Installation instructions
33
USER INTERFACE:
The front display of the board provides direct reading of the temperature and operating status of the boiler; you may
use the keyboard to scroll the screens to check the operating conditions according to the following writings:
1 “
Solar Panels
” is the temperature measured at the solar panel flow.
2 “
Solar Exchanger
” is the temperature at the low point of the double coil boiler or of the combined boiler (TANK in TANK) or of
the storage tank (PUFFER) also called Solar Heat Exchanger because it is normally at the low point.
3 “
Boiler Temp.
” is the temperature available in the DHW storage tank; for the combined boiler (TANK in TANK) or storage tank
(PUFFER) it measures the heat available for the heating system.
4 “
Boiler Temp.”
is the boiler flow temperature.
5 “
Boiler Ret.”
is the boiler return temperature.
6 “
Flue gas Temp.”
is the combustion flue gas outlet temperature.
Display procedure:
The screens can be scrolled by using the direction arrows
and
present on the panel.
Boiler temperature adjustment procedure:
The temperature of the boiler can be adjusted by pressing the key
for about 1-2 seconds; a beep confirms the operation and
the displayed views the set value. By using the direction arrows
and
on the panel, you may change the value; after about
10 seconds without pressing any key, another beep will confirm that the new value has been memorised and you will return to the
normal display.
Unical
20 21.0
Luminous main switch (green)
Fan start key
Control unit RESET key
Safety thermostat reset key
Summer / winter key
USING THE KEYS:
Boiler functions adjustment MENU key
Functions value increase key
Functions value decrease key
Key changing priority domestic hot water /
heating
Boiler maximum temperature alarm silencing
(safety thermostat triggered)
fig. 28
