7698967.01 (1-01/18)
34
INST
ALLER Section
(en)
11. ELECTRICAL CONNECTIONS
This machine is only electrically safe if it is correctly connected to an efficient earth system in compliance with current safety
regulations. Connect the boiler to a 230V single-phase earthed power supply using the supplied three-pin cable, observing correct
Live-Neutral polarity.
Use a double-pole switch with a contact separation of at least 3 mm.
When replacing the power supply cable, fit a harmonised “HAR H05 VV-F” 3x0.75 mm2 cable with a maximum diameter of 8 mm.
The 2A fast-blowing fuses are incorporated in the power supply terminal block (to check and/or replace the fuse, pull out the black
fuse carrier).
Rotate the control box downwards and access terminal blocks
M1
and
M2
, used for the electrical connections, by removing the
safety cover.
Make sure that the overall rated power input of the accessories connected to the appliance is less than 2A. If it is higher, install
a relay between the accessories and the electronic board.
Terminal block M1 is at high voltage. Before making connections, make sure the appliance is disconnected from the power
supply.
TERMINAL BLOCK M1
(observe the polarity
L -
N)
(L)
=
Live
(brown)
(N)
=
Neutral
(light blue).
=
Earth
(yellow-green).
(1) (2)
= contact for
Room Thermostat
.
TERMINAL BLOCK M2
Terminals 1 (back-lighting) - 2 (earth) - 3 (+12V):
connection
to wall-fitted Control Panel (low voltage).
Terminals 4 - 5 (common):
External Probe connection
(supplied as an accessory).
Terminals 6 - 5 (common):
2nd Auxiliary Probe (probes for solar plant, cascade system, etc.).
Terminals 7 - 5 (common):
1st Auxiliary Probe (probes for solar plant, cascade system, etc.).
Terminal 8:
not used.
Terminals 9-10:
Multifunction relay contact
If the appliance is connected to an underfloor system, install a limit thermostat to prevent the latter from overheating.
Use the relative cable grommets at the bottom of the boiler to thread the cables through to the terminal blocks.
11.1 CONNECTING THE ROOM THERMOSTAT
The connections in terminal block M1 are high voltage (230 V). Before making connections, make sure the appliance is
disconnected from the power supply. Respect polarity L (LIVE) - N (NEUTRAL).
To connect the Room Thermostat to the boiler, proceed as described below:
• switch off the boiler;
• access the terminal block
M1
;
• remove the jumper from the ends of contacts
1-2
and connect the wires of the Room Thermostat;
• switch on the boiler and make sure the Room Thermostat works correctly.
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