Pfeiffer Vacuum HICUBE PRO, Руководство по эксплуатации

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Operation
21
Standby mode with rotary vane pumps
The switching thresholds for the rotary vane pumps as backing pumps are adjustable via
the DCU. Fluctuations in the power consumption of idling turbopumps and type-depen-
dent varying fore-vacuum pressures of the backing pumps require the switching thresh-
olds to be set separately for the standby mode.
 Determine the switching thresholds for standby operation of the rotary vane pump on
customer side.
 Parameter
[P:794]
= 1 (display extended parameter set)
 Parameter
[P:025]
= 1

Configure thresholds
[P:710]
and
[P:711]
according to the operating instructions
"Electronic Drive Unit".
6.4 Operation with gas ballast valve
Steam or moisture from pumped media can condense in the vacuum pump and hence
impair the suction performance.
Letting in gas ballast improves the discharge of condensate, and the pump achieves the
specified final vacuum more quickly. The gas ballast valve can be replaced with a flush-
ing gas connection if necessary.
 For operation with gas ballast, please refer to the operating manual for the backing
pump.
 Switch off the pumping station via the "ON/OFF" button on the DCU.

Place backing pump and venting valve in continuous operation.
– Parameter
[P:023]
= 0 (turbopump motor off)
– Parameter
[P:025]
= 0 (continuous operation mode for backing pump)
– Parameter
[P:036]
= 7 (venting valve continuous 1)

Switch on the pumping station using key "ON/OFF" on the DCU.
 With the turbopump idle, open the venting screw or allow the venting process to com-
plete using the connected venting valve.
 Clear condensate from the pumping system for around 5 minutes.
 Repeat this process if necessary.
 Restore the initial configuration
(see p. 19, chap. 6.1)
.
 Place the turbopumping station back in operation.
HiPace 300 / TC 400 50 W 70 W
HiPace 400 / TC 400 65 W 110 W
HiPace 700 / TC 400 65 W 110 W
HiCube with turbopump
and ACP Switching Off threshold backing
pump [P:710] Switching On threshold backing
pump [P:711]
Elimination of large amounts of condensate
If the open gas ballast valve alone is not sufficient to reduce the condensate load, the
pumping system with switched off turbopump can be relieved additionally via the vent-
ing connection.
● Prerequisite is an existing display and control unit.
● Admit dry inert gas at the venting connection, if possible.