Servomotor Adjustment; Change Of Fuel - Riello RLS 190/M MZ Installation, Use And Maintenance Instructions

6.8

Servomotor adjustment

Important notes
To avoid accidents, material or environmental
damage, observe the following instructions!
Avoid opening,
ATTENTION
actuators.
 All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
 Before modifying the wiring in the connection area of the
servomotor, fully disconnect the burner control device from
the power supply (omnipolar separation).
 To avoid the risk of electrocution, protect the connection
terminals in a suitable manner and correctly fix the cover.
 Check the wiring is in order.
 Falls and collisions can negatively affect the safety
functions. In this case, the servomotor must not be operated,
even if it displays no evident damage.
Assembly notes
• Check the relevant national safety standards are respected.
• When assembling the servomotor and connecting the
damper, the gears can be disengaged by means of a lever,
allowing the drive shaft to be easily adjusted in both
directions of rotation.
The servomotor provides simultaneous adjustment for the air
damper, by means of the adjustable profile cam and the gas
butterfly valve.
The servomotor rotates 130° in 42 s.
6.9

Change of fuel

There is a change of fuel options:
1 with selector 10)(Fig. 6 on page 12);
Change the fuel only when the burner is off.
ATTENTION
Start-up, calibration and operation of the burner
modifying or forcing
Do not alter the factory setting for the 5 cams; just check that they
are as specified below:
Cam I: 130°
the
Cam II: 0°
Cam III: 30° (gas)
Cam IV: 30° (oil)
Cam V: 90°
29 GB
Limits rotation toward maximum
position.
When the burner is operating at
MAX output, the gas butterfly
valve must be fully open: 90°.
Limits rotation toward minimum
position.
When the burner is shut down,
the air damper and gas butterfly
valve must be closed: 0°.
Adjusts the ignition position and
the MIN output.
Adjusts the ignition position and
the output of the 1st stage.
Determines when the 2nd stage
light oil valve opens.
D3923
Fig. 38
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