Desa CGD3018PT/NT Quick start guide

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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 supplier, call the fire
department.
— Installation and service must be performed by a quali-
fied installer, service agency, or the gas supplier.
UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Patent Pending (Smoky Mountain Oak Model Shown)
Biltmore Split Oak, Seasonal Oak and Smoky Moutain Oak Logs
Variable Manually-Controlled Models Also
Design-Certified As Vented Decorative Appliances
18", 24", AND 30" VARIABLE
MANUALLY-CONTROLLED
MODELS
CRL2718P/N
CRL3124P/N
CCL3018PA/NA
CCL3924PA/NA
18", 24", AND 30"
THERMOSTATICALLY-
CONTROLLED MODELS
CGD3924PT/NT
CGD3018PT/NT,
CCL3018PTA/NTA,
CCL3924PTA/NTA
CCL3930PTB/NTB

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2
WARNING: Improper installation, adjustment, altera-
tion, service, or maintenance can cause injury or prop-
erty damage. Refer to this manual for correct installation
and operational procedures. For assistance or addi-
tional 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 fire-
place, or in a listed ventless firebox enclosure. It is
design-certified for these installations in accordance
with ANSI Z21.11.2. Exception: Do not install this appli-
ance in a factory-built fireplace that includes instruc-
tions 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 Air for Combustion and
Ventilation section on page 5 of this manual.
This appliance may be installed in an aftermarket,*
permanently located, manufactured (mobile) home,
where not prohibited by local codes.
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.
* Aftermarket: Completion of sale, not for purpose of resale, from the
manufacturer
TABLE OF CONTENTS
Safety Information ............................................... 3
Product Identification .......................................... 4
Local Codes ........................................................ 5
Unpacking ........................................................... 5
Product Features ................................................ 5
Air for Combustion and Ventilation ...................... 5
Installation ........................................................... 8
Operating Heater .............................................. 20
Inspecting Burners ............................................ 24
Cleaning and Maintenance ............................... 24
Service Hints ..................................................... 25
Technical Service .............................................. 25
Troubleshooting ................................................. 26
Optional Positioning of Thermostat Sensing Bulb .. 29
Replacement Parts ........................................... 30
Specifications .................................................... 31
Illustrated Parts Breakdown and Parts List ....... 33
Parts Central ..................................................... 42
Accessories ....................................................... 43
Warranty Information .......................... Back Cover

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111160-01C 3
SAFETY INFORMATION
WARNING: This product con-
tainsand/or generates chemicals
known to the state of California
to cause cancer or birth defects,
or other reproductive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, oper-
ate, or service this heater. Im-
proper use of this heater can
cause serious injury or death
from burns, fire, explosion, elec-
trical shock, and carbon mon-
oxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of car-
bon 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 and Propane/LP Gas: Natural and propane/
LP gases are 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 warn-
ings. 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.
WARNING: 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.
WARNING: Do not use a
blower insert, heat exchanger
insert, or other accessory not
approved for use with this heater.
Due to high temperatures, the
appliance should be located out
of traffic and away from furni-
ture and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
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 be-
fore touching.
Carefully supervise young chil-
dren when they are in the room
with heater.
You must operate this heater
with a fireplace screen in place.
Make sure fireplace screen is
closed before running heater.
Keep the appliance area clear
and free from combustible ma-
terials, gasoline, and other flam-
mable vapors and liquids.
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. Do not place propane/LP supply tank(s) in-
side any structure. Locate propane/LP supply
tank(s) outdoors (propane/LP units only).
3. To prevent performance problems, do not use
propane/LP fuel tank of less than 100 lbs. ca-
pacity (propane/LP units only).

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4
4. 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
5. This heater shall not be installed in a bedroom
or bathroom unless installed as a vented ap-
pliance (Variable Manually-Controlled Mod-
els Only) (see Installing Damper Clamp Ac-
cessory for Vented Operation, page 11).
6. 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 quali-
fied chimney cleaner. Creosote will ignite if
highly heated. A dirty chimney flue may cre-
ate and distribute soot within the house. In-
spect chimney flue for damage. If damaged,
repair flue and firebox before operating heater.
7. Do not burn solid-fuel in a masonry or UL127
factory-built fireplace in which a vent-free
room heater is installed.
8. If fireplace has glass doors, never operate this
heater with glass doors closed. If you operate
heater with doors closed, heat buildup inside fire-
place will cause glass to burst. Make sure there
are no obstructions across openings of fireplace.
9. This log heater is designed to be smokeless. If
logs ever appear to smoke, turn off heater and call
a qualified service person. Note: During initial
operation, slight smoking could occur due to log
curing and heater burning manufacturing residues.
10. To prevent the creation of soot, follow the in-
structions in Cleaning and Maintenance, pages
24 and 25.
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. This heater needs fresh, outside air ventila-
tion to run properly. This heater has an Oxy-
gen Depletion Sensing (ODS) safety shutoff
system. The ODS shuts down the heater if not
enough fresh air is available. See Air for Com-
bustion and Ventilation, pages 5 through 7. If
heater keeps shutting off, see Troubleshoot-
ing, pages 26 through 28.
13. Do not run heater
• where flammable liquids or vapors are used
or stored
• under dusty conditions
SAFETY INFORMATION
Continued
14. Do not use this heater to cook food or burn
paper or other objects.
15. 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.
16. Do not operate heater if any log is broken. Do
not operate heater if a log is chipped (dime-
sized or larger).
17. Turn heater off and let cool before servicing.
Only a qualified service person should ser-
vice and repair heater.
18. Operating heater above elevations of 4,500
feet could cause pilot outage.
19. Provide adequate clearances around air
openings.
PRODUCT
IDENTIFICATION
Figure 1 - Vent-Free Gas Log Heater -
Dual Burner (Logs May Vary by Model -
Smoky Mountain Oak Model Shown)
Figure 2 - Vent-Free Gas Log Heater -
Single Burner (Logs May Vary by Model -
Seasonal Oak Model Shown)
Middle Log
Front
Log
Control
Knob
Back Log
Base
Grate
Burner
Piezo
Ignitor
Crossover Log
Front Log
Control Knob
Back Log
Burner
Piezo
Ignitor
Crossover Log

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111160-01C 5
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, ANSI
Z223.1/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 re-
quired, thermostat operation is not permitted.
UNPACKING
CAUTION: Do not remove the
data plates from the grate as-
sembly. The data plates contain
important product information.
1. Remove logs and heater base assembly from
carton. Note: Do not pick up heater base as-
sembly 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.
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 ANSI Z21.11.2 standard
for unvented heaters. State and local codes in some
areas prohibit the use of vent-free heaters. This
heater may also be operated as a vented decora-
tive (ANSI Z21.60) product by opening the flue
damper (non-thermostat operation only).
SAFETY PILOT
This heater has a pilot with an Oxygen Depletion
Sensing (ODS) safety shutoff system. The ODS/
pilot is a required feature for vent-free room heat-
ers. 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 re-
quires no matches, batteries, or other sources to
light heater.
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a confined
space or unusually tight con-
struction unless provisions are
provided for adequate combus-
tion and ventilation air. Read
the following instructions to in-
sure proper fresh air for this
and other fuel-burning appli-
ances 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 effi-
cient, 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 fuel-burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air
for Combustion and Ventilation.
All spaces in homes fall into one of the three fol-
lowing ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 5 through 7 will help
you classify your space and provide adequate
ventilation.

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6
Unusually Tight Construction
The air that leaks around doors and windows may
provide enough fresh air for combustion and ven-
tilation. 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 out-
side atmosphere have a continuous
water vapor retarder with a rating of
one perm (6x10-11 kg per pa-sec-m2) or
less with openings gasketed or sealed
and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to ar-
eas such as joints around window and
door frames, between sole plates and
floors, between wall-ceiling joints, be-
tween 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 Ventilation Air From Outdoors ,
page 7 .
If your home does not meet all of the three
criteria above, proceed to Determining
Fresh-Air Flow for Heater Location .
Confined and Unconfined Space
National Fuel Gas Code, ANSI Z223.1/NFPA 54
defines a confined space as a space whose vol-
ume is less than 50 cubic feet per 1,000 Btu per
hour (4.8 m3per kw) of the aggregate input rating
of all appliances installed in that space and an un-
confined space as a space whose volume is not
less than 50 cubic feet per 1,000 Btu per hour (4.8
m3per kw) of the aggregate input rating of all ap-
pliances installed in that space. Rooms communi-
cating directly with the space in which the appli-
ances are installed*, through openings not fur-
nished with doors, are considered a part of the un-
confined space.
*Adjoining rooms are communicating only if there
are doorless passageways or ventilation grills be-
tween them.
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
fireplace plus any adjoining rooms with doorless pas-
sageways 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: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2,560 cu. ft. (vol-
ume of space)
If additional ventilation to adjoining room is sup-
plied with grills or openings, add the volume of
these rooms to the total volume of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
__________ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 2,560 cu. ft. (volume of space) x 20 =
51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in
the space.
Vent-free fireplace _________ 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. Di-
rect-vent draws combustion air from the outdoors
and vents to the outdoors.
Example:
Gas water heater _____________ Btu/Hr
Vent-free fireplace _____________ Btu/Hr
Total _____________ Btu/Hr
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: 51,200 Btu/Hr (maximum the space
can support)
79,000 Btu/Hr (actual amount of
Btu/Hr used)
40,000
+ 39,000
= 39,000

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111160-01C 7
The space in the 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 ad-
ditional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoin-
ing room. If the extra space provides an uncon-
fined space, remove door to adjoining room or add
ventilation grills between rooms. See Ventilation
Air From Inside Building.
B. Vent room directly to the outdoors. See Ventila-
tion Air From Outdoors.
C. Install a lower Btu/Hr fireplace, 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 un-
confined space. You will need no additional fresh
air ventilation.
WARNING: If the area in
which the heater may be oper-
ated 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 National Fuel Gas Code,
ANSI Z223.1/NFPA 54 Section
5.3 or applicable local codes .
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining un-
confined space. When ventilating to an adjoining
unconfined space, you must provide two perma-
nent 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 3).
You can also remove door into adjoining room (see
option 3, Figure 3). Follow the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for
Combustion and Ventilation for required size of
ventilation grills or ducts.
AIR FOR COMBUSTION
AND VENTILATION
Continued
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills
or ducts. You must provide two permanent open-
ings: 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. Follow the
National Fuel Gas Code, ANSI Z223.1/NFPA 54,
Section 5.3, Air for Combustion and Ventilation
for required size of ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet
or outlet air into attic if attic has a thermostat-con-
trolled power vent. Heated air entering the attic
will activate the power vent.
Figure 4 - Ventilation Air from Outdoors
Figure 3 - Ventilation Air from Inside
Building
Outlet
Air
Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
Into Adjoining
Room,
Option 1
12"
12"

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8
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 pri-
mary heat source. If you have a
central heating system, you may
run system’s circulating blower
while using log heater. This will
help circulate the heat from your
log heater throughout the house.
In the event of a power outage,
you can use this heater as your
primary heat source.
WARNING: A qualified ser-
vice person must install heater.
Follow all local codes.
NOTICE:Stateorlocalcodesmay
only allow operation of this appli-
ance in a vented configuration.
Check your state or local codes.
WARNING: Before installing
in a solid fuel burning fireplace,
thechimneyflueand firebox must
be cleaned of soot, creosote,
ashes, and loose paint by a quali-
fied chimney cleaner. Creosote
will ignite if highly heated. A dirty
chimney flue may create and dis-
tribute soot within house. Inspect
chimney flue and firebox for dam-
age. If damaged, repair flue and
firebox before operating heater.
WARNING: Seal any fresh
air vents or ash clean-out doors
located on floor or wall of fire-
place. If not, drafting may cause
pilot outage or sooting. Use a
heat-resistant sealant. Do not
seal chimney flue damper.
WARNING: Never install the
heater
• in a bedroom or bathroom un-
less installed as a vented ap-
pliance (Variable Manually-
Controlled Models Only) (see
page 12)
• 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 cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as, but
not limited to, tobacco smoke,
aromatic candles, cleaning flu-
ids, oil or kerosene lamps, etc.)
in the air exist, may discolor
walls or cause odors.
IMPORTANT: Vent-free heaters add moisture 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 Combustion and Ventilation, pages 5 through 7.
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP)
for your unit. If your gas supply is not correct, do
not install heater. Call dealer where you bought
heater for proper type heater.
WARNING: This appliance
is equipped for (natural or pro-
pane/LP) gas. Field conversion
is not permitted.

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111160-01C 9
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", 30" 16" 42"
LOG SIZING REQUIREMENTS
Minimum Firebox
Log Front Rear *
Size Height Depth Width Width
18" 17" 14" 24" 20"
24" 17" 14" 28" 21"
30" 17" 14" 34" 24"
* Measured at 14" depth.
Carefully follow the instructions below. This will
ensure safe installation into a masonry, UL127-
listed manufactured fireplace, or certified vent-free
firebox.
Minimum Clearances For Side
Combustible Material, Side Wall, and
Ceiling
A. Clearances from the side of the fireplace cabi-
net to any combustible material and wall
should follow diagram in Figure 5.
Example: The face of a mantel, bookshelf,
etc. is made of combustible material and pro-
trudes 3 1/2" from the wall. This combustible
material must be 4" from the side of the fire-
place opening (see Figure 5).
Note: When installing your gas logs into a
manufactured firebox, follow firebox
manufacturer’s instructions for minimum
clearances to combustible materials.
B. Clearances from the top of the fireplace opening
to the ceiling should not be less than 42 inches.
INSTALLATION
Continued
NOTICE: Manual control heaters
may be used as a vented prod-
uct. If so, you must always run
heater with chimney flue damper
open. If running heater with
damper open, noncombustible
material above fireplace open-
ing is not needed. Go to Install-
ing Damper Clamp Accessory for
Vented Operation, page 11.
Minimum Noncombustible Material
Clearances
If Not Using Mantel
Note: If using a mantel, proceed to If Using Mantel,
page 10. If not using a mantel, follow the informa-
tion 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 non-
combustible 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" and
30" models only). See Figure 6, page 10 for mini-
mum clearances.
IMPORTANT: If you cannot meet these minimum
clearances, you must operate heater with chim-
ney flue damper open. Go to Installing Damper
Clamp Accessory for Vented Operation, page 11.
Figure 5 - Minimum Clearance for
Combustible to Wall
*Minimum 16 inches from Side Wall
Example
*

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10
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 in Figure 7 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 7).
Determining Minimum Mantel Clearance
When Using a Hood
If minimum clearances in Figure 7 are not met,
you must have a hood. When using a hood there
are still certain minimum mantel clearances re-
quired. Follow minimum clearances shown in Fig-
ure 8, page 11 when using hood.
NOTICE: Surface temperatures
of adjacent walls and mantels
become hot during operation.
Walls and mantels above the fire-
boxmaybecomehottothetouch.
If installed properly, these tem-
peratures meet the requirement
of the national product standard.
Follow all minimum clearances
shown in this manual.
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 non-
combustible 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" and
30" models only). Even if noncombustible mate-
rial is more than 12", you may need the hood ac-
cessory to deflect heat away from your mantel shelf.
See Figure 6 and 7, and Figure 8 on page 11 for
minimum clearances.
INSTALLATION
Continued
Heat Resistant
Material
(A)
Figure 6 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
IMPORTANT: If you cannot meet these minimum
clearances, you must operate heater with chim-
ney flue damper open. Go to Installing Damper
Clamp Accessory for Vented Operation, page 11.
Figure 7 - Minimum Mantel Clearances
Without Using Hood
Noncombustible Requirements for
Material Safe Installation
Distance (A)
12" or more Noncombustible material
okay.
Between 8" 24", 30" or 36" Models:
and 12" Install fireplace hood
accessory (GA6050,
GA6052, or GA6053 see
Accessories, page 43).
18" Model: Noncombus-
tible material okay.
Less than 8" Noncombustible material
must be extended to at
least 8". See Between 8"
and 12", above. If you
cannot extend material,
you must operate heater
with flue damper open.
Minimum
Noncombustible
Material
Minimum
Noncombustible
Material Height
Distances to
Underside of
Mantel
Top of Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
12"
8"
(A)
18"
8"
20"
14"
22"
17"
24"
20"
All minimum
distances
are in inches
Log Set
24"/30"
Models
18" Model
2 1/2"
6"
8"
10"

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111160-01C 11
Minimum
Noncombustible
Material 8"
Min.
12" 15" 18"
All minimum
distances are
in inches
Log Set
18", 24",
30" Mod
e
20"
2
1/2
"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052)
Top of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
INSTALLATION
Continued
Figure 8 - Minimum Mantel Clearances
When Using Hood
(GA6050,
GA6052, and
GA6053)
All
Models
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
of the following:
• operate the logs only with the
flue damper open
• raise the mantel to an accept-
able height
• remove the mantel
14"
Min.
Combustible
Material
Noncombustible
Material
Hearth
5"
Min.
Combustible
Material
Figure 10 - Minimum Fireplace
Clearances Above Combustible Flooring
Figure 9 - Minimum Fireplace Clearances
if Installed at Floor Level
FLOOR CLEARANCES
A. If installing appliance on the floor level, you
must maintain the minimum distance of 14"
to combustibles (see Figure 9).
B. If combustible materials are less than 14" to the
fireplace, you must install appliance at least 5"
above the combustible flooring (see Figure 10).
INSTALLING DAMPER CLAMP
ACCESSORY FOR VENTED
OPERATION
Note: When used as a vented heater, appliance
must be installed only in a solid-fuel burning fire-
place with a working flue and constructed of non-
combustible 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 clearance to com-
bustibles 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 or-
der, see Accessories, page 43). This will insure
vented operation (see Figure 11). The damper
clamp will keep damper open. Installation instruc-
tions are included with clamp accessory.
Figure 11 - Attaching Damper Clamp
Manufactured
Fireplace
Masonry
Fireplace
Damper
Damper
Clamp
Damper
Damper
Clamp
Damper

www.desatech.com 111160-01C
12
INSTALLATION
Continued
INSTALLING HEATER BASE
ASSEMBLY
CAUTION: Do not remove
the data plates attached to the
heater base assembly. The data
plates contain important war-
ranty and safety information.
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 fire-
place floor to allow access to
heater control panel. This will in-
sure adequate air flow and guard
against sooting and controls be-
ingdamaged.Raise fireplacefloor
with noncombustible material.
Make sure material is secure.
Figure 12 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Heater Gas
Regulator
Flexible Gas Hose
(if allowed by local codes)
Fitting
CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle base assem-
bly by grates.
IMPORTANT: Make sure the heater burners 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 until ready to mount base to
floor. See Optional Positioning Of Thermostat
Sensing Bulb, pages 29 and 30.
Installation Items Needed
• hardware package (provided with heater)
• approved flexible gas hose (not provided) (if
allowed by local codes)
• sealant resistant to propane (propane/LP) gas,
not provided
• electric drill with 3/16" drill bit
• flathead screwdriver
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 12).
IMPORTANT: Hold gas regulator with
wrench when connecting flexible gas hose.
2. Locate masonry screws in hardware package.
3. Position heater base assembly in fireplace.
4. Place logs in their proper position on heater base,
see Installing Logs on pages 16 through 19.
5. Center heater base and logs front-to-back and
side-to-side in fireplace.
6. Carefully remove logs without moving heater
base.
Area of Various Standard
Round Flues
Diameter (in.) Area (sq. in.)
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
Chimney Minimum Permanent
Height (ft.) Flue Opening (sq. in.)
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
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.

www.desatech.com
111160-01C 13
INSTALLATION
Continued
Figure 13 - Attaching Base Assembly to
Fireplace Floor - Dual Burner Model
Masonry
Screw
Mounting
Bracket
Masonry
Screw
Figure 14 - Attaching Base Assembly to
Fireplace Floor - Single Burner Model
Mounting
Bracket
7. Mark screw locations through holes in mount-
ing brackets (see Figure 13 and 14). If install-
ing in a brick-bottom fireplace, mark screw
locations in mortar joint of bricks.
8. Remove heater base from fireplace.
9. Drill holes at marked locations using 3/16"
drill bit.
10. Attach base assembly to fireplace floor using
two masonry screws (in hardware package)
(see Figure 13 or 14).
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 1/2" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualified ser-
vice person must connect
heater to gas supply. Follow all
local codes.
CAUTION: Never connect
heater directly to the propane/
LP supply. This heater requires
an external regulator (not sup-
plied). Install the external regu-
lator between the heater and
propane/LP supply.
WARNING: Never connect
natural gas fireplace to private
(non-utility) gas wells. This gas
is commonly known as well-
head gas.
Installation Items Needed
Before installing heater, make sure you have the
items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certified equipment shutoff valve from your
dealer. See Accessories, page 43.

www.desatech.com 111160-01C
14
INSTALLATION
Continued
For propane/LP units, the installer must supply an
external regulator. The external regulator will re-
duce incoming gas pressure. You must reduce in-
coming gas pressure to between 11 and 14 inches
of water. If you do not reduce incoming gas pres-
sure, heater regulator damage could occur. Install
external regulator with the vent pointing down as
shown in Figure 15. Pointing the vent down pro-
tects it from freezing rain or sleet.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-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
volume will occur.
Installation must include an equipment 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 16).
IMPORTANT: Install equipment valve in an acces-
sible location. The equipment shutoff valve is for
turning on or shutting off the gas to the appliance.
Check your building codes for any special re-
quirements for locating equipment shutoff valve
to fireplaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from go-
ing into pipe. Excess sealant in pipe could result
in clogged heater valves.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Figure 16 - Gas Connection
* Purchase the optional CSA design-certified equip-
ment shutoff valve from your dealer. See Accesso-
ries, page 43.
** Minimum inlet pressure for purpose of input
adjustment.
3" Minimum
Sediment Trap
Gas
Regulator
CSA Design-
Certified Equipment
Shutoff Valve With
1/8" NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
Tee Pipe Cap
Joint Nipple
Figure 15 - External Regulator With Vent
Pointing Down
Propane/LP
Supply Tank External
Regulator
Vent
Pointing
Down
PROPANE/LP
From External
Regulator (11" W.C.**
to 14" W.C. Pressure)
NATURAL
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
CHECKING GAS CONNECTIONS
WARNING: Test all gas pip-
ing and connections, internal
and external to unit, for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING: Never use anopen
flame to check for a leak. Apply a
noncorrosive leak detection fluid
toall joints.Bubbles formingshow
a leak. Correct all leaks at once.
We recommend that you install a sediment trap in
supply line as shown in Figure 16. Locate sediment
trap where it is within reach for cleaning. Install in
piping system between fuel supply and heater. Lo-
cate sediment trap where trapped matter is not likely
to freeze. A sediment trap traps moisture and con-
taminants. This keeps them from going into heater
controls. If sediment trap is not installed or is in-
stalled 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.

www.desatech.com
111160-01C 15
INSTALLATION
Continued
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
heater.Seeguidelines under Con-
necting to Gas Supply , page 14.
Pressure Testing Gas Supply Piping
System
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment
shutoff valve from gas supply piping system.
Pressures in excess of 1/2 psig will damage
heater regulator.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
3. Pressurize supply piping by either opening
propane/LP supply tank valve for propane/LP
gas or opening main gas valve located on or
near gas meter for natural gas, or using com-
pressed air.
4. Check all joints of gas supply piping system.
Apply a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected fit-
tings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG
(3.5 kPa)
1. Close equipment shutoff valve (see Figure 17).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas or opening main gas valve lo-
cated on or near gas meter for natural gas, or
using compressed air.
3. Check all joints from gas meter to equipment
shutoff valve for natural gas or propane/LPsup-
ply to equipment shutoff valve for propane/LP
(see Figures 18 and 19). Apply noncorrosive
leak detection fluid to all joints. Bubbles form-
ing show a leak.
4. Correct all leaks at once.
Pressure Testing Heater Gas Connections
1. Open equipment shutoff valve (see Figure 17).
2. Open main gas valve located on or near gas
meter for natural gas or open propane/LP sup-
ply tank valve.
ON
POSITION
OFF
POSITION
Figure 17 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff
Valve
Figure 18 - Checking Gas Joints
(Propane/LP Gas Models)
Equipment
Shutoff Valve
Propane/LP
Supply Tank
Thermostat Gas Valve or
Control Valve Location
Figure 19 - Checking Gas Joints (Natural
Gas Models)
Gas Meter
Equipment
Shutoff Valve
Thermostat Gas Valve or
Control Valve Location
3. Make sure control knob of heater is in the
OFF position.
4. Check all joints from equipment shutoff valve
to thermostat gas valve (Thermostat-Con-
trolled Models), to control valve (Manually-
Controlled Models), or to gas control (Re-
mote-Ready Models) (see Figures 18 and 19).
Apply noncorrosive leak detection fluid to all
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, pages 20
and 21 [manually-controlled models] or pages
22 and 23 [thermostatically-controlled mod-
els]). Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli-
ance, page 21 [manually-controlled models] or
page 23 [thermostatically-controlled models]).

www.desatech.com 111160-01C
16
INSTALLING LOGS
CAUTION: After installation
and periodically thereafter,
check to ensure that no flame
comes in contact with any log.
With the heater set to HI, check
to see if flames contact any log.
If so, reposition logs according
to the log installation instruc-
tions in this manual. Flames
contacting logs will create soot.
WARNING: Failure to position
thepartsin accordancewiththese
diagrams or failure to use only
parts specifically approved with
this heater may result in property
damage or personal injury.
Dual Burner Smoky Mountain Oak
Models CGD3018PT/NT, CGD3924PT/NT
Each log is marked with a number. These num-
bers will help you identify the log when install-
ing. It is very important to install these logs ex-
actly as instructed. Do not modify logs. Only use
logs supplied with heater.
1. Locate pins on the bottom of back log (#1).
Slide these pins into the holes in the grate base
behind the burner (see Figure 20).
2. Place the base of the middle log (#2) in the U-
shaped slots of the grate base in front of the
back log. The cutout on the right of the middle
log should fit over the burner (see Figure 21).
Make sure the front of the middle log is resting
on the tabs of the grate base and the cutout area
is centered over the burner “U” bend.
3. Locate the recesses on the back of the front
log (#3). Fit these recesses between the posts
of the grate base (see Figure 22).
4. Locate the notches in the bottom of the cross-
over log (#4). Place the crossover log on top
of the middle log and front log. Make sure the
notches of the crossover log lines up with rect-
angular knobs on top of the middle and front
logs (see Figure 23).
5. Place lava rock around base of heater if de-
sired. Do not put lava rock on logs on burner.
INSTALLATION
Continued
Figure 21 - Installing Middle Log (#2)
Burner Cutout
Tab
U-Shaped Slot
Middle
Log (#2)
“U” Bend
Figure 20 - Installing Back Log (#1)
Pin
Hole in
Grate Base
Back Log
(#1)
Burner
Figure 22 - Installing Front Log (#3)
Figure 23 - Installing Crossover Log (#4)
Crossover
Log (#4)
Notches
Rectangular
Knobs
3
Front
Log (#3)
Post
Recess

www.desatech.com
111160-01C 17
INSTALLATION
Continued
WARNING: Failure to position
thepartsin accordancewiththese
diagrams or failure to use only
parts specifically approved with
this heater may result in property
damage or personal injury.
Dual Burner Biltmore Split Oak Models
CCL3018PTA/NTA, CCL3924PTA/NTA,
CCL3930PTB/NTB
Each log is marked with a number. These num-
bers will help you identify the log when install-
ing. It is very important to install these logs ex-
actly as instructed. Do not modify logs. Only use
logs supplied with heater.
1. Place the front log (#1) on the grate fingers.
Make sure the front log rests firmly between the
grate fingers and the grate base (see Figure 24).
2. Place the base of the middle log (#2) in the U-
shaped slots of the grate base. The cutout on the
right of the middle log should fit over the burner
(see Figure 25). Make sure the front of the middle
log is resting on the tabs of the grate base.
3. Locate pins on the bottom of back log (#3).
Slide these pins into the holes in the grate base
behind the burner (see Figure 26).
4. Locate holes on the bottom of crossover log
(#4). Slide front hole onto the left pin
(CCL3924PTA/NTA or CCL3930PTB/NTB)
or middle pin (CCL3018PA/NA or
CCL3018PTA/NTA) on the middle log (#2)
and the pin on the back log (#3). See Figure
27 for placement.
Figure 25 - Installing Middle Log #2
(CCL3930PTB/NTB Shown)
Figure 26 - Installing Rear Log #3
(CCL3930PTB/NTB Shown)
Middle
Log (#2)
Tab
Burner
U-Shaped Slot
Hole in
Grate Base
Pins
Burner
Rear
Log (#3)
Figure 24 - Installing Front Log #1
(CCL3930PTB/NTB Shown)
Front
Log (#1)
Grate
Fingers
Grate
Base
Figure 27 - Installing Crossover Log #4
(CCL3930PTB/NTB Shown)
Middle
Log (#2) Back Log
(#3)
Pins
Crossover
Log (#4)

www.desatech.com 111160-01C
18
INSTALLATION
Continued
Figure 28 - Installing Crossover Log #5
(CCL3930PTB/NTB Shown)
Crossover
Log (#4)
Front Log (#1)
Crossover
Log (#5)
Crossover
Log (#4)
Front
Log (#1)
Figure 29 - Installing Crossover Log #5
and Log #6 (CCL3018PA/NA and
CCL3018PTA/NTA Only)
Crossover
Log (#5)
Middle
Log (#2)
Crossover
Log (#6)
7
6
Figure 30 - Installing Crossover Log #6
(CCL3930PTB/NTB Shown)
Figure 31 - Installing Crossover Log #7
(Model CCL3930PTB/NTB Only)
Pins
Middle
Log (#2)Front
Log (#1)
Middle
Log (#2)
Crossover
Log (#6)
Holes
Pins
Crossover
Log (#6)
Crossover
Log (#7)
5. For CCL3924PTA/NTA and CCL3930PTB/NTB
Only: Locate pin and hole on the bottom of
crossover log (#5). Slide the pin into the hole
located in crossover log (#4). Slide the hole onto
the pin on front log (#1). See Figure 28.
For CCL3018PA/NA and CCL3018PTA/NTA
Only: Locate holes on the bottom of crossover
log (#5). Slide the holes over the left pins on
middle log (#2) and front log (#1). See Figure 29.
6. Locate holes on the bottom of crossover log
(#6). Slide these holes onto the right pins lo-
cated in middle log (#2) and front log (#1).
See Figure 30 for CCL3924PTA/NTA or
CCL3930PTB/NTB. See Figure 29 for
CCL3018PA/NA or CCL3018PTA/NTA.
7. For CCL3930PTB/NTB only: Locate holes on
the bottom of crossover log (#7). Slide onto
the pins located in crossover log (#6) and
middle log (#2). See Figure 31.
8. Add lava rock around base of heater if desired.
Do not place any lava rock on logs or burner.

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111160-01C 19
INSTALLATION
Continued
Single Burner Seasonal Oak Models
CRL2718P/N, CRL2718P/N
WARNING: Failure to position
thepartsin accordancewiththese
diagrams or failure to use only
parts specifically approved with
this heater may result in property
damage or personal injury.
The Seasonal Oak Log Set is a reversible log set.
This means that the two bottom logs may be turned
to face either direction. The top log, however, must
remain in the same position. Do not modify logs.
Only use logs supplied with heater.
1. Place the back log onto the back of the base
assembly. Make sure log sits forward against
the two posts in front of log (see Figure 32).
This log may be turned to face either direction.
2. Place front log onto grate on front of base as-
sembly. The log will fit down between grate
fingers and posts on front of base assembly
(see Figure 33). This log may be turned to face
either direction.
3. Place the crossover log on top of the back log
and front log making sure pins are inserted into
holes on top of logs 1 and 2 (see Figure 34).
This log must be placed as shown in Figure 34
or the pins will not seat into holes.
4. Add lava rock around base of heater if desired.
Do not put lava rock on logs or burner.
Figure 32 - Installing Back Log
Figure 33 - Installing Front Log
Front Log
Grate
Fingers
Figure 34 - Installing Crossover Log
Back Log
Post
Post
Post
Base
Assembly
Post
Base
Assembly
Crossover Log
Hole in
Back Log
Hole in
Front Log

www.desatech.com 111160-01C
20
OPERATING HEATER
MANUALLY-CONTROLLED
MODELS
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a fire or explosion may result
causing property damage, per-
sonal injury or loss of life.
A. This appliance has a pilot which must be
lighted by hand. When lighting the pilot,
follow these instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next
to the floor because some gas is heavier than
air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric 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.
C. Use only your hand to push in or turn the
gas control knob. Never use tools. If the
knob will not push in or turn by hand, don’t
try to repair it, call a qualified service tech-
nician or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a quali-
fied service technician to inspect the appli-
ance and to replace any part of the control
system and any gas control which has been
under water.
LIGHTING
INSTRUCTIONS
WARNING
• If fireplace has glass doors,
never operate this heater with
glass doors closed. If you op-
erate heater with doors closed,
heat buildup inside fireplace
will cause glass to burst. Make
sure there are no obstructions
across openings of fireplace.
• You must operate this heater
with a fireplace screen in place.
Make sure fireplace screen is
closed before running heater.
NOTICE: During initial operation
of new heater, burning logs will
give off a paper-burning smell.
Orange flame will also be
present. Open damper or win-
dow to vent smell. This will only
last a few hours.
Note: Home owners generally prefer to oper-
ate their heater with the chimney damper
closed. This will put all the heat into the room.
However, there may be times you will desire
the full flames of the HI heat setting but will
find the heat output excessive. You can open
the chimney damper (if you have one) fully or
partially to release some of the heat.
WARNING: Damper handle
will be hot if heater has been
running.
1. STOP! Read the safety information in col-
umn 1.
2. Make sure equipment shutoff valve is fully
open.
3. Press in and turn control knob clockwise
to the OFF position.
4. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor.
If you smell gas, STOP! Follow “B” in the
safety information, column 1. If you don’t
smell gas, go to the next step.