Riello 466 M1 Installation, Use And Maintenance Instructions page 47

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 mo-
tor Fig. 3:
Blue lever:
adjustment not necessary. Positioned by the factory
on the vertical of the motor axis. It maintains the shut-
nd rd
ters of 2 and 3 stage closed during the 1
operation and in the stop periods. Do not turn clock-
wise (–) the lever to avoid crawlings of the air shut-
ters, turning the lever anticlockwise (+) the motor will
be in different position during the passage from 2
st
1 stage or during the 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
always to anticipate the orange lever.
The control of the 3
through one of the cam next to the red lever.

4.5 ELECTRODE POSITIONING
Position the electrodes according to the dimensions
shown in Fig. 4.
2915842
st
nd
stage oil valve. It has
rd
stage valve is automatic
Fig. 2
Air shutter position 2
nd rd
2 and 3 stage air shutter motor
Sector A 1
stage
Fig. 3
nd
to
MV2 - Black lever
ST3 - Red lever
ST2 - Orange lever
0 - Blue lever
4 mm
D11353
9
GB
D2742
nd rd
and 3 stage
st
stage air shutter
Black lever has to anticipate
the orange one
Opening + – Closing
1 5 mm
D2745
Fig. 4