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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.
2
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 2 at sea level and with gas oil and room temperature of 20 °C.
Nozzle
GPH
Angle
1.75
60°
2.00
60°
2.25
60°
2.50
60°
3.00
60°
3.50
60°
3.50
60°
4.2 RECOMMENDED NOZZLES
Delavan type W - B ; Danfoss type S - B
Monarch type R
; Steinen type S - Q
For 3.00 - 3.50 GPH nozzles it is advisable to use
full cones.
TO FIT NOZZLE CARRY OUT THE FOLLOW-
ING ACTIONS (See fig. 11):
Remove nozzle-holder assembly (1) after loos-
ing screws (2) and nut (3), remove the small ca-
b l e s ( 4 ) f r o m t h e c o n t r o l b o x a n d t h e
photoresistance (6).
Withdraw the small cables (4) from the elec-
trodes, remove the diffuser disc-holder assembly
(10) from the nozzle-holder assembly (1) after
loosing screw (3, fig. 12, page 7).
Screw the nozzle (11) correctly and tighten it as
shown in the figure.
ATTENTION
During the reassembly of the nozzle-holder assem-
bly screw the nut (3) as shown in the figure below.
TIGHTEN WITHOUT MOVING
BACKWARDS TO THE END
2308
Pump
Burner
pressure
output
bar
kg/h ± 4%
12
7.0
12
8.0
12
9.0
12
10.0
12
12.0
12
14.0
14
15.2
D5684
3
Combustion head
adjustment
Set-point
0
1
3
3.5
5
6
6
6
GB
Air damper
adjustment
Set-point
1.3
2.3
2.6
3.0
3.5
4.4
5.6
Fig. 11
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