BOARD KEY
The additional board o ers the boiler the possibility to manage various types of system, with maximum four heating areas, one domestic hot water storage tank or instant heat exchanger
and an eventual pu er. When the additional board has been connected to the boiler, the menus available will be displayed automatically. All additional board control operations will be
carried out via the boiler display.
I4B
I4A
I5
I6
I7
I4A
I4B
NF
Neutral and phase
OUT1/N
230 V 50 Hz output area 1 for heating (max. 5A)
OUT1/N
230 V 50 Hz output area 2 for heating (max. 5A)
OUT3/N
230 V 50 Hz output area 3 for heating (max. 5A)
OUT4/N
230 V 50 Hz output area 4 for heating or pu er pump (max 5 A)
230 V 50 Hz output (max. 5A) normally closed of the domestic hot water storage tank
05NC/N
05NO/N
230 V 50 Hz output (max. 5A) normally open of the domestic hot water storage tank
O6 NO/O6C
auxiliary output normally open
O6 NC/O6C
auxiliary output normally closed
I1/GND
area 1 input (potential free contact)
I2/GND
area 2 input (potential free contact)
I3/GND
area 3 input (potential free contact)
I4A/GND
area 4 input (potential free contact)
I4B/GND
Future preparation
I5/GND
boiler probe/heat exchanger input
I6/GND
upper pu er probe inlet
I7/GND
lower pu er probe inlet
OC
power line connection (+ = red, - = black)
The status of the inputs and outputs are visible from the respective LEDs. They are divided into LEDs that
concern the inputs (I1 to I7) and LEDs that concern the outputs (OUT1 to OUT5). When an input receives
a request, the relative LED lights up and the probe LED ashes. When the request can be satis ed (if the
boiler has the necessary conditions) then the LED of the output of interest also switches on.