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Type
Rated heating output at 80/60 °C
Rated heating output at 50/30 °C
Rated heat input
Lowest heating output (modul.) at 80/60 °C
Lowest heating output (modul.) at 50/30 °C
Lowest heat input (modul.)
Heating flow connection
Heating return connection
DHW connection / DHW circulation
Cold water connection
Gas connection
Balanced flue connection
Dimensions
Depth
Width
Height
Balanced flue system
Gas category
Gas supply details
Natural gas E/H (Hi [net cv]=9.5 kWh/m³=34.2 MJ/m³)
Natural gas LL (Hi [net cv]=8.6 kWh/m³=31.0 MJ/m³)
LPG (Hi [net cv]=12.8 kWh/m³=46.1 MJ/m³)
Natural gas supply pressure (permissible min./max.)
LPG supply pressure (permissible min./max.)
Efficiency at rated load at 80/60 °C (Hi[net cv]/Hs[gross cv])
Efficiency at 30 % partial load and TR=30 °C (Hi[net cv]/Hs[gross cv])
Flow temperature. factory setting
Flow temperature up to approx.
Max. overall positive pressure. heating circuit
Max. residual head for heating circuit: High efficiency pump (EEI<0.20)
1075 l/h pump rate (25 kW at dt=20 K)
1376 l/h pump rate (32 kW at dt=20 K)
Max. permiss. overall positive pressure
DHW throughput
Minimum flow pressure 15502-2-2
DHW temperature range (adjustable)
Spec. water throughput "D" at ΔT = 30 K
Expansion vessel. total capacity
Expansion vessel. pre-charge pressure
Flue gas temperature 80/60-50/30 at Qmax
Flue gas temperature 80/60-50/30 at Qmin
Flue gas mass flow rate at Qmax
Flue gas mass flow rate at Qmin
Available gas fan draught at Qmax
Available gas fan draught at Qmin
Flue gas category
NOx class
Amount of condensate at 50/30 °C
pH value of condensate
Power consumption in standby
Power consumption
IP rating
Power supply/fuse/MCB protection
Total weight (wall mounted gas condensing boiler)
CE ID number
1) Heating mode / DHW mode
3064458_201811
4. Specification
kW
kW
kW
kW
kW
kW
G
G
G
G
R
mm
mm
mm
mm
Type
m³/h
m³/h
kg/h
mbar
mbar
%
%
°C
°C
bar
mbar
mbar
bar
l/min
bar
°C
l/min
l
bar
°C
°C
g/s
g/s
Pa
Pa
l/h
W
W
IP
kg
FGB-28
FGB-35
24.4/27.3
1)
31.1/34
1)
27.3
34.9
25/28
1)
32/35
1)
4.8
6.7
5.3
7.5
4.9
6.9
3/4"(DN 20)
3/4"(DN 20)
1/2"
1/2"
1/2"
60/100
310
408
720 (incl. device connection flange)
B23P, B33P, C13(x), C33(x), C43(x), C53(x),
C63(x), C83(x), C93(x)
see table an page 44
2.63/2.94
3.36/3.68
2.90/3.25
3.72/4.06
1.95/2.18
2.5/2.73
see table on page 44
see table on page 44
98/88
98/88
109/98
109/98
75
85
2.5
450
450
-
350
8
8
0.75-0.95
0.75-0.95
85-65
70-50
50-40
50-40
11.2/12.50
14.26/15.50
2.33
3.25
150
160
8
12
G52
6
ca. 1.0
ca. 1.7
ca. 4.3
ca. 4.3
2
2
max. 102
max. 114
IPX4D
IPX4D
230V / 50Hz / 3.15A
27
28
CE-0085CQ0261
FGB-K-28
FGB-K-35
24.4/27.3
1)
31.1/34
1)
27.3
34.9
25/28
1)
32/35
1)
4.8
6.7
5.3
7.5
4.9
6.9
3/4"(DN 20)
3/4"(DN 20)
1/2"
1/2"
1/2"
60/100
310
408
2.63/2.94
3.36/3.68
2.90/3.25
3.72/4.06
1.95/2.18
2.5/2.73
see table on page 44
see table on page 44
98/88
98/88
109/98
109/98
75
85
2.5
450
450
-
350
10
10
2.0-14.4
2.0-14.4
0.2
0.3
30-65
30-65
13.4
16.3
8
8
0.75-0.95
0.75-0.95
85-65
70-50
50-40
50-40
11.2/12.50
14.26/15.50
2.33
3.25
150
160
8
12
G52
6
ca. 1.0
ca. 1.7
ca. 4.3
ca. 4.3
2
2
max. 102
max. 114
IPX4D
IPX4D
230V / 50Hz / 3.15A
27
28
CE-0085CQ0261
9
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