KNF N920 AP.18, Руководство по эксплуатации

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Operation Diaphragm Vacuum Pumps N 920__.18 and N 920 KT.29.18G
14 Translation of original Operating Instructions, English, KNF 121416-121419 07/18
WARNING
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 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.
7.3. Switching pump on and off
Switching pump on
The pump may not start up against pressure during switch-on.
This also applies in operation following a brief power failure. 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.

Switch on pump with mains switch (see fig. 2).
Depending on the level of the applied electrical voltage, initiali-
zation of the electronics can take up to one second, before the
pump starts.
Switching off the pump/removing from operation

When transferring aggressive media, flush the pump prior to
switch-off to increase the service life of the diaphragm (see
chapter 8.2.1).

Switch off pump with mains switch (see fig. 2).

Open pressure and suction lines to normal atmospheric pres-
sure.

Disconnect the power source.
7.4. Adjusting the flow rate
N 920 AP.18
The flow rate cannot be varied.
N 920 AP.29.18 und N 920 KT.29.18G
The pump's speed can be varied via the potentiometer (fig. 2/ 3 ).
The flow rate can be adjusted this way.