Vacuum Pumps N 920 APE-W and N 920 APDC-B
Installation and connection
Translation of original Operating and Installation Instructions, english, KNF 121690-121708 09/19
19
7.3. Pneumatic connection
CAUTION
Personal injury or damages to property by ejected
protective plugs
If the protective plug at the pressure side of the
pump
hasn’t been removed, it could be ejected be-
cause of the overpressure during operation.
➔
Remove the protective plug during the installa-
tion.
➔
Only connect components to the pump which are designed for
the pneumatic data of the pump (see Chapter 4, Technical
➔
If the pump s used as a vacuum pump, safely discharge the
pump exhaust at the pump’s pneumatic outlet.
➔
KNF recommends mechanically disengaging the pump from
the piping system. This can be achieved with flexible tubing or
pipes, for example. This will avoid transferring to the system
any pump oscillations that may arise.
Connecting pump
A marking on the pump head shows the direction of flow.
CAUTION
Risk of injury due to mixing up suction and pressure
side
Confusion between suction and pressure sides can
lead to breakage of connected components on the
suction and pressure sides.
➔
Observe the marking of the inlet/outlet.
1. Remove the protective plugs from the hose connection
threads.
2. The accessories silencer, filter, and hose connectors (where
applicable) are screwed into the port threads.
The filter or silencer is to be mounted on the suction side or
pressure side of the pump head. With multiple-head pumps,
this relates to the first pump head or last pump head.
3. Connect the suction line and pressure line (see Chapter 4,
Tab. 9 for mounting dimensions).
4. Lay the suction and pressure line at a downward angle to pre-
vent condensate from running into the pump.
Connected
components
Pump exhaust
Disengaging
