To define flue gas percentage
1. First measure the amount of O
2
in the flue gas/combustion air mixture. The optimal
measuring point is the burner wind box.
2. Measure the residual O
2
in flue gas.
3. Read the FGR percentage value in the diagram below.
0%
2%
4%
6%
8%
10 %
12 %
14 %
16 %
18 %
20 %
17,5 %
18,0 %
18,5 %
19,0 %
19,5 %
20,0 %
20,5 %
21,0 %
FGR
-%
Mixture O2 content (dr y), %
Natural gas combustion,
Flue Gas Recirculation
(%)
Flue gas O2 = 2 %
Flue gas O2 = 3 %
Flue gas O2 = 4 %
FGR natural gas ver. 1
FGR may cause unstable combustion. To avoid noise, vibration or other disturbance,
the settings must always be defined for each burner separately.
4.26 Capacity range
Burner capacity range can be set as required at service level. The minimum capacity
can be larger than the first curve point, and the maximum capacity can be larger than
the last curve point. During start-up, the burner runs from ignition capacity to minimum
capacity, and continues to normal operation. Ignition capacity can be smaller or larger
than the first curve point capacity or it can be the same.
Set minimum and maximum capacity for each fuel individually from menu as follows:
Description
Params. &
Display
RatioControl
GasSettings
M5178 1647EN
73 (129)
Содержание GKP-350 M
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