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.: 999019 / 22/12/2009
page 25 of 29
Montage of the connecting hose:
If the pump does not achieve the ultimate pressure:
☞
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.
If all pump heads achieve a vacuum below 120 mbar but pump does not achieve the
ultimate total pressure:
Check hose connectors between pump heads and manifolds for leaks. If necessary
recheck pump chamber.
☞
Reassemble the pumping unit.
➨
Use open ended wrench (w/f 15) to reconnect hose to elbow
fitting.
➨
Tighten union nuts first by hand and then tighten
one
full
turn using open ended wrench (w/f 17).
Changing the valve at the outlet manifold
➨
Note position of valve and remove.
☞
Check valve for damage and replace if necessary. Make
sure that the valve is correctly seated.
➨
Reassemble cover plate and manifold cover.
➨
Use open ended wrench (w/f 15) to reconnect hose to elbow
fitting
➨
Tighten union nut first by hand and then tighten
one
full turn
using open-ended wrench (w/f 17).
➨
Use open-ended wrench (w/f 17) to loosen the union nut of
the hose, which runs directly to the cover plate of the outlet
manifold, at the pump head.
➨
Use open-ended wrench (w/f 15) to turn elbow fitting 1/4 of a
turn, remove hose. Do not remove the elbow fitting from the
pump head.
➨
Unscrew the countersunk head screws at the manifold cover
and remove cover plate and manifold cover.
