VACUUBRAND VNC 2 - Manual (Page 21)

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.: 999161 / 27/03/2012
page 21 of 45
Notes on configuring the controller
Time delay
• At the end of the process the coolant continues to flow according to the preset time delay. If an in-line
valve is connected, a connected pump also runs for the preset time delay with in-line valve closed for
self cleaning.
Notes on selecting the factory-set configuration
The controller VNC 2 can be adapted optimally to the specific application by choos-
ing the appropriate factory-set mode depending on the components, the application,
and the process.
Automatic valve detection:
When switching on, the controller checks the actual valve configuration. If a valve is
connected, it is monitored and operated automatically until the controller is switched
off. In-line valves and coolant valves are monitored equally.
Automatic NT VARIO detection (only with VACUUBRAND NT VARIO pumps
and VNC 2 VARIO E):
If after switching on the pump (without in-line valve) a NT VARIO-pump is detected,
the controller changes automatically to configuration ”NT VARIO” and stores this
configuration. After a restart the configuration ”NT VARIO“ is active directly.
The preselected values from last operation (e. g. for pressure, speed or switch-off
time) are stored. In case of similar operation conditions it is possible to start immedi-
ately, if the preselections are chosen appropriately.
If selecting another factory-set mode (keep key ”Esc” pressed while switching on),
the configuration for this mode is adopted, the actual configuration gets replaced.
Four factory-set modes are stored in the controller (see section „General view of
factory-set modes“, pg. 19). The individual factory-set modes contain the following
function-specific settings in the program menu:
Vacuum control (pControl): Two point control with 5 minutes time delay.
p set
: 25 mbar, ∆p: Auto, t Off: off, limit: 1060 mbar
VACUU•LAN (VACUULAN):
p set
: 25 mbar, p On: 150 mbar, t Off: 15 min
VACUU•LAN for diaphragm pumps with 8 cylinders with start-up control (3 minutes
start-up delay) (VCL 8cyl):
p set
: 25 mbar, p On: 150 mbar, t Off: 15 min
RC 5 / RC 6 management:
Attention: For factory-set mode ”RC 5 / RC 6 management” please order separate
instructions for use!
NOTICE