VACUUBRAND PC 3012 VARIO plastic housing - Manual (Page 39)

page 39 of 129
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Make sure ventilation is adequate, especially if the pump
is installed in an enclosure, or if the ambient tempera-
ture is elevated. Provide external ventilation, if neces-
sary.
• Reduce the transmission of vibration. Prevent mechan-
ical load due to rigid pipelines. Insert elastic hoses or
flexible elements as couplings between the pump and
rigid pipes.
Note: Flexible elements will compress or flatten when
evacuated if not designed for use under vacuum.
• Hose connections at the pump inlet must always be
gas tight.
• A power failure may cause accidental ventilation of the
pump, especially if the gas ballast valve is open. If this
constitutes a potential source of danger, take appropri-
ate safety measures.
• Check the power source and the pump’s rating plate
to be sure that the power source and the equipment
match in voltage, phase, and frequency.
Make sure ventilation is adequate to maintain recommend-
ed operating temperature. Keep a minimum distance of
2 in (5 cm) between the cooling fan and surrounding items
(e.g., housing, walls, etc.), or else install an external auto-
matic ventilation system.
Use connecting hoses with large diameter and keep them
as short as possible to avoid flow losses. Locate the pump
as closely as possible to the application.
Always install outlet tubing descending from the pump or
provide other measures to avoid backflow of condensate
towards the pump.
Use a suitable valve to isolate the pump from the vacuum
application. This is to allow the pump to warm up before
pumping condensable vapors and to clean the pump after
use before it is switched off.
NOTICE