DAYLIFF D3SP Installatie- en bedieningshandleiding - Pagina 14
Blader online of download pdf Installatie- en bedieningshandleiding voor {categorie_naam} DAYLIFF D3SP. DAYLIFF D3SP 16 pagina's. Submersible borehole pumps
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The water level electrodes
or level switches have not
been installed correctly
Frequent
starts and
stops
The non-return valve is
leaking or stuck half open
The pump is oversized for
borehole
Riser pipe leakage
Long
period until
water flow
after start
Pump NRV faulty
Loud noise
in the
Water hammer
pipework
Pump cavitation due to low
Mechanical
system head resulting in
damage to
operation at insufficient
pump and
pressure
motor
Adjust the intervals of the
electrodes to ensure suitable
time between the cutting-in
and cutting-out of the pump.
If the intervals
stop/start cannot be changed
automatically,
capacity may be reduced by
throttling the discharge valve
changed
Pull out the pump and clean
or replace the non-return
valve
Increase the installation
depth of the pump, throttle
the pump or replace it with a
smaller model to obtain a
smaller capacity
Check and repair riser pipe
Lift pump and rectify NRV
Fit a surface non-return valve
and a diaphragm tank on
the surface delivery piping
Throttle the pump or replace
it with a lower pressure
alternative
13
between
the pump