KNF LABOPORT N820.18 EX Operating Instructions Manual page 94

Operation
34
Chemically-resistant Laboratory pump N820.18 EX / N840.18
10 Operation
10.1 Information on switching the pump on and
off
Switching on the pump
Fig.5: Switching the pump on and off with power switch
The pump must not be started up against operating pres-
sure during switch-on. This also applies during operation
after a brief power failure. If a pump starts up against
pressure, the pump may block, thereby activating block-
ing protection (drive) and switching off the pump.
Fig.6: Switching the pump on and off with rotary/push knob
à
Ensure that no pressure is present in the lines when
switching on.
Translation of Original Operating Instruction, KNF 317428-317425 05/21
EX