18
These boilers are designed to operate with natural gas or LPG. If the type of gas is changed, only a qualified professional is
authorised to carry out this operation.
18. Technical specifications
Model 24 kW CF
Heating power Pn
7,5 - 24 KW
Variable tank pre-heating power Pn max
24 kW
Class I - type B11BS (natural draught/chimney/overflow safety device)
Category II 2E+3+
Fresh air flow rate required for combustion V 48 m
3
h.
Combustion products mass flow rate M 20 g/s
Average temperature for combustion products 120 °C
Associated BACD tank capacity 120 150
Specific domestic hot water flow rate (ΔT: 30 K) D 22,2 l/mn 24,6 l/mn
Minimum central heating circuit flow rate 300 I/h.
Maximum heating circuit pressure Pw max
3 bar
Adjustable heating flow temperature 35 to 85 °C
Adjustable domestic hot water temperature (system plus) 40 to 60 °C
Electric voltage 230 volt, single phase - 50 Hz
Electrical power consumption 90 W
Electrical protection IP X4D
Nominal gas flow rate (15 °C-1013 mbar) Gas rate max Gas rate mini
Qn 26,0 kW 9 kW
G 20 34,02 MJ/m
3
at 20 mbar Vr 2,75 m
3
/h 0,95 m
3
/h
G 30 45,6 MJ/kg a 28-30 mbar Vr 2,05 kg/h 0,71 kg/h
G 31 46,4 MJ/kg at 37 mbar Vr 2,02 kg/h 0,70 kg/h
Nat Prop
Feeder marking Marking NAT Gas 125 LPG Gas 77
Injector size in 1/100 of mm 125 77
No. of injectors 12 12
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