Operating The System - VWR VP 8 Vac Manuel D'instructions

Pump standstill
 With the pump at a standstill, open pressure and suction lines to normal atmospheric pressure.
 Open fine adjustment valve.
 Press the knob of safety vent valve.
Automatic starting can cause personal injury and pump damage
When the operation of the pump is interrupted by the thermal switch, the pump will restart
automatically after cooling down.
 After triggering of the thermal protection or in the event of power failure, remove the
WARNING
pump's mains plug from the socket so that the pump cannot start uncontrollably.
 Attempt work on the pump only if the pump is separated from mains power.
Venting
Personal injury caused by poisoning or explosion and damage to the pump.
 Make sure that no reactive or explosive mixtures will be produced when ventilating the
vacuum system through the air inlet.
 Make sure that the media are compatible with each other (when running two different
WARNING
processes simultaneously).
High performance condenser
Danger of high performance condenser bursting
 Make sure that the high performance condenser's upper gas outlet is not blocked.
CAUTION
7.3

Operating the System

The numbered positions within the following instructions refer to fig. 4, page 8.
Operate the system
1. Prepare the rotary evaporator for destillation.
2. Prepare system for operation
a) Completely close fine adjustment valve (6) by turning knob in a clockwise direction.
b) Turn on digital vacuum meter (7) by pressing the ON button.
c) Turn on pump using the on/off switch (12) and switch (11) at operating unit in case this has not
yet happened.
The pump may not start up against pressure during switch-on. If a pump starts against pressure, it
may block. This activates the thermal switch, and the pump switches off.
 Make sure that no pressure is present in the lines during switch-on.
d) Turn on system using the on/off switch (10).
3. With the rotary evaporator submerge the glass flask containing the liquid to be evaporated into the bath.
4. With the fine adjustment valve (6) slightly reduce the pressure in the system by turning the valve knob in
an anti-clockwise direction.
If the pressure falls too rapidly, i.e. the vacuum is too strong: aerate the system a little by gently pressing
the head of the safety vent valve (8).
5. Once the distillation starts in the glass flask i.e. the required vacuum has been reached, the pump can
be switched off using the on/off switch (11) of the operating unit. The distillation process is now running
independently. The pump only has to be restarted using the on/off switch of the system (11) if the
pressure in the system increases because of leakage from the rotary evaporator.
6. The evaporation rate can be increased as follows:
English
11