Viessmann B0KA Installation And Service Instructions Manual page 89

Gas condensing combi boiler
Gas boiler, type B and C, category I
Type
Rated heating output range (details to EN 15502)
T /T = 50/30 °C
F R
Natural gas
T /T = 80/60 °C
F R
Natural gas
Weight
Excl. heating water and packaging
■
Incl. heating water
■
Water capacity (excl. diaphragm expansion vessel)
Max. flow temperature
Max. flow rate
(Limit for the use of hydraulic separation)
Nominal circulating water volume
At T /T = 80/60 °C
F R
Diaphragm expansion vessel
Capacity
Pre-charge pressure
Permiss. operating pressure
Connections (with connection accessories)
Boiler flow and return
Cold water and DHW
Dimensions
Length
Width
Height
Gas connection
Supply values
Relative to the max. load and 1013 mbar/15 °C
Natural gas E
Natural gas LL
Flue gas parameters
Temperature (at a return temperature of 30 °C)
At rated heating output
–
At partial load
–
Temperature (at a return temperature of 60 °C, for DHW
heating)
Mass flow rate (for DHW heating)
Natural gas
At rated heating output
–
At partial load
–
Available draught
Appliances for multiple connection of type B0KA-[kW]-M
*1
(cont.)
/I
2N 2H
kW
kW
kg
kg
l
°C
l/h
l/h
l
bar
kPa
bar
MPa
G
G
mm
mm
mm
R
m
m
°C
°C
°C
kg/h
kg/h
Pa
mbar
3.2 (7.0 ) - 19.0
*1
2.9 (6.3 *1 ) - 17
See residual head graphs
752
0.75
300
400
700
3 1.88
/h
2.19
3
/h
31.7
5.6 (9.8)
250
Specification
B0KA
BPKA
3.2 (7.0 ) - 25.0
*1
2.9 (6.3 *1 ) - 22.5
35 35
41 41
3.0 3.0
82 82
988
8 8
0.75
75 75
3 3
0.3 0.3
¾ ¾
½ ½
300
400
700
¾ ¾
2.48
2.88
41 46
38 38
65 67
41.6
5.6 (9.8)
250
2.5 2.5
89