66
INSTALLER
USERMAINTENANCE TECHNICIAN
TECHNICAL DATA
3.21 SCREED HEATER FUNCTION
e boiler 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 re-
mote control connected, while in case of system divided
into zones it must be properly connected, both hydrauli-
cally and electrically.
61
e function is activated from
boiler in “o” by pressing and
holding the “ ”, “ ”
and “ ” buttons for more
than 5 seconds.
e function lasts in total 7 days, 3 days at the lower temperature
set and 4 days at the higher temperature set (Fig. 61).
Aer activating the function, the lower set (range 20 ÷ 45 °C de-
fault = 25 °C) and the higher set (range 25 ÷ 55 °C default = 45 °C)
appear in sequence.
e temperature is selected by means of the buttons “ ” and
conrmed by pressing the button “ ”.
e display now shows the countdown of days alternated with the
current ow temperature, as well as the normal operating symbols
of the boiler.
In case of failure or lack of supply voltage, the function is suspend-
ed and will resume when the normal operating conditions are re-
set 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 “ ”.
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