PART IV: MAINTENANCE
44
Note:
to replace the combustion head reverse the procedure described above having care to place correctly the O ring (
OR
) between
burner and gas manifold.
Electrodes Adjustment
Important Note: Check the ignition and detection electrodes after removing/adjusting the combu-
stion head.
ATTENTION: avoid the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), other-
wise the boiler’s operation would be compromised. Check the electrodes position after any intervention on the
combustion head.
C
G
AR
V
C
G
A
O
VR
Key
VRT
Head adjusting screw
AR
Threaded rod
V
Fixing screw
G
Gas manifold
OR
”O” ring
C
Cover
A
A = 2 ÷ 3 mm
R = 60 mm
X=6~
Y=7~
~R
A
A =
Ignition electrodes
R =
Detection electrode
