Unical S 24, Manual

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2.4 - OPERATING DATA ACCORDING TO UNI 10348
OSA S 24 OSA S 28 OSA S 35
Nominal heat input in CH / DHW mode kW 23,4 28,0 / 33,0 33,0
Minimum heat input with Nat. Gas / Propane kW 3,0 / 3,0 4,4 / 4,4 4,4 / 4,4
Nominal heat output kW 23,02 27,3 32,2
Minimum heat output kW 2,96 4,3 4,3
Nominal output in condensation 50/30 °C kW 23,7 28,9 33,8
Minimum heat output in condensation 50/30 °C kW 3,22 4,68 4,68
Combustion efficiency at full load
%
97,2 97,8 97,3
Combustion efficiency at part load
%
98,6 98,2 98,1
Heat losses through the casing (min.-max.)
%
1,4 - 1,0 1,1 - 0,2 1,1 - 0,2
(*) Net flue gas temperature tf-ta (max.) °C 56,8 45,1 54,8
Flue gas mass flow rate (min.-max) g/s 1,35 - 10,5 2,0 - 12,5 2,0 - 14,7
Air excess λ
%
24,3 23,0 23,0
CO
2
%
9,2 - 9,2 9,2 - 9,3 9,2 - 9,3
CO at 0% of O
2
(min. - max) ppm 22 - 114 14 - 88 14 - 94
Maximum production of condensate kg/h 3,8 4,5 5,3
NOx class
5 5 5
Chimney heat losses with burner ON (min. - max.) % 1,4 - 2,8 1,8 - 2,2 1,9 - 2,7
Chimney heat losses with burner OFF
%
0,35 0,34 0,34
Max. available pressure at the chimney base min. / max. Pa 2 / 70 2 / 70 2 / 70
Notes: (*) Room Temperature = 20°C Data obtained with appliance operated with Nat Gas (G20)
2.4.1 - DATA ACCORDING TO ErP DIRECTIVE
Description Symbol Unit OSA S 24 OSA S 28 OSA S 35
Nominal Heat Output Pnominale kW
23 27 32
Seasonal space heating energy
efficiency
ƞ
s
% 94 94 94
Seasonal efficiency class in
heating mode
A A A
Integrated Weather compensator and
room sensor
Classe VI
% 4 4 4
Seasonal space heating energy
efficiency of package
ƞ
s
Packaging
% 98 98 98
Seasonal space heating energy
efficiency class of package
A+ A+ A+
For CH only and combination boilers: useful heat output
Useful Heat Output in high-tempera-
ture regime
(Tr 60 °C / Tm 80 °C)
P
4
kW 13 16 18,4
Useful efficiency at nom. heat output
in high-temperature regime
(Tr 60 °C / Tm 80 °C
ƞ
4
%
88,7 88,9 88,7
Useful heat output at 30% of nom.
heat output in low-temperature
regime (Tr 30 °C)
P
1
kW 4,3 5,3 6,1
Useful efficiency at 30% of nom. heat
output in low-temperature regime
(Tr 30 °C)
ƞ
1
%
99,2 98,1 98,2
Range-rated boiler: YES / NO
YES YES YES
Auxiliary electricity consumption
At full load elmax kW 0,085 0,093 0,093
At part load elmin kW 0,012 0,015 0,015
In stand-by mode P
SB
kW 0,003 0,001 0,001
Other items
Stand-by heat loss P
stb
kW 0,0824 0,113 0,113
Emissions of nitrogen oxides NOx Mg/kWh 41 36
39
For CH & DHw production boilers
Declared load profile
L XL XL
Energy efficiency in DHW production
mode
ƞ
wh
% 84
86 86
Daily electricity consumption Qelec kWh 0,0644 0,0813 0,0813
Daily fuel consumptionl Qfuel kWh 14,41 22,97 22,97
Inside sound power level Lwa dB (A)
53 54 54
Seasonal efficiency class
in DHw production mode
A A A
For the adjustment data: NOZZLES - PRESSURES - DIAPHRAGMS - FLOW RATES - CONSUMPTIONS refer to the paragraph ADAPTATION TO OTHER TYPES OF GAS.