Service And Maintenance - Ferroli SUN G20 Instrucciones De Uso, Instalación Y Mantenimiento

3. SERVICE AND MAINTENANCE

All the adjustment, commissioning and maintenance operations must be performed by Qualified Per-
sonnel, in compliance with the standards in force. The local sales organisation and Customer Service
Centre is available for any further information.
FERROLI S.p.A. declines all liability for damage to persons and/or things deriving from tampering with
the appliance by non-authorised persons
3.1 Adjustments
Air lock and head adjustments
The head adjustment depends on the burner's de-
livery and is performed by turning the adjustment
screw "B" clockwise or anticlockwise.
This changes the position of the baffle in relation to
the nosepiece and accordingly the air passage.
To adjust the air flow-rate (2nd stage), use screw
"C" after loosening nut "E". At the end of adjust-
ment tighten nut "E". To adjust the air flow-rate
(1st stage), use screw "D" (orange cam).
To limit dispersion to the flue with the
boiler turned off, the burner is equipped
with a gravity-operated air lock that shuts
automatically when the burner stops.
Combustion air adjustments
The air lock is operated by the servomotor.
The fully open/shut positions are adjusted on the
cams, turning anticlockwise to increase the ope-
ning of the lock and clockwise to decrease it.
Cams
Blue cam - Fully closed position 0°.
do not alter
Orange cam - 1st stage air adjustment.
Red cam - Fully open position 70°.
do not alter
Black cam - Signal to open the
2nd-stage solenoid valve.
Key
A Head adjustment pointer
B Head adjustment screw
C 2-nd stage air adjustment screw
D Servomotor for the 1st-stage adjustment and signal to open the solenoid valve
E Nut
32
Servomotor
manual unlock
Black cam
Orange cam
Cod. 35442633 - 01/2007 (Rev. 00)
SUN G20
Servomotor position
indication
Red cam
Blue cam
fig. 7