ICM Controls ICM203 Relay

The ICM Controls ICM203 is a heavy-duty delay-on-break timer designed to provide essential compressor lockout protection for HVAC and refrigeration systems. This anti-short cycle timer functions as a universal voltage relay, operating seamlessly across a range of 18-240 VAC. By preventing the compressor from restarting immediately after a power interruption or thermostat opening, it mitigates the risk of motor burnout and mechanical stress caused by high head pressure. The unit features a user-adjustable knob, allowing for precise time delay relay settings between 0.03 and 10 minutes (1.8 to 600 seconds) to match specific manufacturer specifications.

Engineered for professional contractors, the ICM203 utilizes a simple two-wire hookup that integrates directly in series with the control circuit. It offers a 1.5 amp output rating with a robust 15 amp inrush capacity, ensuring reliability in demanding industrial environments. This HVAC compressor protection module is a versatile service-van staple, effectively replacing a wide array of legacy components from brands like Mars, Robertshaw, and Supco.

Key Benefits:

• Universal 18-240 VAC compatibility simplifies truck stock and field replacements.
• Adjustable 0.03 to 10-minute delay range provides flexible short cycle protection for diverse equipment.
• True thermostat interruption protection remains effective even in the presence of control circuit trickle current.
• Compact 2x2 inch footprint with a single-hole mount ensures easy installation in crowded electrical panels.
• Reliable 1.5A continuous and 15A inrush rating supports standard contactor coils and inductive loads.

Common Questions:

How do I wire the ICM203 for 120V or 240V applications?
For standard 24 VAC circuits, use the control as packaged. For higher voltage 120/240 VAC circuits, you must cut the onboard jumper wire before installation to ensure proper internal timing and component protection.

Does this relay protect against power flickers?
Yes. Any interruption in power, whether from the thermostat opening or a momentary utility brownout, will trigger the delay period. The load will not re-energize until the user-set timing sequence has fully elapsed.

Can I use this timer with a heat pump?
Absolutely. The ICM203 is designed for all HVACR applications, including air conditioners, refrigeration units, and heat pumps, to prevent damaging rapid restarts of the compressor.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.