page 51 of 58
➨
Assemble the cover plate. Pay attention to lock washers. Put the pump
in normal operating position.
+
Attention
: Make sure that the pump is filled with oil before switching it
on, refill oil if necessary (see ”Oil change”, pg. 35)!
Check the operability of the diaphragm pump by measuring the pressure
in the oil reservoir:
➨
Unscrew the manometer with its adapter (open end wrench width 17
mm). Remove the hose nozzle from the distributor plate (outlet) and
install at the oil inlet. Make sure the O-ring is seated correctly.
➨
Using a suitable vacuum gauge (e.g., DVR 2) and making sure that it
is correctly calibrated, measure the pressure in the oil reservoir. When
the pump operates with the inlet line closed, the measured pressure in
the oil reservoir should be less than 25 mbar (19 Torr) (with gas ballast
valve of rotary vane pump closed).
➨
Remove the hose nozzle from oil inlet. Reinstall it in the distributor
plate and reassemble the manometer with O-ring.
Assembling the connecting hose
➨
Slip the hoses onto the hose connectors by
turning the fittings with an open-ended 14
mm wrench.
➨
Tighten the union nuts of the hose connec-
tions at the pump heads with an open-end-
ed 17 mm wrench.
+
Tighten union nuts first by hand and then
tighten one full turn using the open ended
wrench.
Replace diaphragm and valves of the opposite side of the
pump in the same way.
Checking the operability of the diaphragm pump
