The ICM103 Delay-On-Make Timer is a high-precision, solid-state timing solution designed for industrial and residential HVACR applications, specifically compressor staging and motor sequencing. This universal voltage timer operates across an 18-240 VAC range, making it a versatile addition to any service truck. Built with veteran contractors in mind, it features switch-settable time delays ranging from 1 to 1,023 seconds, adjustable in 1-second increments via reliable DIP switches. This eliminates the guesswork associated with analog potentiometers and ensures a repeat accuracy of 0.5% regardless of temperature or voltage fluctuations. The ICM Controls ICM103 is engineered to prevent high-current surges by stagger-starting multiple loads, which significantly reduces mechanical stress on system components. It serves as an exact HVAC replacement part for existing ICM103B, ST-396, S1-024-18220-900, and S1-024-19865-700 units, ensuring a drop-in installation without the need for mounting modifications or field-rigged wiring adjustments. Key Benefits Universal Compatibility: Operates seamlessly on 18-240 VAC systems, consolidating several fixed-voltage inventory items into one part. Precise Digital Accuracy: Binary DIP switch selection allows for exact 1-1,023 second timing, crucial for ice machine applications and multi-stage compressor protection. Rugged Solid-State Construction: Designed to withstand harsh mechanical room environments with a 10-amp inrush rating and 1-amp continuous output. Advanced Equipment Protection: Effectively mitigates nuisance tripping and power surges by ensuring staggered startup cycles for inductive loads. Common Questions How do I set the delay on the ICM103? Timing is configured by summing the values of the active DIP switches. For example, to set a 60-second delay, move the switches labeled 32, 16, 8, and 4 to the "on" position (32+16+8+4=60). What is the difference between ICM103 and ICM103B? The ICM103 is the legacy part number, while the ICM103B is the current manufacturing designation; they are functionally identical and share the same technical specifications for delay on make relays. Can this be used with 24V control circuits? Yes, because it is a universal voltage timer, it operates on standard 24 VAC control circuits as well as 120 VAC or 240 VAC line voltage systems. 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.
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