7
general information
GEN. NOTES
Model Name CLAS SYSTEM
21 FF
CLAS SYSTEM
28 FF
CE certifi cation (pin) 1312BR4793 1312BR4793
Boiler type C12-C32-C42-C52-B22-B32
ELECTRICAL PERFORMANCE
Max/min nominal heat input(Hi) kW 25.8 / 11.0 30.0 / 13.0
Max/min nominal heat input (Hs) kW 28.7 / 12.2 33.3 / 14.4
Max/min nominal heat input for hot water (Hi) kW 27 / 11.0 31.3 / 13.0
Max/min nominal heat input for hot water (Hs) kW 30 / 12.2 34.8 / 14.4
Heat output: max/min kW 24.2 / 9.8 28.1 / 11.6
Combustion effi ciency (at fl ue) Hi/Hs % 95.0 93.9
Gross effi ciency of nominal heat input (60/80 °C) Hi/Hs % 94.8 / 84.5 93.6 / 84.3
Gross effi ciency at 30 % at 47°C Hi/Hs % 93.6 / 84.3 93.2 / 83.9
Gross effi ciency at minimum power Hi/Hs % 89.2 / 80.3 89.3 / 80.4
Number of effi ciency stars (Directive 92/42/EEC) stars *** ***
Rating Sedbuk class D D
Ma. heat loss to the casing (∆T = 50°C) % 0.4 0.3
Heat loss through the fl ue when burner on % 5.0 6.1
Heat loss through the fl ue when burner off % 0.4 0.4
EMISSIONS IN C.H.
Residual discharge head mbar 100 104
Nox class class 3 3
Flue fumes temperature (G20) °C 98 114
CO2 content
2
(G20) % 6.6 6.4
CO content (0 %0
2
) ppm 40 92
O2 content2
(G20) % 8.7 8.9
Max Discharge of Products of Combustion (G20) Kg/h 97 67.5
Excess air % 62.8 74
HEATING CIRCUIT
Load losses water side (max) ∆T=20°C mbar 200 200
Residual head for the system bar 0.25 0.25
Expansion vessel pre-charged pressure bar 1 1
Maximum central heating circuit pressure bar 3 3
Expansion vessel capacity l 8 8
Central heating temperature: max/min °C 85 / 35 85 / 35
DOMESTIC HOT WATER CIRCUIT
Domestic hot water temperature max/min (Approx)
°C 60 / 36 60 / 36
ROOMELECTRICAL
DATA
Power supply voltage/frequency V/Hz 230/50 230/50
Power consumption W 127 136
Minimum operating room temperature °C +5 +5
Electric system grades of protection IP X5D X5D
Weight kg 31 31
Dimensions (W x H x D) : mm 400/770/315 400/770/315
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