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4.
WORKING
4.1
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
concentration in the flue gases, their temperatures and the average temperature of the water in the boiler.
To suit the required appliance output, choose the proper nozzle and 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
Nozzles
GPH
st
nd
1
stage 2
stage
2.00
1.00
2.00
2.00
2.50
2.50
3.00
3.00
4.2 RECOMMENDED NOZZLES
Delavan type W - B; Steinen type Q;
Danfoss type S.
N.B.: If necessary the 1
h a v e a n o u t p u t e x c e e d i n g 5 0 % o f
thetotal output.
NOTE: To achieve CLASS 2 (EN267:1999)
em issions, the foll owing nozzles
have been used:
- hollow-cone model.
TO FIT NOZZLES CARRY OUT THE FOLLOW-
ING ACTIONS: (see fig. 12)
Remove nozzle-holder assembly (1) after
➤
loosing screws (2) and nuts (3), remove the
small cables (4) from the control box and the
photoresistance (5).
Withdraw the small cables (4) from the elec-
➤
trodes, remove the diffuser disc assembly (8)
from the nozzle-holder assembly (1) after
loosing screws (9).
Screw the nozzles (10) correctly and tighten
➤
it as shown in figure.
ATTENTION
During the reassembly of the nozzle-holder as-
sembly screw the nuts (3) as shown in the figure
below.
TIGHTEN WITHOUT MOVING
BACKWARDS TO THE END
2194
at sea level and with light oil and room temperature of 20 °C.
2
Pump
pressure
Angle
bar
1
60°
12
60°
12
60°
12
60°
12.5
st
stage nozzle can
3
D5684
Burner
Combustion
output
kg/h ± 4%
st
nd
stage 2
stage
8.0
12.4
8.0
16.4
10.3
20.5
12.6
25,0
Fig. 12
2
4
3
5
0 2 4 6 8
6
GB
Air damper
head
adjustment
adjustment
st
1
stage
Set-point
Set-point
0
0.25
3
0.15
6
0.3
8
0,6
6
10
7
1
9
2
nd
2
stage
Set-point
2.1
3.0
4.4
6,0
8
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