5
20013654
GB
COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC 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 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.
RECOMMENDED NOZZLES:
Monarch type R
Delavan type W - B
Steinen type S - Q
Danfoss type 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
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 reg-
ulating 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 left, the combustion head is
set for an output of 1.50 GPH at 12 bar, while
the shutter is level with set-point
3
, 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 (see fig. 3, page 6).
Nozzle
Pump pressure
Burner output
Comb. head
adjustment
Air damper
adjustment
GPH
Angle
bar
kg/h ± 4%
Set-point
Set-point
1.10
60°
12
4.4
2
3
1.25
60°
12
5.0
2.5
3.4
1.50
60°
12
6.0
3
3.8
1.75
60°
12
7.0
4
4
2.00
60°
12
8.0
5
5
2.25
60°
12
9.0
6
6
2.50
60°
12
10.0
6
7
1
2
3
4
1
For 2.00 - 2.25 GPH nozzles it is
advisable to use, if possible,
full cones.
2
Blast tube
Regulating rod
Shutter
Terminal plane of the blast tube
D5398
2
1
3
5
3
