Viessmann B0KA - Page 95

95
Gas boiler, type B and C, category I
2N
/I
2H
Type B0KA, BPKA
Rated heating output range (details to
EN 15502)
T
F
/T
R
= 50/30 °C
Natural gas kW
3.2 (7.0
*2
) to 19.0 3.2 (7.0
*2
) to 25.0
LPG kW 3.2 to 19 3.2 to 25
T
F
/T
R
= 80/60 °C
Natural gas kW
2.9 (6.3
*2
) to 17.0 2.9 (6.3
*2
) to 22.5
LPG kW 2.9 to 17 2.9 to 22.5
Supply values
Relative to the max. load and 1013 mbar/15 °C
Natural gas E
m
3
/h
1.88 2.48
Natural gas LL
m
3
/h
2.19 2.88
LPG kg/h 1.4 1.83
Flue gas parameters
Temperature (at a return temperature of 30 °C)
■
At rated heating output °C 41 46
■
At partial load °C 38 38
Temperature (at a return temperature of 60 °C, for
DHW heating)
°C 65 67
Temperature when overheating °C 120
Mass flow rate (for DHW heating)
Natural gas
■
At the max. rated heating output kg/h 31.7 41.6
■
At partial load kg/h 5.6 (9.8) 5.6 (9.8)
Available draught (with individual connection) Pa 250 250
mbar 2.5 2.5
Max. amount of condensate
To DWA-A 251
l/h 3.8 4.4
Condensate connection (hose nozzle) Ø mm 20 to 24 20 to 24
Flue gas connection Ø mm 60 60
Ventilation air connection Ø mm 100 100
Standard seasonal efficiency [to DIN] at
T
F
/T
R
= 40/30 °C % Up to 98 (H
s
) [gross cv]
Energy efficiency class A A
Note
The supply values are only for reference (e.g. in the
gas contract application) or for a supplementary, rough
estimate to check the volumetric settings. Due to fac-
tory settings, the gas pressure must not be altered
from these values. Reference: 15 °C, 1013 mbar
(101.3 kPa).
*2
Appliances for multiple connection of type B0KA-[kW]-M
Specification
Gas condensing combi boiler (cont.)
6179762
Service