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48
Fig. 67 Fig. 68 Fig. 69
Fig. 70
Fig. 71
Fig. 72
Fig. 73
J
K
L
18.2.5 Removing the fan
1. Carry out step 18.1.1;
2
.
R
emove the air gas manifiold as in
step
18.2.1 (Fig. 67);
3. Unscrew the two screws from the
v
enturi
J a
nd remove with the gas
valve (Fig. 68);
4. Unscrew the three screws K on the
a
ir/gas pipe and remove (Fig. 69);
5. Reassemble in reverse order.
18.2.6 Removing the gas valve
1. Carry out step 18.1.1;
2. Remove the air gas manifiold as in
18.2.1 (Fig. 70);
3. Unscrew the three screws L on the
air/gas pipe and remove (Fig. 71);
4. Unscrew the three screws holding
the gas valve on the venturi (Fig.
72);
5. Remove the gas valve from the
venturi. (Fig. 73)
;
6. Reassemble in reverse order;
7. The gas valve settings will need to
be adjusted (see Section 14.3 page
28);
8. Reinstate the gas supply and test for
tightness on reassembly.