Frick Rotary Screw Compressor RWF II 676

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

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

Applicable transducer isolation valve closed

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

Shut down the compressor and allow pressures to equalize.

Isolate suction transducer PE-4 from the unit and depressurize.

Measure voltage across the red and black wires of the transducer.

Recover or transfer all refrigerant vapor before opening to atmosphere.

Measure the voltage of PE-4 on connector P6A on the Analog Board.

Voltage reading of PE-4 at standard atmospheric pressure.

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

Measure the voltage of PE-1 on connector P5A on the Analog Board.

Voltage reading of PE-1 at standard atmospheric pressure.

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.

When changing the coalescer filter element(s) it is recommended that the oil be changed, cartridge(s) in oil filters OF-1 and OF-2 if applicable be changed and the following applicable strainer elements be removed and cleaned.

Use of filter elements other than Frick may cause warranty claim to be denied.

1. See Changing oil, Steps 1 through 8.

2. Loosen manway cover retainer bolts, remove retainers, manway cover and cover gasket. Discard cover gasket.

3. Remove and retain nut securing coalescer filter retainer.

4. Remove retainer, coalescer filter element and 2 O-rings. Discard filter elements.' 5. Install new coalescer filter element(s).