LB 429 Blu 170 ÷ 350 P /P AB B
pag.19
HEAD POSITION
SETTING THE FIRING HEAD
BLU 170 - 250 POWER
BLU 170 - 250 AB MIN. AVERAGE MAX.
G 20 - 25 134
G 30 - 31 145
Two stages AIR SERVOMOTOR
( LANDIS & STAEFA SQN 70 )
Remove cover to enter the adjusting cams. Adjust cams through the suitable key (on issue)
and a screwdriver.
I - Adjusting cam (RED) for opening position in
High Flame (max. output)
II - Adjusting cam (BLUE) for air damper
position on burner’s shutdown
III - Adjusting cam (ORANGE) for opening
position in Low Flame
(by the screwdriver)
IV - Adjusting cam (BLACK) to allow the opening of High flame solenoid valve.
AIR ADJUSTEMENT ON-OFF version
To adjust the inlet air flow:
- Loosen screw A.
- Turn air damper B through lever C, till to
obtain the proper air flow, determined
through a combustion analysis.
- Tighten screw A.
MANUAL
RELEASE
SWITCH
Adjustment of the head position allows the combustion parameters to be optimized. The head is adjusted by turning the screw
shown in the figure.
NOTE: THE FIRING HEAD IS ADJUSTED IN BACKWARD POSITION FOR PACKING PURPOSES