FMI EMBER MASTER VFN18R Quick start guide

UNVENTED (VENT-FREE)
NATURAL GAS LOG HEATER
VARIABLE MANUALLY-CONTROLLED MODELS ALSO DESIGN-CERTIFIED AS
VENTED DECORATIVE APPLIANCES
OWNER’S OPERATION AND INSTALLATION MANUAL
Save this manual for future reference
VFN18R
VFN24R
VFN30R
18", 24", and 30"
Remote-Ready EMBER MASTER™
P
I
L
O
T
O
F
F
O
N
LO
REMOTE
OFF
ON
HI
WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result causing property
damage, personal injury, or loss of life.
— Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
WARNING:Improperinstallation,adjust-
ment,alteration,service,ormaintenance
can cause injury or property damage.
Refer to this manual for correct installa-
tionandoperationalprocedures.Foras-
sistance or additional information con-
sultaqualifiedinstaller,serviceagency,
or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in
which it is installed. Provisions for adequate combustion and ventilation air must be
provided. Refer to Air for Combustion and Ventilation section on page 4 of this manual.
WARNING: This appliance is for installa-
tion only in a solid-fuel burning masonry
or UL127 factory-built fireplace, or in an
approved ventless firebox. It is design-
certified for these installations in accor-
dancewithANSZ21.11.2.Exceptions:Do
not install this appliance in a factory-built
fireplace that includes instructions stat-
ingithasnotbeentestedorshouldnotbe
used with unvented gas logs.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
This appliance may be installed in an aftermarket*, permanently located, manufac-
tured (mobile) home, where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This
appliance is not convertible for use with other gases.

2
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
1. This appliance is only for use with the
typeofgas indicated ontherating plate.
Thisapplianceis 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
• ifyoucannot reach yourgassupplier,
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 for Vented
Operation, page 10).
SAFETY
INFORMATION
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs
ofcarbonmonoxidepoisoningresemblethe
flu, with headaches, dizziness, or nausea. If
you have these signs, the heater may not be
working properly. Get fresh air at once!
Haveheaterserviced.Somepeoplearemore
affected by carbon monoxide than others.
Theseincludepregnantwomen,peoplewith
heartor lungdisease oranemia, thoseunder
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,
theodoradded to the gascanfade. Gas may
be present even though no odor exists.
Make certain you read and understand all
warnings.Keepthismanualforreference.It
isyourguidetosafe andproperoperationof
this heater.
WARNINGS
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, oper-
ate, or service this heater. Im-
properuseofthisheatercancause
seriousinjuryordeathfromburns,
fire, explosion, electrical shock,
and carbon monoxide poisoning.
4. Before installing in a solid fuel burn-
ingfireplace,the chimney flue andfire-
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.
5. If fireplace has glass doors, never op-
eratethisheater withglass doors closed.
Ifyouoperate heater with 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.
6. This log heater is designed to be
smokeless. If logs ever appear to
smoke, turn off heater and call a quali-
fied service person.
Note : During ini-
tial operation, slight smoking may
occur due to log curing and heater
burning manufacturing residues.
7. To prevent the creation of soot, follow
the instructions in Cleaning and Main-
tenance, page 17.
8. Before using furniturepolish, wax, car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
theseproductsmaycreate a white pow-
der residue within burner box or on
adjacent walls or furniture.
9. This heaterneedsfresh, outside airven-
tilation to run properly. This heater has
an Oxygen Depletion Sensing (ODS)
safety shutoff system. The ODS shuts
down the heater if not enough fresh air
is available. See Air for Combustion
and Ventilation, pages 4 through 6. If
heater keeps shutting off, see Trouble-
shooting, pages 18 through 20.
10. Do not run heater
• where flammable liquids or vapors
are used or stored
• under dusty conditions
11. Do not use this heater to cook food or
burn paper or other objects.
12. Do not use heater if any part has been
exposedto or underwater. Immediately
call a qualified service technician to in-
specttheroom heaterandto replaceany
part of the control system and any gas
control which has been under water.
13. Do not operate heater if any log is bro-
ken. Do not operate heater if a log is
chipped (dime-sized or larger).
WARNING: Any change to
this heater or its controls can be
dangerous.
WARNING: Do not allow fans
toblowdirectlyintothefireplace.
Avoidanydraftsthatalterburner
flame patterns. Ceiling fans can
create drafts that alter burner
flame patterns. Altered burner
patterns can cause sooting.
WARNING: Do not use a
blower insert, heat exchanger
insert,orotheraccessorynotap-
proved for use with this heater.
Due to high temperatures, the
appliance should be located out
oftrafficand away from furniture
and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Heater base assembly becomes
veryhotwhenrunningheater.Keep
childrenandadults awayfromhot
surfacetoavoid burns or clothing
ignition. Heaterwillremainhotfor
a time after shutdown. Allow sur-
face to cool before touching.
Carefully supervise young chil-
dren when they are in the room
withheater.Whenusingthehand-
held remote accessory, keep se-
lector switch in the OFF position
to prevent children from turning
on burners with remote.
Youmustoperatethisheaterwith
a fireplace screen in place. Make
sure fireplace screen is closed
before running heater.
Keeptheapplianceareaclearand
free from combustible materials,
gasoline, and other flammable
vapors and liquids.

3
105072
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
Figure 1 - Ember Master
Install and use heater with care. Follow all
localcodes.In theabsenceoflocalcodes,use
the latest edition of The National Fuel Gas
Code,ANSZ223.1,alsoknownasNFPA54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Note: Wherelisted vented decorative logs are
required,thermostatoperationisnotpermitted.
CAUTION: Do not remove the
metal data plates from the grate
assembly.Thedataplatescontain
important product information
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.
PRODUCT
FEATURES
OPERATION
This heater is clean burning. It requires no
outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by
realistic, dancing yellow flames. This heater
is designed for vent-free operation with flue
damper closed. It has been tested and ap-
provedtoANSZ21.11.2standardforunvented
heaters. State and local codes in some areas
prohibit the use of vent-free heaters. This
heatermayalso beoperatedasaventeddeco-
rative (ANS Z21.60) product by opening the
fluedamper(non-thermostatoperationonly).
SAFETY PILOT
ThisheaterhasapilotwithanOxygenDeple-
tion 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
Therearefour optional remotecontrolsthat
can be purchased separately for this log
heater:
• wall switch
• wall thermostat
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 24.
The wall thermostat or hend-held thermo-
stat may not be used where vented decora-
tive listing is required.
14. Turn heater off and let cool before servic-
ing, installing, or repairing. When using
thehand-heldremoteaccessory,makesure
the selector switch is in the OFF position.
Onlya qualifiedservice personshould in-
stall, service, or repair heater.
15. Whenusingthehand-held remoteacces-
sory, make sure the selector switch is in
the OFF position when you are away
from home for long periods of time.
16. This heater must not be connected to
any external electrical source.
17. Operating heater above elevations of
4,500 feet may cause pilot outage.
LOCAL CODESSAFETY
INFORMATION
Continued
Front
Logs
Crossover Log
Rear Log
Rear
Burner
Bottom
Middle Log
Base Assembly
Control Knob
Front
Burner
Piezo
Ignitor
Top Middle
Log
UNPACKING

4
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weatherstrip andcaulk aroundwindows and
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.
AIR FOR
COMBUSTION AND
VENTILATION
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 (6x10-11 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 and Unconfined Space
The National Fuel Gas Code, ANS Z223.1
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 aggre-
gate input rating of all appliances installed
in that space and an unconfined space as a
space whose volume is not less than 50
cubicfeetper1,000Btuperhour(4.8m3per
kw) of the aggregate input rating of all
appliances installed in that space. Rooms
communicating directly with the space in
whichtheappliancesareinstalled*,through
openings not furnished with doors, are con-
sidered a part of the unconfined space.
This heater shall not be installed in a con-
fined space or unusually tight construction
unlessprovisionsare providedforadequate
combustion and ventilation air.
*Adjoiningroomsarecommunicatingonly
iftherearedoorlesspassagewaysorventila-
tion grills between them.

5
105072
OWNER’S MANUAL
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)
73,000 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 +33,000 Btu/Hr
Total = 73,000 Btu/Hr
AIR FOR
COMBUSTION AND
VENTILATION
Continued
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, Section 5.3 or applicable local codes .
Continued

6
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
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.
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"
Figure 2 - Ventilation Air from Inside Building
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. Follow the
National Fuel Gas Code, NFPA 54/ANS
Z223.1,Section5.3,AirforCombustionand
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-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.
Figure 3 - Ventilation Air from Outdoors
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
105072
OWNER’S MANUAL
LOG SIZING REQUIREMENTS
Minimum Firebox Size
Log Front Rear*
Size Height Depth Width Width
18" 17" 14" 20" 14"
24" 17" 14" 26" 18"
30" 17" 14" 32" 22"
MINIMUM FIREPLACE CLEARANCE
TO COMBUSTIBLE MATERIALS
Log Size Side Wall Ceiling Floor*
18", 24", 30" 16" 42" 5"
*See Floor Clearances, page 9.
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
chimneyfluemay createanddis-
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:Thisheatercreates
warmaircurrents.Thesecurrents
moveheattowallsurfacesnextto
heater. Installing heater next to
vinyl or cloth wall coverings or
operatingheaterwhereimpurities
(suchastobaccosmoke,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
Useonly naturalgas.Ifyourgas supplyis not
natural gas, do not install heater. Call dealer
whereyouboughtheaterforpropertypeheater.
INSTALLATION
WARNING: Make sure the
selector switch is in the OFF po-
sition before installing heater.
INSTALLATION AND
CLEARANCES
(Vent-Free Operation Only)
WARNING:Maintainthemini-
mum clearances. If you can, pro-
vide greater clearances from
floor, ceiling, and adjoining wall.
NOTICE:Stateorlocalcodesmay
onlyallowoperationofthisappli-
ance in a vented configuration.
Check your state or local codes.
*Measured at 14" depth
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.Ifyouhaveacentral
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.
Continued
Carefullyfollowtheinstructionsbelow.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 the side of the fire-
place cabinet to any combustible ma-
terial and wall should follow the dia-
gram in Figure 4.
Example: The face of a mantel, book-
shelf, etc. is made of combustible ma-
terialandprotrudes 3 1/2"from the wall.
This combustible material must be 4"
from the side of the fireplace opening
(see Figure 4).
Note: When installing your gas logs
into a manufactured firebox, follow
firebox manufacturer’s instructions for
minimum clearances to combustible
materials.
B. Clearancesfromthe top of thefireplace
openingtothe ceilingshouldnot be less
than 42 inches.
Figure 4 - Minimum Clearance for
Combustible to Wall
.5 2
7/16
7/8
1
3
/ 4
3
1
/ 2
5
1
/ 4
7
8
3
/ 4
10
1
/ 2
12
1
/ 4
1 4 6 8 10 12 14 16
FIREBOX INCHES
INCHES
*Minimum 16 inches from Side Wall
*
Example

8
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
Heat Resistant
Material (A)
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
INSTALLATION
Continued
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,youmusthave noncombustible
material behind it. Noncombustible mate-
rial must extend at least 8 inches up. If
noncombustible material is less than 12",
you must install the fireplace hood acces-
sory. 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, page 9, for minimum clearances.
Minimum Noncombustible
Material Clearances
If Not Using Mantel
Note: If using a mantel, see 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
sheet metal, you must have noncombustible
materialbehindit. Noncombustible material
must extend at least 8" up (for all models). If
noncombustiblematerialislessthan12",you
mustinstallthefireplacehoodaccessory.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.
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.
NOTICE: Manual control heaters
maybeusedasaventedproduct.
Ifso,youmustalwaysrunheater
with chimney flue damper open.
If running heater with damper
open, noncombustible material
above fireplace opening is not
needed. Go to Installing Damper
ClampAccessoryforVentedOp-
eration
, page 10.
Noncombustible Requirements for
Material Distance (A) Safe Installation
12" or more Noncombustible material OK.
Between 8" and 12" 24"or30"Models:Installfireplacehoodaccessory
(HDABK or HDABR see Accessories , page 24).
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.

9
105072
OWNER’S MANUAL
Minimum Non-
Combustible
Material
Minimum Non-
Combustible
Material Height
Distances to
Underside of
Mantel
Top of Fireplace
Opening
Underside of
Mantel Shelf
12"
8"
(A)
18"
14"
20"
17"
22"
19"
24"
20"
All minimum
distances are
in inches
Log Set
24"/30" Models
18" Model
2
1/2
"
6"
8"
10" Mantel Shelf
Minimum Non-
Combustible
Material 8"
Min. 12" 15" 18"
All minimum
distances are
in inches
Log Sets
18" & 24" Models
20"
2
1/2
"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(HDABK,HDABR)
Top of Fireplace
Opening
Underside of
Mantel Shelf
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
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
hoodtherearestillcertain minimummantel
clearancesrequired.Followminimumclear-
ances shown in Figure 7, when using hood.
Figure 6 - Minimum Mantel Clearances Without Using Hood
Figure 7 - Minimum Mantel Clearances When Using Hood
Continued
INSTALLATION
Continued
14"
Min.
Combustible
Material
Non-Combustible
Material
Hearth
5"
Min.
Combustible
Material
FLOOR CLEARANCES
A. If installingappliance on thefloorlevel,
you must maintain the minimum dis-
tance of 14" to combustibles (see Fig-
ure 8).
B. If combustible materials are less than
14" to the fireplace, you must install
applianceatleast 5" above thecombus-
tible flooring (see Figure 9).
Figure8-Minimum FireplaceClearances
If Installed at Floor Level Figure9-Minimum FireplaceClearances
Above Combustible Flooring
NOTICE:Ifyourinstallationdoes
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
24" Models
Hood
(HDABK, HDABR)
Noncombustible Material
Combustible
Material Combustible
Material
Hearth
Log Set
24" and 30" Models
All Models
NOTICE:Surfacetemperaturesof
adjacent walls and mantels be-
comehotduringoperation.Walls
and mantels above the firebox
may become hot to the touch. If
installedproperly,thesetempera-
turesmeettherequirementofthe
national product standard. Fol-
low all minimum clearances
shown in this manual.

10
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
INSTALLATION
Continued
INSTALLING HEATER BASE
ASSEMBLY
WARNING: You must secure
this heater to fireplace floor. If
not, heater will move when you
adjust controls. Moving heater
may cause a gas leak.
WARNING: If installing in a
sunken fireplace, special care is
needed. You must raise the
fireplace floor to allow access to
heater control panel. This will
insure adequate air flow and
guard against sooting. Raise
fireplace floor with non-
combustible material. Make sure
material is secure.
CAUTION: Do not pick up
heater base assembly by burn-
ers. This could damage heater.
Only handle base assembly by
grates.
IMPORTANT: Make sure the heater burn-
ersarelevel.Ifheaterisnotlevel,heaterwill
not work properly.
CAUTION: Do not remove
themetaldataplatesattachedto
the heater base assembly. The
data plates contain important
warranty 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.
If your heater is a manually-controlled
model, you may use this heater as a vented
product. There are three reasons for operat-
ing 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.You mustinstall thedamper clamp
accessory (to order, see Accessories, page
24). 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
flueopening willbe maintainedat alltimes.
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
Figure 10 - Attaching Damper Clamp
Damper
Damper Clamp
Damper
Clamp
Damper
Damper
Manufactured Fireplace
Masonry Fireplace
Installation Items Needed
• hardwarepackage(provided with heater)
• approvedflexiblegas hose(notprovided)
(if allowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" drill bit
Note: Install optional FHRCT or FHRCT
Receiver and Hand-Held Remote Control
Kit (see Accessories, pages 24) before in-
stalling gas log heater. See installation in-
structions included with the kit.
1. Apply pipe joint sealant lightly to male
threadsofgas fitting.Connect approved
flexible gas hose to inlet side of gas
control (see Figure 11, page 11).
2. Locate two masonry screws in hard-
ware package.
3. Position heater base assembly in fire-
place.
4. Place logs in their proper position on
heater base.
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 holes in
front panel of base (see Figure 12, page
11). If installing in a brick-bottom fire-
place, mark screw locations in mortar
joint of bricks.
8. Remove heater base from fireplace.
9. Drill holes at marked locations using
3/16" masonary drill bit.
10. Attach base to fireplace floor using
masonryscrews(in hardware package).

11
105072
OWNER’S MANUAL
Installation Items Needed
Beforeinstallingheater,makesureyouhave
the items listed below.
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* AnCSAdesign-certifiedequipmentshutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection.
CONNECTING TO GAS
SUPPLY
WARNINGAqualifiedservice
person must connect heater to
gassupply.Followalllocalcodes.
INSTALLATION
Continued
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as well-head gas.
CAUTION: Use only new,
black iron or steel pipe. 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.
Continued
Installation must include an equipment
shutoffvalve, union,andplugged1/8"NPT
tap. Locate NPT tap within reach for test
gauge hook up. NPT tap must be upstream
from heater (see Figure 13).
CAUTION: Avoid damage to
gascontrol.Holdgascontrolwith
wrenchwhenconnectingittogas
piping and/or fittings.
* Minimum inlet pressure for purpose of input adjustment.
Figure 13 - Gas Connection
Figure 11 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Figure 12 - Attaching Base to Fireplace
Floor
Gas Control
Flexible Gas Hose
(if allowed by local
codes)
Masonry Screw
Masonry Screw
Tee
Joint
Pipe
Nipple
Cap 3" Minimum
Sediment
Trap
Gas
Control
CSA Design-Certified Equipment Shutoff
Valve With 1/8" NPT Tap
Approved Flexible Gas
Hose (if allowed by
local codes)
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
IMPORTANT: Installanequipmentshutoff
valve in an accessible location. The equip-
ment shutoff valve is for turning on or
shutting off the gas to the appliance.
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
fromgoinginto pipe.Excesssealant in pipe
could result in clogged heater valves.
From Gas Meter
(5" W.C.** to 10.5"
W.C. Pressure)
WARNING:Thisappliancere-
quires a 1/2" NPT (National Pipe
Thread) inlet connection to the
pressure regulator.
We recommend that you install a sediment
trap in supply line as shown in Figure 13.
Locate sediment trap where it is within
reach for cleaning. Install in piping system
between fuel supply and heater. Locate
sediment trap where trapped matter is not
likelyto freeze.A sedimenttrap trapsmois-
ture and contaminants. This keeps them
fromgoinginto heater controls.Ifsediment
trap is not installed or is installed wrong,
heater may not run properly.

12
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
ON
POSITION
OFF
POSITION
Open
Closed
Equipment
Shutoff
Valve
Figure 15 - Checking Gas Joints
Gas Meter
Equipment Shutoff Valve Gas Control
Location
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipmentshutoff 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. Check all joints from gas meter to
equipment shutoff valve (see Figure
15). Apply mixture of liquid soap and
water to gas joints. Bubbles forming
show a leak.
4. Correct all leaks at once.
Figure 14 - Equipment Shutoff Valve
INSTALLATION
Continued
CHECKING GAS
CONNECTIONS
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
to all joints. Bubbles forming
show a leak. Correct all leaks at
once.
Pressure Testing gas Supply
Piping system
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
maingasvalve(control valve)andequip-
ment shutoff valve from gas supply pip-
ing system. Pressures in excess of 1/2
psig will damage heater regulator.
2. Cap off open end of gas pipe where
equipment shutoff valve was con-
nected.
3. Pressurize supply piping system by
either using compressed air or open-
ing 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 equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
Pressure Testing Heater Gas
Connections
1. Open equipmentshutoff 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 jointsfrom equipmentshutoff
valve to gas control (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 14 through 16). Check all other
internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 15).

13
105072
OWNER’S MANUAL
Rear Log (#3)
Peg
Grate
Prong
Grate Prong
Groove in
Back of Log
Groove in
Back of Log
Top Middle
Log (#4)
Hole
Peg
Figure 19 - Installing Crossover Log (#4)
Figure 18 - Installing Rear Log (#3)
Crossover
Log (#5)
Hole
Peg
Cutout
Figure 20 - Installing Crossover Log (#5)
Bottom Middle
Log (#2)
Metal Post
Metal
Post
Groove
Groove
Grate
Figure 17 - Installing Bottom Middle
Log (#2)
Figure 16 - Installing Front Log (#1)
Grate
Prongs
Metal Grate Bar
Front Log (#1)
Notch
WARNING: Failure to posi-
tion the parts in accordance with
these diagrams or failure to use
only parts specifically approved
withthisheatermayresultinprop-
erty damage or personal injury.
INSTALLING LOGS
INSTALLATION
Continued
Each log is marked with a number. These
numberswillhelpyouidentifythelogwhen
installing. It is very important to install
these logs exactly as instructed. Do not
modify logs. Only use logs supplied with
heater.
1. Place front logs (#1L and #1R) on top
of the grate. Make sure the notches in
the bottom of the logs fit over the grate
prongs (see Figure 16). Push back of
logs flush with metal grate bar.
Note:
18" model has only one front log.
2. Rest bottom middle log (#2) behind
metal posts on front burner. Make sure
the grooves in the bottom of the log fit
over the grate. Bring the log forward
next to the metal posts. The pegs on
the log must be on top (see Figure 17).
3. Slide the grooves in the back of the rear
log (#3) against the rear grate prongs.
Make sure the peg on the log is on top
(see Figure 18).
4. Place the top middle log (#4) on the
bottom middle log (#2). Make sure the
pegs of the bottom middle log fit se-
curely in the holes of the top middle
log (see Figure 19).
5. Place thecrossoverlog (#5) ontheback
log and the top middle log. Make sure
the peg on the rear log is in the hole in
the bottom of the crossover log. The
crossover log should fit in the cutout
of the top middle log (see Figure 20).

14
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
O
F
F
P
I
L
O
T
O
N
L
O
I
H
AUTO
OFF
ON
OPERATING
HEATER
FOR YOUR SAFETY
READ BEFORE
LIGHTING
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
A. Thisappliancehas apilotwhich must
belightedbyhand.When lightingthe
pilot,followtheseinstructionsexactly.
B. BEFORE LIGHTING smell all
aroundthe applianceareafor gas. Be
suretosmellnexttothe floorbecause
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.
• Donot touchanyelectricswitch;do
notuseany phoneinyour building.
• Immediatelycallyourgassupplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
C. Useonlyyour handtopushin orturn
thegascontrolknob. Neveruse tools.
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.
LIGHTING
INSTRUCTIONS
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:Duringinitialoperation
of new heater, burning logs will
give off a paper-burning smell.
Orange flame will also be
present. Open damper or win-
dow to vent smell. This will only
last a few hours.
Note: Home owners generally prefer to
operate their heater with the chimney
damper closed. This will put all the heat
into the room. However, there may be
timesyou willdesirethefullflames ofthe
Hi heat setting but will find the heat
outputexcessive.Youcanopenthe chim-
ney damper (if you have one) fully or
partially to release some of the heat.
WARNING:Damperhandlewill
behotifheaterhasbeenrunning.
WARNING:Burnerswillcome
on automatically within one
minute when the selector switch
is in the ON position after the
pilot is lit.
Figure 21 - Control Knob and Ignitor Button Location
Control Knob
4. Pressin andturncontrolknobclock-
wise totheOFF position(see
Figure 21).
5. Waitfive(5)minutestoclear out any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation in column 1. If you don’t
smell gas, go to the next step.
6. Pressin and turncontrolknob coun-
terclockwise to the PILOT
position. Press in control knob for
five (5) seconds (see Figure 21).
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
for30 seconds or less.Thiswillallow
air to bleed from the gas system.
7. With control knob pressed in, press
and release ignitor button. This will
lightpilot.The pilotisattachedto the
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
supplierfor repairs.Untilrepairsare
made,lightpilot with match.To light
pilot with match, see Manual Light-
ing Procedure,page 15.
Selector Switch in OFF Position
Flame
Adjustment
Knob
Ignitor Button
1. STOP! Read the safety information,
column 1.
2. Make sure equipment shutoff valve
is fully open.
3. SetselectorswitchintheOFFposition.

15
105072
OWNER’S MANUAL
OPERATING
HEATER
Continued
TO TURN OFF GAS TO
APPLIANCE
1. Followsteps1 through6underLight-
ing Instructions, page 14.
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, Lighting
Instructions, column 1.
Shutting Off Heater
1. Turncontrolknobclockwise
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
thepilotlitbydoingone of the following:
1. Turncontrolknobclockwise
to the PILOT position.
2. Use remote control manual OFF
button.
3. SetselectorswitchintheOFFposition.
Continued
MANUAL LIGHTING
PROCEDURE
Ignitor Electrode
Pilot Burner
Figure 22 - Pilot
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. Note: AUTO is only func-
tional when using GWMT1 or
GWMS2 optional accessories.
11. Set flame adjustment knob to any
level between HI and LO.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
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: Ifpilotgoes out, repeatsteps
4 through 8.
WARNING: Make sure the
selector switch is in the OFF po-
sition when you are away from
home for long periods of time.
Heater will come on automati-
cally with selector switch in the
ON position.
Note: Allremotecontrolaccessoriesmust
bepurchasedseparately(seeAccessories,
page 24). Follow instructions included
with the remote control.
Thermostat Control Operation
(Optional GHRCTA Series Only) The
thermostat control setting on the remote
control unit can be set to any comfort
levelbetweenWARMERandCOOLER.
The burners will turn on and off auto-
matically to maintain the comfort level
you select. The ideal comfort setting will
vary by household depending upon the
amount of space to be heated, the output
of the central heating system, etc.
OPTIONAL REMOTE
OPERATION
NOTICE: You must light the pilot
before using the remote control
unit.See LightingInstructions on
pages 14 and 15.
For wall thermostat operation, follow
instruction supplied with thermostat ac-
cessory GWMT1. For wall switch opera-
tion follow instructions supplied with
GWMS2.
1. Afterlighting,let pilotflameburnfor
aboutoneminute.Turncontrol knob
to ON position.Adjust flame adjust-
ment knob anywhere between HI
and LO. Slide the selector switch to
theAUTOposition. Note: The burn-
ersmaylight ifhand-heldremoteON
button was on when selector switch
waslast turnedoff.You cannowturn
theburnerson andoffwiththehand-
held remote control unit.
IMPORTANT: Do not leave the se-
lector switch in the AUTO position
when the pilot is not lit. This will
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.
GHRC Series Operation:
2a. Pressthe ON/OFF buttonto turnthe
burners on and off. When turning
burners off, the pilot will remain lit.
GHRCTA Series Operation:
2b. Press theAUTO/ON/OFF button on
the hand-held remote control (see
Figure 24, page 16).The lights to the
left of the button will show AUTO,
ON, or OFF.
• In the ON mode, the burners will
ignite. The heater is in manual
mode when ON is lit.
• IntheAUTOmode,thethermostat
in the hand-held remote unit con-
trols the room temperature. To in-
creasetheroomtemperature,press
the top arrow of theTEMP button.
To lower the room temperature,
press the bottom arrow of the
TEMP button. At higher settings
the heater will run longer.

16
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
Thermocouple
Pilot Burner
Figure 25 - Correct Pilot Flame Pattern
Figure 26 - Incorrect Pilot Flame Pattern
INSPECTING
BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 25 shows a correct pilot flame pat-
tern. Figure 26 shows an incorrect pilot
flame pattern. The incorrect pilot flame is
not touching the thermocouple. This will
cause the thermocouple to cool. When the
thermocouple cools, the heater will shut
down.
If pilot flame pattern is incorrect, as shown
in Figure 26
• turn heater off (see To Turn Off Gas to
Appliance, page 15)
• seeTroubleshooting,pages 18 through20
Thermocouple
Pilot Burner
OPERATING
HEATER
Continued
Figure 23 - Setting the Remote Selector Switch, Control Knob, and Flame Adjustment
Knob for Remote Operation
O
F
F
P
I
L
O
T
O
N
L
O
I
H
ON
OFF
REMOTE
Selector Switch in
Remote Position
Control Knob in
On Position Flame Adjustment Knob
Figure 24 - Thermostat Hand-Held Remote Control Unit Selections
(GHRCTA Series Only)
Increases Room
Temperature in
AUTO Mode
Decreases Room
Temperature in
AUTO Mode
Turns Burners
On or Off and
Allows You to
Choose the Auto
Setting
Shows
Temperature
Setting
The Log Heater
will Automatically
Cycle between
Pilot and the Heat
Setting that has
been Selected
IMPORTANT: This remote control
hasbeenspeciallyengineered to take
an air temperature sample every 5.5
minutes in the auto mode. It will not
respondimmediately tothetempera-
turesetting beingturnedupordown.
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. To turn the burner off, press the
AUTO/ON/OFF button until OFF
lights. The pilot will remain lit.
IMPORTANT: To turn the pilot off,
manually turn the control knob on
the heater to the OFF position.

17
105072
OWNER’S MANUAL
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If front burner flame
patternshowsyellowtipping,fol-
lowinstructionsatbottomofthis
page.Yellowflameonrearburner
is normal.
Figure 28 - Incorrect Front Burner Flame
Pattern
Figure 27 - Correct Front Burner Flame
Pattern
Yellow Tipping At Top of
Blue Flame
FRONT BURNER FLAME
PATTERN
Figure 27 shows correct front burner flame
pattern. Figure 28 shows incorrect front
burner flame pattern. The incorrect burner
flamepatternshowsyellowtippingattopof
blue flame.
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
orotherfineparticlesareburned
by heater, causing brief patches
of orange flame.
If front burner flame pattern is incorrect, as
shown in Figure 28
• turn heater off (see To Turn Off Gas to
Appliance, page 15)
• seeTroubleshooting, pages18 through 20
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,
bedding material, pet hair, etc.
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 pro-
videsacleanburningflame.Keeptheseholes
clear of dust, dirt, lint, and pet hair. Clean
these air inlet holes prior to each heating
season.Blockedairholeswillcreatesoot.We
recommendthatyoucleantheuniteverythree
months during operation and have heater in-
spected yearly by a qualified service person.
Wealsorecommendthatyoukeeptheburner
tubeandpilotassemblycleanandfreeofdust
anddirt. Tocleanthese partswe recommend
usingcompressedair no greater than30PSI.
Yourlocalcomputerstore,hardwarestore,or
home center may carry compressed air in a
can. You can use a vacuum cleaner in the
blow position. If using compressed air in a
can, please follow the directions on the can.
Ifyoudon'tfollowdirectionsonthecan, you
could damage the pilot assembly.
1. Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
2. Inspect burner, pilot, and primary air
inlet holes on injector holder for dust
and dirt (see Figure 29).
3. Blow air through the ports/slots and
holes in the burner.
4. Check the injector holder located at the
end of the burner tube again. Remove
any large particles of dust, dirt, lint, or
pet hair 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 30). With the unit off, lightly
blowairthrough theairinlet hole.Youmay
blowthroughadrinkingstrawifcompressed
air is not available.
Figure 29 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Pilot
Assembly
Pilot Air
Inlet Hole
Ports/Slots
Figure 30 - Pilot Inlet Air Hole
LOGS
• If you remove logs for cleaning, refer to
Installing Logs, page 13 , to properly re-
place logs.
• Replace log(s) if broken or chipped
(dime-sized or larger).
INSPECTING
BURNERS
Continued
Burner
Tube
Injector Holder
Primary Air Inlet
Holes
Ports/Slots

18
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
WARNING: Turn off and un-
plug heater and let cool before
servicing. Only a qualified ser-
vice person should 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 positioned wrong
7. Ignitor electrode broken
1. Gas supply turned off or equipment
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 control setting is not correct
1. Control knob not fully pressed in
2. Control knobnotpressed in long enough
3. Equipment 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. Gas control damaged
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
TROUBLESHOOTING
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
3. Tighten nut holding piezo ignitortobase
panel of log set. Nut is located behind
base panel
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace ignitor
7. Replace ignitor
1. Turn on gas supply or open equipment
shutoff valve
2. Turn control knob to PILOT position
3. Press in control knob while in PILOT
position
4. Continue holding down control knob.
Repeat igniting operation until air is re-
moved
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 17) 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 equipment shutoff valve
4. A) Contact local natural gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 17) or replace ODS/
pilot assembly
5. Hand tighten until snug, then tighten 1/4
turn more
6. Replace thermocouple
7. Replace gas control
Note: For additional help, visit DESA
International’stechnicalservicewebsite
at www.desatech.com.
Note: Alltroubleshootingitemsarelistedin
order of operation.
www.desatech.com

19
105072
OWNER’S MANUAL
TROUBLESHOOTING
Continued
Continued
REMEDY
1. Contact local natural gas company
2. Clean burner(s)(see Cleaning andMain-
tenance, page 17) or replace burner
orifice(s)
3. Contact qualified service person
4. Replace burner orifice(s)
5. Put selector switch in ON position
6. See Wiring Diagram, page 21
1. Contact local natural gas company
2. Clean burner(s)(see Cleaning andMain-
tenance, page 17) or replace burner
orifice(s)
3. Contact qualified service person
1. Clean burner (see Cleaning and Mainte-
nance, page 17) or replace burner orifice
2. Replace damaged burner
3. Replace gas control
1. Check burner(s) for dirt and debris. If
found,cleanburner(s) (seeCleaningand
Maintenance, page 17)
2. Replace gas control
1. 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. Operate burners until air is removed
from line. Have gas line checked by lo-
cal natural gas company
3. Observe minimum installation clear-
ances (see pages 7 through 9)
4. Clean burners (see Cleaning and Main-
tenance, page 17) or replace burner
orifice(s)
1. Turn heater off when using furniture
polish, wax, carpet cleaners, or similar
products
1. Replace 9-volt batteries in receiver and
remote control
OBSERVED PROBLEM
One or both burners do not light after ODS/
pilot is lit
Delayed ignition of one or both burners
Burner backfiring during combustion
Yellow flame in front burner during burner
combustion
Slightsmoke orodorduring initialoperation
Moisture/condensationnoticedonwindows
Heater produces a whistling noise when
burners are lit
Whitepowderresidueformingwithinburner
box or on adjacent walls or furniture
Remote does not function (GHRC and
GHRCT Only)
POSSIBLE CAUSE
1. Inlet gas pressure is too low
2. Burner orifice(s) clogged
3. Mislocated crossover tube
4. Burner orifice(s) diameter is too small
5. Selector switch in OFF position
6. Wire disconnected from gas control
1. Manifold pressure is too low
2. Burner orifice(s) clogged
3. Mislocated crossover tube
1. Burner orifice is clogged or damaged
2. Damaged burner
3. Gas control defective
1. Not enough air
2. Gas control defective
1. Residues from manufacturing processes
and logs curing
1. Not enough combustion/ventilation air
1. Turning control knob to HI position
when burners are cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner
orifice(s)
1. When heated,vaporsfrom furniture pol-
ish, wax, carpet cleaners, etc. turn into
white powder residue
1. Battery is not installed. Battery power
is low
www.desatech.com

20
105072
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
REMEDY
1. This is common with most heaters. If
noise is excessive, contact qualified ser-
vice person
1. Open windowto ventilate room.Stop us-
ing odor causing products while heater
is running
2. Refill supply tank
3. Locate and correct all leaks (see Check-
ing Gas Connections, page 12)
1. Open windowand/or door forventilation
2. Contact local natural gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 17)
1. Locate and correct all leaks (see Check-
ing Gas Connections, page 12)
2. Replace gas control
1. Take apart gas tubing and remove for-
eign matter
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 12)
1. Move hand-held remote control unit far-
ther away from the heater
WARNING: 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.
•Immediatelycallyourgassupplierfromaneighbor’sphone.Followthe
gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire department.
POSSIBLE CAUSE
1. Metal expanding while heating or con-
tracting while cooling
1. Heater burning vapors from paint, hair
spray, glues, cleaners, chemicals, new
carpet, etc. (See IMPORTANT state-
ment above)
2. Low fuel supply
3. Gas leak. See Warning statement
above
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. See Warning statement
above
2. Gas control defective
1. Foreign matter between control valve
and burner
2. Gas leak. See Warning statement
above
1. Hand-held remote control unit needs to
be moved away from heater
OBSERVED PROBLEM
Heater produces a clicking/ticking noise
just after burners are lit or shut off
Heater produces unwanted odors
Heater shuts off in use (ODS operates)
Gas odor even when control knob is in OFF
position
Gas odor during combustion
Log set cycles to pilot, but room tempera-
ture drops to a lower than ideal level before
log set comes back on (GHRCT Only)
TROUBLESHOOTING
Continued
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning
supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles,
etc.,createfumes.Thesefumesmaymix withcombustionairandcreateodors.Theseodors
will disappear over time.
www.desatech.com