2664
6
GB
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
2
concentration in the flue gases, their temperatures and the average temperature of
the water in the boiler.
To suit the required appliance output, fit the proper nozzle, then adjust the pump pressure and the
a
ir 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
2
at sea level and with gas oil and room temperature of 20 °C.
TYPE
Nozzle
Pump pressure
Burner
output
Air damper adjustment
GPH Angle bar kg/h ± 4%
Set-point
510 T3
0.50 70° 12 2.0 2.2
0.55 60° 12 2.2 2.8
0.60 60° 12 2.4 3.1
0.65 60° 12 2.6 3.9
0.75 60° 12 3.0 8
RECOMMENDED NOZZLES : Monarch type R - NS ; Delavan type W - E
Steinen type H - Q ; Danfoss type H - S.
PUMP PRESSURE: 12 bar - The pump leaves the factory set at this value
14 bar - Improves flame retention; it is therefore suitable for ignitions
at lo
w temperatures.
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
a
ir damper (3), after loosing the screws (4). When the opti-
mal regulation is reached, s
crew 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
it
s metal cover fitted and the combustion chamber with “zero”
depression.
These regulations are purely indicative.
Each installation however, has its own unpredictable working
con
ditions: 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.
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