Riello 466 M1 Installation, Use And Maintenance Instructions page 46

4. WORKING
4.1 CHOICE OF NOZZLES
First of all state the maximum output required with all three
nozzles in operation.
On the base of the maximum output choose, from table A,
three related nozzles.
Nozzles: 60° - Pump pressure: 25 bar.
rd
3
The references of table B should be followed in case of
need of:
- modification of the pump pressure in order to vary the
output,
- diverse composition of the 3 nozzles group,
- knowledge of the output in 1
4.2 PUMP PRESSURE
The pump pressure is referred to all three nozzles operating.
The pump pressure increases automatically when two noz-
zles are operating and becomes higher with only one nozzle.
Suggested pressure:
- Light oil: 25 bar
- Heavy oil: 28 bar (transformation kit)
Rated nozzles deliveries are listed on the table. 
A tolerance of ±5% concerns the real delivery against the
rated one. 
The pump leaves the factory set at 25 bar.
4.3 COMBUSTION HEAD ADJUSTMENT
On the base of the maximum delivery detect, from dia-
gramm C, the combustion head adjustment.
The adjustment should be made by turning the screw A till
the set-point (see diagram) is on the line with the washer B.
2915842
st
1
nd
2
D2741
st nd
and 2 stage.
B
Set-point 6
A
D2743
A
NOZZLES
GPH 60°
st
1
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
B
C
kg/h
8
GB
Total output
st
kg/h 1 +2
nd rd
2 3 25 bar
3.50 3.50 66
4.00 4.00 75
4.50 4.50 84
5.00 5.00 96
5.50 5.50 105
6.00 6.00 114
6.50 6.50 123
7.00 7.00 132
7.50 7.50 141
25 bar 28 bar
GPH
kg/h
3.50 22
4.00 25
4.50 28
5.00 32
5.50 35
6.00 38
6.50 41
7.00 44
7.50 47
Set-point
nd rd
+3
28 bar
70
79
90
99
111
120
132
141
–
kg/h
23.5
26.5
30
33
37
40
44
47
50
D2742