Riello 3808511 Installation, Use And Maintenance Instructions page 29

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.
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4.4 AIR SHUTTERS ADJUSTMENTS
The adjustment of the air shutters shall be set each time,
with reference to the nozzles deliveries and the combustion
chamber pressurization.
Fig. 2 shows the positioning of the air shutters.
Fig. 3 shows the positioning of the cams of the motor.
st
1 STAGE adjustment:
manual regulation carried out by acting on the sector A,
fig. 2.
nd rd
2 - 3 STAGE adjustment:
carried out by acting on the coloured levers of the motor
fig. 3:
Blue lever:
adjustment not necessary. Positioned by the factory on
the vertical of the motor axis. It maintains the shutters of
nd rd
2 and 3 stage closed during the 1
and in the stop periods. Do not turn clockwise (–) the le-
ver to avoid crawlings of the air shutters, turning the lever
anticlockwise (+) the motor will be in different position
during the passage from 2
stop.
Orange lever:
nd
for 2 stage air shutters adjustment, it is adjustable both
in opening and in closing position.
Red lever:
rd
for 3 stage air shutters adjustment, it is adjustable both
in opening and in closing position.
Black lever:
it controls the opening of the 2
ways to anticipate the orange lever.
rd
The control of the 3
one of the cam next to the red lever.
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B
Set-point 6
A
st
stage operation
nd st
to 1 stage or during the
nd
stage oil valve. It has al-
stage valve is automatic through
kg/h
C
Fig. 2
Air shutter position 2
nd rd
2 and 3 stage air shutter motor
Sector A 1
Fig. 3
MV2 - Black lever
ST3 - Red lever
ST2 - Orange lever
0 - Blue lever
7
GB
Set-point
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nd rd
and 3 stage
st
stage air shutter
Black lever has to anticipate
the orange one
Opening + – Closing
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