8.3 Combustible wall materials.
!
For brick or other non-combustible wall constructions, be sure to remove any
combustible wall cladding material from the area shown in figure 2.
!
For Timber frame buildings, the back surface of the appliance case must be separated
from the timber frame by 25mm of non-combustible material. This can consist of the
usual 12.5mm thick plasterboard plus a 12.5mm thick sheet of non-combustible
insulating material (e.g. fibre cement board). As an option, a pre-cut insulating sheet is
available from your appliance supplier or direct from Baxi Fires Division – Ask for
Baxi Fires Division part no. 0591221. The insulating sheet can be used to seal the
annular gap between the flue unit and the inner leaf sleeve (See section 8.5). Do not
permanently fix the insulating sheet to the wall at this stage (See section 9.2).
8.4 Cutting the flue hole for brick, stone etc. building.
Cut the hole for the flue unit. Make sure that it is straight and level. Though a hammer
and chisel can be used, using a core drill is by far the quickest and simplest method for
normal brickwork.
!
Before cutting the hole in the wall make sure that the height to the top surface of the
finished floor or hearth is known. The height from this surface to the flue hole centre is
shown in figure 2. The terminal position must also comply with the location
requirements given in section 5.16.
!
Place dust sheets on the floor and over any furnishings etc.
Page 19
INSTALLER GUIDE
©
Baxi Heating U.K. Limited 2007.
Figure 9.