B10 COMPRESSOR PURGING
Procedure to purge the compressor
(after maintenance jobs):
STATUS:
Stop valves of suction, discharge and oil return line
are still closed (refer to §B5) and compressor is
filled with oil (refer to §B6).
a) Connect a vacuum pump to the evacuation/
purging valve(s) and evacuate as prescribed by local
regulations. For the location of these valves refer to
the "Engineering Data".
b) When evacuation is completed open the discharge
stop valve.
c) Watch suction and discharge pressure.
If suction pressure increases quickly, the
discharge valve assy is leaking.
d) Start compressor.
e) Slowly open suction stop valve.
f) Open the stop valve in the oil return line of the oil
separator (if present).
g) If a Self-Limiting Automatic Purger is not installed,
purge the refrigerating system (refer to the plant
manual).
B11 TROUBLESHOOTING TABLE
The troubleshooting table on the next pages may
be helpful to quickly trace and remedy failures
that interfere with the proper operation of the
compressor. It is emphatically pointed out that the
cause of a failure must often be sought in the
refrigeration installation itself. Therefore, it is
necessary besides this table also to consult the
plant manual.
For Monitron CR controlled installations refer also
to its own trouble shooting table.
Refrigeration Division
Grasso
B: INSPECTION, MAINTENANCE
AND TROUBLE SHOOTING
v001.99.01.en Installation and Maintenance Manual RC(U)6 B1.7
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