Electrical Connection - Pentair NOCCHI MULTI EVO Series Instruction Manual

ENGLISH
It is recommended to fit a filter on the in­
let of the suction pipeline where the pump
is used for pumping water from a well or
tank used for the recovery of rain water.
Periodically check the condition
of the filter and regularly clean
or replace this element.
The pump is installed with positive suc­
tion head when it is located below the liq­
uid in suction. Figure 1
1. Shutoff valve
2. Check valve
3. Filler cap
The pump is installed with negative suc­
tion head when it is located above the liq­
uid to be received. Figure 2 (or Figure 3
only for self­priming pumps)
1. Shutoff valve
2. Optional check valve or control device
with internal check valve on delivery
line
3. Filler cap
4. Foot valve
5. Check valve on suction pipeline (Figure
3 only for self­priming pumps)
Correct pump installation is essential to
ensure priming.
• Position the pump in the vicinity of
the well or tank to ensure that the
suction pipe is as short as possible. In
this way, the priming time is reduced,
above all in the case of large differ­
ences in height between the liquid and
suction point.
• Use a pipeline that is at least the
same diameter as that of the pump
suction port. If the difference between
the liquid and suction point is more
than 4 meters, use a pipeline with a
larger section;
• To avoid the formation of air vortexes,
immerse the suction pipe by at least
18 18
0.5m in the liquid to be pumped (Fig­
ure 2, Figure 3 H1>=0.5m);
• Install a foot valve with filter at the
end of the suction pipe ( Figure 2) or
check valve on the suction port in the
case of self­priming pumps (Figure 3)
• Ensure complete sealing of the suc­
tion pipe;
• Use wide bends on the suction sec­
tion;
In the case of self­priming pumps ensure
that the minimum height H3 (between the
center of the suction port and the check
valve) or H4 (between the center of the
suction port and first point of use) in the
table1 are observed to guarantee suction
height H2 (Figure 3).
ELECTRICAL
CONNECTION
WARNINg:
• Ensure that the rated voltage and
frequency correspond to those of the
specifications of the mains power
available.
• The electrical connection must be
made according to current local
standards.
• Before any intervention on the pump,
disconnect the electrical mains. En­
sure that the electrical power supply
cannot be restored inadvertently.
• The electrical cables must be protect­
ed, in particular from high tempera­
tures, vibrations and impact, which
could cause mechanical or chemical
damage.
• The electrical power line must be
fitted with a short circuit protection