Combustion Head Adjustment; Positioning The Pilot Electrode - Riello DB 6 LSM C13 Installation, Use And Maintenance Instructions

4.11

Combustion head adjustment

The air damper servomotor, in addition to varying the air flow rate
according to the output demand, through a leverage mechanism
varies the combustion head adjustment.
This system allows an optimum adjustment also at the minimum
firing rate.
Similarly to the servomotor rotation, it is possible to vary the
opening of the combustion head moving the tie-rod (Fig. 21) on
the holes 1-2-3.
D8419
4
3
2
1
0
4000
4.12

Positioning the pilot electrode

Position the electrode as shown in Fig. 23.
WARNING
4400 5000 5400 5800
Installation
The selection of the hole (1-2-3) to be used is determined by the
diagram (Fig. 22) based on the maximum output requested. In
the factory, the hole is adjusted for the maximum stroke (hole 3).
In the event that, in boilers with high back pressure, also with the
damper completely open, the air output is not enough, it is possi-
ble to carry out a calibration different to the one indicated by the
diagram Fig. 22, moving the tie-rod to the next numerically higher
hole, thereby increasing the opening of the combustion head and
therefore the air flow rate.
6200 6600 7000
Max. burner output
D3899
20 GB
S9476
7400 7800 8200 kW
Fig. 21
Fig. 22
Fig. 23
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