Can a universal capacitor and relay be used with Copeland compressors?

The only universal start assist device approved for Copeland single-phase compressors is a PTCR ( Positive Temperature Coefficient Resistor) device with a resistance as low as 12.5 ohms or higher. These devices are made by various manufacturers and are applied parallel to the run capacitor. They are approved only as low volt start assist with piston compressors in systems where the refrigerant pressure equalizes or scroll bearing units.

All other applications must use the specified Copeland start capacitor and relay combination. More.

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