Riello RL 28/M Instrucciones De Instalación, Funcionamiento Y Mantenimiento página 12

(A)
(B)
(C)
D871
D869
D793
11
Adjusting air delivery
Two shutters 1) and 2) are provided to adjust the
air. These shutters are factory set to maximum
opening.
Firstly adjust shutter 2) which must be closed
gradually until optimum combustion is obtained.
If total closure of shutter 2) is not sufficient, also
close shutter 1) (secondly) as follows:
vary the final profile of the lower cam 4)(B) via
the screws 5) inside the opening 6).
If the burner is operated at maximum power, the
fan air may not be sufficient even with both shut-
ters 1) and 2) fully open. In this case, remove
shutter 2) and adjust the air using shutter 1) only
as described above.
Cams 7) - 4)(B):
- tighten screws 8)-5) to increase air delivery;
- unscrew screws 8)-5) to reduce air delivery.
2 - MIN power
The MIN power must be chosen from within the
working range given on page 4. Press the "-"
button 2)(A) page 10 and keep it pressed until
the servomotor has reached 15° (factory set-
ting).
Nozzle flow rate adjustment
The nozzle flow rate is given in diagram (C)p.10
corresponding to the pressure on the nozzle
return read on the pressure gauge 10)(B). To
vary the nozzle minimum flow rate, modify the
initial profile of the upper cam 7)(B) via the
screws 8).
Adjusting air delivery
Modify the initial profile of the lower cam 4)(B) via
the screws 5) inside the opening 6).
If possible, do not rotate the first screw as this is
the one that provides for total closure of the air
shutter.
3 - INTERMEDIATE power
Air/oil flow rate adjustment
Slightly press the "+" button 2)(A) page 10 so that
a new screw 5)(B) appears inside the opening
6)(B).
Adjust screw 8)(B) which varies the profile of the
upper cam 7) and the corresponding screw 5)
which controls the lower cam 4) until you obtain
optimum combustion.
Proceed in the same way with the next screws
except for the last one, previously adjusted to ob-
tain maximum power.
Ensure that variation of the cams profile is grad-
ual.
Turn the burner off via switch 1)(A) page 10,
OFF position, release the cam with variable pro-
file by setting the servomotor notch 2)(B) to the
vertical position and check that the movement is
smooth by manually rotating the cam backwards
and forwards several times.
NOTE
Cams I - II - IV of the servomotor do not require
adjustment. Only cam III may need adjusting. In
this case, remove the cover 1)(C), which clicks in
and out, take the key 2) out and insert it in the
notch on cam III.
The servomotor follows the adjustment of cam
III only when the cam angle is reduced. If you
need to increase the cam angle (15..16..17°..),
first increase the servomotor angle via the "+"
button, then increase the angle of cam III and
finally reset the servomotor to the MIN power
position via the "-" button.