Combustion-Head Adjustment; Burner Starting - Riello FS20 Typ 569T30 Montage Und Bedienungs Anleitung

COMBUSTION-HEAD ADJUSTMENT

Loose the screw (A), move the elbow (B) so that
the rear plan of the coupling (C) coincides with the
set point.
Tight the screw (A).
Example:
The burner is installed on a 155 kW boiler with an
efficiency of 90%, the burner input is about 172 kW
using the diagram below, the combustion set
point is 3.
kcal/h
kW
240
200,000
220
180,000
200
160,000
180
140,000
160
140
120,000
120
100,000
100
80,000
70,000
80
The diagram is to be used only for initial settings, to improve air pressure switch operation or
improve combustion, it may be necessary to reduce this setting (set point toward position 0).

BURNER STARTING

Air evacuation: it can be obtained by opening the right screw on the pressure test point placed at
the beginning of the valves (see scheme page 4).
REVISION OF THE GAS OUTPUTS
In order to obtain the gas output Qn under normal conditions (0°C - 1013 mbar), correct the out-
put measured at the counter Qr with a corrective factor ( f ):
.
Qn = f Qr
or:
Patm + Pgaz
.
f = 0.2695
Example:
Output measured at the counter= 14 m
Atmospheric pressure . . . . . . . . = 998 mbar
Gas temperature . . . . . . . . . . . = 10°C
Gas pressure. . . . . . . . . . . . . . = 25 mbar
Corrective factor . . . . . . . . . . . = 0.9742
Nominal output . . . . . . . . . . . . = 13.64 m
2056
172
0 1
3
(m /h)
Patm = atmospheric pressure (mbar)
Pgaz = gas pressure at the counter (mbar)
tgaz = temperature at the counter (°C )
273 + tgaz
3
/h
C
A
B
2 3
3
/h
7
GB
D5214
Set point
4 5
S7014