Operating Manual Freeze Dryer ALPHA 1-2 LDplus Installation and Commissioning of the Unit • 27
4.7. Vacuum Pump Exhaust
During the main drying phase the separate vacuum pump must be
operated with open gas ballast valve. The oil mist which is
produced must be removed.
A ½" hose can be connected to the exhaust flange of the vacuum
pump RZ-2 or RC-5 and a ¾" hose is connected to the exhaust
flange of the vacuum pump DUO 5 or DUO 10. The hose either
leads into the open air or into a vent.
During installation of the pipe care must be taken that condensate
cannot flow back into the pump. With upward leading pipes it is
safest to use a separator (Woulfe's bottle or wash bottle) in the
pipe.
We strictly recommend using an exhaust filter (oil mist separator).
This filter prevents air pollution by oil mist which is emitted by the
vacuum pump in different quantities depending on the working
pressure.
The filter is fastened to the exhaust flange of the vacuum pump.
The filter is equipped with a pressure relief valve indicating the
saturation of the filter. Cleaning or replacing of the filter insert must
be carried out at the latest when the pressure relief valve is
activated. The collected oil is visible in the inspection glass and is
drained via the discharging screw.
(Please refer to separate operating manual of the vacuum pump!)
4.8. Initial Start-up
CAUTION! Ensure that the freeze dryer is correctly mounted and
installed before initial start-up (see point 4.1 Site of Installation and
following points).
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