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Replace the non-return valve seal
•
Unscrew the exhaust flange using a 21 mm spanner. This operation
can be done with or without the fan cover
•
Replace the o-ring seal of the exhaust valve
O-ring seal to replace
•
Fit the parts back into the fixed scroll, and tighten up carefully using
a 21 mm spanner
Dispose of any waste material in accordance with all the relevant
and applicable safety and environmental requirements.
Particular care must be taken with components that have been
contaminated with dangerous process substances.
Running-in
If the electrical wiring has been removed inside the terminal box, check
for the right direction of rotation of the pump by running the pump
with a opened inlet, and by checking that the air is drawn in.
Check the ventilator running.
A helium leak test can be performed to check the leak rate.
Nominal factory level: 1x10
-6
mbar.l/s.
FO 0015 A
Additional maintenance
To guarantee safe operation, we recommend that the pump is serviced
by Busch at least every 8000 hours of operation.
For that, the pump must be disconnected from your installation. De-
pendent on application, the pump must be cleaned or purged with ni-
trogen. All safety precautions concerning the product must be
observed.
In case of return to your local Busch Agency, please send back with the
pump a written form which confirms that the pump only was in
contact with harmless substances.
Otherwise you must complete a certificate of absence of danger in
which however any incidental danger and the corresponding safety
measures must be indicated.
Prior the shipping, the vacuum pump must imperatively be decontami-
nated and the degree of contamination must be documented in a de-
claration of decontamination ("Declaration of Decontamination of
Vacuum Equipment and Components"), which can be downloaded
from www.buschvacuum.com.
Informations
We would be happy to supply further information if needed, as fol-
lows:
–
–
CAUTION
Type sheet Fossa FO
Declaration of Decontamination
Informations
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