Heidolph ROTAVAC vario control - Manual (Page 28)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 999223 / 08/07/2009
page 28 of 34
➨ Position housing cover.
☞ Move housing cover slightly to make sure that the head
covers are correctly positioned.
➨ Screw in the six socket head screws fixing the housing
cover crosswise first slightly, then tighten.
☞ Do not tighten until head cover is in contact with housing,
max. torque 6 Nm.
Replace diaphragms and valves similarly on the other side of the pump (only
ROTAVAC vario control).
➨ Use open ended wrench (w/f 14) to reconnect hose to el-
bow fitting.
➨ Tighten union nut first by hand and then tighten one full
turn using open ended wrench.
If the pump does not achieve the ultimate vacuum:
- In case the diaphragms and valves have been replaced, a run-in period of several hours is required
before the pump achieves its ultimate vacuum.
- In case of unusual noise switch off pump immediately and check clamping disc positions.
If the specified ultimate vacuum is not achieved and if this does not change after the run-in period:
Check hose connectors at pump head for leaks. If necessary recheck valve seats and pump cham-
bers.