Electrical Supply Sizing
The following table shows the specification for a boiler installed on three phase single phase 3x400V+N~.
Rated output of boiler
Supply current
RCD rating
Minimum cable size
The following table shows the specification for a boiler installed on single phase 230V~ supply.
Rated output of boiler
Supply current
RCD rating
Minimum cable size
* The standard configuration of the boiler only allows a maximum of 12kW when connected SINGLE-PHASE 230V~.
Connection to Boiler
WARNING: Touching live connections can cause serious personal injury.
Before establishing a mains connection switch off the power supply. Secure the power supply against being switched on again.
Mains connection terminals remain live even if the on/off switch is turned off.
The boiler is delivered ready for operation on 3x400V three phase supply. For operation on 230V single phase the bridging
connection supplied must be connected across the terminals of the connection block as shown.
The terminal connection block is accessed after removing the boiler front panel . The supply cable should be safely routed to
this point through the cable entry point on the right hand bottom of the boiler.
CAUTION: A mains voltage at the incorrect plug terminal can destroy the electronics.
i
Make sure the connectin cables are securely fastened to the plug terminals.
4kW
5kW
6kW
7kW
13.0A
13.0A
13.0A
13.0A
16A
16A
16A
16A
4mm
4mm
4mm
4mm
4kW
5kW
6kW
7kW
17.4A
21.7A
26.1A
30.4A
20A
25A
32A
32A
4mm
6mm
10mm
10mm
8kW
9kW
10kW
11kW
13.0A
13.0A
21.7A
21.7A
16A
16A
25A
25A
4mm
4mm
6mm
6mm
8kW
9kW
10kW
11kW
34.8A
39.1A
43.5A
47.8A
40A
50A
50A
50A
10mm
16mm
16mm
16mm
28
12kW
13kW
15kW
18kW
21.7A
21.7
21.7A
26.0A
25A
25A
25A
32A
6mm
6mm
6mm
10mm
12kW
13kW
15kW
18kW
52.2A
56.5A*
65.2A*
78.3A*
63A
63A*
80A*
80A*
16mm
25mm
25mm
35mm