2
About the appliance
Logano plus SB325 – 6 720 806 328 (2013/07)
10
2.12.3 Values for calculating the flue gas
Fig. 4 Pressure drop on the water side
[
p
H
] Pressure drop on the heating water side
[
V
H
] Flow rate
Fig. 5 Standby loss subject to the average boiler water temperature
[q
B
] Standby loss
[
K
] Average boiler temperature
Boiler size
Abbreviations
Unit
50
70
90
115
System temperatures 50/30 °C
Rated output, gas
Full load
kW
50.0
70.0
90.0
115.0
Partial load 40 %
kW
20.0
28.0
36.0
46.0
Flue gas temperature
1)
1) Calculated flue gas temperature for cross-sectional calculation according to EN 13384 (averages across the series). The measured flue gas temperature may differ, depending
on the burner setting and actual temperature of the system.
Full load
°C
45
45
45
45
Partial load 40 %
°C
30
30
30
30
Flue gas mass flow rate
Full load
kg/s
0.0189
0.0268
0.0344
0.0443
Partial load 40 %
kg/s
0.0074
0.0103
0.0133
0.0171
System temperatures 80/60 °C
Rated output, gas
Full load
kW
46.0
64.4
82.7
105.7
Partial load 40 %
kW
18.4
25.8
33.1
42.3
Flue gas temperature
1)
Full load
°C
72
72
72
72
Partial load 40 %
°C
40
40
40
40
Flue gas mass flow rate
Full load
kg/s
0.0198
0.0277
0.0357
0.0458
Partial load 40 %
kg/s
0.0079
0.0111
0.0143
0.0183
CO
2
content, gas
%
10
Tab. 7 Unit data
Δ
p
H
[mbar]
V
H
[m
3
/h]
6 720
8
04
3
54-17.1ITL
100
10
1
1
10
100
0,7
0,6
0,5
0,4
0,
3
0,2
0,1
0
20
3
0
40
50
60
70
ϑ
K
[°C]
q
B
[%]
6 720
8
04
3
54-16.1ITL
