8
4.1. Important Information
Before starting the pump pay attention to:
– max. permissible chamber volume
– max. permissible intake pressure for
continous operation, (see Section 8.0
Technical Data).
CAUTION
Danger of burns!
When the pump is running, surfaces and motor
casing become hot.
If the pump is subjected to condensates it
should be allowed to run for approximately
30 minutes under atmospheric pressure before
switching off. This will insure that the compres-
sion spaces are free of any condensables.
CAUTION
WARNING
4.2. Switching The Pump ON And OFF
The pump can be switched on and off within the permissible
intake and exhaust pressure range.
– Lowest starting temperature is +12°C (50 Deg. F).
➡
Switch the pump on using the built in ON/OFF switch (14).
– The motor has a thermal protection switch which turns
the motor off in case of prolonged very high load opera-
tion.
– Please be certain to ascertain the cause of the problem
and eliminate it.
After cool-down of the motor protection switch,
the pump automatically starts.
CAUTION
4. Operations
Automatic speed control
The pump is equipped with a pressure switch 17 for
automatic rotation speed control.
The rotation speed is reduced automatically at final vacuum
to minimize the power consumption and the emission sound
pressure level of the pump.
Pressure transducer for automatic speed control
17 Pressure transducer
17
.
