50
18.2.7 Removing the heat exchanger
1. Drain down the boiler;
2. Carry out step 18.1.1;
3
.
R
emove the air gas manifiold as
in 18.2.1 (Fig. 76);
4. Unscrew the three bolts M from
the main heat exchanger (Fig.
77);
5 .Remove the flow and return
pipes and the condense drain
pipe from the heat exchanger.
(Fig. 78)
6. Remove the heat exchanger
from the boiler by sliding it
forwards. (Fig. 79);
7. Reassemble in reverse order.
18.2.8 Removing the spark generator
1. Carry out step 18.1.1;
2. Disconnect the earth cable from
the ignition electrode. (Fig. 80);
3. Disconnect the ignition
electrode, live, neutral and earth
cables from the ignitor. (Fig. 81);
4. Remove the two screws N from
the ignitor and remove (Fig. 82);
5. Reassemble in reverse order.
Fig. 76
Fig. 77 Fig. 78
Fig. 79
Fig. 80
Fig. 81
Fig. 82
M
N