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11
AST 14 C 255/00
0 = standard, 1 = LCD always on 2 = LCD + keys always on
1. Temperature selection or recall information
This key enables switching from “day” to “night” temperature (and reverse) during the automatic
programming of heating times. When not programming, this key enables to scroll in sequence the parameter
values for displaying purposes only.
2. Programming key
During standard operation, it is possible to switch from manual to automatic programming and reverse by
pressing this key (then pressing “OK” key to confirm). By repeatedly pressing in sequence, it will be possible
to display and edit the desired program: zone 1, zone 2 or boiler (only for the RTFS version).
3. Time and ambient temperature setting key
This key enables the setting of time (hour and minutes), day of the week, ambient “day” and “night” operating
temperatures for the automatic programming mode (each value must be confirmed with the “OK” key).
Warning: in case temperature probes are used for ambient management, “day” temperature represents the
desired ambient temperature.
4. LCD Display
The LCD shows the boiler status and operation information (see following paragraph).
5. Domestic hot water temperature setting key
These keys are used to set (increase or decrease) the domestic hot water temperature from a minimum
value of 35°C to a maximum value of 57° or 65°C, depending on boiler type (instantaneous type or with
water heater respectively).
6. Boiler reset key
This key enables to resume boiler operation after a shut-down (only for resettable faults), or to return to the
main page during the parameter selection.
7. COMFORT and parameter confirmation key
This key is used to enable and disable the COMFORT function in order to maintain the pre-heated plate
exchanger at a specific temperature (CTFS version) or to enable heating of water heater outside the set
programming (RTFS version with water heater).
Besides, this key is used to confirm the new settings while editing.
8. Boiler status selection key
Press this key to set the following functions:
SUMMER
: Boiler produces domestic hot water only.
WINTER
: Boiler provides both central heating and domestic hot water.
CENTRAL HEATING ONLY
: Boiler provides central heating only
STAND-BY OFF: Boiler in standby mode: central heating and DHW functions are disabled.
9. Central heating water temperature setting key
Without external probe, this key is used to set the water temperature value of the heating system between a
minimum value of 35°C and a maximum value of 45°C (reduced range) or 78°C (standard range). With
external probe, instead, it is used to set the fictitious temperature (see paragraph about thermoregulation).
