Pentair Flotec EVO-MULTIPRESS 340 50 DIGIPRESS, Руководство по эксплуатации и обслуживанию

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USE AND MAINTENANCE MANUAL
EN
25
THE PUMP STARTS AND STOPS FREQUENTLY
THE PUMP DOES NOT STOP
•
Leak from foot valve = clean or
replace the foot valve.
•
The pressure switch setting is
incorrect (too high) = adjust the
pressure switch to within the
pump pressure limits
•
air in suction pipe = bleed the
suction pipe, repeat the "pump
priming" instructions
PUMP PERFORMANCE IS REDUCED
PUMP PERFORMANCE IS UNSTABLE
THE PUMP ROTATES IN THE OPPOSITE DIRECTION WHEN SHUT DOWN
THE PUMP STARTS UP BUT DOES NOT DELIVER LIQUID
• Pipelines obstructed = check
pipelines
•
Pump is not primed correctly
= repeat the "pump priming"
procedure
•
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
•
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
• Pump is not primed = repeat the
"pump priming" procedure
•
The pump takes in air = check the
liquid level, operation of the foot
valve and the suction pipeline
• The foot valve is blocked in the
• For self-priming pumps only: the
internal valve has not closed =
gradually close a valve until there
is a visible increase in pressure
or replace suction pipe
•
air in suction pipe = bleed the
suction pipe, repeat the "pump
priming" instructions
•
+For self-priming pumps only:
The differential pressure inside
the pump is too low = gradually
•
The membrane inside the tank is
damaged = replace the internal
membrane of the tank
•
The gas pressure in the
expansion tank is incorrect with
respect to the pressure switch
setting = adjust the gas pressure
closed position = replace or clean
the valve
•
For self-priming pumps only:
The liquid column above the
check valve on the delivery
pipeline prevents self-priming
or flow. Then open the valve
gradually until the required flow
rate is reached.
close a valve until delivery
pressure stabilizes and the noise
level is reduced
to approximately the pump
intervention pressure minus 10%.
of the pump = drain the delivery
pipeline. Check that check valve
does not retain liquid in the
delivery pipeline. Repeat the
start-up procedure.