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SUN G3
2.4 Nozzle and electrodes
Choosing the nozzle
Determine the required fuel flow-rate, based on the
heat input of the boiler and the minimum heat output
(Hi) of the fuel used (see table of technical specifications,
Chap. 4). Based on the flow-rate calculated, use the table
below, according to the pump pressure, to determine
the most suitable nozzle size (in GPH). The bold values
in the table are the most suitable for the operation of
the burner. In the case of burners with preheater, the
effective flow-rate value is lower by around 10% than
the values shown in table.
Table of oil nozzle flow-rates
The values shown below are purely indicative,
as it should be remembered that the flow-rates
of the nozzles may change by ± 5%.
Table of spray values
The nozzles are available with different sprays, identified by one or more letters, depending on the
manufacturer. The table shows the most suitable types of spray for the burner.
SPRAY
Assembling the nozzle
Once the correct nozzle has been selected, proceed as follows for the assembly:
1 Disconnect the oil supply pipe "A"
2 Remove the photo cell "7" and disconnect the cables from the ignition electrodes "C"
3 Loosen the two fastening screws "E"
4 Turn and remove the combustion head "F"
5 Remove the nozzle holder from the combustion head "F"
6 Replace the nozzle "G"
GB
Angle
Type of cone
Delavan
60°
Full
Cod. 3540C043 - Rev. 01 - 02/2015
Nozzle G.P.H.
0,40
0,50
0,60
0,65
0,75
Type of nozzle
Monarch
Danfoss
S
B
AR
fig. 5
Pump pressure (bar)
9
10
11
12
13
1,59
1,67
1,73
1,44
1,52
1,80
1 ,90
1,99
2,08
2,17
2,16
2,28
2,39
2,50
2,60
2,34
2,47
2,59
2,71
2,82
2,70
2,85
2,99
Flow-rate at the outlet in kg/h
Steinen
Hago
Fluidics
S - SS
ES
SF - S
14
1,80
2,25
2,70
2,92
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