Frick Rotary Screw Compressor RWF II 177

Shut down the compressor and allow pressures to equalize

Isolate suction transducer PE-4 from the unit and depressurize

Voltage across the red and black wires of the transducer

Recover or transfer all refrigerant vapor, in accordance with local ordinances, before opening to atmosphere

Voltage of PE-4 on connector P6A on the Analog Board

Voltage reading at standard atmospheric pressure

Adjusted voltage reading for elevation

Isolate the oil pressure transducer PE-1 from the package and open it to atmosphere

See Publication 070.660-SM for procedures covering replacement motor and compressor mounting.

Push [STOP] key on control panel to shut down unit.

Open disconnect switches for compressor and pump motor starters.

Close suction and discharge service valves, also liquid injection and economizer service valves, if applicable.

Slowly vent separator to low-side system pressure using the bypass line on the suction trap.

Recover or transfer all refrigerant vapor, in accordance with local ordinances, before opening to atmosphere. The separator must be equalized to atmospheric pressure.

Warning: This procedure requires trained personnel with PPE!

EZ-CAL High pressure cut-out check valve test block

Is the EZ-CAL test block installed on the package?

Is the pressure transducer wired to the Quantum HD controller?

Is the tubing run to the compressor discharge connection?

Is the HPCO fully open to the discharge pressure source in the RUN position?

Is the external source connected directly to the HPCO in the TEST position?

Is the function of the HPCO and pressure setting confirmed by application of external pressure?

WARNING: Be extremely careful not to loosen thermowell while attempting to remove the temperature sensor. The use of two wrenches will be necessary to ensure the thermowell remains stationary. Loss of oil and/or refrigerant could occur. Exposure to refrigerant fumes and/or hot oil can cause injury or death.

Upload a photo of the DIN connector plug removed from transmitter

Thermal compound applied to new sensor assembly

New sensor assembly inserted into thermal well and knurled ring tightened

Upload a photo of the DIN connector plug applied to transmitter

NOTICE: The temperature sensor is factory set. If calibration is required, refer to Calibration Instructions in publication 090.040-O for service technicians.

WARNING: This section must be read and understood before attempting to perform any maintenance or service to the unit.

If unit is running, press [stop] key.

Disconnect power from unit before performing any maintenance.

Wear proper safety equipment when compressor unit is opened to atmosphere.

Take necessary safety precautions required for the refrigerant being used.

WARNING: Close all compressor package isolation valves prior to servicing the unit. Failure to do so may result in serious injury.

Keep refrigerant and oil clean and dry, avoid moisture contamination.