200646_01
5
From an opening in a building directly opposite.
2000mm
Not shown on
diagram
The products of combustion should not discharge across a boundary.
3.
FITTING THE FIREBOX
1
Measure the height of the hearth and make a mark on the wall at the same height.
2
Above the hearth level line, draw a rectangle 405mm (16") wide and 585mm (23") high.
Mark a horizontal line 483mm above hearth level and a vertical line on the centreline of the
fireplace (See figure 2). At this point drill a pilot hole through the cavity wall to the outside.
Cut away the plaster and the inner leaf of the brickwork to expose the outer leaf of the
cavity.
3
Screed the floor of the recess to the level of the hearth to allow accurate fitting of the
firebox.
4
Cut a hole through the cavity wall to accept the flue duct. The centre line for the duct is
483mm (19") above HEARTH level and the hole should measure 125mm x 125mm (See
Figure 2)
5
At this stage it is recommended that the fitting of the fireplace be completed before
proceeding with the installation of the fire but the gas supply must be routed to the
appliance before the fireplace is permanently fixed. The three-core mains cable must be
kept accessible.
6
With the flue spigot fitted, place the firebox into the recess. Mark a line on the flue duct
flush with the position of the outside wall. Depending on whether the fan is to be recessed,
semi-recessed or surface mounted, cut the duct to length as shown on Figure 3.
FIGURE 2
FIGURE 3