VACUUBRAND PC 3012 VARIO plastic housing - Manual (Page 119)

page 119 of 129
If the pump does not achieve the ultimate vacuum:
- Whenever the diaphragms and valves have been replaced, a break-in
period of several hours is required before the pump achieves its ulti-
mate vacuum.
- In case of an 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 break-in period:
Check hose connectors at pump heads for leaks. If necessary recheck
valve seats and pump chambers.
Reassembling the pump with pumping units
PC 3010/3012 VARIO:
➨
Lay the pump on its side with the rating plate of the pump at the top.
Support pump appropriately.
+
Note that to install the base plate, the exhaust waste vapor condenser
and the condensate flask have to be on top.
➨
Push the console over the threads at the pump feet.
➨
Install the serrated washers. Install the hex nuts and tighten using an
open-ended wrench (w/f 10). Place the pumping unit in normal operat-
ing position.
➨
Attach the connecting hose between the pump and the exhaust waste
vapor condenser at the inlet of the condenser. Connect the exhaust
waste vapor condenser to the coolant circuit. Plug VACUU•BUS cable
into the controller.
Checking the ultimate vacuum
➨
After any intervention at the equipment (e.g., repair / maintenance)
the ultimate vacuum of the pump has to be checked. Only if the pump
achieves its specified ultimate vacuum, the pump’s leak rate is low
enough to ensure that no explosive atmospheres will occur in the inte-
rior of the equipment.
After any intervention at the vacuum sensor the leak rate of the equip-
ment has to be checked.