Riello DB 4 LSM C13, Installation, Use And Maintenance Instructions

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16
CHAPTER
5
Preparation for start up
5.3 Servomotor adjustment (SQM 40)
The servomotor ( Fig. 18 ) adjusts at the same time through re-
turns, air flow and pressure of the fuel in use.
Completes a rotation of 90° in 30 s. After the adjustment
made in the factory to its 6 cams to allow an initial ignition.
Check that they are as shown below.
In the event of a modification, follow what is described below
for each cam:
Cam I (RED): 135° (The same for all models)
Limits the rotation towards the maximum.
Cam II (BLUE): 0° (The same for all models)
Limits the rotation towards the minimum.
With the burner off the air damper
should be completely closed: 0°
Cam III (ORANGE): 20° (The same for all models)
Adjusts the start up position and the mini-
mum output of the fuel 1 (for
single fuel
burners).
Cam IV (YELLOW): 130° (The same for all models)
Adjusts the position of the maximum output
of the fuel 1 (for single fuel burners).
Cam V (BLACK): 20° (The same for all models)
Adjusts the minimum output and ignition po-
sition of the fuel 2 (for dual fuel burners).
Cam VI (GREEN): 130° (The same for all models)
adjusts the Max. output position of the fuel 2
(for dual fuel burners).
Do not make any adjustments.
It is recommended that no adjustments are
made.
VI
V
IV
III
II I
0
8
00 35
1
L
SQM4
0
SQM41
R
90
60
60
90
30
13 5
00
R
Fig. 18
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