
FIREBOX INSTALLATION
1. Locate and position firebox, fit and seal gather in cavity using fire cement (exhaust cement) and
bolts (supplied), to the firebox.
2. Note: Pop rivet back of gather to firebox if required (refer to Cross Section). Earthquake
restraints may be positioned by drilling through firebox into the floor protector, in a position
midway beneath the log-pan. Two 6mm dynabolts or similar will suffice. Do not over tighten and
deform firebox.
2. Attach rock wool (supplied) to the sides of the firebox and gather (using fire cement).
3. DO NOT BLOCK OFF the air entry between the inner flue pipe and flue pipe casing or the air
circulation between the vent holes in the cavity.
3. Refer to Table 5, for minimum hearth sizes.
A minimum 75mm thick Floor protector is only required if finished surface is combustible e.g:timber.
Please note that these dimensions (based on Masonry margins) are the absolute minimum sizes -
widths (A & B) maybe increased if desired. If you intend on recessing the firebox, please add the
recess value to Dimension ‘B’.
WARNING: Minimum cavity sizes leave NO MARGIN FOR ERROR . If the cavity is larger than
minimum dimensions (A & B) close up the lateral sides using Hebel block, concrete block
or similar (do not use any combustible material).
Refer to Table 3 for the minimum cavity dimensions and temporary lintel height measurements,
until the firebox and flue system is installed. Note: Temporary lintel height is measured from
finished floor protector level.
Ensure suitable air vents (min. 2 x 160mm diameter or equivalent) in place to vent firebox space -
these maybe located in the rear or in the side wall space; make allowance (min. 2 x 160mm
diameter or equivalent) at the top of the chimney chase, Pg. 13. Ensure vents are bird and vermin
proofed.
CAVITY PREPARATION
Allow 5mm gap between plaster and flange to
ensure stainless steel cover can be fitted to the
box.
DO NOT PLASTER OVER THE FLANGE.
Jetmaster
Flange
10