74
Gas boiler, type B and C, category I
2N
/I
2H
Type
B1GA
Rated heating output range (details to
EN 15502)
T
F
/T
R
= 50/30 °C
Natural gas
kW
3.2 - 11
3.2 - 16
3.2 - 19
3.2 - 25
3.2 - 32
T
F
/T
R
= 80/60 °C
Natural gas
kW
2.9 - 9.9
2.9 -
14.4
2.9 - 17
2.9 -
22.5
2.9 - 28.7
Dimensions
Length
mm
285
285
285
285
340
Width
mm
375
375
375
375
375
Height
mm
600
600
600
600
600
Gas connection
R
¾
¾
¾
¾
¾
Supply values
Relative to the max. load and
1013 mbar/15 °C
With gas
Natural gas E
m
3
/h
1.1
1.6
1.88
2.48
3.16
Natural gas LL
m
3
/h
1.3
1.86
2.19
2.88
3.68
Flue gas parameters
Temperature
(at a return temperature of
30 °C)
–
At rated heating output
°C
39
40
41
46
59
–
At partial load
°C
38
38
38
38
38
Temperature
(at a return temperature of
60 °C, for DHW heating)
°C
64
64
65
67
72
Available draught
Pa
250
250
250
250
250
mbar
2.5
2.5
2.5
2.5
2.5
Available draught
for B23P
Pa
232
400
527
698
635
mbar
2.32
4
5.27
6.98
6.35
Max. amount of condensate
To DWA-A 251
l/h
2.5
2.5
2.5
3.3
4.2
Condensate connection (hose nozzle)
Ø mm
20 - 24
21 - 24
20 - 24
20 - 24
20 - 24
Flue gas connection
Ø mm
60
60
60
60
60
Ventilation air connection
Ø mm
100
100
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
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).
Specification
Gas condensing boiler
(cont.)
6174240
Service
