Viessmann B1KA - Page 6

Gas boiler, series B and C,
Category II
2H3P
Rated heating output range (to EN 677)
T
F
/T
R
= 50/30 °C kW 6.5 - 19.0 6.5 - 26.0 8.8 - 30.0 8.8 - 35.0
T
F
/T
R
= 80/60 °C kW 5.9 - 17.3 5.9 - 23.7 8.0 - 27.3 8.0 - 31.9
Flue gas parameters
Calculation values for sizing the flue system to EN 13384. Flue gas
temperatures as actual gross values at 20 °C combustion air temper-
ature.
Flue gas category to G 635/G 636 G
52
/G
51
G
52
/G
51
G
52
/G
51
G
52
/G
51
Flue gas temperature at a return temperature of 30 °C (significant for
the sizing of the flue system)
– At rated heating output °C 45 45 45 45
– At partial load °C 35 35 35 35
Flue gas temperature at a return temperature of 60 °C (used to deter-
mine the application range of flue pipes with max. permissible operat-
ing temperatures)
°C 68 68 70 70
Mass flow rate
Natural gas
– At rated heating output (DHW heating) kg/h 30.1 41.1 56.9 56.9
– At partial load kg/h 14.6 14.6 17.6 17.6
LPG
– At rated heating output (DHW heating) kg/h 34.0 46.4 62.0 62.0
– At partial load kg/h 15.9 15.9 19.4 19.4
Available draught Pa 100 100 100 100
mbar 1.0 1.0 1.0 1.0
Max. amount of condensate (according to DWA-A 251) l/h 2.5 3.4 3.9 4.6
Condensate connection (hose nozzle) Ø mm 20-24 20-24 20-24 20-24
Flue gas connection Ø mm 60 60 60 60
Ventilation air connection Ø mm 100 100 100 100
Standard seasonal efficiency [to DIN]
At T
F
/T
R
= 40/30 °C % Up to 98 (H
s
) [gross cv] / 109 (H
i
) [net cv]
Energy efficiency class
– Central heating A A A A
– DHW heating, draw-off profile XL — A A A
Information regarding the max. permissible gas supply pres-
sure
If the gas supply pressure is higher than the maximum permissible
value, install a separate gas pressure governor upstream of the sys-
tem.
Note on connection values
The connection values are only for reference (e.g. in the gas con-
tract application) or for a supplementary, rough estimate to check the
volumetric settings. Due to factory settings, the gas pressure must
not be altered from these values. Reference: 15 °C, 1013 mbar
(101.3 kPa).
Vitodens 100-W
(cont.)
6
VIESMANN
VITODENS
1
5546 630 GB