Lennox Hearth DIRECT-VENT RAVENNA SDVI33/40 - Manual (Page 6)

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For altitudes above 2,000 feet (In Canada 4,500 FT/1370 M), the orifice
should be de­rated by 4% for every 1,000 feet to maintain the proper
ratio of gas to air. Improper orifice sizing may result in damage and
unsafe conditions. Changing the orifice should only be done by a quali­
fied service technician. Contact your Lennox Hearth Products dealer for
proper orifice sizes.
ORIFICE SIZE/ALTITUDE ADJUSTMENT
Fireplace Requirements
These heaters are designed to be installed into an existing masonry
fireplace (built to UBC 37 or ULC S628 standards) or factory built solid
fuel, wood burning fireplace (listed to UL 127 or ULC S610) only. All
exhaust gases must be vented outside the structure. Combustion air
is drawn from outside the structure. When installing in a factory built
fireplace, the fireplace grate must be removed and the damper must be
removed or secured open.
If the factory­built fireplace has no gas access hole(s) provided, an access
hole of 1­1/2 inches (38 mm) or less may be drilled through the lower
sides or bottom of the firebox in a proper workmanship like manner. This
access hole must be plugged with a non­combustible insulation after the
gas supply line has been installed. The installer must mechanically attach
the marking supplied with the gas fireplace insert to the inside of the firebox
of the fireplace into which the gas fireplace insert is installed.
Si le foyer préfabriqué ne comporte pas d’orifices d’amenée du gaz, un
orifice d’au plus 37,5 mm (1,5 po) peut être pratiqué, selon les règles
de l’art, dans la partie inférieure des parois ou au fond de la chambre de
combustion. Cet orifice doit être obturé au moyen d’isolant incombustible
une fois la conduite de gaz en place.
IMPORTANT: When installing these appliances into a factory
built fireplace or heat-form, the air flow within and around the
fireplace shall not be altered by the installation of the insert
(i.e. DO NOT BLOCK louvers or cooling air inlet or outlet ports,
circulating air chambers in a steel fireplace liner or metal heat
circulator).
See Page 9 for instructions on affixing fireplace warning label
shown below.
THE FIREPLACE INSERT
Since there are always several potential sources of fire in any home, we
recommend installing smoke detectors. If possible, install the smoke
detector in a hallway adjacent to the room (to reduce the possibility of
occasional false activation from the heat produced by the appliance). If
your local code requires a smoke detector be installed within the same
room, you must follow the requirements of your local code. Check with
your local building department for requirements in your area.
SMOKE DETECTORS
WARNING
THIS FIREPLACE HAS BEEN ALTERED TO
ACCOMMODATE A FIREPLACE INSERT AND
SHOULD BE INSPECTED BY A QUALIFIED
PERSON PRIOR TO RE-USE AS A
CONVENTIONAL FIREPLACE.
• Must conform with all local, state and national installation codes. In
the absence of local codes, the installation must conform with National
Fuel Gas Code ANSI Z223.1 ­ latest edition, also known as NFPA 54
(In Canada, the current CAN/CSA B149.1 installation code). Refer to
the National Fuel Gas Code and local zoning and code authorities for
details on installation requirements.
• Mobile home installations must conform with the Mobile Home Con­
struction and Safety Standard, Title 24 CFR, Part 3280 (in Canada
CAN/CSA Z240 MH), or, when such a standard is not applicable, the
Standard for Mobile Home Installations, ANSI A225.1 ­ latest edi­
tion.
• Must be vented directly to the outside in accordance with the latest
edition of the National Fuel Gas Code and must never be attached to
a chimney serving a separate solid fuel burning appliance.
• Has been certified for use with either natural gas or propane.
• Is NOT for use with solid fuels.
• Is approved for sitting rooms and/or bedrooms.
• This appliance is suitable for installation into masonry or factory built
fireplaces.