KNF SC 920 G Mode D'emploi page 64

Operation
Pump standstill
Inspect and empty collection
20 Translation of original Operating Instructions, English, KNF 334631-334633 07/21
WARNING
WARNING
CAUTION
In order for the high-performance condenser to recover solvent
from the delivered gas, it must be cooled by means of a cold
water supply or recirculating cooler.
When using a coolant valve:
WARNING
With the pump at a standstill, open pressure and suction lines to
normal atmospheric pressure
At appropriate intervals, inspect the fill level in the condensation
flasks collection flasks located on the suction and pressure sides of the
vacuum pump system (Fig. 2/12 and 15, page 11). When needed,
empty the collection flasks; properly dispose contents.
Switching vacuum pump system on
The vacuum pump system may not start up against overpres-
sure during switch-on. During operation as well, there may be
no overpressure in the pneumatic lines. If a pump starts against
pressure, it may block. This activates the thermal switch, and
the pump switches off.
Vacuum Pump System SC 920G
Hazard of the vacuum pump system bursting due to
excessive pressure increase
 Do not exceed max. permissible operating
pressure (0 bar).
 Monitor pressure during operation.
 If the pressure exceeds the maximum permis-
sible operating pressure, immediately shut down
vacuum pump system and eliminate fault (see
chapter 10, page 36).
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
processes simultaneously).
Danger of high performance condenser bursting.
The high-performance condenser is not pressure-
proof.
 Make sure that the high performance
condenser's gas outlet is not blocked.
Danger of the high performance condenser bursting
 Make sure that the coolant valve is mounted
between the coolant supply and the coolant inlet
port of high performance condenser .