Viessmann B1HF - Page 107

107
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
Max. transmitting power dB
m
20
Low power radio frequency band MH
z
2400 - 2483.5
Max. transmitting power dB
m
10
Supply voltage V 24
Power consumption W 4
Electronic temperature limiter setting (TN) °C 91
Electronic temperature cut-out setting °C 110
Permissible ambient temperature
■
During operation °C +5 to +40
■
During storage and transport °C -5 to +60
Weight
■
Excl. heating water and packaging kg 35 35 35
■
Incl. heating water kg 41 41 41
Water capacity (excl. diaphragm expansion vessel) l 3.0 3.0 3.0
Max. flow temperature °C 82 82 82
Max. flow rate
(Limit for the use of hydraulic separation)
l/h See residual head graphs
Nominal circulating water volume
At T
F
/T
R
= 80/60 °C
l/h 752 988 1259
Diaphragm expansion vessel
Capacity l 8 8 8
Pre-charge pressure bar
kPa
0.75
75
0.75
75
0.75
75
Permiss. operating pressure bar
MP
a
3
0.3
3
0.3
3
0.3
Connections (with connection accessories)
Boiler flow and return R ¾ ¾ ¾
Cold water and DHW G ½ ½ ½
Dimensions
Length mm 360 360 360
Width mm 400 400 400
Height mm 700 700 700
Gas connection R ¾ ¾ ¾
*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
Specification
Specification (cont.)
6167586
Service