Hydraulic Installation; Electrical Installation; Electrical Requirements - Xylem LOWARA e-SVE Traducción De Las Instrucciones Originales

4.2

Hydraulic installation

Figure 9 and 10 show a single pump system and a
multi-pump system respectively. See the Quick
Startup Guide instructions (code 001080128).
NOTE:
If the system is directly connected to the
water network, install a minimum pressure
switch on the suction side.
4.3

Electrical Installation

DANGER: Electrical hazard
The connection to the electric power supply
must be completed by an electrician
possessing the technical-professional
requirements outlined in the current
regulations.
4.3.1

Electrical requirements

Local directives prevail on the specific requirements
indicated below.
Electrical connection check list
Check that the following requirements are met:
• The electrical leads are protected from high
temperature, vibrations, and collisions
• The current type and voltage of mains connection
must correspond to the specifications on the data
plate on the pump
• The power supply line is provided with:
− A high-sensitivity differential switch (30 mA)
[residual current device RCD] suitable for earth
fault currents with DC or pulsating DC content (a
Type B RCD is suggested).
−
A mains isolator switch with a contact gap of at
least 3 mm.
Electric control panel checklist
NOTE:
The control panel must match the ratings of
the pump unit. Inappropriate combinations do
not guarantee the protection of the unit.
Check that the following requirements are met:
• The control panel must protect the pump against
short-circuit. A time lag fuse or a circuit breaker
(Type C model is suggested) can be used to protect
the pump
• The pump has built in overload and thermal
protection, no additional overload protection is
required.
DANGER: Electrical hazard
Before starting work on the unit, make sure
that the unit and the electric panel are
isolated from the power supply and cannot be
energized.
Grounding (earthing)
DANGER: Electrical hazard
• Always connect the external protection
conductor to the ground terminal before
attempting to make any other electrical
connections
• Connect all the electric accessories of the
pump and the motor to the ground, making
sure that the connections are completed
correctly
• Check that the protection conductor
(ground) is longer than the phase
conductors; in case of accidental
disconnection of the power supply
conductor, the protection conductor
(ground) must be the last one to detach
itself from the terminal.
Use a cable with several strands to reduce electric
noise.
4.3.2 Wire types and ratings
• All cables must comply with local and national
standards in terms of section and ambient
temperature
• Use cables with minimum heat resistance +70°C
(158°F); to ensure compliance with UL
all power supply connections must be completed
using the following types of copper cables with
minimum resistance +75°C: THW, THWN
• Cables must never enter into contact with the motor
body, the pump and the piping
• The wires connected to the power supply terminals
and the fault signal relay (NO, C) must be separated
from the others by means of reinforced insulation.
Electric connection cables
Power supply input
cable + PE
Wires Wire
number x numbers
Max. x Max.
copper AWG
Section
[mm
2
(sq.in)]
103 3x1.5 3x15
105 (3x0.0023)
107
111
115
303 4x1.5 4x15
305 (4x0.0023)
307
311
315
322
4 Underwriters Laboratories
en – Original Instructions
4 regulations,
Tightening torque
Mains and Earth
motor Conductor
cable [Nm
terminals (lb.in)]
[Nm (lb.in)]
Spring Spring
connectors connectors
0.8 3
(7.1) (26.6)
15