4
2 TECHNICAL DATA
Alpha E-Tec 28 and 33 - Technical Data
2.1 TECHNICAL PERFORMANCE DATA - NATURAL GAS (Cat I2H 2H - G20 20 mbar)
2.1 TECHNICAL PERFORMANCE DATA - LPG - PROPANE GAS (Cat I3P 3P - G31 37 mbar)
Note: OtherTechnical data is the same as NG data.
Heat input gross - DHW kW
Heat input gross - CH kW
Gas supply pressure mbar
Gas burner injector mm
CO
2
at maximum CH output
CO
2
at maximum DHW output
CO
2
at minimum output
Gas rate at maximum output kg/h
31.3
26.7
37
3.80
11.4
11.4 (±0.3)
10.6 (±0.2)
2.24
35.4
31.1
37
4.30
11.2
11.2 (+0.2/-0.4)
10.0 (+0.4/-0.2)
2.53
E-Tec 28 E-Tec 33
36.2
31.7
32.6
28.6
29.7
28
4.9
32
3.45
20
85
6.00
14.1
16.5
30
17
6
9.5
9.5 (±0.2%)
8.6 (+0.2/-0.3%)
450
0.004
90.2
89.0
87 (XL)
93
2.5
0.5
1.0
3.0
8.0
1.0
105
2
Heat input gross - DHW kW
Heat input gross - CH kW
Heat input net - DHW kW
Heat input net - CH kW
Heat output condensing (50/30°C) - CH kW
Heat output non condensing (80/60°C) CH kW
Heat output min. - CH kW
Heat output nominal - DHW kW
Gas rate at max. output m³/h
Gas supply pressure mbar
Max. CH temperature - Set point °C
Gas burner injector diameter mm
DHW flow rate at 35°C rise l/min
DHW flow rate at 30°C rise - EN13203-1 l/min
Dry NOx weight mg/kWh
Dry NOx ppm
NOx Class
Factory set CO
2
CO
2
at maximum CH output %
CO
2
at maximum DHW output %
CO
2
at minimum output %
CO (max) ppm
Maximum CO/CO
2
Ratio
SAP/SEDBUK seasonality efficiency 2005 %
SAP/SEDBUK seasonality efficiency 2009 %
ErP DHW efficiency %
ErP Seasonal space heating efficiency %
Max. primary system pressure bar
Min. primary system pressure bar
Recommended system pressure - Cold bar
System pressure relief valve setting bar
Expansion vessel size litres
Expansion vessel charge pressure bar
Electrical power consumption - Max. Watts
Electrical power consumption - Standby Watts
E-Tec 28
E-Tec 33
32.0
27.3
28.8
24.6
26.1
24.1
4.3
28.3
3.05
20
85
5.00
12.1
14.1
35
20
6
9.7
9.7 (+0.5/-0.2%)
8.8 (+0.2/-0.3%)
450
0.004
90.1
88.9
87 (XL)
93
2.5
0.5
1.0
3.0
8.0
1.0
80
2
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