Ferroli ATLAS 25 SI UNIT Instrucciones De Uso, Instalación Y Mantenimiento página 40

Boiler lighting
• Open the fuel shut-off valves.
• Switch on the power to the unit.
fig. 6 - Boiler lighting
• For the following 120 seconds the display will show FH which identifies the heating
system air venting cycle.
• During the first 5 seconds the display will also show the card software version.
• When the message FH disappears, the boiler is ready to operate automatically
whenever domestic hot water is drawn or in case of a room thermostat demand.
Turning the boiler off
Turn both knobs (details 1 and 2 - fig. 1) to minimum.
fig. 7 - Turning the boiler off
When the boiler is turned off, the PCB is still powered.
Domestic hot water and heating are disabled. The frost protection system remains acti-
vated.
To turn the boiler on again, turn both knobs (details 1 and 2 - fig. 1) to the desired tem-
perature.
The boiler will be immediately ready to operate whenever domestic hot water is drawn
or in case of a room thermostat demand.
2.4 Adjustments
Summer/Winter Switchover
Turn the Heating knob (detail 1 - fig. 1).
The boiler will only deliver domestic hot water. The frost protection system remains acti-
vated.
To deactivate the Summer (Winter) mode, turn the Heating knob (detail 1 - fig. 1) to the
desired temperature.
EN
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fig. 8
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fig. 9
cod. 3541I320 - Rev. 01 - 10/2016
Heating temperature adjustment
Operate the Heating knob (detail 1 - fig. 1) to adjust the temperature from a min. of 30°C
to a max. of 80°C.
It is advisable not to operate the boiler below 45°C.
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DHW temperature adjustment
Operate the DHW knob (detail 2 - fig. 1) to adjust the temperature from a min. of 50°C to
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a max. of 75°C.
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Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature desired in the rooms. If the room ther-
mostat is not installed the boiler will keep the heating system at its setpoint temperature.
Room temperature adjustment (with optional remote timer control)
Using the remote timer control, set the temperature desired in the rooms. The boiler unit
will set the system water according to the required room temperature. For information on
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the remote timer control, please refer to its user's manual.
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ECO/COMFORT selection
The unit has a function that ensures a high domestic hot water delivery speed and max-
imum comfort for the user. When the device is activated (COMFORT mode), the water
contained in the boiler is kept hot, thereby ensuring immediate availability of hot water
on opening the tap, thus avoiding waiting times.
The device can be deactivated by the user (ECO mode) by pressing the reset button (de-
tail 3 - fig. 1). The Comfort symbol (detail 8 - fig. 1) will be deactivated and the display
will show "EC" (ECO) for 3 seconds.
To activate the COMFORT mode, press the reset button (detail 3 - fig. 1). The Comfort
symbol (detail 8 - fig. 1) will be activated and the display will show "CO" (COMFORT) for
3 seconds.
Sliding Temperature
When the optional external probe is installed the boiler adjustment system works with
"Sliding Temperature". In this mode, the heating system temperature is regulated ac-
cording to weather conditions, to ensure the high comfort and energy efficiency through-
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out the year. In particular, as the outside temperature increases the system delivery
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temperature decreases according to a specific "compensation curve".
With the Sliding Temperature adjustment, the temperature set with the heating knob (de-
tail 3 - fig. 1) becomes the maximum system delivery temperature. It is advisable to set
a maximum value to allow system adjustment throughout its useful operating range.
The boiler must be adjusted at the time of installation by qualified personnel. However,
the user can make any further adjustments necessary to optimise comfort levels.
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ATLAS 25 SI UNIT
fig. 10
fig. 11
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