FORCE W
External probe (optional)
Connect the probe to the respective terminals. The maximum permissible length of the electric cable connecting the
boiler - external probe is 50 m. A common 2-wire cable can be used. The external probe should preferably be installed
on the North, North-West wall or on the wall facing most of the main living-room. The probe must never be exposed to
the early morning sun, and in general (as far as possible) it should not be exposed to direct sunlight; protect it if neces-
sary. In any case, the probe must not be installed near windows, doors, vents, flues or heat sources that could affect
the reading.
Accessing the electrical terminal block
The electrical terminal block can be accessed after removing the front panel. Make the electrical connections as shown
in the wiring diagram at fig. 73 and fig. 74.
The output relay of the heating circulating pump (32 of fig. 73 and fig. 74) has a
B
capacity of 8A@230Vac.
The output relays of the diverter valve (95 of fig. 73 and fig. 74) have a capacity of
5A@230Vac.
In case of loads with higher absorption, supporting relays with respective additional
protection must be installed.
EN
fig. 51 - Inadvisable positioning of external probe
fig. 52- Electrical terminal block
cod. 3541Q760 - Rev. 00 - 02/2019
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