ICM Controls ICM2818 Installation, Operation & Application Manual page 4

WIRING DIAGRAM
P1 PINOUT
4 7
1
2 5 8
3 6 9
P2 PINOUT
N
4 5 6
1 2 3
IND HSI
BLOWER
GND
120 VAC
COOL L1
HEAT XFMR
P1
24V COM
K5 K6
4
GV
PIN CONNECTIONS
P1
1 – NC
2 – 24 VAC Comm
3 – Limit Switch (R input)
4 – Gas Valve Output
5 – Pressure Switch (W input)
6 – Pressure Switch
7 – Flame Sense
8 – Limit Switch
9 – 24 VAC Comm
P2
1 – Inducer Output
2 – NC
3 – HSI Output
4 – Neutral
5 – Neutral
6 – Neutral
7313 William Barry Blvd., North Syracuse, NY 13212
www.icmcontrols.com
L R
PRI SEC
120 VAC 24 VAC
N C
CHASSIS
EARTH
GND
NEUTRALS
P2
ICM2818
2 9 5
PS
LEGEND
Aux – Auxiliary Limit Switch
(optional rollout switch)
Com – Common
GV – Gas Valve
GND – Ground
HI – High Temp Limit Switch
HSI – Hot Surface Ignitor
IND – Inducer
K5, K6 – Gas Valve Relays
L1 – Line 1
N – Neutral
NC – No Connection
PRI – Transformer Primary
PS – Pressure Switch
SEC – Transformer Secondary
XFMR – Transformer
GND
C W G R
3
6 8
HI AUX
LIMITS
7
FLAME
SENSE
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LIAF328