FMI FLAME-MAX FVFM27NR Quick start guide

UNVENTED (VENT-FREE) NATURAL GAS
LOG HEATER
®
Patent Pending
Multi-Sided
Log Design
FVFM27NR
(Millivolt) Remote
Control Ready Model
ALSO DESIGN-CERTIFIED AS A VENTED DECORATIVE APPLIANCE
OWNER’S OPERATION AND INSTALLATION MANUAL
Save this manual for future reference.
P
I
L
O
T
O
F
F
O
N
LO
REMOTE
OFF
HI
WARNING: If the information in this
manualisnotfollowedexactly,afireor
explosionmayresultcausingproperty
damage,personalinjury,orlossoflife.
— Do not store or use gasoline or other
flammablevaporsandliquidsinthevicinity
of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediatelycallyourgassupplierfrom
a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
WARNING: Improper installation, ad-
justment, alteration, service, or main-
tenance can cause injury or property
damage. Refer to this manual for cor-
rect installation and operational pro-
cedures. For assistance or additional
informationconsultaqualifiedinstaller,
service agency, or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in
which it is installed. Provisions for 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 in-
stallation only in a solid-fuel burning
masonryUL127factory-builtfireplace,
or in an approved ventless firebox. It
is design-certified for these installa-
tionsinaccordancewithANSZ21.11.2.
Exceptions: Do not install this appli-
ance in a factory-built fireplace that
includes instructions stating it has
notbeen testedor should notbe used
with unvented gas logs.
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

2
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
1. This appliance is only for use with the
typeof gas indicated ontherating plate.
Thisappliance is not convertiblefor 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
SAFETY
INFORMATION
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning re-
semble the flu, with headaches, dizziness,
ornausea.Ifyouhavethesesigns,theheater
maynot beworkingproperly.Getfreshair
atonce!Haveheaterserviced.Somepeople
are more affected by carbon monoxide than
others. These include pregnant women,
peoplewithheartor lungdiseaseoranemia,
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,
theodoradded to the gas can fade. Gasmay
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.
WARNING ICON G 001 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:Anychangetothis
heater or its controls can be
dangerous.
• immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions
• ifyou cannot reach your gassupplier,
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
otherflammableobjects are less than
42inchesfrom the front, top, or sides
of the heater
• in high traffic areas
• in windy or drafty areas
5. Before installing in a solid fuel burn-
ingfireplace,the chimney flue 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 withglass doors closed.
Ifyouoperate heater with doors closed,
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. Youmustoperatethisheaterwithfireplace
screens in place. Make sure fireplace
screens are closed before running heater.
8. This log heater is designed to be smoke-
less. If logs ever appear to smoke, turn off
heater and call a qualified service person.
Note: During initial operation, slight
smokingcouldoccurduetologcuringand
heater burning manufacturing residues.
9. To prevent the creation of soot, follow
the instructions in Cleaning and Main-
tenance, page 20.
10. Donotallowfanstoblowdirectlyintothe
fireplace.Avoidanydraftsthatalterburner
flame patterns. Ceiling fans can create
drafts that alter burner flame patterns.Al-
tered burner patterns can cause sooting.
11. Beforeusing furniturepolish, wax, car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
theseproductsmay create a white pow-
der residue 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 heater needs fresh,outside air ven-
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 17 through 19.
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 base assemblybecomesvery hot
whenrunning heater. Keepchildren and
adults away from hot surface to avoid
burns or clothing ignition. Heater will
remain hot for a time after shutdown.
Allow surface to cool before touching.
18. Carefully supervise young children
when they are in the room with heater.
When using the hand-held remote ac-
cessory, keep remote selector switch in
the OFF position to prevent children
from turning on burners with remote.
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 heaterand to replace 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
fromyourhome forlong periodsoftime.
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
105223
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
Figure 1 - Product Identification
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,dancingyellowflames.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.Thisheater mayalsobeoperatedas
a vented decorative (ANS Z21.60) product
byopeningthefluedamper(non-thermostat
operation only).
APPLICATION
These multisided logs are designed to be
equally beautiful when viewed from any
angle.
They are designed specifically for use in
see-through,peninsula,andislandfireboxes
with multiple openings. You may also in-
stall this log heater in a standard firebox.
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.
REMOTE CONTROL
ACCESSORIES
There are four optional remote controls that
canbepurchasedseparatelyforthislogheater.
• Wall switch
• wall thermostat
• hand-held on/off remote
• hand-held thermostat remote
See Accessories, page 21.
The wall thermostat or hand-held thermo-
stat may not be used where vented decora-
tive listing is required.
UNPACKING
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 the burner.
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.
LOCAL CODES
Install and use heater with care. Follow all
localcodes.Intheabsenceoflocalcodes,use
the latest edition of The National Fuel Gas
Code ANS Z223.1, 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.
AUTO
MAN
OFF
STATUS
ONLO
HI
TEMP
Control Knob
Piezo
Ignitor
Log Set
Base Assembly
Optional
Remote
Control
Flame
Adjustment
Knob
Optional Remote
Selector Switch

4
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
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
threecriteriaabove,proceed to Deter-
miningFresh-AirFlowForHeaterLo-
cation, page 5.
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
help reduce heat loss in homes. Home own-
ersweatherstripandcaulkaroundwindows
and doors to keep the cold air out and the
warm air in. During heating months, home
ownerswanttheirhomesasairtightaspossible.
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.
Confined and Unconfined Space
The National Fuel Gas Code (ANS Z223.1,
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.Rooms communicatingdirectly 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 providedfor adequate
combustion and ventilation air.
*Adjoiningroomsarecommunicatingonly
iftherearedoorlesspassagewaysorventila-
tion grills between them.

5
105223
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)
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.
AIR FOR
COMBUSTION AND
VENTILATION
Continued
Example:
Gas water heater 40,000 Btu/Hr
Vent-free heater +39,000 Btu/Hr
Total =79,000 Btu/Hr
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, 1992, Section 5.3 or applicable local codes.

6
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
AIR FOR
COMBUSTION AND
VENTILATION
Continued
Figure 3 - Ventilation Air from Outdoors
Figure 2 - Ventilation Air from Inside Building
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
Into Adjoining
Room,
Option 1
12"
12"
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.
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.
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: Do notprovide openings for
inlet or outlet air into attic if attic has a
thermostat-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.

7
105223
OWNER’S MANUAL
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
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
chimneyfluemay create anddis-
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.
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.
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.
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.
INSTALLATION AND
CLEARANCES
(Vent-Free Operation Only)
WARNING:Maintainthemini-
mum clearances. If you can, pro-
vide greater clearances from
floor, ceiling, and adjoining wall.
MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size Side Wall Ceiling
27" 16" 42"
LOG SIZING REQUIREMENTS
Log Minimum Firebox Size
Size Height Depth Width
27" 17" 19" 32"
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. Clearancesfromthe top of the fireplace
openingto the ceiling shouldnot be less
than 42 inches.
Figure4-MinimumClearancetoWalland
Ceiling
42"
16"
Left and
Right Sides
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.Ifyouhave a central
heating system, you may run
system’scirculatingblowerwhile
using log heater. This will help
circulate the heat from your log
heater throughout the house. In
the event of a power outage, you
can use this heater as your pri-
mary heat source.
Continued
NOTICE:Stateorlocalcodesmay
onlyallowoperationofthisappli-
ance in a vented configuration.
Check your state or local codes.

8
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
Minimum Noncombustible
Material Clearances
If Not Using Mantel
Note: Ifusinga mantel, proceed toIfUsing
Mantel. If not using a mantel, follow the
information below.
You must have noncombustible material(s)
above both fireplace openings. Noncom-
bustible materials (such as slate, marble,
tile, etc.) must be at least 1/2 inch thick.
With sheet metal, you must have noncom-
bustible material behind it. Noncombus-
tiblematerial must extend atleast 8" up (for
all models). If noncombustible material is
less than 12", you must install the fireplace
hood accessory. See Figure 5 at right for
minimum clearances.
IMPORTANT: If you cannot meet these
minimumclearances,youmustoperateheater
with chimney flue damper open, see Install-
ing Damper Clamp Accessory, page 10.
INSTALLATION
Continued
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Heat Resistant
Material (A)
Noncombustible Requirements for
Material Distance (A) Safe Installation
12" or more Noncombustible material OK.
Between 8" and 12" Install fireplace hood accessory (HDABK, or
HDABR, see Accessories, page 21).
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.
NOTICE: Manual control heaters
maybeusedasaventedproduct.
Ifso,youmustalways run heater
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.
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,youmusthavenoncombustible
material behind it. Noncombustible mate-
rial must extend at least 8 inches up (for all
models). If noncombustible material is less
than12",youmustinstallthefireplacehood
accessory.Evenifnoncombustiblematerialis
morethan12", you may need the hood acces-
sory to deflect heat away from your mantel
shelf.SeeFigure5thispageandFigures6and
7, page 9 for minimum clearances.
IMPORTANT: If you cannot meet these
minimumclearances,youmustoperateheater
with chimney flue damper open, see Install-
ing Damper Clamp Accessory, page 10.

9
105223
OWNER’S MANUAL
INSTALLATION
Continued
Figure 6 - Minimum Mantel Clearances Without Using Hood
Figure 7 - Minimum Mantel Clearances When Using Hood
Continued
MANTEL CLEARANCES
In addition to meeting noncombustible ma-
terial clearances, you must also meet
requiredclearancesbetweenfireplaceopen-
ings and mantel shelf on each side of the
fireplace. If you do not meet the clearances
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
hoodthereare stillcertainminimum mantel
clearancesrequired.Followminimumclear-
ances shown in Figure 7 when using hood.
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"
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 the combus-
tible flooring (see Figure 9).
Figure8-Minimum FireplaceClearances
If Installed at Floor Level
Figure9-Minimum FireplaceClearances
Above Combustible Flooring
14"
Min.
Combustible
Material
Non-Combustible Mate
Hearth
5"
Min.
Co
m
Ma
t
Combustible
Material
Non-Combustible Material
14"
Min. Hearth
5"
Min.
Combustible
Material
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
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
Top of Fireplace
Opening
Log Sets
All Models
Underside of
Mantel Shelf
Mantel Shelf
(HDABK, HDABR)

10
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
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 fire-
place floor to allow access to
heater control panel. This will in-
sureadequate air flow and guard
against sooting. Raise fireplace
floor with noncombustible mate-
rial. Make sure material is secure.
CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle base assem-
bly by grates.
INSTALLATION
Continued
CAUTION:Do not remove the
metal data plates attached to the
heater base assembly. The data
platescontainimportantwarranty
information.
IMPORTANT: Makesuretheheaterburner
is level. If heater is not level, heater will not
work properly.
Installation Items Needed
• hardwarepackage(provided with heater)
• approvedflexible gas hose(not provided)
(if allowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" drill bit (metal
or masonry as applicable)
• flathead screwdriver
1. Apply pipe joint sealant lightly to male
threads of the fitting to be threaded into
gas control. Connect approved flexible
gas hose to gas control fitting in heater
(see Figure 11, page 11).
IMPORTANT: Hold gas fitting with
wrench when connecting flexible gas
hose.
2. Locate two masonry screws in hard-
ware package.
3. Place heater base in fireplace.
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.
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,
youmay usethisheaterasaventedproduct.
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.You mustinstall thedamper clamp
accessory (to order, see Accessories, page
21). 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 willbemaintainedatalltimes.
Chimney Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15' 39 sq. inches
15' to 30' 2.9 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

11
105223
OWNER’S MANUAL
INSTALLATION
Continued
CONNECTING TO GAS
SUPPLY
WARNING: A qualified ser-
vicepersonmustconnectheater
to gas supply. Follow all local
codes.
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.
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.
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
Continued
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Figure 11 - Attaching Flexible Gas Hose
to Heater
Figure 12 - Attaching Base Assembly to
Fireplace Floor
Fitting Flexible Gas
Hose (if allowed
by local codes)
Masonry Screw
Mounting
Flanges
CAUTION: Avoid damage to
control. Hold gas fitting with
wrenchwhenconnectingittogas
piping and/or fittings.
Installsedimenttrapinsupplylineasshown
in Figure 13. Locate sediment trap where it
is within reach for cleaning. Locate sedi-
menttrapwhere trapped matter is not likely
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.
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.
Figure 13 - Gas Connection
* Minimum inlet pressure for purpose of input adjustment.
7. Mark screw locations through one hole
on each side of the mounting flanges
(see Figure 12). If installing in a brick-
bottom fireplace, mark screw locations
in mortar joint of bricks.
8. Remove heater base from fireplace.
9. Drill holes at marked locations using
3/16" drill bit.
10. Attach base assembly to fireplace floor
usingtwo masonry screws (inhardware
package).
11. Connect to gas supply. See Connect-
ing To Gas Supply.
12. Replace logs on heater base.
3" Minimum Sediment
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)
Tee
Joint
Pipe
Nipple
Cap

12
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
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. Check all joints from gas meter to
manual shutoff valve (see Figure 15).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
4. Correct all leaks at once.
Figure 14 - Manual Shutoff Valve
ON
POSITION
OFF
POSITION
Open
Closed
Manual
Shutoff
Valve
Figure 15 - Checking Gas Joints
Gas Meter
Manual
Shutoff
Valve Control Valve
Location
INSTALLATION
Continued
WARNING: Never use an
open 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.
WARNING: Test all gas pip-
ing and connections for leaks
afterinstalling orservicing.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.
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 14 through 16). Check all other
internal joints for leaks.
7. Turn off heater (see ToTurn Off Gas to
Appliance, page 15).

13
105223
OWNER’S MANUAL
WARNING: Failure to posi-
tion the parts in accordance with
these diagrams or failure to use
only parts specifically approved
withthisheatermayresultin prop-
erty damage or personal injury.
INSTALLING LOGS
INSTALLATION
Continued
CAUTION: After installation
andperiodicallythereafter,check
to ensure that no flame comes in
contact with any log. With the
heatersettoHigh,checktoseeif
flames contact any log. If so, re-
position logs according to the
loginstallationinstructionsinthis
manual. Flames contacting logs
will create soot.
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Itisveryimportanttoinstallthelogsexactly
as instructed. Do not modify logs. Only use
logs supplied with heater.
1. Place bottom log (#1) on grate to fit as
illustratedin Figure 16. Makesure open
areasof log set lineup with burner ports
(see Figure 17). Log will fit securely on
chassis. IMPORTANT: Make sure log
does not cover any burner ports.
2. Facing front of unit, place top log (#2)
onto the pegs in the center of the bot-
tom log (see Figure 18).
3. Position log piece (#3) by aligning
holeson underside with remainingpegs
on bottom log (see Figure 19).
4. Place lava rock on fireplace floor
around base of heater.
Figure 16 - Installing Bottom Log (#1)
Figure 17 - Installing Log set (Top View)
Logs
Burner
Ports
Bottom Log (#1)
Burner
Chassis
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Figure 18 - Installing Top Log (#2)
Figure 19 - Installing Log Piece (#3)
Grate
Burner
Port
Top Log
(#2)
Peg
Log Piece (#3)
Peg

14
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
LIGHTING
INSTRUCTIONS
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
belighted byhand.When lightingthe
pilot,followtheseinstructionsexactly.
B. BEFORE LIGHTING smell all
aroundtheapplianceareaforgas.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.
• Donottouchany electricswitch;do
notuseany phone in yourbuilding.
• Immediatelycall yourgassupplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
C. Useonlyyourhandto pushinorturn
thegascontrol knob.Neverusetools.
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.
WARNING:
• If fireplace has glass doors,
never operate this heater with
glass doors closed. If you op-
erateheaterwithdoorsclosed,
heat buildup inside fireplace
will 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.
Open damper or window to vent
smell. This will only last a few
hours.
Note: Home owners generally prefer to
operate their heater with the chimney
damper closed. This will put all the heat
into the room. However, there may be
timesyouwilldesire thefullflames ofthe
High heat setting but will find the heat
outputexcessive.Youcanopenthechim-
ney damper (if you have one) fully or
partially to release some of the heat.
WARNING: Damper handle
will be hot if heater has been
running.
1. STOP! Read the safety information,
column 1.
2. Make sure manual shutoff valve is
fully open.
3. Set switch to OFF position.
4. Pressinandturncontrolknob clock-
wise to the OFF position.
5. Waitfive(5) minutes to 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. Pressin and turncontrolknob coun-
terclockwise to the PILOT
position. Press in control knob for
five (5) seconds (see Figure 20).
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.
7. With control knob pressed in, press
and release ignitor button. This will
lightpilot.The pilot is 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 pilot with match.Tolight
pilot with match, see Manual Light-
ing Procedure on page 15.
Figure 20 - Control Knob and Ignitor Button Location (Shown as Supplied,
No Control Options)
WARNING:Burnerswillcome
on automatically within one
minute when the selector switch
is in the ON position after the
pilot is lit.
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AUTO
OFF
ON
Control Knob
Ignitor Button Selector Switch
Flame Adjustment Knob

15
105223
OWNER’S MANUAL
Ignitor Electrode
Pilot Burner
Figure 21 - Pilot
CAUTION:Donottrytoadjust
heating levels by using the
manual shutoff valve.
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.
TO TURN OFF GAS
TO APPLIANCE
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. UseremotecontrolmanualOFFbutton.
3. SetselectorswitchintheOFFposition.
MANUAL LIGHTING
PROCEDURE
1. Followsteps1through6 under Light-
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, column 1.
1. Afterlighting,let pilotflameburnfor
aboutoneminute.Turncontrolknob
to ON position.Adjust flame adjust-
ment knob anywhere between HI
and LO. Slide the selector switch to
the REMOTE position. Note: The
burnermaylightifhand-heldremote
ON button was on when selector
switch was last turned off. You can
nowturnthe burnerson and offwith
the hand-held remote control unit.
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.
IMPORTANT : Do not leave the se-
lector switch in the REMOTE posi-
tionwhenthepilotisnotlit.This will
drain the battery.
GHRCT Series Operation:
2a. PresstheON/OFFbuttonto turnthe
burners on and off. When turning
burners off, the pilot will remain lit.
GHRCT Series Operation:
2b. Select the MAN (manual) or AUTO
buttononthehand-heldremotecon-
trol unit (see Figure 22).
• In manual mode, turn burners on
or off by pressing the ON or OFF
buttons on the hand-held remote
control unit.
• In auto mode, the room tempera-
tureiscontrolledbythethermostat
in the hand-held remote control
unit.To increasetheroomtempera-
ture, press the top arrow of the
TEMP button. To lower room the
temperature, press the bottom ar-
rowoftheTEMPbutton.Athigher
settings the heater will run more.
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
respondimmediatelytothetempera-
turesettingbeingturnedup ordown.
NOTICE: You must light the pilot
before using the hand-held re-
mote control unit. See Lighting
Instructions on page 14.
OPTIONAL REMOTE
OPERATION
Continued
OPERATING
HEATER
Continued
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 goesout,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
switchtotheONpositiontolightburn-
ers. Note: AUTO is only functional
when using FWMT1 or FWMS2 op-
tional accessories.
11. Set flame adjustment knob to any
level between HI and LO.
Thermostat Control Operation
(Optional FHRCT Only) The thermostat
control setting on the remote control unit
canbesettoanycomfortlevelbetweenHI
and LO. The burners will turn on and off
automaticallytomaintainthecomfortlevel
you select. The ideal comfort setting will
vary by household depending upon the
amountofspacetobeheated,theoutputof
the central heating system, etc.
For wall thermostat operation, follow in-
struction supplied with thermostat acces-
sory FWMT1. For wall switch operation
followinstructionssuppliedwithFWMS2.
Note: Allremotecontrolaccessoriesmust
bepurchasedseparately(seeAccessories,
page 21). Follow instructions included
with the remote control.

16
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
ON
OFF
REMOTE
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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
Allows burners to be turned
on and off with the hand-
held remote unit.
Figure 23 - Thermostat Hand-Held Remote Control Unit Selections (GHRCT Only)
The log heater will
automatically cycle between
pilot and the heat setting that
has been selected.
Thermocouple
Pilot Burner
Figure 24 - Correct Pilot Flame Pattern
Figure 25 - Incorrect Pilot Flame Pattern
INSPECTING
BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 24 shows a correct pilot flame pat-
tern.Figure25showsanincorrectpilotflame
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 25
• turn heater off (see To Turn Off Gas to
Appliance, page 15)
• seeTroubleshooting, pages 17 through19
Thermocouple
Pilot Burner
OPERATING
HEATER
Continued
Figure22-SettingtheSelectorSwitch,ControlKnob,andFlameAdjustmentKnobfor
Remote Operation
Selector Switch in Remote Position
(Optional Remote Control)
Control Knob in
On Position
Flame Adjustment Knob
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the
holes in the fitting at the burner entrance.
These holes may become blocked with dust
or lint. Periodically inspect these holes for
any blockage and clean if needed. Blocked
air holes will create soot.
MAIN BURNER
Periodically inspect all burner flame holes
with the heater running. All slotted burner
flame holes should be open with yellow
flame present. All round burner flame holes
should be open with a small blue flame
present. Some burner flame holes may be-
comeblockedbydebrisorrust,withnoflame
present. If so, turn off heater and let cool.
Either remove blockage or replace burner.
Blocked burner flame holes will create soot.
IMPORTANT: The hand-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. UsetheSTATUSbuttonon the hand-
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,
manuallyturnthe controlknobonthe
heater to the OFF position.

17
105223
OWNER’S MANUAL
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 notpressed in long enough
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. Tightennut holding piezoignitorto 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 holding down control knob.
Repeat igniting operation until air is
removed
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 20) 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 20) 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
Continued
Note: For additional help, visit DESA
International’s Technical Service web
site at www.desatech.com.
Note: Alltroubleshootingitemsarelistedin
order of operation.
www.desatech.com

18
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
OBSERVED PROBLEM
Burner does not light after ODS/pilot is lit
Delayed ignition burner
Burner backfiring during combustion
Slightsmoke orodor duringinitialoperation
Moisture/condensationnoticedonwindows
Heater produces a whistling noise when
burner is lit
Whitepowderresidueformingwithinburner
box or on adjacent walls or furniture
Remote does not function (FHRC and
FHRCT only)
REMEDY
1. Clean burner (see Cleaning and Mainte-
nance, page 20) or replace burner orifice
2. Contact local natural gas company
3. Replace burner orifice
4. Reconnect leads (see Wiring Diagram,
page 21)
5. Replace battery in transmitter and re-
ceiver
1. Contact local natural gas company
2. Clean burner (see Cleaning and Mainte-
nance, page 20) or replace burner orifice
1. Clean burner (see Cleaning and Mainte-
nance, page 20) 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 20)
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. Operateburneruntil air is removed from
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 20) 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 po-
sition
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, vapors fromfurniture pol-
ish, wax, carpet cleaners, etc. turn into
white powder residue
1. Battery is not installed. Battery power
is low
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105223
OWNER’S MANUAL
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.
• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.
• Ifyoucannotreachyourgassupplier,callthefiredepartment.
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. Gas leak. SeeWarning statement at
top of page
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. SeeWarning statement at
top of page
2. Control valve defective
1. Foreign matter between control valve
and burner
2. Gas leak. SeeWarning statement at
top of page
OBSERVED PROBLEM
Heater produces a clicking/ticking noise
just after burner is 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
REMEDY
1. This is common with most heaters. If
noise is excessive, contact qualified ser-
vice person
1. Open window and ventilate room. Stop
usingodor causing products whileheater
is running
2. 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 20)
1. Locate and correct all leaks (see Check-
ing Gas Connections, page 12)
2. Replace control valve
1. Take apart gas tubing and remove for-
eign matter
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 12)
IMPORTANT: Operating heater where impurities in air exist may create odors.
Cleaningsupplies,paint,paintremover,cigarettesmoke,cementsandglues,new
carpet or textiles, etc., create fumes. These fumes may mix with combustion air
and create odors. These odors will disappear over time.
TROUBLESHOOTING
Continued
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20
105223
UNVENTED NATURAL GAS LOG HEATER
FIREPLACE MANUFACTURERS INCORPORATED
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, bedding material, etc.
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).
SPECIFICATIONS
27" Remote Ready
Btu (Variable) 20,000/39,000
Type Gas Natural Gas Only
Ignition Piezo Piezo
Pressure Manifold 3.5" W.C.
Inlet Gas Pressure
(in. of water)
Maximum 10.5"
Minimum* 5"
Shipping Weight 32 lbs.
* For input adjustment
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting.
If so, contact Fireplace Manufacturers
Incorporated’s Technical Service Depart-
ment at 1-888-427-8322.
You can also visit DESA International’s
Technical Service web site at
www.desatech.com.
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burners will have delayed ignition
• heater will not produce specified heat
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.
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-
ommendthat youcleantheunitevery2,500
hours of operation or every three months.
Wealsorecommendthatyoukeeptheburner
tubeandpilotassemblycleanandfreeofdust
anddirt. Toclean thesepartswe recommend
usingcompressedair no greater than 30 PSI.
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 26).
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 hairs with a soft cloth or vacuum
cleaner nozzle.
Figure 26 - Injector Holder On Outlet
Burner Tube
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 27). With the unit off, lightly
blowair through theair inlet hole. Youmay
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 27 - Pilot Inlet Air Hole
Burner
Tube
Pilot
Assembly
Pilot Air
Inlet
Hole
Ports/Slots
MAIN BURNER
Periodically inspect all burner flame holes
with the heater running. All slotted burner
flame holes should be open with yellow
flamepresent. Allround burnerflame 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.