!
!
!
!
9-513
October 2016
INSTALLATION AND SERVICE MANUAL
High Intensity Gas Fired Infrared Unit Heaters
Model OHP, Control Codes 48 and 98
INSTRUCTIONS APPLY TO:
Installation Operation 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.
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.
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.
CONTENTS
Section Page
1. Safety ....................................................................3
2. Installation ............................................................. 9
3. Operation ............................................................20
4. Maintenance .......................................................21
5. Parts .................................................................... 26
6. Limited Warranty ................................................. 28
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.
OHP Series
Contents
1.0 Safety....................................................................3
Safety Symbols .......................................................3
Applications ..........................................................3
Clearance to Combustibles ..............................................4
Standards, Certifications and Government Regulations ........................6
Safety Signs and Labels ................................................8
2.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Heater Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Recommended Mounting Heights.........................................11
Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Gas Connection.......................................................14
Leak Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.0 Operation ................................................................20
Sequence of Operation .................................................20
4.0 Maintenance ..............................................................21
Periodic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Service Access Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Maintenance Log ......................................................24
5.0 Parts ....................................................................26
6.0 Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2
!
!
!
!
!
OHP Series
!
!
!
1.0 Safety • Safety Symbols • Applications
1.0 Safety
WARNING
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.
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.
Danger indicates a hazardous situation which, if
DANGER
not avoided, will result in death or serious injury.
Warning indicates a potentially hazardous situation
WARNING
CAUTION
NOTICE
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.
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
This patio heater is specifically designed to provide heated comfort in an outdoor environment. When
properly integrated into a patio design, the heaters generally increase comfort levels.
Outdoor Residential
This heater may only be used in outdoor residential applications and is NOT approved for use in any indoor
residential application. This includes, but is not limited to, attached garages, living quarters, solariums, etc.
Consult the local fire marshal and/or insurance provider if unsure of your application.
WARNING
Not For Indoor Residential Use. Installation of an infrared heater system in
residential indoor spaces may result in property damage, serious injury, or
death. In residential applications this heater may only be used outdoors.
32
1.0 Safety • Clearance to Combustibles
!
!
OHP Series
Clearance to Combustibles
WARNING
Placement of explosive objects, flammable objects, liquids, and/or 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/or 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.
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:
Combustible items: Moving Objects:
• Wood • Chemicals • Overhead doors • Hoists
• Paper • Wall or roof insulation • Vehicle lifts • Car wash equipment
• Fabric • Cranes
Hazards:
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
• Vehicle parking areas
• Vehicles with lifts or cranes
• Storage areas with stacked materials
• Lights
• Sprinkler heads
• Overhead doors and tracks
• Dirty, contaminated environment
CAUTION
In locations used for the storage of combustible materials, signs must be posted to specify
the maximum permissible stacking height to maintain the required clearances from the
heater to the combustibles. Signs must either be posted adjacent to the heater thermostats
or, in the absence of such thermostats, in a conspicuous location.
Children and adults should be alerted to the hazards for high surface temperatures and should stay away
to avoid burns or clothing ignition.
Young children should be carefully supervised when they are in the same space as the heater.
Clothing or other flammable materials should not be hung from the heater, or placed on or near the heater.
Any guard or other protective device removed for servicing the heater must be replaced prior to operating
the heater.
Installation and repair should be done by a qualified service person. The heater should be inspected before
use and at least annually by a qualified service person. More frequent cleaning may be required as
necessary. It is imperative that the control compartment, air passageways, and burner of the heater are kept
clean.
4
OHP Series
1.0 Safety • Clearance to Combustibles
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.
Chart 1.1 • Clearance to Combustibles in Inches (see Figure 1.1)
Mounting
Model No. BTU/h Voltage
OH P 31S 31,000 24 VAC
OHP 34S 34,000 24 VAC
Angle* Sides Back To p Below Ends Front
0° 18 N/A 13 48 12 N/A
30° N/A 18 18 40 12 36
0° 18 N/A 13 48 12 N/A
30° N/A 18 18 40 12 36
* Heaters mounted on an angle between 1° to 30° must maintain clearances posted for 0° or 30°;
whichever is greater.
Important! If the heater is mounted beneath a non-combustible surface, an 8 in. minimum top clearance
must be maintained from the top of the heater to prevent overheating the controls.
Clearance to combustible distances represent a surface temperature of 90°F (50°C) above ambient
temperature. Ensure that building materials with a low heat tolerance (i.e, awnings, fabrics, plastics,
sprinklers, insulation) are protected against degradation. This may require the heater to be mounted at a
distance in excess of the published clearances to combustibles. Contact the factory or the building material
manufacturer for additional information.
Figure 1.1 • Clearance to Combustibles
Top (to ceiling)
Side
Below
END VIEW - 0° MOUNTING ANGLE
Side
Back
END VIEW - 30° MOUNTING ANGLE
Top
(to ceiling)
Front
30˚
Below
End End
SIDE VIEW
54
1.0 Safety • Standards, Certifications and Government Regulations
!
OHP Series
Standards, Certifications and Governmental Regulations
The installation of this 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) before
installing the heater system.
In the absence of local codes, the installation must conform to the latest edition of the National Fuel Code
ANSI Z223.1 (NFPA 54).
Refer to the following standards and codes for application specific guidelines:
Public Garages:
The installation of this heater in public garages must conform with the Standard for Parking Structures,
ANSI/NFPA 88A (latest edition), and must be at least 8 ft. above the floor.
Aircraft Hangars:
The installation of this heater in aircraft hangars must conform with the Standard for Aircraft Hangars, ANSI/
NFPA 409 (latest edition). The heater must be installed at least 10 ft. above the upper wing surfaces and
engine enclosures of the highest aircraft which might be stored in the hangar. In areas adjoining the aircraft
storage area, the heaters must be installed at least 8 ft. above the floor. The heaters must be located in
areas where they will not be subject to damage by aircraft, cranes, moveable scaffolding or other objects.
Gas Connection:
WARNING
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 or in direct contact with infrared rays. In
no case shall the gas supply support or bear weight of the heater.
To ensure your safety, and to comply with the terms of the warranty, all units must be installed in accordance
with these instructions. Under no circumstance should the gas supply line provide support to the heater.
The gas supply to the infrared patio heater must be connected and tested in accordance with national, state,
provincial, and local codes along with the guidelines in the 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
B149.1 Standard.
Supply gas piping to the unit should conform to the local and national requirements for type and volume of
gas handled, and pressure drop allowed in the line. Avoid pipe sizes smaller than 1/2”.
6
OHP Series
1.0 Safety • Standards, Certifications and Government Regulations
Electrical:
The heater, when installed, must be electrically grounded in accordance with the National Electrical Code
ANSI/NFPA 70 (latest edition). Under no circumstances is the electrical supply line to provide any assistance
in the suspension of the heater.
Ventilation:
This heater must be installed in accordance with the requirements set forth in this manual and with the
NFPA 54/ANSI Z223.1 National Fuel Gas Code (latest edition). See ventilation requirements on page 19.
OHP Series units comply or are certified by one or more of the following organizations or standards:
• CSA International Requirement (CSA 2.37).
• American National Standards Institute (ANSI Z83.26).
• Intertek (ETL)
• Occupational Safety and Health Act (OSHA).
• NFPA 54/ANSI Z223.1 - National Fuel Gas Code.
• NFPA 70/ANSI - National Electrical Code.
• IRSC - Infrared Heater Safety.
76
1.0 Safety • Safety Signs and Labels
OHP Series
Safety Signs and Labels
It is important to provide warnings to alert individuals to potential hazards and safety actions. ANSI Z83.26/
CSA 2.37 requires you to post a sign specifying the maximum permissible stacking height to maintain the
required clearances from the heater to the combustibles near the heaters thermostat or in absence of such
thermostats in a conspicuous location.
Safety warning labels must be maintained on the infrared heater. Illustrations of the safety labels and their
locations are pictured below. In locations used for the storage of combustible materials, signs must be
posted to specify the maximum permissible stacking height to maintain the required clearances from the
heater to combustibles. Signs must either be posted adjacent to the heater device or in the absence of such
control in a prominent location.
Figure 1.2 • Heater Safety Label Locations
F/N: LL01 - Clearance Safety Tag
(Affix adjacent to heater’s control
device).
F/N: LLPCL004
Clearance to Combustibles Label
Side Panel
OHP-34S 48
MODINE MANUFACTURING COMPANY
1500 DEKOVEN AVENUE - RACINE, WI 53403
1.800.828.4328 (HEAT) www.modinehvac.com
Rating Label
(inside panel)
F/N: LLDR009 (NG)
F/N: LLDR010 (LP)
Gas Type Label
4002434
LLDR003
Provide 24 Volts
End Panel
F/N: LLOGO029 Logo Sticker
Wiring Diagram (inside panel)
Front Panel
8
!
OHP Series
!
2.0 Installation • Design
2.0 Installation
WARNING
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
OHP Series Patio Heaters are designed specifically for comfort heating in an outdoor environment. Examples
of suitable applications include patios, porches, outdoor shopping areas, and outdoor pathways. When used
properly, the heaters will increase the comfort levels of its application. However, the effectiveness of the
heating will depend on many variables such as air temperature, wind velocity, wind barriers, mounting
heights, and distance between heaters. To ensure a safe, properly designed heating system, all of these
variables should be considered prior to developing a layout for the infrared heaters.
It is important to note that the effectiveness of the heater may be diminished in environments with wind
velocities above 5 MPH. Wind barriers can be extremely effective in maintaining the effectiveness of the
heater and reducing the operational costs. However, if wind barriers are used, they must be designed in
such a way that allows for the necessary fresh air and ventilation for the proper heater operation. In addition,
all clearance to combustibles must be maintained at all times (See Chart 1.1 on page 5).
NOTICE
Radiant heat is capable of damaging or destroying certain materials or items. Do not store materials or
items underneath the heater. Always maintain clearance to combustibles.
The infrared patio heaters may be laid out in a number of configurations depending on the structures
constraints of the application, heating requirements and, therefore, the basic recommendations of installation.
The minimum mounting height for all OHP Series Patio Heaters is 6.5 feet above the finished floor.
The heater must always be operated in a location that allows uniform air pressure around the heater. If one
part of the heater is located outside of a wind protected zone, the heater may not properly function or
damage to the heater may occur. Consideration should be taken on how the wind will affect the heaters after
installation. IMPORTANT: Fire sprinkler heads must be located at an appropriate distance from the heater
to avoid accidental discharge of the fire suppression system. This distance may exceed the published
clearance to combustibles (see Chart 1.1 on pg. 5). Certain applications will require the use of high
temperature sprinkler heads or relocation of the heaters.
CAUTION
Fire sprinkler systems containing propylene glycol, antifreeze, or other potentially flammable substances
shall not be used in conjunction with this heater without careful consideration for, and avoidance of,
inadvertent discharge hazards. For further information, consult NFPA 13. Always observe applicable
state and local codes.
98
2.0 Installation • Heater Mounting • Optional Mounting Kit
!
OHP Series
Heater Mounting
WARNING
Improper suspension of the infrared heater may result in collapse and persons 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 for the building occupants. Consult the factory or a
factory representative for additional information on signage compliance.
The heater shall be mounted in a fixed position attached from a structure that can evenly support the total
force and weight of the heater. The mounting means shall be independent of the gas and electrical supply
line. All hangars and bracket material shall be of noncombustible construction. Examples of suitable material
include, but are not limited to, steel channel, steel tubing, threaded rod, or field fabricated hangers that are
adequate to bear the load. In some cases, the heater may need to be isolated from vibration with the use of
vibration isolating devices.
The heater must be level from side to side and can be set at an angle between 0° and 30° from horizontal.
Figure 2.1 • Heater Dimensions
2.75”
10.875”
48.375”
9”
9”
END VIEWSIDE VIEW
Optional Mounting Kit
Optional adjustable mounting kits and brackets are available for the Patio Heater. Refer to the insert that
was packaged with the mounting brackets for complete installation instructions.
10
OHP Series
!
!
2.0 Installation • Heater Mounting • Recommended Mounting Heights
Recommended Mounting Heights
WARNING
WARNING
Heater must be installed at least 6.5 feet above the finished floor.
Chart 2.1
NOTE: This chart is provided as a guideline. Actual conditions dictate variances from this data.
Figure 2.2 • Heater Orientation
• Recommended Mounting Heights
Recommended
BTU/h
31,000 8’-0” to 12’-0” 8’ x 8’ 64 sq. ft.
34,000 8’-6” to 13’-0” 9’ x 9’ 81 sq. ft.
Optional
Mounting
Bracket
Mounting Height
End End
Approximate
Coverage Area
Approx. Coverage
(sq. ft.)
0-30°
Level end to end
1110
2.0 Installation • Heater Mounting
OHP Series
Figure 2.3 shows different types of mounting configurations. Depending on the type of mounting you use,
be sure to:
1 Prepare mounting surface. If necessary, weld blocks to mounting structure, drill holes, etc.
2 Fasten beam clamp, screw hook, or other type of suspension anchor to hanging point.
3 Attach threaded rod and turnbuckle to anchor. Check that it is securely attached.
4 Attach heater to turnbuckle. Adjust turnbuckle until the heater is level and equal weight distribution is
achieved. Threaded rod must be straight up and down. Do not install threaded rod at an angle.
Figure 2.3 • Heater Mounting
Optional
Mounting bracket
attached to ceiling.
Optional Mounting
bracket attached to
wall.
30° Mounting Angle
30°
0°
Mounting Angle
30°
30°
Mounting Angle
0° Mounting Angle
Bar Joist Clip
Rigid threaded rod
and turnbuckle
(field supplied)
12
OHP Series
!
2.0 Installation • Gas Supply
Gas Supply
The gas supply to the infrared patio heater must be connected and tested in accordance with national, state,
provincial, and local codes along with the guidelines in the 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
B149.1 Standard.
WARNING
Improperly connected gas lines may result in fire, explosion,
poisonous fumes, toxic gases, asphyxiation, and/or death.
Connect gas lines in accordance to national, state, provincial,
and local codes.
Supply gas piping to the unit should conform to the local and national requirements for type and volume of
gas handled and pressure drop allowed in the line. Avoid pipe sizes smaller than 1/2”.
NOTICE
The total input to the appliance must fall within +/- 5% of the rated input as indicated on the rating plate.
Otherwise the burner may prematurely fail.
IMPORTANT! Before connecting the gas supply to the heater:
• Verify that the heater’s gas type (as listed on the rating plate) matches that of your application and the
installation complies with national and local codes and requirements of the local gas company.
• Unless otherwise noted on the rating plate, the infrared heater is designed and orificed to operate on
standard BTU gas. Contact the factory if utilizing non-standard BTU gas.
• Check that the gas piping and service has the capacity to handle the total gas consumption of all the
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.
The gas outlet must be in the same space as the appliance installation, and must be accessible. It may not
be concealed within or run through any wall, floor, or partition. When installing the heater in a corrosive
environment or near corrosive substances, use a gas connector suitable for the environment. Do not use
the gas piping to electrically ground the heater.
This heater is equipped to connect to ½” NPT gas 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 B149.1 and B149.2.
Support all gas piping with pipe hangers, metal strapping, or other suitable material. Do not rely on the
heater to support the gas pipe.
1312
2.0 Installation • Gas Supply • Gas Connection
!
!
!
!
When connecting gas 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 liquefied petroleum gas or any other chemical constituents of
the gas to be conducted through the piping. Use of Teflon® tape is not permitted.
Install 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 the controls. A 1/8” NPT plugged tap that is accessible for a test gauge
connection is also recommended as illustrated in Figures 2.4 and 2.5.
A 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 will be installed as close as possible to the
shut-off.
OHP Series
Chart 2.2
Model No. Input
OHP 31S 48
OHP 31S 98
OHP 34S 48
Pressure Equivalents: 1 inch W.C. equals .058 oz./sq. in. equals 2.49 Mbar.
• Gas Consumption and Manifold Pressure (Inches W.C.)
Minimum
Manifold
Pressure
31,000 6.0” W.C. 7. 0” W. C. 14.0” W.C. 29.5 0.43 2.35 mm
31,000 10.0” W.C. 11.0 ” W.C . 14.0” W.C. 12.4 0.34 1.65 m m
34,000 6.0” W.C. 7. 0 ” W.C. 14.0 ” W.C. 32.4 0.47 41 D M S
Inlet
Pressure
Maximum
Inlet
Pressure
Gas
Consumption
(CFH)
To connect the gas:
WARNING
Improperly connected gas lines may result in serious injury or death, explosion, poisonous
fumes, toxic gases, and asphyxiation. Connect gas lines in accordance to national, state,
provincial, and local codes.
Gallons per
Hour
Orifice
Size
WARNING
Conditions such as wind drafts or other variables can cause movement of the heater and
may require it to be rigidly mounted. Avoid excessive movement and/or vibration of the
gas connection by rigidly mounting the heater.
14
OHP Series
!
!
2.0 Installation • Gas Supply • Gas Connection
Figure 2.4 • Gas Connection - End View (shown installed from above)
NOTE: Do not exceed 14 inches W.C. to the
appliance. Use a regulator when gas supply
pressure exceeds 14 inches W.C.
Tee
Shut off valve /
inlet tap
(field supplied)
Ground
joint union
Drip leg / Sediment trap
(field supplied)
Elbow
Figure 2.5 • Gas Connection - End View (shown installed from below)
Elbow
Ground
joint union
Elbow
Shut off valve/
inlet tap
(field supplied)
To disconnect the gas:
1
Disconnect the power to the heater.
2 Turn off the gas supply to the heater and ”bleed” the gas line.
3 Using two wrenches, slowly loosen the fittings. Excessive torque on the manifold may misalign the
orifice.
4 Inspect the gas pipe. Replace if necessary.
5 Always cap off and leak check any open gas lines that are not in use.
Failure to disconnect the electricity to the heater before disconnecting the gas supply may
result in explosion, fire, property damage, injury, or death.
WARNING
1514
2.0 Installation • Gas Supply • Leak Testing
!
!
!
!
!
!
OHP Series
Leak Testing
Use a soap solution or equivalent for leak testing. Leak testing solution must be non-corrosive, and be
rinsed off immediately after the leak test. Never test for leaks with an open flame. Failure to comply could
result in personal injury, property damage, or death.
Always leak test the final gas assembly for gas leaks according to the procedures outlined in NFPA 54 and
all local codes/or standards.
WARNING
Failure to install, operate, or service this appliance in the approved manner may result in
property damage, injury, or death. This heater must be installed and serviced by trained
gas installations 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).
WARNING
Testing for gas leaks with an open flame or other sources of ignition may lead to a fire or
explosion and cause serious injury or death. Test in accordance with NFPA or local codes.
For leak testing on pressures below ½ PSI
Before leak testing, close the field installed manual shut off valve shown in Figures 2.4 and 2.5 (pg. 15) 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’s gas controls must be isolated from
the supply pipe. Close the field installed manuals shut off valve, disconnect the supply line to the unit, and
temporarily cap the supply line for testing purposes.
WARNING
Gas pressures to the appliance controls must never exceed 14 inches W.C. (1/2 PSI).
Supply pressures greater than 14 inches W.C. can damage the controls, resulting in
personal injury, property damage, or death.
16
OHP Series
!
2.0 Installation • Electrical Requirements
Electrical Requirements
WARNING
Incorrect or improper wiring may result in shock, injury, or death. Field wiring to the heater
must be connected and grounded in accordance with national, state, provincial and local
codes, and to the guidelines in this manual. Refer to the most current revisions to the ANSI/
NFPA 70 Standard.
All field wiring to the patio heater must be done in accordance with the national, state, provincial and local
codes, and 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 of the Canadian Electrical
Code CSA C22.1 Part 1. The unit must be electrically grounded according to these codes.
NOTICE
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.
This patio heater system is designed to operate on an external 24VAC electrical system. Provide only
24VAC with a NEC Class 2 transformer to the control wires inside the controls compartment. Use at least
18 AWG solid core thermostat type wire that has an adequate capacity and temperature rating for the total
load. Never locate the transformer inside the controls compartment.
Installing the control wire
Each heater includes a rubber grommet to allow
for control wire to be brought into the unit with a
water resistant seal. Feed the control wire through
the grommet, piercing the rubber with the wire.
Ensure enough wire length is available to make
the proper connections. Tie the control wire into
a loose knot, as shown in Figure 2.6. Ensure knot
is loose enough to not cause any damage to the
wire. This will allow for a strain relief for the
connections to the heater.
Wiring: From the control wire, connect the
24VAC to the blue wire (labeled “24VAC”) inside
the control compartment. Then connect the
Common from the control wire to the green wire
(labeled “Common”). See Fig 2.8 on page 18.
Figure 2.6 • Control Wire Installation
Loose Knot in
Control Wire
Control Wire
Connections
Controls Operation
This patio heater was designed for use in an outdoor environment. Therefore, controlling the heater by use
of a thermostat may not be the best means of temperature control. In an outdoor application, the air
temperature may not increase and never satisfy the thermostat. The preferred control device when operating
this heater in an outdoor area is a switching or timer device.
In an application where there are several wind breaks or a partially enclosed area, a thermostat can be
used.
1716
3.0 Maintenance • Wiring Diagrams
Figure 2.7 • Internal Wiring Diagram
OHP Series
SENSE
GROUND
VALVE -
THERMOSTAT
VALVE +
IGNITION
MODULE
SPARK
Figure 2.8 • Field Wiring Diagram
Starting Amp Draw: 0.65 Amp
Running Amp Draw: 0.48 Amp
Field Wiring:
1 24 VAC/20VA transformer (.8 Amp) per heater is required (supplied by installer).
2 Maintain electrical polarity when hooking up multiple heaters.
3 Allow heaters to be switched by zones for heating flexibility.
4 Do not attempt to install transformer inside of heater.
18
OHP Series
!
2.0 Installation • Ventilation
Ventilation
WARNING
Improper or insufficient ventilation may result in explosion, fire, health problems,
carbon monoxide poisoning, or death. Vent enclosed spaces and buildings
according to national, state, provincial, and local codes.
This infrared heater must be vented in accordance with national, state, provincial and local codes, and the
guidelines in this manual. Refer to the latest edition of the ANSI Z223.1 (NFPA 54) Standard.
It is required that the upper levels of the space to be heated are properly ventilated to supply combustion air
to the heaters and to sufficiently dilute the products of combustion. It is also important to keep the flue
discharge area clear of gas piping and electrical wiring (see Figure 2.9).
Provisions must also be made to provide sufficient fresh air intake area and exhaust air outlet area. Natural
or mechanical means shall be provided to supply and exhaust at least 4 CFM/1,000 BTU/h of total gas input
of heaters installed. Exhaust openings for the removal of flue products must be above the level of the
heater(s).
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 gravity or mechanical means. Mechanical exhausters are
preferred and typically mounted at high points on the roof over where stagnant air accumulates inside. 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, located high on the wall 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.
In certain applications, local codes may require that mechanical exhaust systems be interlocked with the
heaters to enable both to function simultaneously or allow control of exhausters with a ceiling mounted
humidistat.
Figure 2.9 • Hot Flue Discharge
Discharge released from side
air channels. Keep area clear of
gas piping and electrical wiring.
1918
3.0 Operation • Sequence of Operation
!
OHP Series
3.0 Operation
WARNING
Improper operation of the heater may result in explosion, fire,
shock, and carbon monoxide poisoning. Follow all guidelines
and warnings in this manual and national, state, provincial, and
local codes. Always conduct safety checks before operating the
heater. Do not operate the heater in unsafe conditions.
Important! Before operating the heater, conduct the following safety procedures:
• Check for any possible gas leaks.
• Alert all persons about the hazards of high surface temperatures and to keep a safe distance away in
order to avoid burns and possible clothing ignition.
• Provide supervision when young children are in the area of the heater.
• Check to make sure clothing isn’t hung from the heater and that flammable materials are not
placed on or near the heater.
• Check that all guards or protective devices are in place and secure.
• Check control compartment, burners, and circulating air passages for debris. If necessary, clean the
debris.
Sequence of Operation
Starting Circuit:
When voltage is applied to the controls connection, the ignition module sends power to the gas valve while
simultaneously sending spark to the igniter. The ignition time is 15 seconds. Once the flame on the burner
is established, the ignition module will continuously monitor the flame. The heater will continue to run as long
as there is 24 VAC present in the call for heat. If the heater does not light on the first trial, the heater will
attempt two more ignitions prior to going into a lockout mode.
Running Circuit:
After ignition, the flame rod monitors the flame. As long as a flame is present, the valve is held open. If the
flame is lost, the control acts to close the valve within one second, and a new trial sequence identical to that
at start-up is initiated. If proof of flame is not established within the 15 second trial for ignition, the unit will
retry two additional times before entering lockout mode. If lockout occurs, the control can be reset by briefly
interrupting the power source.
20
OHP Series
!
4.0 Maintenance
4.0 Maintenance
WARNING
Always wear clothing that protects the body and use protective
glasses when servicing the heater.
Electrical shock or explosion may occur when conducting
maintenance while the heater is connected to the power source
and gas supply. Disconnect power and gas supply to heater before servicing.
Burner malfunction may result in explosion or fire. Never operate the heater if there are any signs of
malfunction, excessive wear, or damage. Call a professional for assistance.
Before each use:
• Check the gas supply line for any possible leaks or damage.
• Check heater elements for debris. Visually check burner flames.
• Keep the heated area clear and free of combustible materials, gasoline and flammable vapors and
liquids. Ensure there is no obstruction of the flow of combustion and ventilation.
Periodic maintenance:
• Clean the heater with cleaning agents suitable for the unit’s construction material (i.e., stainless
steel cleaner).
• Inspect the gas supply piping system for signs of corrosion or failure. Replace if necessary.
Before conducting maintenance on the heater disconnect the power and gas supply. When pressure
testing the gas supply piping system follow these guidelines:
• At a test pressure in excess of 1/2 psi (3.5 kPa) the heater and ball shutoff valve must be
disconnected from the gas supply piping system during any pressure testing of the system.
• At a test pressure equal to or less than 1/2 psi (3.5 kPa) the heater must be isolated from the gas
supply piping system by closing its individual manual shutoff valve during any pressure testing of the
gas supply piping system.
Cleaning the main burner:
NOTICE
Cleaning the heater elements with high pressure air may cause damage to the elements and equipment
failure. Do not blow out heating elements with high pressure air.
1
Use an air hose to blow any accumulated dust and/or dirt off the heater. Air hose pressure
should not exceed 30 psi.
2 Pass the air hose over the entire exposed area of the ceramic. A distance of 2’ to 4’ from the unit is
recommended.
3 Place the air hose outlet into the venturi tube and allow the air to flow for approximately one minute.
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.
2120
!
4.0 Maintenance • Service Access Panel Removal
OHP Series
Service Access Panel Removal
Before removing the service access panel on appliance, allow the unit to cool completely before servicing.
To remove the service access panel a ¼” nut driver will be needed.
1 Remove the two ¼” screws on the control end of the unit first while holding the panel in place (see
Figure 4.1).
2 Proceed to the opposite side of the unit while holding the panel in place and remove the last two ¼”
screws.
3 Slowly allow the face to rotate open towards the component side of unit and remove service access
panel.
Failure to support the service access panel during removal can result in damage to the piece and or
uncontrolled dropping of the panel possibly causing injury.
WARNING
Modine Manufacturing Company makes every possible effort to remove sharp edges,
however, caution should be taken to avoid contact with potentially sharp edges on the heater
housing. Sharp edges may cut, resulting in personal injury.
Figure 4.1 • Service Access Panel Removal
Control End
1/4” Screw
1/4” Screw
Service
Access Panel
1/4” Screw
1/4” Screw
22
OHP Series
Chart 4.1 • Troubleshooting Guide
Symptom Possible Cause Corrective Action
Burning of gas-air mixture
inside plenum (flashback).
Rumbling noise present.
Delayed ignition. • Electrode out of specification.
Low ceramic surface
temperature or excessive
rollout.
Control system overheating. • Heater not mounted correctly.
• Heater mounted at incorrect angle.
• Excessive drafts.
• Gas leaking at orifice.
• Separation of ceramic grids.
• Ceramic grids cracked.
• Low gas pressure.
• Partially blocked orifice.
• Improper orifice size.
• Incorrect gas.
• Dirty or plugged burner ceramics.
• Partially blocked orifice.
• Low inlet gas pressure.
• High or low manifold gas pressure.
• Foreign matter in venturi tube.
• Excessive dark spots on burner.
• Gas supply piping too small.
• Incorrect gas.
• Heater mounted too close to
ceiling.
4.0 Maintenance • Troubleshooting Guide
• Mount at a 0˚- 30˚angle from horizontal.
• Relocate heater or shield from draft.
• Check with leak detector solution.
• Replace burner.
• Replace burner.
• Adjust or replace.
• See Section 2.0, Gas Supply.
• Clean or replace gas orifice.
• Consult distributor.
• See unit rating plate.
• See periodic maintenance instructions.
• Remove and clean.
• See Section 2.0, Gas Supply.
• Adjust main valve regulator as specified.
• See periodic maintenance instructions.
• See periodic maintenance instructions.
• Increase inlet pressure or replace piping.
• See unit nameplate.
• Mounting angle 0°- 30°. Level left to right.
• Observe clearance to combustibles.
Gas odor. • Loose pipe connection. • Check connections. Tighten as necessary.
Heater cycles repeatedly. • Heater located in drafty area.
• Low gas pressure.
• Thermostat located in drafty area.
• Defective flame electrode or circuit
board.
No spark; no ignition. • Lack of 24V incoming voltage.
• Open high voltage wire.
• Improper electrode gap.
• Loose or open wire connection.
• Poor or no equipment ground.
• Unit in “safety lockout” mode.
• Defective control module.
Heater lights, and “locks
out” after approximately 10
seconds.
Spark is present. No main
gas operation. Unit “locks
ou t ”.
Heater will not shut off. • Defective thermostat or wiring.
• Poor or no equipment ground.
• Polarity is reversed.
• Low gas pressure.
• Electrode not sensing.
• Heater mounted at incorrect angle.
• Defective control module.
• Gas valve in “OFF” position.
• Defective gas valve.
• Defective control module.
• Gas valve stuck or open.
• High gas pressure.
• Relocate or shield from draft.
• See Section 2.0, Gas Supply.
• Relocate thermostat.
• Replace electrode and/or circuit board.
• Check power supply.
• Isolate and check resistance, replace if
open.
• See Ignition System specifications.
• Check all wires, tighten or replace.
• Check all connections, provide positive
earth ground.
• Interrupt power source, repeat trial
for ignition.
• Replace circuit board.
• Check all connections, provide positive
earth ground.
• Correct wiring.
• See Section 2.0, Gas Supply.
• Relocate or replace if electrode is defective.
• Mounting angle 0˚- 30˚.
• Replace circuit board.
• Turn to “ON” position.
• Isolate and check for resistance, replace
if reading open.
• Replace circuit board.
• Replace thermostat or repair wiring.
• Replace gas valve.
• See Section 2.0, Gas Supply.
2322
4.0 Maintenance • Maintenance Log
OHP Series
Maintenance Log
Date Maintenance Performed Replacement Parts Required
24
OHP Series
Notes
4.0 Maintenance • Notes
2524
5.0 Parts • Heater Components
5.0 Parts
Figure 5.1 • Heater Components
78764, 78765
78 747
78750
78729
OHP Series
78 741
78764, 78765
78 74 3
78 74 2
78757
78754
78755
78735
78756
78737
78738
78760
78758
78 74 6
78 74 4,
78 74 5
78739
78752
78761
78751
78 74 9
78763
78734
78 74 8
78732
78763
78728
78731
78730
78736
78753
78762
78759
78 74 0
78733
26
OHP Series
Chart 5.1 • Parts List
Part No. Description
1
78728
1
78729
1
78730
1
78731
1
78732
78733 Egg Crate
78734 Egg Crate Locator
78735 Egg Crate Access Bracket
78736 Reflector
78737 Venturi Gasket Holder
78738 Venturi Gasket
78739 Insulation
78740 5/16”-18 x 3/4” S.S. Hex Head Screw
78741 1/4” x 1/2” Shoulder Sheet Metal Screw
78742 In-Line Fuse
78743 Thermostat Wire Grommet
78744 Gas Valve (Natural Gas)
78745 Gas Valve (Propane)
78746 3” Gas Pipe
78747 4” Gas Pipe
78748 Gas Orifice (Specify Model)
78749 Coupler (Natural Gas Only)
78750 Rubber Inlet Grommet
78751 1/2” to 1/8” NPT Adapter
78752 Air Metering Washer (Natural Gas Only)
78753 Electrode
78754 Circuit Board
78755 Circuit Board Wiring Harness
78756 Component Panel
78757 High Voltage Wire w/ Boot
78758 Thermal Fuse
78759 Burner Assembly
78760 Divider Panel
78761 Reflector End - Ignition Side
78762 Reflector End - Burner Support w/ Nutsert
1
78763
78764 Wall Mounting Bracket Assembly (Black) Qty. 2 (Optional)
78765 Wall Mounting Bracket (Stainless Steel) Qty. 2 (Optional)
1
Specify [B] Black or [S] Stainless Steel finish.
Exterior Casing
Control End Panel - A
Service Access Panel
End Panel
Rain Guard
Hanging Bracket Qty. 2
5.0 Parts • Parts List
2726
5.0 Limited Warranty
Seller warrants its products to be free from defects in material and
workmanship, EXCLUSIVE, HOWEVER, of failures attributable to the use
of materials substituted under emergency conditions for materials normally
employed. This warranty covers replacement of any parts furnished from
the factory of Seller, but does not cover labor of any kind and materials not
furnished by Seller, or any charges for any such labor or materials, whether
such labor, materials, or charges thereon are due to replacement of parts,
adjustments, repairs, or any other work done. This warranty does not
apply to any equipment which shall have been repaired or altered outside
the factory of Seller in any way so as, in the judgement of Seller, to affect its
stability, nor which has been subjected to misuse, negligence, or operating
conditions in excess of those for which such equipment was designed.
This warranty does not cover the effects of physical or chemical properties
of water or steam or other liquids or gases used in the equipment.
BUYER AGREES THAT SELLER’S WARRANTY OF ITS PRODUCTS
TO BE FREE FROM DEFECT IN MATERIAL AND WORKMANSHIP,
AS LIMITED HEREIN, SHALL BE IN LIEU OF AN EXCLUSIVE
OF ALL OTHER WARRANTIES, EITHER EXPRESS OR IMPLIED,
WHETHER ARISING FROM LAW, COURSE OF DEALING, USAGE OF
TRADE, OR OTHERWISE, THERE ARE NO OTHER WARRANTIES,
INCLUDING WARRANTY OF MERCHANTABILITY OR FITNESS FOR
PURPOSE, WHICH EXTEND BEYOND THE PRODUCT DESCRIPTION
CONFIRMED BY BUYER AND SELLER AS OF THE DATE OF FINAL
AGREEMENT.
This warranty is void if the input to the product exceeds the rated input
as indicated on the product serial plate by more than 5% on gas-fired
and oil-fired units, or if the product, in the judgement of the SELLER, has
been installed in a corrosive atmosphere, or subjected to corrosive fluids
or gases, been subjected to misuse, negligence, accident, excessive
thermal shock, excessive humidity, physical damage, impact, abrasion,
unauthorized alterations, or operation contrary to SELLER’S printed
instructions, or if the serial number has been altered, defaced, or removed.
BUYER AGREES THAT IN NO EVENT WILL SELLER BE LIABLE FOR
COSTS OF PROCESSING, LOST PROFITS, INJURY TO GOODWILL,
OR ANY OTHER CONSEQUENTIAL OR INCIDENTAL DAMAGES
OF ANY KIND RESULTING FROM THE ORDER OR USE OF ITS
PRODUCT, WHETHER ARISING FROM BREACH OF WARRANTY,
NONCONFORMITY TO ORDERED SPECIFICATIONS, DELAY IN
DELIVERY, OR ANY LOSS SUSTAINED BY THE BUYER.
BUYER’S REMEDY FOR BREATCH OR WARRANTY, EXCLUSIVE
OF ALL OTHER REMEDIES PROVIDED BY LAW, IS LIMITED TO
REPAIR OR REPLACEMENT AT THE FACTORY OF SELLER, ANY
COMPONENT WHICH SHALL, WITHIN THE APPLICABLE WARRANTY
PERIOD DEFINED HEREIN AND UPON PRIOR WRITTEN APPROVAL,
BE RETURNED TO SELLER WITH TRANSPORTATION CHARGES
PREPAID AND WHICH THE EXAMINATION OF SELLER DISCLOSE
TO HAVE BEEN DEFECTIVE; EXCEPT THAT WHEN THE PRODUCT IS
TO BE USED BY BUYER AS A COMPONENT PART OF EQUIPMENT
MANUFACTURED BY BUYER, BUYER’S REMEDY FOR BREACH, AS
LIMITED HEREIN, SHALL BE LIMITED TO ONE YEAR FROM DATE OF
SHIPMENT FROM SELLER, FOR GAS-FIRED PRODUCTS INSTALLED
IN HIGH HUMIDITY APPLICATIONS AND UTILIZING STAINLESS
STEEL HEAT EXCHANGERS, BUYER’S REMEDY FOR BREACH, AS
LIMITED HEREIN, SHALL BE LIMITED TO TEN YEARS FROM DATE OF
SHIPMENT FROM SELLER.
These warranties are issued only to the original owner-user and cannot
be transferred or assigned. No provision is made in these warranties for
any labor allowance or field labor participation. Seller will not honor any
expenses incurred in its behalf with regard to repairs to any of Seller’s
products. No credit shall be issued for any defective part returned without
proper written authorization (including, but not limited to, model number,
serial number, date of failure, etc.) and freight prepaid.
OPTIONAL SUPPLEMENTAL WARRANTY
Provided a supplemental warranty has been purchased, Seller extends
the warranty herein for an additional four (4) years on certain compressors.
Provided a supplemental warranty has been purchased, Seller extends
the warranty herein for an additional four (4) years or nine (9) years on
certain heat exchangers.
EXCLUSION OF CONSUMABLES & CONDITIONS BEYOND SELLER’S
CONTROL
This warranty shall not be applicable to any of the following items:
refrigerant, gas, belts, filters, fuses, and other items consumed or warn out
by normal wear and tear or conditions beyond Seller’s control, including
(without limitation as to generality) polluted or contaminated or foreign
matter contained in the air or water utilized for heat exchanger (condenser)
cooling or if the failure of the part is caused by improper air or water supply,
or improper or incorrect sizing of power supply.
Component
Applicable Models
Heat Exchangers
Gas-Fired Units
Heat Exchangers
Low Intensity Infrared Units
Compressors
Condensing Units for Cassettes
Burners
Low Intensity Infrared Units
Other
Components excluding Heat
Exchangers, Coils, Condensers,
Burners, Sheet Metal
Heat Exchangers/Coils
Indoor and Outdoor Duct Furnaces
and System Units, Steam/Hot
Water Units, Oil-Fired Units,
Electric Units, Cassettes, Vertical
Unit Ventilators, Geothermal Units
Compressors
Vertical Unit Ventilators,
Geothermal Units
Burners
High Intensity INfrared Units
Sheet Metal Parts
All Prodcuts
As Modine Manufacturing Company has a continuous product improvement program, it reserves the right to change design and specifications without notice.
© Modine Manufacturi ng Comp any 2016
TEN YEARS FROM DATE OF FIRST BENEFICIAL USE BY BUYER OR ANY OTHER USER, WITHIN
TEN YEARS FROM DATE OF RESALE BY BUYER OR ANY OTHER USER, WITHIN TEN YEARS FROM
DATE OF RESALE BY BUYER IN ANY UNCHANGED CONDITION, OR WITHIN ONE HUNDRED
TWENTY-SIX MONTHS FROM DATE OF SHIPMENT FROM SELLER, WHICHEVER OCCURS FIRST.
FIVE YEARS FROM DATE OF FIRST BENEFICIAL USE BY BUYER OR ANY OTHER USER, WITHIN
FIVE YEARS FROM DATE OF RESALE BY BUYER OR ANY OTHER USER, WITHIN FIVE YEARS
FROM DATE OF RESALE BY BUYER IN ANY UNCHANGED CONDITION, OR WITHIN SIXTY-SIX
MONTHS FROM DATE OF SHIPMENT FROM SELLER, WHICHEVER OCCURS FIRST.
TWO YEARS FROM DATE OF FIRST BENEFICIAL USE BY BUYER OR ANY OTHER USER, WITHIN
TWO YEARS FROM DATE OF RESALE BY BUYER IN ANY UNCHANGED CONDITION, OR WITHIN
THIRTY MONTHS FROM DATE OF SHIPMENT FROM SELLER, WHICHEVER OCCURS FIRST.
ONE YEAR FROM DATE OF FIRST BENEFICIAL USE BY BUYER OR ANY OTHER USER, WITHIN ONE
YEAR FROM DATE OF RESALE BY BUYER IN ANY UNCHANGED CONDITION, OR WITHIN EIGHTEEN
MONTHS FROM DATE OF SHIPMENT FROM SELLER, WHICHEVER OCCURS FIRST.
“APPLICABLE WARRANTY PERIOD”
Modine Manufacturing Company
1500 DeKoven Avenue
Racine, WI 53403
Phone: 1.800.828.4328 (HEAT)
www.modinehvac.com
Loading...