Heidolph ROTAVAC Vario pumping unit - Manual (Page 18)

page 18 of 61
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.: 999248 / 28/04/2011
4 Use and operation
4.2 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.
When switching on the controller 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.
4.1 Using a ROTACOOL reflux cooler
If using the ROTAVAC vario Pumping unit together with
the ROTACOOL reflux cooler, place the ROTAVAC vario
Pumping unit directly on top of the ROTACOOL.
If using the ROTAVAC vario Pumping unit without the
ROTACOOL reflux cooler, an extra foot has to be in-
stalled for operation with the condensate cooler (14; in-
cluded in the scope of delivery of the condensate cool-
er). Position the ROTAVAC vario Pumping unit simply
on the extra foot, thereby placing the pump’s feet in the
four hollows of the extra foot.
Install the coolant hoses in such a way that the stability
of the pump is assured even with a full catchpot