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Connecting the zone valves controlled
by the ambient thermostat
Ambient
Thermostat
T
V
Zone valve
with micro contact
Fig. 6.22
Ambient
Thermostat
T
V
Zone valve
with micro contact
Fig. 6.23
If the Ambient Thermostat is
connected with live wires (Fig.
6.23) may lead dangerous volt-
age inside the appliance as well.
Ensure they are isolated.
In case of doubt turn off the gen-
eral system switch.
INSTALLATION
L
N
L
N
Use the ambient thermostat's clamps indi-
cated in Fig. 6.16 and Fig. 6.17 to connect
the zone valve. Insert the electric cables of
the zone valve's micro switch contacts in
clamps "1 and 3" of the ambient thermo-
stat's terminal block as in Fig. 6.17.
Remove the electric jumper between "1
and 3".
The route of the boiler and ambient thermo-
stat's electric power supply cable or wires
must follow the route indicated in Fig. 6.17.
Allow the cables to exit the boiler by using
the relevant cable clamps "P" (Fig. 6.18).
6.11 External frost protection
• Connect the frost thermostat between ter-
minals 1 and 2 as shown in Fig. 6.24, Fig.
6.25 or Fig. 6.25.
Do not connect live wires to terminals to
which the frost thermostat must be con-
nected.
Frost Thermostat
(230V rating)
T
T
Fig. 6.24
Room thermostat
(230V rating)
N
L
3
2
1
- 45 -
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