Commissioning
Diaphragm pump N820.18 CN / N840.18 CN
24
Translation of Original Operating Instruction, KNF 317428-338560 06/22
DANGER
Risk of dangerous gas mixtures during
pump operation
Depending on the medium being trans-
ferred, breakage of the media-contact-
ing components can result in a danger-
ous mixture if the medium mixes with
the air in the compressor housing or
the surroundings.
à
Before using a medium, check the
compatibility of the media-con-
tacting components (see
) with the
medium.
Excessive pressure, with all of the associated hazards,
can be prevented by means of a bypass line with a pres-
sure relief valve between the pressure side and suction
side of the pump. Further information is available from
KNF Customer Service (contact data: see
www.knf.com).
Pump standstill
à
Establish normal atmospheric pressure in the lines while
the pump is at a standstill (relieve pump pneumatically).
Connecting the pump
1. Remove the protective caps from the pneumatic connec-
tions of the pump.
Vacuum operation with silencer
1. Remove the hose connector on the pneumatic outlet with
2. Finger-tighten the silencer or its vacuum system compo-
nent on the pneumatic outlet.
3. Connect the line to the pneumatic inlet.
