User Manual

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.: 999164 / 19/05/2009
page 20 of 75
Use and operation
Installing in a vacuum system
• Connection lines at the pump inlet have to be gas tight. Particles and dust must
not be aspirated, the user has to provide appropriate lters if necessary. The user
must ensure their suitability concerning gas ow, chemical resistance and safe-
ness against clogging prior to use.
• Connect an exhaust line gas tight at the pump outlet if necessary. Always dispose
of exhaust gases appropriately (e.g. into a fume hood). If there is risk of release of
dangerous or polluting uids, install an appropriate system to catch and dispose
of those uids.
• Reduce the transmission of vibration and prevent mechanical load due to rigid
pipelines. Insert elastic hoses or exible elements as couplings between the pump
and rigid pipes. Attention: Flexible elements tend to shrink when evacuated.
• The gas outlet must never be blocked. The exhaust line has always to be free
(pressureless) to ensure an unimpeded discharge of gas.
• In case of mains failure accidental venting of the system, especially with an open
gas ballast, may occur. If this may cause possible dangers provide suitable safety
measures.
• Make sure ventilation is adequate especially if the pump is installed in a housing or
if the ambient temperature is elevated. Provide external ventilation if necessary.
Avoid throttling losses by using connecting pipes with large diameter and by keeping
them as short as possible.
In case of perturbing exhaust noise connect an exhaust hose or use a silencer (see
”Accessories”).
Install outlet pipelines always falling to avoid backow of condensate towards the
pump.
Use of a suitable valve to isolate the pump from the vacuum system is recommended
to allow the pump to warm up before pumping condensable vapours or to clean the
pump before it is switched off.
When assembling, ensure vacuum-tightness. After assembly, check the whole sys-
tem for leaks.
Secure hose connections at the pump appropriately against accidental detaching.
The VACUUBRAND controller CVC 3000 can only be operated with components
compatible to the VACUUBRAND VACUU•BUS system, see accessories.
The vacuum controller CVC 3000 controls VACUUBRAND diaphragm pumps NT
VARIO and VARIO-B, pumping units PC 30xx VARIO and optional coolant and vent-
ing valves. Connected components (e.g. venting valve, level sensor, external pres-
sure transducer 3000 series) are automatically identied and congurated.
Do not use more than one controller within the same VACUU•BUS system. Sev-
eral controllers in the same VACUU•BUS system will interfere with each other
and result in error messages of the connected components (pumps, valves).
NOTICE
When switching on the controller CVC 3000 for the very rst time, a menu to select the language of the
controller menu is displayed. Select the desired language (e.g. ”English”) by turning the selection knob
and press to conrm. Then select the pressure unit (”mbar”, ”Torr” or ”hPa”) in the same way.
It is possible to access the language selection menu at any time by switching on the controller
while keeping the selection knob pressed.