Hermetic Copeland Scroll Compressor ZRD42KC-PFJ-532 R22 For Condensing Unit

The digital scroll compressor unloads by taking advantage of the Copeland Scroll compressor''s axial compliance. All Copeland Scroll compressors are designed so that the compression elements can separate axially a few thousands of an inch. The ZPD34-ZPD54K5, ZPD61-ZPD83KC, ZPD91KC, ZPD104KCE, ZPD122KCE, and ZRD36-81KC compressors described in this bulletin use a lift piston mechanism to separate the scrolls during the unloaded state. When the solenoid is energized the volume on top of the piston is vented to the low side allowing the piston and fixed scroll assembly to move axial away from the orbiting scroll. When the solenoid is de-energized the piston is forced down and the scrolls are loaded axially. The ZPD103KC, ZPD120KC, ZPD137-182KC and ZRD94-125KC digital scroll compressors employ a solenoid valve that is mounted on the side of the compressor that vents the intermediate cavity to the low side of the compressor during the unloaded state.