ICM Controls ICM322C Heat Pump Defrost Control Board

ICM322C Heat Pump Defrost Control Board from ICM Controls is a compact, reliable defrost control designed for use with heat pumps. This defrost control board manages fixed 10-minute defrost cycles and offers pin-selectable 30/50/90 minute intervals, ensuring efficient operation and minimal energy loss. It operates on 18–30 VAC at 50/60 Hz and draws only 1 watt, making it a low-power addition to any outdoor unit. With surface-mount mounting using four screws (brand: #6 or #8) or plastic standoffs, it installs quickly and securely. The board is UL and CSA listed, meeting essential safety and compatibility standards for residential and light commercial systems.

• Output Configuration: DPST/NO relay for reversing solenoid valve and defrost relay coil (1 A at 30 V AC).
• Outdoor Fan Relay: SPDT/NC relay rated for 1/2 hp at 240 V AC.
• Timing: Defrost time fixed at 10 minutes; interval time between defrosts pin-selectable (30/50/90 minutes).
• Electrical: 18–30 V AC, 50/60 Hz; power consumption ≤ 1 W.
• Physical: Size 5.5" L × 3.5" W × 1.32" H; surface-mount mounting using four screws or plastic standoffs.
• Compatibility: Designed for use on heat pump units; UL and CSA listed.