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290
CONTROLS
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Furnace Controls
ICM Control Features and Applications Specications Replaces
Furnace Controls
ICM286
• Microprocessor-based precision
• Controls inducer and blower fan motors, hot surface
ignitor, & gas valve
• Monitors timing, trial for ignition, ame sensing,
pressure and limit switches, and lockout
• Designed for 100% gas shuto in case of ignition failure
• Reverse polarity protection
• Twinning compatible with another ICM286 control board
• Compatible with LP or natural gas
• Diagnostic LED to aid in testing/troubleshooting
• Trial for Ignition: 7 seconds
• Pre-purge Time: 15 seconds
• Ignitor Warm Up Time: 7 seconds
• Post-Purge Time: 15 seconds
• Total Trials for Ignition: 3 (auto reset after 1 hr.)
• Heat Blower On: 30 seconds
• Heat Blower O: Selectable 90/120/150/180 sec.
• Fan (Heat) On/O Delay: 1 sec.
• Cool On: 5 seconds
• Cool O: 45 seconds
• Goodman:
PCBBF112S,
B18099-26S,
0130F00005S
ICM289
• Controls inducer fan motor, blower fan and monitors
limit switches
• Microprocessor based design
• Functions with all 24 VAC thermostats
• Voltage Range: Line (98-132 VAC) @ 60 Hz
• Cool blower: 20A @ 120 VAC
• Heat blower: 20A @ 120 VAC
• Inducer motor: 5A @ 120 VAC
• Cool blower On Delay: 1 second
• Cool blower O Delay: 1 second
• Heat blower On Delay: 45 sec.
• Heat blower O Delay: 90, 150, 210, 270 sec.
• Lennox:
Replaces all BCC1,
BCC2 and BCC3
circuit boards,
including 48K98
and 45K48.
ICM2805A
• Controls gas valve, inducer draft motor, circulating
blower and hot surface ignitor
• Monitors timing, trial for ignition, ame sensing,
lockout, plus pressure, rollout and limit switches.
• Microprocessor-based precision
• Twinning compatible w/ another ICM2805 furnace control
• Diagnostic LEDs aid in testing and troubleshooting
• Voltage Range: Line (98 to 132 VAC) @ 60Hz
• Ignitor: 5A, 120 VAC
• Cool Blower: 10A, 2HP, 240 VAC
• Heat: 5A, ½ HP, 250 VAC
• Inducer Blower: 4A, 120 VAC
• Gas Valve: 1A, 24 VAC
• Humidier Motor: 0.5A, 24 VAC
• Electronic Air Cleaner: 1A, 120 VA
• Nordyne:
903106-Kit
(for use with G3,
G4, G5, G6, M2
and M3 furnace
modules)
ICM291
• Direct Spark Ignition (DSI) control board
• Microprocessor-based
• Controls combustion, blower and indoor motors; spark
ignitor and the gas valve
• Monitors timing, trial for ignition, ame sensing and
lockout
• 100% lockout safety feature
• Compatible with LP or Natural Gas
• Status LED for fault codes to aid in troubleshooting
• Control voltage: 24 VAC (18-30 VAC), 60 Hz
• Line voltage: 208/230 VAC, 60 Hz
• Power cons: 0.3A plus gas valve current @ 24 VAC
• Operating temp: -40°C (-40°F) to 75°C (176°F)
Timing
• Pre-purge: 45 seconds
• Trial for Ignition: 5+2 seconds
• Retry period: Every 20 sec. for 15 min.
• Lockout: manual reset
• Post-purge: 45 seconds
Inputs
• Power: RT and C
• Thermostat interface: R, W and G
• Safety switches: RS, LS, and CS
• Combustion motor Hall Eect sensor
• Flame sensing
Outputs
• Spark
• Gas Valve: GV
• Combustion motor: CM
• Blower motor: BM
• Indoor fan motor: IFO
LED indicators
• Red LED:
Steady ON- normal operation/Flashing – fault codes
• Carrier:
LH33WP003/3A
ICM FURNACE CONTROLS