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ENGLISH
• Incorrect impeller rotation (three pha-
se motor) = check direction of rotation
• Pump is not primed correctly = repeat
the "pump priming" procedure
• For self-priming pumps only: the in-
ternal valve has not closed = gradually
close a valve until there is a visible in-
crease in pressure or flow. Then open
the valve gradually until the required
flow rate is reached.
Pump performance is unstable
• Pump suction pressure too low or
cavitation = check the pump inlet
conditions
• Suction pipe is partially obstructed
with impurities = clean the suction
pipe
• Leak from suction pipe = repair or
replace suction pipe
• air in suction pipe = bleed the suc-
tion pipe, repeat the "pump priming"
instructions
• +For self-priming pumps only: The
differential pressure inside the pump
is too low = gradually close a valve
until delivery pressure stabilizes and
the noise level is reduced
The pump rotates in the opposite direc-
tion when shut down
• Foot valve or check valve defective or
blocked in the open position = remove
and clean or replace the valves
• Leak from suction pipe = remove and
repair suction pipe
DISASSEMBLY AND
DISPOSAL
Before any intervention on the
pump, disconnect the electrical
mains. Ensure that the electrical
power supply cannot be restored inadver-
tently.
• Disconnect the pump electrically from
the system according to safety stan-
dards
• Open the tap nearest to the pump to
decrease the system's pressure
• Before disassembly, close the shut-
off valves on the delivery side, and if
present also close the shutoff valve on
the suction side.
Note the position of the filler
hole, which is also used as a
bleed point. Ensure that the liq-
uid on outlet cannot cause damage or
physical injury.
• Loosen the filler cap to reduce the
pressure of the liquid remaining be-
tween the two valves
• Remove the drain cap from the pump
body to completely empty the pump
This product or any part of the latter must
be disposed of in accordance with lo-
cal standards using the public or private
waste collection authorities as required.
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