Install Instructions

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shufe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.
Heat Blower Jumper Settings
PIN Time
1 - 2 180 seconds
3 - 4 120 seconds
5 - 6 90 seconds
7 - 8 60 seconds
Cool Blower Jumper Settings
PIN Time
9 - 10 2 seconds
10 - 11 45 seconds
Remove Existing Control
CAUTION!
To service control, and prior to disconnection, 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.
CAUTION!
Failure to turn off gas and electric supplies can result in explosion, re,death, or personal injury.
6. Disconnect thermostat wires and humidier wires (if equipped
with a humidier).
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 humidiers, evaporator coils, and vent
systems in the area of the control.
* The heating and cooling OFF
delay depends on the option
chosen by the jumper position.
The default settings for the
heating and cooling OFF delays
are 90 seconds and 45 seconds
respectively.
Pre Purge 15
Ignitor Warm Up Time 20
Trial for Ignition 4
Retries 4 retries
Interpurge 15
Post Purge 5
Timing (in seconds unless specified)
Lockout Time 300
Heat Fan ON Delay 45
Heat Fan OFF Delay* 60/90/120/180
Cooling Fan ON Delay 2
Cooling Fan OFF Delay* 2 or 45
Auto Reset 60 minutes
1. Ground yourself properly before installing the new ICM2813 control board.
2. Mount the new control using any screws and fasteners previously removed.
Install New Control
3. Connect all line/low voltage, accessory,
thermostat and ground wires.
4. Verify the sequence of operation.