KNF N963, Operating And Installation Instructions

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Diaphragm Pump N936 Operation
Translation of Original operating and installation instruction, English, KNF 320276-320275 09/19 19
WARNING
Risk of bursting of pump head due to excessive
pressure increase
à
Do not exceed the maximum permissible op-
erating pressure (see
4 Technical data ).
à
Monitor the pressure during operation.
à
If the pressure exceeds the maximum permis-
sible operating pressure of the pump: immedi-
ately switch off the pump and remedy the fault
(see Chapter
10 Troubleshooting ).
à
Only throttle or regulate the air or gas quantity
on the suction line to prevent the maximum
permissible operating pressure from being ex-
ceeded.
à
If the air or gas quantity on the pressure line is
throttled or regulated, make sure that the max-
imum permissible operating pressure at the
pump is not exceeded.
à
Ensure that the pump outlet is not closed or
restricted.
Excessive pressure, with all of the associated hazards, can be pre-
vented by means of a bypass line with a pressure relief valve be-
tween the pressure and suction sides of the pump. Further informa-
tion is available from the KNF technical adviser (contact data: see
www.knf.com).
WARNING
Risk of dangerous gas mixtures during pump op-
eration if diaphragm breaks
If the diaphragm should break, the medium will
mix with the air in the compressor housing or in
the surroundings.
à
Stop pump immediately.
à
The diaphragm must be replaced prior to fur-
ther operation (see Chapter
9 Servicing ).
WARNING
Personal injury and damage to the pump through
automatic start
If pump operation is interrupted by the thermal
switch due to overheating, the pumps start auto-
matically after they have cooled.
à
Ensure that no dangerous situations can
arise as a result.
Operation with open suction-side gas connection can result in con-
taminants and objects being drawn in.
Pump standstill
à
When the pump is at a pump standstill, establish normal atmospheric
pressure in the lines.