VACUUBRAND PC 620 NT - Manual (Page 17)

page 17 of 63
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.: 999188 / 19/05/2009
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 filters if necessary. The user
must ensure their suitability concerning gas flow, 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 fluids, install an appropriate system to catch and dispose
of those fluids.
• Reduce the transmission of vibration and prevent loading due to rigid pipelines.
Insert elastic hoses or flexible elements as couplings between the pump and rigid
pipes. Attention: Flexible elements tend to shrink when evacuated.
• The exhaust line has always to be free (pressureless) to ensure an unimpeded
discharge of gas.
• Especially if the gas ballast valve is open, a power failure may cause uninten-
tional ventilation of the pump and the vacuum system. In case this constitutes a
potential source of danger, take appropriate safety measures.
• Make sure ventilation is adequate if the pumping unit is installed in a housing or
if ambient temperature is elevated. Provide external venting if necessary. Keep a
distance of minimum 20cm between fan and ambient parts.
Avoid throttling losses by using connecting pipes with large diameter and keep 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 backflow of condensate towards the pump.
When assembling, ensure vacuum-tightness. After assembly, check the complete
system for leaks.
Secure hose connections at the pump appropriately against accidental detaching.
The VACUUBRAND controller CVC 3000 can only be operated with components
which are compatible to the VACUUBRAND VACUU•BUS system, see accessories.
The vacuum controller controls VACUUBRAND diaphragm pumps NT as well as op-
tional coolant and venting valves. Connected components (e.g. venting valve, level
sensor, external pressure transducer 3000 series) are detected and configurated
automatically.
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).
The vacuum controller CVC 3000 is equipped with an integrated capacitive pressure
transducer with ceramic diaphragm to measure the actual pressure independent of
the gas type and depending on the vacuum, i. e. absolute.
NOTICE
When switching on the controller CVC 3000 for the very first 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 confirm. 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.