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The thermostat must be insulation class II (
) or must be correctly connected to earth.
Connecting the zone valves controlled
by the ambient thermostat
Ambient
Thermostat
T
V
Zone valve
with micro contact
Fig. 6.22
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".
Be careful not to connect pow-
ered cables on clamps "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 R ( Fig. 6.18 ).
INSTALLATION
N
L
6.11
External frost protection
•
Connect the frost thermostat between ter-
minals 1 and 2 as shown in Fig. 6.23 or
Fig. 6.24 .
Do not connect live wires to terminals to
which the frost thermostat must be con-
nected.
Frost Thermostat
(230V rating)
T
T
Fig. 6.23
Frost thermostat
(230V rating)
T
T
Fig. 6.24
Room thermostat
(230V rating)
N
L
3
2
1
Room
thermostat
with anticipating
resistor
(230V rating)
N
L
3
2
1
- 45 -
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