Copeland 940-0001-48 Relay Kit

As a technician, you know that a high-torque start is essential for commercial refrigeration longevity. The Copeland 940-0001-48 Relay Kit is a critical OEM potential relay kit designed to optimize the starting torque of residential and commercial compressor motors. Operating at 114V, this relay effectively manages the start capacitor circuit, disconnecting it once the motor reaches approximately 75% of its rated speed. This precise switching prevents winding overheating and ensures the HVACR system hits operating RPMs without excessive amperage draw.

Replacing a failing start relay with this genuine Copeland replacement part eliminates common field issues like humming compressors, tripped breakers, and "short-cycling" during high-load conditions. Measuring 3.5" x 2.7" x 2.2", its compact envelope fits into most standard electrical housings. This kit is a direct OEM HVAC part that restores the factory-standard performance required for critical refrigeration motor starter applications. When troubleshooting a system that fails to kick over under pressure, verifying the potential relay voltage and installing this 48-spec kit is the standard repair protocol for maintaining high-efficiency operation.

Key Benefits:

• Enhanced Starting Torque: Provides the necessary electrical boost to overcome high head pressures during startup.
• Precision Voltage Sensing: Engineered to disconnect the start capacitor at the exact 114V threshold to protect motor windings.
• Direct OEM Compatibility: Ensures a seamless fit for Copeland refrigeration systems without the need for mounting modifications.
• Heavy-Duty Construction: Built for high-cycle industrial use, reducing the frequency of call-backs for compressor start issues.

Common Questions:

How do I know if my existing potential relay has failed?
If the compressor hums but fails to start, or if you measure no continuity across the relay contacts when it should be closed, the relay is likely carbon-pitted or stuck. A visual check for burnt terminals is also recommended.

Can I use this relay for a 230V application?
No. This specific kit is rated for 114V. Using it on a higher voltage circuit will cause immediate component failure. Always verify the voltage on the compressor’s nameplate before installation.

Does this kit include the start capacitor?
This is the potential relay kit only. While it controls the capacitor's engagement, the capacitor itself must be sized according to the compressor’s specific microfarad (MFD) requirements.

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.