7
Location of connections:
- the 230 V supply lead and room thermostat inputs
must be fitted on the wall at the height specified
on the fitting template
• the boiler is supplied with 230 V by a twin and
earth lead supplied with the appliance
• room thermostat (TA): prepare a free length of
at least 50 cm where the TA lead meets the
wall
Access to the boiler room thermostat connec-
tion:
- the room thermostat is connected behind the boi-
ler control unit
Regulations:
- in accordance with the regulations, an all-pole iso-
lating device with a contact opening gap of at least
3 mm must be installed in the boiler's stationary
power supply installation
- the boiler must be connected to a fixed junction
box using the cable supplied
230 V and earth connection via the lead provided at J1
Important: If the power supply cable is damaged, it should be replaced by the manufacturer, the after-sales service or
a person with a similar status, in order to avoid potential danger.
Room thermostat connection
When it leaves the factory, the boiler is set to operate without a room thermostat: a shunt
S
is fitted on connector
D
. A room
thermostat can be connected to this connector
- lower the electronic control unit by releasing the side locking pins
P
, to gain access to the rear side
- remove screws
B
and cover
C
(fig. 10)
The room thermostat connection can then be accessed.
- remove connector
D
- connect the thermostat in place of shunt
S
- reconnect connector
D
Connector
J12
shown (fig. 11) is ready to connect an optional programmer (refer to the relevant instructions if necessary).
6. Electrical connections
P1
P2
ON OFF
A1
A2
A3
A4
B1
B2
B3
B4
P3
S
T
D
J12
J1
J12
E
J1
P1
A1
A2
A3
A4
B1
B2
B3
B4
E
Cylinder
thermistor
System
System Plus
Shunt between
1 and 2
Shunt between
2 and 3
thermistor tank
Fig. 11
230 V 2P
+ E lead
B
C
P
P
Fig.10
