Immergas MINI NIKE 24 4 ERP, Instruction And Warning Book

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INS
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3.19 COMBUSTION PARAMETERS.
- The data relevant to domestic hot water per-
formance refer to a dynamic inlet pressure of
2 bar and an inlet temperature of 15°C; the
values are measured directly at the boiler outlet
considering that to obtain the data declared
mixing with cold water is necessary.
- * Efficiencies refer to the lower heating value
3.20 TECHNICAL DATA.
Nominal heat input kW (kcal/h) 26.2 (22492)
DHW minimum heat input kW (kcal/h) 8.3 (7116)
CH minimum heat input kW (kcal/h) 10.9 (9357)
Nominal heat output (useful) kW (kcal/h) 23.8 (20468)
DHW minimum heat output (useful) kW (kcal/h) 7.0 (6020)
CH minimum heat output (useful) kW (kcal/h) 9.4 (8084)
* Efficiency at nominal heat output % 91.0
* Efficiency at 30% nominal heat output load % 88,0
Heat loss at case with burner On/Off % 2.30 / 1.20
Heat loss at flue with burner On/Off % 6.70 / 0.09
Central heating circuit max. operating pressure bar 3
Central heating circuit max. operating temperature °C 90
Adjustable central heating temperature °C 35 - 85
System expansion vessel total volume l 4.0
Expansion vessel factory-set pressure bar 1
Water content in generator l 2.5
Total head available with 1000 l/h flow rate kPa (m H
2
O) 27,3 (2,78)
Hot water production useful heat output kW (kcal/h) 23.8 (20468)
Domestic hot water adjustable temperature °C 30 - 60
Min. pressure (dynamic) domestic hot water circuit bar 0.3
Domestic hot water circuit max. working pressure bar 10
Minimum D.H.W. flow rate l/min 1.5
Drawing capacity in continuous duty (∆T 30°C) l/min 11,4
Weight of full boiler kg 28.6
Weight of empty boiler kg 26.1
Electrical connection V/Hz 230/50
Power input A 0.4
Installed electric power W 45
Pump consumption W 34
Value EEI - ≤ 0,20 - Part. 3
Equipment electrical system protection - IPX4D
Boiler flue circuit resistance Pa 1.3
NO
X
class - 3
Weighted NO
X
mg/kWh 150
Weighted CO mg/kWh 27
Type of appliance B11
BS
Category II 2H3+
G20 G30 G31
Gas nozzle diameter mm 1,30 0,79 0,79
Supply pressure mbar (mm H
2
O) 20 (204) 29 (296) 37 (377)
Flue flow rate at nominal heat output kg/h 73 75 74
Flue flow rate at min heat output kg/h 61 57 58
CO
2
at Q. Nom./Min. % 5,00 / 1,80 5,65 / 2,25 5,70 / 2,20
CO with 0% O
2
at Q. Nom./Min. ppm 95 / 60 125 / 75 115 / 69
NO
X
with 0% O
2
at Q. Nom./Min. mg/kWh 245 / 125 362 / 152 338 / 176
Flue temperature at nominal output °C 94 94 95
Flue temperature at minimum output °C 77 81 84
Combustion parameters: measuring conditions
of useful efficiency (flow temperature/return
temperature= 80/60 °C), ambient temperature
reference = 15°C.