30
31
Picture 13 shows a twin-pipe fuel oil supply system.
When oil is fed from a tank, the return pipe must end at the same
height as the feeding pipe.
Should the return pipe be positioned above the oil level, a non
return valve is to be installed on the feeding pipe to prevent it from
emptying.
The burner performs best when the return pipe is immersed in the oil.
Picture 14 refers to a single-pipe system.
Di = Inside diameter of pipe
L = Max. length of oil intake pipe
H = level difference
Di = Inside diameter of pipe
L = Max. length of oil intake pipe
H = level difference
pic. 14
pic. 13
4.4. Combustion adjustment
When regulating combustion, adhere to the CO2, flue gas tem-
perature, Bacharach index and oil pressure values shown on the
technical data charts.
The burner combustion head is a fixed type and does not require
adjustment.
Combustion air can be adjusted by turning the socket screw A
shown in pic. 15. The setting is shown on the relevant, graduated
scale B.
The oil pressure can be adjusted by turning screw 5 in pic. 11.
Refer to the technical data charts for the required value.
WARNING
Each installation has its own setting, it cannot be predicted
in advance: that is the combustion needs to be adjusted once
the system is installed.
4.5. Removing the nozzle
Proceed as follows to remove the nozzle:
- remove the two screws V in pic. 12, and the burner head;
- remove the electrodes by taking off screw A in pic. 13;
- remove the nozzle using one 17 mm and one 16 mm spanner.
4.6. Adjusting the electrodes
It is essential to keep to the correct distance between the electro-
des, and between the nozzle and the electrodes, for best burner
operation (pic. 13).
pic. 15
WARNING
A cut-off valve (manual or solenoid) must be fitted on the oil supply pipe.
The burner hose pipes must be inspected regularly.
pic. 16
H
max 4 m
H
max 4 m
H
V
C
A
B
