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41
AST 14 C 255/00
SECT. 5
OPERATING LOGIC
5.1 MAIN GENERAL CHARACTERISTICS
Function
priority;
Boiler type selection;
Automatic
flame
control;
Ignition with ramp or at pre-set output;
DHW
control;
Plate DHW modulation;
Boiler
DHW
modulation;
DHW COMFORT function;
CH
control;
Temperature range pre-selection;
Ambient
thermostat timer (antifast);
Adjustable CH maximum output;
Heating without ambient probe;
Heating with ambient probe;
Automatic
operation;
Heating
modulation;
Thermoregulation with ambient probe;
Thermoregulation with external probe;
Presetting for Remote Control;
Programmable multifunction relay;
Presetting for connection to supplementary boards;
Temperature probe integrity check;
Anti-shut-down
function;
Post-ventilation
function;
Pump post-circulation function;
Anti-freeze
function;
Automatic
filling
function;
Anti-legionella
function;
Gas proportional modulation coil integrity check;
Safety devices and functions;
FUNCTION PRIORITY
The following table shows main function enabling priorities in case of simultaneous request
of two or more functions.
Priority Status
1
Shut-down status (anti-freeze and anti-shut-down functions in pump only mode can anyway be
carried out)
2
Flue cleaning
3
Boiler anti-legionella (only for R version with water heater)
4
DHW request
5
Plate maintenance (COMFORT function)
6
DHW anti-freeze
7
Heating request in "DHW + CH" mode
8
Heating anti-freeze both in "DHW" and "DHW + CH" modes
9
Post-circulation
10
Pump anti-shut-down
11
Waiting for a request