Combustion Chamber Insulation Panels; Boiler Thermostat - Potterton Ultra 2 Installation & Service Instructions Manual

Replacement of Parts - Page 48
6.18 Combustion Chamber
Insulation Panels
1. Gain General Access - See Section 6.1 complete.
2. Remove the fan/diverter assembly - see Section 6.17.
3. Remove the four remaining screws securing the
combustion chamber insulation cover and remove the
cover.
30-60 Models: Remove the two long screws at the
back & slide out the flue hood if the rear insulation
needs to be removed.
80 Model: Remove 2 screws each side.
4. Slide out the damaged insulation panel(s) and carefully
replace with new one(s).
The rear panel should be lifted up a few mm then pulled
forwards out of its bottom locating channel.
Note: For some models it may be necessary to remove
the burner first - refer to Section 6.16.
5. Re-assemble in reverse order.

6.19 Boiler Thermostat

1. Gain General Access - See Section 6.1 complete.
2. Remove the two screws securing the thermostat to its
mounting bracket.
3. Withdraw the boiler thermostat and disconnect the
electrical plugs.
4. Remove the split pin and withdraw the thermostat
capillary from the flow pipe (left hand side of the
boiler).
5. Re-assemble in reverse order. Ensure the electrical
plugs are connected as shown and that the thermostat
capillary routed through the cable tie
(see Fig 40 / 41) and is smeared with heat conductive
grease. Ensure that the split pin is re-fitted.