Desa Comfort Glow CGS2718P Specification sheet

ROYAL ENGLISH OAK AND WINCHESTER OAK
UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
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18" and 24" Variable Manually-
Controlled Models
CGS2718P, CGS2718N
CGS3124P, CGS3124N
CLD3018PA, CLD3018NA
24" Thermostatically-Controlled Models
CLD3924PTA, CLD3924NTA(Winchester Oak Model Shown)
VARIABLE MANUALLY-CONTROLLED MODELS ALSO DESIGN-CERTIFIED
AS VENTED DECORATIVE APPLIANCES
Patent Pending
WARNING: If the information in this manual is
not followed exactly, a fire or explosion may
result causing property damage, personal in-
jury, 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
byaqualifiedinstaller,serviceagency,orthe
gas supplier.
WARNING: Improper installation, adjust-
ment, alteration, service, or maintenance
cancauseinjuryorpropertydamage.Re-
fer to this manual for correct installation
and operational procedures. For assis-
tance 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 ad-
equate combustion and ventilation air
must be provided. Refer to Air for Com-
bustion and Ventilation section on page 4
of this manual.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
WARNING: This appliance is for installa-
tion 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 accor-
dance with ANSI Z21.11.2.
Exception:Donotinstall this appliance ina
factory-builtfireplacethatincludesinstruc-
tionsstatingithasnotbeentestedorshould
not be used with unvented gas logs.
This appliance may be installed in an aftermar-
ket,*permanentlylocated,manufactured(mobile)
home, where not prohibited by local codes.
This appliance is only for use with the type of gas
indicatedon theratingplate. Thisapplianceisnot
convertible for use with other gases.
Thisappliancemaybeinstalledinanaftermarket,*permanentlylocated,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.

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TABLE OF CONTENTS
SAFETY INFORMATION
SAFETY INFORMATION
DANGER: Carbon monoxide poisoning may lead
to death!
Carbon Monoxide Poisoning: Early signs of carbon monoxide
poisoningresemble the flu,with headaches,dizziness,or nausea.If
you have these signs, the fireplace may not be working properly.
Get fresh air at once! Have fireplace serviced. Some people are
more affected by carbon monoxide than others. These include
pregnantwomen,peoplewithheartorlungdiseaseoranemia,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 these gases. 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 fireplace.
WARNINGS
IMPORTANT: Read this owner’s manual carefully
andcompletelybeforetryingtoassemble,operate,or
service this fireplace. Improper use of this fireplace
can cause serious injury or death from burns, fire,
explosion, electrical shock, and carbon monoxide
poisoning.
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 furniture and
draperies.
Do not place clothing or other flammable material on
orneartheappliance. Never placeanyobjectsonthe
heater.
Heater base assembly becomes very hot when run-
ning heater. Keep children and adults away from hot
surface to avoid burns or clothing ignition. Heater
will remain hot for a time after shutdown. Allow
surface to cool before touching.
Carefully supervise young children when they are in
the room with heater. When using the hand-held
remote accessory, keep selector switch in the OFF
position to prevent children from turning on burners
with remote.
You must operate this heater with a fireplace screen
in place. Make sure fireplace screen is closed before
running heater.
Keeptheapplianceareaclear and free from combus-
tiblematerials,gasoline,andotherflammablevapors
and liquids.
TABLE OF CONTENTS
SAFETY INFORMATION ............................................................ 2
PRODUCT IDENTIFICATION ..................................................... 3
LOCAL CODES........................................................................... 4
UNPACKING ............................................................................... 4
PRODUCT FEATURES .............................................................. 4
AIR FOR COMBUSTION AND VENTILATION ........................... 4
INSTALLATION ........................................................................... 6
OPERATING HEATER.............................................................. 15
INSPECTING BURNERS.......................................................... 19
CLEANING AND MAINTENANCE ............................................ 19
TECHNICAL SERVICE ............................................................. 20
SERVICE HINTS....................................................................... 20
REPLACEMENT PARTS .......................................................... 20
TROUBLESHOOTING .............................................................. 21
OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB ... 24
SPECIFICATIONS .................................................................... 25
ILLUSTRATED PARTS BREAKDOWNAND PARTS LIST ....... 26
ACCESSORIES ........................................................................ 32
PARTS CENTRAL..................................................................... 32
OWNER’S REGISTRATION FORM.......................................... 33
WARRANTY INFORMATION...................................... Back Cover

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3
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) inside any structure. Lo-
catepropane/LPsupply tank(s)outdoors(propane/LPunits only).
3. To prevent performance problems, the use of a propane/LP
tank of less than 100 lbs. capacity is not recommended (pro-
pane/LP units only).
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 appliance (Variable Manually-Con-
trolled Models Only) (see Installing Damper Clamp Acces-
sory for Vented Operation, page 10).
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 qualified chimney cleaner. Creosote will ig-
nite if highly heated. Inspect chimney flue for damage. If dam-
aged, operate heater with flue damper closed.
7. 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 fire-
place opening has vents at the bottom, you must open the vents
before operating 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.
Note: During initial operation, slight smoking could occur due
to log curing and heater burning manufacturing residues.
9. To preventthe creationof soot,follow theinstructions inClean-
ing and Maintenance, page 19.
10. Before using furniture polish, wax, carpet cleaner, or similar
products, turn heater off. If heated, the vapors from these prod-
ucts may create a white powder residue within burner box or
on adjacent walls or furniture.
11. This heater needs fresh, outside air ventilation to run properly.
This heater has an Oxygen Depletion Sensing (ODS) safety
shutoff 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 21 through 23.
12. Do not run heater
• where flammable liquids or vapors are used or stored
• under dusty conditions
13. Do not use this heater to cook food or burn paper or other
objects.
14. Do not use heater if any part has been exposed to or under
water. Immediately call a qualified service technician to in-
spect the room heater and to replace any part of the control
system and any gas control which has been under water.
15. Do not operate heater if any log is broken. Do not operate
heater if a log is chipped (dime-sized or larger).
16. Turn heater off and let cool before servicing. Only a qualified
service person should service and repair heater.
17. Operating heater above elevations of 4,500 feet could cause
pilot outage.
18. Provide adequate clearances around air openings.
SAFETY INFORMATION
PRODUCT IDENTIFICATION
SAFETY INFORMATION
Continued
PRODUCT IDENTIFICATION
Figure1-YellowFlame Vent-FreeGasLogHeaterShown (Logs
May Vary by Model)
Front Log
Control Knob
Back Log
Burner
Piezo
Ignitor
Crossover Log

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LOCAL CODES
UNPACKING
PRODUCT FEATURES
AIR FOR COMBUSTION AND VENTILATION
Providing Adequate Ventilation
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/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.
PRODUCT FEATURES
OPERATION
Thisheater isclean burning. Itrequires nooutside venting.There is
noheatlossoutaventorupachimney.Heatisgeneratedbyrealistic,
dancing yellow flames. This heater is designed for vent-free opera-
tion with flue damper closed. It has been tested and approved to
ANSIZ21.11.2standardforunventedheaters.Stateandlocalcodes
in some areas prohibit the use of vent-free heaters. Non-thermostat
modelsmayalsobeoperatedasaventeddecorative (ANSIZ21.60)
product by opening flue damper.
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 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.
UNPACKING
CAUTION: Do not remove the metal data plates
from the grate assembly. The data plates contain
important product and safety information.
1. Remove logs and heater base assembly from carton. Note: Do
not pick up heater base assembly by burners. This could dam-
age heater. Always handle base assembly by grate.
2. Remove all protective packaging applied to logs and heater
for shipment.
3. Check allitems forany shippingdamage. If damaged,promptly
inform dealer where you bought heater.
AIR FOR COMBUSTION AND
VENTILATION
Today’s homes are built more energy efficient than ever. New
materials,increased insulation,and newconstruction methodshelp
reduce heat loss in homes. Home owners weather strip and caulk
aroundwindows anddoors tokeep thecold airout andthe warmair
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.
Exhaustfans,fireplaces,clothesdryers,andfuelburningappliances
drawairfromthehousetooperate.Youmustprovideadequatefresh
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 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.
WARNING: This heater shall not be installed in a
confined space or unusually tight construction un-
less provisions are provided for adequate combus-
tion and ventilation air. Read the following instruc-
tionstoinsureproperfresh airforthis andotherfuel-
burning appliances in your home.

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5
AIR FOR COMBUSTION AND VENTILATION
Providing Adequate Ventilation (Cont.)
Determining Fresh-Air Flow For Heater Location
Unusually tight construction is defined as construction
where:
a. walls and ceilings exposedtotheoutside 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 win-
dows and doors
and
c. caulking or sealants are applied to areas such as
joints around window and door frames,between sole
platesandfloors,betweenwall-ceilingjoints,between
wall panels, at penetrations for plumbing, electrical,
and gas lines, and at other openings.
Ifyourhomedoesnotmeet all of the three criteria above,
proceed to Determining Fresh-Air Flow For Heater Loca-
tion on page 5.
Confined Space and Unconfined Space
The National Fuel Gas Code ANSI Z223.1/NFPA 54 defines a
confined space as a space whose volume 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 unconfined space as
aspacewhosevolumeisnotlessthan50cubicfeetper1,000Btuper
hour (4.8 m3per 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
furnishedwithdoors, areconsidereda partoftheunconfinedspace.
* Adjoining rooms are communicating only if there are doorless
passageways or ventilation grills between them.
AIR FOR COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR
HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Usethis work sheet todetermineifyou have aconfinedorunconfined space.
Space:Includestheroominwhichyouwillinstallheaterplusanyadjoining
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: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling
height) = 2560 cu. ft. (volume of space)
Ifadditional ventilation toadjoiningroomis supplied withgrillsoropen-
ings, 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 = (Maximum Btu/Hr the space
can support)
Example: 2560 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 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 com-
bustion air from the outdoors and vents to the outdoors.
Example:
Gas water heater _____________ Btu/Hr
Vent-free heater + _____________ 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)
71,500 Btu/Hr (actual amount of Btu/Hr used)
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 adjoining
roomor add ventilation grills between rooms.See VentilationAirFrom
Inside Building, page 6.
B. Vent room directly to the outdoors. See Ventilation Air From Out-
doors, page 6.
C. Installa lower Btu/Hr heater,if lower Btu/Hr sizemakes roomunconfined.
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.
40,000
31,500
71,500
WARNING: If the area in which the heater may be
operated is smaller than that defined as an uncon-
fined space or if the building is of unusually tight
construction,provideadequatecombustionandven-
tilation air by one of the methods described in the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 Sec-
tion 5.3 or applicable local codes .

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AIR FOR COMBUSTION AND VENTILATION
Ventilation Air
INSTALLATION
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 ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion
and Ventilation for required size of ventilation grills or ducts.
Ventilation Air From Outdoors
Provideextrafreshairbyusingventilationgrills orducts.Youmust
provide two permanent openings: one within 12" of the ceiling and
one within 12" of the floor. Connect these items directly to the
outdoorsorspacesopentotheoutdoors.Thesespaces includeattics
andcrawlspaces.FollowtheNationalFuelGasCodeANSIZ223.1/
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-controlled power vent. Heated air
entering the attic will activate the power vent.
Figure 3 - Ventilation Air from Outdoors
Figure 2 - 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"
INSTALLATION
WARNING: A qualified service person must in-
stall heater. Follow all local codes.
WARNING: Before installing in a solid fuel burn-
ing 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.
NOTICE: State or local codes may only allow opera-
tionofthisapplianceinaventedconfiguration.Check
your state or local codes.
NOTICE: This heater is intended for use as supple-
mental 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
throughoutthehouse.Intheeventofapoweroutage,
you can use this heater as your primary heat source.

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7
INSTALLATION
Check Gas Type
Installation and Clearances
WARNING: Never install the heater
•in a bedroom or bathroom unless installed as a
vented appliance (Variable Manually-Controlled
Models Only) (see page 10)
•in a recreational vehicle
•where curtains, furniture, clothing, or other flam-
mable objects are less than 42 inches from the
front, top, or sides of the heater
•in high traffic areas
•in windy or drafty areas
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
heat-resistant sealant. Do not seal chimney flue
damper.
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
coveringsoroperatingheaterwhereimpurities(such
as, but not limited to, tobacco smoke, aromatic
candles, cleaning fluids, oil or kerosene lamps, etc.)
in the air exist, may discolor walls.
IMPORTANT: Vent-free heaters addmoisture tothe air.Although
this is beneficial, installing heater in rooms without enough venti-
lation air may cause mildew to form from too much moisture. See
Air for Combustion and Ventilation, pages 4 through 6.
CHECK GAS TYPE
Use only the correct gas type (natural or propane/LP) for your unit.
Ifyourgassupplyisnotcorrect,donotinstallheater.Calldealerwhere
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, ceil-
ing, and adjoining wall.
LOG SIZING REQUIREMENTS
Minimum Firebox Size
Log Front Rear
Size Height Depth Width Width*
18" 17" 14" 24" 20"
24" 17" 14" 28" 21"
MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size Side Wall Ceiling
18", 24" 16" 42"
*Measured at 14" Depth
INSTALLATION
Continued
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 opening to any com-
bustible material and wall should follow diagram in Figure 4.
B. Clearances from the top of the fireplace opening to the ceiling
should not be less than 42 inches.
Figure 4 - Minimum Clearance for Combustible to Wall
*Minimum 16 inches from Side Wall
*

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INSTALLATION
Installation and Clearances (Cont.)
INSTALLATION
Continued
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.Noncombustiblematerials(suchasslate,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: If you cannot meet these minimum clearances, you
must operate heater with chimney flue damper open. Go to Install-
ing Damper Clamp Accessory for Vented Operation, page 10.
If Using Mantel
You must have noncombustible material(s) above the fireplace
opening.Noncombustiblematerials(suchasslate,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.
IMPORTANT: If you cannot meet these minimum clearances, you
must operate heater with chimney flue damper open. Go to Install-
ing Damper Clamp Accessory for Vented Operation, page 10.
NOTICE: Manual control heaters may be used as a
ventedproduct.Ifso,youmust alwaysrun heaterwith
chimney flue damper open. If running heater with
damper open, noncombustible material above fire-
place opening is not needed. Go to
Installing Damper
Clamp Accessory for Vented Operation
, page 10.
Heat Resistant
Material (A)
Noncombustible Requirements for
Material Distance (A) Safe Installation
12" or more Noncombustiblematerialokay.
Between 8" and 12" 24"Model:Installfireplacehood
accessory (GA6050, GA6052,
or GA6053, see Accessories ,
page 32).
18" Model: Noncombustible
material okay.
Less than 8" Noncombustiblematerialmust
beextendedtoatleast8".See
Between 8" and 12", above. If
youcannotextendmaterial,you
must operate heater with flue
damper open.
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.)
Above Fireplace

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9
INSTALLATION
Mantel Clearances
Floor Clearances
INSTALLATION
Continued
MANTEL CLEARANCES
In addition to meeting noncombustible material clearances, you
must also meet required clearances between fireplace opening and
mantelshelf.Ifyoudonotmeettheclearanceslistedbelow,youwill
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 Clearance when
Using a Hood
IfminimumclearancesinFigure6arenotmet,youmusthaveahood.
Whenusingahood thereare stillcertain minimummantel clearances
required.Followminimumclearances showninFigure 7whenusing
a hood.
NOTICE: If your installation does not meet the mini-
mum 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 floor-
ing (see Figure 9).
NOTICE:Surfacetemperaturesofadjacent walls and
mantels become hot during operation. Walls and
mantels above the firebox may become hot to the
touch. If installed properly, these temperatures meet
the requirement of the national product standard.
Followallminimumclearancesshowninthismanual.
Figure 6 - Minimum Mantel Clearances Without Using Hood
14"
Min.
Combustible
Material
Noncombustible Material
Hearth
5"
Min.
Combustible
Material
Figure 9 - Minimum Fireplace
Clearances Above
Combustible Flooring
Figure 7 - Minimum Mantel Clearances When Using Hood
Figure 8 - Minimum Fireplace
Clearances If Installed at Floor
Level
Minimum Non-
Combustible
Material 8"
Min. 12" 15" 18"
All minimum
distances are
in inches
Log Set
18" and 24"
Models
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
Minimum Non-
Combustible
Material
Minimum Non-
Combustible
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" Model
18" Model
2 1/2"
6"
8"
10"
(GA6050, GA6052,
or GA6053)

107068
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10
INSTALLATION
Installing Damper Clamp Accessory For Vented Operation
Installing Heater Base Assembly
INSTALLATION
Continued
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
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 clearance to combustibles re-
quirements 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(toorder,seeAccessories,page32).Thiswillinsurevented
operation(seeFigure10).The damperclampwillkeepdamper 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
Figure 10 - Attaching Damper Clamp
INSTALLING HEATER BASE ASSEMBLY
WARNING: If installing in a sunken fireplace,
special care is needed. You must raise the fireplace
floortoallowaccess toheater controlpanel.Thiswill
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
bytheburner.Thiscoulddamageheater.Onlyhandle
base assembly by grates.
WARNING: You must secure this heater to fire-
place floor. If not, heater will move when you adjust
controls. Moving heater may cause a gas leak.
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.
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
• 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 11, page 11).
IMPORTANT: Hold gas regulator with wrench when connect-
ing 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 Install-
ing Logs, pages 13 through 15).
5. Center heater base and logs front-to-front and side-to-side in
fireplace.
6. Carefully remove logs without moving heater base.
CAUTION: Do not remove the metal data plates
attachedtotheheaterbaseassembly.Thedataplates
contain important warranty and safety information.
Manufactured Fireplace
Masonry Fireplace
Damper
Damper Clamp
Damper
Damper

107068
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11
11
INSTALLATION
Installing Heater Base Assembly (Cont.)
Connecting To Gas Supply
INSTALLATION
Continued
7. Mark screw locations through holes in mounting brackets (see
Figure12).If installingin a brick-bottomfireplace, 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 12).
Figure 12 - Attaching Base Assembly to Fireplace Floor
Masonry
Screw
Mounting
Bracket
Heater Gas
Regulator
Flexible Gas Hose
(if allowed by local codes)
Figure11-AttachingFlexibleGasHosetoHeaterGasRegulator
Fitting
CONNECTING TO GAS SUPPLY
WARNING: A qualified service person must con-
nect heater to gas supply. Follow all local codes.
CAUTION: Never connect propane/LP heater di-
rectly to the propane/LP supply. Propane/LP heaters
require an external regulator (not supplied). Install
the external regulator between the heater and pro-
pane/LP supply.
WARNING: This appliance requires a 1/2" NPT
(National Pipe Thread) inlet connection to the pres-
sure regulator.
Installation Items Needed
Beforeinstallingheater, makesureyou havetheitemslisted 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 32.
Forpropane/LP gas,the installermust supplyanexternal regulator.
Theexternalregulatorwillreduceincominggaspressure.Youmust
reduceincominggaspressuretobetween11 and14inchesofwater.
Ifyoudonotreduceincominggaspressure,heaterregulatordamage
could occur. Install external regulator with the vent pointing down
as shown in Figure 13. Pointing the vent down protects it from
freezing rain or sleet.
Figure 13 - External Regulator With Vent Pointing Down
Propane/LP
Supply Tank External
Regulator
Vent
Pointing
Down
CAUTION: Use only new, black iron or steel pipe.
Internally-tinnedcoppertubingmaybeusedincertain
areas. Check your local codes. Use pipe of 1/2" diam-
eter or greater to allow proper gas volume to heater. If
pipe is too small, undue loss of volume will occur.
WARNING: For natural gas units, never connect
heater to private (non-utility) gas wells. This gas is
commonly known as wellhead gas.

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12
INSTALLATION
Connecting To Gas Supply (Cont.)
Checking Gas Connections
INSTALLATION
Continued
Installation must include a 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 14).
IMPORTANT: Install equipment shutoff valve in an accessible
location.The maingas valveis forturningon orshutting offthe gas
to the appliance.
Checkyourbuildingcodesforanyspecialrequirementsforlocating
equipment shutoff valve to fireplaces.
Apply pipe joint sealant lightly to male NPT threads. This will
prevent excess sealant from going into pipe. Excess sealant in pipe
could result in clogged heater valves.
We recommend that you install sediment trap in supply line as
showninFigure14.Locatesedimenttrapwhereitiswithinreachfor
cleaning. Install in piping system between fuel supply and heater.
Locatesediment trap wheretrapped matter isnot likelyto 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: Use pipe joint sealant that is resistant
to liquid petroleum (LP) gas.
CAUTION: Avoid damage to regulator. Hold gas
regulator with wrench when connecting it to gas
piping and/or fittings.
Figure 14 - Gas Connection
* Purchase the optional CSA design-certified equipment shutoff
valve from your dealer. See Accessories, page 32.
** Minimum inlet pressure for purpose of input adjustment.
Tee Joint Cap Pipe Nipple
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)
Natural
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
Propane/LP
From External
Regulator
(11" W.C.** to
14 " W.C.
Pressure
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)andequipmentshutoffvalve fromgassupply piping.Pres-
sures in excess of 1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where equipment shutoff valve
was connected.
3. Pressurize supply piping system by either opening propane/LP
supplytank valvefor propane/LPgas oropening maingasvalve
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 com-
mercial leak detection solution 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 fittings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 15, page 13).
2. Pressurize supply piping system by either opening propane/LP
supplytank valvefor propane/LPgas oropening maingasvalve
located on or near gas meter for natural gas, or using com-
pressed air.
3. Check all joints from gas meter (natural gas) or propane/LP
supply to equipment shutoff valve (see Figure 16 or 17, page
13). Apply a commercial leak detection solution to all joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
WARNING: Never use an open flame to check for
a leak. Apply a commercial leak detection solution to
all joints. Bubbles forming show a leak. Correct all
leaks at once.
WARNING: Test all gas piping and connections
forleaksafterinstallingorservicing.Correctallleaks
at once.
CAUTION: For propane/LP units, make sure ex-
ternalregulatorhasbeeninstalled betweenpropane/
LPsupplyandheater.Seeguidelinesunder Connect-
ing to Gas Supply , page 11.
CHECKING GAS CONNECTIONS

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13
13
INSTALLATION
Checking Gas Connections (Cont.)
Installing Logs, Models CGS2718P, CGS2718N, CGS3124P and CGS3124N
INSTALLATION
Continued
Pressure Testing Heater Gas Connections
1. Open equipment shutoff valve (see Figure 15).
2. Open main gas valve located on or near gas meter for natural
gas or open propane/LP supply tank valve.
3. Make sure control knob of heater is in the OFF position.
4. Check all joints from gas meter (natural gas) or propane/LP
supply to equipment shutoff valve (see Figure 16 or 17). Ap-
ply a commercial leak detection solution to all joints. Bubbles
forming show a leak.
5. Correct all leaks at once.
6. Lightheater (seeOperatingHeater, pages15 through17[manu-
ally-controlled models] or pages 17 and 18 [thermostatically-
controlled models]). Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 17
[manually-controlled models] or page 18 [thermostatically-
controlled models]).
Figure 15 - Equipment Shutoff Valve
Figure 17 - Checking Gas Joints (Propane/LP Gas Only)
ON
POSITION
OFF
POSITION
Open
Closed
Equipment
Shutoff
Valve
Equipment Shutoff Valve
Propane/LP
Supply Tank Control
Valve
Location
Figure 16 - Checking Gas Joints (Natural Gas Only)
Gas
Meter
Equipment Shutoff Valve Control
Valve
Location
WARNING: Failure to position the parts in accor-
dancewiththesediagramsorfailuretouseonlyparts
specifically approved with this heater may result in
property damage or personal injury.
Each log is marked with a number. These numbers will help you
identify the log when installing. It is very important to install these
logs exactly as instructed. Do not modify logs. Only use logs
supplied with heater.
1. Locate pegs on the bottom of back log (#1). Slide these pegs into
the holes in the grate base behind the burner (see Figure 18).
INSTALLING LOGS, MODELS CGS2718P,
CGS2718N, CGS3124P AND CGS3124N
CAUTION:Afterinstallationandperiodicallythere-
after,checktoensure that noflamecomesincontact
withany log.WiththeheatersettoHigh,check tosee
if flames contact any log. If so, reposition logs ac-
cording to the log installation instructions in this
manual. Flames contacting logs will create soot.
Figure 18 - Installing Back Log
Back Log (#1)
Peg
Peg
Hole

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14
INSTALLATION
Installing Logs, Models CGS2718P, CGS2718N, CGS3124P and CGS3124N (Cont.)
Installing Logs, Models CLD3018PA, CLD3018NA, CLD3924PTA and CLD3924NTA
INSTALLATION
Continued
Figure 19 - Installing Front Log
Front Log (#2)
Notch
Tabs of
Grate Base
Figure 20 - Installing Crossover Log
Crossover
Log (#3)
Notch
Rectangular Knob
Notch
Rectangular
Knob
2. Locate the notches on the back of the front log (#2). Slide
these notches over the tabs of the grate base (see Figure 19).
3. Locatethe notchesin thebottom of thecrossover log(#3). Place
the crossover log on top of the back log and front log. Make
sure the notches of the crossover log line up with rectangular
knobs on top of the back and front logs (see Figure 20).
4. Add lava rock around base of heater. Do not place lava rock
on logs or burner.
INSTALLING LOGS, MODELS CLD3018PA,
CLD3018NA, CLD3924PTA AND CLD3924NTA
WARNING: Failure to position the parts in accor-
dancewiththesediagramsorfailuretouseonlyparts
specifically approved with this heater may result in
property damage or personal injury.
CAUTION:Afterinstallationandperiodicallythere-
after,checktoensure that noflamecomesincontact
withany log.WiththeheatersettoHigh,check tosee
if flames contact any log. If so, reposition logs ac-
cording to the log installation instructions in this
manual. Flames contacting logs will create soot.
Each log is marked with a number. These numbers will help you
identify the log when installing. It is very important to install these
logs exactly as instructed. Do not modify logs. Only use logs
supplied with heater.
1. Place the base of the middle log (#1) 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 21). Make sure the front of the
middle log is resting on the tabs of the grate base and the cut-
out area is centered over the burner “U” bend.
2. Locate pegs on the bottom of back log (#2). Slide these pegs
into the holes in the grate base behind the burner (see Figure 22,
page 15).
3. Locate the notches in the bottom of the front log (#3). Place the
front log on the grate fingers. Make sure the notches of the front
log line up with the grate fingers (see Figure 23, page 15).
4. Place crossover log (#4) onto the pin (right) on back log (#2) and
into the recess of the middle log (#1) (see Figure 24, page 15).
5. Add lava rock around base of heater. Do not place any lava
rock on logs or burner.
Figure 21 - Installing Middle Log (#1)
Middle Log (#1)
Tab
Burner
“U”Bend
U-Shaped Slot

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15
15
INSTALLATION
Installing Logs, Models CLD3018PA, CLD3018NA, CLD3924PTA and CLD3924NTA (Cont.)
OPERATING HEATER Manually-Controlled Models
For Your Safety Read Before Lighting
INSTALLATION
Continued
Figure 22 - Installing Back Log (#2)
Figure 24 - Installing Crossover Log (#4)
Front Log (#3)
Notches
Grate Fingers
Figure 23 - Installing Front Log (#3)
Hole in
Grate Base
Back Log (#2)
Peg
Burner
Crossover
Log (#4)
Recess
Peg
OPERATING HEATER
WARNING:Ifyoudonotfollowtheseinstructions
exactly, a fire or explosion may result causing prop-
erty damage, personal 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 de-
partment.
C. Useonlyyourhand to push inorturn thegascontrolknob.
Never use tools. If the knob will not push in or turn by
hand, don’t try to repair it, call a qualified service techni-
cian 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 qualified service technician to inspect
the appliance and to replace any part of the control system
and any gas control which has been under water.
FOR YOUR SAFETY READ
BEFORE LIGHTING
MANUALLY-CONTROLLED MODELS

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16
OPERATING HEATER Manually-Controlled Models
Lighting Instructions
Variable Control Operation
OPERATING HEATER
Continued
WARNING:DonotoperateheaterbetweenPILOT
and HIGH positions.
1. STOP! Read the safety information page 15, column 2.
2. Make sure equipment shutoff valve is fully open.
3. Press in and turn control knob clockwise
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! Fol-
low “B” in the safety information page 15, column 2. If you
don’t smell gas, go to the next step.
5. Slightly depress and turn control knob counterclockwise
C-clockwise
to the PILOT position. Press in control knob for
five (5) seconds (see Figure 25).
Note: You may be running this heater for the first time
after hooking up to gas supply. If so, the control knob may
need to be pressed in for 30 seconds or more. This will al-
low air to bleed from the gas system.
6. With control knob pressed in, press and release ignitor but-
ton. This will light pilot.The pilot is attached to the burner.
If needed, keep pressing ignitor button until pilot lights.
WARNING:
•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. Also if fireplace
opening has vents at the bottom, you must open
the vents before operating heater.
•Youmustoperatethisheaterwithafireplacescreen
in place. Make sure fireplace screen is closed
before running heater.
NOTICE:Duringinitialoperationofnewheater,burning
logs will give off a paper-burning smell. Orange flame
will also be present. Open damper or window to vent
smell. This will only last a few hours.
Note: Home owners generally prefer to operate 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.
Note: If pilot does not stay lit, contact a qualified service
person or gas supplier for repairs. Until repairs are made,
light pilot withmatch.To light pilot with match, see Manual
Lighting Procedure, page 17.
7. Keep control knob pressed in for 30 seconds after lighting
pilot. After 30 seconds, release control knob.
Note: If pilot goes out, repeat steps 3 through 7.
• If control knob does not pop out when released, contact
a qualified service person or gas supplier for repairs.
8. Slightly depress and turn control knob counterclockwise
C-clockwise
to desired heating level. The burner should light.
Set control knob to any heat level between HI and LO.
LIGHTING INSTRUCTIONS
Figure 26 - Pilot
Figure 25 - Control Knob and Ignitor Button Location
PILOT
OFF
LO
HI
Control Knob
Ignitor Button
Thermocouple
Ignitor Electrode Pilot Burner Ignitor Electrode Pilot
Burner
CAUTION: Do not try to adjust heating levels by
using the equipment shutoff valve.
The variable control valve can be set to any heat setting and
flame height desired, by simply turning the control knob until
that setting is attained. Even the lowest setting provides realis-
tic, dancing yellow flames. Selecting higher settings produces
greater heat output. This results in increased heating comfort.
VARIABLE CONTROL OPERATION
Propane/LP Natural Gas

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17
17
OPERATING HEATER Manually-Controlled Models
To Turn Off Gas To Appliance
Manual Lighting Procedure
OPERATING HEATER Thermostatically-Controlled Models
For Your Safety Read Before Lighting
Lighting Instructions
Shutting Off Heater
1. Press in and turn control knob clockwise
Clockwise
to the
HIGH position.
2. Turn control knob clockwise
Clockwise
to the pilot position.
3. Press in control knob and turn clockwise
Clockwise
to the
OFF position.
Shutting Off Burners Only (pilot stays lit)
1. Turncontrol knob clockwise
Clockwise
totheHIGHposition.
2. Press in and turn control knob clockwise
Clockwise
to the
pilot position.
TO TURN OFF GAS TO APPLIANCE
1. Followsteps1through5underLightingInstructions,page16.
2. Depress control knob and light pilot with match.
3. Keep control knob pressed in for 30 seconds after lighting
pilot. After 30 seconds, release control knob. Now follow
step 8 under Lighting Instructions, page 16.
MANUAL LIGHTING PROCEDURE
OPERATING HEATER
Continued
WARNING:Ifyoudonotfollowtheseinstructions
exactly, a fire or explosion may result causing prop-
erty damage, personal 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 de-
partment.
FOR YOUR SAFETY READ
BEFORE LIGHTING
C. Useonlyyourhand to push inorturn thegascontrolknob.
Never use tools. If the knob will not push in or turn by
hand, don’t try to repair it, call a qualified service techni-
cian 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 qualified service technician to inspect
the appliance and to replace any part of the control system
and any gas control which has been under water.
THERMOSTATICALLY-CONTROLLED
MODELS
1. STOP! Read the safety information, column 1.
2. Make sure equipment shutoff valve is fully open.
3. Turn control knob clockwise
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! Fol-
low “B” in the safety information, column 1. If you don’t
smell gas, go to the next step.
WARNING
•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. Also if fireplace
opening has vents at the bottom, you must open
the vents before operating heater.
•Youmustoperatethisheaterwithafireplacescreen
in place. Make sure fireplace screen is closed
before running heater.
NOTICE:During initialoperationofnewheater,burn-
ing logs will give off a paper-burning smell. Orange
flamewillalsobepresent.Opendamperorwindowto
vent smell. This will only last a few hours.
Note: Home owners generally prefer to operate 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.
LIGHTING INSTRUCTIONS

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18
OPERATING HEATER Thermostatically-Controlled Models
Lighting Instructions (Cont.)
To Turn Off Gas To Appliance
Thermostat Control Operation
Manual Lighting Procedure
OPERATING HEATER
Continued
CAUTION: Do not try to adjust heating levels by
using the equipment shutoff valve.
5. Turncontrolknobcounterclockwise
C-clockwise
to thePILOT
position. Press in control knob for five (5) seconds (see Fig-
ure 27).
Note: You may be running this heater for the first time
after hooking up to gas supply. If so, the control knob may
need to be pressed in for 30 seconds or more. This will al-
low air to bleed from the gas system.
• If control knob does not pop out when released, contact
a qualified service person or gas supplier for repairs.
6. With control knob pressed in, press and release ignitor but-
ton. This will light pilot. The pilot is attached to the front
burner.Ifneeded,keeppressingignitorbuttonuntilpilotlights.
Note: If pilot does not stay lit, contact a qualified service
person or gas supplier for repairs. Until repairs are made,
light pilot withmatch.To light pilot with match, see Manual
Lighting Procedure.
7. Keep control knob pressed in for 30 seconds after lighting
pilot. After 30 seconds, release control knob.
Note: Ifpilot goesout, repeatsteps3through7.This heater
has a safety interlock system. Wait one (1) minute for sys-
tem to reset before lighting pilot again.
8. Turn control knob counterclockwise
C-clockwise
to desired
heating level.The burners should light. Set control knob to
any heat level between HI and LO.
LO
HI
OFF
Pilot
Figure 27 - Control Knob and Ignitor Button Location
Figure 28 - Pilot
Control Knob
Ignitor Button
Thermocouple
Ignitor Electrode Pilot Burner Ignitor Electrode Pilot
Burner
TO TURN OFF GAS TO APPLIANCE
Shutting Off Heater
Turn control knob clockwise
Clockwise
to the OFF position.
Shutting Off Burners Only (pilot stays lit)
Turn control knob clockwise
Clockwise
to the PILOT position.
THERMOSTAT CONTROL OPERATION
The thermostat control knob can be set to any comfort level
between HI and LO. The thermostat will gradually modulate
the heat output and flame height from higher to lower settings,
or pilot, in order to maintain the comfort level you select. The
idealcomfortsettingwillvarybyhouseholddependinguponthe
amount of space to be heated, the output of the central heating
system, etc.
Note: Selecting the HI setting with the control knob will cause
theburnertoremainfullyon,withoutmodulatingdowninmost
cases.
1. Followsteps1through5 underLighting Instructions, pages
17 and 18.
2. Depress control knob and light pilot with match.
3. Keep control knob pressed in for 30 seconds after lighting
pilot. After 30 seconds, release control knob. Now follow
step 8 under Lighting Instructions, column 1.
MANUAL LIGHTING PROCEDURE
Propane/LP Natural Gas

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19
INSPECTING BURNERS
Pilot Flame Pattern
Burner Primary Air Holes
Main Burner
CLEANING AND MAINTENANCE
ODS/Pilot And Burner
Cleaning Burner Injector Holder and Pilot Air Inlet Hole
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in the fitting at the
entrance to the burner. These holes may become blocked with dust
or lint. Periodically inspect these holes for any blockage and clean
as necessary. Blocked air holes will create soot.
MAIN BURNER
Periodicallyinspectallburnerflameholeswiththeheaterrunning.All
slottedburner flameholesshould beopen withyellowflame present.
All round burner flame holes should be open with a small blue flame
present. Some burner flame holes may become blocked by debris or
rust,withno flamepresent. Ifso,turnoff heaterand letcool.Remove
blockage, blocked burner flame holes will create soot.
INSPECTING BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 29 shows a correct pilot flame pattern. Figure 30 shows an
incorrect pilot flame pattern. The incorrect pilot flame is not
touching the thermocouple. This will cause the thermocouple to
cool. When the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 30
• turn heater off(see ToTurnOffGas toAppliance, page17 [manu-
ally-controlled models] or page 18 [thermostatically-controlled
model])
• see Troubleshooting, pages 21 through 23
Figure 29 - Correct Pilot Flame Pattern
Figure 30 - Incorrect Pilot Flame Pattern
Thermocouple
Pilot Burner Thermocouple Pilot Burner
Thermocouple
Pilot Burner Thermocouple Pilot Burner
CLEANING AND
MAINTENANCE
WARNING: Turn off heater and let cool before
cleaning.
CAUTION: You must keep control areas, burner,
and circulating air passageways of heater clean.
Inspect these areas of heater before each use. Have
heaterinspectedyearlybyaqualifiedserviceperson.
Heater may need more frequent cleaning due to
excessive lint from carpeting, bedding material, pet
hair, etc.
ODS/PILOT AND BURNER
• Use a vacuum cleaner or small, soft bristled brush to clean.
CLEANING BURNER INJECTOR HOLDER
AND PILOT AIR INLET HOLE
Theprimaryairinlet holesallow theproper amountofairtomix with
the gas. This provides a clean burning flame. Keep these holes clear
of dust, dirt, and lint. Clean these air inlet holes prior to each heating
season. Blocked air holes will create soot. We recommend that you
clean the unit every 2,500 hours of operation or every three months.
We also recommend that you keep the burner tube and pilot
assembly clean and free of dust and dirt. To clean these parts we
recommendusingcompressedairnogreaterthan30PSI.Yourlocal
computer store, hardware store, or home center may carry com-
pressed air in a can. You can use a vacuum cleaner in the blow
position. If using compressed air in a can, please follow the direc-
tionsonthecan.Ifyoudon'tfollowdirectionsonthecan, youcould
damage the pilot assembly.
1. Shut off the unit, including the pilot.Allow the unit to cool for
at least thirty minutes.
2. Inspect burner, pilot, and primary air inlet holes on injector
holder for dust and dirt (see Figure 31).
3. Blow air through the ports/slots and holes in the burner.
Figure 31 - Injector Holder On Outlet Burner Tube
Burner Tube
Primary Air Inlet Holes
(Shape of Holes May
Vary by Model)
Injector Holder
(May Be Brass or
Aluminum
Depending on
Model)
Propane/LP Natural Gas
Propane/LP Natural Gas

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20
4. Check the injector holder located at the end of the burner tube
again. Remove any large particles of dust, dirt, lint, or pet hairs
with a soft cloth or vacuum cleaner nozzle.
5. Blow air into the primary air holes on the injector holder.
6. In case any large clumps of dust have now been pushed into
the burner repeat steps 3 and 4.
Clean the pilot assembly also. A yellow tip on the pilot flame
indicates dust and dirt in the pilot assembly. There is a small pilot
airinletholeabouttwoinchesfromwherethepilotflamecomesout
ofthe pilotassembly(see Figure32). Withtheunit off,lightly blow
airthroughtheairinlethole.Youmayblowthroughadrinkingstraw
if compressed air is not available.
CLEANING AND MAINTENANCE
TECHNICAL SERVICE
SERVICE HINTS
REPLACEMENT PARTS
CLEANING AND
MAINTENANCE
Continued
Figure 32 - Pilot Inlet Air Hole
Burner Tube
Pilot Assembly
Pilot Air
Inlet Hole
Ports/Slots
LOGS
• If you remove logs for cleaning, refer to Installing Logs, page
13 through 15, to properly replace logs.
• Replace log(s) if broken or chipped (dime-sized or larger).
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the 8 holes in the brass fitting
attheentrance tothe burner.Theseholesmay becomeblockedwith
dust or lint. Periodically inspect these holes for any blockage and
clean as necessary. Blocked air holes will create soot.
MAIN BURNER
Periodicallyinspectallburnerflameholeswiththeheaterrunning.All
slottedburner flameholesshould beopen withyellowflame present.
All round burner flame holes should be open with a small blue flame
present. Some burner flame holes may become blocked by debris or
rust,withno flamepresent. Ifso,turnoff heaterand letcool.Remove
blockage, blocked burner flame holes will create soot.
TECHNICAL SERVICE
You may have further questions about installation, operation, or
troubleshooting. If so, contact DESA International’s Technical
Service Department at 1-866-672-6040.
You can also visit DESA International’s technical service web site
at www.desatech.com.
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burners will have delayed ignition
• heater will not produce specified heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If so, contact your local
natural or propane/LP gas supplier.
REPLACEMENT PARTS
Note: Use only original replacement parts. This will protect your
warranty coverage for parts replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product. If they can’t supply
original replacement part(s), call DESA International’s Technical
Service Department at 1-866-672-6040.
When calling DESA International, have ready
• your name
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
Usually, we will ask you to return the part to the factory.
PARTS NOT UNDER WARRANTY
Contactauthorizeddealersofthisproduct. Ifthey can’tsupplyoriginal
replacement part(s), call DESA International at 1-866-672-6040 for
referral information.
When calling DESA International, have ready
• model number of your heater
• the replacement part number