PRODUCT FUNCTIONALITY
30
Chapter7
The boiler is arranged to receive certain supplementary external thermostats which allow to adapt and
adjust the functioning of the same, in relation to the plant requirements.
The “Winter”, “DHW Winter” and “Summer” functioning modes are for the use of thermostats. If thermostats
are not used, in any mode, machine functioning will remain the same. The external thermostats will be
connected to the terminal board located in the boiler rear part.
It is the installer’s responsibility to check the adequate earthing of the supplementary device applied on
the boiler. If necessary, provide an additional earthing. Pay particular attention to avoid cables coming into
contact with parts in temperature.
On the tank rear wall, immediately above the terminal board, there are 4 holes to x the provided cable
glands inside the accessories bag.
THERMOSTAT RELATIVE OUTLET CONTACT MEANING DISPLAY
INP 1 (T1) OUT 4
Closed Heat request t1 o in display D2
Open No heat request t1 on in display D2
INP 2 (T2) OUT 3
Closed Heat request t2 o in display D2
Open No heat request t2 on in display D2
ING1 (T1) D connection input between clamps ING1 and COM of the terminal board
ING2 (T2) D connection input between clamps INP2 and COM of the terminal board
The outputs status indicated in the table below and successively are only to be considered valid
with the pump working (stove water temperature > anti-condensate threshold).
Functioning with standard con guration as set in the factory
WINTER MODE
State of Clamps State of outputs Boiler status
INP1 and INP2 closed
(jumpered as in the
factory)
OUT4 active (230 V, 50 Hz)
OUT3 active (230 V, 50 Hz)
Boiler on
MODE SELECTION
gure 7.2
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