Min Power; Intermediate Power - Riello RL 28/M Electrical Installation, Use And Maintenance Instructions

(A)
(B)
D871
D2523
10
Adjusting air delivery
Two shutters 1) and 2) are provided to adjust the air.
These shutters are factory set to maximum opening.
Firstly, with burner at maximum operation, adjust shutter
2) which must be closed gradually until optimum com-
bustion is obtained. If total closure of shutter 2) is not suf-
ficient, 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 shutters 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 5. Press the "-" button 2)(A) page 9
and keep it pressed until the servomotor has reached
15° (factory setting).
Nozzle flow rate adjustment
The nozzle flow rate is given in diagram (C)p.9 corre-
sponding 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 damper.

3 - INTERMEDIATE power

Air/oil flow rate adjustment
Slightly press the "+" button 2)(A) page 9 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 obtain maximum
power.
Ensure that variation of the cams profile is gradual.
Turn the burner off via switch 1)(A) page 9, OFF posi-
tion, release the cam with variable profile by pressing
the reset button 2)(B) and check that the movement is
smooth by manually rotating the cam backwards and
forwards several times.
NOTE
Red and blue cams of the servomotor do not require ad-
justment. Only orange cam may need adjusting.
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 servomo-
tor angle via the "+" button, then increase the angle of
orange cam and finally reset the servomotor to the MIN
power position via the "-" button.