Mcquay Hsa Screw Compressor Service Manual Jun 2026

The HSA series comprises several models, identifiable by the numeric code in the model name, which generally indicates relative size and capacity. Known models include:

Detailed wiring diagrams and specifications for solid-state starters, including motor load amps and overload class settings.

: Specific replacement parts for Frame 4 single-screw compressors are documented in the Frame 4 Issue 7 (H) Parts List . Key Technical Features mcquay hsa screw compressor service manual

The manual covers unique mechanical features of the McQuay single-screw design, which balances rotational loads to achieve extremely low vibration and noise levels. Birso Soğutma Description Capacity Control

Safety controls tripped (High-pressure switch, Low-pressure switch, Oil differential switch). Phase monitor detecting phase reversal or phase asymmetry. Verify line voltage across all three phases. The HSA series comprises several models, identifiable by

Shut down the chiller and lock out/tag out (LOTO) all primary power disconnects.

Disconnect and lock out all electrical power supplies to the compressor motor and control circuit panels. Verify the absence of voltage using a calibrated digital multimeter. Key Technical Features The manual covers unique mechanical

Check solenoid sealing and the movement of capacity slides. Verify if unloader coils or valves are faulty. Excessive Noise at Startup

Verify the liquid line sight glass color indicator to ensure the system is free of moisture.

Internal thermistors embedded in the motor windings monitor temperature, feeding data to an external solid-state protection module (e.g., SE-B1 or SE-B2 module). 3. Lubrication System & Oil Maintenance