RXB PLUS ROTARY SCREW COMPRESSOR UNITS S70-101 IOM
Page 35
OPERATION
INITIAL START-UP PROCEDURE
Having performed the checkpoints on the prestart check list,
the compressor unit is ready for start-up. It is important 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. On start-up, the unit should be operated at as high a load
as possible for 3 hours. During this period, adjust liquid injec-
tion oil cooling if applicable. If the unit has water- cooled oil
cooling, adjust the water control valve to the cooler. No ad-
justment is required for thermosyphon oil cooling.
2. The compressor slide valve potentiometer should be cali-
brated.
3. After three hours, stop the unit and open the motor’s main
disconnect. Check hot alignment and adjust as necessary.
4. Pull and clean the suction strainer after 24 hours of opera-
tion. Repeat every 24 hours until the system is clean.
NORMAL START-UP PROCEDURE
1. Confirm that system conditions permit starting the com-
pressor.
2. Press the [RUN] key.
3. Allow the compressor to start up and stabilize. At start-up
the slide stop (volumizer) and the slide valve (capacity con-
trol) are in the AUTO mode.
RESTARTING COMPRESSOR UNIT AFTER
CONTROL POWER INTERRUPTION
(PLANT POWER FAILURE)
1. Check ADJUSTABLE setpoints.
2. Follow normal start-up procedure.
To Next Page
Loading...
