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3.17 SCREED HEATER FUNCTION.
The boiler is equipped with a function to perform the thermal
shock on new radiant panel systems, as required by the applicable
standard.
Attention:
contact the manufacturer of the radiant panels for the
thermal shock characteristics and its correct execution.
N.B.:
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.
The function is activated from boiler in OFF by pressing and
holding the buttons “Reset”, “Info” and “Stand-by” for more than
5 seconds
62
The function lasts in total 7 days, 3 days at the lower temperature
set and 4 days at the higher temperature set (Fig. 63).
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 sus-
pended 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 “
”.
63
3.18 “CHIMNEY SWEEP FUNCTION”.
When activated, this function forces the boiler to variable output
for 15 minutes.
In this state all adjustments are excluded and only the safety
thermostat and the limit thermostat remain active. To activate the
chimney sweep function, press the “
” button until activation
of the function in the absence of DHW requests.
Its activation on the boiler display is confirmed by the indicators
flashing at the same time (17 and 18 Fig. 47).
64
This function allows the technician to check the combustion
parameters.
Once the function is activated, it is possible to select whether to
make the chick in CH status or DHW status by opening any hot
water cock.
Using the buttons “
” you can select between three predefined
power levels:
- “0%”
- Max CH output (P2)
- Max DHW output (P0).
While by using the buttons “
” you can select the power from
0% to max DHW output (P0), with intervals of 1%.
The central heating or DHW operating mode is displayed by the
relative symbols
or
.
After the checks, deactivate the function by switching the indoor
unit off and then back on again.
DAYS
HIGHER
SET
LOWER
SET
