11
The outer box should be installed temporarily
into the new opening to check for fit and
alignment. Once this has been established, use
the hole at the back of this box to mark the
posion of the flue. Take care to mark this
accurately to ensure opmal performance
from the appliance.
The back of the outer box should not touch the
outside wall, a clearance of at least 5mm
should be allowed between the two, ensuring
there are no non-combusble materials in this
vicinity.
Align the outer box so that the front
protruding lip of the outer box is flush with the
exisng plastered wall. The non combusble
board which will be installed aer the box is
secured should sit into this reveal.
If the appliance is to be installed
with marble or limestone slips
around the opening then the
ceramic
infill
secons
surrounding
the
outer-box
opening need to be removed.
See
the
diagram
opposite
showing how to remove these 10
strips.
I
INSTALLING THE OUTER BOX INTO A MASONRY CAVITY WALL
I
INSTALLING THE OUTER BOX INTO THE CAVITY WALL WITH SLIPS
The front lip of the outer-box
should then be installed so
that it is aligned with the
front edge of the limestone
slips as shown in this diagram.
