Installation Of The External Temperature Probe; Electric Connection Between The Boiler And The External Probe - Biasi BASICA COND User Manual And Installation Instructions

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. 6.18
Use the room thermostat cable indicated
in Fig. 6.17 to connect the zone valve. The
electric conductors on the zone valve micro
contacts must be connected to the ambi-
ent thermostat cable wires as shown in Fig.
6.18.
Do not connect live wires to ter-
minals to which the room ther-
mostat must be connected.
6.11 Installation of the external
temperature probe
(optional)
The external probe must be installed on the
external wall of the building avoiding:
• Direct sunlight.
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INSTALLATION
N L
• Humid walls or walls subject to the forma-
tion of mildew.
• Installation near to fans, drain outlets or
chimneys.
• It is recommended to be installed on a
north aspect wall at least 1 m below any
eaves and at least 2 m above ground.
6.12 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
external probe to the boiler must cover
different channels to the voltage ones
(230 V), since they are powered at a safe-
ty low voltage and their maximum length
must not exceed 20 meters.
Use the control board terminals indicated in
Fig. 6.19 to connect the external sensor.
The external sensor connection wires must
follow the path indicated of the ambient
thermostat and come through the back of
the boiler.
Boiler side
Volt-free contacts for the
ambient thermostat
External
sensor
Fig. 6.19