ICM Controls ICM203F Timer

The ICM203F Delay-On-Break Timer is a specialized anti-short cycle relay designed to protect air conditioning, refrigeration, and heat pump compressors from premature failure caused by rapid cycling. This 18-240 VAC universal voltage timer features a knob-adjustable delay ranging from 0.03 to 10 minutes (1.8 to 600 seconds), providing precise control over compressor lockout intervals. As a 2-wire time delay relay, the ICM203F installs in series with the control circuit, maintaining a 1.5-amp continuous current rating and a substantial 15-amp in-rush capacity for standard contactor coils.

This unit serves as the direct ICM200F replacement and is functionally identical to the ICM203FB. Upon power application, the load is energized immediately. When the thermostat opens or a power loss occurs, the ICM203F initiates the delay period, preventing the compressor from restarting until the set time has elapsed. For technicians performing retrofits, this timer effectively mitigates issues caused by thermostat "hunting" or brief power interruptions, ensuring system pressures equalize before the next start cycle.

Key Benefits:

• Universal Voltage Compatibility: Operates across a wide 18-240 VAC range, suitable for both low-voltage control circuits and line-voltage applications.
• Enhanced System Protection: Integrated compressor lockout logic prevents short cycling, extending the operational life of expensive system components.
• Simplified Installation: Features a standard 2-wire hookup with 6-inch lead wires for fast integration into existing control cabinets.
• Adjustable Timing Range: The 0.03-10 minute potentiometer allows for specific configuration based on manufacturer specifications or system requirements.
• High Amperage Rating: Supports up to 1.5 amps, accommodating larger contactors without the need for additional switching relays.

Common Questions:

How do I wire the ICM203F for 120/240V versus 24V applications?
For standard 24 VAC control circuits, use the unit as packaged. For 120/240 VAC line voltage applications, the internal jumper wire must be cut according to the technical schematic to ensure proper timing accuracy and component longevity.

Can this timer be used with anticipator-type thermostats?
Yes, the ICM203F is engineered to function correctly with anticipator-style thermostats, providing reliable interruption protection even in systems with low-level trickle currents.

What is the difference between this and the ICM200F?
The ICM203F is the designated successor to the ICM200F. It offers improved technical tolerances and broader timing adjustment while maintaining the same physical footprint and electrical ratings.

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.