Maintenance - Pentair NOCCHI MULTI EVO Series Instruction Manual

5. If the direction of rotation is incorrect,
disconnect the electrical mains.
Ensure that the electrical po­
wer supply cannot be restored
inadvertently.
6. In the motor terminal board of the
three phase electrical pump or on the
electrical panel exchange the two pha­
ses of the power cable.
7. Check the direction of rotation again.
Pump start-up
Use the electric pump according
to the performance specifica­
tions as stated on the data plate.
Always avoid operation of the
pump with the upline shutoff
valve closed (suction side). Dry
running of the pump can lead to over­
hearing and damage to the pump itself.
Never run the pump with the
shutoff valve downline (delivery
side) completely closed. In this
case, the water in the system reaches
very high temperatures, with the risk of
damage to equipment and scalding in the
event of escape of the liquid. In this situa­
tion, turn off the pump and leave the sys­
tem to cool.
Never use the pump in the event
of cavitation, as this can cause
damage to the hydraulic compo­
nents.
Pressure on the downline side of
the pump (delivery side) must
never exceed the maximum op­
erating pressure PN as indicated on the
pump data plate (see "Application Limits"
Figure 5). Pressure downline of the pump
is obtained from the sum of the pressure
delivered and the pressure on the suction
side (gravity for installations with negative
suction head, aqueducts, or water system
where admissible or required).
1. Check that the shutoff valves downline
of the pump (delivery side) and upline
of the pump are in the open position.
2. Start the pump.
3. If the pump does not start up correctly,
on reaching the operating conditions in
a short time, the pump shuts down.
4. In this case repeat the "Pump priming"
phase.

mAINTENANCE

Before any intervention on the
pump, disconnect the electrical
mains. Ensure that the electrical
power supply cannot be restored inadver­
tently.
Refer to the "safety instructions".
• In normal conditions, the electric
pumps do not require any scheduled
maintenance.
• With a view to prevention of possible
faults, it is recommended to period­
ically check the pressure delivered
and current absorption. A reduction
in pressure is symptomatic of pump
wear. An increase in current absorp­
tion is symptomatic of abnormal
mechanical friction in the pump.
• Special maintenance may be required
to clean the pump and replace any
worn parts.
• If the pump is not used for prolonged
periods (e.g. for an entire season) it
should be drained completely rinsed
with clean water and stored in a dry
location.
ENGLISH
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