Appendix 6
Wall-mounted condensing gas boiler Buderus 800 - Subject to modifications resulting from technical improvements!
63
6 Appendix
6.1 Technical data
Size Unit
800 – 24 800 – 24T25
H/V
800 – 29 800 – 29T25
H/V
800–43 800–60
Type of gas category as per EN 437
Great Brittain
GB II
2H3P
20 mbar (natural gas H); 37 mbar (LPG) GB I
2H
20 mbar
(natural gas H)
Rated thermal load
G20
[kW]
[Btu/h]
6.6 – 22.0
22,520 – 75,060
6.6–22.0
22,520 – 75,060
8.4 – 28.0
28,660 – 95,540
8.4 – 28.0
28,660 – 95,540
12.1–40.2
41,285 – 137,162
22.0–56.5
75,064 – 192,778
Rated heating capacity
Heating curve 75/60 C
Heating curve 40/30 C
[kW]
[Btu/h]
[kW]
[Btu/h]
6.4 – 21.4
21,840 – 73,020
7.0 – 23.4
23,880 – 79,840
6.4–21.4
21,840 – 73,020
7.0–23.4
23,880 – 79,840
8.2 – 27.3
27,980 – 93,150
8.8 – 29.9
30,030 – 102,020
8.2 – 27.3
27,980 – 93,150
8.8 – 29.9
30,030 – 102,020
11.8 – 39.3
40,260 – 134,090
12.9–42.9
44,015 – 146,375
21.4–55.1
73,016 – 188,000
23.7–60.0
80,865 – 204,720
Seasonal efficiency (SEDBUK) %
90.0 90.4 90.1 90.5 90.3 90.2
Boiler efficiency
Heating curve 75/60 C (max. capacity)
Heating curve 40/30 C (min. capacity)
[%]
[%]
97.3
107.0
97.3
107.0
97.5
107.1
97.5
107.1
97.8
107.0
97.6
107.1
Stand-by heat losses [%] 0.60 0.50 0.50 0.50 0.40 0.34
Central heating installation
Min. circulation water volume [
l
/
h
] 150 150 225 225 300 500
Heating water temperature [°C] 40 - 80 40 - 80 40 - 80 40 - 80 40 - 80 40 - 80
T at residual head of 200 mbar [K] approx. 15 approx. 18 approx. 18 approx. 18 approx. 22 approx. 20
Max. operating overpressure boiler [bar] 3 3 3 3 3 3
Volume heat exchanger heating
circuit [l]2.52.53.03.03.64.7
Pump over-run time
Position 1
Position 2
[min]
[h]
4
24
4
24
4
24
4
24
4
24
4
24
Hot water circuit combination boilers
Volume hot water reservoir [l] – 25 – 25 – –
Max. operating overpressure
hot water reservoir
[bar]–8–8––
Pump over-run time following
domestic hot water mode
[min] – 2 – 2 – –
Domestic hot water flow rate
at 60 °C [
l
/
min
]–6.0–8.0– –
Stand-by heat losses in hot
water mode in 24 hours at
WW (DHW)
temp
= 60 °C [kWh] – approx. 1.6 – approx. 1.6 – –
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