Heidolph ROTAVAC 20 - Manual (Page 16)

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.: 01-005-005-36-1
page 16 of 35 Translation of the original instructions
4 Use and operation
4.1 Installing in a vacuum system
➨ If there is risk of release of dangerous or polluting fluids, install an appropriate
system to catch and dispose of those fluids.
+ Connect an exhaust line gas tight at the pump outlet if necessary. Always dispose
of exhaust gases appropriately (e.g. into a fume hood).
+ Never block the gas outlet. The exhaust line must always be free of obstructions
(no back pressure) to ensure an unimpeded discharge of gas.
+ 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 safeness against clogging prior to use.
+ 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.
• 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.
• Connection lines at the pump inlet have to be gas tight.
• 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.
• Before switching on check that mains voltage and current conform with the equip-
ment (see rating plate).
• Check that the voltage selection switch is set correctly. Unplug the equipment
before setting the voltage selection switch! Note: If the equipment is switched on
with wrong voltage selection, the equipment may be damaged!
Keep a distance of minimum 20cm between fan and ambient parts.
Avoid throttling losses by using connecting pipes with large diameter and keeping
them as short as possible.
Install outlet pipelines always falling to avoid backflow 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 vapors 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.
If exhaust noise is annoying, connect an exhaust hose.
NOTICE
voltage selection switch
”115”: 90-126 V~
”230”: 180-253 V~