C.I.B. UNIGAS
- M039240CA
33
Removing the combustion head
z
Remove the cover
C
.
z
remove the electrodes cables;
z
unscrew the 3 screws
V
which hold in position the gas manifold
G
and pull out the complete group as shown in the picture below.
z
Clean the combustion head by a compressed air blow or, in case of scale, scrape it off by a scratchbrush.
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.
Adjusting the electrodes
Important Note: Check the ignition and detection electrodes after removing/adjusting the combustion head.
The gap between the ignition electrodes must be
4mm
(see picture below).
Fig. 16
Key
VRT
Head adjusting screw
AR
Threaded rod
V
Fixing screw
G
Gas manifold
OR
”
O” ring
C
Cover
ATTENTION:
avoid
the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), otherwise the boi-
ler’s operation would be compromised. Check the electrodes position after any intervention on the combustion head.
V
C
G
AR
OR
VRT
C
AR
G
Fig. 17
-
R512A
R515A
R520A
R525A
A
534 mm
519 mm
515 mm
515 mm
