Operation
Diaphragm pump N680 EX
26
Translation of Original Operation and Installation Instruction, english, KNF 325438 02/22
WARNING
Risk of explosion from elevated ambient tempera-
ture
à
Monitor the ambient temperature (compres-
sion heat, motor heat).
à
Ensure sufficient cooling air supply.
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 side and suction side of the pump. Further infor-
mation is available from KNF Customer Service (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
Replace the diaphragm prior to further opera-
tion (see Chapter
).
Because the diaphragm is a wear part, diaphragm breakage may
occur at any time.
Pump standstill
à
When the pump is at a standstill, establish normal atmospheric pres-
sure in the lines.
Vapors as medium
à
Preventing condensate from forming in the pump will extend the ser-
vice life of the diaphragm. Therefore, only use a warm pump with satu-
rated or nearly saturated vapors.
Operation with open suction-side gas connection can result in con-
taminants and objects being drawn in.
8.2 Information on switching the pump on and off
Switching on the pump
CAUTION
Caution: Damage to hearing
When the pump is in operation, loud noises may
be created (see
which may lead to hearing damage.
à
The pump must be disconnected from all other
components when setting up.
à
Do not operate the pump unless it is fully con-
nected, or use a silencer.
à
Wear personal protection equipment (e.g.,
hearing protection).
à
Ensure that there is normal atmospheric pressure in the lines when
switching on.
