Mcquay Hsa Screw Compressor Service Manual

The McQuay HSA compressor utilizes a direct-drive twin-rotor design. The male rotor features four lobes which mesh into a six-flute female rotor. This helical profile provides continuous, positive-displacement compression with minimal vibration. Slide Valve Capacity Control

: Inspect the shaft seal, service valves, and housing gaskets for oil traces, which indicate refrigerant leaks. mcquay hsa screw compressor service manual

Capacity modulation is handled by an internal slide valve located underneath the rotors. The McQuay HSA compressor utilizes a direct-drive twin-rotor