FMI VFP24MV Quick start guide

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UNVENTED (VENT-FREE)
PROPANE/LP GAS LOG HEATER
ALSO DESIGN-CERTIFIED AS A VENTED DECORATIVE APPLIANCE
OWNER’S OPERATION AND INSTALLATION MANUAL
LO
PILOT
OFF
HI
VFP18MV
VFP24MV
VFP30MV
Variable Manually-
Controlled
WARNING:Iftheinformationinthismanual
is not followed exactly, a fire or explosion
may result causing property damage, per-
sonal injury, or loss of life.
— Do not store or use gasoline or other
flammablevaporsandliquidsinthevicinity
of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
— Installationandservicemustbeperformed
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-
tion and operational procedures. For as-
sistance or additional information con-
sult a qualified installer, service agency,
or the gas supplier.
WARNING:Thisapplianceisforinstalla-
tiononlyinasolid-fuelburning masonry
or UL127 factory-built fireplace, or in an
approved ventless firebox. It is design-
certified for these installations in accor-
dance with ANS Z21.11.2. Exception: Do
not install this appliance in a factory-
built fireplace that includes instructions
stating it has not been tested or should
not be used with unvented gas logs.
EMBER MASTER™
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it
isinstalled.Provisions foradequatecombustionandventilationairmust beprovided.Referto
Air for Combustion and Ventilation section on page 4 of this manual.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
This appliance may be installed in an aftermarket*, permanently located, manufactured
(mobile) home, where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This
appliance is not convertible for use with other gases.

2
105071
UNVENTED PROPANE/LP GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
SAFETY
INFORMATION
DANGER: Carbon monoxide
poisoning may lead to death!
CarbonMonoxidePoisoning:Earlysignsof
carbon monoxide poisoning resemble the flu,
with headaches, dizziness, or nausea. If you
have these signs, the heater may not be work-
ing properly. Get fresh air at once! Have
heater serviced. Some people are more af-
fectedbycarbonmonoxidethanothers.These
includepregnantwomen,peoplewithheartor
lung disease or anemia, those under the influ-
ence of alcohol, and those at high altitudes.
Propane/LP Gas: Propane/LP gas is odor-
less.Anodor-makingagentisaddedtothegas.
The odor helps you detect a gas leak. How-
ever, the odor added to the gas can fade. Gas
may be present even though no odor exists.
Make certain you read and understand all
warnings.Keepthismanualforreference.It
isyourguidetosafeandproperoperationof
this heater.
1. This appliance is only for use with the
typeof gas indicated onthe rating plate.
Thisappliance is notconvertible for use
with other gases.
2. Do notplace propane/LP supplytank(s)
inside any structure. Locate propane/
LP supply tank(s) outdoors.
3. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do
not use any phone in your building
• immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions
• ifyou cannot reach yourgas supplier,
call the fire department
4. This heatershallnotbe installedina bed-
room or bathroom, unless installed as a
vented appliance (see Installing
Damper Clamp Accessory for Vented
Operation, page 10).
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.
5. 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.
6. If fireplace has glass doors, never op-
eratethis heaterwith glass doorsclosed.
Ifyou operate 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. This logheater is designedto be smoke-
less. If logs ever appear to smoke, turn
off heater and call a qualified service
person.
Note: During initial operation,
slight smoking may occur due to log
curing and heater burning manufactur-
ing residues.
8. To prevent the creation of soot, follow
the instructions in Cleaning and Main-
tenance, page 16.
9. Before using furniturepolish, wax, car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
theseproducts may create a white pow-
der residue within burner box or on
adjacent walls furniture.
10. This heater needs fresh,outside air ven-
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 17 and 18.
11. Do not run heater
• where flammable liquids or vapors
are used or stored
• under dusty conditions
12. Do not use this heater to cook food or
burn paper or other objects.
13. Do not use heater if any part has been
exposedto orunder water. Immediately
call a qualified service technician to
inspecttheroomheaterandtoreplaceany
part of the control system and any gas
control which has been under water.
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
oftraffic and away fromfurniture
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
childrenand adultsawayfromhot
surfaceto avoid burns orclothing
ignition. Heaterwillremainhotfor
a time after shutdown. Allow sur-
face to cool before touching.
Carefully supervise young chil-
dren when they are in the room
with heater.
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.

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105071
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
Figure 1 - Ember Master
Front Logs
PRODUCT
FEATURES
UNPACKING
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.
OPERATION
This heater is clean burning. It requires no
outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by
both realistic flames and glowing coals.
This heater is designed for vent-free opera-
tion with flue damper closed. It has been
tested and approved to ANS Z21.11.2 stan-
dard for unvented heaters. State and local
codesinsomeareasprohibittheuseofvent-
free heaters. This heater may also be oper-
ated as a vented decorative (ANS Z21.60)
product by opening the flue damper.
SAFETY DEVICE
This heater has a pilot with an Oxygen
Depletion Sensing (ODS) safety shutoff
system. The ODS/pilot is a required feature
for vent-free room heaters. The ODS/pilot
shuts off the heater if there is not enough
fresh air.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
Crossover Log
Rear Log
Rear
Burner
Bottom
Middle
Log
Base Assembly
Control Knob
Front Burner
Piezo Ignitor
Top Middle Log
CAUTION:Do not remove the
metal data plates attached to the
heater base assembly. The data
platescontainimportantwarranty
information.
14. Do not operate heater if any log is bro-
ken. Do not operate heater if a log is
chipped (dime-sized or larger).
15. Turn heater off and let cool before ser-
vicing. Only a qualified service person
should service and repair heater.
16. Operating heater above elevations of
4,500 feet may cause pilot outage.
17. To prevent performance problems, do
not use propane/LP fuel tank of less
than 100 lb. capacity.
LOCAL CODES
Install and use heater with care. Follow all
localcodes.Intheabsenceoflocalcodes, 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
SAFETY
INFORMATION
Continued

4
105071
UNVENTED PROPANE/LP GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
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
unless provisions are provided for adequate
combustion and ventilation air.
*Adjoiningroomsarecommunicatingonly
iftherearedoorlesspassagewaysorventila-
tion grills between them.
AIR FOR
COMBUSTION AND
VENTILATION
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weatherstripand caulkaround windows 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.
WARNING: This heater shall
notbeinstalledinaconfinedspace
or unusually tight construction
unless provisions are provided
foradequatecombustionandven-
tilation air. Read the following in-
structions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National
Fuel Gas Code, NFPA 54/ANS Z223.1, Sec-
tion5.3,AirforCombustionandVentilation.
Allspacesinhomesfallintooneofthethree
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusually tight construction is de-
fined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6 x 10-11 kg
per pa-sec-m2) or less with open-
ings gasketed or sealed and
b. weather stripping has been
added on openable windows and
doors and
c. caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors,be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tionsforplumbing,electrical,and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors , page 6.
If your home does not meet all of the
three criteria above, proceed to De-
termining Fresh-Air Flow For Heater
Location , page 5.

5
105071
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.
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 .
AIR FOR
COMBUSTION AND
VENTILATION
Continued
Example:
Gas water heater 40,000 Btu/Hr
Vent-free heater + 33,000 Btu/Hr
Total = 73,000 Btu/Hr

6
105071
UNVENTED PROPANE/LP 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.
Figure 3 - Ventilation Air from Outdoors
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connecttheseitemsdirectlytotheoutdoors
orspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces. 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 notprovide openingsfor
inlet or outlet air into attic if attic has a
thermostat-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.
Figure 2 - Ventilation Air from Inside Building
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
Into Adjoining
Room,
Option 1
12"
12"
WARNING: Rework work-
sheet, adding the space of the
adjoiningunconfinedspace.The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.

7
105071
OWNER’S MANUAL
INSTALLATION AND
CLEARANCES
(Vent-Free Operation Only)
WARNING:Maintainthemini-
mum clearances. If you can, pro-
vide greater clearances from
floor, ceiling, and adjoining wall.
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
chimneyflue may 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-free heaters add mois-
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 propane/LP gas.If yourgas supply is
notpropane/LP,donotinstallheater.Calldealer
whereyouboughtheaterforpropertypeheater.
NOTICE:Stateorlocalcodesmay
onlyallowoperationofthisappli-
ance in a vented configuration.
Check your state or local codes.
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.Ifyouhavea central
heating system, you may run
system’scirculatingblowerwhile
usingheater.Thiswillhelpcircu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
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"
Continued
*Measured at 14" depth
MINIMUM FIREPLACE
CLEARANCE TO
COMBUSTIBLE MATERIALS
Log Size 18", 24", 30"
Side Wall 16"
Ceiling 42"
Floor 5"
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-
terialand protrudes 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. Clearancesfrom the top of the fireplace
openingto the ceilingshould not 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
105071
UNVENTED PROPANE/LP GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
Heat Resistant
Material (A)
INSTALLATION
Continued
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
Noncombustible Requirements for
Material Distance (A) Safe Installation
12" or more Noncombustible material OK.
Between 8" and 12" 24" and 30"Models: Install fireplace hood accessory
(HDABK, or HDABR see Accessories , page 22).
18" Model: Noncombustible material OK.
Less than 8" Noncombustible material must be extended to at
least 8". See Between 8" and 12" , above. If you
cannot extend material, you must operate heater
with flue damper open.
Minimum Noncombustible
Material Clearances
If Not Using Mantel
Note: If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the
information below.
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheetmetal,youmusthavenoncombustible
material behind it. Noncombustible mate-
rial must extend at least 8" up (for all mod-
els). If noncombustible material is less than
12", you must install the fireplace hood
accessory (24" and 30" models only). See
Figure 5 for minimum clearances.
IMPORTANT: If you cannot meet these
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.
NOTICE: Manual control heaters
maybeusedasaventedproduct.
Ifso,youmustalwaysrun heater
with chimney flue damper open.
If running heater with damper
open, noncombustible material
above fireplace opening is not
needed. Go to Installing Damper
Clamp Accessory for Vented
Operation , page 10.
If Using Mantel
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheetmetal,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 (24" and 30" models only). Even
if noncombustible material is more than
12", you may need the hood accessory to
deflect heat away from your mantel shelf.
SeeFigure5andFigures6and7,page9,for
minimum clearances.
IMPORTANT: If you cannot meet these
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.

9
105071
OWNER’S MANUAL
Continued
Figure 6 - Minimum Mantel Clearances Without Using Hood
MANTEL CLEARANCES
Inadditiontomeetingnoncombustiblemate-
rial clearances, you must also meet required
clearances between fireplace opening and
mantel shelf. If you do not meet the clear-
ances listed below, you will need a hood.
Determining Minimum Mantel
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
hoodtherearestill certainminimummantel
clearancesrequired.Followminimumclear-
ances shown in Figure 7 when using hood.
14"
Min.
Combustible
Material
Non-Combustible
Material
Hearth
5"
Min.
Combustible
Material
FLOOR CLEARANCES
A. If installingappliance on thefloor level,
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
applianceat least 5" above the combus-
tible flooring (see Figure 9).
Figure8 -Minimum FireplaceClearances
If Installed at Floor Level Figure9-MinimumFireplaceClearances
Above Combustible Flooring
Figure 7 - Minimum Mantel Clearances When Using Hood
INSTALLATION
Continued
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" 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
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
Noncombustible
Material
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
105071
UNVENTED PROPANE/LP GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
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.Youmust installthe damperclamp
accessory (to order, see Accessories, page
22). 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
flueopeningwill bemaintained atall times.
Area of Various Standard Round Flues
Diameter (ins.) Area (sq. ins.)
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
Chimney Minimum Permanent
Height (ft.) Flue Opening (sq. ins.)
6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
INSTALLATION
Continued
Damper
Clamp
Damper
Masonry Fireplace
Figure 10 - Attaching Damper Clamp
INSTALLING HEATER BASE
ASSEMBLY
WARNING: If installing in a
sunken fireplace, special care is
needed. You must raise the fire-
place floor to allow access to
heater control panel. This will in-
sure adequate air flow and guard
against sooting. Raise fireplace
floor with noncombustible mate-
rial.Make sure materialis secure.
CAUTION: Do not pick up
heater base assembly by burn-
ers. This could damage heater.
Only handle base assembly by
grates.
WARNING: You must secure
this heater to fireplace floor. If
not, heater will move when you
adjust controls. Moving heater
may cause a gas leak.
CAUTION:Do not remove the
metal data plates attached to the
heater base assembly. The data
platescontainimportantwarranty
information.
Installation Items Needed
• hardwarepackage (provided with heater)
• approved flexible gas hose and fittings
(notprovided) (if allowed bylocal codes)
• sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" masonry drill bit
1. Apply pipe joint sealant lightly to male
threads of gas fitting (not provided).
Connect approved flexible gas hose to
gas regulator of heater (see Figure 11,
page 11).
IMPORTANT: Hold gas regulator with
wrenchwhenconnectingflexiblegashose.
2. Locatemountingbrackets,bolts,andnuts
in hardware package. Attach mounting
brackets to heater base (see Figure 12,
page 11).Attach nuts finger tight.
3. Position heater base assembly 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.
7. Mark screw locations through holes in
mounting brackets. If installing in a
brick-bottom fireplace, mark screw lo-
cations in mortar joint of bricks.
8. Remove heater base from fireplace. Re-
movemountingbracketsfromheaterbase.
9. Drill holes at marked locations using
3/16" drill bit.
10. Attach mounting brackets to fireplace
floor using masonry screws (in hard-
ware package).
11. Reattach heater base to mounting
brackets. Tighten nuts firmly.
IMPORTANT: Make sure the heater burn-
ersarelevel.Ifheaterisnotlevel,heaterwill
not work properly.
Manufactured Fireplace
Damper
Damper
Clamp
Damper

11
105071
OWNER’S MANUAL
INSTALLATION
Continued
Continued
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead 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.
CAUTION: Avoid damage to
regulator.Holdgasregulatorwith
wrenchwhenconnectingittogas
piping and/or fittings.
Installation must include an equipment
shutoffvalve, union,and plugged1/8"NPT
tap. Locate NPT tap within reach for test
gauge hook up. NPT tap must be upstream
from heater (see Figure 14).
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
fromgoing into pipe.Excess sealant in pipe
could result in clogged heater valves.
We recommend that you install a sediment
trap in supply line as shown in Figure 14.
Locate sediment trap where it is within
reach for cleaning. Install in piping system
betweenfuelsupplyandheater.Locatesedi-
ment trap where 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.
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
Figure 13 - External Regulator With Vent
Pointing Down
Propane/LP
Supply Tank External
Regulator
Vent
Pointing
Down
CONNECTING TO GAS
SUPPLY
WARNING: A qualified ser-
vicepersonmustconnectheater
to gas supply. Follow all local
codes.
CAUTION: Never connect
heaterdirectlytothepropane/LP
supply. This heater requires an
externalregulator(notsupplied).
Install the external regulator be-
tweentheheaterandpropane/LP
supply.
Installation Items Needed
Beforeinstallingheater,makesureyouhave
the items listed below.
• external regulator (supplied by installer,
see 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.
The installer must supply an external regu-
lator. The external regulator will reduce
incoming gas pressure. You must reduce
incominggaspressuretobetween11and14
inchesofwater.Ifyoudonotreduceincom-
ing gas pressure, heater regulator damage
could occur. Install external regulator with
the vent pointing down as shown in Figure
13. Pointing the vent down protects it from
freezing rain or sleet.
Heater Gas
Regulator
Flexible Gas Hose (if
allowed by local codes)
Figure 11 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Figure 12 - Attaching Heater to Fireplace
Floor
Masonry
Screw
Mounting
Bracket
Screw Mounting
Bracket
Nut Mounting
Bracket
Tee Pipe Cap
Joint Nipple
3" Minimum
Gas
Regulator
From External
Regulator
(11" W.C.* to
14" W.C.
Pressure)
CSA Design-Certified
Equipment Shutoff Valve With
1/8" NPT Tap Approved
Flexible Gas
Hose (if allowed
by local codes)
Figure 14 - Gas Connection
*Minimum inlet pressure for purpose of
input adjustment.
Sediment Trap
WARNING:Thisappliancere-
quires a 1/2" NPT (National Pipe
Thread) inlet connection to the
pressure regulator.

12
105071
UNVENTED PROPANE/LP GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
Pressure Testing gas Supply
Piping system
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliancewith its appliance
main gas valve (control valve) and
equipment shutoff valve from gas sup-
ply piping. 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 ei-
ther using compressed air or opening
propane/LP supply tank valve.
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.
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.
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
heater.Seeguidelinesunder Con-
necting to Gas Supply , page 11.
CHECKING GAS
CONNECTIONS
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipmentshutoffvalve(seeFig-
ure 15).
2. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
3. Check all joints from propane/LP sup-
plytank to equipmentshutoffvalve(see
Figure 16). Apply mixture of liquid
soap and water to gas joints. Bubbles
forming show a leak.
4. Correct all leaks at once.
INSTALLATION
Continued
Pressure Testing Heater Gas
Connections
1. Open equipment shutoff valve (see
Figure 15).
2. Open propane/LP supply tank valve.
3. Make sure control knob of heater is in
the OFF position.
4. Check all joints from equipment shutoff
valvetocontrolvalve(seeFigure16).Ap-
ply mixture of liquid soap and water to
gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
pages 14 and 15). Check all other in-
ternal joints for leaks.
7. Turn off heater (see ToTurn Off Gas to
Appliance, page 15).
Figure 15 - Equipment Shutoff Valve
Figure 16 - Checking Gas Joints
Control Valve
Location
Propane/
LP Supply
Tank
Equipment
Shutoff Valve
ON
POSITION
OFF
POSITION
Open
Closed
Equipment
Shutoff
Valve

13
105071
OWNER’S MANUAL
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
Bottom Middle
Log (#2)
Metal Post
Metal
Post
Groove
Groove
Grate
Figure 18 - Installing Bottom Middle
Log (#2)
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 20 - Installing Crossover Log (#4)
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 17). 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 18).
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 19).
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 20).
5. Place thecrossover log (#5) onthe back
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 21).
Figure 17 - Installing Front Log (#1)
Grate
Prongs
Metal Grate Bar
Front Log (#1)
Notch
Figure 19 - Installing Rear Log (#3)
Crossover
Log (#5)
Hole
Peg
Cutout
Figure 21 - Installing Crossover Log (#5)

14
105071
UNVENTED PROPANE/LP GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
4. Waitfive (5) minutes to clear out any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation, column 1. If you don’t
smell gas, go to the next step.
5. Pressin controlknob andturncoun-
terclockwise to the PILOT
position. Press in control knob for
five (5) seconds (see Figure 22).
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. This will allow air to
bleed from the gas system.
6. With control knob pressed in, press
and release ignitor button. This will
lightpilot.The pilot isattached tothe
front burner. If needed, keep press-
ing ignitor button until pilot lights.
Note: If pilot does not light, contact
aqualifiedservicepersonorgassup-
plier for repairs. Until repairs are
made,light pilot with match.To light
pilot with match, see Manual Light-
ing Procedure, page 15.
7. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
• If control knob does not pop out
when released, contact a qualified
service person or gas supplier for
repairs.
Note: If pilot goes out, repeat steps
3 through 7.
8. Push in and turn control knob coun-
terclockwise
C-clockwise
to the HIGH
position. Both burners should light.
Set control knob to desired setting.
Figure 23- Pilot
Thermocouple
Ignitor Electrode
Pilot Burner
A. Thisappliance hasapilotwhichmust
belighted byhand.Whenlightingthe
pilot,followtheseinstructionsexactly.
B. BEFORE LIGHTING smell all
aroundtheapplianceareaforgas.Be
suretosmell next to thefloorbecause
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.
• Donottouchanyelectricswitch;do
notuse any 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. Useonlyyourhand to pushinor turn
thegascontrolknob.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.
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.
Control Knob
Ignitor Button
Figure 22 - Control Knob and Ignitor
Button Location
1. STOP! Read the safety information,
column 1.
2. Make sure equipment shutoff valve
is fully open.
3. Pressinandturncontrolknob clock-
wise to the OFF position.
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
timesyouwilldesirethefullflamesof the
High heat setting but will find the heat
outputexcessive.You canopenthechim-
ney damper (if you have one) fully or
partially to release some of the heat.
WARNING:Damperhandlewill
behotifheaterhasbeenrunning.
LIGHTING
INSTRUCTIONS
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:Duringinitialoperationof
new heater, burning logs will give
off a paper-burning smell. Orange
flame will also be present. Open
damper or window to vent smell.
This will only last a few hours.
Continued
OPERATING
HEATER

15
105071
OWNER’S MANUAL
WARNING: Do not operate
heaterbetweenlockedpositions.
CAUTION:Donottrytoadjust
heatinglevelsbyusingtheequip-
ment shutoff valve.
The variable control valve can be set to
anyheatsettingandflameheightdesired,by
simply turning the control knob until that
setting is attained. Even the lowest setting
provides realistic flames and glowing em-
bers from two burners. Selecting higher
settings produces greater heat output. This
results in increased heating comfort.
Shutting Off Heater
1. Pressinandturncontrolknob clock-
wise
Clockwise
to the HIGH position.
2. Turn the control knob clockwise
Clockwise
to the PILOT position.
3. Pressincontrolknob andturnclock-
wise
Clockwise
to the OFF Position.
Shutting Off Burners Only (pilot
stays lit)
1. Turn the control knob clockwise
Clockwise
to the HIGH position.
2. Pressinandturncontrolknob clock-
wise
Clockwise
to the pilot position.
OPERATING
HEATER
Continued
TO TURN OFF GAS
TO APPLIANCE
MANUAL LIGHTING
PROCEDURE
VARIABLE CONTROL
OPERATION
1. Followsteps1 through5underLight-
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 step 8 under Lighting Instruc-
tions, page 14.
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.
FRONT BURNER FLAME
PATTERN
Figure 26 shows correct front burner flame
pattern. Figure 27 shows incorrect front
burner flame pattern. The incorrect burner
flamepatternshowsyellowtippingattopof
blue flame.
If front burner flame pattern is incorrect, as
shown in Figure 27
• turn heater off (see To Turn Off Gas to
Appliance, page 15)
• seeTroubleshooting, pages17 through 19
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
orother fine particles areburned
by heater, causing brief patches
of orange flame.
Figure 27 - Incorrect Front Burner Flame
Pattern
Figure 26 - Correct Front Burner Flame
Pattern
Yellow Tipping At Top
of Blue Flame
INSPECTING
BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 24 shows a correct pilot flame pat-
tern. Figure 25 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.
Figure 24 - Correct Pilot Flame Pattern
Figure 25 - Incorrect Pilot Flame Pattern
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 17through19
Thermocouple Pilot Burner
Pilot Burner
Thermocouple

16
105071
UNVENTED PROPANE/LP GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burners, and cir-
culating air passageways of
heaterclean.Inspecttheseareas
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
provides a clean burning flame. Keep these
holes clear of dust, dirt, lint, and pet hair.
Clean these air inlet holes prior to each
heating season. Blocked air holes will cre-
ate soot. We recommend that you clean the
unit every three months during operation
andhave heaterinspected yearly bya quali-
fied service person.
Wealsorecommendthatyoukeeptheburner
tube and pilot assembly clean and free of
dustanddirt.Tocleanthesepartswerecom-
mend using compressed air no greater than
30 PSI. Your local computer store, hard-
ware store, or home center may carry com-
pressed air in a can. You can use a vacuum
cleaner in the blow position. If using com-
pressed air in a can, please follow the direc-
tions on the can. If you don't follow direc-
tionsonthecan, youcoulddamagethepilot
assembly.
Figure 28 - Injector Holder On Outlet
Burner Tube
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 28).
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.
Burner
Tube
Injector Holder
Primary Air Inlet
Holes
Figure 29 - Pilot Inlet Air Hole
Pilot Assembly
Pilot Air Inlet
Hole
Ports/Slots
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 29). With the unit off, lightly
blowair through theair inlet hole.You may
blowthroughadrinkingstrawifcompressed
air is not available.
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).

17
105071
OWNER’S MANUAL
TROUBLESHOOTING
Note: Alltroubleshootingitemsarelistedin
order of operation.
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. Depleted gas supply
6. ODS/pilot is clogged
7. Gas regulator setting is not correct
1. Control knob not fully pressed in
2. Control knob not pressed in long enough
3. Safety interlock system has been
triggered
4. Equipment shutoff valve not fully open
5. 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
6. Thermocouple connection loose at con-
trol valve
7. Thermocouple damaged
8. 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 holdingpiezo ignitor to base
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
removed
5. Contact local propane/LP gas company
6. Clean ODS/pilot (see Cleaning and
Maintenance, page 16) or replace ODS/
pilot assembly
7. Replace gas regulator
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Waitone minute for safety interlocksys-
tem to reset. Repeat ignition operation
4. Fully open equipment shutoff valve
5. A)Contactlocalpropane/LPgascompany
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 16) or replace ODS/
pilot assembly
6. Hand tighten until snug, then tighten
1/4 turn more
7. Replace thermocouple
8. 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
www.desatech.com
Note: For additional help, visit DESA
International’s technical service web
site at www.desatech.com.

18
105071
UNVENTED PROPANE/LP GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
TROUBLESHOOTING
Continued
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 orodor duringinitial operation
Heater produces a whistling noise when
burners are lit
Whitepowderresidueformingwithinburner
box or on adjacent walls or furniture
Moisture/condensationnoticedonwindows
REMEDY
1. Contact local propane/LP gas company
2. Clean burner(s)(see Cleaningand Main-
tenance, page 16) or replace burner
orifice(s)
3. Contact qualified service person
4. Replace burner orifice(s)
1. Contact local propane/LP gas company
2. Clean burner(s)(see Cleaningand Main-
tenance, page 16) or replace burner
orifice(s)
3. Contact qualified service person
1. Clean burner (see Cleaning and Mainte-
nance, page 16) or replace burner orifice
2. Replace damaged burner
3. Replace gas regulator
1. Check burner(s) for dirt and debris. If
found,clean burner(s) (seeCleaning and
Maintenance, page 16)
2. Replace gas regulator
1. Problem will stop after a few hours of
operation
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 propane/LP gas company
3. Observe minimum installation clear-
ances (see pages 7 through 9)
4. Clean burners (see Cleaning and Main-
tenance, page 16) or replace burner
orifice(s)
1. Turn heater off when using furniture
polish, wax, carpet cleaners, or similar
products
1. Refer to Air for Combustion and Venti-
lation requirements (page 4)
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
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 regulator defective
1. Not enough air
2. Gas regulator defective
1. Residues from manufacturing processes
and logs curing
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. Not enough combustion/ventilation air
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105071
OWNER’S MANUAL
TROUBLESHOOTING
Continued
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.
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.These odors
will disappear over time.
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
at top of page
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. See Warning statement
at top of page
2. Control valve defective
1. Foreign matter between control valve
and burner
2. Gas leak. See Warning statement
at top of page
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 propane/LP gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 16)
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)
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
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20
105071
UNVENTED PROPANE/LP GAS LOG HEATER
FIREPLACE MANUFACTURERS INC.
ILLUSTRATED
PARTS
BREAKDOWN
VFP18MV
VFP24MV
VFP30MV
17 19
18
25
24
20
20
26
27
28
6
7
27
27
24
9
8
10
11 12
14
21
22
26-1 26-2
23
6-1
6-2
13
15 16
45
3
2
1R
1L