UNVENTED (VENT-FREE)
NATURAL GAS LOG HEATER
VARIABLE MANUALLY-CONTROLLED MODELS ALSO DESIGN-CERTIFIED AS
VENTED DECORATIVE APPLIANCES
OWNER’S OPERATION AND INSTALLATION MANUAL
VFN18R
VFN24R
VFN30R
REMOTE
OFF
ON
18", 24", and 30"
Remote-Ready
™
EMBER MASTER
WARNING:Improperinstallation,adjust-
ment,alteration,service,ormaintenance
can cause injury or property damage.
Refer to this manual for correct installa-
tionandoperationalprocedures. Foras-
sistance or additional information con-
sult a qualified installer, service agency,
or the gas supplier.
WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result causing property
damage, personal injury, or loss of life.
— Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
WARNING: This appliance is for installa-
tion only in a solid-fuel burning masonry
or UL127 factory-built fireplace, or in an
approved ventless firebox. It is design-
certified for these installations in accor-
dance with ANS Z21.11.2. Exceptions: Do
not install this appliance in a factory-built
fireplace that includes instructions stat-
ing it has not been tested or should not be
used with unvented gas logs.
• If you cannot reach your gas sup-
plier, call the fire department.
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
WARNING: 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.
This appliance may be installed in an aftermarket*, permanently located, manufac-
tured (mobile) home, where not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This
appliance is not convertible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
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OWNER’S MANUAL
SAFETY
LOCAL CODES
PRODUCT
Install and use heater with care. Follow all
local codes. In the absence of local codes, use
the latest edition of The National Fuel Gas
Code,ANSZ223.1,alsoknownasNFPA54*.
INFORMATION
FEATURES
Continued
OPERATION
14. Turn heater off and let cool before servic-
ing, installing, or repairing. When using
thehand-heldremoteaccessory, makesure
the selector switch is in the OFF position.
Only a qualified service person should in-
stall, service, or repair heater.
This heater is clean burning. It requires no
outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by
realistic, dancing yellow flames. This heater
is designed for vent-free operation with flue
damper closed. It has been tested and ap-
provedtoANSZ21.11.2standardforunvented
heaters. State and local codes in some areas
prohibit the use of vent-free heaters. This
heater may also be operated as a vented deco-
rative (ANS Z21.60) product by opening the
fluedamper(non-thermostatoperationonly).
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
15. When using the hand-held remote acces-
sory, make sure the selector switch is in
the OFF position when you are away
from home for long periods of time.
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Note: Where listed vented decorative logs are
required,thermostatoperationisnotpermitted.
16. This heater must not be connected to
any external electrical source.
17. Operating heater above elevations of
4,500 feet may cause pilot outage.
UNPACKING
CAUTION: Do not remove the
metal data plates from the grate
assembly. Thedataplatescontain
important product information
SAFETY PILOT
ThisheaterhasapilotwithanOxygenDeple-
tion Sensing (ODS) safety shutoff system.
The ODS/pilot is a required feature for vent-
free room heaters. The ODS/pilot shuts off
the heater if there is not enough fresh air.
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.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
OPTIONAL REMOTE
CONTROL ACCESSORIES
2. Remove all protective packaging ap-
plied to logs and heater for shipment.
3. Check all items for any shipping dam- There are four optional remote controls that
age. If damaged, promptly inform
dealer where you bought heater.
can be purchased separately for this log
heater:
• wall switch
PRODUCT
• wall thermostat
IDENTIFICATION
• hand-held ON/OFF remote
• hand-held thermostat remote
Crossover Log
Top Middle
Log
See Accessories, page 24.
Rear Log
The wall thermostat or hend-held thermo-
stat may not be used where vented decora-
tive listing is required.
Front
Logs
Rear
Burner
Piezo
Ignitor
Bottom
Middle Log
Front
Burner
Base Assembly
Control Knob
Figure 1 - Ember Master
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
Confined and Unconfined Space
PROVIDING ADEQUATE
VENTILATION
AIR FOR
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 m3 per 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
cubic feet per 1,000 Btu per hour (4.8 m3 per
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.
COMBUSTION AND
VENTILATION
The following are excerpts from National
Fuel Gas Code, NFPA 54/ANS Z223.1, Sec-
tion5.3, AirforCombustionandVentilation.
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.
All spaces in homes fall into one of the three
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.
Today’s homes are built more energy effi-
cient than ever. New materials, increased
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.
Unusually Tight Construction
insulation, and new construction methods The air that leaks around doors and win-
helpreduceheatlossinhomes.Homeowners dows may provide enough fresh air for
weather strip and caulk around windows and combustion and ventilation. However, in
doorstokeepthecoldairoutandthewarmair buildings of unusually tight construction,
in. During heating months, home owners you must provide additional fresh air.
* Adjoining rooms are communicating only
iftherearedoorlesspassagewaysorventila-
tion grills between them.
want their homes as airtight as possible.
Unusually tight construction is de-
While it is good to make your home energy fined as construction where:
efficient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
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
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.
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-
tions for plumbing, 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.
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OWNER’S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this work sheet to determine if you have a confined or unconfined space.
Space:Includestheroominwhichyouwillinstallheaterplusanyadjoiningroomswithdoorlesspassagewaysorventilationgrillsbetween
the rooms.
1. Determine the volume of the space (length x width x height).
Length x Width x Height = _________________ cu. ft. (volume of space)
Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of
the space.
2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
_____________________ (volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater
Gas water heater*
Gas furnace
______________ Btu/Hr
______________ Btu/Hr
______________ Btu/Hr
______________ Btu/Hr
______________ Btu/Hr
Example:
Gas water heater
Vent-free heater
Total
40,000 Btu/Hr
33,000 Btu/Hr
73,000 Btu/Hr
Vented gas heater
Gas fireplace logs
+
=
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)
The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr thespace cansupport.
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.
WARNING:If the area in which the heater may be operated is smaller than that defined as an unconfined space
or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of
the methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3 or applicable local codes.
Continued
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
AIR FOR
12"
COMBUSTION AND
VENTILATION
Ventilation
Continued
Ventilation Grills
Into Adjoining Room,
Option 2
Grills
Into Adjoining
Room,
VENTILATION AIR
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Air From Inside
Building
Option 1
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
(see options 1 and 2, Figure 2). You can also
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.
12"
Figure 2 - Ventilation Air from Inside Building
WARNING: Rework work-
sheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Ventilated
Outlet
Attic
Air
Outlet
Air
Ventilation Air From Outdoors
To Attic
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.
Connect these items directly to the outdoors
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.
To
Crawl
Space
Inlet
Air
Ventilated
Crawl Space
Inlet Air
Figure 3 - Ventilation Air from Outdoors
IMPORTANT: Do not provide openings
for inlet or outlet air into attic if attic has a
thermostat-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.
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OWNER’S MANUAL
LOG SIZING REQUIREMENTS
INSTALLATION
WARNING: Never install the
heater
Minimum Firebox Size
Front Rear*
Size Height Depth Width Width
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
heat source. If you have a central
heating system, you may run
system’scirculatingblowerwhile
using heater. This will help circu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
Log
• 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
18"
24"
30"
17"
17"
17"
14"
14"
14"
20"
26"
32"
14"
18"
22"
*Measured at 14" depth
Carefullyfollowtheinstructionsbelow.This
will ensure safe installation into a masonry,
UL127-listed manufactured fireplace, or
listed vent-free firebox.
• in high traffic areas
• in windy or drafty areas
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.
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.
WARNING: A qualified ser-
vice person must install heater.
Follow all local codes.
NOTICE:Stateorlocalcodesmay
onlyallowoperationofthisappli-
ance in a vented configuration.
Check your state or local codes.
Example: The face of a mantel, book-
shelf, etc. is made of combustible ma-
terial and protrudes 3 1/2" from the wall.
This combustible material must be 4"
from the side of the fireplace opening
(see Figure 4).
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.
WARNING: Make sure the
selector switch is in the OFF po-
sition before installing heater.
Note: When installing your gas logs
into a manufactured firebox, follow
firebox manufacturer’s instructions for
minimum clearances to combustible
materials.
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
will ignite if highly heated. A dirty
chimney flue may create and dis-
tribute soot within the house. In-
spectchimneyfluefordamage. If
damaged,operateheaterwithflue
damper closed.
CHECK GAS TYPE
B. Clearances from the top of the fireplace
opening to the ceiling should not be less
than 42 inches.
Use only natural gas. If your gas supply is not
natural gas, do not install heater. Call dealer
whereyouboughtheaterforpropertypeheater.
121/4
101/2
Example
INSTALLATION AND
CLEARANCES
(Vent-Free Operation Only)
8 3
/4
7
51/4
31/2
13/4
7/8
WARNING:Maintainthemini-
mum clearances. If you can, pro-
vide greater clearances from
floor, ceiling, and adjoining wall.
7/16
FIREBOX
.5
1
2
4
6
8
10 12 14 16
*
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.
INCHES
*Minimum 16 inches from Side Wall
Figure 4 - Minimum Clearance for
Combustible to Wall
MINIMUM FIREPLACE CLEARANCE
TO COMBUSTIBLE MATERIALS
Log Size Side Wall Ceiling Floor*
18", 24", 30"
16"
42"
5"
*See Floor Clearances, page 9.
Continued
105072
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
IMPORTANT: If you cannot meet these
If Using Mantel
INSTALLATION
minimum clearances, you must operate
heater with chimney flue damper open. Go
to Installing Damper Clamp Accessory for
Vented Operation, page 10.
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheet metal, you must have noncombustible
material behind it. Noncombustible mate-
rial must extend at least 8 inches up. If
noncombustible material is less than 12",
you must install the fireplace hood acces-
sory. Even if noncombustible material is
more than 12", you may need the hood
accessory to deflect heat away from your
mantel shelf. See Figure 5, and Figures 6
and 7, page 9, for minimum clearances.
Continued
NOTICE: Manual control heaters
maybeusedasaventedproduct.
If so, you must always 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
Clamp Accessory for Vented Op-
eration, page 10.
Minimum Noncombustible
Material Clearances
Noncombustible
Material Distance (A)
Requirements for
Safe Installation
If Not Using Mantel
Note: If using a mantel, see If Using
Mantel. If not using a mantel, follow the
information below.
12" or more
Noncombustible material OK.
Between 8" and 12"
24"or30"Models:Installfireplacehoodaccessory
(HDABK or HDABR see Accessories, page 24).
You must have noncombustible material(s)
above the fireplace opening. Noncombus-
tible materials (such as slate, marble, tile,
etc.) must be at least 1/2 inch thick. With
sheet metal, you must have noncombustible
material behind it. Noncombustible material
must extend at least 8" up (for all models). If
noncombustiblematerialislessthan12",you
mustinstallthefireplacehoodaccessory.See
Figure 5 for minimum clearances.
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.
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.
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace
105072
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OWNER’S MANUAL
Mantel Shelf
INSTALLATION
10"
8"
Continued
Underside of
Mantel Shelf
MANTEL CLEARANCES
6"
2 1/2"
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.
All minimum
distances are
in inches
Minimum Non-
Combustible
Material
(A)
L
Determining Minimum Mantel
Clearance
Log Set
12"
8"
18"
14"
20"
22"
24"
20"
24" and 30" Models
3
1
/
16
/
"
4
18
"
2
18" Model
If you meet minimum clearance between
mantel shelf and top of fireplace opening, a
hood is not required (see Figure 6).
Top of Fireplace
Opening
Minimum Non-
Combustible
Material Height
Distances to
Underside of
Mantel
Determining Minimum Mantel
Clearance When Using a Hood
If minimum clearances in Figure 6, are not
met, you must have a hood. When using a
hood there are still certain minimum mantel
clearancesrequired.Followminimumclear-
ances shown in Figure 7, when using hood.
Figure 6 - Minimum Mantel Clearances Without Using Hood
12"
Underside of
Mantel Shelf
10"
8"
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.
6"
2 1/2"
All minimum
distances are
in inches
Minimum Non-
Combustible
Material
Log Sets
8"
Min.
12"
15"
18"
20"
All Models
Top of Fireplace
Opening
Hood
(HDABK, HDABR)
Distances to
Underside of
Mantel
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
Figure 7 - Minimum Mantel Clearances When Using Hood
• remove the mantel
FLOOR CLEARANCES
Combustible
Hearth
Combustible
Material
A. If installing appliance on the floor level,
you must maintain the minimum dis-
tance of 14" to combustibles (see Fig-
ure 8).
14"
Min.
Material
5"
Min.
Noncombustible Material
B. If combustible materials are less than
14" to the fireplace, you must install
appliance at least 5" above the combus-
tible flooring (see Figure 9).
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Continued
105072
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
Damper Clamp
INSTALLATION
Continued
INSTALLING DAMPER
CLAMP ACCESSORY FOR
VENTED OPERATION
Damper
Clamp
Damper
Damper
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.
Damper
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.
Manufactured Fireplace
Masonry Fireplace
Figure 10 - Attaching Damper Clamp
1. The fireplace does not meet the clear-
ance to combustibles requirements for
vent-free operation.
INSTALLING HEATER BASE
ASSEMBLY
Installation Items Needed
• hardware package (provided with heater)
2. State or local codes do not permit vent-
free operation.
• approved flexible gas hose (not provided)
(if allowed by local codes)
CAUTION: Do not remove
the metal data plates attached to
the heater base assembly. The
data plates contain important
warranty information.
3. You prefer vented operation.
• sealant (resistant to propane/LP gas, not
provided)
If reasons number 1 or 2 above apply to you,
you must permanently open chimney flue
damper. You must install the damper clamp
accessory (to order, see Accessories, page
24). This will insure vented operation (see
Figure 10). The damper clamp will keep
damper open. Installation instructions are
included with clamp accessory.
• electric drill with 3/16" drill bit
Note: Install optional FHRCT or FHRCT
Receiver and Hand-Held Remote Control
Kit (see Accessories, pages 24) before in-
stalling gas log heater. See installation in-
structions included with the kit.
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.
1. Apply pipe joint sealant lightly to male
threads of gas fitting. Connect approved
flexible gas hose to inlet side of gas
control (see Figure 11, page 11).
See chart below for minimum permanent
flue opening you must provide. Attach
damper clamp so the minimum permanent
flue opening will be maintained at all times.
WARNING: If installing in a
sunken fireplace, special care is
needed. You must raise the
fireplace floor to allow access to
heater control panel. This will
insure adequate air flow and
guard against sooting. Raise
fireplace floor with non-
combustible material. Make sure
material is secure.
2. Locate two masonry screws in hard-
ware package.
Area of Various Standard
Round Flues
3. Position heater base assembly in fire-
place.
Diameter (ins.) Area (sq. ins.)
4. Place logs in their proper position on
heater base.
5"
6"
7"
8"
20 sq. inches
29 sq. inches
39 sq. inches
51 sq. inches
5. Center heater base and logs front-to-
back and side-to-side in fireplace.
6. Carefully remove logs without moving
heater base.
CAUTION: Do not pick up
heater base assembly by burn-
ers. This could damage heater.
Only handle base assembly by
grates.
Chimney
Minimum Permanent
7. Mark screw locations through holes in
front panel of base (see Figure 12, page
11). If installing in a brick-bottom fire-
place, mark screw locations in mortar
joint of bricks.
Height (ft.) Flue Opening (sq. ins.)
6' to 15'
15' to 30'
39 sq. inches
29 sq. inches
IMPORTANT: Make sure the heater burn-
ersarelevel.Ifheaterisnotlevel,heaterwill
not work properly.
8. Remove heater base from fireplace.
9. Drill holes at marked locations using
3/16" masonary drill bit.
10. Attach base to fireplace floor using
masonry screws (in hardware package).
105072
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OWNER’S MANUAL
IMPORTANT:Installanequipmentshutoff
valve in an accessible location. The equip-
ment shutoff valve is for turning on or
shutting off the gas to the appliance.
Installation Items Needed
INSTALLATION
Beforeinstallingheater,makesureyouhave
the items listed below.
Continued
Gas Control
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe
could result in clogged heater valves.
Flexible Gas Hose
(if allowed by local
codes)
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
• tee joint
• pipe wrench
Figure 11 - Attaching Flexible Gas Hose
to Heater Gas Regulator
* An CSA/AGA design-certified equipment
shutoff valve with 1/8" NPT tap is an accept-
able alternative to test gauge connection.
We recommend that you install a sediment
trap in supply line as shown in Figure 13.
Locate sediment trap where it is within
reach for cleaning. Install in piping system
between fuel supply and heater. Locate
sediment trap where trapped matter is not
likely to freeze. A sediment trap traps mois-
ture 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.
Masonry Screw
Masonry Screw
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as well-head gas.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes.Usepipeof1/2"
diameter or greater to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
CAUTION: Avoid damage to
gascontrol.Holdgascontrolwith
wrenchwhenconnectingittogas
piping and/or fittings.
Figure 12 - Attaching Base to Fireplace
Floor
Installation must include an equipment
shutoff valve, union, and plugged 1/8" NPT
tap. Locate NPT tap within reach for test
gauge hook up. NPT tap must be upstream
from heater (see Figure 13).
CONNECTING TO GAS
SUPPLY
CSA/AGA Design-Certified Equipment
Shutoff Valve With 1/8" NPT Tap
WARNING:Thisappliancere-
quires a 1/2" NPT (National Pipe
Thread) inlet connection to the
pressure regulator.
Approved Flexible Gas
Hose (if allowed by
local codes)
From Gas Meter
(5" W.C.** to 10.5"
W.C. Pressure)
WARNINGAqualifiedservice
person must connect heater to
gassupply.Followalllocalcodes.
Gas
Control
Tee
Joint
Pipe
Sediment
Trap
Nipple
3" Minimum
Cap
Figure 13 - Gas Connection
* Minimum inlet pressure for purpose of input adjustment.
Continued
105072
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
Pressure Testing Heater Gas
Connections
1. Open equipment shutoff valve (see Fig-
INSTALLATION
Continued
1. Close equipment shutoff valve (see Fig-
ure 14).
CHECKING GAS
CONNECTIONS
ure 14).
2. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
2. Open main gas valve located on or near
gas meter.
WARNING: Test all gas pip-
3. Make sure control knob of heater is in
the OFF position.
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
3. Check all joints from gas meter to
equipment shutoff valve (see Figure
15). Apply mixture of liquid soap and
water to gas joints. Bubbles forming
show a leak.
4. Check all joints from equipment shutoff
valve to gas control (see Figure 15).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
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.
4. Correct all leaks at once.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
pages 14 through 16). Check all other
internal joints for leaks.
Open
7. Turn off heater (see To Turn Off Gas to
Appliance, page 15).
Pressure Testing gas Supply
Piping system
Equipment
Shutoff
Valve
Closed
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
Figure 14 - Equipment Shutoff Valve
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment shutoff valve from gas supply pip-
ing system. Pressures in excess of 1/2
psig will damage heater regulator.
Gas Control
Location
Equipment Shutoff Valve
2. Cap off open end of gas pipe where
equipment shutoff valve was con-
nected.
Gas Meter
3. Pressurize supply piping system by
either using compressed air or open-
ing main gas valve located on or near
gas meter.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
Figure 15 - Checking Gas Joints
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
105072
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OWNER’S MANUAL
Peg
INSTALLATION
Rear Log (#3)
Front Log (#1)
Continued
Groove in
Back of Log
Groove in
Back of Log
INSTALLING LOGS
Notch
Grate Prong
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.
Grate
Prong
Grate
Prongs
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.
Metal Grate Bar
Figure 16 - Installing Front Log (#1)
Figure 18 - Installing Rear Log (#3)
1. Place front logs (#1L and #1R) on top
of the grate. Make sure the notches in
the bottom of the logs fit over the grate
prongs (see Figure 16). Push back of
logs flush with metal grate bar. Note:
18" model has only one front log.
Bottom Middle
Log (#2)
Hole
Top Middle
Log (#4)
Groove
Groove
2. Rest bottom middle log (#2) behind
metal posts on front burner. Make sure
the grooves in the bottom of the log fit
over the grate. Bring the log forward
next to the metal posts. The pegs on
the log must be on top (see Figure 17).
Peg
Metal
Post
3. Slide the grooves in the back of the rear
log (#3) against the rear grate prongs.
Make sure the peg on the log is on top
(see Figure 18).
Metal Post
Grate
4. Place the top middle log (#4) on the
bottom middle log (#2). Make sure the
pegs of the bottom middle log fit se-
curely in the holes of the top middle
log (see Figure 19).
Figure 17 - Installing Bottom Middle
Log (#2)
Figure 19 - Installing Crossover Log (#4)
Crossover
Log (#5)
5. Place the crossover log (#5) on the 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 20).
Hole
Cutout
Peg
Figure 20 - Installing Crossover Log (#5)
105072
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
1. STOP! Read the safety information,
LIGHTING
INSTRUCTIONS
OPERATING
HEATER
column 1.
2. Make sure equipment shutoff valve
is fully open.
WARNING
FOR YOUR SAFETY
• If fireplace has glass doors,
never operate this heater with
glassdoorsclosed.Ifyouoper-
ate heater with doors closed,
heatbuildupinsidefireplacewill
cause glass to burst. Also if
fireplace opening has vents at
the bottom, you must open the
vents before operating heater.
• You must operate this heater
withafireplacescreeninplace.
Make sure fireplace screen is
closed before running heater.
3. Set selector switch in the OFF position.
READ BEFORE
LIGHTING
WARNING:Burnerswillcome
on automatically within one
minute when the selector switch
is in the ON position after the
pilot is lit.
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
4. Press in and turn control knob clock-
wise
to the OFF position (see
Figure 21).
A. This appliance has a pilot which must
be lighted by hand. When lighting the
pilot, follow these instructions exactly.
5. Wait five (5) minutes to clear out any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation in column 1. If you don’t
smell gas, go to the next step.
B. BEFORE LIGHTING smell all
around the appliance area for gas. Be
sure to smell next to the floor because
some gas is heavier than air and will
settle on the floor.
NOTICE:Duringinitialoperation
of new heater, burning logs will
give off a paper-burning smell.
Orange flame will also be
present. Open damper or win-
dow to vent smell. This will only
last a few hours.
6. Press in and turn control knob coun-
terclockwise
to the PILOT
WHAT TO DO IF YOU SMELL
GAS
position. Press in control knob for
five (5) seconds (see Figure 21).
• Do not try to light any appliance.
• Do not touch any electric switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
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 less. This will allow
air to bleed from the gas system.
Note: Home owners generally prefer to
operate their heater with the chimney
damper closed. This will put all the heat
into the room. However, there may be
times you will desire the full flames of the
Hi heat setting but will find the heat
output excessive. You can open the chim-
ney damper (if you have one) fully or
partially to release some of the heat.
7. With control knob pressed in, press
and release ignitor button. This will
light pilot. The pilot is attached to the
front burner. If needed, keep press-
ing ignitor button until pilot lights.
C. Use only your hand to push in or turn
the gas control knob. Never use tools.
If the knob will not push in or turn
by hand, don’t try to repair it, call a
qualified service technician or gas
supplier. Force or attempted repair
may result in a fire or explosion.
WARNING:Damperhandlewill
be hot if heater has been running.
Note: If pilot does not stay lit, con-
tact a qualified service person or gas
supplier for repairs. Until repairs are
made, light pilot with match. To light
pilot with match, see Manual Light-
ing Procedure, page 15.
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.
Control Knob
Flame
Adjustment
Knob
O
O
O
AUTO
OFF
ON
Ignitor Button
Selector Switch in OFF Position
Figure 21 - Control Knob and Ignitor Button Location
105072
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OWNER’S MANUAL
For wall thermostat operation, follow
TO TURN OFF GAS TO
APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
to the OFF position.
OPERATING
instruction supplied with thermostat ac-
cessory GWMT1. For wall switch opera-
tion follow instructions supplied with
GWMS2.
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.
NOTICE: You must light the pilot
before using the remote control
unit.SeeLightingInstructionson
pages 14 and 15.
2a. Set selector switch in the OFF position.
2b. If Using Optional Hand-Held Re-
mote: Set selector switch in the OFF
position to keep from draining battery.
1. After lighting, let pilot flame burn for
about one minute. Turn control knob
to ON position. Adjust flame adjust-
ment knob anywhere between HI
and LO. Slide the selector switch to
theAUTO position. Note:The burn-
ers may light if hand-held remote ON
button was on when selector switch
was last turned off.You can now turn
the burners on and off with the hand-
held remote control unit.
Shutting Off Burners Only (pilot
stays lit)
Note: If pilot goes out, repeat steps
4 through 8.
9. Slightly push in and turn control
You may shut off the burners and keep
the pilot lit by doing one of the following:
knob counterclockwise
the ON position.
to
1. Turn control knob clockwise
to the PILOT position.
10. Wait one minute and switch selector
switch to the ON position to light
burners. Note: AUTO is only func-
tional when using GWMT1 or
GWMS2 optional accessories.
2. Use remote control manual OFF
button.
3. Set selector switch in the OFF position.
IMPORTANT: Do not leave the se-
lector switch in the AUTO position
when the pilot is not lit. This will
drain the battery.
11. Set flame adjustment knob to any
level between HI and LO.
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 6 under Light-
ing Instructions, page 14.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
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.
2. Depress control knob and light pilot
with match.
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.
3. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob. Now
follow steps 9 through 11, Lighting
Instructions, column 1.
GHRC Series Operation:
2a. Press the ON/OFF button to turn the
burners on and off. When turning
burners off, the pilot will remain lit.
GHRCTA Series Operation:
OPTIONAL REMOTE
OPERATION
2b. Press the AUTO/ON/OFF button on
the hand-held remote control (see
Figure 24, page 16). The lights to the
left of the button will show AUTO,
ON, or OFF.
Ignitor Electrode
Pilot Burner
Note:Allremotecontrolaccessoriesmust
bepurchasedseparately(seeAccessories,
page 24). Follow instructions included
with the remote control.
• In the ON mode, the burners will
ignite. The heater is in manual
mode when ON is lit.
Thermostat Control Operation
• In theAUTO mode, the thermostat
in the hand-held remote unit con-
trols the room temperature. To in-
crease the room temperature, press
the top arrow of the TEMP button.
To lower the room temperature,
press the bottom arrow of the
TEMP button. At higher settings
the heater will run longer.
(Optional GHRCTA Series Only) The
thermostat control setting on the remote
control unit can be set to any comfort
level between WARMER and COOLER.
The burners will turn on and off auto-
matically to maintain the comfort level
you select. The ideal comfort setting will
vary by household depending upon the
amount of space to be heated, the output
of the central heating system, etc.
Figure 22 - Pilot
Continued
105072
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
OPERATING
INSPECTING
BURNERS
Pilot Burner
Thermocouple
HEATER
Continued
Check pilot flame pattern and burner flame
patterns often.
IMPORTANT: This remote control
has been specially engineered to take
an air temperature sample every 5.5
minutes in the auto mode. It will not
respond immediately to the tempera-
ture setting being turned up or down.
PILOT FLAME PATTERN
Figure 25 shows a correct pilot flame pat-
tern. Figure 26 shows an incorrect pilot
flame pattern. The incorrect pilot flame is
not touching the thermocouple. This will
cause the thermocouple to cool. When the
thermocouple cools, the heater will shut
down.
IMPORTANT: The hand-held remote
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.
Figure 25 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
If pilot flame pattern is incorrect, as shown
in Figure 26
• turn heater off (see To Turn Off Gas to
Appliance, page 15)
3. To turn the burner off, press the
AUTO/ON/OFF button until OFF
lights. The pilot will remain lit.
• see Troubleshooting, pages 18 through 20
IMPORTANT: To turn the pilot off,
manually turn the control knob on
the heater to the OFF position.
Figure 26 - Incorrect Pilot Flame Pattern
Control Knob in
On Position
Flame Adjustment Knob
O
O
ON
OFF
REMOTE
Selector Switch in
Remote Position
Figure 23 - Setting the Remote Selector Switch, Control Knob, and Flame Adjustment
Knob for Remote Operation
Increases Room
Temperature in
AUTO Mode
Temperature
Shows
Setting
Decreases Room
Temperature in
The Log Heater
AUTO Mode
will Automatically
Cycle between
Turns Burners
Pilot and the Heat
On or Off and
Setting that has
Allows You to
been Selected
Choose the Auto
Setting
Figure 24 - Thermostat Hand-Held Remote Control Unit Selections
(GHRCTA Series Only)
105072
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OWNER’S MANUAL
5. Blow air into the primary air holes on
INSPECTING
CLEANING AND
the injector holder.
BURNERS
MAINTENANCE
6. In case any large clumps of dust have
now been pushed into the burner repeat
steps 3 and 4.
Continued
WARNING: Turn off heater
and let cool before cleaning.
FRONT BURNER FLAME
PATTERN
Clean the pilot assembly also. A yellow tip
on the pilot flame indicates dust and dirt in
the pilot assembly. There is a small pilot air
inlet hole about two inches from where the
pilot flame comes out of the pilot assembly
(see Figure 30). With the unit off, lightly
blow air through the air inlet hole. You may
blowthroughadrinkingstrawifcompressed
air is not available.
Figure 27 shows correct front burner flame
pattern. Figure 28 shows incorrect front
burner flame pattern. The incorrect burner
flame pattern shows yellow tipping at top of
blue flame.
CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heaterinspectedyearlybyaquali-
fied service person. Heater may
needmorefrequentcleaningdue
to excessive lint from carpeting,
bedding material, pet hair, etc.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If front burner flame
patternshowsyellowtipping,fol-
low instructions at bottom of this
page.Yellowflameonrearburner
is normal.
LOGS
• If you remove logs for cleaning, refer to
Installing Logs, page 13 , to properly re-
place logs.
CLEANING BURNER
INJECTOR HOLDER AND
PILOT AIR INLET HOLE
• Replace log(s) if broken or chipped
(dime-sized or larger).
The primary air inlet holes allow the proper
amount of air to mix with the gas. This pro-
videsacleanburningflame. Keeptheseholes
clear of dust, dirt, lint, and pet hair. Clean
these air inlet holes prior to each heating
season.Blockedairholeswillcreatesoot.We
recommendthatyoucleantheuniteverythree
months during operation and have heater in-
spected yearly by a qualified service person.
Injector Holder
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles are burned
by heater, causing brief patches
of orange flame.
Ports/Slots
Burner
Tube
If front burner flame pattern is incorrect, as
shown in Figure 28
Wealsorecommendthatyoukeeptheburner
tubeandpilotassemblycleanandfreeofdust
and dirt. To clean these parts we recommend
using compressed air 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.
If you don't follow directions on the can, you
could damage the pilot assembly.
Primary Air Inlet
Holes
• turn heater off (see To Turn Off Gas to
Appliance, page 15)
• see Troubleshooting, pages 18 through 20
Figure 29 - Injector Holder On Outlet
Burner Tube
Ports/Slots
Burner
Tube
Figure 27 - Correct Front Burner Flame
Pattern
Pilot
Assembly
1. Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
Yellow Tipping At Top of
Blue Flame
Pilot Air
Inlet Hole
2. Inspect burner, pilot, and primary air
inlet holes on injector holder for dust
and dirt (see Figure 29).
3. Blow air through the ports/slots and
holes in the burner.
4. Check the injector holder located at the
end of the burner tube again. Remove
any large particles of dust, dirt, lint, or
pet hair with a soft cloth or vacuum
cleaner nozzle.
Figure 28 - Incorrect Front Burner Flame
Pattern
Figure 30 - Pilot Inlet Air Hole
105072
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
TROUBLESHOOTING
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,
Note: For additional help, visit DESA
International’stechnicalservicewebsite
needle, or similar object to clean
ODS/pilot.ThiscandamageODS/
pilot unit.
Note:Alltroubleshootingitemsarelistedin
order of operation.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
When ignitor button is pressed, there is no 1. Ignitor electrode not connected to igni- 1. Reconnect ignitor cable
spark at ODS/pilot
tor cable
2. Ignitor cable pinched or wet
2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
3. Tighten nut holding piezo ignitor to base
panel of log set. Nut is located behind
base panel
3. Piezo ignitor nut is loose
4. Broken ignitor cable
4. Replace ignitor cable
5. Bad piezo ignitor
5. Replace piezo ignitor
6. Ignitor electrode positioned wrong
7. Ignitor electrode broken
6. Replace ignitor
7. Replace ignitor
When ignitor button is pressed, there is 1. Gas supply turned off or equipment 1. Turn on gas supply or open equipment
spark at ODS/pilot but no ignition
shutoff valve closed
shutoff valve
2. Control knob not in PILOT position
2. Turn control knob to PILOT position
3. Control knob not pressed in while in 3. Press in control knob while in PILOT
PILOT position
position
4. Air in gas lines when installed
4. Continue holding down control knob.
Repeat igniting operation until air is re-
moved
5. ODS/pilot is clogged
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 17) or replace ODS/
pilot assembly
6. Gas control setting is not correct
6. Replace gas control
ODS/pilot lights but flame goes out when 1. Control knob not fully pressed in
1. Press in control knob fully
control knob is released
2. Control knob not pressed in long enough 2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Equipment shutoff valve not fully open 3. Fully open equipment shutoff valve
4. Pilot flame not touching thermocouple, 4. A) Contact local natural gas company
which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem could be caused by one or both of
the following:
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 17) or replace ODS/
pilot assembly
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
5. Thermocouple connection loose at con- 5. Hand tighten until snug, then tighten 1/4
trol valve
turn more
6. Thermocouple damaged
6. Replace thermocouple
7. Gas control damaged
7. Replace gas control
105072
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OWNER’S MANUAL
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
One or both burners do not light after ODS/ 1. Inlet gas pressure is too low
1. Contact local natural gas company
2. Clean burner(s) (see Cleaning and Main-
tenance, page 17) or replace burner
orifice(s)
pilot is lit
2. Burner orifice(s) clogged
3. Mislocated crossover tube
3. Contact qualified service person
4. Burner orifice(s) diameter is too small
5. Selector switch in OFF position
6. Wire disconnected from gas control
4. Replace burner orifice(s)
5. Put selector switch in ON position
6. See Wiring Diagram, page 21
Delayed ignition of one or both burners
Burner backfiring during combustion
1. Manifold pressure is too low
2. Burner orifice(s) clogged
1. Contact local natural gas company
2. Clean burner(s) (see Cleaning and Main-
tenance, page 17) or replace burner
orifice(s)
3. Mislocated crossover tube
3. Contact qualified service person
1. Burner orifice is clogged or damaged
1. Clean burner (see Cleaning and Mainte-
nance, page 17) or replace burner orifice
2. Replace damaged burner
2. Damaged burner
3. Gas control defective
3. Replace gas control
Yellow flame in front burner during burner 1. Not enough air
combustion
1. Check burner(s) for dirt and debris. If
found, clean burner(s) (see Cleaning and
Maintenance, page 17)
2. Gas control defective
2. Replace gas control
Slight smoke or odor during initial operation 1. Residues from manufacturing processes 1. Problem will stop after a few hours of
and logs curing
operation
Moisture/condensationnoticedonwindows 1. Not enough combustion/ventilation air
1. Refer to Air for Combustion and Venti-
lation requirements (page 4)
Heater produces a whistling noise when 1. Turning control knob to HI position 1. Turn control knob to LO position and
burners are lit
when burners are cold
2. Air in gas line
let warm up for a minute
2. Operate burners until air is removed
from line. Have gas line checked by lo-
cal natural gas company
3. Air passageways on heater blocked
3. Observe minimum installation clear-
ances (see pages 7 through 9)
4. Dirty or partially clogged burner 4. Clean burners (see Cleaning and Main-
orifice(s)
tenance, page 17) or replace burner
orifice(s)
Whitepowderresidueformingwithinburner 1. When heated, vapors from furniture pol- 1. Turn heater off when using furniture
box or on adjacent walls or furniture
ish, wax, carpet cleaners, etc. turn into
polish, wax, carpet cleaners, or similar
white powder residue
products
Remote does not function (GHRC and 1. Battery is not installed. Battery power 1. Replace 9-volt batteries in receiver and
GHRCT Only)
is low
remote control
Continued
105072
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
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., create fumes. These fumes may mix with combustion air and create odors. These odors
will disappear over time.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Heater produces a clicking/ticking noise 1. Metal expanding while heating or con- 1. This is common with most heaters. If
just after burners are lit or shut off
tracting while cooling
noise is excessive, contact qualified ser-
vice person
Heater produces unwanted odors
1. Heater burning vapors from paint, hair 1. Open window to ventilate room. Stop us-
spray, glues, cleaners, chemicals, new
carpet, etc. (See IMPORTANT state-
ment above)
ing odor causing products while heater
is running
2. Low fuel supply
2. Refill supply tank
3. Gas leak. See Warning statement 3. Locate and correct all leaks (see Check-
above
ing Gas Connections, page 12)
Heater shuts off in use (ODS operates)
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Open window and/or door for ventilation
2. Contact local natural gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 17)
Gas odor even when control knob is in OFF 1. Gas leak. See Warning statement 1. Locate and correct all leaks (see Check-
position
above
ing Gas Connections, page 12)
2. Gas control defective
2. Replace gas control
Gas odor during combustion
1. Foreign matter between control valve 1. Take apart gas tubing and remove for-
and burner eign matter
2. Gas leak. See Warning statement 2. Locate and correct all leaks (see Check-
above ing Gas Connections, page 12)
Log set cycles to pilot, but room tempera- 1. Hand-held remote control unit needs to 1. Move hand-held remote control unit far-
ture drops to a lower than ideal level before
log set comes back on (GHRCT Only)
be moved away from heater
ther away from the heater
105072
20
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OWNER’S MANUAL
SPECIFICATIONS
REPLACEMENT
PARTS
18" Variable
24" Variable
30" Variable
21,5000/36,000
Note: Use only original replacement parts.
Thiswillprotectyourwarrantycoveragefor
parts replaced under warranty.
Btu (Variable)
Type Gas
16,000/26,000
20,000/33,000
Natural Gas Only Natural Gas Only Natural Gas Only
Ignition
Piezo
Piezo
Piezo
PARTS UNDER WARRANTY
Manifold Pressure
3.4" W.C.
3.4" W.C.
3.4" W.C.
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), call Fireplace Manufacturers
Incorporated's Technical Service Depart-
ment at 1-888-427-8322.
Inlet Gas Pressure
(in. of water)
Maximum
10.5"
5"
10.5"
5"
10.5"
5"
Minimum*
When calling Fireplace Manufacturers Inc.,
have ready
Shipping Weight
32 lbs.
34 lbs.
36 lbs.
* For purpose of input adjustment
• your name and address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
WIRING DIAGRAM
Usually, we will ask you to return the defec-
tive part to the factory.
AUT
O
OFF
PARTS NOT UNDER
WARRANTY
O
N
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), call Fireplace Manufacturers
Incorporated's Parts Department at 1-800-
888-2050 for referral information.
Thermopile
When calling Fireplace Manufacturers Inc.,
have ready
SERVICE HINTS
When Gas Pressure is Too Low
• pilot will not stay lit
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.
• model number of your heater
• the replacement part number
• 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
You can also visit DESA International’s
technical services web site at
Youmayfeelyourgaspressureistoolowor
gas quality is bad. If so, contact your local
natural gas supplier.
105072
21
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
ILLUSTRATED
PARTS
BREAKDOWN
VFN18R
4
5
VFN24R
VFN30R
3
2
1L
6
1R
31
24
7
9
9-2
8
9-1
7
7
31
10
11
26
25
28
31
29
27
12
14
13
15
21
17
20
19
16
18
22
23
30
105072
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OWNER’S MANUAL
This list contains replaceable parts used in your heater. When ordering parts, follow the
instructions listed under Replacement Parts on page 21 of this manual.
PARTS LIST
VFN18R
VFN24R
VFN30R
KEY
NO.
PART NUMBERS
VFN24R
VFN18R
VFN30R
DESCRIPTION
QTY.
1L
1R
2
3
4
5
6
7
8
105241-01
—
105241-02
105241-03
105243-02
105245-02
105249-02
105247-02
103779-01
098249-01
103780-01
101330-05
101008-01
101007-01
100999-05
103984-02
098271-06
102445-01
103588-01
103782-01
M12461-26
103781-01
098264-02
103784-02
103784-01
103587-01CK
M11084-26
099387-12
100609-01
101004-11
101004-08
103783-01
099998-01
103284-02
099918-02
M11084-26
105998-01
105999-01
106000-01
106001-01
106002-01
106003-01
103779-01
098249-01
103780-01
101330-06
101008-01
101007-01
100999-06
103984-03
098271-06
102445-01
103588-01
103782-01
M12461-26
103781-01
098264-02
103784-02
103784-01
103587-01CK
M11084-26
099387-12
100609-01
101004-04
101004-08
103783-01
099998-01
103284-02
099918-02
M11084-26
Left Front Log (#1L)
Right Front Log (#1R)
Bottom Middle Log (#2)
Rear Log (#3)
Top Middle Log (#4)
Crossover Log (#5)
O.D.S. Pilot
1
1
1
1
1
1
1
6
1
1
1
1
1
1
1
1
1
1
5
1
1
1
1
1
2
1
1
1
1
1
1
1
1
6
105243-01
105245-01
105249-01
105247-01
103779-01
098249-01
103780-01
101330-01
101008-01
101007-01
100999-04
103984-01
098271-01
102445-01
103588-01
103782-01
M12461-26
103781-01
098264-02
103784-02
103784-01
103587-01CK
M11084-26
099387-12
100609-01
101004-11
101004-11
103783-01
099998-01
103284-02
099918-02
M11084-26
Nut
Pilot Bracket
9
Front Burner Assembly
Crossover Burner Gasket
Crossover Burner
Rear Burner Assembly
Base Assembly and Decal
Ignitor Cable
Piezo Ignitor
Heat Shield
Valve Bracket
Screw
Gas Control
Male Fitting
Flame Adjustment Knob
Control Knob
Switch Plate
Screw
Pilot Tube
Pilot Tube
9-1
9-2
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Read Burner Injector
Front Burner injector
Remote Burner Tube
Switch
Wiring Harness
Pilot Regulator
Screw
PARTS AVAILABLE — NOT SHOWN
100563-01
103877-01
100565-01
100639-01
101137-02
GA6060
100563-01
100563-01
103877-01
100565-01
100639-01
101137-02
GA6060
Warning Plate
1
1
1
1
1
1
103877-01
100565-01
100639-01
101137-02
GA6060
Lighting Instructions Plate
Warning Plate Fastener
Caution Decal
Hardware Kit
Lava Rock
105072
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FIREPLACE MANUFACTURERS INC.
UNVENTED NATURAL GAS LOG HEATER
WALL-MOUNT THERMOSTAT
W
A
R
ACCESSORIES
M
E
R
C
O
T
O
E
L
M
E
R
P
SWITCH - GWMT1
(PART #01996)
(Not Shown)
A
U
T
O
O
N
O
Purchasetheseheateraccessoriesfromyour
local dealer. If they can not supply these
accessories, call Fireplace Manufacturers
Incorporated's Parts Department at 1-800-
888-2050 for referral information. You can
also write to the address listed on the back
page of this manual.
F
F
For all models. The desired comfort setting
can be selected on the wall thermostat and
the log heater will automatically cycle from
pilot to the heat setting selected.
RECEIVER AND HAND-HELD
THERMOSTAT REMOTE
CONTROL KIT - GHRCT
SERIES
WALL-MOUNT ON/OFF
SWITCH - GWMS2
(PART #01997)
(Not Shown)
(PART #01994)
For all models. Allows the gas log heater to
be turned on and off with a wall switch.
For all models. Allows the gas log heater to
be operated in a manually or thermostati-
cally-controlled mode. You can turn the gas
log heater on and off without ever leaving
the comfort of your easy chair.
FIREPLACE HOOD
Black - HDABK (Part #01244)
DAMPER CLAMP - 02017
(Not Shown)
Brass - HDABR (Part #01245)
Permanently opens chimney flue damper
for vented operation. Can be used only with
non-thermostat accessories.
For all models. Helps deflect heat away
from mantel or wall above fireplace. Fits
openings 28" to 49" wide.
LAVA ROCK - GA6060
(Not Shown)
For all models. Order when additional rock
is desired. (3 1/2 lb. bag)
RECEIVER AND HAND-HELD
REMOTE CONTROL KIT
GHRC SERIES (PART #01995)
For all models. Allows the gas log heater to
be turned on and off by using a hand-held
remote control.
105072
24
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OWNER’S MANUAL
NOTES
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_______________________________________________________________________________________________
105072
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WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written
warranty. We make no other warranty, expressed or implied.
LIMITED WARRANTY
VENT-FREE NATURAL GAS LOG HEATERS
DESA International warrants this product to be free from defects in materials and components for one (1) year from the date of first
purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions.
There is no warranty on the batteries. To make a claim under this warranty the Bill of Sale or cancelled check must be presented.
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to restore this heater
to proper operating condition and an allowance for labor when provided by a DESA International Authorized Service Center. Warranty
part(s) MUST be obtained through authorized dealers of this product and/or DESA International who will provide original factory
replacement parts. Failure to use original factory replacement parts voids this warranty. The heater MUST be installed by a qualified
installer in accordance with all local codes and instructions furnished with the unit.
This warranty does not apply to parts that are not in original condition because of normal wear and tear, or parts that fail or become
damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by improper installation. Travel, diagnostic cost,
labor, transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner.
TOTHEFULLEXTENTALLOWEDBYTHELAWOFTHEJURISDICTIONTHATGOVERNSTHESALEOFTHEPRODUCT;
THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURA-
TION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE TO ONE (1) YEAR ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND
DESA INTERNATIONAL'S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA
INTERNATIONAL SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential
damages, so the above limitation on implied warranties, or exclusion or limitation on damages may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.
For information about this warranty write:
INTERNATIONAL
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
105072-01
Rev. E
105072 01
09/01
NOT A UPC
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