Frick Rotary Screw Compressor RWF II 1080

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: 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

Upload a photo of the new sensor assembly applied with thermal compound

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 procedure requires trained personnel with PPE!

DIN connector plug removed from transmitter

DIN connector plug applied to transmitter

To obtain maximum compressor unit performance and ensure reliable operation, follow a regular maintenance program.

Check the compressor unit daily for leaks

A log should also be maintained.

Initial oil analysis and vibration analysis should be done at start-up and continued per the maintenance schedule.

Sign off on the daily compressor unit check

Performing a few preventive maintenance procedures will extend the life of your pump and reduce the cost per gallon pumped.

Packing adjustment - Occasional packing adjustment may be required to keep leakage to a slight weep; if impossible to reduce leakage by gentle tightening, replace packing or use different type.

End clearance adjustment - After long service the running clearance between the end of the rotor teeth and the head may have increased through wear to the point where the pump is losing capacity or pressure. Resetting end clearance will normally improve pump performance.

Sign off on the preventative maintenance