Desa CLD3018N, CLD3924NT, CCL3930NTA User Manual
®
ROYAL ENGLISH OAK, BILTMORE SPLIT OAK,
AND WINCHESTER OAK UNVENTED
(VENT-FREE) NATURAL GAS LOG HEATER
VARIABLE MANUALLY-CONTROLLED MODELS ALSO DESIGN-CERTIFIED
AS VENTED DECORATIVE APPLIANCES
OWNER’S OPERATION AND INSTALLATION MANUAL
18" and 24" Variable
Manually-Controlled Models
CGS2718N
CGS3124N
CLD3018N
(Winchester Oak Model Shown)
24" and 30" Thermostatically-
Controlled Models
CLD3924NT
CCL3930NT(A)
Patent
Pending
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 supplier,
call the fire department.
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property
damage. Refer to this manual for correct installation and operational procedures. For assistance or additional information consult a qualified installer,
service agency, or the gas supplier.
WARNING: This appliance is for installation only in a solid-fuel burning
masonry 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.
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
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
Air for Combustion and Ventilation
Save this manual for future reference.
section on page 4 of this manual.
CGS2718N, CGS3124N, CLD3018N,
CLD3924NT, and CCL3930NT(A)
UNVENTED NATURAL GAS LOG HEATER
SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate, or service this heater. Improper use of this heater can
cause serious injury or death from
burns, fire, explosion, electrical
shock, and carbon monoxide
poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness,
or nausea. If you have these signs, the heater
may not be working properly. Get fresh air
at once! Have heater serviced. Some people
are more affected by carbon monoxide than
others. These include pregnant women,
people with heart or lung disease or anemia,
those under the influence of alcohol, and
those at high altitudes.
Natural Gas: Natural gas is odorless. An
odor-making agent is added to the gas. The
odor helps you detect a gas leak. However,
the odor added to the gas can fade. Gas may
be present even though no odor exists.
Make certain you read and understand all
Warnings. Keep this manual for reference.
It is your guide to safe and proper operation
of this heater.
WARNING: Any change to
this heater or its controls can be
dangerous.
1. This appliance is only for use with the
type of gas indicated on the rating plate.
This appliance is not convertible for use
with other gases.
2. If you smell gas
• shut off gas supply
• 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 supplier ,
call the fire department
3. This heater shall not be installed in a bedroom or bathroom unless installed as a
vented appliance (Variable ManuallyControlled Models Only) (see Installing
Damper Clamp Accessory for Vented
Operation, page 10).
4. Never install the heater
• in a recreational vehicle
• where curtains, furniture, clothing, or
other flammable objects are less than
42 inches from the front, top, or sides
of the heater
• in high traffic areas
• in windy or drafty areas
5. Before installing in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned of soot, creosote,
ashes and loose paint by a qualified
chimney cleaner. Creosote will ignite
if highly heated. Inspect chimney flue
for damage. If damaged, operate heater
with flue damper closed.
6. If fireplace has glass doors, never operate this heater with glass doors closed.
If you operate heater with doors closed,
heat buildup inside fireplace will cause
glass to burst. Also if fireplace opening has vents at the bottom, you must
open the vents before operating heater.
7. Y ou must operate this heater with a fireplace screen in place. Make sure fireplace screen is closed before running
heater.
8. This log heater is designed to be smokeless. If logs ever appear to smoke, turn
off heater and call a qualified service
person.
slight smoking could occur due to log
curing and heater burning manufacturing residues.
9. T o prevent the creation of soot, follow
the instructions in Cleaning and Main-
tenance, page 19.
Note:
During initial operation,
10. Do not allow fans to blow directly into
the fireplace. Avoid any drafts that alter burner flame patterns. Ceiling fans
can create drafts that alter burner flame
patterns. Altered burner patterns can
cause sooting.
11. Before using furniture polish, wax, carpet cleaner, or similar products, turn
heater off. If heated, the vapors from
these products may create a white powder residue within burner box or on
adjacent walls or furniture.
12. Do not use a blower insert, heat exchanger insert or other accessory not
approved for use with this heater.
13. This heater needs fresh, outside air ventilation to run properly . This heater has
an oxygen depletion sensor (ODS) pilot light safety system. The ODS shuts
down the heater if not enough fresh air
is available. See Air for Combustion
and Ventilation, pages 4 through 6. If
heater keeps shutting off, see Trouble-
shooting, pages 20 through 22.
14. Do not run heater
• where flammable liquids or vapors
are used or stored
• under dusty conditions
15. Do not use this heater to cook food or
burn paper or other objects.
16. Never place any objects on the heater.
17. Heater base assembly becomes very hot
when running heater. Keep children and
adults away from hot surface to avoid
burns or clothing ignition. Heater will
remain hot for a time after shut-down.
Allow surface to cool before touching.
18. Carefully supervise young children
when they are in the room with heater.
19. Do not use heater if any part has been
exposed to or under water. Immediately
call a qualified service technician to inspect the room heater and to replace any
part of the control system and any gas
control which has been under water.
20. Do not operate heater if any log is broken. Do not operate heater if a log is
chipped (dime-sized or larger).
21. T urn heater of f and let cool before servicing. Only a qualified service person
should service and repair heater.
22. Operating heater above elevations of
4,500 feet could cause pilot outage.
2
104385
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
Back Log
Crossover Log
Front Log
Burner
Piezo
Ignitor
Control Knob
Figure 1 - Yellow Flame Vent-Free Gas Log Heater Shown (Logs May Vary by Model)
PRODUCT
FEATURES
OPERATION
This heater is clean burning. It requires no
outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by
realistic, dancing yellow flames. This heater
is designed for vent-free operation with flue
damper closed. It has been tested and approved to ANS Z21.11.2 standard for
unvented heaters. State and local codes in
some areas prohibit the use of vent-free
heaters. Non-thermostat models may also
be operated as a vented decorative (ANS
Z21.60) product by opening flue damper.
SAFETY PILOT
This heater has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
The ODS/pilot is a required feature for ventfree room heaters. The ODS/pilot shuts off
the heater if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
LOCAL CODES
Install and use heater with care. Follow all
local codes. In the absence of local codes, use
the latest edition of The National Fuel Gas
Code ANS Z223.1, also known as NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Note:
Where listed vented decorative logs
are required, thermostat models are not permitted.
UNPACKING
WARNING: Do not remove
the metal Data Plates from the
grate assembly. The Data Plates
contain important product
information.
1. Remove logs and heater base assembly from carton.
heater base assembly by burners. This
could damage heater. Always handle
base assembly by grate.
2. Remove all protective packaging applied to logs and heater for shipment.
3. Check all items for any shipping damage. If damaged, promptly inform
dealer where you bought heater.
Note:
Do not pick up
104385
3
CGS2718N, CGS3124N, CLD3018N,
CLD3924NT, and CCL3930NT(A)
UNVENTED NATURAL GAS LOG HEATER
AIR FOR
COMBUSTION AND
VENTILATION
WARNING: This heater shall
not be installed in a confined space
or unusually tight construction
unless provisions are provided
for adequate combustion and ventilation air. Read the following instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Today’s homes are built more energy efficient than ever. New materials, increased
insulation, and new construction methods
help reduce heat loss in homes. Home owners
weather strip and caulk around windows and
doors to keep the cold air out and the warm air
in. During heating months, home owners
want their homes as airtight as possible.
While it is good to make your home energy
efficient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and
fuel burning appliances draw air from the
house to operate. You must provide adequate fresh air for these appliances. This
will insure proper venting of vented fuelburning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National
Fuel Gas Code. NFPA 54/ANS Z223.1, Section 5.3, Air for Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusually tight construction is defined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a continuous water vapor retarder with
a rating of one perm (6x10
per pa-sec-m2) or less with openings gasketed or sealed
b. weather stripping has been
added on openable windows and
doors
c. caulking or sealants are applied
to areas such as joints around
window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide additional fresh air. See
From Outdoors
If your home does not meet all of the
three criteria above, proceed to
termining Fresh-Air Flow For Heater
Location
and
Ventilation Air
, page 6.
on page 5.
and
-11
kg
De-
Confined Space and Unconfined
Space
The National Fuel Gas Code (ANS Z223.1,
1992 Section 5.3) defines a confined space
as a space whose volume is less than 50
cubic feet per 1,000 Btu per hour (4.8 m3 per
kw) of the aggregate input rating of all
appliances installed in that space and an
unconfined space as a space whose volume
is not less than 50 cubic feet per 1,000 Btu
per hour (4.8 m3 per kw) of the aggregate
input rating of all appliances installed in that
space. Rooms communicating directly with
the space in which the appliances are installed*, through openings not furnished
with doors, are considered a part of the
unconfined space.
This heater shall not be installed in a confined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.
* Adjoining rooms are communicating only
if there are doorless passageways or ventilation grills between them.
4
104385
OWNER’S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this work sheet to determine if you have a confined or unconfined space.
Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between
the rooms.
1. Determine the volume of the space (length x width x height).
Length x Width x Height = _________________cu. ft. (volume of space)
Example:
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of
the space.
2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
_________________ (volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr the space can support)
Example:
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater ________________________ Btu/Hr
Gas water heater* ________________________ Btu/Hr
Gas furnace ________________________ Btu/Hr
Vented gas heater ________________________ Btu/Hr
Gas fireplace logs ________________________ Btu/Hr
Other gas appliances*+ ________________________ Btu/Hr
Total = ________________________ Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
_________________ Btu/Hr (maximum the space can support)
_________________ Btu/Hr (actual amount of Btu/Hr used)
Example:
The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.
B. V ent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)
2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)
Example:
Gas water heater
Vent-free heater +
Total =
51,200 Btu/Hr (maximum the space can support)
71,500 Btu/Hr (actual amount of Btu/Hr used)
40,000
31,500
71,500
Btu/Hr
Btu/Hr
Btu/Hr
WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space
or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of
the methods described in the
104385
National Fuel Gas Code, ANS Z223.1, 1992, Section 5.3
5
or applicable local codes
Continued
.
CGS2718N, CGS3124N, CLD3018N,
CLD3924NT, and CCL3930NT(A)
UNVENTED NATURAL GAS LOG HEATER
AIR FOR
COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside
Building
This fresh air would come from an adjoining unconfined space. When ventilating
to an adjoining unconfined space, you
must provide two permanent openings:
one within 12" of the ceiling and one
within 12" of the floor on the wall connecting the two spaces (see options 1 and
2, Figure 2). You can also remove door
into adjoining room (see option 3, Figure
2). Follow the National Fuel Gas Code
NFPA 54/ANS Z223.1, Section 5.3, Air for
Combustion and Ventilation for required
size of ventilation grills or ducts.
WARNING: Rework worksheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two permanent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
or spaces open to the outdoors. These spaces
include attics and crawl spaces.
IMPORTANT:
inlet or outlet air into attic if attic has a
thermostat-controlled power vent. Heated air
entering the attic will activate the power vent.
Do not provide openings for
Ventilation
Grills
Into Adjoining
Room,
Option 1
Figure 2 - Ventilation Air from Inside Building
Outlet
Air
Inlet
Air
Figure 3 - Ventilation Air from Outdoors
Or
Remove
Door into
Adjoining
Room,
Option
3
12"
Outlet
Air
Inlet Air
Ventilation Grills
Into Adjoining Room,
Ventilated
Attic
Ventilated
Crawl Space
12"
Option 2
To Attic
To
Crawl
Space
6
104385
OWNER’S MANUAL
42"
16"
INSTALLATION
NOTICE: This heater is intended
for use as supplemental heat. Use
this heater along with your primary heating system. Do not install this heater as your primary
heat source. If you have a central
heating system, you may run
system’s circulating blower while
using heater. This will help circulate the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
WARNING: A qualified service person must install heater.
Follow all local codes.
NOTICE: State or local codes may
only allow operation of this appliance in a vented configuration.
Check your state or local codes.
WARNING: Before installing
in a solid fuel burning fireplace,
the chimney flue and firebox must
be cleaned of soot, creosote,
ashes and loose paint by a qualified chimney cleaner. Creosote
will ignite if highly heated. A dirty
chimney flue may create and distribute soot within the house. Inspect chimney flue for damage. If
damaged, operate heater with flue
damper closed.
WARNING: Seal any fresh air
vents or ash clean-out doors located on floor or wall of fireplace.
If not, drafting may cause pilot
outage or sooting. Use a heatresistant sealant. Do not seal
chimney flue damper.
WARNING: Never install the
heater
• in a bedroom or bathroom unless installed as a vented appliance (Variable ManuallyControlled Models Only) (see
page 10)
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 42 inches
from the front, top, or sides of
the heater
• in high traffic areas
• in windy or drafty areas
CAUTION: This heater creates warm air currents. These
currents move heat to wall surfaces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as tobacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls.
IMPORTANT:
ture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilation air may cause mildew to form
from too much moisture. See Air for Com-
bustion and Ventilation, pages 4 through 6.
Vent-free heaters add mois-
CHECK GAS TYPE
Use only natural gas. If your gas supply is
not natural gas, do not install heater. Call
dealer where you bought heater for proper
type heater.
INSTALLATION AND
CLEARANCES
(Vent-Free Operation Only)
WARNING: Maintain the minimum clearances. If you can, provide greater clearances from
floor, ceiling, and adjoining wall.
MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size Side Wall Ceiling
18", 24" 16" 42"
LOG SIZING REQUIREMENTS
Minimum Firebox Size
Log Front Rear
Size Height Depth Width Width*
18" 17" 14" 24" 20"
24" 17" 14" 28" 21"
*Measured at 14" depth.
Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127 listed manufactured fireplace, or listed
vent-free firebox.
Minimum Wall and Ceiling
Clearances (see Figure 4)
A. Clearances from the side of the fire-
place opening to any combustible wall
should not be less than 16 inches.
B. Clearances from the top of the fireplace
opening to the ceiling should not be less
than 42 inches.
104385
Left and
Right
Sides
Figure 4 - Minimum Clearance to Wall and
Ceiling
Continued
7
CGS2718N, CGS3124N, CLD3018N,
CLD3924NT, and CCL3930NT(A)
UNVENTED NATURAL GAS LOG HEATER
INSTALLATION
Continued
NOTICE: You may use non-thermostat heater as a vented product. If so, you must always run
heater with chimney flue damper
open. If running heater with
damper open, noncombustible
material above fireplace opening
is not needed. Go to
Damper Clamp Accessory for
Vented Operation
Minimum Noncombustible
Material Clearances
If Not Using Mantel
Note:
If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the
information below.
You must have noncombustible material(s)
above the fireplace opening. Noncombustible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheet metal, you must have noncombustible
material behind it. Noncombustible material
must extend at least 8" up (for all models). If
noncombustible material is less than 12", you
must install the fireplace hood accessory (24"
model only). See Figure 5 at right for minimum clearances.
IMPORTANT:
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.
If you cannot meet these
Installing
, page 10
If Using Mantel
You must have noncombustible material(s)
above the fireplace opening. Noncombustible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheet metal, you must have noncombustible
material behind it. Noncombustible material must extend at least 8 inches up (for all
models). If noncombustible material is less
than 12", you must install the fireplace hood
accessory (24" model only). Even if noncombustible material is more than 12", you
may need the hood accessory to deflect heat
away from your mantel shelf. See Figure 5
and Figures 6 and 7 on page 9 for minimum
clearances.
Noncombustible Requirements for
Material Distance (A) Safe Installation
12" or more Noncombustible material okay.
Between 8" and 12" 24" Model: Install fireplace hood acessory (GA6050,
GA6052, or GA6053, see
18" Model: Noncombustible material okay.
Less than 8" Noncombustible material must be extended to at
least 8". See
cannot extend material, you must operate heater
with flue damper open.
IMPORTANT:
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.
Between 8" and 12"
If you cannot meet these
Accessories
, page 25).
, above. If you
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
8
104385
OWNER’S MANUAL
Hearth
5"
Min.
Combustible
Material
INSTALLATION
Continued
MANTEL CLEARANCES
In addition to meeting noncombustible material clearances, you must also meet required
clearances between fireplace opening and
mantel shelf. If you do not meet the clearances listed below, you will need a hood.
Determining Minimum Mantel
Clearance
If you meet minimum clearance between
mantel shelf and top of fireplace opening, a
hood is not required (see Figure 6).
Determining Minimum Mantel
Clearances when Using a Hood
If minimum clearances in Figure 6 are not
met, you must have a hood. When using a
hood there are still certain minimum mantel
clearances required. Follow minimum clearances shown in Figure 7 when using a hood.
NOTICE: If your installation does
not meet the minimum clearances
shown, you must do one of the
following:
• operate the logs only with the
flue damper open
• raise the mantel to an acceptable height
• remove the mantel
FLOOR CLEARANCES
A. If installing appliance on the floor level,
you must maintain the minimum distance of 14" to combustibles (see Figure 8).
B. If combustible materials are less than
14" to the fireplace, you must install
appliance at least 5" above the combustible flooring (see Figure 9).
"
Mantel Shelf
18"8"20"
14"
Distances to
Underside of
Mantel
22"
16
Underside of
Mantel Shelf
All minimum
distances are
in inches
Log Set
24"
24" Model
3
20"
/4
"
18" Model
Top of Fireplace
Opening
Minimum NonCombustible
Material
10"
8"
6"
1
2
/2
(A)
12"
8"
Minimum NonCombustible
Material Height
Figure 6 - Minimum Mantel Clearances Without Using Hood
8"
Min.
Mantel Shelf
12" 15" 18"
Distances to
Underside of
Mantel
Underside of
Mantel Shelf
All minimum
distances are
in inches
20"
Top of Fireplace
Opening
Minimum NonCombustible
Material
12"
10"
8"
6"
1
"
/2
2
Hood
(GA6050, GA6052)
(GA6050, GA6052,
or GA6053)
Figure 7 - Minimum Mantel Clearances When Using Hood
Log Set
18" and 24"
Models
104385
Combustible
14"
Min.
Noncombustible Material
Material
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
9
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Continued
CGS2718N, CGS3124N, CLD3018N,
CLD3924NT, and CCL3930NT(A)
UNVENTED NATURAL GAS LOG HEATER
INSTALLATION
Continued
INSTALLING DAMPER
CLAMP ACCESSORY FOR
VENTED OPERATION
Note:
When used as a vented heater, appliance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of noncombustible material.
If your heater is a manually controlled model,
you may use this heater as a vented product.
There are three reasons for operating your
heater in the vented mode.
1. The fireplace does not meet the clear-
ance to combustibles requirements for
vent-free operation.
2. State or local codes do not permit vent-
free operation.
3. You prefer vented operation.
If reasons number 1 or 2 above apply to you,
you must permanently open chimney flue
damper. You must install the damper clamp
accessory (to order, see Accessories, page
25). This will insure vented operation (see
Figure 10). The damper clamp will keep
damper open. Installation instructions are
included with clamp accessory.
See chart below for minimum permanent
flue opening you must provide. Attach
damper clamp so the minimum permanent
flue opening will be maintained at all times.
Chimney Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
Area of Various Standard
Round Flues
Diameter (ins.) Area (sq. ins.)
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
Damper
Clamp
Damper
Manufactured FireplaceMasonry Fireplace
Figure 10 - Attaching Damper Clamp
INSTALLING HEATER BASE
ASSEMBLY
WARNING: You must secure
this heater to fireplace floor. If
not, heater will move when you
adjust controls. Moving heater
may cause a gas leak.
WARNING: If installing in a
sunken fireplace, special care is
needed. You must raise the fireplace floor to allow access to
heater control panel. This will insure adequate air flow and guard
against sooting. Raise fireplace
floor with noncombustible material. Make sure material is secure.
CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle base assembly by grates.
CAUTION: Do not remove the
metal Data Plates attached to the
heater base assembly. The Data
Plates contain important warranty
information.
IMPORTANT:
are level. If heater is not level, heater will not
work properly. For thermostat models, avoid
damage to thermostat bulb. Avoid nicks or
sharp bends in thermostat bulb wire. Keep
thermostat bulb in mounting bracket.
Make sure the heater burners
Damper
Clamp
Damper
Damper
Installation Items Needed
• hardware package (provided with heater)
• approved flexible gas hose (not provided)
(if allowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" drill bit
1. Apply pipe joint sealant lightly to male
threads of the fitting to be threaded into
gas regulator. Connect approved flexible gas hose to gas regulator of heater
(see Figure 11, page 12).
IMPORTANT:
wrench when connecting flexible gas
hose.
2. Locate masonary screws in hardware
package.
3. Position heater base assembly in fireplace.
4. Mark screw locations through holes in
mounting brackets (see Figure 12, page
12). If installing in a brick-bottom fireplace, mark screw locations in mortar
joint of bricks.
5. Remove heater base from fireplace.
Hold gas regulator with
10
104385
OWNER’S MANUAL
INSTALLATION
Continued
6. Drill holes at marked locations using
3/16" drill bit.
7. Attach base assembly to fireplace floor
using two masonry screws (in hardware
package) (see Figure 12).
8. Connect to gas supply. See Connect-
ing To Gas Supply.
Fitting
Heater Gas
Regulator
Flexible Gas Hose
(if allowed by local
codes)
Figure 11 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Masonry
Screw
Mounting
Bracket
Figure 12 - Attaching Base Assembly to
Fireplace Floor
CONNECTING TO GAS
SUPPLY
WARNING: A qualified service person must connect heater
to gas supply. Follow all local
codes.
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 25.
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as well-head gas.
CAUTION: Use only new,
black iron or steel pipe. Internally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of 1/2"
diameter or greater to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
Installation must include a manual shutoff
valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
heater (see Figure 13).
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe
could result in clogged heater valves.
CAUTION: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Install sediment trap in supply line as shown
in Figure 13. Locate sediment trap where it
is within reach for cleaning. Locate sediment trap where trapped matter is not likely
to freeze. A sediment trap traps moisture
and contaminants. This keeps them from
going into heater controls. If sediment trap
is not installed or is installed wrong, heater
may not run properly.
CAUTION: Avoid damage to
regulator. Hold gas regulator with
wrench when connecting it to gas
piping and/or fittings.
A.G.A. Design-Certified Manual
Shutoff Valve With 1/8" NPT Tap*
From Gas
Meter (5"
W.C.** to
10.5" W.C.
Pressure)
Tee Joint Cap Pipe Nipple
Sediment Trap
Approved Flexible
Gas Hose (if
allowed by local
codes)
3" Minimum
Gas
Regulator
104385
Figure 13 - Gas Connection
* Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer.
See Accessories, page 25.
** Minimum inlet pressure for purpose of
input adjustment.
Continued
11
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