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3.20 AUTOMATIC VENTING FUNCTION
In the case of new central heating systems and in particular mode for floor systems, it is very important that deaeration is performed cor-
rectly. The function consists of the cyclic activation of the pump (100 s ON, 20 s OFF) and the 3-way valve (120 s D.H.W., 120 s C.H.).
The function is activated by pressing buttons “
” + “
” at the same time for 5 seconds with boiler in stand-by.
If the boiler is connected to the CAR
V2
the “stand-by” function can only be activated via the remote control panel.
The function lasts for 18 hours and it can be stopped by simply pressing the button “
”.
Activation of the function is signalled by the countdown shown on the indicator (
).
3.21 SCREED HEATER FUNCTION
The appliance is equipped with a function to perform the thermal shock on new radiant panel systems, as required by the applicable
standard.
Contact the manufacturer of the radiant panels for the thermal shock characteristics and its correct execution.
To be able to activate the function there must be no remote control connected, while in case of system divided into zones it must
be properly connected, both hydraulically and electrically.
61
The function is activated from boiler in “off” by pressing and holding the “
”, “
” and “
” buttons for more than 5 seconds.
The function lasts in total 7 days, 3 days at the lower temperature set and 4 days at the higher temperature set (Fig. 61).
After activating the function, the lower set (range 20 ÷ 45 °C default = 25 °C) and the higher set (range 25 ÷ 55 °C default = 45 °C) appear in
sequence.
The temperature is selected by means of the buttons “
” and confirmed by pressing the button “ ”.
The display now shows the countdown of days alternated with the current flow temperature, as well as the normal operating symbols of
the boiler.
In case of failure or lack of supply voltage, the function is suspended and will resume when the normal operating conditions are reset
from the point where it was interrupted.
When the time expires, the boiler automatically goes back to “Stand-by” mode, the function can also be stopped by pressing the button “
”.
