Maintenance
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300407956_002_C1 - 01/2017 - © Leybold
Fig. 5.3 Expension Vessel
Glykoleinfüllstutzen
Fig. 5.2 Fill port for the main cooling circuit
Glycol fill port
5.6 Purge Gas Pressure and Flow Regulator
Check and test regularly that the function of the N
2
pressure regulator and
the N
2
flow regulator are normal. When the pump is running, supply the N
2
gas and regulate the flow to check the N
2
mass flow works in normal condi-
tion.
Check the gas ballast filter contamination in regards to the ambient air on a
regular basis, and replace the filter insert as appropiate.
5.7 Cooling Water Piping
After operating for a period of time, the cooling water piping might encounter
the problem of a poor cooling effect because of the dirt adhering to the pip-
ing. It will cause the pump casing temperature to rise. A regular cleaning job
is necessary, and the clean frequency is dependent on the quality of the
water. The cooling tower and the filter should also be cleaned often. If the
piping has already been adhered with the dirt, the piping should be cleaned
with a cleaner or be replaced.
5.8 Coolant Level
Check the coolant level in the expansion vessel regularly. If the coolant is
insufficient, re-supply the water-glycol-mixture and keep the level between
FULL and LOW. If the level is really low, additionally fill in coolant directly into
the main cooling circuit (cf. Fig. 5.2). The capacity of the main cooling circuit
and the expansion vessel is approx. 5 litres.
