ICM Controls ICM2910 General instructions

Installation, Operation & Application Guide
For more information on our complete range of American-made
products – plus wiring diagrams, troubleshooting tips and more, visit
us at www.icmcontrols.com
ICM2910
Ignition Control Board
Features
• Direct Spark Ignition (DSI) control board
• Microprocessor-based
• Controls spark ignitor and gas valve
•Monitorstiming,trialforignition,amesensingand
lockout
• Compatible with LP or natural gas
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
Failure to turn off gas and electric supplies can result in
explosion, re, death, or personal injury.
! CAUTION !
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.
Electrostatic Discharge (ESD) Precautions
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.
Specifications
• Control Voltage: 102-138 VAC
• Flame Current: 1uA minimum
• Current Draw: 50mA maximum
• Gas Valve: 1.5A@120VAC
• Flame Failure Response Time: 0.8 seconds max
• Operating temperature: -40˚F to 175˚F (-40˚C to 80˚C)
• Pre-purge: 7 seconds
• Inter-purge: 7 seconds
• Trial for Ignition: 15 seconds
• Trials: 3
Replaces
Fenwal: 35-725903-997
When the thermostat initiates a “Call for Heat”, the ICM2910
will perform a hardware check, after the hardware check the
ICM2910 will start a 7 second pre-purge. Once the pre-purge
has ended, the spark source and the gas valve relay are
energized simultaneously for 15 seconds. A ame rectication
circuit conrms the presence of the ame, upon ame
detection; the spark source turns off, while the gas valve
remains open for the duration of the heat call.
If ame is not sensed the control will turn off the spark source
and gas valve and start the 7 second inter-purge before the
next trial for ignition. If ame is not detected after 3 trials for
ignition, the control will enter a hard lockout. To remove the
hard lockout: either the input voltage to the control or the
thermostat’s heat call will have to be recycled.
Mode of Operation

Troubleshooting
Symptom Problem
Unit fails to start Check the following: wiring, voltage between pins 3 and 4. If voltage is not present; check the
thermostat and the appropriate fuses or circuit breaker.
No Spark Check the following: wiring, spark cable connection. Verify the spark electrode is not shorted (there
should be 1/8” gap between the center rod and the electrode).
Gas Valve does not
open
Verify voltage between pins 2 and 6. If voltage is present, check gas valve for incorrect wiring and
defects. If voltage is not present, check polarity of L1 and L2 connections.
Flame not recognized Remove the heat call and check the following: polarity of L1 and L2 connections, gas supply, spark
wiring, ame sense wiring and the burner ground connection. Clean the ame rod. Initiate a call for
heat and ensure a steady ame is enveloping the ame rod.
ONE-YEAR LIMITED WARRANTY
The Seller warrants its products against defects in material or workmanship for a period of one (1) year from the date of
manufacture. The liability of the Seller is limited, at its option, to repair, replace or issue a non-case credit for the purchase prices
of the goods which are provided to be defective. The warranty and remedies set forth herein do not apply to any goods or parts
thereof which have been subjected to misuse including any use or application in violation of the Seller’s instructions, neglect,
tampering, improper storage, incorrect installation or servicing not performed by the Seller. In order to permit the Seller to properly
administer the warranty, the Buyer shall: 1) Notify the Seller promptly of any claim, submitting date code information or any other
pertinent data as requested by the Seller. 2) Permit the Seller to inspect and test the product claimed to be defective. Items claimed
to be defective and are determined by Seller to be non-defective are subject to a $30.00 per hour inspection fee. This warranty
constitutes the Seller’s sole liability hereunder and is in lieu of any other warranty expressed, implied or statutory. Unless otherwise
stated in writing, Seller makes no warranty that the goods depicted or described herein are t for any particular purpose.
7313 William Barry Blvd., North Syracuse, NY 13212
(Toll Free) 800-365-5525 (Phone) 315-233-5266
www.icmcontrols.com
LIAF272
Wiring Diagrams
Burner
SPARK
Burner Ground
Remote
Flame Sense
7
6
5
4
3
2
1
Gas
Valve
Burner
Spark
Burner Ground
7
6
5
4
3
2
1
L2
120 VAC
Thermostat
L1
Gas
Valve
1 Burner ground
2 Gas valve hot
3 L2 (neutral)
4 L1 (120 VAC hot)
5 N/A
6 Gas valve neutral
7 Remote flame sense
Pin # and Description
L2
120 VAC
Thermostat
L1
Dimensions