9
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 remove 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).
7. Electrical connections
B
C
P
P
Fig.10
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
