
LT5032 (01:05-08)
C&J DGT 5000 Installation Instructions
SECTION EIGHT Fire lace Requirements
INSTALLATION BASE CUTOUT (To insert outer box into)
The cut out in the horizontal base o the ireplace or the outer box needs to be between
510mm and 525mm side to side and 190mm and 210mm ront to back dimension. It is
recommended that the base o the ireplace is no narrower than 555mm (22”) and no
shallower ront to back than 286mm (11 ¼”). The ront o the burner tray box must not
protrude any urther out than the plane o the ireplace opening when measured rom the
top edge o the opening (not the ront o the hearth).
FIREPLACE OPENING DIMENSIONS
For a decorative burner like the DGT5000, a large hole in the wall or hearth-mounted
opening is sometimes desired. The opening size (area) and ventilation has a direct
in luence on how well the lue will clear the products o combustion, if it is too large then
the fire will require a very large and long flue to clear the roducts successfully and
safely. However the smaller the opening, the better the likelihood o success ul products
clearance. As a general guide, the ireplace ront opening area needs to be between 5 and
10 times the cross sectional area o the lue pipe – depending upon its length and
e ectiveness. A detailed guide is given in CORGI ublication ‘Gas Fires and S ace
Heaters’ section 4 DFE gas a liances. Clearly an acceptable compromise has to be
ound between aesthetics and per ormance, but working with smaller opening area gives a
much better chance o success. I spillage problems are ound, itting an internal canopy to
the ireplace can be one option to reduce the rontal opening area and to improve the
spillage. Ventilation must also be checked to ensure it is adequate or products o
combustion clearance.
Hearth Installation Requirements
A non-combustible hearth must be provided beneath the appliance within the ireplace
opening, a ire-resisting hearth must also be provided symmetrically disposed about the
ireplace opening a minimum thickness o 12 mm with the perimeter 50mm above loor
level. The width must extend a minimum o 150 mm either side o the ireplace opening
and a depth o 300 mm rom the ront o the lamestrip – approximately 200mm rom the
ront o the ire outer body. Purpose-built superimposed ire-resistant hearths and back
panels, speci ied as suitable by the manu acturers may be used.
Hole in the all Installation
Please read these instructions carefully if you intend an Installation
without a hearth.
This appliance must be installed in accordance with all relevant sections of
approved document “J” of the building regulations
It is recommended that a non combustible hearth extends a minimum o 300mm orward o
the lamestrip – approximately 200mm rom the ront o the ire outer body, and a minimum
o 150mm either side, and that a rise exist at the ront edge and sides o the hearth o a
minimum o 50mm.
The ire may be installed so that its base sits on a sur ace o a ire opening at least 55 mm
up rom the loor (this is to ensure that no flame or incandescent material is less than
225mm above the floor, a requirement of approved document “J”).
Consideration should be given to the location o the appliance ensuring it is very visible
and it should be positioned at a height were it can clearly be seen on approach.