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Frost thermostat
(230V rating)
T
T
Fig. 6.28
6.12 Installation of the external tem-
perature probe (optional)
The external probe must be installed on the
external wall of the building avoiding:
• Direct radiation of solar rays.
• Humid walls or walls subject to the formation
of mildew.
• Installation near to fans, drain outlets or
chimneys.
6.13 Electric connection between the
boiler and the external probe
To connect the external probe to the boiler use
electric cables with a section no less than 0.50
mm
.
2
The electric cables for connecting the ex-
ternal probe to the boiler must cover dif-
ferent channels to the voltage ones (230
V), since they are powered at a safety low
voltage and their maximum length must
not exceed 20 meters.
Use the clamps indicated in Fig. 6.29 to con-
nect the external probe.
- 62 -
INSTALLATION
Room
thermostat
with anticipating
resistor
(230V rating)
N
L
3
2
1
Remote
External
Probe
Electric
power supply
Ambient
thermostat
Fig. 6.29
The route of the external probe's connection
wires must follow the route indicated in Fig.
6.18.
Allow the cables to exit the boiler by using the
relevant cable clamps Z (Fig. 6.19).
6.14 Remote electric connection
(optional)
Use the clamps indicated in Fig. 6.29 to con-
nect the remote.
To connect the remote control to the boiler, re-
fer also to the REMOTE CONTROL booklet.
Do not remove the electric jumper con-
nected on the ambient thermostat terminal
block between "1 and 3" Fig. 6.29.
The route of the remote control cable must fol-
low the route indicated in Fig. 6.18.
Allow the cables to exit the boiler by using the
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