Potterton Performa 24i HE Installation And Service Instructions Manual page 39

12.0 CHANGING COMPONENTS
12.24 Secondary Heat Exchanger (Fig. 73)
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.
12.25 Flue Overheat Thermostat (Fig. 74)
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.
Publication No. 5111813
Secondary
Heat Exchanger
Pipe Connecting Clip
Fan Spigot Outlet
Pipe Clamp
Elbow
Fan Outlet Pipe
Fig. 73
Ease Fan Spigot Outlet
Pipe Clamp Inwards
Fan Spigot Outlet Pipe
Boiler Return Pipe
Heat Exchanger
Return Pipe
Fig. 74
Overheat Thermostat
Outer Drum
39