ture content must not differ substantially from the ini-
tial values.
11.4.1
Monthly measures during stand-
still
–
Check that the screw compressor package/
chiller is constantly under overpressure. Check
the screw compressor package/chiller for leaks
using a leak detector.
–
Start the oil pump for approx. 5 minutes.
–
Manually rotate the compressor shaft (min. 10
revolutions).
11.4.2 Four weeks before restarting
–
Check the moisture content and ageing condition
of the refrigerating machine oil. Analyse the oil
for this purpose. Compare the results of the anal-
ysis with the values for fresh oil. We recommend
an oil change after 1 year (ammonia as refriger-
ant) (see Maintenance Instructions).
–
Check the insulation resistance of the drive
motors (see the operating manual for the electric
motor).
–
Switch on the oil pump.
–
Check the screw compressor package/chiller for
leakages.
Operating Manual | GEA Grasso M-Series
Screw Compressor Packages
Decommissioning
GEA Refrigeration Germany GmbH | P_261511_1 | Generated 01.04.2015 85
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