Copeland 940-0001-88 Relay Kit

The Copeland 940-0001-88 Relay Kit is a critical service component designed for high-torque starting requirements in refrigeration and air conditioning systems. This genuine OEM potential relay is engineered to drop the start capacitor out of the circuit once the motor reaches sufficient speed, protecting the start windings from thermal overload. As a direct replacement for the legacy 040-0166-45 model, this kit ensures seamless integration with Copeland compressors without requiring bracket modifications or complex rewiring. Field technicians often utilize this compressor start relay to resolve hard-start issues in systems experiencing high head pressures or erratic voltage. The electromagnetic potential relay design offers superior reliability over generic alternatives by maintaining precise pick-up and drop-out voltage tolerances. When performing a HVAC compressor repair, utilizing this specific 940-0001-88 replacement ensures the electrical characteristics remain within factory parameters, maintaining optimal torque and volumetric efficiency across various operating conditions.

Key Benefits

• The 940-0001-88 provides an exact electrical match for 040-0166-45, maintaining historical performance standards.
• Optimized pick-up voltage settings prevent premature contact arcing, extending the life of the start capacitor.
• Robust construction handles the high current draw typical of commercial refrigeration compressor start-up cycles.
• Direct-fit design simplifies HVACR equipment maintenance, reducing time on the job site for contractors.

Common Questions

Can I use this relay to replace a 3-wire potential relay?
Yes, this Copeland start kit is designed for standard 3-wire configurations. Ensure your wiring harness matches the terminal numbering (1, 2, and 5) to maintain proper coil and contact orientation.

What causes a potential relay like the 940-0001-88 to fail?
Frequent cycling or low voltage can lead to pitted contacts or a failed coil. Replacing the relay along with the associated start capacitor is recommended to ensure the entire starting circuit is functioning correctly.

Is this compatible with non-Copeland compressors?
While technically a potential relay works based on back-EMF, this model is specifically calibrated for Copeland compressor motor specifications. Always verify the pick-up and drop-out ratings against the motor's technical data sheet.

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.