11.0 Changing Components
32
11.10
Insulation
(Fig. 62)
There are four insulation pieces in the combustion
box - two side pieces, one rear and one front
attached to the combustion box inner panel.
Front Piece
1. Undo the screws securing the combustion box
inner panel. Remove the panel.
2. Disengage the insulation piece from the
retaining tabs on the lower edge of the inner
panel.
3. Fit the new insulation piece by carefully locating
it behind the tabs and pushing back.
Side and Rear Pieces
1. To replace either side piece or the rear piece it
is necessary to remove the heat exchanger as
described in Section 11.9.
2. To remove either side piece undo the
appropriate fan hood to combustion box screw.
Pull the insulation forwards out of the combustion
box, noting it’s orientation.
3. It is necessary to remove both side pieces to
replace the rear piece. Note the orientation of the
rear piece and remove it.
4. When fitting the new rear piece ensure that it
locates behind the burner end blade.
5. Refit the side pieces ensuring that they are not
abraded against the combustion box side panels,
captive nuts etc.
Completion
Carefully clean away any insulation from the
combustion box and burner and reassemble in
reverse order.
11.11
Overheat Thermostat
(Fig. 63)
1. Pull the two electrical connections off the
thermostat.
2. Remove the screws securing the thermostat to
the mounting plate on the flow pipe.
3. Reassemble in reverse order. The thermostat is
not polarised - either wire can fit either terminal on
the thermostat.
Side Insulation Piece
Combustion Box
Inner Panel
Rear Insulation Piece
Side Insulation
Piece
Overheat
Thermostat
Flow Pipe
Inner Panel
Insulation
Fig. 62
Fig. 63
