Chaffoteaux MIRA SYSTEM 24 CF [18/20] Technical specifications

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

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

at 20 mbar Vr 2,75 m

/h 0,95 m

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