Frick Rotary Screw Compressor RWF II 399

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

Check the compressor unit daily for leaks, abnormal vibration, noise, and proper operation.

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

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 pressure source connected to the test connection quick connect in the TEST position?

Is the HPCO confirmed to trip the compressor at the correct set point?

Vfd units check skip freq. (f) Check annually

Units with variable speed drives - check for excess vibration and skip frequencies anytime unit operating conditions change.

Failure to enter skip frequencies could cause catastrophic compressor failure or severe compressor damage and result in serious injury or death.

Criteria for identifying elevated energy on VFD packages and establishing skip frequencies

With the RWF Il running loaded at full speed, the entire package must be physically checked for elevated energy, including any corresponding extremities such as valves, liquid injection piping, brackets, tubing, oil cooler and oil piping.

The VFD speed is to be decreased by 100 rpm increments and the entire package physically checked for elevated energy at each stage until the minimum speed range is reached.

As the high energy hot spots are identified, they are to be checked with a vibration meter and any readings that meet or exceed one inch per second must have that frequency range skipped in the microprocessor for the VFD, eliminating the ability of the package to operate within that frequency range.

Oil filter (OF-1) cartridge style

RWF Il compressor units are furnished with one main oil filter (OF-1). A second oil filter (OF-2) is installed as optional equipment to facilitate the changing of the filter element(s) without unit shutdown.

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

The procedure to change filter cartridge(s) is as follows:

1. If a single oil filter is installed, push [STOP] key on microprocessor panel to shut down unit, then open disconnect switches for compressor and oil pump motor starters.

If dual oil filters are installed, open the outlet, then inlet service valves of the standby filter.

Open inlet service valve slowly to prevent a sudden pressure drop which could cause an oil filter differential alarm.

Warning: This check requires trained personnel with PPE!

Check coupling: Check bolts, shim packs, center inserts, keys, and all bolt torques.

Check alignment: Refer to 070.210-IB for foot mounting alignment.

Suction and discharge flange bolts: Verify tightness of bolts on suction and discharge flanges.

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

Check sensor calibration: Check calibration of slide valve, slide stop, pressures and temperatures. Calibration should be conducted with NIST certified devices.

Sign off on the compressor check