Viessmann B1HF - Page 109

109
Gas boiler, type B and C, category II
2N3P
Type B1KF-26 B1KF-30 B1KF-35
Rated heating output range (details to EN 15502)
T
F
/T
R
= 50/30 °C
Natural gas kW
3.2 (5.7
*4
) -
25.0
3.2 (5.7
*1*4
) -
25.0
3.2 (5.7
*1*4
) -
32.0
LPG kW 3.2 - 25.0 3.2 - 25.0 3.2 - 32.0
T
F
/T
R
= 80/60 °C
Natural gas kW
2.9 (5.2
*1*4
) -
23.0
2.9 (5.2
*1*4
) -
23.0
2.9 (5.2
*1*4
) -
29.3
LPG kW 2.9 - 23.0 2.9 - 23.0 2.9 - 29.3
Flue gas parameters
Temperature (at a return temperature of 30 °C)
– At rated heating output °C 41 46 59
– At partial load °C 38 38 38
Temperature (at a return temperature of 60 °C, for DHW
heating)
°C 65 67 72
Mass flow rate (for DHW heating)
Natural gas
– At rated heating output kg/
h
31.7 41.6 54.9
– At partial load kg/
h
5.6 (9.8
*1*4
) 5.6 (9.8
*1*4
) 5.6 (9.8
*1*4
)
LPG
– At rated heating output kg/
h
30.1 41 53.9
– At partial load kg/
h
3.9 3.9 3.9
Available draught
*6
Pa 250 250 250
mb
ar
2 2 2
Max. amount of condensate
To DWA-A 251
l/h 3.7 4.3 4.9
Condensate connection (hose nozzle) Ø
mm
20 - 24 20 - 24 20 - 24
Flue gas connection Ø
mm
60 60 60
Ventilation air connection Ø
mm
100 100 100
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 A
*4
Appliances for multiple connection of type B1HF-[kW]-M and B1KF-[kW]-M
*1
Appliances for multiple connection of type B1HF-[kW]-M and B1KF-[kW]-M
*6
CH: The appliance has the following positive pressure (in Pascal) at the flue gas outlet: 200 Pa (2.0 mbar)
Specification
Specification (cont.)
6167586
Service