User Guide

FAN
120 VAC
TRANSFORMER
TO SECOND ICM288
FOR TWINNING
FAULT CODES
LEDS Flashes Fault condition
GREEN
ON Steady Normal operation
1 Flash Ignition failure (5 trials)
2 Flashes Pressure switch stuck open
3 Flashes Limit switches open
4 Flashes Pressure switch stuck closed
5 Flashes Twinning problem
6 Flashes Brownout voltage
7 Flashes Hot & Neutral reversed or no ground connected
Continuous Gas valve relay shorted
1 Flash every 2 sec. Flame fault
YELLOW
Continuous Low flame or no flame
ON Flame present
The control has built-in self-diagnostic capability. If a system problem occurs, a blinking LED
shows a fault code.
ICM
288
FURNACE CONTROL MODULE
7313 William Barry Blvd.
North Syracuse, NY 13212
ICM CONTROLS 800.365.5525
www.icmcontrols.com
LII362
(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
usedandnewcontrolsinseparatecontainersbeforetouchingungroundedobjects.
6. ESDdamagecanalsobepreventedbyusinganESDservicekit.
ELECTRICAL RATINGS
• Voltage Range: Line (98 to 132 VAC) @60HZ
• Ignitor: 5A, 120 VAC
• Fan blower: 10A, 2 HP, 240 VAC
• Cool blower: 10A, 2 HP, 240 VAC
• Heat blower: 5A, ½ HP, 250 VAC
• Inducer blower: 4A, 120 VAC
• Gas Valve: 1A, 24 VAC
• Humidifier motor: 10A, 120 VAC
TIMING
• Prepurge Heat: 60 seconds
• Prepurge Cool: 1 second
• Postpurge Heat: 90-180 seconds
• Postpurge Cool: 40 seconds
• Trial for Ignition: 10 seconds
SPECIFICATIONS
CAUTION!
Failure to turn off gas and electric supplies can result in explosion, fire, personal injury or death.
DANGER!
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.
P1
1 – N/C
2 – 24 VAC Common
3 – Limit switch
4 – Gas valve
5 – Pressure switch OUT
6 – Pressure switch IN
7 – Flame sensor
8 – Limit switch IN
9 – 24 VAC Common
P2
1 – HSI
2 – N/C
3 – 120 VAC Neutral
4 – Inducer
5 – N/C
6 – 120 VAC Neutral
PIN CONNECTIONS
FAN
120 VAC
TRANSFORMER
TO SECOND ICM288
FOR TWINNING
FAN
120 VAC
TRANSFORMER
TO SECOND ICM288
FOR TWINNING
The HEAT speed air blower off time delay is selectable for 90 seconds, 120 seconds, 160
seconds or 180 seconds using top two positions of SW1.
The COOL speed air blower off time is fixed for 40 seconds.
The G (Fan) mode, the Fan blower off time is fixed for 1 second.
BLOWER TIMING
OFF Time SWITCH 1 SWITCH 2
90 OFF ON
120 OFF OFF
160 ON OFF
180 ON ON
SW1 Switch 3: Single or TWIN systems
SW1 Switch 4: Select 1st or 2nd stage
DIP SWITCH SETTINGS
• SW1 SWITCHES 1 & 2
• SW1 SWITCHES 3 & 4