Manual

page 28 of 51
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.: 999073 / 15/12/2009
Basic setup continuous pumping
START
STOP
The process control is not active, i. e. the controller is ready for
vacuum control, but control operation has not been started.
☞ The mode as from last operation is reactivated (after first
switching on ”vacuum control” (factory-set) is displayed).
☞ The actual pressure is displayed.
☞ Values as from last operation are reactivated.
☞ Press key START/STOP to start process control.
☞ If a coolant valve should be operated, the coolant valve has
to be preselected, see section ”Changing the basic setup”.
After switching on
Starting and stopping the process control
➨ Starting process control: Press key START/STOP.
☞ If a coolant valve is preselected: Coolant valve opens im-
mediately, the symbol is displayed.
➨ Stopping process control: Press key START/STOP.
☞ The pump is switched off.
☞ Attention: Adopt suitable measures if there is a possible
pressure increase after switching off the pump, e. g. due to
low boiling solvents.
☞ If a coolant valve is preselected: The coolant valve continu-
ous to run for another 5 minutes to allow condensation of
vapours which remain in the system. Symbol ”cooling water”
is flashing.
Venting
(only possible if an external venting valve is connected and configurated)
VENT
Attention: If pressurized
inert gas is used install an
overpressure relief valve.
Max. permitted pressure
at controller: 2 bar
absolute. Ensure that high
pressure is compatible
with the mechanical
stability of the system!
Short venting, e.g. in case of boiling retardation or if sudden
foaming occurs:
➨ Press key VENT shortly (< 2 sec.).
☞ Process control is stopped as if START/STOP was pressed.
Venting the system:
➨ Press key VENT continuously (> 2 sec.) until symbol ”vent-
ing valve” is flashing.
☞ Process control is stopped as if START/STOP was pressed.
☞ Ventilation until pressure does not change any more, i. e.
until atmospheric pressure is attained.
☞ Key START/STOP interrupts venting at any time.