Combustion Adjustment; Air Damper Adjustment - Riello 40 G3 Installation, Use And Maintenance Instructions

COMBUSTION ADJUSTMENT

In conformity with Efficiency Directive 267 EN the application of the burner on the boiler, adjustment
and testing must be carried out observing the instruction manual of the boiler, including verification of
the CO and CO concentration in the flue gases, their temperatures and the average temperature of
2
the water in the boiler.
To suit the required appliance output, fit the proper nozzle, then adjust the pump pressure 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
1
GPH Angle
0.50
0.55
0.60
0.65
0.75
1
RECOMMENDED NOZZLES : Monarch type R - NS ; Delavan type W - E
2
PUMP PRESSURE: 12 bar - The pump leaves the factory set at this value
3

AIR DAMPER ADJUSTMENT :

The mobile air damper (1) operated by the jack (2) assures
the complete opening of the air intake.
The regulation of the air-rate is made by adjusting the fixed
air damper (3), after loosing the screws (4). When the opti-
mal regulation is reached, screw tight the screws (4) to
assure a free movement of the mobile air damper (1).
The settings indicated in the schedule refer to the burner with
its metal cover fitted and the combustion chamber with "zero"
depression.
These regulations are purely indicative. 
Each installation however, has its own unpredictable working
conditions: actual nozzle output; positive or negative pressure
in the combustion-chamber, the need of excess air, etc.
All these conditions may require a different air-damper 
setting.
2664
at sea level and with gas oil and room temperature of 20 °C.
2
Pump pressure
2
bar
70° 12
60° 12
60° 12
60° 12
60° 12
Steinen type H - Q ; Danfoss type H - S.
14 bar - Improves flame retention; it is therefore suitable for ignitions
at low temperatures.
Burner
output
kg/h ± 4%
2.0
2.2
2.4
2.6
3.0
1
4
6
GB
Air damper adjustment
3
Set-point
2.2
2.8
3.1
3.9
8
D5778
2
3
4