Memmert VO Series, Operating Manual

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D39374 | Date 08/2018 15
Design and description
Vacuum pump rinsing valve
When drying feed materials with a high moisture content, the pump capacity may de-
crease during prolonged operation due to condensation in the pump heads. The dia-
phragms are blown free by briefly flushing the pump heads with fresh air.
This improves the efficiency of the drying process. In combination with the optionally
available pump modules PM29, PM49 and PM101, this cyclical flushing takes place auto-
matically when the pump output decreases. The drying process is thus faster and more
energy-saving and the pump is protected.
Speed control and switch-off of the vacuum pump
After completing a drying program or after a long period of operation without a vacuum
request from the controller, the vacuum pump installed in the pump module (PM) is
switched off via the control line. The demand-controlled pump speed control saves
energy, is low-noise and increases the service life of the vacuum pump by protecting the
pump diaphragms.
Note: A control signal switches off the pump module (PM) installed in the optional
vacuum pump. The operating light in the main switch of the pump module also lights up
if the vacuum pump has been switched off via the control line.
2.7 Designation ( nameplate)
The nameplate (Fig. 9) provides information about the appliance model, manufacturer
and technical data. It is attached to the front of the appliance, on the right behind the
door.
Typ: V0101 F.-Nr.: S618.0001
230 V~ 10.5 A 50/60 Hz 2400 W
DIN12880-Kl.3.1 Nenntemp.: 200 °C
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10
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Fig. 9 Nameplate (example)
1 Type designation
2 Operating voltage
3 Applicable standard
4 Protection type
5 CE conformity
6 Address of manufacturer
7 Disposal note
8 Temperature range
9 Connection / power ratings
10 Appliance number