Compressor Replacement

Removal

Remove the compressor compartment bracket.
Isolate the compressor from the system.
1. Front seat the discharge service valve by turning the valve fully clockwise.
2. Front seat the suction service valve by turning the valve fully clockwise.
3. Turn the digital service valve one quarter turn to the right. Refer to Isolate Compressor for additional information.
Recover the refrigerant charge from the compressor. Refer to Recovering Refrigerant from System
Remove discharge service valve, suction service valve, digital control valve line and vapor injection valve line from the compressor.
Remove compressor discharge temperature sensor from the discharge valve manifold.
Disconnect the unit from the three-phase power supply.
Remove the three-phase electric power connection from the compressor.
Remove the compressor mounting tray bolts and nuts.
Slide the compressor from the unit.
Keep compressor ports covered to prevent dust, dirt, etc., from falling into compressor.

Slide the compressor into the unit. Install mounting bolts, washers and nuts, and tighten.
Bolt the discharge and suction service valves to the compressor. Use a new gasket coated with compressor oil on the discharge valve.
Connect vapor injection line and digital control valve line to compressor body.
Apply refrigerant locktite to the threads of the compressor discharge temperature sensor. Install the switches.
Pressurize the refrigeration system and check for leaks (Refer to Leak Testing Refrigeration System).
If no leaks are found, recover the refrigerant used for the leak test (Refer to Leak Testing Refrigeration System).
Evacuate the system (Refer to Evacuation and Cleanup of Refrigeration System).
Connect three-phase electric power to the compressor.
Recharge the unit with R-404A/R-452A (Refer to Charging System with Refrigerant).
Perform a controller pretrip test to verify system operation.