Oerlikon RUVAC WA, Installation And Operating Instructions Manual

Page: 56 / 72

Maintenance
56 GA03107_002_A4 - 09/2015 - © Oerlikon Leybold Vacuum
5.4 Cleaning the Fan Cowl and the Cooling Fins
Observe all safety information provided in Sections 0.3 to 0.5 and 5.1.
The slits in the fan cowl as well as the fins on the motor and on the pump
may be contaminated depending on humidity conditions and the degree of
contamination in the ambient air.
In order to ensure a sufficient air flow for the motor and the pump’s casing,
the grid of the fan cowl must be cleaned with a clean brush when contami-
nated.
Any coarse dirt must be removed from the fins on the motor and the pump.
5.5 Cleaning the Intake Screen
Observe all safety information provided in Sections 0.1 to 0.4 and 5.1.
An intake screen is located in the intake port to collect foreign objects. It
should be kept clean in order to avoid a reduction of the pumping speed.
To do so, take off the intake line. Remove the intake screen from the intake
flange and rinse it using a suitable solvent. Then thoroughly dry it with com-
pressed air. If the intake screen is damaged, replace it.
5.6 Cleaning the Pumping Chamber
Observe all safety information provided in Sections 0.3 to 0.5 and 5.1.
Under dirty operating conditions, contaminants may be deposited in the
pumping chamber or on the impellers. After removing the two connecting
lines, the contaminants can be blown out with dry compressed air or flushed
out with a suitable solvent.
Contaminants that cannot be blown or flushed out, can be removed com-
pletely from the pumping chamber with a wire brush, metallic sponge or
scraper.
Then change the oil.
During cleaning, the impellers must be turned only by hand.
Please make sure that the impellers are turned in a way that fingers or
hands can not be trapped between the impellers or between impellers and
housing. Due to the high mass and inertia of the impellers serious injuries
can occur even if the impellers are turned by hand only.
CAUTION
CAUTION
CAUTION
CAUTION