Pfeiffer Vacuum Penta 10, Translation Of The Original Operating Instructions

Page: 16 / 32

16
Operation

Position the ONF on the small flange on the exhaust side of the pump and fit
using the tension ring (accessory); take care with the centering ring.

Screw in hose nipple 241 inplace of the operating fluid drain screw.

Fit operating fluid return hose 242 at both sides on the hose nipples and tighten
with hose clip at the ONF side.
6 Operation
6.1 Before switching on the pump

Check the operating fluid level in the sightglass.

Compare the voltage and frequency information on the rating plate with the
mains voltage and frequency values.

Check that the exhaust connection allows free flow (max. permissible pressure
1.5 bar absolute).
– Activate the shut-off valves in such a way that they open before or at the same
time as the pump is started.

Protect the pump sufficiently from taking in contaminants by means of suitable
precautions (e.g. dust filters); if necessary, check operating fluid regularly or re-
place at shorter intervals.
6.2 Switching on the pump
The pump can be switched on in any pressure range.
No special precautions are necessary when pumping dry gases. In order to attain
the lowest possible final pressures, the gas ballast valve should be closed.

Switch-on pump via remote plug with bridge 50.2.
Standby
The pump can be operated with reduced rotation speed (standby) during process
breaks or in cases with small load. Thus the power consumtion of the pump is re-
duced and the operating temperature of the pump lowered.

Bridge Pin 2 and Pin 4 at remote connection 50.1 (see p. 13, chap. 5.5) ;
– use customized remote plug (see p. 27, chap. 12) .
CAUTION
Hot surface!
Danger of burns if hot parts are touched. Depending on the operating and ambient
conditions, the surface temperature of the pump may rise above 70 °C.

In this case, use suitable finger guards.
NOTE
Improper operating status of the pump!
Simultaneously standby and temperature control mode leads to an increased opera-
ting temperature and therefore to switching off the pump.

In addition, do not use gas ballast while the pump is on standby.