Servomotor Adjustment - Riello RLS 70 Manual

6.9

Servomotor adjustment

The servomotor (Fig. 38) adjusts the air damper.
Do not alter (for the moment) the factory setting for the 4 levers.
A graduated label with 4 coloured sectors shows the intervention
point of the levers.
It is equipped with 4 levers:
It adjusts the position of the air damper with
BLUE LEVER:
the burner at rest: air damper closed.
It adjusts the position of the air damper with
ORANGE LEVER:
the burner operating in 1st stage.
It adjusts the position of the air damper with
RED LEVER:
the burner operating in 2nd stage.
Determines when the 2nd stage gas or light oil
valve opens.
It must always intervene (slightly) before the
red lever and after the orange lever.
It must not intervene with the red lever, to
prevent the gas or light oil valve from not
opening at all.
BLACK LEVER:
It must not intervene immediately after the
orange lever, to prevent a combustion with an
air defect.
To approach the moment of the gas or light oil
valve opening at the damper 2nd stage
position, turn the black lever toward the left; to
postpone the moment of the opening, turn the
lever toward the right.
Start-up, calibration and operation of the burner
Summarising, the lever must intervene according to the following
sequence:
1° Blue lever
2° Orange lever
3° Black lever
4° Red lever
BLACK
RED
ORANGE
BLUE
33 GB
D1195
Fig. 38
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