Fondital Nova Florida DELFIS CTFS 24 AF, Didactic Manual, Page: 26 / 52

________________________________________________________________________________
26
AST 14 C 259/00
SECT. 5
OPERATING LOGIC
5.1 MAIN GENERAL CHARACTERISTICS

Function priority;

Boiler type selection;

Automatic flame control;

Ignition with ignition ramping or with re-set power output;

DHW priority;

DHW modulation;

Ambient thermostat;

CH modulation;

Ambient thermostat timer;

Heat exchanger boiling control

OpenTherm Remote Control pre-setting;

Boiler freeze-protection function;

Pump post-circulation function;

Post-ventilation function;

Pump anti seizing function for inactivity;

Gas proportional modulation coil wholeness check;

Temperature probe wholeness check;

Safety devices.
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 (the pump only freeze protection 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 Pump anti seizing
8 Waiting for a request
BOILER TYPE SELECTION
Methane Gas or LPG Configuration
This selection is made through the P0 parameter setting (see previous section): the
current to be applied to the gas proportional modulation coil to achieve the correct
modulation will thus be selected.
CTFS (forced draught) or CTN (natural draught) configuration
Acknowledgement is automatically executed upon microswitch reset based on the
electrical connections envisaged for flue thermostat or air pressure switch.