Unigas R512A, Инструкция по эксплуатации

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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