Technical data

13.0 Changing Components
41
Combustion
Box Base
Central Insulation Panel
Support Bracket
Burner
13.20 Heat Exchanger Lower Insulation Pad (Fig. 66)
WARNING: The PCB Control and Fan
Assembly is 325 Vdc. Isolate at supply before
access.
1. Remove the fan and condensate trap (see section 13.14
and 13.17).
2. Remove the burner (see section 13.18).
3. Remove the four bolts securing the combustion box base.
4. Remove the combustion box base.
5. Pull the central insulation panel down from the centre of
the heat exchanger and remove the lower insulation pad.
6. Fit the new insulation pad and reassemble in reverse
order.
13.21 Heat Exchanger Upper Insulation Pad (Fig. 66)
WARNING: The PCB Control and Fan
Assembly is 325 Vdc. Isolate at supply before
access.
1. Remove the fan and condensate trap (see section 13.14
and 13.17).
2. Remove the burner (see section 13.18).
3. Remove the heat exchanger (see section 13.19).
4. Remove the four bolts securing the combustion box base.
5. Remove the combustion box base.
6. Pull the central insulation panel down from the centre of
the heat exchanger.
7. Fit the new insulation pad and reassemble in reverse
order.
Combustion Box Base
Securing Screws
Burner Securing
Screws
Fig. 66
Upper Insulation
Pad
Lower Insulation
Pad