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The SUPCO pro22 is a PRO Series relay and overload combination unit designed for single-phase compressor starting applications in refrigeration and air conditioning systems. Operating at 230 volts, this combination device integrates a start relay and thermal overload protector into a single assembly, reducing the component count and simplifying service calls. Licensed HVAC and refrigeration technicians install this type of combination starter on hermetic compressors where the original relay or overload has failed or degraded. Its consolidated design makes it a practical choice for field replacement work.
The pro22 is suited for residential and light commercial refrigeration and cooling equipment. Typical applications include window air conditioners, refrigerators, freezers, and small unitary HVAC equipment that use single-phase hermetic compressors operating at 230 volts. When the original start component wears out, a combination relay and overload unit like this allows a technician to restore normal compressor operation with a single replacement part rather than sourcing a relay and overload separately.
Designed as an OEM-style replacement relay and overload combination for single-phase hermetic compressors in 230-volt refrigeration and air conditioning equipment.
Installation should be performed by a qualified HVAC or refrigeration technician. Disconnect and lock out all power to the unit before removing the existing relay or overload. Confirm the replacement voltage rating matches the compressor nameplate before installation. Verify that compressor terminals are clean and undamaged before fitting the new combination unit.
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