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Buderus commercial and domestic boilers

[GB 312 400kW]

Dimensions

Parameter Value
Length, LK 1202mm
Length, LG 2421mm
Length, LG1 2040mm
Width, BG 2135mm
Net weight 530kg
Installation dimensions, K 327mm
Installation dimensions, M 663mm
Installation dimensions, N 270mm
Installation dimensions, O 567mm
Installation dimensions, R 773mm
Installation dimensions, S 515mm
Installation dimensions, S1 210mm
Installation dimensions, U 259mm
Flue gas connection, ØDAA 250DN
Flue gas connection, HAA 2126mm
Flue gas connection, HAA1 1727mm
Flue gas connection, A2 436mm
Boiler flow connection, ØVK 80DN
Boiler flow connection, HVK 1299mm
Boiler return connection, Ø RK 80DN
Boiler return connection, HRK 330mm
Distance, BZ 935mm
Air sealed, ØRLU 110DN
Air sealed, HRLU 1018mm
Gas connection, ØGAS R1½"
Gas connection, HGAS 1143mm
Gas connection, A1 270mm

Technical Parameters

Parameter Value
Output 400kW
Nominal heat output at 80/60 °C, Full load 374kW
Nominal heat output at 80/60 °C, Part load 55kW
Nominal heat output at 50/30 °C, Full load 400kW
Nominal heat output at 50/30 °C, Part load 62kW
Rated heat input, Part load 57kW
Rated heat input, Full load 386kW
Max working pressure 4bar
Max flow temperature 80°C
Electrical power consumption, full load 460W
Electrical power consumption, part load 50W
Gas pressure 17 - 24 mbar
Water content 48l
Electrical ingress protection IP 40
CE certification, product ID no. CE 0085BP5508
Pressure at flue outlet 100Pa
Water flow resistance, ΔT 20K 90mbar
Safety temperature letter 100°C
Electrical connection 230VAC 50Hz
Flue gas mass flow rate at 50/30 °C, Full load 175.6g/s
Flue gas mass flow rate at 50/30 °C, Part load 25.1g/s
Flue gas mass flow rate at 80/60 °C, Full load 176g/s
Flue gas mass flow rate at 80/60 °C, Part load 26.7g/s
CO2 content, Full load 9.1%
CO2 content, Part load 9.3%
Sound emission level, Full load 58dB(A)
Sound emission level, Part load 40dB(A)
Min flue gas temperature at 80/60 °C, Full load 74°C
Min flue gas temperature at 80/60 °C, Part load 56°C
Min flue gas temperature at 50/30 °C, Part load 30°C
Min flue gas temperature at 50/30 °C, Full load 55°C

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