website, but specific service and training guides are frequently accessed via specialized archives: HS-3100 Series Manual:

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The HSA uses a hydraulic slide valve for capacity control (typically 25%, 50%, 75%, 100%). The manual must provide:

Comprehensive Guide to McQuay HSA Screw Compressor Service Manuals: Best Practices and Maintenance McQuay (now part of Daikin Applied

This comprehensive guide serves as an essential reference for HVAC technicians, facility managers, and engineers looking to optimize their McQuay HSA screw compressor operations.

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HSA compressors use a combination of radial roller bearings and angular contact thrust bearings. Because screw compressors generate massive axial loads during gas compression, bearing wear is inevitable. The manual provides the exact procedure for measuring axial end-play to determine if the bearings require replacement. 3. Mandatory Preventative Maintenance Schedule