VENT-FREE NATURAL GAS
RADIANT FLAME® HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
RFN28TD
15,000 to 28,000 Btu/Hr
®
with Thermostat
Shown with Optional
Mantel featuring
Built-in Base
WARNING: Improper installa-
WARNING: If the information in this manual
tion,adjustment,alteration,ser-
is not followed exactly, a fire or explosion
vice, or maintenance can cause
may result causing property damage, per-
injury or property damage. Re-
sonal injury, or loss of life.
fer to this manual for correct
installation and operational
procedures. For assistance or
additionalinformationconsulta
qualified installer, service
agency, or the gas supplier.
— 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 is an unvented
gas-fired heater. It uses air
(oxygen) from the room in
which it is installed. Provisions
for adequate combustion must
be provided. Refer to Air For
Combustion and Ventilation
section on page 5 of this
manual.
• If you cannot reach your gas supplier, call
the fire department.
— Installation and service must be performed
by a qualified installer, service agency, or the
gas supplier.
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohib-
ited by state or local codes.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
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.
Save this manual for future reference.
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OWNER’S MANUAL
Note: Do not remove
Lighting and Warning
Plates from heater
PRODUCT
PRODUCT
FEATURES
Safety Pilot
IDENTIFICATION
Control Knob
Ignitor Button
Lighting and
Warning
This heater has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
TheODS/pilotisarequiredfeatureforvent-
free room heaters. The ODS/pilot shuts off
the heater if there is not enough fresh air.
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Piezo Ignition System
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
Heater
Cabinet
Screen
Thermostatic Heat Control
This heater has a thermostat sensing bulb
and a control valve. This results in the great-
est heater comfort. This can also result in
lower gas bills.
Front
Panel
Log
Figure 1 - Vent-Free Gas Log Natural Gas Space Heater
LOCAL CODES
UNPACKING
1. Remove heater from carton.
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 ANSI Z223.1, also known as
NFPA 54*.
2. Remove all protective packaging ap-
plied to heater for shipment.
3. Make sure your heater includes two
hardware packets.
*Available from:
4. Check heater for any shipping damage.
If heater is damaged, promptly inform
dealer where you bought heater.
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
104779
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS HEATER
Piezo Ignitor
ASSEMBLY
ASSEMBLING HEATER
Ignitor
Cable
Tools Required:
• Phillips screwdriver
• 5/16" hex wrench
• slotted screwdriver
Removing Front Panel Of Heater
1. Remove two screws near bottom cor-
ners of front panel with Phillips screw-
driver.
Figure3-AttachingIgnitorCabletoPiezo
Ignitor
Figure2-RemovingFrontPanelofHeater
2. Pull bottom of front panel forward, then
down (see Figure 2).
Heater Cabinet
Deflector
Log
Installing Log
Note: For easier installation, lay heater on
its back.
Log
Retaining
Brackets
Front Panel
Screen
1. Remove log from inside top of heater.
Discard protective packaging.
2. Attach ignitor cable to piezo ignitor
(see Figure 3).
3. With Phillips screwdriver, remove four
screws holding screen in place. Re-
move screen.
Truss-
Head
Screw
4. Gently slide log between log retaining
brackets on deflector assembly (see Fig-
ure 4). The log should fit firmly against
bottom of log retaining brackets.
Nut
Burner Shield
Brass
Front Trim
Screw
5. Reattach screen using four screws re-
moved in step 3.
Screw
WARNING: Always have
burnershieldandscreeninplace
beforeoperatingheater.Thispre-
ventsexcessivetemperatureson
heater surfaces.
Figure 4 - Assembling Heater
Front Panel
Attaching Brass Front Trim to
Front Panel
Brass Front
Trim
Failure to position the parts in
accordance with these diagrams
or failure to use only parts spe-
cificallyapprovedwiththisheater
mayresultinpropertydamageor
personal injury.
1. Locate brass front trim in brass trim
package.
2. Slide the head of two truss-head screws
from hardware packet into each end of
brass front trim (see Figure 5).
Truss-Head
Screw
Nut
3. Line up screws with holes in front panel
(see Figure 4). Insert screws in holes.
Attach nuts from inside of front panel.
Tighten with wrench.
Figure 5 - Attaching Brass Front Trim to
Front Panel
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OWNER’S MANUAL
buildings of unusually tight construction,
you must provide additional fresh air.
ASSEMBLY
AIR FOR
Continued
COMBUSTION AND
VENTILATION
Unusually tight construction is de-
fined as construction where:
Assembling and Attaching
Brass Trim
1. Remove packaging from remaining
three pieces of brass trim.
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
WARNING: This heater shall
notbeinstalledinaconfinedspace
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.
2. Locate four brass screws, two adjust-
ing plates with set screws, and two
shims in the hardware packet.
b. weather stripping has been
added on openable windows and
doors and
3. Align shim under adjusting plate as
shown in Figure 6.
4. Slide one end of adjusting plate/shim
in slot on mitered edge of top brass trim
(see Figure 6).
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.
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weather strip and caulk around windows and
doorstokeepthecoldairoutandthewarmair
in. During heating months, home owners
want their homes as airtight as possible.
5. Slide other end of adjusting plate/shim
in slot on mitered edge of side brass
trim (see Figure 6).
6. While firmly holding edges of brass
trim together, tighten both set screws
on the adjusting plate with slotted
screwdriver.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors, page 7.
While it is good to make your home energy
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.
7. Repeat steps 1 through 6 for other side.
8. Place the assembled trim on front of
heater cabinet. Attach on top and sides
with four brass screws included in hard-
ware package (see Figure 7).
If your home does not meet all of the
threecriteriaabove,proceedtoDeter-
mining Fresh-Air Flow for Heater Lo-
cation, page 6.
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.
9. Reattach front panel to heater if you are
going to mount the heater to the base.
Do not reattach front panel at this time
if you are going to mount heater to wall.
Confined and Unconfined Space
The National Fuel Gas Code (ANSI Z223.1,
1992 Section 5.3) 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 aggregate input rating of all
appliances installed in that space and an
unconfining 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
inputratingofallappliancesinstalledinthat
space. Rooms communicating directly with
the space in which the appliances are in-
stalled*, through openings not furnished
with doors, are considered a part of the
unconfined space.
Set Screws
Top
Side Brass
Brass
PROVIDING ADEQUATE
VENTILATION
Adjusting
Trim
Trim
Plate
The following is excerpts from National
Fuel Gas Code. NFPA 54/ANSI Z223.1,
Section 5.3, Air for Combustion and Venti-
lation.
Shim
Slot
Mitered Edge
Slot
All spaces in homes fall into one of the three
following ventilation classifications:
Figure 6 - Assembling Brass Trim
Screws
1. Unusually Tight Construction
2. Unconfined Space
3. Confined 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.
The information on pages 5 through 7 will
help you classify your space and provide
adequate ventilation.
Assembled
Brass Trim
Unusually Tight Construction
* Adjoining rooms are communicating only
iftherearedoorlesspassagewaysorventila-
tion grills between them.
The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
Figure 7 - Attaching Brass Trim to Heater
Continued
104779
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS HEATER
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet 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 +
30,000
28,000
58,000
Btu/Hr
Btu/Hr
Btu/Hr
Vented gas heater
Gas fireplace logs
Total
=
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)
58,000 Btu/Hr (actual amount of Btu/Hr used)
The space in the above example is a confinedspace because the actual Btu/Hr used is more than the maximum Btu/Hr the space 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 7.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.
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, ANSI Z223.1, 1992, Section 5.3 or applicable local codes.
104779
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OWNER’S MANUAL
AIR FOR
COMBUSTION AND
12"
VENTILATION
Continued
VENTILATION AIR
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
into Adjoining
Room,
Ventilation Air From Inside
Building
Or
Remove
Door into
Adjoining
Room,
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 8). You can also
remove door into adjoining room (see op-
tion 3, Figure 8). Follow the National Fuel
Gas Code NFPA 54/ANSI Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
Option 1
Option 3
12"
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.
Figure 8 - Ventilation Air from Inside Building
Ventilated
Attic
Outlet
Air
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/ANSI
Z223.1, Section 5.3, Air for Combustion
and Ventilation for required size of ventila-
tion grills or ducts.
Outlet
Air
To Attic
To
Crawl
Space
Inlet
Air
IMPORTANT: Do not provide openings for
inletoroutletairintoatticifattichasathermo-
stat-controlled power vent. Heated air enter-
ing the attic will activate the power vent.
Ventilated
Crawl Space
Inlet Air
Figure 9 - Ventilation Air from Outdoors
104779
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS HEATER
IMPORTANT: Vent-free heaters add mois-
LOCATING HEATER
INSTALLATION
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 5 through 7.
WARNING:Maintainthemini-
mumclearancesshowninFigure
10. If you can, provide greater
clearancesfromfloor,ceiling,and
joining wall.
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.
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches above
floor.
You can locate heater on floor. The optional
hearth base is needed. You can also install
the optional decorative mantel on the heater
(some mantels require hearth base).
IMPORTANT: Only use optional mantel
and hearth base specified in this manual.
Purchase the optional mantel and hearth
base from your dealer. See Accessories,
page 21.
• locateheaterwheremovingve-
hicle will not hit it.
Forconvenienceandefficiency,installheater
• where there is easy access for operation,
inspection, and service.
NOTICE: A qualified service per-
son must install heater. Follow
all local codes.
The heater may also be mounted on a wall.
Youcannotuseoptionalmantelifmounting
heater on a wall.
• in coldest part of room.
An optional fan kit is available from your
dealer. See Accessories, page 21. If plan-
ning to use fan, locate heater near an electri-
cal outlet.
CHECK GAS TYPE
WARNING: Never install the
heater
Use only natural gas. If your gas supply is
not natural gas, do not install heater. Call
dealer where you bought heater for proper
type heater.
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objectsarelessthan36inches
from the front, top, or sides of
the heater
CEILING
36"
Minimum
INSTALLATION ITEMS
6"
Minimum
From
Sides Of
Heater
Beforeinstallingheater,makesureyouhave
the items listed below.
• as a fireplace insert
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• ground joint union
• test gauge connection *
• sediment trap
• in high traffic areas
• in windy or drafty areas
Left
Side
Right
Side
Minimum To
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as to-
bacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls.
5" TopSurface
Of Carpeting,
FLOOR
Tile or Other
• tee joint
• pipe wrench
Combustible
Material
Figure 10 - Mounting Clearances As
Viewed From Front of Heater
* AnA.G.A.design-certifiedmanualshutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 21.
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OWNER’S MANUAL
Marking Screw Locations
INSTALLATION OPTIONS
INSTALLATION
1. Tape mounting bracket to wall where
heater will be located. Make sure
mounting bracket is level.
Continued
There are three options for mounting this
heater.
THERMOSTAT SENSING
BULB
A. Mounting heater to wall
B. Mounting heater to optional hearth base
WARNING:Maintainminimum
clearances shown in Figure 13. If
you can, provide greater clear-
ancesfromfloorandjoiningwall.
The thermostat sensing bulb has been placed
insidetheheaterforprotectionduringshipping.
C. Mounting heater with optional hearth
base to optional mantel
Locating Thermostat Sensing
Bulb
1. Remove front panel of heater (see Fig-
ure 2, page 4).
A. MOUNTING HEATER TO
WALL
2. Mark screw locations on wall (see Fig-
ure 13).
Mounting Bracket
Note: Only mark last hole on each end
of mounting bracket. Insert mounting
screws through these holes only.
2. Locate thermostat sensing bulb just
under burner assembly.
The mounting bracket is located on back
panel of heater. It has been taped there for
shipping. Remove mounting bracket from
back panel.
IMPORTANT: Attach thermostat sensing
bulb to back of heater for proper operation.
3. Remove tape and mounting bracket
from wall.
Attaching Thermostat Sensing
Bulb
11"
Min.
16"
1. Remove thermostat sensing bulb from
holders inside heater. Route through
slot opening in bottom of heater.
Only Insert Mounting
Screws Through Last
Hole On Each End
20 3/4"
Min.
Mounting
Bracket
2. Place clamp on thermostat sensing bulb
as shown in Figure 11. Clamp is pro-
vided in hardware package.
AjdoingWal
Figure 12 - Mounting Bracket Location
Methods For Attaching
Mounting Bracket To Wall
Floor
3. Snap clamp into upper mounting hole
as shown in Figure 11. Mounting hole
is located on lower left edge on back
of heater. Make sure the thermostat
sensing bulb is pointing up.
Figure13-MountingBracketClearances
Only use last hole on each end of mounting
bracket to attach bracket to wall. These two
holes are 16 inches apart from their centers.
Attach mounting bracket to wall in one of
two ways.
Thermostat
Sensing Bulb
1. Attaching to wall stud
2. Attaching to wall anchor
Clamp
Attaching to wall studThis method pro-
vides the strongest hold. Insert mounting
screws through mounting bracket and into
wall studs.
Attaching to wall anchor This method
allows you to attach mounting bracket to
hollow walls (wall areas between studs) or
to solid walls (concrete or masonry).
Figure11-AttachingThermostatSensing
Bulb
Decidewhichmethodbettersuitsyourneeds.
Eithermethodwillprovideasecureholdfor
the mounting bracket.
Continued
104779
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS HEATER
8. Tighten both screws until heater is
INSTALLATION
firmly secured to wall. Do not over
tighten.
Continued
Note: Do not replace front panel at this
time. Replace front panel after making
gas connections and checking for leaks
(see pages 12 and 13).
Attaching Mounting Bracket To
Wall
Figure 15 - Popping Open Anchor Wings
For Thin Walls
Note: Wall anchors, mounting screws, and
spacers are in hardware package. The hard-
ware package is provided with heater.
Placing Heater On Mounting
Bracket
Attaching to wall stud method
Forattachingmountingbrackettowallstuds
1. Locate two horizontal slots on back
panel of heater.
1. Drill holes at marked locations using
9/64" drill bit.
2. Place heater onto mounting bracket.
Slide horizontal slots onto stand-out
tabs on mounting bracket.
2. Place mounting bracket onto wall. Line
up last hole on each end of bracket with
holes drilled in wall.
Figure 17 - Installing Bottom Mounting
Screws
Horizontal Slots
3. Insert mounting screws through bracket
and into wall studs.
B. MOUNTING HEATER ON
OPTIONAL HEARTH BASE
4. Tighten screws until mounting bracket
is firmly fastened to wall studs.
Tools needed
Attaching to wall anchor method
• #2 Phillips screwdriver
• Slotted screwdriver
For attaching mounting bracket to hollow
walls (wall areas between studs) or solid
walls (concrete or masonry)
• Electric drill (if securing base to floor)
Mounting Bracket
(attached to wall)
Stand-Out Tab
The optional hearth base kit includes the
following:
1. Drill holes at marked locations using
5/16" drill bit. For solid walls (concrete
or masonry), drill at least 1" deep.
Figure 16 - Mounting Heater Onto
Mounting Bracket
• Hearth base
• 4 wood screws
• 4 sheet metal screws
• Brass base trim
• Hearth insert
2. Fold wall anchor as shown in Figure 14.
Installing Bottom Mounting
Screws
1. Locate two bottom mounting holes.
These holes are near bottom on back
panel of heater (see Figure 17).
3. Insert wall anchor (wings first) into
hole. Tap anchor flush to wall.
4. For thin walls (1/2" or less), insert red
key into wall anchor. Push red key to
“pop” open anchor wings.
• 4 anchors
• Laminate sheet & adhesive
• 2 brass screws
2. Mark screw locations on wall.
IMPORTANT: Do not hammer key!
For thick walls (over 1/2" thick) or solid
walls, do not pop open wings.
3. Remove heater from mounting bracket.
Note: It is an option to secure GHB802A
model hearth base to floor. You must secure
the GHB802B, GHB802C, or GHB38 se-
ries model hearth base to floor. To secure
hearth base to floor, follow instructions un-
der Securing Hearth Base to Floor, below.
If not securing hearth base to floor, proceed
to Mounting Heater to Optional Hearth
Base, page 11.
4. If installing bottom mounting screws
into hollow or solid wall, install wall
anchors. Follow steps 1 through 4 un-
der Attaching To Wall Anchor Method.
If installing bottom mounting screw
into wall stud, drill holes at marked lo-
cations using 9/64" drill bit.
5. Place mounting bracket onto wall. Line
up last hole on each end of bracket with
wall anchors.
6. Insert mounting screws through bracket
and into wall anchors.
7. Tighten screws until mounting bracket
is firmly fastened to wall.
5. Replace heater onto mounting bracket.
6. Place spacers between bottom mount-
ing holes and wall anchor or drilled hole.
7. Hold spacer in place with one hand.
With other hand, insert mounting screw
through bottom mounting hole and
spacer. Place tip of screw in opening
of wall anchor or drilled hole.
Figure 14 - Folding Anchor
104779
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OWNER’S MANUAL
Bottom of Heater
C. MOUNTING HEATER WITH
OPTIONAL HEARTH BASE (IF
APPLICABLE) TO OPTIONAL
MANTEL
See instructions included with
mantel kit.
Shipping
Screw
INSTALLATION
Base
Continued
Securing Hearth Base to Floor
1. Position hearth base in desired location.
Mark holes for drilling (see Figure 18).
Remove hearth base.
Assembling Mantel
2. For carpeted floor, make a small cut
with a sharp knife at marked loca-
tions before drilling. If securing to a
wood floor, drill a 3/4" deep hole
using a 1/8" diameter drill bit. Do
not use anchors in wood floors. If
securing to a concrete floor, drill a 1
3/8" deep hole using a 1/4" diameter
concrete drill bit. Completely insert
anchors into each hole.
IMPORTANT: Only use the optional man-
tels specified in this manual. See Accesso-
ries, page 21 for proper mantel kits. This
heater is only approved for use with models
GMF800 series / GMU801 series, GM900F
series/GM901Useries,GM700F/GM701U
series, GMC22F/GMC23U/GMC24U se-
ries, GMC32F/GMC33U series, GMC34F/
GMC35U series, and GMC26F/GMC27U/
GMC28Fseriesmantelkits.Usinganyother
mantel will void the A.G.A. approval for
this heater. Do not use models GMF800/
GMU801series,GM900F/GM901Useries,
GM700F/GM701U series, GMC22F/
GMC23U/GMC24U series, GMC32F/
GMC33U series, GMC26F/GMC27U/
GMC28F series and GMC34F/GMC35U
series mantels with any other product. If the
metal base is required with your mantel, the
heater must be mounted on the base first.
Mounting Holes
Sheet Metal Screw
Holes for Securing
Heater to Floor
Figure 18 - Attaching Heater to Hearth
Base
Laminate
Sheet
3. Mount heater to hearth base following
steps under Mounting Heater to Op-
tional Hearth Base, below. After
mounting heater, position heater and
hearth base over drilled holes. With
slotted screwdriver, secure hearth base
to floor with four wood screws.
Hearth
Insert
Screw
Mounting Heater to Optional
Hearth Base
1. Lay heater on its back on a table with
the bottom of heater overhanging the
edge of the table.
Brass Base
Trim
2. Remove 2 shipping screws in bottom
of heater. Discard shipping screws.
Figure19-PlacingHearthInsertonHeater
Base and Attaching Brass Base Trim
3. Line up mounting holes on top of hearth
base with holes in bottom of heater (see
Figure 18).
4. Using a Phillips screwdriver, secure
hearth base to heater with four sheet
metal screws (see Figure 18).
5. Stand heater up on base.
6. Place hearth insert in hearth base as
shown in Figure 19.
7. Assemble brass trim (see steps 1
through 7 under Assembling and At-
taching Brass Trim, page 5).
8. Slide base trim on heater base. Attach
brass trim to base with two brass screws
included as shown in Figure 19.
Continued
104779
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS HEATER
Installsedimenttrapinsupplylineasshown trap is not installed or is installed wrong,
in Figure 20, below. Locate sediment trap heater may not run properly.
INSTALLATION
Continued
where it is within reach for cleaning. 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
IMPORTANT: Hold pressure regulator
with wrench when connecting it to gas pip-
ing and/or fittings.
CONNECTING TO GAS
SUPPLY
NOTICE: A qualified service per-
son must connect heater to gas
supply. Follow all local codes.
Note: Burner bracket
not shown for clarity
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
Pressure
Regulator
3/8" NPT
Pipe Nipple
IMPORTANT: Check gas line pressure be-
fore connecting heater to gas line. Gas line
pressure must be no greater than 14 inches
of water. If gas line pressure is higher,
heater regulator damage could occur.
Heater
Cabinet
Ground
Union
Joint
Tee Joint
CAUTION : Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes. Usepipeof1/2"
or greater diameter to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
Manual Shutoff Valve *
Reducer
Bushing to
1/8" NPT
Test
Gauge
Connection *
From Gas Meter
(5" W.C. to 10.5"
W.C. Pressure)
1/8" NPT
Plug Tap
Tee Joint
Pipe Nipple
Cap
Sediment
Trap
3" Minimum
Installation must include a manual shutoff
valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
heater (see Figure 20).
Figure 20 - Gas Connection
* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual
shutoff valve from your dealer. See Accessories, page 21.
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.
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
104779
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OWNER’S MANUAL
Pressure Testing Heater Gas
Connections
1. Open manual shutoff valve (see Fig-
ure 21).
INSTALLATION
OPERATING
HEATER
Continued
CHECKING GAS
CONNECTIONS
FOR YOUR SAFETY
2. Open main gas valve located on or near
gas meter.
READ BEFORE
LIGHTING
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
3. Make sure control knob of heater is in
the OFF position.
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
4. Check all joints from manual shutoff
valve to thermostat gas valve (see Fig-
ure 22). Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing 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.
5. Correct all leaks at once.
A. This appliance has a pilot which must
be lighted by hand. When lighting the
pilot, follow these instructions exactly.
6. Light heater (see Operating Heater).
Check all other internal joints for leaks.
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.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 14).
Pressure Testing Gas Supply
Piping System
8. Replace front panel.
TestPressuresInExcessOf1/2PSIG
WHAT TO DO IF YOU SMELL
GAS
1. Disconnect heater and its individual
manual shutoff valve from gas supply
piping system. Pressures in excess of
1/2 psig will damage heater regulator.
Open
Manual
Shutoff
Valve
• 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.
2. Cap off open end of gas pipe where
manual shutoff valve was connected.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
Closed
Figure 21 - Manual Shutoff Valve
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.
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.
Thermostat Gas
Valve Location
5. Correct all leaks at once.
TestPressuresEqualToorLessThan
1/2 PSIG
Gas Meter
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.
1. Close manual shutoff valve (see Fig-
ure 21).
2. Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
Manual
Shutoff
Valve
3. Check all joints from gas meter to manual
shutoff valve (see Figure 22).Apply mix-
ture of liquid soap and water to gas joints.
Bubbles forming show a leak.
Figure 22 - Checking Gas Joints
4. Correct all leaks at once.
Continued
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS HEATER
7. Keep control knob pressed in for 30
THERMOSTAT
CONTROL
OPERATION
OPERATING
seconds after lighting pilot. After 30
seconds, release control knob.
• If control knob does not pop up
when released, contact a qualified
service person or gas supplier for
repairs.
HEATER
Continued
The thermostatic control used on this
heaterdiffersfromstandardthermostats.
Standardthermostatssimplyturnonand
off the burner. The thermostat used on
this heater senses the room temperature.
Thethermostatadjuststheamountofgas
flow to the burner. This increases or de-
creases the burner flame height. At times
the room may exceed the set tempera-
ture. If so, the burner will shut off. The
burner will cycle back on when room
temperature drops below the set tem-
perature.
LIGHTING
INSTRUCTIONS
Note: If pilot goes out, repeat steps
3 through 7. This heater has a safety
interlock system. Wait one (1) minute
before lighting pilot again.
1. STOP! Read the safety information
on page 13, column 3.
2. Make sure manual shutoff valve is
fully open.
8. Turn control knob counterclockwise
3. Turn control knob clockwise
to the OFF position.
Ignitor Button
Control Knob
Clockwise
to desired heating level. The
C-clockwise
main burner should light. Set control
knob to any heat level between HI
and LO.
LO
The control knob can be set to any heat
level between HI and LO.
P I L O T
O F F
H I
CAUTION:Donottrytoadjust
heating levels by using the
manual shutoff valve.
IGNITOR
Note: The thermostat sensing bulb mea-
sures the temperature of air near the
heatercabinet.Thismaynotalwaysagree
with room temperature (depending on
housing construction, installation loca-
tion, room size, open air temperatures,
etc.). Frequent use of your heater will let
you determine your own comfort levels.
Ignitor Electrode
Figure 23 - Control Knob In The OFF
Position
Thermocouple
Pilot Burner
4. Wait five (5) minutes to clear out any
gas.Then smell for gas, including near
the floor. If you smell gas, STOP! Fol-
low “B” in the safety information on
page 13, column 3. If you don’t smell
gas, go to the next step.
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 2,
page 4).
5. Turn control knob counterclockwise
to the PILOT position. Press
C-clockwise
Figure 24 - Pilot
in control knob for five (5) seconds
(see Figure 23).
2. Follow steps 1 through 5 under
Lighting Instructions.
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.
3. With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
4. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
Clockwise
to the OFF position.
6. With control knob pressed in, push
down and release ignitor button. This
will light pilot. The pilot is attached
to the front of burner. If needed, keep
pressing ignitor button until pilot
lights.
5. Replace front panel.
2. Turn off all electric power to the ap-
pliance if service is to be performed.
Shutting Off Burner Only (pilot
stays lit)
Turn control knob clockwise
the PILOT position.
to
Clockwise
Note: If pilot does not stay lit, refer
to Troubleshooting, pages 16 through
18. Also contact a qualified service
person or gas supplier for repairs.
Until repairs are made, light pilot
with match. To light pilot with match,
see Manual Lighting Procedure.
104779
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OWNER’S MANUAL
BURNER FLAME PATTERN
INSPECTING
BURNER
CLEANING AND
MAINTENANCE
Figure 27 shows a correct burner flame
pattern.Figure28showsanincorrectburner
flame pattern. The incorrect burner flame
patternshowsyellowtippingoftheflame. It
also shows the flame higher than one inch
above the log.
Check pilot flame pattern and burner flame
pattern often.
WARNING: Turn off heater
and let cool before cleaning.
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.
Note: When using the heater the first time,
the flame will be yellow for approximately
one hour until the log cures.
CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heaterinspectedyearlybyaquali-
fied service person. Heater may
needmorefrequentcleaningdue
to excessive lint from carpeting,
pet hair, etc.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If burner flame pat-
tern shows yellow tipping, follow
instructions at bottom of this
page.
If pilot flame pattern is incorrect, as shown
in Figure 26
• turn heater off (see To Turn Off Gas to
Appliance, page 14)
ODS/PILOT AND BURNER
• see Troubleshooting, pages 16 through 18
• Use a vacuum cleaner, pressurized air,
or small, soft bristled brush to clean.
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles enter the
heater and burn causing brief
patches of orange flame.
Pilot Burner
Thermocouple
CABINET
Air Passageways
• Use a vacuum cleaner or pressurized air
to clean.
Ifburnerflamepatternisincorrect,asshown
in Figure 28
Exterior
Good Pilot-Nat. Port GRH/OV 007D
Figure 25 - Correct Pilot Flame Pattern
• turn heater off (see To Turn Off Gas to
Appliance, page 14)
• Use a soft cloth dampened with a mild
soap and water mixture. Wipe the cabi-
net to remove dust.
• see Troubleshooting, pages 16 through 18
Top of Flame About
Thermocouple
Pilot Burner
One Inch Above Logs
Bad Pilot-Nat. Port
GRH/OV 007E
Figure 26 - Incorrect Pilot Flame Pattern
CORRECT FLAME PATTERN
AT HIGH POSITION
Figure 27 - Correct Burner Flame Pattern
Yellow Tipping
INCORRECT FLAME PATTERN
AT HIGH POSITION
Figure28-IncorrectBurnerFlamePattern
104779
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS 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,
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 cable pinched or wet
spark at ODS/pilot
1. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
2. Ignitor electrode not connected to igni- 2. Reconnect ignitor cable
tor cable
3. Piezo ignitor nut is loose
3. Tighten nut holding piezo ignitor to base
panel of log set. Nut is located behind
base panel.
4. Broken ignitor cable
5. Ignitor electrode broken
6. Bad piezo ignitor
4. Replace ignitor cable
5. Replace ignitor
6. Replace piezo ignitor
7. Ignitor electrode positioned wrong
7. Replace ignitor
When ignitor button is pressed, there is 1. Gas supply turned off or manual shutoff 1. Turn on gas supply or open manual
spark at ODS/pilot but no ignition
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 15) or replace ODS/
pilot assembly
6. Gas regulator setting is not correct
6. Replace gas regulator
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. Safety interlock system has been 3. Wait one minute for safety interlock sys-
triggered
tem to reset. Repeat ignition operation
4. Fully open manual shut-off valve
4. Manual shutoff valve not fully open
5. Thermocouple connection loose at con- 5. Hand tighten until snug, then tighten
trol valve 1/4 turn more
6. Pilot flame not touching thermocouple, 6. 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 15) or replace ODS/
pilot assembly
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
7. Thermocouple damaged
8. Control valve damaged
7. Replace thermocouple
8. Replace control valve
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OWNER’S MANUAL
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Burner does not light after ODS/pilot is lit
1. Burner orifice is clogged
1. Clean burner (see Cleaning and Mainte-
nance, page 15) or replace burner orifice
2. Burner orifice diameter is too small
3. Inlet gas pressure is too low
2. Replace burner orifice
3. Contact local natural gas company
Delayed ignition of burner
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Contact local natural gas company
2. Clean burner (see Cleaning and Mainte-
nance, page 15) or replace burner orifice
Burner backfiring during combustion
1. Burner orifice is clogged or damaged
1. Clean burner (see Cleaning and Mainte-
nance, page 15) or replace burner orifice
2. Replace burner
2. Burner damaged
3. Gas regulator defective
3. Replace gas regulator
Yellow flame during burner combustion
1. Not enough air
1. Check burner for dirt and debris. If
found, clean burner (see Cleaning and
Maintenance, page 15)
2. Gas regulator defective
2. Replace gas regulator
Slight smoke or odor during initial operation 1. Residues from manufacturing processes 1. Problem will stop after a few hours of
operation
Heater produces a whistling noise when 1. Turning control knob to HI position 1. Turn control knob to LO position and
burner is lit
when burner is cold
2. Air in gas line
let warm up for a minute
2. Operate burner until air is removed from
line. Have gas line checked by local
natural gas company
3. Air passageways on heater blocked
3. Observe minimum installation clear-
ances (see Figure 10, page 8)
4. Dirty or partially clogged burner orifice 4. Clean burner (see Cleaning and Mainte-
nance, page 15) or replace burner orifice
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
white powder residue.
polish, wax, carpet cleaners, or similar
products.
Continued
104779
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS 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.
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 burner is 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. Ventilate room. Stop using odor caus-
spray, glues, etc. (see IMPORTANT
ing products while heater is running
statement above)
2. Gas leak. SeeWarning statement at 2. Locate and correct all leaks (see Check-
top of page
ing Gas Connections, page 13)
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 15)
Gas odor even when control knob is in OFF 1. Gas leak. SeeWarning statement at 1. Locate and correct all leaks (see Check-
position
top of page
ing Gas Connections, page 13)
2. Control valve defective
2. Replace control valve
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. SeeWarning statement at 2. Locate and correct all leaks (see Check-
top of page ing Gas Connections, page 13)
Moisture/condensationnoticedonwindows
1. Not enough combustion/ventilation air. 1. Refer to Air for Combustion and Venti-
lation requirements (page 5)
104779
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OWNER’S MANUAL
SPECIFICATIONS
REPLACEMENT
PARTS
BTU (Variable)
Type Gas
15,000/28,000
Natural Only
Piezo
Note: Use only original replacement parts.
This will protect your warranty coverage
for parts replaced under warranty.
Ignition
Pressure Regulator Setting
Inlet Gas Pressure (in. of water) *
Maximum
Minimum
Dimensions, Inches (H x W x D)
Heater
Carton
Weight (pounds)
Heater
3" W.C.
10.5"
5"
Parts Under Warranty
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), either contact your nearest Parts
Central (see page 20) or call DESA
International’s Technical Service Depart-
ment at 1-800-323-5190.
23.75 x 25.9 x 8.5
26 x 27.75 x 10.25
29
35
Shipping
When calling DESA International, have
ready:
* For purposes of input adjustment
• your name
• your address
• model number of your heater
TECHNICAL
SERVICE
SERVICE HINTS
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
When gas pressure is too low
• pilot will not stay lit
You may have further questions about in-
stallation, operation, or troubleshooting.
• burner will have delayed ignition
• heater will not produce specified heat
Usually, wewillaskyoutoreturnthedefec-
tive part to the factory.
If so, contact DESA International’s Techni-
cal Service Department at 1-800-323-5190.
When gas quality is bad
• pilot will not stay lit
Parts Not Under Warranty
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s), either contact your nearest Parts
Central (see page 20) or call DESA
International’s Parts Department at 1-800-
972-7879 for referral information.
• burner will produce flames and soot
• heater will backfire when lit
Youmayfeelyourgaspressureistoolowor
gas quality is bad. If so, contact your local
natural gas supplier.
When calling DESA International, have
ready:
• model number of your heater
• the replacement part number
104779
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS HEATER
These Parts Centrals are privately-owned businesses. They have agreed to support our
customer’s needs by providing original replacement parts and accessories.
PARTS CENTRALS
Baltimore Electric
1348 Dixwell Avenue
Hamden, CT 06514
1-800-397-7553
Master Parts Distributors
1184 Wilson Ave. NW
Grand Rapids, MI 49504
616-791-8270
Dayton Hardware
P.O. Box 275
North Dayton Station
Dayton, OH 45404
All States
203-248-7553
1-800-446-1446
Parts Department
937-258-3721
OH 1-800-762-3426
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108
KS, MO, AR
Portable Heater Parts
342 N. County Rd. 400 East
Valparaiso, IN 46383
All States
219-462-7441
1-800-362-6951
Halco Enterprises
208 Carter Drive, Unit 21
West Chester, PA 19382
610-430-7717
816-842-3911
East Coast Energy Products
707 Broadway
1-800-368-0803
FBD
W. Long Branch, NJ 07764
732-870-8809
1-800-755-8809
LA Porte’s Parts & Service
2444 North 5th Street
Hartsville, SC 29550
803-332-0191
1349 Adams St.
Bowling Green, KY 42103
502-846-1199
Tarantin Tank Co.
P.O. Box 6129
1-800-654-8534
Parts Department
Four Flags Power Products
1115 Stateline Road
Niles, MI 49120
616-684-2697
1-800-268-4983
Freehold, NJ 07728
908-780-9340
1-800-922-0724
Cans Unlimited, Inc.
P.O. Box 645
Taylor, SC 29687
All States
803-879-3009
1-800-845-5301
Heater & Fireplace Store
1922 N. Route 9
Cape May Court, NJ 08210
Parts Only
609-624-0678
104779
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OWNER’S MANUAL
ACCESSORIES
Purchasetheseheateraccessoriesfromyour
local dealer. If they can not supply these
accessories,eithercontactyournearestParts
Central (see page 20) or call DESA
International’s Sales Department at 1-800-
458-2472 for information. You can also
write to the address listed on the back page
of this manual.
HEARTH BASE - GHB38
Series
PRESTIGE MANTEL
Finished - GMC22F Series
MANUAL SHUTOFF VALVE -
GA5010
For locating heater on the floor. Includes
brass trim. Complete installation instruc-
tions included.
For use with heater and hearth base. Sturdy
hardwood construction embellished with
fluted sides and bullet medallions. Avail-
able in a walnut finish. Complete assembly
and installation instructions included.
Manual shutoff valve with 1/8" NPT tap.
FAN KIT
GA3100A - Manually Controlled
or GA3200TA - Thermostatically
Controlled
Provides better heat distribution. Makes
heater more efficient. Complete installation
and operating instructions included.
PRESTIGE MANTEL
WITH BUILT-IN BASE
Unfinished - GMC27U Series
Finished - GMC26F Series
Finished Oak - GMC28F
CORNER MANTEL
Unfinished - GMC35U Series
Finished - GMC34F Series
For use with heater. Features built-in base,
sturdy hardwood construction with classic
styling and attractive molding. Available in
light oak finish, walnut finish, or an unfin-
ished hardwood, ready to stain or paint.
Completeassemblyandinstallationinstruc-
tions included.
For use with heater. Features built-in base.
Space-savingcornerdesignfeaturingclean,
classic lines. Available in a walnut finish or
an unfinished hardwood, ready to stain or
paint. Complete assembly and installation
instructions included.
104779
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15,000 TO 28,000 BTU/HR
VENT-FREE NATURAL GAS HEATER
ILLUSTRATED
PARTS
22
BREAKDOWN
20
23
RFN28TD
21
7
8
10
26
13
19
12
5
14
6
9
16
10
11
25
24
17
1
3
4
15
18
2
1
12-1
12-2
1
104779
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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 19 of this manual.
PARTS LIST
RFN28TD
KEY
NO.
PART
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
8
098304-01
100566-01CK
100573-01BR
100568-02BR
100903-04
M11084-38
099066-01
M11084-26
100571-03BR
098271-03
098249-01
099440-05
098514-01
098594-01
103447-01
098517-01
103845-07
103408-01
099415-07
103255-01
103256-01
103837-03
098522-12
103502-01
097159-04
098304-03
101046-01
NJF-8C
Screw, #10 x 3/8"
Front Panel
Screen Assembly
Burner Shield
Log
Screw, #8 x 3/8"
Mounting Bracket
Screw, #10 x 3/8"
Deflector Unit
Ignitor Cable
6
1
1
1
1
2
1
8
1
1
2
1
1
1
1
1
1
2
1
1
1
1
1
1
1
5
2
1
9
10
11
12
12-1
12-2
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Nut, M5
ODS/Pilot Assembly
Thermocouple
Ignitor Electrode
Burner
3/16" Pilot Tubing
Injector
Burner Bracket
Pressure Regulator
3/8" Outlet (Burner) Tubing
3/8" Inlet Tubing
Bracket Support
Thermostat Gas Valve
Cabinet
Piezo Ignitor
Screw, #8 x 3/8"
Log Strap
Nut, Hex
PARTS AVAILABLE — NOT SHOWN
100562-01
Lighting Instructions Plate
Warning Plate
Brass Trim Assembly
Hardware Package
Brass Trim Hardware
Warning Plate
1
1
1
1
1
1
1
100563-01
101899-01
100642-01
100769-02
100563-01
101416-29
Instructional Video
104779
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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
COMFORT GLOW VENT-FREE NATURAL GAS COMPACT FIREPLACE
DESA International warrants this product to be free from defects in materials and components for two (2) years from the date
offirstpurchase,providedthattheproducthasbeenproperlyinstalled,operatedandmaintainedinaccordancewithallapplicable
instructions. 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 only the cost of part(s) required to restore
this heater to proper operating condition. 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.
Thiswarrantydoesnotapplytopartsthatarenotinoriginalconditionbecauseofnormalwearandtear,orpartsthatfailorbecome
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.
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE
PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND
LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MER-
CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO (2) YEARS 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:
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
104779-01
REV. A
5/98
104779 01
NOT A UPC
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