Heidolph ROTAVAC Vario pumping unit - Manual (Page 56)

page 56 of 61
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.: 999248 / 28/04/2011
➨ Connect hose to the connection at the inlet of the pump.
Tighten union nut first by hand and then tighten one full
turn using open ended wrench.
➨ Assemble controller: Use Phillips screw driver to screw
both screws through the fixing plate in the square nuts in
the housing cover.
➨ Connect control cable to the rear side of the controller. Do
not cant when assembling connection!
➨ 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.