Maintenance
61
Check the oil level via the holes provided for this purpose. For it, remove the rubber
caps on the side covers and put them back in place after oil check: they protect the
product against the intrusion of solids and liquids.
Semi Option:
check the proper operation of safety interlocks [N2 pressure, exhaust
overpressure, exhaust ventilation pressure, FB and Roots motor temperature (FB
MOT, RSV1 MOT)]
once every 6 months
.
9.4
Freeing up the FB
By-products generated by processes clogg the pump by deposition.When the FB rotation
is no more possible, an alarm is displayed and the pump stops. It may be possible to free
it up manually.
Switch off the pump by positioning the main switch
to
O
: the white indicator
Power
turns off.
Remove the front cover (1).
Remove the protective cover (2) and the O-ring (3) by removing the three M4 x 10 CHc
screws.
Using a 21 mm female elbow wrench, move the driving shaft in both directions of ro-
tation until free rotation is obtained.
Fig. 22: Freeing up the FB
Clean the O-ring and grease it lightly with vacuum grease.
Reinstall the O-ring (3) and the protective cover (2).
Reinstall the front cover (1).
9.5
Standard repair exchange
To proceed with a standard exchange, key steps must be followed in sequential order:
DANGER
Risk to the health in the event of contact with toxic substances
During pump disconnection, operator could be in contact with process residues on the
exhaust that could cause severe injury or death.
Take the appropriate safety measures to prevent injury. Consult the department man-
ager for instructions and safety information.
NOTICE
Risk of damage to the pump
Using excessive force to rotate the FB may damage the pump.
3
2
1
Summary of Contents for A 1204H
Page 88: ...ETL Mark...
Page 89: ...Certificate of conformance to SEMI...
