PART IV: MAINTENANCE
48
MultiBloc VD Mounting
Removing the combustion head
Remove the top H.
Slide the UV detector from its housing.
Unscrew the two screws
S
holding in position the washer and then unscrew
VRT
to free the threaded rod
AR
.
Slacken the screws
V
holding the gas manifold
C
, slacken the connectors
B
and remove the complete assembly as shown in
figure.
Note:
for the subsequent assembly carry out the above described operations in the reverse order, checking the correct position of the
OR ring.
Electrodes Adjustment
Important Note: Check the ignition and detection electrodes after removing/adjusting the combustion head.Adjust the electrodes posi-
position
to push
1
2
3
4
5
6
7
1. Position VD on VB, fig. 2+3.
2. Slide VD forward up to the stop, fig. 4.
3. Screw VD on with 2 M5 screws for each, max. 5 Nm/44 in.-lb., fig. 5/6.
4. VD can be mounted rotated by 180°, fig. 7.
VB
VD
OR
V
C
VRT
S
AR
H
B
