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31-CONNECTIONS
• Puer thermostat
To activate this option, connect a Normally Open (N.O.) contact thermostat to points 1 and 2 of the back 9 pole terminal board.
Even with this conguration the purpose of the room probe on the stove is only to control the heating system pump controlled by the
potential free contact on terminals 7-8-9.
Connections table.
TERMINAL NO. NAME ON BOARD FUNCTION
1-2 NTC2 HIGH PUFFER PROBE - PUFFER THERMOSTAT
3-4 NTC1 ROOM PROBE - ROOM THERMOSTAT
5-6 NTC3 STORAGE TANK PROBE - STORAGE TANK THERMOSTAT-
MEDIUM PUFFER PROBE
7-8-9 AUX RELAY (Potential-free-contact -Maximum
contact voltage - 24V AC/DC)
7 - NORMALLY CLOSED
8 - NORMALLY OPEN
9 - COMMON
10-11-12 3-WAY RELAY (Mains voltage contacts) POS.10 - DHW (F)
POS.11 - COMMON (N)
POS.12 - HEATING (F)
To access terminal block W”, remove the cap as reported in part 1 of the manual (in the paragraph devoted to the removal of the back
panel). Then loosen the
two screws “z” and take out
terminal block “W”. Perform
the necessary connections and
place everything back.
The NTC probes must be 10 K Ω
B3435, the thermostats must
have a dry contact.
48


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