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6
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 verifi-
cation 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 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
2
at sea level and with light oil and room temperature of 20 °C.
NOZZLES RECOMMENDED: Monarch type R - NS; Delavan
type W - A - E
Steinen type H - Q ; Danfoss type H - B
Angle:60° :in most cases.
80° : in case of flame detachment, during igni-
tions at low temperatures.
PRESSURE 12 bar : the pump leaves the factory set at this value
14 bar : improves flame retention; it is therefore suitable for ignitions at low
temperatures.
COMBUSTION HEAD SETTING: 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 indi-
cated in the schedule.
Nozzle Pump pressure
Burner output
Comb. head
adjustment
Air damper
adjustment
GPH Angle bar kg/h ± 4% Set-point Set-point
0.40 80° 12 1.6 0 2.4
0.50 60°/80° 12 2.0 1 3.1
0.60 60°/80° 12 2.4 2 3.6
0.65 60°/80° 12 2.6 3 3.8
0.75 60° 12 3.0 4 4.0
In the sketch on the left, the combus-
tion head is set for an output of 0.60
GPH at 12 bar, while the shutter is
level with set-point 2, as required by
the above schedule.
2
Blast tube
Regulating rod
Shutter
Terminal plane of the blast tube
D5322
135
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