Desa Comfort Glow CGB3924NRA Quick start guide

Save this manual for future reference.
WARNING: Improper installation, ad-
justment,alteration,service,ormainte-
nancecancauseinjuryorpropertydam-
age. Refer to this manual for correct
installationandoperationalprocedures.
For assistance or additional informa-
tion consult a qualified installer, ser-
vice agency, or the gas supplier.
WARNING:Thisapplianceisfor instal-
lation only in a solid-fuel burning ma-
sonry or UL127 factory-built fireplace,
orinanapprovedventlessfirebox.Itis
design-certifiedfortheseinstallations
in accordance with ANS Z21.11.2.
Exception: Do not install this appli-
ance in a factory-built fireplace that
includesinstructionsstatingithasnot
beentestedorshouldnotbeusedwith
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.Referto AirforCombustionandVentilation sectiononpage4ofthismanual.
®
PREMIUM AGED SPLIT OAK AND
YELLOW FLAME UNVENTED (VENT-FREE)
NATURAL GAS LOG HEATERS
CGD3924NRA
CGB3924NRA
CGB3930NRA
24" and 30"
Remote Ready
P
I
L
O
T
O
F
F
O
N
LO
REMOTE
OFF
HI
Also Design-Certified As Vented Decorative Appliances When
Not Used With Hand-Held Thermostat Remote
OWNER’S OPERATION AND INSTALLATION MANUAL
WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result causing property
damage, personal injury, or loss of life.
— Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Donot touchany electricalswitch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
— Installation and service must be per-
formed by a qualified installer, ser-
vice agency, or the gas supplier.
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not
prohibited by state or local codes.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer.
(Yellow Flame Model Shown)
Patent Pending

2
105677
UNVENTED NATURAL GAS LOG HEATER
SAFETY
INFORMATION
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning re-
semble the flu, with headaches, dizziness,
ornausea.Ifyouhavethesesigns,theheater
maynotbeworkingproperly.Getfreshair
atonce!Haveheaterserviced.Somepeople
are more affected by carbon monoxide than
others. These include pregnant women,
peoplewithheartorlung diseaseoranemia,
those under the influence of alcohol, and
those at high altitudes.
Natural Gas: Natural gas is odorless. An
odor-making agent is added to the gas. The
odor helps you detect a gas leak. However,
theodor addedtothe gascanfade. 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, oper-
ate, or service this heater. Im-
proper use of this heater can
causeseriousinjuryordeathfrom
burns, fire, explosion, electrical
shock, and carbon monoxide
poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
WARNING: Any change to
this heater or its controls can be
dangerous.
1. This appliance is only for use with the
typeof gas indicatedonthe rating plate.
Thisappliance is notconvertiblefor use
with other gases.
2. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do
not use any phone in your building
• immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions
• ifyou cannot reachyour gas supplier,
call the fire department
3. This heater shall not be installed in a
bedroom or bathroom unless installed
as a vented appliance (see Installing
Damper Clamp Accessory, page 10).
4. Never install the heater
• in a recreational vehicle
• wherecurtains, furniture, clothing,or
otherflammable objectsareless than
42inches fromthefront, top,orsides
of the heater
• in high traffic areas
• in windy or drafty areas
5. Before installing in a solid fuel burn-
ingfireplace, thechimneyflue and fire-
box must be cleaned of soot, creosote,
ashes and loose paint by a qualified
chimney cleaner. Creosote will ignite
if highly heated. Inspect chimney flue
for damage. If damaged, operate heater
with flue damper closed.
6. If fireplace has glass doors, never op-
eratethis heater with glassdoorsclosed.
Ifyou operateheaterwith doorsclosed,
heat buildup inside fireplace will cause
glass to burst. Also if fireplace open-
ing has vents at the bottom, you must
open the vents before operating heater.
7. You must operate this heater with a fire-
placescreeninplace.Makesurefireplace
screen is closed before running heater.
8. This log heater is designed to be smoke-
less. If logs ever appear to smoke, turn
offheaterandcall a qualifiedserviceper-
son. Note: Duringinitialoperation,slight
smokingmayoccurduetolog curingand
heater burning manufacturing residues.
9. To prevent the creation of soot, follow
the instructions in Cleaning and Main-
tenance, page 18.
10. Donotallowfanstoblowdirectlyintothe
fireplace.Avoidanydraftsthatalterburner
flame patterns. Ceiling fans may create
drafts that alter burner flame patterns.Al-
tered burner patterns can cause sooting.
11. Beforeusingfurniture polish, wax,car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
these products may create a white resi-
due within burner box or on adjacent
walls or furniture.
12. Do not use a blower insert, heat ex-
changer insert or other accessory not
approved for use with this heater.
13. This heaterneedsfresh, outside airven-
tilation to run properly. This heater has
an oxygen depletion sensor (ODS) pi-
lot light safety system. The ODS shuts
down the heater if not enough fresh air
is available. See Air for Combustion
and Ventilation, pages 4 through 6. If
heater keeps shutting off, see Trouble-
shooting, pages 19 through 21.
14. Do not run heater
• where flammable liquids or vapors
are used or stored
• under dusty conditions
15. Do not use this heater to cook food or
burn paper or other objects.
16. Never place any objects on the heater.
17. Heater baseassemblybecomesvery hot
whenrunning heater. Keepchildrenand
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.
18. Carefully supervise young children
when they are in the room with heater.
When using the hand-held remote ac-
cessory, keep selector switch in the
OFF position to prevent children from
turning on burners with hand-held re-
mote control unit.
19. Do not use heater if any part has been
exposed to or under water. Immediately
call a qualified service technician to in-
spectthe room heaterandtoreplace any
part of the control system and any gas
control which has been under water.
20. Do not operate heater if any log is bro-
ken. Do not operate heater if a log is
chipped (dime-sized or larger).
21. Turn heater off and let cool before ser-
vicing,installing,orrepairing.Makesure
the remote selector switch is in the OFF
position. Only a qualified service person
should install, service, or repair heater.
22. Make sure the remote selector switch is
in the OFF position when you are away
from home for long periods of time.
23. This heater must not be connected to
any external electrical source.
24. Operating heater above elevations of
4,500 feet may cause pilot outage.

3
105677
OWNER’S MANUAL
AUTO
MAN
OFF
STATUS
ONLO
HI
TEMP
PRODUCT
IDENTIFICATION
Figure 1 - Yellow Flame Vent-Free Gas Log Heater Shown (Logs May Vary by Model)
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
realisticdancing,yellowflames.Thisheater
isdesignedforvent-freeoperationwithflue
damper closed. It has been tested and ap-
proved to ANS Z21.11.2 standard for
unvented heaters. State and local codes in
some areas prohibit the use of vent-free
heaters.Thisheatermayalsobeoperated as
a vented decorative (ANS Z21.60) product
by opening flue damper (non-thermostat
models only).
SAFETY PILOT
This heater has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
TheODS/pilotisarequiredfeatureforvent-
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.
1. Remove logs and heater base assem-
bly from carton. Note: Do not pick up
heater base assembly by burners. This
could damage heater. Always handle
base assembly by grate.
2. Remove all protective packaging ap-
plied to logs and heater for shipment.
3. Check all items for any shipping dam-
age. If damaged, promptly inform
dealer where you bought heater.
UNPACKING
PRODUCT
FEATURES
Optional
Remote
Control
Front Log
Control Knob
Back Log
Base Grate
Burner
Piezo Ignitor
Crossover Log
Middle Log
Optional Selector Switch
Flame Adjustment Knob
LOCAL CODES
Install and use heater with care. Follow all
localcodes.Intheabsenceoflocalcodes,use
the latest edition of The National Fuel Gas
Code ANS Z223, also known as NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Note: Where listed vented decorative logs
are required, thermostat operation is not
permitted.
REMOTE CONTROL
ACCESSORIES
There are two optional remote controls that
can be purchased separately for this log
heater:
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 27.
The hand-held thermostat may not be used
where vented decorative listing is required.
CAUTION: Donot removethe
metal data plates attached to the
heater base assembly. The data
platescontainimportantwarranty
information.

4
105677
UNVENTED NATURAL GAS LOG HEATER
AIR FOR
COMBUSTION AND
VENTILATION
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weatherstripandcaulkaroundwindowsand
doorstokeepthecoldairoutandthewarmair
in. During heating months, home owners
want their homes as airtight as possible.
While it is good to make your home energy
efficient,yourhomeneedstobreathe.Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
Exhaustfans,fireplaces,clothesdryers,and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air for these appliances. This
will insure proper venting of vented fuel-
burning appliances.
WARNING: This heater shall
notbeinstalledinaconfinedspace
or unusually tight construction
unless provisions are provided
foradequatecombustionandven-
tilation air. Read the following in-
structions 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. NFPA 54/ANS Z223.1, Sec-
tion5.3,AirforCombustionandVentilation.
Allspacesinhomesfallintooneofthethree
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 win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusually tight construction is de-
fined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6 x 10-11 kg
per pa-sec-m2) or less with open-
ings gasketed or sealed and
b. weather stripping has been
added on openable windows and
doors and
c. caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors,be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tionsforplumbing,electrical,and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors , page 6.
If your home does not meet all of the
three criteria above, proceed to De-
termining Fresh-Air Flow For Heater
Location , page 5.
Confined Space and Unconfined
Space
TheNationalFuelGasCode(ANSZ2123.1,
1992 Section 5.3) defines a confined space
as a space whose volume is less than 50
cubicfeetper1,000Btuperhour(4.8m3per
kw) of the aggregate input rating of all
appliances installed in that space and an
unconfined space as a space whose volume
is not less than 50 cubic feet per 1,000 Btu
per hour (4.8 m3per kw) of the aggregate
inputratingofallappliancesinstalledinthat
space.Roomscommunicatingdirectly with
the space in which the appliances are in-
stalled*, through openings not furnished
with doors, are considered a part of the
unconfined space.
This heater shall not be installed in a con-
fined space or unusually tight construction
unlessprovisions are providedforadequate
combustion and ventilation air.
*Adjoiningroomsarecommunicatingonly
iftherearedoorlesspassagewaysorventila-
tion grills between them.

5
105677
OWNER’S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this work sheet to determine if you have a confined or unconfined space.
Space:Includestheroominwhichyouwillinstallheaterplusanyadjoiningroomswithdoorlesspassagewaysorventilationgrillsbetween
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)
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of
the space.
2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
_________________ (volume of space) ÷50 cu. ft. = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) ÷50 cu. ft. = 51.2 or 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 combustion air from the outdoors and vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
_________________ Btu/Hr (maximum the space can support)
_________________ Btu/Hr (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space can support)
79,000 Btu/Hr (actual amount of Btu/Hr used)
ThespaceintheaboveexampleisaconfinedspacebecausetheactualBtu/HrusedismorethanthemaximumBtu/Hrthespacecansupport.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
Example:
Gas water heater 40,000 Btu/Hr
Vent-free heater + 39,000 Btu/Hr
Total = 79,000 Btu/Hr
WARNING:Iftheareainwhichtheheatermaybeoperatedissmallerthanthatdefinedasanunconfinedspace
or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of
the methods described in the National Fuel Gas Code, ANS Z223.1, 1992, Section 5.3 or applicable local codes.
Continued

6
105677
UNVENTED NATURAL GAS LOG HEATER
AIR FOR
COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside
Building
Thisfreshairwouldcomefromanadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(seeoptions1and2,Figure2).Youcanalso
remove door into adjoining room (see op-
tion 3, Figure 2). Follow the National Fuel
Gas Code NFPA 54/ANS Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
Figure 3 - Ventilation Air from Outdoors
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connecttheseitemsdirectlytotheoutdoors
orspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces.
IMPORTANT: Donot provide openings for
inlet or outlet air into attic if attic has a
thermostat-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.
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"
WARNING: Rework work-
sheet, adding the space of the
adjoiningunconfinedspace.The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.

7
105677
OWNER’S MANUAL
INSTALLATION
WARNING: A qualified ser-
vice person must install heater.
Follow all local codes.
WARNING: Before installing
in a solid fuel burning fireplace,
thechimneyflueandfireboxmust
be cleaned of soot, creosote,
ashes and loose paint by a quali-
fied chimney cleaner. Creosote
willigniteifhighlyheated.Adirty
chimneyfluemaycreateanddis-
tribute soot within the house. In-
spectchimneyfluefordamage.If
damaged,operateheaterwithflue
damper closed.
WARNING: Seal any fresh air
vents or ash clean-out doors lo-
catedonfloororwalloffireplace.
If not, drafting may cause pilot
outage or sooting. Use a heat-
resistant sealant. Do not seal
chimney flue damper.
WARNING: Never install the
heater
• in a bedroom or bathroom un-
less installed as a vented ap-
pliance, see page 10.
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objectsarelessthan42inches
from the front, top, or sides of
the heater
• in high traffic areas
• in windy or drafty areas
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as to-
bacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls.
IMPORTANT: Vent-freeheatersaddmois-
ture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilation air may cause mildew to form
from too much moisture. See Air for Com-
bustion and Ventilation, pages 4 through 6.
CHECK GAS TYPE
Use only natural gas. If your gas supply is
not natural gas, do not install heater. Call
dealer where you bought heater for proper
type heater.
NOTICE:Stateorlocalcodesmay
onlyallowoperationofthisappli-
ance in a vented configuration.
Check your state or local codes.
WARNING: Make sure the se-
lector switch is in the OFF posi-
tion before installing heater.
NOTICE: This heater is intended
foruseassupplementalheat.Use
this heater along with your pri-
mary heating system. Do not in-
stall this heater as your primary
heatsource. Ifyou havea central
heating system, you may run
system’scirculatingblowerwhile
usingheater.Thiswillhelpcircu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
INSTALLATION AND
CLEARANCES
(Vent-Free Operation Only)
WARNING:Maintainthemini-
mum clearances. If you can, pro-
vide greater clearances from
floor, ceiling, and adjoining wall.
*Measured at 13" depth
Carefullyfollowtheinstructionsbelow.This
will ensure safe installation into a masonry,
UL127-listed manufactured fireplace, or
listed vent-free firebox.
Minimum Wall and Ceiling
Clearances (see Figure 4)
A. Clearances from the side of the fire-
place opening to any combustible wall
should not be less than 16 inches.
B. Clearancesfrom thetopof thefireplace
openingto the ceilingshouldnot be less
than 42 inches.
Figure4-MinimumClearancetoWalland
Ceiling
Continued
LOG SIZING REQUIREMENTS
Minimum Firebox Size
Log Front Rear
Size Height Depth Width Width*
24" 17" 13" 28" 21"
30" 17" 13" 34" 24"
MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size Side Wall Ceiling
24" 16" 42"
42"
16"
Left and
Right
Sides

8
105677
UNVENTED NATURAL GAS LOG HEATER
INSTALLATION
Continued
Heat Resistant
Material (A)
Minimum Noncombustible
Material Clearances
If Not Using Mantel
Note: If using a mantel, go to If Using
Mantel. If not using a mantel, follow the
information below.
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheetmetal,youmust havenoncombustible
material behind it. Noncombustible mate-
rial must extend at least 8" up (for all mod-
els). If noncombustible material is less than
12", you must install the fireplace hood
accessory (24" and 30" models only). See
Figure 5 for minimum clearances.
IMPORTANT: If you cannot meet these
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.
Noncombustible Requirements for
Material Distance (A) Safe Installation
12" or more Noncombustible material okay.
Between 8" and 12" Install fireplace hood accessory (GA6050, GA6052,
or GA6053, see Accessories , page 27).
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.
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
NOTICE: Manual control heaters
maybeusedasaventedproduct.
Ifso, youmust alwaysrun heater
with chimney flue damper open.
If running heater with damper
open, noncombustible material
above fireplace opening is not
needed. Go to Installing Damper
Clamp Accessory for Vented
Operation , page 10.
If Using Mantel
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheetmetal,youmust havenoncombustible
material behind it. Noncombustible mate-
rial must extend at least 8 inches up (for all
models). If noncombustible material is less
than12",youmustinstallthefireplacehood
accessory (24" and 30" models 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 Installing Damper Clamp Accessory for
Vented Operation, page 10.

9
105677
OWNER’S MANUAL
INSTALLATION
Continued
Figure 6 - Minimum Mantel Clearances Without Using Hood
MANTEL CLEARANCES
Inadditiontomeetingnoncombustiblemate-
rial clearances, you must also meet required
clearances between fireplace opening and
mantel shelf. If you do not meet the clear-
ances listed below, you will need a hood.
Determining Minimum Mantel
Clearances
If you meet minimum clearance between
mantel shelf and top of fireplace opening, a
hood is not required (see Figure 6).
Determining Minimum Mantel
Clearances When Using a Hood
If minimum clearances in Figure 6 are not
met, you must have a hood. When using a
hoodtherearestillcertainminimummantel
clearancesrequired.Followminimumclear-
ances shown in Figure 7 when using hood.
Continued
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"
(A)
18" 20" 22" 24"
All minimum
distances are
in inches
2
1/2
"
6"
8"
10"
NOTICE:If yourinstallationdoes
notmeettheminimumclearances
shown, you must do one of the
following:
• operate the logs only with the
flue damper open
• raise the mantel to an accept-
able height
• remove the mantel
14"
Min.
Combustible
Material
Noncombustible Material
Hearth
5"
Min.
Combustible
Material
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
FLOOR CLEARANCES
A. If installing appliance on the floor level,
youmustmaintaintheminimumdistance
of 14" to combustibles (see Figure 8).
B. If combustible materials are less than
14" to the fireplace, you must install
applianceat least5"above thecombus-
tible flooring (see Figure 9).
Figure9-MinimumFireplaceClearances
Above Combustible Flooring
Figure 7 - Minimum Mantel Clearances When Using Hood
Figure8-MinimumFireplaceClearances
If Installed at Floor Level

10
105677
UNVENTED NATURAL GAS LOG HEATER
INSTALLATION
Continued
INSTALLING HEATER BASE
ASSEMBLY
IMPORTANT: Make sure the heater burn-
ersarelevel.Ifheaterisnotlevel,heaterwill
not work properly.
WARNING: If installing in a
sunken fireplace, special care is
needed. You must raise the fire-
place floor to allow access to
heater control panel. This will in-
sure adequate air flow and guard
against sooting. Raise fireplace
floor with noncombustible mate-
rial.Makesure materialis secure.
CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle base assem-
bly by grates.
WARNING: You must secure
this heater to fireplace floor. If
not, heater will move when you
adjust controls. Moving heater
may cause a gas leak.
Installation Items Needed
• hardwarepackage (providedwithheater)
• approvedflexible gas hose(notprovided)
(if allowed by local codes)
• sealant resistant to propane/LP gas, not
provided
• electric drill with 3/16" masonry drill bit
Note: Install optional remote receiver and
hand-held remote kit (see Accessories, page
27) before installing gas log heater. See in-
stallation instructions included with the kit.
1. Apply pipe joint sealant lightly to male
threads of the fitting to be threaded into
gas regulator. Connect approved flex-
ible gas hose to gas regulator of heater
(see Figure 11, page 11).
2. Locate masonry screws in hardware
package.
3. Position heater base assembly in fire-
place.
4. Mark screw locations through holes in
mounting flanges (see Figure 12, page
11). If installing in a brick-bottom fire-
place, mark screw locations in mortar
joint of bricks.
5. Remove heater base from fireplace.
6. Drill holes at marked locations using
3/16" masonry drill bit.
CAUTION: Donot removethe
metal data plates attached to the
heater base assembly. The data
platescontainimportantwarranty
information.
INSTALLING DAMPER
CLAMP ACCESSORY FOR
VENTED OPERATION
Note: When used as a vented heater, appli-
ance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of noncombustible material.
Ifyourheaterisamanuallycontrolledmodel,
youmayusethisheaterasa vented product.
There are three reasons for operating your
heater in the vented mode.
1. The fireplace does not meet the clear-
ance to combustibles requirements for
vent-free operation.
2. State or local codes do not permit vent-
free operation.
3. You prefer vented operation.
Ifreasonsnumber1or2aboveapplytoyou,
you must permanently open chimney flue
damper.Youmustinstallthedamperclamp
accessory (to order, see Accessories, page
27). This will insure vented operation (see
Figure 10). The damper clamp will keep
damper open. Installation instructions are
included with clamp accessory.
See chart below for minimum permanent
flue opening you must provide. Attach
damper clamp so the minimum permanent
flueopeningwillbemaintainedatall times.
Figure 10 - Attaching Damper Clamp
Damper
Clamp
Damper
Chimney Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
Area of Various Standard
Round Flues
Diameter (ins.) Area (sq. ins.)
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
Damper
Damper
Clamp
Damper
Manufactured Fireplace
Masonry Fireplace

11
105677
OWNER’S MANUAL
CAUTION: Avoid damage to
regulator.Holdgasregulatorwith
wrenchwhenconnectingittogas
piping and/or fittings.
INSTALLATION
Continued
Continued
CONNECTING TO GAS
SUPPLY
WARNING:Aqualifiedservice
person must connect heater to
gassupply.Followalllocalcodes.
Installation Items Needed
Beforeinstallingheater,makesureyouhave
the items listed below.
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* AnA.G.A.design-certifiedmanualshutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 27.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes.Usepipeof1/2"
diameter or greater to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
Installation must include a manual shutoff
valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
heater (see Figure 13).
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
fromgoing into pipe.Excesssealant in pipe
could result in clogged heater valves.
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
Installsedimenttrapinsupplylineasshown
in Figure 12. Locate sediment trap where it
is within reach for cleaning. Locate sedi-
menttrap wheretrappedmatter isnotlikely
to freeze. A sediment trap traps moisture
and contaminants. This keeps them from
going into heater controls. If sediment trap
is not installed or is installed wrong, heater
may not run properly.
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
Figure 13 - Gas Connection
* Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See
Accessories, page 27.
** Minimum inlet pressure for purpose of input adjustment.
Figure 11 - Attaching Flexible Gas Hose
to Heater
Figure 12 - Attaching Base Assembly to
Fireplace Floor
Flexible Gas Hose (if
allowed by local codes)
Fitting
Masonry Screw
Mounting
Flanges
7. Attach base assembly to fireplace floor
usingtwo masonry screws(inhardware
package) (see Figure 12).
8. Connect to gas supply. See Connect-
ing To Gas Supply.
Tee
Joint
Pipe
Nipple
Cap
3" Minimum Sedi-
ment
Trap
Gas
Control
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
A.G.A. Design-Certified
Manual Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible Gas Hose
(if allowed by local codes)

12
105677
UNVENTED NATURAL GAS LOG HEATER
INSTALLATION
Continued
Figure 14 - Manual Shutoff Valve
ON
POSITION
OFF
POSITION
Open
Manual
Shutoff
Valve
Figure 15 - Checking Gas Joints
Gas Meter
Manual
Shutoff
Valve
Thermostat Gas
Valve or Control
Valve Location
Closed
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
toalljoints.Bubblesformingshow
a leak. Correct all leaks at once.
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
CHECKING GAS
CONNECTIONS
Pressure Testing gas Supply
Piping system
TestPressuresInExcessOf1/2PSIG
1. Disconnect heater and its individual
manual shutoff valve from gas supply
piping system. Pressures in excess of
1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where
manual shutoff valve was connected.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Reconnect heater and manual shutoff
valve to gas supply. Check reconnected
fittings for leaks.
TestPressuresEqualToorLessThan
1/2 PSIG
1. Close manual shutoff valve (see Fig-
ure 14).
2. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
3. Checkalljointsfromgas metertomanual
shutoffvalve(seeFigure15).Applymix-
tureofliquidsoapandwatertogas joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Pressure Testing Heater Gas
Connections
1. Open manual shutoff valve (see Fig-
ure 14).
2. Open main gas valve located on or near
gas meter.
3. Make sure control knob of heater is in
the OFF position.
4. Check all joints from manual shutoff
valve to control valve (see Figure 15).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
pages 15 through 17). Check all other
internal joints for leaks.
7. Turn off heater (seeTo Turn Off Gas to
Appliance, page 16).
INSTALLING REMOTE RE-
CEIVER UNIT
1. Disconnect switch wires from the con-
trol valve.
2. Remove screws and nuts.
3. Remove switch plate (see Figure 16).
Discard after removing.
4. Install remote receiverunitonto gas log
heater base using clips (2) and insulat-
ing washers provided.
5. Push clips firmly into place (see Fig-
ure 17).
6. Connect wires as shown in Figure 18.
Figure 16 - Switch Plate and Wiring Har-
ness (Switch Plate and Orientation May
Vary Depending On Model)
Figure 17 - Installing Remote Receiver
Front
Back
Wires
Nut
Nut
Screw
Front
Bac
k
Insulating
Washers
Remote
Receiver
Mounting
Clips
Figure 18 - Connecting Wires
Valve
White
Wire From
Receiver
Red Wire From Receiver

13
105677
OWNER’S MANUAL
AUTO
OFF
ON
3
AUTO
OFF
ON
INSTALLATION
Continued
AUTO
OFF
ON
WARNING:Failureto position
thepartsinaccordancewiththese
diagrams or failure to use only
parts specifically approved with
this heater may result in property
damage or personal injury.
INSTALLING LOGS
(CGD3924NRA)
Each log is marked with a number. These
numbers will help you identify the log when
installing.It isveryimportant to installthese
logs exactly as instructed. Do not modify
logs. Only use logs supplied with heater.
1. Locatepegsonthebottomofbacklog(#1).
Slide these pegs into the holes in the grate
base behind the burner (see Figure 21).
2. Place the base of the middle log (#2) in
the U-shaped slots of the grate base in
front of the back log. The cutout on the
rightofthemiddle log should fitoverthe
burner (see Figure 22). Make sure the
front of the middle log is resting on the
tabs of the grate base and the cutout area
is centered over the burner “U” bend.
3. Locate the recesses on the back of the
frontlog(#3).Fit these recesses between
thepostsofthegratebase(seeFigure23).
Figure 21 - Installing Back Log (#1)
Figure 22 - Installing Middle Log (#2)
Figure 23 - Installing Front Log (#3)
Peg
Hole in
Grate Base
Back Log (#1)
Burner
Tab
U-Shaped
Slot
Middle Log (#2)
“U” Bend
Front Log (#3)
Recess
Post
Post
Burner
Cutout
Continued
CAUTION: After installation
andperiodicallythereafter,check
to ensure that no flame comes in
contact with any log. With the
heater set to HIGH, check to see
if flames contact any log. If so,
reposition logs according to the
loginstallationinstructionsinthis
manual. Flames contacting logs
will create soot.
INSTALLING WIRELESS
REMOTE CONTROL
ACCESSORY
Two9-volt alkaline batteries(notincluded)
are required to operate this heater with the
wireless hand held remote control set. One
battery must be installed in the receiver and
one in the hand-held remote control unit.
Note: Only use alkaline batteries.
Installing 9-Volt Battery in
Receiver
1. Locate back of receiver under front
burner of heater.
2. Locate the battery clip mounted on the
back of the receiver.
3. Slide a 9-volt battery through the clip.
4. Attach the terminalwires to thebattery.
Installing 9-Volt Battery (Not
Included) in Hand-Held Remote
Control Unit
1. Remove battery cover on back of re-
mote control unit.
2. Attach terminal wires to the battery.
Place battery into the battery housing.
3. Replace battery coveronto remote con-
trol unit.
Figure 19 - Installing Receiver on the
Back of the Base
Battery Clip
9-Volt Battery
Receiver
Terminal
Wires
Battery Cover
9-Volt
Battery
Terminal
Wires
Figure 20 - Installing Battery in Hand-
Held Remote Control Unit
Remote
Control
Unit
Battery Housing

14
105677
UNVENTED NATURAL GAS LOG HEATER
INSTALLING LOGS ON
MODELS CGB3924PRA AND
CGB3930PRA
WARNING:Failureto position
thepartsinaccordancewiththese
diagrams or failure to use only
parts specifically approved with
this heater may result in property
damage or personal injury.
INSTALLATION
Continued
AUTO
OFF
ON
Figure 25 - Installing Middle Log (#1)
Middle Log (#1)
Tab
Burner
“U” Bend
U-Shaped
Slot
AUTO
OFF
ON
Hole in
Grate Base
Back Log (#2)
Peg
Burner
Figure 26 - Installing Back Log (#2)
AUTO
OFF
ON
Crossover Log (#3)
Recess
Peg
Figure 27 - Installing Crossover Log (#3)
AUTO
OFF
ON
Front Log (#4)
Notches
Grate Fingers
Figure 28 - Installing Front Log (#4)
CAUTION: After installation
andperiodicallythereafter,check
to ensure that no flame comes in
contact with any log. With the
heater set to HIGH, check to see
if flames contact any log. If so,
reposition logs according to the
loginstallationinstructionsinthis
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 isveryimportant to installthese
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 bit over the burner (see Fig-
ure 25). Make sure the front of the
middle log is resting on the tabs of the
grate base and the cutout area is cen-
tered over the burner “U” bend.
2. Locatepegsonthebottomofbacklog(#2).
Slide these pegs into the holes in the grate
base behind the burner (see Figure 26).
3. Place cross-over log (#3) onto the pin
(right) on middle log (#1) and into the re-
cess of the back log (#2) (see Figure 27).
4. Locate the notches in the bottom of the
front log (#4). Place the front log on
thegrate fingers. Makesurethe notches
of the front log line up with the grate
fingers (see Figure 28).
5. With knot to right side, place smaller
log piece (#5) over the pin on the lift
side of the middle log. The smaller log
will rest on front log against the “knot”
on the left (see Figure 29, page 15).
6. Addlavarock around baseofheater. Do
notplaceanylavarockonlogsorburner.
Figure 24 - Installing Crossover Log (#4)
AUTO
OFF
ON
Crossover Log (#4)
Notches
Rectangular
Knobs
4. Locate the notches in the bottom of the
crossover log (#4). Place the crossover
log on top of the middle log and front
log.Make surethenotches ofthecross-
overlog lines up withrectangularknobs
on top of the middle and front logs (see
Figure 24).
5. Addlava rock around baseofheater.Do
notplaceanylavarockonlogsorburner.

15
105677
OWNER’S MANUAL
1. STOP! Read the safety information
in column 1.
2. Make sure manual shutoff valve is
fully open.
3. SetselectorswitchintheOFFposition.
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
A. Thisappliance hasapilotwhichmust
belightedbyhand.Whenlightingthe
pilot,followtheseinstructionsexactly.
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.
• Donottouchanyelectric switch;do
notuse anyphonein yourbuilding.
• Immediatelycallyourgas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
WARNING:
• If fireplace has glass doors,
never operate this heater with
glassdoorsclosed.Ifyouoper-
ate heater with doors closed,
heatbuildupinsidefireplacewill
cause glass to burst. Also if
fireplace opening has vents at
the bottom, you must open the
vents before operating heater.
• You must operate this heater
withafireplacescreeninplace.
Make sure fireplace screen is
closed before running heater.
NOTICE: During initial operation
of new heater, burning logs will
give off a paper-burning smell.
Orange flame will also be present.
Open damper or window to vent
smell.Thiswillonlylastafewhours.
OPERATING
HEATER
WARNING:Burnerswillcome
on automatically within one
minutewhen theremoteselector
switch is in the ON position after
the pilot is lit.
Continued
FOR YOUR SAFETY
READ BEFORE
LIGHTING
LIGHTING
INSTRUCTIONS
WARNING: Damper handle
will be hot if heater has been
running.
4. Pressinand turncontrolknob clock-
wise to the OFF position.
5. Wait five (5)minutesto clearout any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation, column 1. If you don’t
smell gas, go to the next step.
6. Pressinand turncontrolknobcoun-
terclockwise 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 hook-
ing up to gas supply. If so, the con-
trol knob may need to be pressed in
for 30 seconds or more. This will al-
low air to bleed from the gas system.
Figure 30 - Control Knob and Ignitor Button Location
O
F
F
P
I
L
O
T
O
N
L
O
I
H
REMOTE
OFF
ON
Control Knob
Ignitor Button Selector Switch in OFF Position
Flame Adjustment Knob
Figure 29 - Installing Log Piece (#5)
AUTO
OFF
ON
Log Piece (#5)
Peg
C. Useonly your handtopushin orturn
thegas controlknob.Never usetools.
If the knob will not push in or turn
by hand, don’t try to repair it, call a
qualified service technician 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 un-
der water.
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
Hiheatsettingbutwillfindtheheatoutput
excessive. You can open the chimney
damper(ifyouhaveone)fullyorpartially
to release some of the heat.
INSTALLATION
Continued

16
105677
UNVENTED NATURAL GAS LOG HEATER
TO TURN OFF GAS
TO APPLIANCE
1. Followsteps1through6under Light-
ing Instructions, page 15.
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 steps 9 through 11, column 1.
1. Afterlighting,let pilotflameburnfor
about one minute.Turn control knob
to ON position. Adjust flame adjust-
mentknobanywherebetweenHIand
LO. Slide the selector switch to the
REMOTE position. Note: The burn-
ersmaylight ifhand-heldremoteON
button was on when selector switch
was last turned off.You can now turn
theburnersonand offwith thehand-
held remote control unit.
IMPORTANT: Do not leave the se-
lector switch in the REMOTE posi-
tionwhen thepilotis notlit.Thiswill
drain the battery.
IMPORTANT: Be sure to press the
ON/OFF buttons on the hand-held
remote control unit for up to 3 sec-
onds to assure proper operation.
CGHRC Series Operation:
2a. PresstheON/OFF buttonto turn the
burners on and off. When turning
burners off, the pilot will remain lit.
CGHRCT Series Operation:
2b. Select the MAN (manual) or AUTO
button on the hand-held remote con-
trol unit (see Figure 33, page 17).
• In manual mode, turn burners on
or off by pressing the ON or OFF
buttons on the hand-held remote
control unit.
• Inautomode,theroomtemperature
iscontrolledbythethermostatinthe
hand-held remote control unit. To
increase the room temperature,
press the top arrow of the TEMP
button. To lower the room the tem-
perature, press the bottom arrow of
theTEMPbutton.Athighersettings
the heater will run more.
NOTICE: You must light the pilot
before using the hand-held re-
mote control unit. See Lighting
Instructions on page 15.
OPERATING
HEATER
Continued
Figure 31 - Pilot
CAUTION:Donottrytoadjust
heating levels by using the
manual shutoff valve.
WARNING: Make sure the se-
lectorswitchisintheOFFposition
when you are away from home for
long periods of time. Heater will
comeon automaticallywithselec-
tor switch in the ON position.
Shutting Off Heater
1. Turncontrolknob clockwise
to the OFF position.
2a. SetselectorswitchintheOFFposition.
2b. If Using Optional Hand-Held re-
mote: Set selector switch in the OFF
positiontokeepfromdrainingbattery.
Shutting Off Burners Only
(pilot stays lit)
You may shut off the burners and keep
thepilot litby doingoneof thefollowing:
1. Turncontrolknob clockwise
to the PILOT position.
2. UseremotecontrolmanualOFFbutton.
3. SetselectorswitchintheOFFposition.
Ignitor Electrode
Pilot Burner
MANUAL LIGHTING
PROCEDURE
OPTIONAL REMOTE
OPERATION
Note: Allremotecontrolaccessoriesmust
bepurchasedseparately(seeAccessories,
page 27). Follow instructions included
with the remote control.
Thermostat Control Operation
(Optional CGHRCT1 Only) The ther-
mostatcontrolsettingontheremotecon-
trol unit can be set to any comfort level
betweenHIandLO.Theburnerwillturn
on and off automatically to maintain the
comfort level you select. The ideal com-
fort setting will vary by household de-
pending upon the amount of space to be
heated, the output of the central heating
system, etc.
7. With control knob pressed in, press
and release ignitor button. This will
lightpilot.Thepilotis attachedtothe
front burner. If needed, keep press-
ing ignitor button until pilot lights.
Note: If pilot does not stay lit, con-
tact a qualified service person or gas
supplierforrepairs.Untilrepairsare
made,light pilotwithmatch.To light
pilot with match, see Manual Light-
ing Procedure.
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.
9. Slightly push in and turn control
knob counterclockwise to
the ON position.
10. Wait one minute and switch selector
switch to the ON position to light
burners.
11. Set flame adjustment knob to any
level between HI and LO.

17
105677
OWNER’S MANUAL
OPERATING
HEATER
Continued
TEMP
STATUS
HI
LO
MAN ON
AUTO OFF
Increases Room
Temperature
Decreases Room
Temperature
Turns Burners
On and Off
Shows Current
Operation Mode
Shows Temperature Setting
Figure 33 - Thermostat Hand-Held Remote Control Unit Selections
The Log Heater Will Automati-
cally Cycle Between Pilot and
the Heat Setting That Has Been
Selected.
Thermocouple
Pilot Burner
Figure 34 - Correct Pilot Flame Pattern
Figure 35 - Incorrect Pilot Flame Pattern
INSPECTING
BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure34showsacorrectpilotflamepattern.
Figure 35 shows an incorrect pilot flame
pattern.Theincorrectpilotflameisnottouch-
ing the thermocouple. This will cause the
thermocouple to cool. When the thermo-
couple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 35
• turn heater off (see To Turn Off Gas to
Appliance, page 16)
• seeTroubleshooting, pages19through21
Thermocouple
Pilot Burner
Allows Burners to be
Turned On and Off with the
Hand-Held Remote Unit.
Figure32-SettingtheSelectorSwitch,ControlKnob,andFlameAdjustmentKnobfor
Remote Operation
ON
OFF
REMOTE
O
F
F
P
I
L
O
T
O
N
L
O
I
H
Selector Switch in Remote Position
Control Knob in On Position
Flame Adjustment Knob
MAIN BURNER
Periodically inspect all burner flame holes
with the heater running. All slotted burner
flame holes should be open with yellow
flamepresent.Allroundburner flame holes
should be open with a small blue flame
present. Some burner flame holes may be-
come blocked by debris or rust, with no
flame present. If so, turn off heater and let
cool. Either remove blockage or replace
burner. Blocked burner flame holes will
create soot.
IMPORTANT: This remote control
has been specially engineered to take
an air temperature sample every 5.5
minutes in the auto mode. It will not
respond immediately to the tempera-
turesettingbeing turnedup ordown.
IMPORTANT: Thehand-heldremote
control unit must be near the heater.
Do not keep the hand-held remote
control unit too close to the heater.
The thermostat on the hand-held re-
mote control unit will heat up too
quickly and turn the heater off.
3. Usethe STATUS buttononthehand-
held remote control unit to see the
operation mode being used and the
temperature setting selected. A red
light will come on beside the opera-
tion mode being used when the sta-
tus button is pressed.
4. To turn the burners off when operat-
inginthemanualmode,presstheOFF
button. If operating in the auto mode,
press the MAN button, then press the
OFF button. The pilot will remain lit.
IMPORTANT: To turn the pilot off,
manuallyturnthecontrolknobonthe
heater to the OFF position.

18
105677
UNVENTED NATURAL GAS LOG HEATER
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heaterinspectedyearlybyaquali-
fied service person. Heater may
needmorefrequentcleaningdue
to excessive lint from carpeting,
pet hair, etc.
LOGS
• If you remove logs for cleaning, refer to
Installing Logs, pages 13 through 15, to
properly replace logs.
• Replace log(s) if broken or chipped
(dime-sized or larger).
MAIN BURNER
Periodically inspect all burner flame holes
with the heater running. All slotted burner
flame holes should be open with yellow
flamepresent.Allroundburner flame holes
should be open with a small blue flame
present. Some burner flame holes may be-
come blocked by debris or rust, with no
flame present. If so, turn off heater and let
cool. Either remove blockage or replace
burner. Blocked burner flame holes will
create soot.
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting.
If so, contact DESA International’s Techni-
calServiceDepartmentat1-800-DESALOG
(1-800-337-2564).
You can also visit DESA International’s
Technical Service web site at
www.desatech.com.
For information or questions concerning
hand-heldremoteorreceiver,contactTrack-
ing Technology at 1-800-301-0440 or
www.trackingtech.com.
When Gas Pressure Is Too Low
• pilot will not stay lit
• burners will have delayed ignition
• heater will not produce specified heat
When Gas Quality Is Bad
• pilot will not stay lit
• burners will produce flames and soot
• heater will backfire when lit
Youmayfeelyourgaspressureistoolowor
gas quality is bad. If so, contact your local
natural gas supplier.
SERVICE HINTS
CLEANING BURNER
INJECTOR HOLDER AND
PILOT AIR INLET HOLE
The primary air inlet holes allow the proper
amount of air to mix with the gas. This
provides a clean burning flame. Keep these
holesclearofdust,dirt,andlint.Cleanthese
air inlet holes prior to each heating season.
Blocked air holes will create soot. We rec-
ommendthatyoucleantheunitevery 2,500
hours of operation or every three months.
Wealsorecommendthatyoukeeptheburner
tube and pilot assembly clean and free of
dustanddirt.Tocleanthesepartswerecom-
mend using compressed air no greater than
30 PSI. Your local computer store, hard-
ware store, or home center may carry com-
pressed air in a can. You can use a vacuum
cleaner in the blow position. If using com-
pressed air in a can, please follow the direc-
tions on the can. If you don't follow direc-
tionsonthecan, youcoulddamagethepilot
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 36).
3. Blow air through the ports/slots and
holes in the burner.
Figure 36 - Injector Holder On Outlet
Burner Tube
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 air
inlet hole about two inches from where the
pilot flame comes out of the pilot assembly
(see Figure 37). With the unit off, lightly
blowair through theairinlethole. You may
blowthroughadrinkingstrawifcompressed
air is not available.
Burner
Tube
Injector Holder
(May Be Brass
or Aluminum
Depending on
Model)
Primary Air Inlet
Holes (Shape of
Holes May Vary
by Model)
Figure 37 - Pilot Inlet Air Hole
Burner
Tube
Pilot
Assembly
Pilot Air
Inlet
Hole
Ports/Slots

19
105677
OWNER’S MANUAL
Continued
TROUBLESHOOTING WARNING: Turn off heater
andletcoolbeforeservicing.Only
aqualifiedservicepersonshould
service and repair heater.
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot.ThiscandamageODS/
pilot unit.
POSSIBLE CAUSE
1. Ignitor electrode not connected to igni-
tor cable
2. Ignitor cable pinched or wet
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ignitor electrode broken
7. Ignitor electrode positioned wrong
1. Gas supply turned off or manual shutoff
valve closed
2. Control knob not in PILOT position
3. Control knob not pressed in while in
PILOT position
4. Air in gas lines when installed
5. ODS/pilot is clogged
6. Gas regulator setting is not correct
1. Control knob not fully pressed in
2. Control knob notpressedin longenough
3. Manual shutoff valve not fully open
4. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem could be caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
5. Thermocouple connection loose at con-
trol valve
6. Thermocouple damaged
7. Control valve damaged
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
3. Tightennutholding piezo ignitorto base
panel of log set. Nut is located behind
base panel
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace piezo ignitor
7. Replace piezo ignitor
1. Turn on gas supply or open manual
shutoff valve
2. Turn control knob to PILOT position
3. Press in control knob while in PILOT
position
4. Continue holdingdowncontrolknob. Re-
peatignitingoperationuntilairisremoved
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 18) or replace ODS/
pilot assembly
6. Replace gas control
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Fully open manual shutoff valve
4. A) Contact local natural gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 18) or replace ODS/
pilot assembly
5. Hand tighten until snug, then tighten 1/4
turn more
6. Replace thermocouple
7. Replace control valve
OBSERVED PROBLEM
When ignitor button is pressed, there is no
spark at ODS/pilot
When ignitor button is pressed, there is
spark at ODS/pilot but no ignition
ODS/pilot lights but flame goes out when
control knob is released
Note: For additional help, visit DESA
International’s Technical Service web
site at www.desatech.com.
Note: Alltroubleshootingitemsarelistedin
order of operation.
www.desatech.com

20
105677
UNVENTED NATURAL GAS LOG HEATER
OBSERVED PROBLEM
Burner does light after ODS/pilot is lit
Delayed ignition burner
Burner backfiring during combustion
Slightsmokeor odor during initialoperation
Moisture/condensationnoticedonwindows
Heater produces a whistling noise when
burner is lit
Whitepowderresidueformingwithinburner
box or on adjacent walls or furniture
Remote does not function
REMEDY
1. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
2. Contact local natural gas company
3. Replace burner orifice
4. Reconnect leads (see Wiring Diagram,
page 27)
5. Replace battery intransmitterandreceiver
1. Contact local natural gas company
2. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
1. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
2. Replace damaged burner
3. Replace gas control
1. Check burner for dirt and debris. If
found, clean burner (see Cleaning and
Maintenance, page 18)
2. Replace gas control
3. Problem will stop after a few hours of
operation
1. Refer to Air for Combustion and Venti-
lation requirements (page 4)
1. Turn control knob to LO position and
let warm up for a minute
2. Operateburner untilairis removedfrom
line. Have gas line checked by local
natural gas company
3. Observe minimum installation clear-
ances (see pages 7 through 9)
4. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
1. Turn heater off when using furniture
polish, wax, carpet cleaners or similar
products
1. Replace 9-volt batteries in receiver and
remote control
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Burner orifice clogged
2. Inlet gas pressure is too low
3. Burner orifice diameter is too small
4. Thermopile leads disconnected or im-
properly connected
5. Burners will not come on in remote
position
1. Manifold pressure is too low
2. Burner orifice clogged
1. Burner orifice is clogged or damaged
2. Damaged burner
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
3. Residues from manufacturing processes
and logs curing
1. Not enough combustion/ventilation air
1. Turning control knob to HI position
when burner is cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice
1. When heated, vaporsform furniture pol-
ish, wax, carpet cleaners, etc. turn into
white powder residue
1. Battery is not installed. Battery power
is low
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