Technical data

14.0 Changing Components

14.23 Secondary Heat Exchanger) (Fig. 80)

1. Drain the primary circuit

2. Undo the four screws securing the right hand case panel.

Remove the panel.

3. Prise the connecting clips from the heat exchanger return

pipe and the boiler return pipe. Remove the pipes.

4. Slacken the screws on the left hand fan spigot outlet pipe

clamp. Ease the clamp to the right.

5. Remove the nut securing the elbow to the secondary heat

exchanger. Draw the elbow and outlet pipe forwards.

6. Remove the secondary heat exchanger from the outer

drum by easing it forward.

7. Reassemble in reverse order of dismantling.

14.24 Flue Overheat Thermostat (Fig. 81)

NOTE: The flue overheat thermostat includes a reset

button. Check that the thermostat will not reset before

replacing.

1. Remove the fan spigot outlet pipe from the fan and elbow.

2. Pull the two wires off the terminals on the flue overheat

thermostat. Unscrew the thermostat from the adaptor in the

outlet elbow.

3. Reassemble in reverse order of dismantling.

Ease Fan Spigot Outlet Pipe

Clamps Inwards

Fan Spigot Outlet Pipe

Overheat Thermostat

Fan Spigot Outlet

Pipe Clamp

Fan Spigot

Outlet Pipe

Secondary

Heat Exchanger

Outer Drum

Boiler Return Pipe

Pipe Connecting Clip

Elbow

Heat Exchanger

Return Pipe

Fig. 80

Fig. 81

28 model

18 & 24

model