Frick Rotary Screw Compressor RWF II 856

WARNING: Do not mix oils of different brands, manufacturers, or types. Mixing of oils may cause excessive oil foaming, nuisance oil level cutouts, oil pressure loss, gas or oil leakage and catastrophic compressor failure.

Shut down the unit when changing oil. At the same time all oil filter cartridges must be changed and all oil strainer elements removed and cleaned.

Press the [STOP] key on the microprocessor panel to stop the compressor unit.

Open the disconnect switch for the compressor motor starter.

Close the suction and discharge service valves; also close the liquid-injection and economizer service valves, if applicable.

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

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

WARNING: Oil-entrained refrigerant may vaporize, causing a separator pressure increase. Repeat venting and recovery procedure, if necessary.

Open the drain valve(s) located on the underside of the separator and drain the oil.

Refer to 070.210-IB for foot mounting alignment.

Check electrical connections (b)

Check and torque all terminals in the processor and starter panel per the specification posted in the enclosure.

Sign off on the 5000 Hourly Rotary Screw Compressor Check

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.

The Oil Level Transmitter is located on the front of the separator near the bottom/center. See Figure 52.

The linear transmitter with hermetic enclosure is based on the capacitive measuring principle.

It features removable electronics (from the sensor well) eliminating the need to evacuate the compressor for replacement. This transmitter is dedicated to oil level control and has no user adjustments.

Remove DIN connector plug from transmitter.

Warning: Follow all safety guidelines and procedures during the replacement process.

Applicable transducer isolation valve closed

NOTICE: To change the discharge pressure transducer (PE-3), it will be necessary to depressurize the entire compressor package. Follow 'General Instructions For Replacing Compressor Unit Components' before going to step 3.

Wiring harness connectors identified

Wiring harness connector disconnected from transducer

Transducer unscrewed using a wrench on the metal hex at the base of the transducer

Wiring harness reconnected to the transducer