Xylem LOWARA e-SV Series, Installation, Operation And Maintenance Manual

Page: 23 / 48

en - Original instructions
e-SV series - Installation, Operation and Maintenance Manual 23
4.4.3 Guidelines for the control electric panel
NOTICE:
The electric panel must match the ratings on the unit data plate. Improper combinations could
damage the motor.
1. Install appropriate devices for protecting the motor from overloads and short circuits:
Motor Safety features
Standard single phase, ≤
1.5 kW

Automatic reset thermal-ampere protection, in-built (motor
protector)

Short circuit, must be supplied by the installer.
1
Three-phase and other
single-phases
2

Thermal, must be supplied by the installer

Short circuit, must be supplied by the installer.
2. Fit a system for protection against dry running to which to connect a pressure switch, or a
float, probes or other suitable devices.
3. Install these devices on the suction side:

A pressure switch, in the case of connection to the mains water supply

A float switch or probes, in the case of liquid drawn from a tank or basin.
4. When thermal relays are used, the type sensitive to phase failure is recommended.
4.4.4 Motor guidelines
If using a motor other than the standard motor, check that a thermal protection device has
been installed.
WARNING: Injuries hazard
The unit, equipped with a single-phase motor with automatic reset thermal overload
protection, could restart inadvertently after it has cooled down: risk of physical injury.
WARNING:
The use of units with single-phase motors with automatic reset thermal protection for
extinguishing fires and in pulverised water firefighting systems is forbidden.
NOTICE:
Only use dynamically balanced motors with half-sized key at the shaft end (IEC 60034-14), and
with normal vibration rate (N).
NOTICE:
Only use single-phase or three-phase motors with sizes and powers in compliance with
European standards.
NOTICE:
The mains voltage and frequency must match the specifications on the data plate.
1
Fuses aM (motor starting), or magneto-
thermal switch with curve C and Icn ≥ 4.5 kA or other equivalent device
2
Trip class 10 A overload thermal relay + aM fuses (motor start), or start class 10 A motor protection thermal magnetic switch