
- 33 -
INST
ALLA
TION
INSTALLATION
Connection of a room thermostat
The room thermostat must be connected to
the terminal block situated next to the con-
trol panel.
Any external controls and connection
lines must be rated at 230 V but under
no circumstances should external live
voltage be connected to the room ther-
mostat link on the boiler.
When connecting any type of external
control, the link Q in Fig. 6.13 must be
removed.
Fig. 6.13
Q
• Connect the room thermostat between ter-
minals 1 and 3 as shown in Fig. 6.14 or
Fig. 6.15.
Fig. 6.14
Power supply
terminal block
External controls
terminal block
T
Room thermostat
L
N
3 2
1
(230V rating)
Do not connect live wires to ter-
minals to which the room ther-
mostat must be connected.
Fig. 6.15
Power supply
terminal block
External controls
terminal block
T
Room thermostat
L
N
3
2 1
with delay resistor
(230V rating)
• Route the electrical supply flexible cord
and the external control flexible cord as
illustrated in Fig. 6.16. Lock the flexible
cords in place with the flexible cord clamps
Fig. 6.16
To the fused
spur isolation
switch
To the external
control device
It is not necessary to cut away the plas-
tic service panel to route the electrical
cords.