Baxi Belmont 2, Installation And Servicing Instructions

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5.0 Installation - Page 14
5.4 Preparation of the Site - Timber Frame Dwelling
9. This installation requires a 150mm diameter piece of
single wall flue pipe or similar for use as a metal sleeve
(Fig. 19).
10. This installation details the use of a fire surround or false
chimney breast, having a minimum depth of 140mm, which
allows the fire to be positioned in front of the wall with a hole
in the inner wall for the flue only. The maximum surround
depth will depend upon the wall thickness. The maximum
total depth is 600mm from the outer wall face to the rear face
of the outer fire frame. The minimum total depth is 300mm.
11. Any combustible material within the installation must be
at least 75mm away from the appliance, the flue box and the
circular horizontal flue.
12. Installation must be in accordance with the current
edition of Institute of Gas Engineers Publication IGE/UP/7
(Gas Installations in Timber Framed Housing).
13. A suitable liner should be made to enclose the fire. This
should be fitted within the false fire surround. It should be
24mm thick and be of Supalux or similar non-combustible
board. If 24mm material is not available two or more smaller
boards may be used. It should extend from the outer fire
frame to the inside face of the wall. When fitted, this box
should be insulated to the top and sides with 100mm of
Rockwool.
14. The back surface of the fire must be separated
from the timber frame by 25mm of non-combustible material.
This can consist of the usual 13mm plasterboard wall lining
plus 12mm of Supalux or similar non-combustible board.
15. Measure 400mm up from hearth level and mark this
dimension on the wall. Drill through the inner and outer walls
at the mark using a suitable pilot drill, centrally in any
surround.