Start-Up; Electrical Connection - FLYGT PX SERIE Instrucciones De Instalacion Y Uso

en

6. Start-up

The noise generated by a properly installed pump operating within the specified range is as shown in the
following table:
2-POLE MOTOR POWER
POWER
Up to 3 kW
4 kW
From 5.5 to 7.5 kW
From 11 to 15 kW
* Measured equivalent (A) continuous acoustic pressure level at a distance of one meter from the pump in an open field.

6.1 Electrical connection

N.B.: The PX pumps use single- or three-phase motors sized and powered according to European standards.
DANGER
DANGER
RISK OF
ELECTRIC SHOCK
6.1.1 Overload protections
a) Single-phase motors
The single-phase motors have an incorporated thermal protector, except for the 2,2 kW motors, for
which we recommend the use of a control box.
b) Three-phase motors
WARNING
6.2 Priming
WARNING
FILL AND BLEED
PLUG
DRAIN PLUG WITH
PIN
20
4-POLE MOTOR
POWER
Up to 2.2 kW
–
–
–
The motor must be connected by a qualified electrician in compliance with current
electrical regulations. Ensure that the mains voltage corresponds to the voltage
specified on the motor rating plate. To facilitate the connection, the terminal board
can be positioned in one of the 4 positions at 90°. To obtain the best position for the
connection of the supply cables, remove the 4 motor/adapter fastening screws and
rotate the motor to the required position. Then re-install and tighten the 4 screws.
Remove the connection box cover and connect as shown on the back of the cover
and in fig. 4A or 4B.
The motor must be grounded prior to carrying out any other operations.
We recommend the use of a high-sensitivity differential switch (0.03 A) as extra
protection against electrical shock in case of inefficient grounding.
The three-phase motors must be protected from overloads by a suitable remote
overload cutout to protect them from phase failure and excessive voltage fluctu-
ations. The thermal relay must be set to the rated current or working current if
the motor is not uses at full load.
For priming, the pump and suction piping must be filled with liquid before start-
up, as per sections 6.3 and 6.4. On the PX2 and PX4 models the drain plug pin
must be unscrewed all the way without forcing it (fig. 5a).
FIG.5
ACOUSTIC PRESSURE
LEVEL (*)
Less than 70 dB(A)
71 dB(A)±2 dB(A)
75 dB(A)±2 dB(A)
80 dB(A)±2 dB(A)
DRAIN PLUG WITH
PIN OPEN
FIG.5a
ACOUSTIC POWER
LEVEL
80 dB(A)±2 dB(A)
85 dB(A)±2 dB(A)
90 dB(A)±2 dB(A)
DRAIN PLUG WITH
PIN CLOSED
FIG.5b