Installation, Operation & Application Guide
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products – plus wiring diagrams, troubleshooting tips and more, visit
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ICM2812
Hot Surface Ignition (HSI) Control Board
Features
• Hot Surface Ignition (HSI) control board
• Microprocessor-based
• Monitors timing, trial for ignition, system switches,
flame sensing and lockout.
• 100% lockout safety feature
• Compatible with LP or Natural Gas
• LED indication for status and fault codes to aid in
troubleshooting
• HSI Hot Surface Ignitor: 6 amp @ 120 VAC
• Gas Valve: 1.5 amp @ 24 VAC
• Inducer draft motor: 2.2 FLA @ 120 VAC
• Blower motor: 14.5 FLA @ 120 VAC
Outputs
Only trained personnel should install or service heating
equipment. When working with heating equipment, be sure
to read and understand all precautions in the documentation,
on labels, and on tags that accompany the equipment.
Failure to follow all safety guidelines may result in damage to
equipment, severe personal injury or death.
Safety Considerations
The ICM2812 has incorporated LED diagnostics to assist in
troubleshooting. Fault code information can be found in this
application guide. Please keep this application guide with the
furnace installation manual for future reference.
Introduction
Electrostatic Discharge (ESD) Precautions
Use caution when installing and servicing the furnace to avoid and control electrostatic discharge;
ESD can impact electronic components. These precautions must be followed to prevent electrostatic
discharge from hand tools and personnel. Following the precautions will protect the control from ESD
by discharging static electricity buildup to ground.
1. Disconnect all power to the furnace. Do not touch the control or the wiring prior to discharging your body’s electrostatic charge
to ground.
2. To ground yourself, touch your hand and tools to a clean, metal (unpainted) furnace surface near the control board.
3. Service the furnace after touching the chassis. Your body will recharge with static electricity as you shuffle your feet or move
around, and you must reground yourself.
4. Reground yourself if you touch ungrounded items.
5 Before handling a new control, reground yourself, this will protect the control. Store the used and new controls in separate;
containers before touching ungrounded objects.
6. ESD damage can also be prevented by using an ESD service kit.
Specifications
• Control voltage: 24 VAC (18-30 VAC), 60 Hz
• Line voltage: 120 VAC, 60 Hz
• Operating temperature: -40˚to 175˚F (-40˚to 80˚C)
Replaces
See pages at end of this instruction.