Room thermostat (optional)
ATTENTION: THE ROOM THERMOSTAT MUST HAVE
B
VOLTAGE-FREE CONTACTS. CONNECTING 230V TO
THE ROOM THERMOSTAT TERMINALS WILL PERMA-
NENTLY DAMAGE THE PCB.
When connecting a time control or timer, do not take the
power supply for such devices from their cutoff contacts.
Their power supply must be via a direct connection from
the grid or with batteries, depending on the kind of device.
Accessing the electrical terminal block and fuse
After removing the front panel ( *** 'Opening the front panel' on page 279 ***) it is possible to ac-
cess the terminals. Terminals 1-2 and 5-6, indicated in fig. 19, must be with voltage-free con-
tacts (not 230V). The arrangement of terminals for the various connections is also given in the
wiring diagram in fig. 60.
250
EN
138
A
fig. 19
cod. 3540000251 - Rev. 00 - 03/2024
ALHENA C
5
6
72
139