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Following items do not need, generally, any further adjustment:
A - Servomotor
B - Pump
C - Motor over load relay
D - Timer
A - SERVOMOTOR
Fig. 2
The servomotor controls contemporaneously the air delivery and pressure and the fuel delivery.
It is provided with three adjustable cams, controlling the corresponding switches.
st
1
cam:
it controls the stroke of the servomotor at the position of 0°. When the burner is off the air damper is
completely closed.
nd
2
cam:
it controls the stroke of the servomotor at the position of 130°.
rd
3
cam:
it controls the minimum modulating output, leaves the factory set a 20°.
B - PUMP
Set by the factory at 25 bar.
The pump priming is possible by loosening the tap (5) of the vacuometer plug (see fig. 1).
5507
BURNER ITEMS SET BY THE FACTORY
D1999
10
st
1 - 1
Cam (blue)
nd
2 - 2
Cam (red)
rd
3 - 3
Cam (black)
4 - Pointer
5 - Clamp
6 - Motor reset lever
GB
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