Installation Into An Existing Fireplace
PAGE 12
1. Check that the gather is sealed to the firebox.
2. Check chimney. If chimney is closer than 3 meters to the
apex of roof, the chimney should extend approximately
350mm past the apex. Chimney should be a minimum of 3.6
meters from the top of the gather.
Recommended flue sizes.
3. The cross section area of flue should be within 100% of the
recommended size through its lengths and preferably straight.
The angle of any bend should be more than 45% degrees.
Chimney pots, which are too small to allow free flow, and
mortar droppings at flue bends, are frequent causes of
smoking.
4. Check smoke outlet. With the damper fully open, check for
mortar dropping over the smoke outlet. Such mortar can be
removed with a long cold chisel.
5. Check ‘False’ drafts entering around side of firebox / fascia
/ mantelpiece into cavity. Use fiberglass wool to prevent air
movement.
6. Check air intake is not obstructed.
7. Check damper properly located on pivot-pins.
Rollback
Smokeshelf
N.B. No metal
gather required
Seal
Air intake must not
be obstructed
Fibreglass insulation
Not recessed by
more than 110mm
1a
1b
Existing fireplace
recess and chimney
If recess is too small remove
Rollback and Smokeshelf
as below
If masonry overhangs
the smokeholes there
must be at least a 200mm
clearance above the unit
Gap from lintel
to be bricked or
firebox raised
Insulation
2
Hearth
3
Smoke outlets
B. Fireplace recess too large
(more than 75mm) - use bricks
to build up and reduce size
Fibreglass insulation
(supplied)
Allow 1mm expansion gap
for all materials
Gaps greater than 75mm
to be bricked. If less than 75mm
Jetmaster fascias and trims can
be used to cover the gap
Infill strips of marble/sone/tiles
10mm overlap infront or behind frame
Fireplace surround
(i.e. mantelpiece)
Jetmaster
mantelpieces have
20mm or 100mm
rebate
A. Fireplace recess slightly too large
(less than 75mm) - pack with with
extra fibreglass insulation
Hearth
Troubleshooting
UNIT
500/600/700S
700 DEEP
850
1050
FLUE SIZE
Round
(diam. mm)
200
225
250
300
FLUE SIZE
Square
(mm)
225x225
250x250
250x250
300x300
