KNF LABOPORT N820.18 EX Instrucciones De Funcionamiento Originales página 92

Commissioning
Pump standstill
32
Chemically-resistant Laboratory pump N820.18 EX / N840.18
DANGER
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).
à
Establish normal atmospheric pressure in the lines while
the pump is at a standstill (relieve pump pneumatically).
Connecting the pump
The following item numbers refer to Product description
SH820G (SH820G, SH840G) and to Product description
SR820G (SR820G, SR840G).
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
the supplied tool (see 1 Scope of delivery [} 4]).
2. Screw the silencer or your vacuum system component
onto the pneumatic outlet finger-tight.
3. Connect the line to the pneumatic inlet.
Translation of Original Operating Instruction, KNF 317428-317425 05/21
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 6 Tech-
nical data [} 20]) with the
medium.
EX