Ariston 47-116-17 Settings Display, Regulations Potentiometers, Setting the Temperature Field

3.6.3.SETTINGS DISPLAY

The boiler is designed to monitor some operating variables and settings by means of the display on the front control panel. Keeping the reset key pressed for over 10 seconds allows access to the “readout” function of the main system variables. By pressing the button repeatedly after that, it is possible to read the following information in sequence:

Indication on the	Value read on right-hand display
left-hand display
U/1	Flow temperature of the heating circuit (C°)
U/2	Return temperature of the heating circuit (C°)
U/5	Domestic hot water output temperature (C°)
U/F	Ionisation current (expressed in bT)
U/t	Main circuit flow switch
P/A	Heating ignition delay (see section 3.6.4. -
	expressed in min.x10)
P/-	Maximum thermal power for heating (expressed
	in a percentage of the difference between the
	maximum power allowed by the boiler and the
	minimum)
P/L	Soft light power (expressed in a percentage of
	the difference between the maximum power
	allowed by the boiler and the minimum)
b	Last safety shut-off (see section 3.7.)
l	Last shutdown (see section 3.7.)

entered may be viewed in the manner described in section 3.6.3. (the display shows the value with steps of 10).

2.PR - Maximum heating circuit power potentiometer, variable between the maximum allowed by the boiler and the minimum (see “TECHNICAL INFORMATION” table). The boiler is calibrated in the factory at 70%.

3.RLA - Soft-light potentiometer, variable between the maximum power (shown on the display as “00”, i.e. 100%) and minimum power (shown on the display as “01”, i.e. 1%). The boiler is calibrated in the factory at a value which is suitable for ignition with any type of gas (approx. 70%).

The display shows the value between 100% (“00” on the display) and 1% (“01”) of this interval. The indications on the display with regard to the power are shown in the graph:

DISPLAY MESSAGE REFERENCE

To return to the normal display, press the “H” reset key repeatedly until all the sequence of “readout” functions have scrolled through the display and until one of the “display of normal operations” has appeared (the message that appears will depend on the current operating mode of the boiler).

*NOTE 1: U/1 means that “u” and “1” blink alternately on the display

NOTE 2: the value 100% appears as “00” on the display

3.7.REGULATIONS

3.7.1.POTENTIOMETERS

To access the areas reserved for the regulation and control, open the control panel, after having first unscrewed the plastic fastening screws, and raise the rubber protection stopper for the potentiometers, as shown in the illustration.

This allows access to the three regulation potentiometers:

1.RA - Ignition delay (anti-cycling device) potentiometer

It is possible to set the ignition delay by adjusting the potentiometer with a screwdriver. The values that may be selected range from 0 to 15 min.

The delay has been set at 15 minutes in the factory. The value

3.7.2.SETTING THE TEMPERATURE FIELD

Remove the protection of the display using a screwdriver as a lever. Press the reset button for over 5 seconds. The display will show “A03”. On pressing the reset button again the display will change to “R00” (R indicates the setting of the field of regulation of the flow temperature). Using the button “E”, the setting may be changed. It is possible to choose two fields of regulation of the flow temperature. “00” signifies that the flow temperature (which may be set by means of the knob on the front control panel) may be regulated from 30 to 75°C. “01” signifies that the flow temperature (which also may be set by means of the knob on the front control panel) may be regulated from 42 to 82 °C. The factory setting is “00”.

3.7.3.COMFORT KEY:

24 MFFI

The boiler allows the convenience level to be increased in the output of domestic hot water by means of the “COMFORT” function. This function keeps the secondary exchanger warm during the periods in which the boiler is inactive, thereby allowing the initial water drawn to be at a higher temperature. The function may be activated by pressing the “H” key on the control panel (see section 3.3.). When the function is active, a green light comes on, again located on the control panel.

NOTE: During the overrun period of the pump, the “COMFORT” function, if selected, is temporarily deactivated. The L.E.D. light remains on to indicate that the boiler will return to the “COMFORT” mode once the pump overrun is terminated.

HEATING ONLY KEY:

24 RFFI

This function may be activated by pressing the “H” key on the control panel (see section 3.3.). When the function is active, a green light comes on, again located on the control panel. This indicates that the external indirect cylinder is not maintained at the set temperature, only the anti-frost protection of the indirect cylinder is active. When the temperature goes below 5°C, the boiler turns itself on and heats up the indirect cylinder until the temperature goes over 10°C.

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