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WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result causing property
damage, personal injury, or loss of life.
— Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
WARNING: Improper installation, adjust-
ment, alteration, service, or maintenance
can cause injury or property damage.
Refer to this manual for correct installa-
tion and operational procedures. For
assistance or additional information
consult a qualified installer, service
agency, or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in
which it is installed. Provisions for adequate combustion and ventilation air must be
provided. Refer to
Air for Combustion and Ventilation
section on page 4 of this manual.
CGD3018N CY2718N
CGD3924N CY3124N
CGD3930N
18", 24", and 30"
Variable Manually-Controlled Models
CGD3018NT CGD3924NT
CGD3930NT CGB3924NT
CGB3930NT
18", 24" and 30" Thermostatically-
Controlled Models
MOUNTAIN OAK, PREMIUM AGED SPLIT OAK,
AND SMOKY MOUNTAIN OAK UNVENTED
(VENT-FREE) NATURAL GAS LOG HEATERS
Patent Pending
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohibited
by state or local codes.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
(Smoky Mountain Oak Model Shown)
WARNING: This appliance is for instal-
lation only in a solid-fuel burning ma-
sonry or UL127 factory-built fireplace,
or in an approved ventless firebox. It is
design-certified for these installations
in accordance with ANS Z21.11.2.
Exception: Do not install this appliance
in a factory-built fireplace that includes
instructions stating it has not been
tested or should not be used with
unvented gas logs.
®
VARIABLE MANUALLY-CONTROLLED MODELS ALSO DESIGN-CERTIFIED
AS VENTED DECORATIVE APPLIANCES
OWNER’S OPERATION AND INSTALLATION MANUAL