Desa T Quick start guide

UNVENTED (VENT-FREE) GAS LOG
HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Save this manual for future reference.
Save this manual for future reference.
WARNING: If the information in this manual
is not followed exactly, a fire or explosion
may result causing property damage, per-
sonal injury, or loss of life.
— Do not store or use gasoline or other
flammablevaporsandliquidsinthevicinity
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.
• Immediatelycallyourgassupplierfroma
neighbor’s phone. Follow the gas
supplier’s instructions.
• Ifyoucannotreachyourgassupplier,call
the fire department.
— Installation and service must be performed
by a qualified installer, service agency, or
the gas supplier.
WARNING: Improper installation, adjust-
ment, alteration, service, or maintenance
can cause injury or property damage. 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 appliance is for installa-
tion only in a solid-fuel burning masonry
or UL127 factory-built fireplace, or in a
listed ventless firebox enclosure. It is de-
sign-certified for these installations in ac-
cordance with ANSI Z21.11.2. Exception:
Do not install this appliance in a factory-
built fireplace that includes instructions
statingithasnotbeentestedorshouldnot
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.
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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
ratingplate.Thisapplianceisnotconvertibleforusewithothergases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
18", 24" and 30" Variable
Manually-Controlled Models
FLAME-MAX®Vintage
Oak Log Design
FLAME-MAX®Golden
Oak Log Design
18", 24", 30", and 36" Variable
Manually-Controlled and
18", 24", and 30" Thermostat-
Controlled Models
18", 24", 30", and 36" Remote-
Ready Model
18", 24", and 30" Variable
Manually-Controlled Model
18", 24", and 30"
Remote-Ready Models
FLAME-MAX®Birch Log
Design
Remote-Ready and Variable Manually-Controlled Models Also Design-Certified As Vented Decorative Appliances
LO
HI
OFF
Pilot

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WARNING: Do not use a blower insert, heat
exchanger insert, or other accessory not approved
for use with this heater.
WARNING:Donot 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.
Due to high temperatures, the appliance should be
located out of traffic and away from furniture and
draperies.
Donotplaceclothingorotherflammablematerialon
or near the appliance. Never place any objects on
the 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
remoteaccessory(Remote-ReadyModelsOnly),keep
selector switch in the OFF position to prevent chil-
dren from turning on burners with remote.
TABLE OF CONTENTS
SAFETY INFORMATION ...................................................................2
PRODUCT IDENTIFICATION ............................................................4
OPTIONAL REMOTE CONTROLACCESSORIES ...........................5
LOCAL CODES..................................................................................5
UNPACKING ......................................................................................5
PRODUCT FEATURES .....................................................................5
AIR FOR COMBUSTION AND VENTILATION ..................................5
INSTALLATION ..................................................................................8
OPERATING HEATER.....................................................................17
INSPECTING BURNERS ................................................................22
CLEANING AND MAINTENANCE ...................................................23
SAFETY INFORMATION
DANGER: Carbon monoxide poisoning may lead
to death!
Carbon Monoxide Poisoning: Early signs of carbon monoxide
poisoning resemble the flu, with headaches, dizziness, or nausea.
If you have these signs, the heater may not be working properly.
Get fresh air at once! Have heater serviced. Some people are
more affected by carbon monoxide than others. These include
pregnant women, people with heart or lung disease or anemia,
those under the influence of alcohol, and those at high altitudes.
Natural and Propane/LP Gas: Natural and propane/LP gases are
odorless. An odor-making agent is added to the gas. The odor
helpsyoudetectagasleak.However,theodoraddedtothegascan
fade. Gas may be present even though no odor exists.
Make certain you read and understand all warnings. Keep this
manual for reference. It is your guide to safe and proper operation
of this heater.
WARNINGS
IMPORTANT: Read this owner’s manual carefully and
completely before trying to assemble, operate, or ser-
vicethisheater.Improper use of this heater can cause
serious injury or death from burns, fire, explosion,
electrical shock, and carbon monoxide poisoning.
WARNING:Anychangetothisheateroritscontrols
can be dangerous.
TABLE OF CONTENTS
SAFETY INFORMATION
TROUBLESHOOTING .....................................................................24
OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB....27
SPECIFICATIONS ...........................................................................28
WIRING DIAGRAM ..........................................................................29
SERVICE HINTS..............................................................................29
TECHNICAL SERVICE ....................................................................29
REPLACEMENT PARTS .................................................................29
ILLUSTRATED PARTS BREAKDOWNAND PARTS LIST ..............30
ACCESSORIES ...............................................................................44
OWNER’S REGISTRATION FORM .................................................45
WARRANTY INFORMATION............................................ Back Cover
WARNING:Thisproductcontainsand/orgenerates
chemicals known to the State of California to cause
cancer or birth defects, or other reproductive harm.

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You must operate this heater with a fireplace screen
in place. Make sure fireplace screen is closed before
running heater.
Keeptheappliance area clear and free from combus-
tiblematerials,gasoline,andotherflammablevapors
and liquids.
SAFETY INFORMATION
Continued
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/LPsupplytank(s)outdoors(propane/LPunitsonly).
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
4. This heater shall not be installed in a bedroom or bathroom,
unless installed as a vented appliance. See Installing Damper
Clamp Accessory for Vented Operation, page 11 (Remote-
Ready and Variable Manually-Controlled Models Only).
5. Before installing in a solid fuel burning fireplace, the chimney
flue and firebox must be cleaned of soot, creosote, ashes and
loose paint by a qualified chimney cleaner. Creosote will ig-
nite if highly heated. Inspect chimney flue for damage. If dam-
aged, repair flue before operating heater.
6. Do not burn solid-fuel in a masonry or UL127 factory-built
fireplace in which a vent-free room heater is installed.
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. Make sure
there are no obstructions across openings of fireplace.
8. To prevent the creationof soot,follow the instructions in Clean-
ing and Maintenance, page 23.
9. 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 and furniture.
10. 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 enough fresh
air is not available. See Air for Combustion and Ventilation,
pages 5 through 7. If heater keeps shutting off, see Trouble-
shooting, pages 24 through 26.
11. Do not run heater
• where flammable liquids or vapors are used or stored
• under dusty conditions
12. Do not use this heater to cook food or burn paper or other
objects.
13. 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.
14. Do not operate heater if any log is broken. Do not operate
heater if a log is chipped (dime-sized or larger).
15. Turn heater off and let cool before servicing, installing, or re-
pairing. Make sure the selector switch is in the OFF position
(Remote-Ready Models Only). Only a qualified service per-
son should install, service, or repair heater.
16. Make sure the selector switch is in the OFF position when you
are away from home for long periods of time (Remote-Ready
Models Only).
17. Operating heater above elevations of 4,500 feet may cause pi-
lot outage.
18. To prevent performance problems, do not use propane/LPfuel
tank of less than 100 lb. capacity (propane/LP units only).
19. Provide adequate clearances around air openings.
SAFETY INFORMATION

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PRODUCT IDENTIFICATION
Figure 1 - Product Identification
Burner
Flame-Max®Vintage Oak Logs
Flame-Max®Birch Logs
One Piece
Log Set
Control Knob
Piezo Ignitor
Burner Assembly
AUTO
ON
OFF
COOLER
WARMER
TEMP
Control Knob
Piezo Ignitor
Optional
Remote
Control
Flame Adjustment Knob
Optional Selector Switch Base Assembly
Control Knob
Flame-Max®Golden Oak Logs
Piezo Ignitor
Burner Assembly
AUTO
ON
OFF
COOLER
WARMER
TEMP
Piezo
Ignitor
One Piece
Log Set
One Piece
Log Set
One Piece
Log Set
Optional
Remote
Control
Control Knob
Flame Adjustment Knob
Optional Selector Switch Base Assembly
Control Knob
Piezo Ignitor
Burner Assembly
One Piece
Log Set
PRODUCT IDENTIFICATION

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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 required, thermostat
operation is not permitted.
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 all items for any shipping damage.If damaged,promptly
inform dealer where you bought heater.
UNPACKING
CAUTION:Donotremovethedataplatesfromthe
grate assembly. The data plates contain important
warranty and safety information.
AIR FOR COMBUSTION AND
VENTILATION
Today’s homes are built more energy efficient than ever. New mate-
rials,increased insulation, andnew construction methods help reduce
heat loss in homes. Home owners weather strip and caulk around
windowsanddoorstokeepthecoldairoutandthewarmairin.During
heatingmonths,homeownerswanttheirhomesasairtightaspossible.
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.
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-
tions to insure proper fresh air for this and other
fuel-burning appliances in your home.
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 5 through 7 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.
OPTIONAL REMOTE
CONTROL ACCESSORIES
There are four optional remote controls that can be purchased
separately for Remote-Ready Models Only:
• wall switch • hand-held ON/OFF remote
• wall thermostat • hand-held thermostat remote.
See Accessories, page 44.
Thewallthermostatorhand-heldthermostatmaynotbeusedwhere
vented decorative listing is required.
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 both
realistic flames and glowing coals. 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 decorative (ANSI Z21.60)
productbyopeningthefluedamper(Non-ThermostatModelsOnly).
SAFETY DEVICE
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.
OPTIONAL REMOTE CONTROL ACCESSORIES
LOCAL CODES
UNPACKING
PRODUCT FEATURES
AIR FOR COMBUSTION AND VENTILATION
Providing Adequate Ventilation

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40,000
33,000
73,000
Unusually tight construction is defined as construction
where:
a. walls and ceilings exposed to the outside atmosphere
have a continuous water vapor retarder with a rating
of one perm (6 x 10-11 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-ceiling joints,between
wall panels, at penetrations for plumbing, electrical,
and gas lines, and at other openings.
If your home meets all of the three criteria above,
you must provide additional fresh air.See Ventilation
Air From Outdoors , page 7 .
Ifyourhomedoesnot meet all of the three criteria above,
proceed to Determining Fresh-Air Flow For Heater Loca-
tion, below.
Confined 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,areconsideredapartoftheunconfinedspace.
* Adjoining rooms are communicating only if there are doorless
passageways or ventilation grills between them.
DETERMINING FRESH-AIR FLOW FOR
HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Usethis worksheet todetermine ifyouhaveaconfined orunconfined 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 ventilationto adjoiningroom issupplied withgrills oropen-
ings, add the volume of these rooms to the total volume of the space.
AIR FOR COMBUSTION AND
VENTILATION
Continued
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 .
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)
73,000 Btu/Hr (actual amount of Btu/Hr used)
Thespacein the above example isaconfined space because the actualBtu/
Hrusedismorethanthemaximum Btu/Hrthespacecansupport.Youmust
provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the ex-
tra space provides an unconfined space, remove door to adjoining
roomoradd ventilation grills betweenrooms.See VentilationAirFrom
Inside Building, page 7.
B. Vent room directly to the outdoors. See Ventilation Air From Out-
doors, page 7.
C. Installa lowerBtu/Hrheater,if lowerBtu/Hrsize makesroom unconfined.
Ifthe actualBtu/Hr usedislessthanthe maximumBtu/Hr thespace cansupport,
thespaceisanunconfinedspace.Youwillneednoadditionalfreshairventilation.
AIR FOR COMBUSTION AND VENTILATION
Providing Adequate Ventilation (Cont.)
Determining Fresh-Air Flow for Heater Location

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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
Provideextrafreshairbyusingventilation grillsorducts.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.Thesespacesincludeattics
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-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
AIR FOR COMBUSTION AND VENTILATION
Ventilation Air
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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INSTALLATION
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.
WARNING: A qualified service person must in-
stall heater. Follow all local codes.
NOTICE: State or local codes may only allow opera-
tionofthisapplianceinaventedconfiguration.Check
your state or local codes.
WARNING:Makesuretheselectorswitchisinthe
OFFpositionbeforeinstallingheater(Remote-Ready
Models Only).
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 and firebox may
create and distribute soot within the house. Inspect
chimney flue for damage. If damaged, repair flue
before operating heater.
WARNING: Seal any fresh air vents or ash clean-
out doors located on floor or wall of fireplace. If not,
draftingmaycausepilotoutageorsooting.Useaheat-
resistant sealant. Do not seal chimney flue damper.
WARNING: Never install the heater
•in a bedroom or bathroom unless installed as a
ventedappliance,seepage11(Remote-Readyand
Variable Manually-Controlled Models Only)
•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
INSTALLATION AND CLEARANCES FOR
VENT-FREE OPERATION
WARNING: Maintain the minimum clearances. If
you can, provide greater clearances from floor, ceil-
ing, and adjoining wall.
IMPORTANT: Vent-freeheaters add moistureto the 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 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 log set. Call dealer
where you bought log set for proper type fireplace.
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 or cause odors.
INSTALLATION
Check Gas Type
Installation and Clearances for Vent-Free Operation
LOG SIZING REQUIREMENTS
Log Minimum Firebox
Size Height Depth Front Rear *
Width Width
18" 17" 14" 24" 20"
24" 17" 14" 28" 21"
30" 17" 14" 34" 24"
36" 17" 14" 40" 30"
MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size Side Wall Ceiling
18", 24", 16" 42"
30", and 36"
* Measured at 14" depth.

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Carefully follow the instructions below. This will ensure safe
installation into a masonry, UL127-listed manufactured fireplace,
or listed vent-free firebox.
Minimum Clearances For Side Combustible
Material, Side Wall, and Ceiling
A. Clearances from theside of the fireplace cabinetto any combus-
tible material and wall should follow diagram in Figure 4.
Example: The face of a mantel, bookshelf, etc. is made of
combustible material and protrudes 3 1/2" from the wall. This
combustible material must be 4" from the side of the fireplace
cabinet (see Figure 4).
Note: When installing your gas logs into a manufactured firebox,
followfireboxmanufacturer’sinstructionsforminimumclearances
to combustible materials.
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
*
Example
INSTALLATION
Continued
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.)
Above Fireplace
Noncombustible Requirements for
Material Distance (A) Safe Installation
12" or more Noncombustible material OK.
Between 8" and 12" 24" ,30" or 36" Models: Install
fireplace hood accessory (GA6050,
GA6052, or GA6053 see Accesso-
ries , page 44).
18" Model: Noncombustible
material OK.
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 Clearances
If Not Using Mantel
Note: If using a mantel proceed to If Using Mantel. If not using a
mantel, follow the information on this page.
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
lessthan12",youmustinstallthefireplacehoodaccessory(24",30"
and 36" Models Only). See Figure 5 for minimum clearances.
NOTICE: Manual control heaters may be used as a
ventedproduct.Ifso,youmust alwaysrunheaterwith
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 11.
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",30"and36"ModelsOnly).Evenifnoncombustible
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, page 10, 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 11.
INSTALLATION
Installation and Clearances for Vent-Free Operation (Cont.)
Heat Resistant
Material (A)

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10
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"/30"/36" Models
18" Model
2 1/2"
6"
8"
10"
14"
Min.
Combustible
Material
Non-Combustible Material
Minimum Non-
Combustible
Material 8"
Min. 12" 15" 18"
All minimum
distances are
in inches
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
MANTEL CLEARANCES
In addition to meeting noncombustible material clearances, you must
also meet required clearances between fireplace opening and mantel
shelf.Ifyoudonotmeettheclearanceslistedbelow,youwillneedahood.
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
If minimum clearances in Figure 6 are not met, you must have
a hood. When using a hood there are still certain minimum
mantel clearances required. Follow minimum clearances shown
in Figure 7 when using hood.
NOTICE:Surface temperatures of adjacent 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.
NOTICE:Ifyourinstallationdoesnotmeettheminimum
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).
Figure 6 - Minimum Mantel Clearances Without Using Hood
Figure8-MinimumFireplace
Clearances If Installed at
Floor Level
Figure 9 - Minimum Fireplace
Clearances Above
Combustible Flooring
Figure 7 - Minimum Mantel Clearances When Using Hood
Noncombustible
Material
Hood
(GA6050, GA6052,
or GA6053)
Hearth
5"
Min.
Combustible
Material
INSTALLATION
Mantel Clearances
Floor Clearances

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11
11
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,page44).Thiswillinsurevented
operation(seeFigure 10).Thedamperclampwillkeepdamper 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.
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
Chimney Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
INSTALLATION
Continued
INSTALLING HEATER BASE ASSEMBLY
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 or log
misplacement.
WARNING: If installing in a sunken fireplace,
special care is needed. You must raise the fireplace
floor to allow access to heater control panel. This
will insure adequate air flow and guard against
sooting and controls being damaged. Raise fire-
placefloorwithnoncombustiblematerial.Makesure
material is secure.
CAUTION: Donot pickup heaterbase assemblyby
burners. This could damage heater. Only handle base
assembly 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, page 27.
Installation Items Needed
• hardware package (provided with heater)
• approvedflexible gas hose and fittings (not provided) (if allowed
by local codes)
• sealant (resistant to propane/LP gas, not provided)
• electric drill with 3/16" drill bit (metal or masonry as applicable)
• flathead screwdriver
• pipe wrench
1. Apply pipe joint sealant lightly to male threads of gas fitting
(not provided). For Variable Manually-Controlled and Ther-
mostat-Controlled Models connect approved flexible gas hose
to gas regulator of heater (see Figure 11, page 12). For Re-
mote-Ready models connect approved flexible gas hose to gas
control fitting in heater (see Figure 12, page 12).
IMPORTANT: Hold gas regulator with wrench when connect-
ing flexible gas hose (Variable Manually-Controlled and Ther-
mostat-Controlled Models Only). Hold gas fitting with wrench
whenconnectingflexible gashose(Remote-ReadyModelsOnly).
2. Locate two masonry screws in hardware package.
3. Place heater base in fireplace.
Figure 10 - Attaching Damper Clamp
Damper
Damper Clamp
Damper
Manufactured Fireplace
Masonry Fireplace
Damper Clamp
Damper
INSTALLATION
Installing Damper Clamp Accessory for Vented Operation
Installing Heater Base Assembly

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INSTALLATION
Continued
Heater Gas
Regulator
Flexible Gas Hose (if
allowed by local codes)
Figure 11 - Attaching Flexible Gas Hose to Heater Gas
Regulator (Variable Manually-Controlled and Thermostat-
Controlled Models Only)
Figure13-AttachingHeatertoFireplaceFloor(VariableManually-
Controlled and Thermostat-Controlled Models Only)
Masonry
Screw
Bracket with
Screw Holes
Figure 12 - Attaching Flexible Gas Hose to Heater (Remote-
Ready Models Only)
Figure 14 - Attaching Base to Fireplace Floor (Remote-Ready
Models Only)
4. Place logs in their proper position on heater base (see Installing
Logs, pages 15 and 16).
5. Center heater base and logs front-to-back and side-to-side in
fireplace.
6. Carefully remove logs without moving heater base.
7. Mark screw locations through one hole on each side of the
mounting bracket (see Figures 13, 14 or 15, depending on your
model). If installing in a brick-bottom fireplace, mark screw
locations in mortar joint of bricks.
8. Remove heater base from fireplace. If installing optional con-
trol accessories, do so at this time (Remote-Ready Models
Only). Follow all directions provided with accessory.
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).
INSTALLATION
Installing Heater Base Assembly (Cont.)
Fitting
Flexible Gas
Hose (if allowed
by local codes)
VINTAGE OAK LOG CHASSIS
(VariableManually-Controlledand
Thermostat-Controlled Models)
Fitting
Figure 15 - Attaching Base Assembly to Fireplace Floor
Bracket with
Screw Holes
Bracket with
Screw Holes
Masonry
Screw
Masonry
Screw
GOLDEN OAK AND
BIRCH MODEL CHASSIS
(VariableManually-Controlledand
Thermostat-Controlled Models)
GOLDEN OAK AND
BIRCH MODEL CHASSIS
(Remote-Ready Models)

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13
Propane/LP
Supply Tank
External Regulator
CONNECTING TO GAS SUPPLY
WARNING: This appliance requires a 1/2" NPT
(National Pipe Thread) inlet connection to the pres-
sure regulator.
WARNING: A qualified service person must con-
nect heater to gas supply. Follow all local codes.
CAUTION: Never connect propane/LP fireplace
directlytothepropane/LPsupply.Thisheaterrequires
anexternalregulator(notsupplied).Installtheexternal
regulator between the heater and propane/LP supply.
WARNING:Neverconnectnaturalgasfireplaceto
private (non-utility) gas wells. This gas is commonly
known as wellhead gas.
Installation Items Needed
Beforeinstallingheater,makesureyouhavetheitemslistedbelow.
• 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 44.
For propane/LP units, the installer must supply an external regula-
tor. The external regulator will reduce incoming gas pressure. You
must reduce incoming gas pressure to between 11 and 14 inches of
water. If you do not reduce incoming gas pressure, heater regulator
damage could occur. Install external regulator with the vent point-
ing down as shown in Figure 16. Pointing the vent down protects it
from freezing rain or sleet.
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.
INSTALLATION
Continued
Figure 16 - External Regulator With Vent Pointing Down
Vent Pointing Down
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 Figures 17 or
18 page 14, depending on your model).
IMPORTANT: Install equipment shutoff valve in an accessible
location. The equipment shutoff valve is for turning on or shutting
off the 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.
WARNING: Use pipe joint sealant that is resistant
to liquid petroleum (LP) gas.
We recommend that you install a sediment trap in supply line as
shown in Figures 17 or 18 page 14, depending on your model.
Locatesediment trap whereit is withinreach for cleaning.Install in
pipingsystembetweenfuelsupplyandheater.Locatesedimenttrap
where trapped matter is not likely to freeze. A sediment trap traps
moistureandcontaminants.Thiskeeps them from going intoheater
controls.Ifsedimenttrapisnotinstalledorisinstalledwrong,heater
may not run properly.
CAUTION: Avoid damage to regulator. Hold gas
regulator with wrench when connecting it to gas
piping and/or fittings (Variable Manually-Controlled
and Thermostat-Controlled Models Only).
CAUTION:Avoiddamagetogascontrol.Holdgas
fitting with wrench when connecting it to gas piping
and/or fittings (Remote-Ready Models Only).
INSTALLATION
Connecting To Gas Supply

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INSTALLATION
Continued
Figure 17 - Gas Connection (Variable Manually-Controlled and
Thermostat-Controlled Models Only)
* Purchase the optional CSA design-certified equipment shutoff valve
from your dealer. See Accessories, page 44.
** Minimum inlet pressure for purpose of input adjustment.
Figure 18 - Gas Connection (Remote-Ready Models Only)
Gas Control
Tee Cap Pipe
Joint Nipple
3" Minimum
Gas Regulator
PROPANE/LP
From External
Regulator
(11" W.C.**
to 14" W.C.
Pressure)
CSA Design-Certified Equipment
Shutoff Valve With 1/8" NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
Sediment Trap
NATURAL
From Gas
Meter
(5" W.C.**
to 10.5" W.C.
Pressure)
Pipe Cap Tee
Nipple Joint
3" Minimum
Sediment Trap
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)
CSA Design-Certified Equipment
Shutoff Valve With 1/8" NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
WARNING: Test all gas piping and connections,
internal and externalto unit, for leaks after installing
or servicing. Correct all leaks at once.
WARNING: Never use an open flame to check for
aleak.Applyanoncorrosiveleakdetectionfluidtoall
joints.Bubblesformingshowaleak.Correctallleaks
at once.
CAUTION: Makesureexternal regulatorhasbeen
installedbetweenpropane/LPsupplyandheater.See
guidelinesunder ConnectingtoGasSupply ,page13.
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 sys-
tem.Pressuresin excess of 1/2psigwill 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 supply tank valve for propane/LP gas or opening
main gas valve located on or near gas meter for natural gas, or
using compressed air.
4. Check all joints of gas supply piping system.Apply 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 fittings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 19, page 15).
2. Pressurizesupplypipingsystembyeitheropeningpropane/LPsup-
ply tank valve for propane/LP gas or opening main gas valve lo-
catedonor near gasmeter for naturalgas,or using compressedair.
3. Check all joints from gas meter to equipment shutoff valve for
natural gas or propane/LP supply to equipment shutoff valve
for propane/LP (see Figures 20 and 21, page 15). Apply non-
corrosive leak detection fluid to all joints. Bubbles forming
show a leak.
4. Correct all leaks at once.
CHECKING GAS CONNECTIONS
INSTALLATION
Connecting to Gas Supply (Cont.)
Checking Gas Connections

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15
INSTALLATION
Continued
Figure 19 - Equipment Shutoff Valve
Figure 20 - Checking Gas Joints (Propane/LP Model Shown)
Thermostat Gas
Valve or Control
Valve Location
Propane/LP
Supply Tank
Equipment
Shutoff Valve
ON
POSITION
OFF
POSITION
Open
Closed
Equipment
Shutoff
Valve
Figure 21 - Checking Gas Joints (Natural Gas Only)
INSTALLING LOGS
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,check to ensure that noflamecomesincontact
withanylog.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.
It is very important to install the logs exactly as instructed. Do not
modify logs. Only use logs supplied with heater.
1. Place one-piece log set on grate to fit as illustrated in Figure 22
on page 16 for Vintage Oak models and Figure 23 on page 16
for Golden Oak or Birchmodels. ForVintage Oak models make
sure bottom of front log is in front of “U”-shaped cutout in
center of chassis (see Figure 22, page 16). For Golden Oak or
Birch models make sure middle section at bottom of log set is
seated into “U”-shaped cutout in center of chassis (see Figure
23, page 16). Note: 36" and birch models have more features
but fit on the chassis the same. Log will fit securely on chassis.
IMPORTANT: Make sure log does not cover any burner ports
(see Figures 24 or 25, page 16).
2. Place lava rock around base of heater if desired.
INSTALLATION
Checking Gas Connections (Cont.)
Installing Logs
Pressure Testing Heater Gas Connections
1. Open equipment shutoff valve (see Figure 19).
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 equipment shutoff valve to thermostat
gas valve (Thermostat-Controlled Models), to control valve
(Manually-Controlled Models), or to gas control (Remote-
Ready Models)(see Figures 20 and 21). 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 17 through 22, de-
pendingonyour model). Checkall other internaljointsfor leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 18 for
Thermostat-Controlledmodels,page19forManually-Controlled
Models, or page 21 for Remote-Ready Models).
Gas Meter
Thermostat Gas
Valve or Control
Valve Location
Equipment
Shutoff Valve

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INSTALLATION
Continued
INSTALLATION
Installing Logs (Cont.)
Figure 22 - Installing Vintage Oak One-Piece Log Set Figure24- InstallingVintageOakOne-PieceLogSet(Top View)
One Piece
Log Set
Burner Ports
Figure 25 - Installing Golden Oak or Birch One-Piece Log Set
(Top View)
Figure 23 - Installing Golden Oak or Birch One-Piece Log Set
One-Piece
Log Set
Chassis
Burner
“U”-shaped Cutout
in Chassis
Middle Section
at Bottom of
Log Set
One-Piece
Log Set
Chassis
Burner
“U”-shaped Cutout
in Chassis
One Piece
Log Set
Burner Ports

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17
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. Useonlyyourhandto push in or turnthe gas controlknob.
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
LIGHTING
INSTRUCTIONS
Figure 26 - Control Knob and
Ignitor Button Location
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-
placewillcauseglasstoburst.Makesurethereare
no obstructions across opening of fireplace.
•Youmustoperatethisheaterwithafireplacescreen
in place. Make sure fireplace screen is closed
before running heater.
NOTICE:Duringinitialoperationofnewheater,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:Damperhandlewillbehotifheaterhas
been running.
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.
5. Turn control knob counterclockwise
C-clockwise
to the PI-
LOT position. Press in control knob for five (5) seconds
(see Figure 26).
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,
lightpilot withmatch.Tolight pilot withmatch,see Manual
Lighting Procedure on page 18.
7. Keep control knob pressed in for 30 seconds after lighting
pilot. After 30 seconds, release control knob.
Note: If pilotgoes out,repeatsteps 3through7.Thisheater
has a safety interlock system. Wait one (1) minute for sys-
tem to reset before lighting pilot again.
8. Turn control knob counterclockwise to desired
heating level.The burners should light. Set control knob to
any heat level between HI and LO.
Figure 27 - Pilot
THERMOSTAT-CONTROLLED MODELS
OPERATING HEATER (THERMOSTAT-CONTROLLED MODELS)
For Your Safety Read Before Lighting
Lighting Instructions
LO
HI
OFF
Pilot
Control
Knob
Ignitor
Button
Ignitor
Electrode
ThermocouplePilot
Burner
( Note: Appearance of pilot
assembly may vary by model.)

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TO TURN OFF GAS
TO APPLIANCE
1. Followsteps1 through5underLightingInstructions,page17.
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, page 17.
CAUTION: Do not try to adjust heating levels by
using the equipment shutoff valve.
OPERATING HEATER
Continued
Shutting Off Heater
Turn control knob clockwise to the OFF position.
Shutting Off Burners Only (pilot stays lit)
Turn control knob 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 willgradually modulate the
heat output and flame height from higher to lower settings, or
pilot, in order to maintain the comfort level you select. The ideal
comfortsettingwillvarybyhouseholddependingupontheamount
ofspacetobeheated,theoutputofthecentralheatingsystem,etc.
Note: SelectingtheHIsettingwiththecontrolknobwillcausethe
burnertoremainfullyon,withoutmodulatingdowninmostcases.
MANUAL LIGHTING
PROCEDURE
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.
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-
placewillcauseglasstoburst.Makesurefireplace
screen is closed before running heater.
•Youmustoperatethisheaterwithafireplacescreen
in place. Make sure fireplace screen is closed
before running heater.
NOTICE:Duringinitialoperationofnewheater,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:Damperhandlewillbehotifheaterhas
been running.
1. STOP! Read the safety information column 1 and 2.
2. Make sure equipment shutoff valve is fully open.
3. Press in and turn control knob clockwise to the
OFF position.
FOR YOUR SAFETY
READ BEFORE LIGHTING
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. Useonlyyourhandto push in or turn thegas controlknob.
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.
LIGHTING
INSTRUCTIONS
MANUALLY-CONTROLLED MODELS
OPERATING HEATER (THERMOSTAT-CONTROLLED MODELS)
To Turn Gas Off To Appliance
Thermostat Control Operation
Manual Lighting Procedure
OPERATING HEATER (MANUALLY-CONTROLLED MODELS)
For Your Safety Read Before Lighting
Lighting Instructions

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19
19
Thermocouple
Ignitor Electrode
Pilot
Burner
PILOT
OFF
LO
HI
Figure 28 - Control Knob and
Ignitor Button Location
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, starting in column 1, page 18.
If you don’t smell gas, go to the next step.
5. Slightly depress and turn control knob counterclockwise
to the PILOT position.Keepcontrolknob pressed
in for five (5) seconds (see Figure 28).
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. Withcontrolknobpressedin, pressand release ignitor but-
ton.Thiswill light pilot.Thepilot is attached to the burner.
If needed, keep pressing ignitor button until pilot lights.
Note: If pilot does not light, contact a qualified service
person or gas supplier for repairs. Until repairs are made,
lightpilot withmatch.Tolight pilot withmatch, seeManual
Lighting Procedure, column 2.
7. Keep control knob pressed in for 30 seconds after lighting
pilot. After 30 seconds, release control knob.
• If control knob does not pop out when released, contact
a qualified service person or gas supplier for repairs.
Note: If pilot goes out, repeat steps 3 through 7.
8. Slightly depress and turn control knob counterclockwise
C-clockwise
to the HI position. The burner should light. Set
control knob to any heat level between HI and LO.
OPERATING HEATER
Continued
VARIABLE CONTROL
OPERATION
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.
WARNING:Donotoperate heater betweenPILOT
and HI positions.
CAUTION: Do not try to adjust heating levels by
using the equipment shutoff valve.
Figure 29- Pilot
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Press in and turn control knob clockwise
Clockwise
to the
HI position.
2. Turn the 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. Turn the control knob clockwise
Clockwise
to the HI position.
2. Press in and turn control knob clockwise
Clockwise
to the
PILOT position.
1. Follow steps1 through5 underLighting Instructions, pages
18 and 19.
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, column 1.
MANUAL LIGHTING
PROCEDURE
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
REMOTE-READY MODELS
OPERATING HEATER (MANUALLY-CONTROLLED MODELS)
Lighting Instructions (Cont.)
Variable Control Operation
To Turn Gas Off To Appliance
Manual Lighting Procedure
OPERATING HEATER (REMOTE-READY MODELS)
For Your Safety Read Before Lighting
( Note: Appearance of pilot
assembly may vary by model.)
Control Knob
Ignitor Button

107070-01F
For more information, visit www.desatech.com
For more information, visit www.desatech.com
20
C. Useonlyyourhandto push in or turn thegas controlknob.
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.
1. STOP! Read the safety information, starting in column 2,
page 19.
2. Make sure equipment shutoff valve is fully open.
3. Set selector switch in the OFF position.
WARNING: Burners will come on automatically
within one minute when the selector switch is in the
ON position after the pilot is lit.
LIGHTING
INSTRUCTIONS
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-
placewillcauseglasstoburst.Makesurefireplace
screen is closed before running heater.
•Youmustoperatethisheaterwithafireplacescreen
in place. Make sure fireplace screen is closed
before running heater.
NOTICE:Duringinitialoperationofnewheater,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.
Figure30-ControlKnobandIgnitorButtonLocation(Shownas
Supplied, No Control Options)
OPERATING HEATER
Continued
Flame Adjustment Knob
O
F
F
P
I
L
O
T
O
N
L
O
I
H
AUTO
OFF
ON
Control Knob
Ignitor Button Selector Switch in OFF Position
OPERATING HEATER (REMOTE-READY MODELS)
For Your Safety Read Before Lighting (Cont.)
Lighting Instructions
4. Press in and turn control knob clockwise to the
OFF position (see Figure 30).
5. 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, starting in column 2,
page 19. If you don’t smell gas, go to the next step.
6. Press in and turn control knob counterclockwise
to the PILOT position. Press in control knob for five (5)
seconds (see Figure 30).
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.
7. With control knob pressed in, press and release ignitor
button.Thiswilllightpilot.The pilot isattachedtothe front
burner. If needed, keep pressing ignitor button until pilot
lights.
Note: If pilot does not stay lit, contact a qualified service
person or gas supplier for repairs. Until repairs are made,
lightpilot withmatch.Tolight pilot withmatch, seeManual
Lighting Procedure, page 21.
8. Keep control knob pressed in for 30 seconds after lighting
pilot. After 30 seconds, release control knob.
• If control knob does not pop out when released, contact
a qualified service person or gas supplier for repairs.
Note: If pilot goes out, repeat steps 4 through 8, page 19.
9. Slightly push in and turn control knob counterclockwise
to the ON position.
10. Wait one minute and switchselector switch to the ON posi-
tion to light burners. Note: AUTO is only functional when
using GWMT1 or GWMS2 optional accessories.
11. Set flame adjustment knob to any level between HI and LO.