5
3.4
Electrical Connection
The boiler is equipped for connection at 230 V~, 50 Hz to terminals
1
and
2
of terminal strip
J1
(see
“
Electrical Connection Diagram
”).
Remember to earth the appliance.
The boiler has two terminal strips,
TA
1
(J5) and
TA
2
(J6) for connecting room thermostats or room
chronothermostats (see “
Electrical Connection Diagram
”) for remote control of heating circuits 1
and 2 respectively. To correctly connect the room thermostats, firstly remove the bridge joining the
terminals of terminal strip
TA
1
. For connection to
TA
2
, simply connect the thermostat to the
terminal strip.
IMPORTANT: Before carrying out any work on the boiler’s electrical installation, always ensure
it is disconnected from the mains.
IMPORTANT: To access the electrical connection terminal strip, remove the protection box
under the main board, as shown in the picture below.
3.5
Installing heating circuit 2 (Optional)
All the models in the
Evolution Solar HFD
range of boilers are supplied equipped with a circulation
pump connected to heating circuit 1 (BC
1
). In addition to this circuit, all the models are designed to
control a second heating circulation pump, in heating circuit 2 (BC
2
).
The hydraulic installation of heating circuit 2 should be made using the optional flow circuit (IC') on
the rear of the boiler (see "Diagrams and Measurements").
The circulation pump installed in heating circuit 2 must be electrically connected between
terminals N and 8 on supply connector block
J2
(see “Electrical Connection Diagram").
Remove the protective box to
access the terminal strip
