Flavel Castelle Installation, Maintenance And User Instructions page 13

2.3.2 Remove the firebox / burner assembly from the packaging. Remove the
fuel-bed set from the combustion chamber and store in a safe location.
Remove the firebox mounting plate from the rear face of the firebox
assembly by unscrewing the 4 off M5 retaining screws as shown below
in figure 6.
Fig. 6
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