Shown with optional cabinet mantel, hearth base, and trim accessories.
THERMOSTATICALLY-CONTROLLED MODELS
VSGF28NTE AND VSGF28PTE WITH SPLIT OAK LOGS
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch; do not use any
phone in your building.
•Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a quali-
fied installer, service agency, or the gas supplier.
Save this manual for future reference.
For more information, visit www.desatech.com
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual for correct installation
and operational procedures. For assistance or additional information consult a qualified installer, service
agency, or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses
air (oxygen) from the room in which it is installed.
Provisions for adequate combustion and ventilation air
must be provided. Refer to
Ventilation
section on page 4 of this manual.
Air for Combustion and
This appliance may be installed in an aftermarket,*
permanently located, manufactured (mobile) home,
where not prohibited by local codes.
This appliance is only for use with the type of gas
indicated on the rating plate. This appliance is not
convertible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the
manufacturer
TABLE OF CONTENTS
Safety Information ............................................... 3
Local Codes ........................................................ 4
Warranty Information.......................... Back Cover
SAFETY INFORMATION
WARNING: This product contains and/or generates 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 fireplace. Improper use of this fireplace can
cause serious injury or death
from burns, fire, 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 flu, with headaches, dizziness, or nausea. If you have these signs,
the fireplace may not be working properly. Get freshair at once! Have fireplace serviced. Some people
are more affected by carbon monoxide than others.
These include pregnant women, people with heart
or lung disease or anemia, those under the influence
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 the gas. 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 fireplace.
WARNING: Any change to
this heater or its controls can be
dangerous.
WARNING: Do not allow fans
to blow directly into the fireplace.
Avoid any drafts that alter burner
flame patterns. Ceiling fans can
create drafts that alter burner
flame patterns. Altered burner
patterns can cause sooting.
WARNING: Do not use a
blower insert, heat exchanger insert, or other accessory not approved for use with this fireplace.
Due to high temperatures, the
appliance should be located out
of traffic and away from furniture and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Fireplace front and screen become very hot when running fireplace. Keep children and adults
away from hot surfaces to avoid
burns or clothing ignition. Fireplace will remain hot for a time
after shutdown. Allow surfaces
to cool before touching.
Carefully supervise young children when they are in the room
with fireplace.
You must operate this fireplace
with the fireplace screen and
hood in place. Make sure fireplace screen and hood are in
place before running fireplace.
Keep the appliance area clear
and free from combustible materials, gasoline, and other flammable vapors and liquids.
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).
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3
SAFETY INFORMATION
Continued
3. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do not
use any phone in your building
• immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions
• if you cannot reach your gas supplier, call
the fire department
4. This fireplace shall not be installed in a bedroom or bathroom.
5. Do not use this fireplace as a wood-burning
fireplace. Use only the logs provided with the
fireplace.
6. Do not add extra logs or ornaments such as
pine cones, vermiculite, or rock wool. Using
these added items can cause sooting. Do not
add lava rock around base. Rock and debris
could fall into the control area of fireplace.
7. This fireplace is designed to be smokeless. If
logs ever appear to smoke, turn off fireplace
and call a qualified service person.
ing initial operation, slight smoking could
occur due to log curing and fireplace burning
manufacturing residues.
8. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 20.
9. 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.
10. This fireplace needs fresh air ventilation to
run properly. This fireplace has an Oxygen
Depletion Sensing (ODS) safety shutoff system. The ODS shuts down the fireplace if not
enough fresh air is available. See Air for Com-bustion and Ventilation, pages 6 through 8. If
fireplace keeps shutting off, see Troubleshoot-ing, pages 21 through 24.
11. Do not run fireplace
• where flammable liquids or vapors are used
or stored
• under dusty conditions
12. Do not use this fireplace to cook food or burn
paper or other objects.
Note:
Dur-
13. Do not use fireplace if any part has been exposed to or under water. Immediately call a
qualified service technician to inspect the fireplace and to replace any part of the control
system and any gas control which has been
under water.
14. Do not operate fireplace if any log is broken.
Do not operate fireplace if a log is chipped
(dime-sized or larger).
15. Turn fireplace off and let cool before servicing. Only a qualified service person should
service and repair fireplace.
16. Operating fireplace above elevations of 4,500
feet could cause pilot outage.
17. To prevent performance problems, do not use
propane/LP fuel tanks of less than 100 lbs.
capacity (propane/LP units only).
18. Provide adequate clearances around air
openings.
LOCAL CODES
Install and use fireplace with care. Follow all local codes. In the absence of local codes, use the
latest edition of The National Fuel Gas Code ANSIZ223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
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PRODUCT
IDENTIFICATION
Middle Log
Front
Log
Front Burner
Figure 1 - Log Base Assembly, Split Oak Set
Top Louver
Assembly
Fireplace
Hood
Firebox
Support
Screen
Assembly
Bottom Louver
Assembly
Figure 2 - Fireplace
Rear Burner
Rear
Log
Top Outer
Casing
Blower
Assembly
UNPACKING
CAUTION: Do not remove
the data plates attached to the
heater base assembly. The data
plates contain important warranty and safety information.
1. With utility knife, cut the carton all the way
around above the staples on the bottom tray.
Lift the carton off the heater. Remove packing.
Note:
on the right hand side of the heater front. Lift
the heater off the bottom tray.
The hood is located in the packing
2. Locate two screws above top corners of the
fireplace screen. Remove and discard these
screws. Lift fireplace screen up and pull out
to remove.
3. Remove protective packaging applied to logs,
log base assembly, and fireplace.
4. Remove fireplace hood from carton insert.
5. Check all items for any shipping damage. If
damaged, promptly inform dealer where you
bought fireplace.
PRODUCT FEATURES
OPERATION
This vent-free fireplace is clean burning. It requires
no outside venting. There is no heat loss out a vent
or up a chimney. Heat is generated by both realistic flames and glowing embers. When used without the blower, the fireplace requires no electricity making it ideal for emergency backup heat.
SAFETY DEVICE
This fireplace 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 system shuts off the fireplace if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This fireplace has a piezo ignitor. This system requires no matches, batteries, or other sources to
light fireplace.
BLOWER ASSEMBLY
This fireplace has a blower assembly. The blower
operates thermostatically and has a variable speed
control. The blower circulates heated air from the
fireplace into the room. Use of blower is optional.
THERMOSTAT CONTROL
This fireplace has a thermostat sensing bulb and a
control valve. The thermostat controls the heat
output and flame height. This maintains a consistent room temperature. Even the lowest setting
provides realistic flames and glowing embers from
two burners. Selecting higher comfort settings allows fireplace to run longer, producing greater heat
output. At lower comfort settings, the fireplace will
run less. This results in increased heating comfort. This can also result in lower gasbills.
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5
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a confined space
or unusually tight construction
unless provisions are provided
for adequate combustion and ventilation air. 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 efficient 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 efficient, 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, fireplaces, 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, Section 5.3, Air
for Combustion and Ventilation.
All spaces in homes fall into one of the three following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 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 unusually tight
construction, you must provide additional fresh air.
Unusually tight construction is defined 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 (6 x 10
or less with openings gasketed or
sealed
and
b. weather stripping has been added on
openable windows and doors
c. caulking or sealants are applied to ar-
eas such as joints around window and
door frames, between sole plates and
floors, 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
page 6
If your home does not meet all of the
three criteria above, proceed to
Ventilation Air From Outdoors
.
-11
kg per pa-sec-m2)
and
Determining Fresh-Air Flow for Fireplace Location
, below.
Confined Space and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/NFPA
54 defines a confined space as a space whose vol-
ume 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 unconfined space as a space whose volume is not
less than 50 cubic feet per 1,000 Btu per hour (4.8
m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.
* Adjoining rooms are communicating only if there
are doorless passageways or ventilation grills between them.
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Use this work sheet to determine if you have a
confined or unconfined space.
Space: Includes the room in which you will install
fireplace plus any adjoining rooms with doorless passageways or ventilation grills between 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:
(width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)
Space size 20 ft. (length) x 16 ft.
,
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AIR FOR COMBUSTION
AND VENTILATION
Continued
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:
51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in
the space.
Vent-free fireplace__________ Btu/Hr
Gas water heater*__________ Btu/Hr
Gas furnace__________ Btu/Hr
Vented gas heater__________ Btu/Hr
Gas fireplace logs__________ Btu/Hr
Other gas appliances* + __________ Btu/Hr
Total = __________ Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors
and vents to the outdoors.
Example:
Gas water heater______________ Btu/Hr
Vent-free fireplace ______________ Btu/Hr
Total______________ Btu/Hr
4. Compare the maximum Btu/Hr the space can
support with the actual amount of Btu/Hr used.
Example:
The space in the above example is a confined 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:
A. Rework worksheet, adding the space of an adjoin-
ing room. If the extra space provides an unconfined 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 Ventila-
tion Air From Outdoors, page 8.
C. Install a lower Btu/Hr fireplace, 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.
2560 cu. ft. (volume of space) x 20 =
+ 28,000
= 68,000
________
________
Btu/Hr (maximum the space can support)
Btu/Hr (actual amount of Btu/Hr used)
51,200 Btu/Hr (maximum the space
can support)
73,000 Btu/Hr (actual amount of
Btu/Hr used)
40,000
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/NFPA 54 Section
5.3
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
unconfined space, you must provide 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 3).
You can also remove door into adjoining room (see
option 3, Figure 3). Follow the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for
Combustion and Ventilation for required size of
ventilation grills or ducts.
12"
Ventilation
Grills
Into Adjoining
Room,
Option 1
Or
Remove
Door into
Adjoining
Room,
Option
3
Figure 3 - Ventilation Air from Inside
Ventilation Grills
Into Adjoining Room,
12"
Building
Option 2
.
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7
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 floor. 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,
Section 5.3, Air for Combustion and Ventilation
for required size of ventilation grills or ducts.
IMPORTANT:
or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic
will activate the power vent.
Outlet
Air
Inlet
Air
Figure 4 - Ventilation Air from Outdoors
Do not provide openings for inlet
Outlet
Air
Inlet Air
Ventilated
Attic
Crawl Space
Ventilated
To Attic
To
Crawl
Space
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.
WARNING: A qualified service person must install fireplace. Follow all local codes.
WARNING: Never install the
fireplace
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 42 inches
from the front, top, or sides of
the fireplace
• in high traffic areas
• in windy or drafty areas
WARNING: These models have
a three-prong, grounded electrical plug. This plug helps protect
you against electrical shock. Only
connect plug to a properly
grounded, three-prong receptacle.
Do not cut or remove the grounding prong from this plug.
CAUTION: This fireplace creates warm air currents. These
currents move heat to wall surfaces next to fireplace. Installing fireplace next to vinyl or cloth
wall coverings or operating
heater where impurities (such
as, but not limited to, tobacco
smoke, aromatic candles, cleaning fluids, oil or kerosene lamps,
etc.) in the air exist, may discolor walls or cause odors.
Note:
Your fireplace is designed to be used in zero
clearance installations. Wall or framing material
can be placed directly against any exterior surface
on the rear, sides, or top of your fireplace, except
where standoff spacers are integrally attached. If
standoff spacers are attached to your fireplace,
these spacers can be placed directly against wall
or framing materials.
Use the dimensions shown for rough openings to
create the easiest installation (see Built-In Fire-place Installation, page 11).
8
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INSTALLATION
Continued
IMPORTANT:
the air. Although this is beneficial, installing fireplace in rooms without enough ventilation air may
cause mildew to form from too much moisture.
See Air for Combustion and Ventilation, pages 6
through 8.
IMPORTANT:
fireplace is not level, log set will not work properly.
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP).
If your gas supply is not correct, do not install fireplace. Call dealer where you bought fireplace for
proper type fireplace.
is equipped for (natural or propane/LP) gas. Field conversion
is not permitted.
ELECTRICAL HOOKUP
This fireplace has a blower assembly with an electrical cord. The electrical cord is five feet in length.
You must locate fireplace within reach of a 120volt grounded electrical outlet. If not, you must
install an electrical outlet within reach of fireplace
power cord. The GA3555 outlet accessory may
be used for built-in installation when a blower is
installed.
INSTALLING HOOD
Install hood to rail already installed in fireplace as
shown in Figure 5. Use 3 Phillips screws provided.
Rail
Hood
Vent-free heaters add moisture to
Make sure the fireplace is level. If
WARNING: This appliance
ASSEMBLING AND ATTACHING
OPTIONAL PERIMETER TRIM
(Included with Mantel Accessory)
IMPORTANT:
a wall, do not attach trim at this time. See page 10
for built-in fireplace installation.
Note:
The instructions below show assembling
and attaching trim to fireplace.
1. Remove packaging from three pieces of trim.
2. Locate four screws, two adjusting plates with
set screws, and two shims in the hardware packet.
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 trim (see Figure 6).
5. Slide other end of adjusting plate/shim in slot
on mitered edge of side trim (see Figure 6).
6. While firmly holding edges of trim together,
tighten both set screws on the adjusting plate
with slotted screwdriver.
7. Repeat steps 1 through 6 for other side.
8.
Tighten trim hanging screws (#10 x 6.25 shoulder) into holes in cabinets. Place the assembled
trim onto fireplace cabinet. Align hanging notches
on trim with hanging screws on side of fireplace
(see Figure 7). Push trim firmly into place, sliding hanging notches over hanging screws.
Side Trim
Slot
Figure 6 - Assembling Perimeter Trim
If you are recessing the firebox in
Adjusting
Plate
Mitered Edge
Set Screws
Top
Trim
Shim
Slot
Trim Hanging
Screws
Screw
113135-01A
Figure 5 - Installing Hood
Assembled
Trim
Figure 7 - Attaching Perimeter Trim to
www.desatech.com
Hanging Notches
on Trim
Fireplace
9
INSTALLATION
Continued
INSTALLATION CLEARANCES
WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from
floor, ceiling, and adjoining wall.
Carefully follow the instructions below. This will
ensure safe installation.
Minimum Clearances For Side
Combustible Material, Side Wall, and
Ceiling
A. Clearances from the side of the fireplace cabi-
net to any combustible material and wall
should follow diagram in Figure 8.
Example:
etc. is made of combustible material and protrudes 3 1/2" from the wall. This combustible
material must be 4" from the side of the fireplace opening (see Figure 8).
B. Clearances from the top of the fireplace open-
ing to the ceiling should not be less than 42
inches.
*Minimum 16 inches from Side Wall
Figure 8 - Minimum Clearance for
CONVENTIONAL FIREPLACE
INSTALLATION
Conventional installation of this fireplace involves
installing fireplace along with the corner or cabinet mantel with hearth base accessories against a
wall in your home (see Accessories, pages 30 and
31). Follow the instructions below to install the
fireplace in this manner.
Note:
using the cabinet mantel and the G3000F/G3001U/
G3004W/G3006F/G3007U series hearth base accessories. The hearth base accessory shown is
optional for this installation. You can install fireplace and cabinet/corner mantel directly on the
The face of a mantel, bookshelf,
Example
*
Combustible to Wall
The instructions below show installation
floor. The corner mantel accessory cannot be installed with the G3000F/G3001U/G3004W/
G3006F/G3007U hearth base. The corner mantel
can be paired with the G3008F/G3009U/G3010F
corner hearth base. If mounting fireplace and cabinet or corner mantel to the floor, an optional G3005
Slim Base kit may be installed.
1. Assemble cabinet mantel, hearth base, and
trim accessories. Assembly instructions are included with each accessory.
2. When installing blower, install a properly
grounded, 120 volt three-prong electrical outlet at fireplace location if an outlet is not there.
If possible, locate outlet so cabinet mantel will
cover it when installed (see Figure 9).
3. Install gas piping to fireplace location. This
installation includes an approved flexible gas
line (if allowed by local codes) after the equipment shutoff valve. The flexible gas line must
be the last item installed on the gas piping.
See Installing Gas Piping to Fireplace Loca-tion, page 12.
4. Place hearth base accessory against wall at installation location. Cut an access hole in hearth
top to run gas line to fireplace (see Figure 9).
Make sure to locate access hole so cabinet
mantel will cover it when installed.
can secure base to floor using wood screws.
Countersink screw heads and putty over.
5. Route gas line through access hole in hearth base.
6. Center cabinet mantel on hearth base (see Figure 10, page 11). Make sure mantel is flush
against wall.
7. Break off nailing flanges (see Figure 11, page
11) with hammer or pliers.
8. Place cardboard or other protective material
on top of hearth base. Carefully set fireplace
on protective material, with back of fireplace
inside mantel opening.
Electrical
Outlet
Hearth
Base
Rigid Pipe
and Gas
Shutoff Valve
Note:
You
Gas Line
Access
Hole
Figure 9 - Placing Hearth Base
Accessory Against Wall
10
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