Priming Of The Group; Electric Connection - Pentair NOCCHI FREQUENCY CHANGER Instrucciones Originales

CHAPTER 4

PRIMING OF THE GROUP

See fig.2
DANGER - ELECTRIC SHOCK RISK
Always shut off the voltage before proceeding to any operation.
WARNING
The group needs to be filled up before putting it in operation. The dry-operation of the motor pump damages
the hydraulic parts.
In case of aspiration with upper suction head, open storage, aqueduct or water pipe under pressure, prime the group as follows:
• Open all valves and remove the
priming plugs on the aspiration
collector and on the motor pumps
In the case where the group supply is with lower suction head, underground well or tank, prime the group as follows:
• Open all valves and to and remove
the priming plugs on the aspiration
collector and on the pumps
CHAPTER 5

ELECTRIC CONNECTION

See fig.3-4-5 and other schemes reported on the switchboard
WARNING
Check that the voltage and frequency indicated on the data plate correspond to those of
the available power grid.
DANGER - ELECTRIC SHOCK RISK
Check that the power supply is provided with an efficient ground installation which conforms with the
regulations in force.
WARNING
The power supply is equipped with differential circuit breaker with the sensitivity required by the regulations
in force for this type of equipment.
WARNING
Before connecting the power supply cable to the control board, check that it has sufficient dimensions to
support the maximum voltage required by group pumps.
WARNING
The connection of the distribution boards to the power grid must be done according to indications reported
on the electric connection scheme situated in the control board.
DANGER - ELECTRIC SHOCK RISK
The substitution of electric and electronic components must to be done by a skilled staff.
• Open the water supply on-off valve
until the evacuation of the liquid
• Fill with water through the suction
pipe
• Close again the feed faucet and the
pumping plugs
• Make the necessary topping-up
through the priming plugs on the
pump casing until complete filling-up
• Re assemble the plugs
GB
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