Install the new OEM filter element and replace the O-ring seal (lubricate the O-ring with clean compressor oil). Torque the cover bolts to specification in a star pattern.
The electronic controller energizes the load solenoid valve. This routes high-pressure oil behind the slide valve piston, pushing it forward to increase capacity.
: Includes a suction strainer and a built-in oil filter to protect internal components. Gate-Rotors
Primarily optimized for R-134a, R-22, or eco-friendly replacements, depending on the specific model variation and oil charge. mcquay hsa screw compressor service manual
Ensure ample clearance around the chiller for maintenance access.
Stepless or stepped slide valve mechanism operated via hydraulic oil pressure.
Attach a recovery machine to the schrader valves on the compressor housing. Recover the refrigerant down to 0 psig (or local regulatory vacuum requirements). Step 2: Oil Draining and Filter Replacement Install the new OEM filter element and replace
Replace oil filter; Clean suction screen; Add approved oil; Crankcase heater failure—check heater operation.
Measure resistance between phases (U-V, V-W, W-U). Resistance values must be balanced within ±2%.
Thoroughly flush the chiller piping to remove acid deposits. This routes high-pressure oil behind the slide valve
: A high-efficiency internal separator that maximizes oil recovery. Built-in Filtration
The capacity slide valve, governed by a load solenoid valve (B) and an unload solenoid valve (A), controls the compressor's output from roughly 25% to 100% capacity.