Xylem LOWARA e-SHE Series - Electrical Connection Best Practices; Control Panel Electrical Setup; Motor Electrical Considerations

en – Original Instructions
e-SHE, e-SHS
– Additional Installation, Operation and Maintenance Instructions 23
4.4.2 Guidelines for electrical connection
1. Check that the electrical leads are protected against:
• High temperature
• Vibrations
• Collisions.
2. Check that the power supply line is provided with:
• A short circuit protection device of appropriate size
• A mains disconnection device with contact opening distance ensuring complete
disconnection for overvoltage III category conditions.
4.4.3 Guidelines for the electrical control 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:
Protection
Motor
Notes
Single-
phase
Three-
phase
Automatic reset thermal-ampere protection
•
-
Built-in (motor
protector)
Thermal: trip class 10 A overload thermal relay + aM fuses (motor starting), or start
class 10 A motor protection thermal magnetic switch
-
•
To be supplied
by the installer
From short circuit: aM fuses (motor start-up), or thermal magnetic switch with C curve
and Icn ≥ 4.5 kA, or other similar device
•
•
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. On the suction side install:
• 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. If required, install phase failure sensitive thermal relays.
4.4.4 Guidelines for the motor
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).