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. 1.15

To replace, repeat the steps in reverse order, paying

particular attention to the following:

a - Centre the electrode in the positioning hole carefully,

otherwise the electrode may break;

b -Ensure that the left hand and right hand electrodes are

located the correct way round (facing each other), to

give the correct spark gap;

c - Check that the cables have been connected correctly;

d -Check that the rubber gasket covers the cable/ electrode

connection point completely.

1.3.4 Removing the main heat exchanger

1. Drain the boiler of water;

2. Remove the overheat thermostat sensor, D.H.W. sensor

and heating sensor "I" (F

3. Release the four connection nuts "J" connecting the

exchanger to the flow and return pipes (F

4. Pull it straight out (F

. 1.16

. 1.17);

. 1.19).

. 1.18);

Fig. 1.17

. 1.18

. 1.19