Electrical Requirements; Install The Pump; Electrical Installation - Lowara 1 HM Manuel D'installation, D'utilisation Et D'entretien

en - Translation of the original instructions
technicians and in compliance with
the regulations in force.
Piping checklist
• Pipes and valves must be correctly sized.
• Pipe work must not transmit any load or torque
to pump flanges.
For illustration that shows the piping requirements,
see Figure 5 .

4.2 Electrical requirements

• The local regulations in force overrule these
specified requirements. In the case of fire fight-
ing systems (hydrants and/or sprinklers), check
the local regulations
in force
.
Electrical connection checklist
Check that the following requirements are met:
• The electrical leads are protected from high
temperature, vibrations, and collisions.
• The power supply line is provided with:
• A short-circuit protection device
• A high-sensitivity differential switch (30 mA)
[residual current device RCD] to provide
more protection against electric shock.
• A mains isolator switch with a contact gap of
at least 3 mm
The electrical control panel checklist
NOTICE:
The control panel must match the ratings of the
electric pump. Improper combinations could fail to
guarantee the protection of the motor.
Check that the following requirements are met:
• The control panel must protect the motor
against overload and short-circuit.
• Install the correct overload protection (thermal
relay or motor protector).
Pump Type
Single phase standard
electric pump ≤
2.2 kW
Three-phase electric
4
pump
• The control panel must be equipped with a dry-
running protection system to which a pressure
3
fuses aM (motor starting), or magneto-thermal switch with curve C and Icn ≥ 4.5 kA or other equivalent device
4
Overload thermal relay with operation class 10 A + fuses aM (motor starting) or motor protection magneto-thermal
switch with operation class 10 A.
10
Protection
• Built-in automatic
reset thermal-am-
perometric protec-
tion (motor protec-
tor)
• Short circuit pro-
tection (must be
supplied by the in-
3
staller)
• Thermal protection
(must be supplied
by the installer)
• Short circuit pro-
tection (must be
supplied by the in-
staller)
switch, float switch, sensors, or other suitable
device is connected.
• The following devices are recommended for
use on the suction side of the pump:
• When the liquid is pumped from a water sys-
tem, use a pressure switch.
• When the liquid is pumped from a storage
tank or reservoir, use a float switch or sen-
sors.
• When thermal relays are used, relays that are
sensitive to phase failure are recommended.
The motor checklist
Use cable according to rules with 3 leads (2+earth/
ground) for single phase versions and with 4 leads
(3+earth/ground) for three-phase version.

4.3 Install the pump

4.3.1 Install the pump on a concrete
foundation
For information about how to install the pump, see
Figure 5 .
1. Piping support
2. On-off valve
3. Flexible pipe or joint
4. Check valve
5. Control panel
6. Do not install elbows close to the pump
7. Bypass circuit
8. Eccentric reducer
9. Use wide bends
10. Positive gradient
11. Piping with equal or greater diameter than the
suction port
12. Use foot valve
13. Do not exceed maximum height difference
14. Ensure adequate submersion depth
1. Anchor the pump onto the concrete or equiva-
lent metal structure.
• If the liquid temperature exceeds 50°C, the
unit must be anchored only by the motor
bracket side and not also by the side of the
inlet supporting bracket
• If the transmission of vibrations can be dis-
turbing, then provide vibration-damping
supports between the pump and the foun-
dation.
2. Remove the plugs covering the ports.
3. Assemble the pipe to the pump threaded con-
nections.
Do not force the piping into place.

4.3.2 Electrical installation

Precautions
Electrical Hazard:
• Make sure that all connections are
performed by qualified installation
technicians and in compliance with
the regulations in force.
• Before starting work on the unit,
make sure that the unit and the con-