● The MVP 015-4 and MVP 030-3 backing pumps have a sufficiently high water vapor tolerance,
and are not equipped with gas ballast valve.
● The MVP 015-2 backing pump is equipped with an electronic gas ballast valve.
● The parameters for automatic gas ballast valve operation of the are factory-set for normal applica-
tion.
Gas ballast
The HiCube Eco turbo pumping station, with MVP 015-2 diaphragm pump as back-
ing pump, is equipped with an automatic gas ballast function. If however run-up
time delays still occur, as a result of condensate in the fore-vacuum area, we rec-
ommend opening the gas ballast valve manually.
Manual gas ballast valve operation in this case involves control via the DCU function keys.
Fig. 18:
Example: DCU display for second parameter set
Open gas ballast valve manually
1. Open advanced parameter set, if necessary
(see chapter “Normal operation”, page 33)
2.
Shut down the turbo pumping station.
3.
Scroll through the entire first parameter set, and the second parameter set directly following
it, to parameter
[030]: ValveMode
.
4.
Press both keys simultaneously: this opens Edit mode.
5.
Select option
"2" = open
.
6.
Press both keys simultaneously: this confirms your selection, and exits Edit mode.
Inject gas ballast
1.
Switch on the turbo pumping station.
2. Operate the turbo pumping station with gas ballast valve open.
– Operating time: approximately 15 to 30 minutes.
Set gas ballast function to automatic
1.
Shut down the turbo pumping station.
2.
Scroll through the entire first parameter set, and the second parameter set directly following
it, to parameter
[030]: ValveMode
.
3.
Press both keys simultaneously: this opens Edit mode.
4.
Select option
"0" = auto
.
5.
Press both keys simultaneously: this confirms your selection, and exits Edit mode.
Operation
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