KNF N 012 AT. 16 E, Руководство по эксплуатации и установке

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Cleaning Diaphragm Vacuum Pumps N 012, N 024, N 036
18 Translation of original Operating and Installation Instructions, english, KNF 121222-121485 08/11
6. Cleaning
When changing valve plates and wave diaphragm, inspect all parts
for dirt before assembling the pump head, and clean them if nec-
essary.
If a compressed air line is available, blow the parts out with it.
7. Trouble Shooting
Before working on the pump isolate the power supply se-
curely, then check that the lines are not live.
The following tips for fault-finding are best employed in the se-
quence shown.
Pump produces no flow
 Thermal switch has opened due to over-heating of motor:
 Disconnect pump from mains and allow to cool.
Trace cause of over-heating and eliminate it.
 Connections or lines are blocked

An external valve is closed, or a filter blocked.
 Liquid (condensate) has collected in the pump head:
 Let the pump run for a few minutes pumping air (if
necessary for safety reasons: pumping an inert
gas.)
 Install the pump at the highest point in the system.
 Diaphragms or valve plates are worn:
 Section 5 Servicing.
Flow, pressure, or vacuum too low
 Compare the actual performance with the figures in section
9 or the data sheet.
 Liquid (condensate) has collected in the pump head
 Let the pump run for a few minutes pumping air (if
necessary for safety reasons: pumping an inert
gas).
 Install the pump at the highest point in the system.
 There is pressure on the pressure side, and at the same
time vacuum, or a pressure above atmospheric, on the
suction side:
 The pump is not designed for this condition.
 The cross-section of pneumatic lines, or connected com-
ponents is too small, or they are restricted:
 To measure the performance, disconnect the
pump from the system (small diameter tubing or a
valve can significantly affect performance).