tenance can cause injury
or property damage. Refer
to this manual for correct
installation and operational procedures. For assis-
tance or additional infor-
mation consult a qualied
installer, service agency
or the gas supplier.
WARNING: This ap-
pliance is for installation
only in a solid-fuel burning
masonry or UL127 fac-
tory-built fireplace or in
a listed ventless rebox
enclosure. It is design-certied for these installations
in accordance with ANSI
Z21.11.2. Exception: Do not
install this appliance in a
factory-built replace that
includes instructions stat-
ing it has not been tested
or should not be used with
unvented gas logs.
WARNING: This is an
unvented gas-red 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 6
of this manual.
This appliance may be in-
stalled in an aftermarket,*
perma n ently locat e d,
manufactured (mobile)
home, where not prohibited by local codes.
This appliance is only for
use with the type of gas
indicated on the rating
plate. This appliance is
not convertible for use
with other gases.
* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer
www.desatech.com
120890-01D2
SAFETY
Continued
WARNING: This product
con tains an d/or gen erates
chemicals known to the State
of California to cause cancer or
birth defects or other reproductive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate or service this replace.
Improper use of this replace
can cause serious injury or
death from burns, re, explosion, electrical shock and carbon
monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs
of carbon monoxide poisoning resemble the
u, with headaches, dizziness or nausea. If
you have these signs, the replace may not
be working properly. Get fresh air at once!
Have replace serviced. Some people are
more affected by carbon monoxide than oth-
ers. These include pregnant women, people
with heart or lung disease or anemia, those
under the inuence of alcohol and those at
high altitudes.
Natural and Propane/LP Gas: Natural and
propane/LP gases are odorless. An odor-making agent is added to these gases. The odor
helps you detect a gas leak. However, the
odor added to the gas can fade. Gas may be
present even though no odor exists.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this replace.
WARNING: Any change to
this heater or its controls can
be dangerous.
WARNING: Do not use a
blower insert, heat exchanger
insert or other accessory not approved for use with this heater.
WARNING: Do not allow fans
to blow directly into the replace.
Avoid any drafts that alter burner
ame patterns. Ceiling fans can
create drafts that alter burner
ame patterns. Altered burner
patterns can cause sooting.
Due to high temperatures, the
appliance should be located out
of trafc and away from furniture
and draperies.
Do not place clothing or other
ammable material on or near
the appliance. Never place any
objects on the heater.
Heater base assembly becomes
very hot when running heater.
Keep children and adults away
from hot surface to avoid burns
or clothing ignition. Heater
will remain hot for a time after
shutdown. Allow surface to cool
before touching.
Carefully supervise young chil-
dren when they are in the room
with heater.
You must operate this heater
with a replace screen in place.
Make sure replace screen is
closed before running heater.
Keep the appliance area clear
and free from combustible materials, gasoline and other ammable vapors and liquids.
120890-01D3
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SAFETY
Continued
1. This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors (propane/LP units
only).
3. To prevent performance problems, the
use of a propane/LP tank of less than
100 lbs. capacity is not recommended
(propane/LP units only).
4. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do not
use any phone in your building
• immediately call your gas supplier from
a neighbor ’s phone. Follow the gas
supplier’s instructions
• if you cannot reach your gas supplier,
call the re department
5. This heater shall not be installed in a
bedroom or bathroom.
6. Do not burn solid-fuel in a masonry or
UL127 factory-built replace in which a
vent-free room heater is installed.
7. Before installing in a solid fuel burning replace, the chimney ue and rebox must
be cleaned of soot, creosote, ashes and
loose paint by a qualied chimney cleaner.
Creosote will ignite if highly heated. A dirty
chimney ue may create and distribute
soot within the house. Inspect chimney
ue and rebox for damage. If damaged,
repair ue before operating heater.
8. If replace has glass doors, never operate
this heater with glass doors closed. If you
operate heater with doors closed, heat
buildup inside replace will cause glass to
burst. Make sure there are no obstructions
across openings of replace.
9. This log heater is designed to be smoke-
less. If logs ever appear to smoke, turn off
heater and call a qualied service person.
Note: During initial operation, slight smoking could occur due to log curing and
heater burning manufacturing residues.
10. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 18.
11. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater off. If
heated, the vapors from these products may
create a white powder residue within burner
box or on adjacent walls or furniture.
12. This heater needs fresh, outside air ven-
tilation to run properly. This heater has an
Oxygen Depletion Sensing (ODS) safety
shutoff system. The ODS shuts down the
heater if not enough fresh air is available.
See Air for Combustion and Ventilation,
page 6. If heater keeps shutting off, see
Troubleshooting, page 20.
13. Do not run heater
• where ammable liquids or vapors are
used or stored
• under dusty conditions
14. Do not use this heater to cook food or burn
paper or other objects.
15. Do not use heater if any part has been ex-
posed to or under water. Immediately call
a qualied service technician to inspect
the room heater and to replace any part
of the control system and any gas control
which has been under water.
16. Do not operate heater if any log is broken.
Do not operate heater if a log is chipped
(dime-sized or larger).
17. Turn heater off and let cool before servic-
ing. Only a qualied service person should
service and repair heater.
18. Operating heater above elevations of
4,500 feet could cause pilot outage.
19. Provide adequate clearances around air
openings.
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120890-01D4
PRODUCT
IDENTIFICATION
Ignitor
Control Knob
Figure 1 - Yellow Flame Vent-Free Gas Log
Heater
Log Set
LOCAL CODES
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/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
National Fire Protection Association, Inc.
Note: Where listed vented decorative logs
are required, thermostat models are not
permitted.
State of Massachusetts: The installation must be made by a licensed plumber
or gas fitter in the Commonwealth of
Massachusetts.
Sellers of unvented propane or natural
gas-red supplemental room heaters shall
provide to each purchaser a copy of 527
CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for
bedroom and bathroom installation in the
Commonwealth of Massachusetts.
1430 Broadway
New York, NY 10018
Batterymarch Park
Quincy, MA 02269
UNPACKING
CAUTION: Do not remove the
data plates from the grate assembly. The data plates contain
important warranty and safety
information.
1. Remove logs and heater base assembly
from carton.
Note: Do not pick up heater base assem-
bly by burners. This could damage heater.
Always handle base assembly by grate.
2. Remove all protective packaging applied
to logs and heater for shipment.
3. Check heater for any shipping damage. If
heater is damaged call DESA Heating, LLC
at 1-866-672-6040 for replacement parts
before returning to dealer.
PRODUCT FEATURES
OpERATION
This heater is clean burning. It requires no
outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by
realistic, dancing yellow ames. This heater
is designed for vent-free operation with ue
dampe r clo sed. It has b een tested and
approved to ANSI Z21.11.2 standard for
unvented heaters. State and local codes
in some areas prohibit the use of vent-free
heaters.
SAFETY pILOT
This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The
ODS/pilot is a required feature for vent-free
room heaters. The ODS/pilot shuts off the
heater if there is not enough fresh air.
pIEzO IGNITION SYSTEM
This heater has a piezo ignitor. This system requires no matches, batteries or other sources
to light heater.
120890-01D5
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AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a room or space
unless the required volume of
indoor combustion air is provided
by the method described in the
National Fuel Gas Code, ANSI
Z223.1/NFPA 54, the International
Fuel Gas Code, or applicable
local codes. Read the following
instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Today’s homes are built more energy efcient
than ever. New materials, increased insulation
and new construction methods help reduce
heat loss in homes. Home owners weather
strip and caulk around windows and doors
to keep the cold air out and the warm air in.
During heating months, home owners want
their homes as airtight as possible.
While it is good to make your home energy
efcient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning appliances need fresh air for proper combustion
and ventilation.
Exhaust fans, replaces, clothes dryers and
fuel burning appliances draw air from the house
to operate. You must provide adequate fresh
air for these appliances. This will insure proper
venting of vented fuel-burning appliances.
pROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code. ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 6 through 8 will help
you classify your space and provide adequate
ventilation.
Unusually Tight Construction
The air that leaks around doors and windows
may provide enough fresh air for combustion
and ventilation. However, in buildings of un-
usually tight construction, you must provide
additional fresh air.
Unusually tight construction is dened as
construction where:
a. walls and ceilings exposed to the out-
side atmosphere have a continuous
water vapor retarder with a rating of
one perm (6x10
less with openings gasketed or sealed
and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to
areas such as joints around window
and door frames, between sole plates
and oors, between wall-ceiling joints,
between wall panels, at penetrations
for plumbing, electrical and gas lines
and at other openings.
If your home meets all of the three criteria
above, you must provide additional fresh air.
See Ventilation Air From Outdoors, page 8.
If your home does not meet all of the three
criteria above, proceed to Determining
Fresh-Air Flow For Heater Location.
Conned Space and Unconned Space
The National Fuel Gas Code ANSI Z223.1/
NFPA 54 denes a conned 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 ag-
gregate input rating of all appliances installed
in that space and an unconned 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 which the appliances
are installed*, through openings not furnished
with doors, are considered a part of the unconned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
-11
kg per pa-sec-m2) or
DETERMINING FRESH-AIR FLOW
FOR FIREpLACE LOCATION
Determining if You Have a Conned or
Unconned Space
Use this work sheet to determine if you have
a conned or unconned space.
Space: Includes the room in which you will
install replace plus any adjoining rooms with
doorless passageways or ventilation grills
between the rooms.
www.desatech.com
120890-01D6
Or
Remove
Door into
Adjoining
Room,
Option
3
Ve ntilation Grills
Into Adjoining Room,
Option 2
Ve ntilation
Grills Into
Adjoining
Room,
Option 1
12"
12"
AIR FOR COMBUSTION
AND VENTILATION
Continued
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) = 2,560 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. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
________ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 2,560 cu. ft. (volume of space) x
20 = 51,200 (maximum Btu/Hr the space can
support)
3. Add the Btu/Hr of all fuel burning appliances
in the space.
Vent-free replace __________ Btu/HrGas water heater* __________ Btu/Hr
Gas furnace __________ Btu/Hr
Vented gas heater __________ Btu/Hr
Gas replace logs __________ Btu/Hr
Other gas appliances* + __________ Btu/Hr
Total = __________ Btu/Hr
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
Gas water heater __________ Btu/HrVent-free replace + __________ Btu/Hr
Total = __________ Btu/Hr
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 (ma ximum the
space can support)
71,500 Btu/Hr (actual amount of
Btu/Hr used)
The space in the example is a conned space
because the actual Btu/Hr used is more than the
maximum Btu/Hr the space can support. You
must provide additional fresh air. Your options
are as follows:
40,000
31,500
71,500
A. Rework worksheet, adding the space of an
adjoining room. If the extra space provides an
unconned space, remove door to adjoining
room or add ventilation grills between rooms.
See Ventilation Air From Inside Building.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors, page 8.
C. Install a lower Btu/Hr replace, if lower Btu/Hr
size makes room unconned.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is
an unconned space. You will need no additional
fresh air ventilation.
WARNING: If the area in which
the heater may be operated does
not meet the required volume for
indoor combustion air, combustion and ventilation air shall be
provided by one of the methods
described in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54,
the International Fuel Gas Code,
or applicable local codes.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoining unconned space, you must provide
two permanent openings: one within 12" of the
ceiling and one within 12" of the oor on the
wall connecting the two spaces (see options 1
and 2, Figure 2). You can also remove door into
adjoining room (see option 3, Figure 2). Follow the National Fuel Gas Code ANSI Z223.1/
NFPA 54 Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
Figure 2 - Ventilation Air from Inside Building
120890-01D7
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Outlet
Air
V e ntilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air
V e ntilated
Crawl Space
T o
Crawl
Space
T o Attic
AIR FOR COMBUSTION
AND VENTILATION
Continued
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two permanent openings: one within 12" of the ceiling
and one within 12" of the oor. Connect these
items directly to the outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation for required size
of ventilation grills or ducts.
IMPORTANT: Do not provide openings for
inlet or outlet air into attic if attic has a thermo-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
Figure 3 - Ventilation Air from Outdoors
INSTALLATION
NOTICE: This heater is intended
for use as supplemental heat.
Use this heater along with your
primary heating system. Do not
install this heater as your primary heat source. If you have a
central heating system, you may
run system’s circulating blower
while using heater. This will help
circulate the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
vice person must install heater.
Follow all local codes.
WARNING: A qualied ser-
www.desatech.com
NOTICE: State or local codes may
only allow operation of this appliance in a vented conguration.
Check your state or local codes.
WARNING: Before installing
in a solid fuel burning replace,
the chimney ue and rebox
must be cleaned of soot, creosote, ashes and loose paint by
a qualified chimney cleaner.
Creosote will ignite if highly
heated. A dirty chimney ue may
create and distribute soot within
the house. Inspect chimney ue
and rebox for damage. If damaged, repair ue before operating heater.
WARNING: Seal any fresh
air vents or ash clean-out doors
located on oor or wall of replace. If not, drafting may cause
pilot outage or sooting. Use a
heat-resistant sealant. Do not
seal chimney ue damper.
WARNING: Never install the
heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing or other ammable
objects are less than 36" from
front or 42" from top of heater.
For side clearances see Figure
4, page 9
• in high trafc areas
• in windy or drafty areas
120890-01D8
INSTALLATION
Continued
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, but
not limited to, tobacco smoke,
aromatic candles, cleaning uids, oil or kerosene lamps, etc.) in
the air exist, may discolor walls
or cause odors.
IMPORTANT: Vent-free heaters add moisture
to the air. Although this is benecial, installing
heater in rooms without enough ventilation
air may cause mildew to form from too much
moisture. See Air for Combustion and Ventilation, page 6.
CHECK GAS TYpE
Use only the correct gas type (natural or propane/LP) for your unit. If your gas supply is not
correct, do not install heater. Call dealer where
you bought heater for proper type heater.
WARNING: This appliance is
equipped for either natural gas
or propane/LP gas but not both.
Gas type is indicated on the rating plate. Field conversion is not
permitted.
LOG SIzING REQUIREMENTS
Minimum Firebox Size
HeightFront
Depth
17"14"28"21"
*Measured at 14" Depth
Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127-listed manufactured replace or certied vent-free rebox.
MINIMUM CLEARANCES FOR SIDE
COMBUSTIBLE MATERIAL, SIDE WALL
AND CEILING
A. Clearances from the side of the replace
cabinet to any combustible material and
wall should follow diagram in Figure 4.
Example: The face of a mantel, bookshelf,
etc. is made of combustible material and
protrudes 3 1/2" from the wall. This com-
bustible material must be 4" from the side
of the replace cabinet (see Figure 4).
Note: When installing your gas logs into
a manufactured rebox, follow rebox
manufacturer’s instructions for minimum
clearances to combustible materials.
B. Clearances from the top of the replace
opening to the ceiling should not be less
than 42".
Example
Rear Width Width*
INSTALLATION AND CLEARANCES
(Vent-Free Operation Only)
WARNING: Maintain the
*
minimum clearances. If you
can, provide greater clearances
from oor, ceiling and adjoining
wall.
MINIMUM FIREpLACE CLEARANCE
TO COMBUSTIBLE MATERIALS
Side Wall 16", Ceiling 42", Front 36"
120890-01D9
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*Minimum 16" from Side Wall
Figure 4 - Minimum Clearance for
Combustible to Wall
Minimum
Noncombustible
Material
Minimum
Noncombustible
Material Height
Distances to
Underside of
Mantel
To p of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
12"
(A)
18" 20" 22" 24"
All
minimum
distances
are in
inches
2
1
/2"
6"
8"
10"
INSTALLATION
Heat Resistant
Material
(A)
Continued
MINIMUM NONCOMBUSTIBLE
MATERIAL CLEARANCES
If Not Using Mantel
Note: If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the information below.
You must have noncombustible material(s)
above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.)
must be at least 1/2" thick. With sheet metal,
you must have noncombustible material behind it. Noncombustible material must extend
at least 8" up (for all models). If noncombustible material is less than 12", you must install
the replace hood accessory. See Figure 5 for
minimum clearances.
Noncombustible
Material
Distance (A)
12" or moreNoncombustible material
Between 8" Install replace hood and
Less than 8"Noncombustible mate-
Requirements for Safe
Installation
okay.
12" accessory (GA6050,
GA6052 or GA6053 see
Accessories, page 27).
rial must be extended to
at least 8". See Between
8" and 12", above. If you
cannot extend material,
you must operate heater
with ue damper open.
If Using Mantel
You must have noncombustible material(s)
above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.) must
be at least 1/2" thick. With sheet metal, you
must have noncombustible material behind it.
Noncombustible material must extend at least
8" up. If noncombustible material is less than
12", you must install the replace hood acces-
sory. Even if noncombustible material is more
than 12", you may need the hood accessory to
deect heat away from your mantel shelf. See
Figures 5 and 6 and Figure 7 on page 11 for
minimum clearances.
MANTEL CLEARANCES
In addition to meeting noncombustible mate-
rial clearances, you must also meet required
clearances between replace opening and
mantel shelf. If you do not meet the clearances
listed below, you will need a hood.
Determining Minimum Mantel Clearance
If you meet minimum clearance between
mantel shelf and top of replace opening, a
hood is not required (see Figure 6).
Figure 5 - Heat Resistant Material (Slate,
www.desatech.com
Marble, Tile, etc.) Above Fireplace
Figure 6 - Minimum Mantel Clearances
Without Using Hood
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
clearances required. Follow minimum clearances shown in Figure 7, page 11, when
using a hood.
120890-01D10
INSTALLATION
Minimum
Noncombustible
Material
8"
Min.
12" 15" 18" 20"
2½"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052 or
GA6053)
To p of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
14"
Min.
Combustible
Material
Noncombustible Material
Hearth
5"
Min.
Combustible
Material
Continued
NOTICE: Surface temperatures
of adjacent walls and mantels become hot during operation. Walls
and mantels above the rebox
may become hot to the touch.
If installed properly, these temperatures meet the requirement
of the national product standard.
Follow all minimum clearances
shown in this manual.
NOTICE: If your installation does
not meet the minimum clearances shown, you must do one
of the following:
• raise the mantel to an accept-
able height
• remove the mantel
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
INSTALLING HEATER BASE
ASSEMBLY
CAUTION: Do not remove the
data plates attached to the heater
base assembly. The data plates
contain important warranty and
safety information.
WARNING: You must secure
this heater to replace oor. If
not, heater will move when you
adjust controls. Moving heater
Figure 7 - Minimum Mantel Clearances
When Using Hood
FLOOR CLEARANCES
A. If installing appliance on the oor level,
you must maintain the minimum distance
of 14" to combustibles (see Figure 8).
B. If combustible materials are less than 14"
to the replace, you must install appliance
at least 5" above the combustible ooring
(see Figure 9).
may cause a gas leak.
WARNING: If installing in a
sunken replace, special care
is needed. You must raise the
replace oor to allow access to
heater control panel. This will insure adequate air ow and guard
against sooting and controls being damaged. Raise replace oor
with noncombustible material.
120890-01D11
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Make sure material is secure.
INSTALLATION
Continued
CAUTION: Do not pick up
heater base assembly by the
burner. This could damage
heater. Only handle base assembly by grates.
IMPORTANT: Make sure heater burners are
level. If heater is not level, heater will not work
properly. Avoid damage to thermostat bulb.
Avoid nicks or sharp bends in thermostat
bulb wire. Keep thermostat bulb in mounting
bracket until ready to mount base to oor. See
Optional Positioning Of Thermostat Sensing
Bulb, page 24.
Installation Items Needed
• hardware package (provided with heater)
• approved exible gas hose (not provided)
(if allowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" drill bit
• athead screwdriver
1. Apply pipe joint sealant lightly to male
threads of tting to be threaded into gas
regulator. Connect approved exible gas
hose to gas regulator of heater (see Figure 10).
IMPORTANT: Hold gas regulator with
wrench when connecting flexible gas
hose.
2. Lo cate masonry screws in hardware
package.
3. Position heater base assembly in re-
place.
4. Place logs in their proper position on heater
base (see Installing Logs, page 15).
5. Center heater base and logs front-to-front
and side-to-side in replace.
Fitting
Flexible Gas Hose
(if allowed by local codes)
Figure 10 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Heater Gas
Regulator
6. Carefully remove logs without moving
heater base.
7. Mark screw locations through holes in
mounting brackets (see Figure 11). If
installing in a brick-bottom replace, mark
screw locations in mortar joint of bricks.
8. Remove heater base from replace.
9. Drill holes at marked locations using 3/16"
drill bit.
10. Attach base assembly to replace oor
using two masonry screws (in hardware
package) (see Figure 11).
Masonry
Screw
Mounting
Bracket
Figure 11 - Attaching Base Assembly to
Fireplace Floor
CONNECTING TO GAS SUppLY
WARNING: This appliance
requires a 1/2" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualied service person must connect heater
to gas supply. Follow all local
codes.
CAUTION: Never connect
propane/LP heater directly to the
propane/LP supply. Propane/LP
heaters require an external regulator (not supplied). Install the
external regulator between the
heater and propane/LP supply.
www.desatech.com
120890-01D12
INSTALLATION
Continued
WARNING: For natural gas
units, never connect heater to
private (non-utility) gas wells.
This gas is commonly known
as wellhead gas.
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certied equipment shutoff
valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase
the optional CSA design-certied equipment
shutoff valve from your dealer.
For propane/LP gas, installer must supply
an external regulator. External regulator will
reduce incoming gas pressure. You must
reduce incoming gas pressure to between
11" and 14" of water. If you do not reduce
incoming gas pressure, heater regulator damage could occur. Install external regulator with
vent pointing down as shown in Figure 12.
Pointing vent down protects it from freezing
rain or sleet.
CAUTION: Use only new,
black iron or steel pipe. Internally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of
1/2" diameter or greater to allow
proper gas volume to heater. If
pipe is too small, undue loss of
volume will occur.
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).
IMPORTANT: Install equipment shutoff valve
in an accessible location. Main gas valve is for
turning on or shutting off gas to appliance.
Check your building codes for any special
requirements for locating equipment shutoff
valve to replaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could
result in clogged heater valves.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Propane/LP
Supply Tank
External
Regulator
Vent
Pointing
Down
Figure 12 - External Regulator With Vent
Natural
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
Propane/LP
From External
Regulator
(11" W.C.**
to 14" W.C.
Pressure
* Purchase optional CSA design-certied
equipment shutoff valve from your dealer.
** Min. inlet pressure for purpose of input
adjustment.
Pointing Down
CSA Design-Certied
Equipment Shutoff Valve
With 1/8" NPT Tap*
Gas
Regulator
3" Min.
Tee Cap Pipe
Joint Nipple
Sediment Trap
Figure 13 - Gas Connection
Approved
Flexible
Gas Hose (if
allowed by
local codes)
120890-01D13
www.desatech.com
INSTALLATION
Continued
We recommend that you install sediment trap
in supply line as shown in Figure 13, page
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 moisture and
contaminants. This keeps them from going
into heater controls. If sediment trap is not
installed or is installed wrong, heater may
not run properly.
CAUTION: Avoid damage to
regulator. Hold gas regulator
with wrench when connecting it
to gas piping and/or ttings.
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections , internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an
open ame to check for a leak.
Apply a commercial leak detection solution to all joints.
Bubbles forming show a leak.
Correct all leaks at once.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
3. Pressurize supply piping system by either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas or using compressed air.
4. Check all joints of gas supply piping system. Apply a commercial leak detection
solution to all joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected
ttings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see
Figure 14).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas or using compressed air.
3. Check all joints from gas meter (natural
gas) or propane/LP supply to equipment
shutoff valve (see Figure 15 or Figure 16,
page 15). Apply a commercial leak detection solution to all joints. Bubbles forming
show a leak.
4. Correct all leaks at once.
Equipment
Shutoff Valve
Open
CAUTION: For propane/LP
units, make sure external regulator has been installed between
propane/LP supply and heater.
See guidelines under Connect-ing to Gas Supply, page 12.
pRESSURE TESTING GAS SUppLY
pIpING SYSTEM
Test pressures In Excess Of 1/2 pSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
main gas valve (control valve) and equipment shutoff valve from gas supply piping.
Pressures in excess of 1/2 psig will damage heater regulator.
www.desatech.com
Closed
Figure 14 - Equipment Shutoff Valve
Propane/LP
Supply Tank
Figure 15 - Checking Gas Joints
Equipment Shutoff Valve
Control Valve
Location
(Propane/LP Gas Only)
120890-01D14
INSTALLATION
Continued
Equipment Shutoff Valve
Gas
Meter
Control Valve Location
Figure 16 - Checking Gas Joints
(Natural Gas Only)
Pressure Testing Heater Gas
Connections
1. Open equipment shutoff valve (see Figure
14, page 14).
2. Open main gas valve located on or near
gas meter for natural gas or open propane/LP supply tank valve.
3. Make sure control knob of heater is in the
OFF position.
4. Check all joints from gas meter (natural
gas) or propane/LP supply to equipment
shutoff valve (see Figure 15, page 14
or Figure 16). Apply a commercial leak
detection solution to all joints. Bubbles
forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operation, page 16.
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 17.
INSTALLING LOGS
CAUTION: After installa-
tion and periodically thereafter,
check to ensure that no ame
comes in contact with any log.
With the heater set to High, check
to see if ames contact any log. If
so, reposition logs according to
the log installation instructions
in this manual. Flames contacting logs will create soot.
It is very important to install these logs exactly
as instructed. Do not modify logs. Only use
logs supplied with heater.
1. Place main log assembly (#1) onto base.
Cutout on front right will t over burner
(see Figure 17). Make sure back of log
assembly is resting on back tabs of base.
There are 2 small notches on log that t
onto front tabs.
2. Place front log onto grate. Log is notched
to sit over grate (see Figure 18, page
16). Position holes on bottom of log over
shoulder screws on base.
3. Place crossover log onto pins on main log
and front log (see Figure 19, page 16).
Note: Nontextured end of crossover log
faces back of rebox and will not be seen
from front of log set.
4. Add lava rock around base of heater if
desired. Do not place any lava rock on
logs or burner.
Notch
for Front
Tab
Main Log Assembly
Cutout Fits
Over Burner
WARNING: Failure to position the parts in accordance
with these diagrams or failure
to use only parts specically
Shoulder
Screw
approved with this heater may
result in property damage or
personal injury.
Front Tab
Notch for
Front Tab
Figure 17 - Installing Main Log (#1)
120890-01D15
www.desatech.com
Front Tab
Sits on
Back Tab
Back Tab
Burner
INSTALLATION
Continued
Front Log
Grate
Figure 18 - Installing Front Log (#2)
Nontextured
End
Pin
Crossover
Log
Figure 19 - Installing Crossover Log (#3)
OPERATION
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a re or explosion may result
causing property damage, personal injury or loss of life.
A. This appliance has a pilot which must
be ligh ted by hand. W hen lightin g
the pilot, follow these instructions
exactly.
B. BEFORE LIGHTING smell all around
the appliance area for gas. Be sure to
smell next to the oor because some
gas is heavier than air and will settle
on the oor.
WHAT TO DO IF YOU SMELL GAS
• 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 supplier,
call the re department.
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 qualied service technician or gas supplier.
Force or attempted repair may result in
a re or explosion.
D. Do not use this appliance if any part
has been under water. Immediately call
a qualied service technician to inspect
the appliance and to replace any part of
the control system and any gas control
which has been under water.
LIGHTING
INSTRUCTIONS
WARNING
• If replace has glass doors,
never operate this heater with
glass doors closed. If you op-
erate heater with doors closed,
heat buildup inside replace
will cause glass to burst. Make
sure there are no obstructions
across openings of replace.
• You must operate this heater
with a replace screen in place.
Make sure replace screen is
closed before running heater.
NOTICE: During initial operation of
new heater, burning logs will give
off a paper-burning smell. Orange
ame will also be present. Open
damper or window to vent smell.
This will only last a few hours.
Note: Home owners generally prefer to operate their heater with chimney damper closed.
This will put all of the heat into room. However,
there may be times you will desire full ames
of HI heat setting but will nd heat output
excessive. You can open chimney damper
(if you have one) fully or partially to release
some heat.
www.desatech.com
120890-01D16
OPERATION
LO
HI
OFF
Pilot
Continued
8. Turn control knob counterclockwise
to desired heating level. The burners
should light. Set control knob to any heat
level between HI and LO.
WARNING: Damper handle
will be hot if heater has been
running.
1. STOP! Read safety information, page 16.
2. Make sure equipment shutoff valve is fully
open.
3. Turn control knob clockwise to OFF
position.
9. To leave pilot lit and shut off burners
only, turn control knob clockwise
to PILOT position.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
Thermocouple
Ignitor Electrode
4. Wait ve (5) minutes to clear out any gas.
Then smell for gas, including near oor. If
you smell gas, STOP! Follow “B” in safety
Pilot Burner
information, page 16. If you don’t smell
gas, go to next step.
5. Turn control knob counterclockwise
to PILOT position. Press in control knob
for ve (5) seconds (see Figure 20).
Note: You may be running this heater
for the rst time after hooking up to gas
supply. If so, control knob may need to be
pressed in for 30 seconds or more. This
will allow air to bleed from gas system.
• If control knob does not pop out when
released, contact a qualified service
person or gas supplier for repairs.
6. With control knob pressed in, press and
release ignitor button. This will light pilot.
Pilot is attached to front burner. If needed,
keep pressing ignitor button until pilot
lights.
Note: If pilot does not stay lit, contact a
qualied service person or gas supplier
for repairs. Until repairs are made, light
pilot with match. To light pilot with match,
see Manual Lighting Procedure.
7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds,
release control knob.
Note: If pilo t goes out, repe at step s
3 through 7. This heater has a safety
interlock system. Wait one (1) minute
for system to reset before lighting pilot
again.
1. Turn control knob clockwise to OFF
position.
2. Close equipment shutoff valve (see Figure
14, page 14).
Thermostat control knob can be set to any
comfort level between HI and LO. Thermostat will gradually modulate heat output and
ame height from higher to lower settings or
pilot, in order to maintain comfort level you
select. The ideal comfort setting will vary
by household depending upon amount of
space to be heated, output of central heating
system, etc.
Note: Selecting HI setting with control knob
will cause burner to remain fully on, without
modulating down in most cases.
Figure 21 - Pilot
TO TURN OFF GAS
TO AppLIANCE
THERMOSTAT CONTROL
OpERATION
MANUAL LIGHTING
pROCEDURE
1. Follow steps 1 through 5 under Lighting
Instructions, column 1.
2. Depress control knob and light pilot with
match.
3. Keep control knob pressed in for 30 sec-
Ignitor Button
Control Knob
Figure 20 - Control Knob and Ignitor
Button Location
120890-01D17
www.desatech.com
onds after lighting pilot. After 30 seconds,
release control knob. Now follow step 8
under Lighting Instructions, column 1.
INSPECTING BURNERS
Check pilot ame pattern and burner ame
patterns often.
pILOT FLAME pATTERN
Figure 22 shows a correct pilot ame pattern.
Figure 23 shows an incorrect pilot ame pattern. Incorrect pilot ame is not touching thermocouple. This will cause the thermocouple
to cool. When thermocouple cools, heater
will shut down.
If pilot ame pattern is incorrect, as shown
in Figure 23
• turn heater off (see To Turn Off Gas to Appliance, page 17
• see Troubleshooting, page 20
Note: Pilot ame on natural gas units will have
a slight curve, but ame should be blue and
have no yellow or orange color.
Pilot Burner
Thermocouple
Figure 22 - Correct Pilot Flame Pattern
Thermocouple
Pilot Burner
Figure 23 - Incorrect Pilot Flame Pattern
BURNER pRIMARY AIR HOLES
Air is drawn into burner through holes in tting at entrance to burner. These holes may
become blocked with dust or lint. Periodically
inspect these holes for any blockage and
clean as necessary. Blocked air holes will
create soot.
MAIN BURNER
Periodically inspect all burner ame holes
with heater running. All slotted burner ame
holes should be open with yellow ame present. All round burner ame holes should be
open with a small blue ame present. Some
burner ame holes may become blocked by
debris or rust, with no ame present. If so,
turn off heater and let cool. Remove blockage,
blocked burner ame holes will create soot.
CLEANING AND MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner and circulating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a
qualied service person. Heater
may need more frequent cleaning due to excessive lint from
carpeting, bedding material, pet
hair, etc.
www.desatech.com
WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clean may result in
sooting and property damage.
ODS/pILOT AND BURNER
Use a vacuum cleaner or small, soft bristled
brush to clean.
BURNER INjECTOR HOLDER AND
pILOT AIR INLET HOLE
The primary air inlet holes allow the proper
amount of air to mix with the gas. This provides a clean burning ame. Keep these holes
clear of dust, dirt and lint. Clean these air inlet
holes prior to each heating season. Blocked
air holes will create soot. We recommend that
you clean the unit every three months during
operation and have heater inspected yearly
by a qualied service person.
120890-01D18
CLEANING AND MAINTENANCE
Continued
We also recommend that you keep burner
tube and pilot assembly clean and free of
dust and dirt. To clean these parts we recommend using compressed air no greater than
30 PSI. Your local computer store, hardware
store or home center may carry compressed
air in a can. If using compressed air in a can,
please follow directions on can. If you don’t
follow directions on can, you could damage
pilot assembly.
1. Shut off unit, including pilot. Allow unit to
cool for at least thirty minutes.
2. Inspect burner, pilot and primary air inlet
holes on injector holder for dust and dirt
(see Figure 24).
3. Blow air through ports/slots and holes in
burner.
4. Check injector holder located at end of
burner tube again. Remove any large
particles of dust, dirt, lint or pet hair with
a soft cloth or vacuum cleaner nozzle.
5. Blow air into primary air holes on injector
holder.
6. In case any large clumps of dust have now
been pushed into burner, repeat steps 3
and 4.
Clean pilot assembly also. A yellow tip on pilot
ame indicates dust and dirt in pilot assembly.
There is a small pilot air inlet hole about 2"
from where pilot ame comes out of pilot assembly (see Figure 25). With unit off, lightly
blow air through air inlet hole. You may blow
through a drinking straw if compressed air is
not available.
Injector Holder (May Be Brass or
Aluminum Depending on Model)
Pilot
Assembly
Pilot Air
Inlet Hole
Figure 25 - Pilot Inlet Air Hole
LOGS
• If you remove logs for cleaning, refer to
Installing Logs, page 15, to properly replace
logs.
• Replace log(s) if broken or chipped (dimesized or larger).
BURNER pRIMARY AIR HOLES
Air is drawn into burner through the 8 holes
in brass tting at entrance to burner. These
holes may become blocked with dust or lint.
Periodically inspect these holes for any blockage and clean as necessary. Blocked air holes
will create soot.
MAIN BURNER
Periodically inspect all burner ame holes
with heater running. All slotted burner ame
holes should be open yellow ame present.
All round burner ame holes should be open
with a small blue ame present. Some burner
ame holes may become blocked by debris
or rust, with no ame present. If so, turn
off heater and let cool. Remove blockage,
blocked burner ame holes will create soot.
Burner Tube
Primary Air Inlet Holes
(Shape of Holes May
Vary by Model)
Figure 24 - Injector Holder On Outlet
120890-01D19
Burner Tube
www.desatech.com
TROUBLESHOOTING
WARNING: Turn off and unplug heater and let cool before servicing.
Only a qualied service person should service and repair heater.
CAUTION: Never use a wire, needle or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
OBSERVED pROBLEM
When ignitor button is pressed,
there is no spark at ODS/
pilot
pOSSIBLE CAUSE
1. Ignitor electrode not connected to ignitor cable
2. Ignitor cable pinched or
wet
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ignitor electrode broken
7. Ignitor electrode positioned
wrong
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched
by a ny meta l or tubing.
Keep ignitor cable dry
3. Tighten nut holding piezo
ignitor to base panel of log
set. Nut is located behind
base panel
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace pilot assembly
7. Replace pilot assembly
When ignitor button is pressed,
there is spark at ODS/pilot but
no ignition
1. Gas supply turned off or
equipmen t shutoff valve
closed
2. Control knob not in PILOT
position
3. Control knob not pressed in
while in PILOT position
4. Air in gas lines when in-
stalled
5. Depleted gas supply (propane/LP only)
6. ODS/pilot is clogged
7. Gas regulator setting is not
correct
www.desatech.com
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while
in PILOT position
4. Co nti nue hol din g d own
control knob. Repeat igniting oper ation until air is
removed
5. Contact local propane/LP
gas company
6. Clean ODS/pilot (see Clean-ing and Maintenance, page
18) or replace ODS/pilot
assembly
7. Replace gas regulator
120890-01D20
OBSERVED pROBLEM
ODS/pilot lights but flame
goes out when control knob
is released
TROUBLESHOOTING
Continued
pOSSIBLE CAUSE
1. Con t r ol k n ob no t ful l y
pressed in
2. Control knob not pressed in
long enough
3. Safety interlock system has
been triggered
4. Equipment shutoff valve not
fully open
5. Pilot flame not touching
thermocouple, which allows thermocouple to cool,
causing pilot ame to go
out. This problem could be
caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
6. Thermocouple connection
loose at control valve
7. Thermocouple damaged
8. Control valve damaged
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds
3. Wait one minute for safety
interlock system to reset.
Repeat ignition operation
4. Fully open equipment shutoff valve
5. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 18) or replace ODS/
pilot assembly
6. Hand tighten until snug,
then tighten 1/4 turn more
7. Replace pilot assembly
8. Replace control valve
Burner does light after ODS/
pilot is lit
Delayed ignition of burner
Burner backring during combustion
120890-01D21
1. Burner orice clogged
2. Inlet gas pressure is too
low
1. Manifold pressure is too
low
2. Burner orice clogged
1. Burner orice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
www.desatech.com
1. Clean burner (see Cleaning
and Maintenance, page 18)
or replace burner orice
2. Contact loca l natural or
propane/LP gas company
1. Contact loca l natural or
propane/LP gas company
2. Clean burner (see Cleaning
and Maintenance, page 18)
or replace burner orice
1. Clean burner (see Cleaning
and Maintenance, page 18)
or replace burner orice
2. Replace damaged burner
3. Replace gas regulator
OBSERVED pROBLEM
Slight smoke or odor during
initial operation
TROUBLESHOOTING
Continued
pOSSIBLE CAUSE
1. Not enough air
2. Gas regulator defective
3. Residues from manufacturing processes and logs
curing
REMEDY
1. Check burner for dirt and
de b ris . If fo u nd, cl e an
burner (see Cleaning and
Maintenance, page 18)
2. Replace gas regulator
3. Problem will stop after a few
hours of operation
Moisture/condensation no-
ticed on windows
Heater produces a whistling
noise when burner is lit
White powder residue forming
within burner box or on adjacent walls or furniture
Heater produces a clicking/
ticking noise just after burner
is lit or shut off
1. Not enough combustion/
ventilation air
1. Turning control knob to HI
positio n whe n burner is
cold
2. Air in gas line
3. Air passageways on heater
blocked
4. Dirty or partially clogged
burner orice
1. When heated, vapors from
furniture polish, wax, carpet
cleaners, etc. may turn into
a white powder residue
1. Met al exp a ndi ng whi l e
heating or contracting while
cooling
1. Refer to Air for Combustion and Ventilation requirements (page 6)
1. Turn control knob to LO
position and let warm up
for a minute
2. Operate burner until air is
removed from line. Have
gas line checked by local
natural or propane/LP gas
company
3. Observe minimum installat i on clea r anc e s (s ee
page 9)
4. Clean burner (see Cleaning
and Maintenance, page 18)
or replace burner orice
1. Turn heater off when using furniture polish, wax,
carpet cleaners or similar
products
1. This is normal with most
heaters. If noise is excessive, contact qualied service person
www.desatech.com
120890-01D22
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.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
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
Heater produces unwanted
odors
Heater shuts off in use (ODS
operates)
Gas odor even when control
knob is in OFF position
Gas odor during combustion
pOSSIBLE CAUSE
1. Heater burning vapors from
paint , hair spra y, glue s,
cleaners, chemicals, new
carpet, etc. (See IMPOR-
TANT statement above)
2. Low fuel supply (propane/
LP only)
3. Gas leak. See Warning
statement above
1. No t eno ug h fresh air i s
available
2. Low line pressure
3. O D S / p i l o t i s p a rtially
clogged
1. Gas leak. See Warning
statement above
2. Control valve defective
1. Forei gn matter b etween
control valve and burner
2. Gas leak. See Warning
statement above
REMEDY
1. Open window and ventilate room. Stop using odor
ca usi ng prod ucts wh ile
heater is running
2. Rell supply tank (propane/
LP only)
3. Locate and correct all leaks
(see Checking Gas Con-
nections, page 14)
1. Open window and/or door
for ventilation
2. Contact loca l natural or
propane/LP gas company
3. C lean O D S / pilot ( s e e
Cleaning and Maintenance,
page 18)
1. Locate and correct all leaks
(see Checking Gas Con-nections, page 14)
2. Replace control valve
1. Take apart gas tubing and
remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Con-nections, page 14)
Log set cycles to pilot, but room
temperature drops to a lower
than ideal level before log set
comes back on
120890-01D23
1. Thermostat sensing bulb
needs to be repositioned
www.desatech.com
1. Repo s i t ion th e r m ostat
sensing bulb (see Optional
Positioning of Thermostat
Sensing Bulb, page 24
OPTIONAL POSITIONING OF THERMOSTAT
SENSING BULB
FOR MASONRY AND FACTORYBUILT METAL FIREpLACE
If your log set cycles to pilot, but room temperature drops to a lower than ideal comfort
level before log set comes back on, you may
want to reposition thermostat sensing bulb.
Thermostat sensing bulb is located near gas
valve assembly on mounting bracket. This
location allows the thermostat to keep room
temperature at an ideal comfort level for most
replace applications. For positioning thermostat sensing bulb elsewhere, an adhesive-
backed mounting clip is available.
Tools needed: 1/4" hex driver or socket
1. Remove logs. Locate gas valve assembly and thermostat sensing bulb (see
Figure 26).
2. With 1/4" hex driver or socket, loosen thermostat screw. Carefully slide thermostat
sensing bulb out of retaining clamp (see
Figure 28).
Note: Do not remove the screw. Make
sure you tighten screw after removing
thermostat sensing bulb.
IMPORTANT: Do not force or bend ther-
mostat sensing bulb or capillary.
3. Thermostat sensing bulb may be located
in lower right front side of replace. Determine location of sensing bulb, but do
not mount sensing bulb until step 4. If you
have a masonry replace, see Figure 29
for location. If you have a factory-built
metal replace, see Figure 30 for location.
If your replace has glass doors, position
sensing bulb directly behind door gap on
right bottom side (see Figure 31).
Figure 27 - Adhesive-backed Mounting Clip
Thermostat
Screw
Capillary
Figure 28 - Removing Thermostat
Sensing Bulb
Thermostat
Sensing Bulb
Adhesive-backed
Mounting Clip
Figure 29 - Locating Thermostat Sensing
Bulb on Masonry Fireplace
Thermostat
Sensing Bulb
Thermostat
Sensing
Bulb
Retaining
Clamp
Gas Valve
Assembly
Thermostat
Sensing Bulb
Figure 26 - Location of Gas Valve
Assembly and Thermostat Sensing Bulb
www.desatech.com
Adhesive-backed
Mounting Clip
Figure 30 - Locating Thermostat Sensing
Bulb on Factory-built Metal Fireplace
120890-01D24
OPTIONAL POSITIONING OF THERMOSTAT
SENSING BULB
Continued
4. Mounting clip must be a minimum of 3"
from bottom of replace to prevent crimp-
ing of capillary. Once you have decided
on a location, clean area thoroughly.
Remove paper backing from adhesive on
back of mounting clip. Press clip into new
location so thermostat sensing bulb will
be positioned vertically with capillary at
bottom (see Figure 32). Slide thermostat
sensing bulb into clip.
IMPORTANT: Do not crimp capillary.
Thermostat
Sensing Bulb
Adhesivebacked
Mounting Clip
Glass Doors
Figure 31 - Installing Thermostat Sensing
Bulb behind Glass Doors
Thermostat
Sensing Bulb
Capillary
Figure 32 - Positioning Thermostat
Sensing Bulb in Vertical Position with
Capillary at Bottom
Adhesivebacked
Mounting Clip
Do Not Crimp
Capillary
SPECIFICATIONS
Model CLD3924PTC
• Rating (Variable): 20,000/39,000 Btu/Hr
• Type Gas: Propane/LP
• Ignition: Piezo
• Pressure Manifold: 8.0" W.C.
• Inlet Gas Pressure (in. of water):
Maximum 14" W.C., Minimum* 11" W.C.
• Shipping Weight: 27 lbs.
* For input adjustment
120890-01D25
www.desatech.com
Model CLD3924NTC
• Rating (Variable): 20,000/39,000 Btu/Hr
• Type Gas : Natural Gas
• Ignition: Piezo
• Pressure Manifold: 3.5" W.C.
• Inlet Gas Pressure (in. of water):
Maximum 10.5" W.C., Minimum* 5" W.C.
• Shipping Weight: 29 lbs.
* For input adjustment
TECHNICAL SERVICE
You may have further questions about installation, operation or troubleshooting. If so, contact DESA Heating, LLC at 1-866-672-6040.
When calling please have your model and
serial numbers of your heater ready.
You can also visit DESA Heating, LLC’s web
site at www.desatech.com.
REPLACEMENT PARTS
Note: Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
pARTS UNDER WARRANTY
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA Heating, LLC at 1-866-672-6040.
When calling DESA Heating, LLC, have
ready
• your name
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural
gas)
• purchase date
SERVICE HINTS
When Gas pressure Is Too Low
• pilot will not stay lit
• burners will have delayed ignition
• heater will not produce specied heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If
so, contact your local natural or propane/LP
gas supplier.
Usually, we will ask you to return the part to
the factory.
pARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA Heating, LLC at 1-866-672-6040 for
referral information.
When calling DESA Heating, LLC, have
ready
• model number of your heater
• the replacement part number
www.desatech.com
120890-01D26
ACCESSORIES
Purc ha se these accessories from you r
local dealer. If they can not supply these
accessories, either contact your nearest
Parts Central or call DESA Heating, LLC at
1-866-672-6040 for information. You can also
write to the address listed on the back page
of this manual.
DAMPER CLAMP - GA6080
For variably-controlled models. Perma-
nently opens chimney ue damper for vented
operation.
FIREpLACE HOOD
Black - GA6050
Brass - GA6052
Antique Brass - GA6053
For all models. Helps deect heat away from
mantel or wall above replace.
LAVA ROCK - GA6060
For all models. Order when additional rock
is desired.
PARTS CENTRAL
These Parts Centrals are privately owned businesses. They have agreed to support our
customer’s needs by providing original replacement parts and accessories.
Those Heater Guys
255 E. Stowell Street
Upland, CA 91786
909-928-3011
Tool & Equipment, Co.
5 Manila Ave
Hamden, CT 06514
1-800-397-7553
203-248-7553
Portable Heater Parts
342 N. County Rd. 400 East
Valparaiso, IN 46383
All States
219-462-7441
1-888-619-7060
sales@portableheaterparts.com
techservice@portableheaterparts.com
Standard Warranty: DESA Heating, LLC warrants this new product and any parts thereof to be free from
defects in material and workmanship for a period of one (1) year from the date of rst purchase from an
authorized dealer provided the product has been installed, maintained and operated in accordance with
DESA Heating, LLC’s warnings and instructions.
For products purchased for commercial, industrial or rental usage, this warranty is limited to 90 days from
the date of rst purchase.
Factory Reconditioned products
Limited Warranty: DESA Heating, LLC warrants factory reconditioned products and any parts thereof
to be free from defects in material and workmanship for 30 days from the date of rst purchase from an
authorized dealer provided the product has been installed, maintained and operated in accordance with
DESA Heating, LLC’s warnings and instructions.
Terms Common to All Warranties
The following terms apply to all of the above warranties:
Always specify model number and serial number when contacting the manufacturer. To make a claim under
this warranty the bill of sale or other proof of purchase must be presented.
This warranty is extended only to the original retail purchaser when purchased from an authorized dealer,
and only when installed by a qualied installer in accordance with all local codes and instructions furnished
with this product.
This warranty covers the cost of part(s) required to restore this product to proper operating condition and
an allowance for labor when provided by a DESA Heating, LLC Authorized Service Center or a provider
approved by DESA Heating, LLC. Warranty parts must be obtained through authorized dealers of this product and/or DESA Heating, LLC who will provide original factory replacement parts. Failure to use original
factory replacement parts voids this warranty.
Travel, handling, transportation, diagnostic, material, labor and incidental costs associated with warranty
repairs, unless expressly covered by this warranty, are not reimbursable under this warranty and are the
responsibility of the owner.
Excluded from this warranty are products or parts that fail or become damaged due to misuse, accidents,
improper installation, lack of proper maintenance, tampering, or alteration(s).
This is DESA Heating, LLC’s exclusive warranty, and to the full extent allowed by law; this express warranty
excludes any and all other warranties, express or implied, written or verbal and limits the duration of any
and all implied warranties, including warranties of merchantability and tness for a particular purpose to one
(1) year on new products and 30 days on factory reconditioned products from the date of rst purchase.
DESA Heating, LLC makes no other warranties regarding this product.
DESA Heating, LLC’s liability is limited to the purchase price of the product, and DESA Heating, LLC shall
not be liable for any other damages whatsoever under any circumstances including indirect, incidental, or
consequential damages.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of
incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specic legal rights, and you may also have other rights which vary from state to state.
For information about this warranty contact:
New products
) _____________________________
) __________________________
NOT A UPC
DESA Heating, LLC
2701 Industrial Drive
Bowling Green, KY 42101
www.desatech.com
1-866-672-6040
120890-01
Rev. D
09/08
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