Combustion Adjustment; Nozzles Recommended; Combustion Head Setting - Riello 40 G20S Instrucciones De Instalación, Montaje Y Funcionamiento

COMBUSTION ADJUSTMENT

In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjust-
ment and testing must be carried out observing the instruction manual of the boiler, including verifica-
tion of the CO and CO
temperature of the water in the boiler.
To suit the required appliance output, fit the nozzle then adjust the pump pressure, the setting of the
combustion head and the air damper opening in accordance with the following schedule.
The values shown in the table are measured on a CEN boiler (as per EN 267).
They refer to 12.5% CO
Nozzle
pressure
1
GPH Angle
2.00 60°
2.25 60°
2.50 60°
3.00 60°
3.50 60°
4.00 60°
4.50 60°
4.50 60°
1

NOZZLES RECOMMENDED:

Angle
2

COMBUSTION HEAD SETTING

(See fig. 2 and 3)
This is done when fitting the nozzle, with
the blast tube removed. It depends on
the output of the burner and is carried
out by rotating the regulating rod, till the
terminal plane of the blast tube is level
with the set-point, as indicated in the
schedule.
In the sketch on the right, the combus-
tion head is set for an output of 3.50
GPH at 12 bar, while the shutter is level
with set-point 3.5, as required by the
above schedule.
Combustion head settings indicated in the schedule are valid for most cases.
The setting of the fan output according to the installation should normally be done only through the air
damper. Should one subsequently want to retouch also the setting of the combustion head, with the
burner running, operate on the rod (1) with a 6 mm spanner (2) as follows:
2406
concentration in the flue gases, their temperatures and the average
2
at sea level and with light oil and room temperature of 20 °C.
2
Pump Burner
output
bar kg/h ± 4%
12 8.0
12 9.0
12 10.0
12 12.0
12 14.0
12 16.1
12 18.1
14.5 19.9
Monarch type R - PLP ; Delavan type B - W
Steinen
In most cases. Particularly suited to avoid flame-detach-
: 60° -
ment during ignition.
For narrow and long combustion-chambers it is advisable
to use full cone nozzles (e.g. 60° B).
:
Comb. head Air damper adjustment
adjustment
2
Set-point
1
1.5
2
2.5
3.5
4
5
6
type S - SS ; Danfoss type S - B
Terminal plane of the blast tube
D5284
Blast tube
6
GB
Low-flame High-flame
Set-point Set-point
1.8 2.0
2.1 2.5
2.4 2.8
2.8 3.2
3.2 4.0
3.6 5.0
4.0 6.0
4.5 7.0
2
5 3 1
Regulating rod
Shutter
3
Fig. 2