Baxi COMBI 424 - Technical specifications; Technical data

3 Technical specifications
3.1 Homologations
3.1.1 Certifications
Tab.1 Certifications
CE certificate number 0085CQ0192
NOx class 5 (EN 15502)
Boiler type C
13
, C
33
3.2
Technical data
3.2.1 Technical information
Tab.2 General
Baxi Combi 224 228 424 428
Gas council numbers 47–077–21 47–077–22 47–077–23 47–077–24
Tab.3 Heating circuit specifications
Baxi Combi 224 228 424 428
Maximum pressure bar 3 3 3 3
Minimum pressure bar 0.5 0.5 0.5 0.5
Heating circuit temperature °C 25/80 ± 5° 25/80 ± 5° 25/80 ± 5° 25/80 ± 5°
Tab.4 Domestic water circuit specifications
Baxi Combi 224 228 424 428
Maximum pressure bar 8.0 8.0 8.0 8.0
Dynamic minimum pressure bar 0.15 0.15 0.15 0.15
Minimum water flow l/min 2.0 2.0 2.0 2.0
Domestic water circuit tempera
ture
°C 35/60 ± 5° 35/60 ± 5° 35/60 ± 5° 35/60 ± 5°
Specific flow rate (D) l/min 11.5 13.4 11.5 13.4
Important
Where low flow taps or fittings are intended to be used in the DHW system connected to the boiler,
it is strongly recommended that the DHW flow rate DOES NOT fall below 2.5 l/min. This will ensure
reliable operation of the DHW function.
Tab.5 Electrical specifications
Baxi Combi 224 228 424 428
Electrical power supply voltage V 230 230 230 230
Electrical power supply fre
quency
Hz 50 50 50 50
Nominal electrical power W 84 94 84 94
3 Technical specifications
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