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.: 999069 / 28/04/2016
Use and operation
Setting up and installing
+
Make sure ventilation is adequate, especially if the pump is installed in an en-
closure, or if the ambient temperature is elevated. Provide external ventilation, if
necessary.
• Reduce the transmission of vibration. Prevent mechanical load due to rigid pipe-
lines. Insert elastic hoses or flexible elements as couplings between the pump
and rigid pipes.
Note
: Flexible elements will compress or flatten when evacuated if not designed
for use under vacuum.
• Hose connections at the pump inlet must always be gas tight.
• If the pump is installed at an altitude of more than 2000 m above mean sea level,
check compatibility with applicable safety requirements, and adopt suitable mea-
sures. There is a risk of the motor overheating due to insufficient cooling.
Keep a minimum distance of 5 cm between cooling fans and surrounding items (e.g.,
housing, walls, etc.), or else install an external automatic ventilation system.
Use connecting hoses with large diameter and keep them as short as possible to
avoid flow losses. Locate the pump as closely as possible to the application.
Always install outlet tubing descending from the pump or provide other measures to
avoid backflow of condensate towards the pump.
NOTICE
Proceed strictly according to the given order and comply with the given time
and pressure data.
Switching on the pumping unit
(pump and vacuum vessel at atmospheric pressure)
➨
Open fore-vacuum valve (V1). Close by-pass valve (V2), high vacuum valve (V3),
and venting valve (V4).
➨
Switch on backing pump (rotary vane pump RZ 2.5 or RZ 6), switch on diffusion
pump.
+
The diffusion pump can be switched on only once the backing pump has been
switched on.
➨
Close fore-vacuum valve (V1) after the heating time (approx. 15 minutes) has
elapsed and the fore-vacuum (M1) is below 0.1 mbar.
➨
Open by-pass valve (V2).
➨
Close by-pass valve (V2) once the pressure inside the vacuum vessel is below
0.1 mbar.
➨
Open fore-vacuum valve (V1).
➨
Open high vacuum valve (V3).
+
Note:
If the fore-vacuum (M1) rises above 0.1 mbar, close the high vacuum valve
(V3) and pump down with the backing pump to a pressure below 0.1 mbar.
+
If the thermal cutout of the rotary vane pump has tripped, it is imperative
that the high vacuum valve (V3) be closed and the diffusion pump switched
off!
NOTICE
Getting started
