![Xylem Lowara Scuba Скачать руководство пользователя страница 19](http://html.mh-extra.com/html/xylem/lowara-scuba/lowara-scuba_additional-installation-operation-and-maintenance-instructions_892236019.webp)
en – Original instructions
SCUBA – Additional Installation, Operation and Maintenance Instructions
19
4.4
Electrical connection
DANGER:
All the hydraulic and electrical connections must be completed by a technician possessing the
technical-professional requirements outlined in the current regulations.
DANGER: Electrical hazard
Before starting work, check that the unit is unplugged and that the pump unit, the control
panel and the auxiliary control circuit cannot restart, even unintentionally.
4.4.1
Ground
DANGER: Electrical hazard
Always connect the external protection conductor (ground) to the ground terminal before
attempting to make any other electrical connections.
DANGER: Electrical hazard
Connect the pump unit and any electric accessories to a socket with protection conductor
(ground).
DANGER: Electrical hazard
Check that the external protection conductor (ground) is longer than the phase conductors; In
case of accidental disconnection of the unit from the phase conductors, the protection
conductor must be the last one to detach itself from the terminal.
DANGER: Electrical hazard
Install suitable systems for protection against indirect contact, in order to prevent lethal electric
shocks.
4.4.2
Guidelines for electrical connection
1.
Check that:
•
The mains voltage and frequency match the specifications on the data plate
•
The power supply cord is protected from high temperatures, vibrations, collisions and
abrasions.
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
•
For use in swimming pools, garden ponds or similar, and only when inside there are no
people or animals, a residual current earth leakage switch (I
∆
N) ≤ 30 mA
•
If it is not possible to visually check the level of the liquid, install a system for protection
against dry run connected to a pressure switch (or float, probes, or other suitable
devices)
•
In case of permanent installation, install an RCCB earth leakage switch with tripping
current ≤ 30 mA.
Overtemperature protection - single-phase motor unit
DANGER: Electrical hazard
Connect the plug to a socket with protection conductor (earth).