Installation And Operating Instructions - Grundfos IO 50 SQFlex Instrucciones De Instalación Y Funcionamiento

English (GB) Installation and operating instructions
Original installation and operating instructions.
1. Applications
The IO 50 SQFlex switch box is made for solar-powered SQFlex systems
and is an on/off switch for the system power supply.
In addition, the IO 50 functions as a connection point for all necessary
cables.
By means of the on/off switch, it is possible to
• start/stop the pump
• reset alarms.
The electrical connection and protection must be carried out in accordance
with local regulations.
2. Installation
Warning
Before starting any work on the IO 50, make sure that the
power supply has been disconnected and that it cannot be
accidentally connected.
2.1 Mechanical installation
The IO 50 SQFlex must be placed on a firm and stable surface that fits the
box.
2.2 Electrical connection
The electrical connection must be carried out by an authorised electrician in
accordance with local regulations.
Two typical wiring diagrams are shown on page 20:
• one DC conductor earthed (fig. 1)
• floating DC supply or AC connection (fig. 2).
Position of wire jumpers
Wiring
One DC conductor earthed
Floating DC supply
6
Place the wire jumpers between
1L1 - 3L2 5L3 - 7L4 4T2 - 6T3
1L1 - 7L4 3L2 - 5L3 -