Viessmann B0KA - Page 94

94
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
Communication module (integral)
WiFi frequency band MHz 2400 to 2483.5
Max. transmission power dBm 20
Low power radio frequency band MHz 2400 to 2483.5
Max. transmission power dBm 10
Supply voltage V 24
Power consumption W 4
Electronic temperature limiter setting (TN) °C 91
Electronic temperature limiter setting °C 110
Electronic flue gas temperature limiter 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
■
Incl. heating water kg 41 41
Water capacity (excl. diaphragm expansion ves-
sel)
l 3.0 3.0
Max. flow temperature °C 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
Diaphragm expansion vessel
■
Capacity l 8 8
■
Pre-charge pressure bar
kPa
0.75
75
0.75
75
Permiss. operating pressure bar
MPa
3
0.3
3
0.3
Connections (with connection accessories)
■
Boiler flow and return G ¾ ¾
■
Cold water and DHW G ½ ½
Dimensions
■
Length mm 300 300
■
Width mm 400 400
■
Height mm 700 700
Gas connection R ¾ ¾
*2
Appliances for multiple connection of type B0KA-[kW]-M
Specification
Gas condensing combi boiler (cont.)
6179762
Service