: Focuses on routine preventative measures, such as monitoring running hours
Requires a water flow switch (paddle type) to prevent compressor slugging or evaporator freeze-up during startup. Troubleshooting Common Issues McQuay HSA Screw Compressor Manual | PDF - Scribd mcquay hsa screw compressor service manual
The McQuay HSA screw compressor service manual provides comprehensive guidelines and instructions for maintenance, troubleshooting, and repair of the compressor. By following the recommended maintenance schedule and procedures, operators can ensure optimal performance, extend the lifespan of the compressor, and prevent unexpected downtime. : Focuses on routine preventative measures, such as
Introduction The McQuay HSA series screw compressors are robust rotary compressors used in commercial HVAC and industrial chilling systems. This post summarizes key points from the service manual and gives practical maintenance tips to keep HSA compressors reliable and efficient. Introduction The McQuay HSA series screw compressors are
| Problem | Likely Cause (from manual) | Solution | | :--- | :--- | :--- | | High discharge temp | Low suction superheat or oil starvation | Check expansion valve, clean oil strainer | | No capacity control | Slide valve stuck or broken piston ring | Remove actuator, inspect slide valve bore | | Loud rattling noise | Worn rotor bearings or debris in rotors | Immediate teardown – do not restart | | Oil level dropping | Failed oil separator coalescer or leaking shaft seal | Replace separator element, replace shaft seal kit |