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40
AST 14 C 258/00
SECT. 5
OPERATING LOGIC
5.1 MAIN GENERAL CHARACTERISTICS
Function
priority;
Boiler
type
setting;
Ignition phase at pre-set power;
Flame propagation phase at pre-set power;
Automatic flame control;
DHW
priority;
Plate DHW modulation;
Ambient
thermostat;
Ambient
thermostat timer (antifast);
Boiler maximum power (settable);
Temperature range pre-selection;
CH modulation with power rising ramp
Thermoregulation with external temperature probe;
Open therm remote control pre-setting;
Programmable multifunction relay;
Preset for control unit for different zones;
Temperature probe wholeness check;
Brushless fan wholeness check;
Flow freeze protection function;
Plate DHW freeze protection function;
Anti-shutdown
function;
Pump post-circulation function;
Post-ventilation
function;
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
Shutdown status (the "pump only" freeze protection and "deviating valve and
pump seizing" functions could anyway be executed)
2 Flue
cleaning
3 DHW
request
4
Heating request in "DHW + CH" mode
5
Heating freeze protection both in "DHW" and "DHW + CH" modes
6 Post-circulation
7
Deviating valve and pump anti-seizing
8
Waiting for a request