
to the appliance.
Ball Valve / Inlet Tap
Disconnect switch
Stainless Steel Gas Connector, formed into a smooth C-Shape
(Field Supplied). Not for use with rigidly mounted heaters.
SIDE VIEW
20˚ - 35˚
TOP VIEW
WARNING
!
!
Use a soap solution or equivalent for leak testing. Never test for leak with an open flame.
Failure to comply could result in personal injury, property damage, or death.
WARNING
!
Gas pressures to the appliance controls must never exceed 14 inches W.C. (1/2” PSI).
Supply pressures greater than 14” W.C. can damage the controls, resulting in personal
injury, property damage, or death.

IHR Series Manual
16 17
Electrical Requirements and Wiring Diagrams
All field installed wiring to the unit heater must be must be done in accordance with the national, state,
provincial, local codes, and to the guidelines in this manual. In the United States, refer to the most current
revisions to the Electrical Code ANSI/NFPA 70 and in Canada refer to the most current revisions to the
Canadian Electrical Code CSA C22.1 Part 1. The unit must be electrically grounded according to these
codes. Line polarity must be observed when making field connections.
Before proceeding with electrical connections, ensure that the supply voltage, frequency, phase and
current capacity meet the requirements specified on the rating plate. A dedicated line voltage supply with
properly sized wire should run directly from the main electrical panel to the heater. The power to the unit
must be protected with a circuit breaker appropriate for the load. The unit must be electrically grounded
in accordance with local codes, or in their absence, with the latest edition of the National Electrical Code,
ANSI / NFPA 70 and/or the Canadian Electrical Code CSA C22.1, latest edition.
Control systems are initiated by either 120 VAC, 24 VAC or millivolt energy. The 120 VAC systems can be
used directly from a 120 VAC line. On 24 VAC systems, transformers must be used to supply power of
sufficient VA rating for single or multiple connected installations.
Millivolt systems require NO external power, as energy needed to operate the valve is developed by the
power-pile generator. Do not use multiple connections, as one thermostat may only control one heater.
For wiring of controls on the unit, see the Figure 2.6 below. It is recommended that the thermostat be
installed on the hot side of a fused supply line and have sufficient ampere capacity rating for the heater(s)
it will control. The ventilation system may not be controlled separately from the heating system (consult
local codes) by the use of a humidistat that closes then the humidity rises. The humidistat control should
be installed at roof level. For summer ventilation, a simple on/off switch can be installed at the occupant
level.
Figure 2.6 •Typical Field Wiring
2.0 Installation •Electrical Requirements and Wiring Diagrams
The power supply to the heater must be within +/- 5% of the voltage rating as indicated on the rating
plate of the appliance. If input power does not meet these specifications, contact your utility company.
CAUTION
!
Thermostat
Hot
Neutral
Exhaust
Fan
IHR Series
Heater
Transformer
(required on
24V heaters)
IHR Series
Heater
IHR Series
Heater
WARNING
!
Shock hazard. Disconnect power supply before making wiring connections to prevent
electrical shock and equipment damage. Any original factory wiring that requires replacement
must be replaced with wiring material having a temperature rating of at least 105°C.

L1
ELECTRODE
ASSEMBLY
GAS VALVE
120VAC DSI MODULE
O
W
BK
W
W
BK
BK
G
GG
L2
W
BK
SENSE
NEUTRAL
THERMOSTAT
NEUTRAL
VALVE
GROUND
HIGH
VOLTAGE
W
ELECTRODE
ASSEMBLY
GAS VALVE
24VAC DSI MODULE
O
W
BK
W
BL
G
G G
(COMMON)
N/PFS-2 24VAC
LLWDR002REV. 1
(24VAC)
SENSE
GROUND
NEUTRAL
THERMOSTAT
VALVE HIGH
VOLTAGE
IHR Series Manual
18
2.0 Installation •Wiring Diagrams
Figure 2.7 •Millivolt • 750 Schematic
• Millivolt Control
Figure 2.8 •24V Schematic
• Direct Spark
Ignition
• VA Draw: 12
• Amps: .48
• Potted Circuit
Board
Figure 2.9 •120V Schematic
•Direct Spark
Ignition
•VA Draw: 12
•Amps: .10
• Potted Circuit
Board

IHR Series Manual
18 19
3.0 Operation
3.0 Operation •Lighting Instructions
WARNING
!
Do not attempt to ignite a direct spark ignition heater by hand. Failure to comply could
result in personal injury, property damage, explosion, fire, or death.
Upon satisfactory completion of the electrical supply and purging of the gas supply line to the heater(s),
follow the lighting instructions on the heater’s rating label to put the heater into operation.
Direct Spark Ignition
Lighting Instructions
1Rotate the heater’s valve knob to the “ON” position.
2Close electrical circuit (typically the thermostat).
3If the heater fails to light, turn off gas, open electrical circuit and wait 5 minutes before repeating the
above steps.
Shutdown Instructions
1Open electrical circuit.
2Rotate the heater’s valve knob to the “OFF” position.
Sequence of Operation
Starting Circuit: Upon a call for heat, voltage is applied to L1 and Neutral. After a pre-purge, the spark
electrode is energized and the gas valve opens. The trial for ignition is 15 seconds. If flame is not sensed,
the heater will attempt two more times to reignite.
Running Circuit: After ignition, the sensing electrode monitors the burner flame. If sense of flame is lost,
the control immediately acts to reignite the gas-air mixture. If flame sense is not established within 15
seconds, the heater will attempt two additional ignition sequences before proceeding to hard lockout. The
control can be reset by briefly interrupting the power source.
Millivolt
Lighting Instructions
1Purge main gas supply line.
2Slightly depress and rotate the heater’s manual gas valve knob COUNTERCLOCKWISE from the
“OFF” position to the “PILOT” position.
3Fully depress the manual gas valve knob and light the pilot burner. Continue to depress for 30
seconds and then release.
4Rotate the heater’s valve knob to the “ON” position.
5Close the control circuit. If the heater fails to light, turn off the gas, open control circuit and wait 5
minutes before repeating the above steps.
Shutdown Instructions
1Open the control circuit.
2
Rotate the heater’s valve knob to the “PILOT” position, depress slightly and rotate to the “OFF” position.
Sequence of Operation
Starting Circuit: After manually lighting the pilot (see lighting instructions), upon a call for heat, the main
burner solenoid is energized. The gas valve opens and the pilot lights the main burner.
Running Circuit: After ignition, the powerpile monitors the pilot flame. If the pilot flame is lost, the
powerpile cools and closes the valve within 180 seconds. See lighting instructions to relight the heater.

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20
4.0 Maintenance
4.0 Maintenance •Maintenance Checks
Main Burner
1Gently use an air hose to blow any
accumulated dust and/or dirt off the heater.
Air hose pressure must not exceed 30 psig.
2Gently pass the air hose over the entire
exposed area of the ceramic. A distance of
2’ to 4’ from the unit is recommended.
NOTE: Blowing out the gasket material will
permanently damage the rayhead.
3Gently place the air hose outlet into each
venturi tube and allow the air to flow for
approximately one minute.
4See troubleshooting chart (page 21) if there
are any signs of burner malfunction. Replace
if necessary.
Pilot Burner
1Remove pilot access door.
2Use an air hose and gently blow the pilot
burner free of dust or debris.
Gas Supply
1Periodically inspect the gas supply for signs
of corrosion or failure. Replace if necessary.
WARNING
!
Use protective glasses when cleaning
the heater.
Disconnect power to heater before
servicing.
Do not operate unit if repairs are
necessary. Do not operate unit
showing any signs of burner
malfunction. Call a professional for
assistance.
Avoid Equipment Failure.
Do not blow out heating elements
with high pressure air.
CAUTION
!
It is recommended that the following become a standard yearly procedure to obtain maximum operating
efficiency and trouble free operation.
During long periods of non-usage, remove or cover heater with a polyethylene bag and shut off gas supply.
If further service to the heater is desired, contact your representative or the factory.