17
ENGLISH
Multigas table
DESCRIPTION
Methane gas
(G20)
Propane
(G31)
Lower Wobbe index (at 15°C-1013 mbar) MJ/m
3
S 45,67 70,69
Net Caloric Value MJ/m
3
S 34,02 88
Supply nominal pressure mbar (mm W.C.) 20 (203,9) 37 (377,3)
Supply minimum pressure mbar (mm W.C.) 10 (102,0)
Diaphragm (number of holes) Number 1 1
25 C.S.I. 29 C.S.I. 25 C.S.I. 29 C.S.I.
Diaphragm (diameter of holes) mm 4,8 5,1 3,8 3,9
Silencer diaphragm (diameter) mm 31 - 27 29
CH maximum gas capacity Sm
3
/h 2,12 2,64
kg/h 1,55 1,94
DHW maximum gas capacity Sm
3
/h 2,64 3,07
kg/h 1,94 2,25
CH minimum gas capacity Sm
3
/h 0,53 0,63
kg/h 0,39 0,47
DHW minimum gas capacity Sm
3
/h 0,53 0,63
kg/h 0,39 0,47
Number of fan rotations with slow switch-on rpm 4.000 4.000 4.000 4.000
Maximum number of fan rotations (CH) rpm 4.900 5.300 4.900 5.200
Maximum number of fan rotations (DHW) rpm 6.100 6.200 6.100 6.000
Minimum number of fan rotations (CH/DHW) rpm 1.400 1.400 1.400 1.400
Maximum number of fan rotations (CH) in C(10) conguration rpm 4.900 - - -
Maximum number of fan rotations (DHW) in C(10) conguration rpm 6.100 - - -
Minimum number of fan rotations (CH/DHW) in C(10) conguration rpm 1.400 - - -
Parameter Symbol CIAO GREEN
25 C.S.I.
CIAO GREEN
29 C.S.I.
Unit
Seasonal space heating energy efciency class - A A -
Water heating energy efciency class - A A -
Rated heat output Pnominal 20 24 kW
Seasonal space heating energy efciency ηs 93 93 %
Useful heat output
At rated heat output and high-temperature regime (*) P4 19,5 24,5 kW
At 30% of rated heat output and low-temperature regime (**) P1 6,5 8,1 kW
Useful efciency
At rated heat output and high-temperature regime (*) η4 87,7 87,6 %
At 30% of rated heat output and low-temperature regime (**) η1 97,8 97,8 %
Auxiliary electricity consumption
At full load elmax 29,0 38,0 W
At part load elmin 10,4 13,1 W
In Stand-by mode PSB 2,4 2,4 W
Other parameters
Stand-by heat loss Pstby 40,0 35,0 W
Pilot ame energy consumption Pign - - W
Annual energy consumption QHE 53 63 GJ
Sound power level, indoors LWA 53 56 dB
Emissions of nitrogen oxides NOx 30 30 mg/kWh
For combination heaters
Declared load prole XL XL
Water heating energy efciency ηwh 85 85 %
Daily electricity consumption Qelec 0,109 0,120 kWh
Daily fuel consumption Qfuel 22,920 23,021 kWh
Annual electricity consumption AEC 24 26 kWh
Annual fuel consumption AFC 17 17 GJ
(*) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
(**) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return
temperature (at heater inlet).