2. ICM Controls
  3. ICM282B

ICM Controls ICM282B Product information

  • Hello! I've reviewed the schematic diagram for the ICM282B control board. This document provides detailed information regarding the electrical connections, blower speeds, and various control functions of the board used in heating systems. I'm here to help answer any questions you have about its components, features, or functionality as described in the diagram.
  • What type of wire should be used if replacing original equipment wiring?
    What should I do if the blower motor speed is not optimal?
    What kind of wire should be used for the connection between disconnect switch and the furnace junction box?
    What kind of fuse should be used to replace a blown fuse?
    What is the ignition lockout behavior?
PRINTED CIRCUIT BOARD
(WHEN USED)
NOTE #10
ALS PRSDSS
(WHEN USED)
NOTE #12
BVSS (WHEN USED)
LGPS
NOTE #11
NOTE #12
23 1
56 4
8
9
7
FSE
PL7
FRS1 FRS2
IDM
NOTE #5
GV
FL:
1-M
2-C
WHT (COM)
(WHEN USED) NOTE #10
SEC-2 SEC-1
LED-1
EAC-2 L2
WHT
WHT
RED
WHT
WHT
YEL
GRN
WHT
BLU
RED
ORN
BLU
RED
BLK
WHT
WHT
TRAN
SPARE 1 SPARE 2 EAC 1
BLWM
WHT
BLK
3
2
1
2
1
2
1
WHT
BLK
BLK
WHT
WHT
BLK
BLK
2 1
PL2
PL1
L1
PR1
PL3
PL6
PL5
HSI
GRN
BLK (HI)
YEL
(MED HI)
BLU
(MED LO)
WHT
(COM)
BLW NEUTRAL
HEAT
COOL
NOTE #13
1110987654321
J2
COM
24V GWYR
150
90
180
120
J1
FU1
HUM
TEST/TWIN
BLOWER OFF DELAY
JUMPER SELECT
BLK
WHT
BLK
WHT NEUTRAL
L1
JB
ILK
FUSED OR CIRCUIT BREAKER
DISCONNECT SWITCH (WHEN REQ’D)
NOTE #4
GND
BRN
BRN
CAP-1START
OL
RED (LO)
76
18
42
34
210
85
51
69
9
11
7
3
G
Y
R
W
COM (24 VAC)
NOT USED
NOT USED
FSE
2-C NOTE #5
GV
1-M
(WHEN USED)
NOTE #12
(WHEN USED)
NOTE #10
(WHEN USED)
DSS BVSS
LGPS
NOTE #11
NOTE #11
PRS
FL
LS
FRS1 FRS2
SEC-1 SEC-2
HUM
TEST/TWIN
FU1
GRV-1
NOTE #6
PL1 PL7
ALS
(WHEN USED)
NOTE #10
IDM
CAP-1
1
3
2
1
22
PL3
HSI
COM
1
22
PL5
PL6
1
22
PL2
PR1
IDR
NOT USED
24 VAC
115 VAC
HSIR
BLWR
L1
L1 L2
HI/LO
EAC-1
START
OL
EAC-2
BLWM
L2
ILK
NOTE #4
LO
MED LO
MED HI
HI
COOL
SPARE-1
HEAT
SPARE-2
EQUIPMENT GROUND
TO 115 VAC FIELD DISCONNECT
SCHEMATIC DIAGRAM
(NATURAL GAS and PROPANE)
NOTE #7
1. If any of the original equipment wire is replaced, use wire rated for 105°C.
2. Inducer (IDM) and blower (BLWM) motors contain internal auto-reset thermal overload
switches (OL).
3. Blower motor speed selections are for average conditions. See installation instructions for
details on optimum speed selection.
4. Use only copper wire between the disconnect switch and the furnace junction box (JB).
5. The wire must be connected to furnace sheet metal for control to detect flame.
6. Replace only with 3 amp fuse.
7. Blower-ON delay, gas heating 25, 45 or 65 seconds, cooling or heat pump 2 seconds.
8. Blower-OFF delay, gas heating 90, 120, 150 or 180 seconds, cooling or heat pump 90
seconds or 5 seconds when J2 is cut.
9. Ignition-lockout will occur after four consecutive unsuccessful trials-for-ignition. Control
will auto reset after three hours.
1 0 . When used, auxiliary limit switch (ALS) is on some downflow models only. When used, FL is
on upflow models only. FRS1 and FRS2 only used on downflow and horizontal models.
11. Factory connected when LGPS is not used
1 2 . Factory connected when BVSS is not used. BVSS used when Chimney Adapter Accessory
Kit is installed.
1 3 . Neutral connections are interchangeable within the NEUTRAL connector block.
PCB
PRINTED CIRCUIT BOARD
NOTE #6
TRAN
LAPP127
CPU
BHT/CLR BLWR
LEGEND
BHT/CLR Blower Motor Speed Change Relay, SPDT
BLWR Blower Motor Relay, SPST-(N.O.)
BLWM Blower Motor
CAP Capacitor
CPU Microprocessor and Circuitry
EAC-1 Electronic Air Cleaner Connection (115 VAC 1.5 Amp Max.)
EAC-2 Electronic Air Cleaner Connection (Common)
FL Fuse Link
FRS Flame Rollout S/W – Manual Reset, SPST-(N.C.)
FSE Flame-Proving Electrode
FU1 Fuse, 3 Amp, Automotive Blade Type, Factory Installed
FU2 Fuse of Circuit Breaker Current Interrupt Device
(Field Installed and Supplied)
GND Equipment Ground
GV Gas Valve – Redundant Operators
GVR Gas Valve Relay, DPST-(N.O.)
HI/LO Blower Motor Speed Change Relay, SPDT
HSI Hot Surface Ignitor (115 VAC)
HSIR Hot Surface Ignitor Relay, SPST-(N.O.)
HUM 24 VAC Humidifier Connection (.5 Amp Max.)
IDM Induced Draft Motor
IDR Induced Draft Relay, SPST-(N.O.)
ILK Blower Access Panel Interlock Switch, SPST-(N.O.)
JB Junction Box
LED Light-Emitting Diode for Status Codes
LGPS Low Gas Pressure Switch, SPST (N.O.)
LS Limit Switch, Auto Reset, SPST (N.C.)
OL Auto-Reset Internal Motor Overload Temperature Switch (N.C.)
PCB Printed Circuit Board
PL1 11-Circuit PCB Connector
PL2 2-Circuit PCB Connector
PL3 3-Circuit Adapter Connector
PL5 2-Circuit Adapter Connector
PL6 2-Circuit HSI Connector
PL7 9-Circuit Adapter Connector
PRS Pressure Switch, SPST-(N.O.)
TEST/TWIN Component Test and TWIN Terminal
TRAN Transformer - 115 VAC/24 VAC
Junction
Unmarked Terminal
PCB Terminal
Factory Wiring (115 VAC)
Factory Wiring (24 VAC)
Field Wiring (115 VAC)
Field Wiring (24 VAC)
Conductor on PCB
Field Wiring Terminal
Field Earth Ground
Equipment Ground
Field Splice
Plug Receptacle
FU2
LS
ICM282B
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