Johnson Controls Frick RWB II User Manual

RWB II ROTARY SCREW COMPRESSOR UNITS
OPERATION
070.200-IOM (DEC 11)
Page 25
INITIAL START-UP
Initial start‑up must be performed under the super vision of
a Johnson Controls‑Frick authorized start‑up representa‑
tive to prevent voiding the compressor warranty. Prior to the
start‑up, the prestart check (see list in FORMS section) must
be accomplish ed.
INITIAL START-UP PROCEDURE
Having performed the checkpoints on the prestart check list
the compressor unit is ready for start‑up. It is impor tant that
an adequate refrigerant load be available to load test the unit
at normal operating conditions. The following points should
be kept in mind during initial start‑up.
1. For proper and safe operation the compressor must be
run at the proper speed and discharge pressure. Exceeding
design conditions creates a potential hazard.
2. Rotate and lubricate motor bearings according to manu‑
facturer’s recommendations PRIOR to start‑up as required.
3. On units with prelube system a differential pressure of
55 PSI between suction and discharge pressures must be
achieved within five minutes of start‑up or the unit will shut‑
down on “Comp. Differential”.
4. After running the unit for approximately three hours, adjust
liquid injection oil cooling if applicable. If unit has thermosy‑
phon or water cooled oil cooling, adjust water control valve
to cooler.
The compressor slide valve and slide stop potentiometers
should be calibrated.
5. Stop the unit, lock out the motor main disconnect, check
the hot alignment, and adjust as necessary.
NORMAL START-UP PROCEDURE
1. Confirm system conditions permit starting the compres sor.
2. Press the [RUN] key.
3. Allow the compressor to start‑up and stabilize. Press the
[AUTO] key immediately below the V ratio label on the operat‑
ing display screen. Press the [AUTO] key im mediately below
the SV POS label on the operating display. The compres sor
is now operating in the automa tic mode.
4. Observe the compressor unit for mechanical tightness of
the external piping, bolts and valves. Ensure that the machine
is clean from oil and refrigerant leaks. If any of these occur,
shutdown the compressor and correct the problem as neces‑
sary using good safety precautions.
5. RETIGHTEN MANWAY BOLTS at condenser design pres‑
sure (while system is running).
RESTARTING COMPRESSOR UNIT AFTER CONTROL
POWER INTERRUPTION (PLANT POWER FAILURE)
1. Check variable setpoints.
2. Follow normal start‑up procedure.

Johnson Controls Frick RWB II Specifications

General

Brand	Johnson Controls
Model	Frick RWB II
Category	Air Compressor
Language	English