ICM Controls ICM2813 Installation, Operation & Application Manual

INSTALLATION, OPERATION & APPLICATION GUIDE
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REPLACES
Lennox: 10M9301, 12L6901, 32M8801, 56L8401, 24L8501,
63K8901, 97L4801, 100925-01, 100925-03, 17W9201, 23W5101,
30W2501, 69M0801, 69M1501, 83M00
White-Rodgers: 50A65-120, 50A65-121, 50A62-120, 50A62-121,
50A62-820, 21D83M-843, 50A66-122, 50A66-123
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS
Use caution when installing and servicing
CAUTION
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.
Integrated Furnace Control Board
INTRODUCTION AND OPERATION
The ICM2813 is a form, fit, and functional replacement for the
Lennox and White Rodgers boards shown in the cross reference
section of this guide. The ICM2813 automated gas ignition
control board monitors the ignition sequence including the
inducer, pressure switch, hot surface igniter, gas valve, flame
sense, and circulating blower while maintaining full safety circuit
monitoring including the high limit switch, roll out switch and
auxiliary limit switch circuits. Onboard diagnostics will indicate
when a fault condition exists.
SPECIFICATIONS
• Electrical Rating @ 77°F (25°C)
• Input Voltage: 18-30 VAC, 60 Hz
• Ignitor Current: 2.0 amp @ 80 VAC, 60 Hz (resistive)
• Inducer Relay: 2.2 FLA–3.5 LRA @ 120 VAC
• Blower Relay: 9.5 FLA–25.0 LRA @ 120 VAC (Heat / Cool / Fan)
• Gas Valve Relay: 1.5 amp @ 25 VAC, 60 Hz 0.6 pf
Environmental
• Operating Temp Range: -40° to 176°F (-40° to 80°C)
• Humidity Range: 5 to 95% relative humidity (non-condensing)
REMOVE EXISTING CONTROL
To service control, and prior to disconnection,
CAUTION
label all wires. Failure to do so may result in
wiring errors which can cause dangerous operation.
1. Turn thermostat to OFF position or set it to the lowest
possible setting.
2. Turn OFF electrical supply to furnace.
3. Turn OFF gas supply to furnace.
4. Remove furnace blower and control access doors.
5. Remove control box cover.
Failure to turn off gas and electric supplies can
CAUTION
result in explosion, fire,death, or personal injury.
6. Disconnect thermostat wires and humidifier wires (if
equipped with a humidifier).
7. Disconnect line voltage, blower, electronic air cleaner wires
(if equipped), and transformer wires.
8. Remove wiring harness from circuit board.
9. Remove screws or any other fasteners and old circuit board.
10. Examine control and control box to check for water stains.
11. Make repairs if any sources of water leakage are found.
Be sure to check humidifiers, evaporator coils, and vent
systems in the area of the control.
ICM2813