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 Air for Combustion and Ventilation
section on page 6 of this manual.
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
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-fired 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 Common
wealth of Massachusetts.
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TABLE OF CONTENTS
Safety Information ............................................... 3
Parts Central ..................................................... 45
Service .............................................. 33
30
43
111245-01B
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 head
aches, dizziness or nausea. If you have these signs,
the heater may not be working properly. Get fresh air at once! Have heater 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 pro-
pane/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 warn
ings. Keep this manual for reference. It is your
guide to safe and proper operation of this heater.
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 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.
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
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away from hot surface 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 heater. When using the handheld remote accessory keep selector switch in the OFF position
to prevent children from turning
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on burners with remote.
You must operate this fireplace
with the fireplace screen and
hood in place. Make sure fireplace screen and hood are in
place before running heater.
Keep the appliance area clear
and free from combustible ma
terials, gasoline and other flam
mable vapors and liquids.
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SAFETY INFORMATION
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) in
side any structure. Locate propane/LP supply
tank(s) outdoors (propane/LP units only).
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
neighborʼs phone. Follow the gas supplierʼs
instructions
• if you cannot reach your gas supplier, call
the fire department
4. This fireplace shall not be installed in a bed
room 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. To prevent the creation of soot, follow the instruc
tions in Cleaning and Maintenance, page 29.
8. 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.
9. This fireplace needs fresh air ventilation to run
properly. This fireplace has an Oxygen Deple
tion Sensing (ODS) safety shutoff system. The
ODS shuts down the fireplace if not enough
fresh air is available. See Air for Combustion and Ventilation, page 6. If fireplace keeps
shutting off, see Troubleshooting, page 30.
10. Do not run fireplace
• where flammable liquids or vapors are used
or stored
• under dusty conditions
11. Do not use this fireplace to cook food or burn
paper or other objects.
12. 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.
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13. Do not operate fireplace if any log is broken.
Do not operate fireplace if a log is chipped
(dime-sized or larger).
14. Turn fireplace off and let cool before servicing.
Only a qualified service person should service
and repair fireplace.
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15. Operating fireplace above elevations of 4,500
feet could cause pilot outage.
16. To prevent performance problems with pro
pane/LP units, do not use propane/LP fuel
tanks of less than 100 lb. capacity.
17. Prov ide adequa te clearance s around air
openings.
PRODUCT
IDENTIFICATION
Log Set
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Manual
Override
Handle
Remote
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Control
Figure 1 - Fireplace Floor Assembly
Top Louver Assembly
Firebox
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Hood
Firebox
Support
Screen
Assembly
Piezo
Ignitor
Wall Switch
Assembly
Bottom Louver
Assembly
Figure 2 - Fireplace
Manual Ignition
Bypass Switch
Blower Assembly
(Optional)
Top Outer
Casing
111245-01B
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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, ANSI Z223.1/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
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: The hood is located in the packing on
the right hand side of the heater front. Lift the
heater off the bottom tray.
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 optional 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 heat
ers. 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.
WIRELESS REMOTE CONTROL
This fireplace features an infrared wireless remote
control. This control system can be used to auto
matically light the pilot and adjust the burner flame
height at the push of a button.
WIRED WALL-MOUNTED REMOTE
CONTROL
This fireplace features a two-button wall switch assembly with glowing LEDʼs. The wall switch per
forms the same functions as the wireless hand-held
remote control with the added feature of LEDʼs for
visual feedback of operation and status.
OPTIONAL BLOWER ASSEMBLY
ACCESSORY
This fireplace accepts an optional blower assembly
(not included). The GA3650T/GA3700T Series
blower operates thermostatically and features a
variable speed control. The GA3700/GA3750
Series operates manually and also features a variable speed control. The blower circulates heated
air from the fireplace into the room. Use of blower
is optional. See Accessories, page 40.
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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.
Todayʼs 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 effi
cient, 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 fol
lowing 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
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 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 these three
criteria, 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
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Fresh-Air Flow For Fireplace Location.
Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/NFPA
54 defines a confined space as a space whose
volume is less than 50 cubic feet per 1,000 Btu
per hour (4.8 m
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
3
(4.8 m
per kw) of the aggregate input rating of
all appliances installed in that space. Rooms com
municating 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.
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kg per pa-sec-m2) or
3
per kw) of the aggregate input
DETERMINING FRESH-AIR FLOW
FOR FIREPLACE 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.
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111245-01B
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation 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 18 ft.
(width) x 8 ft. (ceiling height) = 2880 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: 2880 cu. ft. (volume of space) x 20 =
57,600 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in
the space.
Vent-free fireplace ___________
Gas water heater* ___________
Gas furnace ___________
Vented gas heater ___________
Gas fireplace logs ___________
Other gas appliances* + ___________
Total = ___________
* Do not include direct-vent gas appliances. Di
rect-vent draws combustion air from the outdoors
and vents to the outdoors.
Example:Gas water heater ________
Vent-free fireplace + ________
Total = ________
40,000
33,000
73,000
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
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.
WARNING: If the area in
which the fireplace 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 un
confined 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
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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.
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: 57,600 Btu/Hr (maximum the space
can support)
73,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the above example is a confined space
because the actual Btu/Hr used is more than the maxi
mum 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.
111245-01B7
Figure 3 - Ventilation Air from Inside
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Building
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Outlet
Air
Ve
ntilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air
Ventilated
Crawl Space
To
Crawl
Space
To 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 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: Do not provide openings for inlet
or outlet air into attic if attic has a thermostatcontrolled power vent. Heated air entering the attic
will activate the power vent.
Figure 4 - 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 pri
mary 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 fire
place. Follow all local codes.
8
WARNING: A qualified ser-
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WARNING: Never install the
fireplace
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, f urni ture,
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
CAUTION: This fireplace creates warm air currents. These
currents move heat to wall sur
faces next to fireplace. Installing
fireplace next to vinyl or cloth
wall coverings or operating
fireplace where impurities (such
as, but not limited to, tobacco
smoke, aromatic candles, clean
ing 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 Fireplace Installation, page 21).
IMPORTANT: Vent-free heaters add moisture to
the air. Although this is beneficial, installing fire
place in rooms without enough ventilation air may
cause mildew to form from too much moisture. See
Air for Combustion and Ventilation
IMPORTANT: Make sure the fireplace is level.
If fireplace is not level, log set will not work
properly.
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP)
for your unit. If your gas supply is not correct, do
not install fireplace. Call dealer where you bought
fireplace for proper type fireplace.
, page 6.
111245-01B
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-
INSTALLATION
Continued
WARNING: This appliance
is equipped for (natural or propane/LP) gas. Field conversion
is not permitted.
ELECTRICAL HOOKUP
Thi s fir ep lace normally operates under 120
VAC/60 Hz line voltage. The electrical cord sup
plied with your fireplace is five feet in length. You
must locate fireplace within reach of a 120 volt
grounded electrical outlet. If not, you must install
an electrical outlet within reach of the fireplace
power cord. The GA3555 outlet accessory may
be used for built-in applications.
INSTALLATION CLEARANCES
WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from
floor, ceiling and adjoining wall.
MINIMUM CLEARANCE TO
COMBUSTIBLE MATERIALS
Top Left and Bottom
Right Sides and Rear
0" 16" 0"
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
cabinet to any combustible material and wall
should follow diagram in Figure 5.
Example: The face of a mantel, bookshelf,
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 cabinet (see Figure 5).
B. Clearances from the top of the fireplace open
ing to the ceiling should not be less than 42
inches.
Example
*Minimum 16 inches from Side Wall
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Figure 5 - Minimum Clearance for
Combustible to Wall
INSTALLATION SEQUENCE
After unpacking fireplace (see Unpacking, page 4),
we suggest that you install your fireplace system
in the following sequence:
1.
Removal of fireplace floor assembly (required)
2.
Electrical connections for power cord (required)
3. Relocating wall switch (optional)
4. Installing blower accessory (optional)
5.
Connecting fireplace to gas supply (required)
6. Checking gas connections (required)
7. Firebox installation, conventional or built-in
(required)
8. Installing brass perimeter trim (optional)
9. Installing fireplace hood (required)
10. Installing logs (required)
11. Installing fireplace screen (required)
Use the following instruction s to comp le te
each step.
REMOVING FIREPLACE SCREEN
AND FLOOR ASSEMBLY
NOTICE: Shutoff gas supply
and disconnect heater from gas
supply if installing blower into
previously installed fireplace.
Contact a qualified service person to do this.
1. Remove fireplace screen. Remove two screws
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that hold fireplace screen in place for shipping.
These screws are located near top of screen.
Discard screws. Lift fireplace screen up and
pull out to remove.
2. If logs are installed, carefully remove the logs
and set aside, noting the properly mounted
location of each.
*
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INSTALLATION
Continued
3. Remove screws that attach fireplace floor assembly to fireplace. Open lower louver door.
Carefully lift up fireplace floor assembly and
remove from fireplace, taking care to pull
flexible gas line through the access holes (see
Figure 6). Note: Be careful of all wires on
underside of log base.
CAUTION: Do not pick up
fireplace floor assembly by burners. This could damage burners.
Only handle base by grates.
Flexible Gas Line
Screws
Fireplace Floor
Assembly
Figure 6 - Removing Fireplace Floor
Assembly
ELECTRICAL CONNECTIONS FOR
POWER CORD
This fireplace operates on 120 VAC, 60 Hz
power. An electrical power cord is supplied with
this unit.
For Mantel Installation
1. Determine from which side of the fireplace the
power cord will exit. Locate the 1.5" diameter
hole near the center of floor support bracket on
appropriate side of lower cavity (see Figure 7).
2. Locate power cord. Remove wire tie or tape
holding plug end of power cord.
3. Power cord has 2 plastic hole bushings
threaded onto it. Route cordʼs 3-prong plug
through the 1.5" diameter hole in appropriate
floor support bracket.
4. Push first plastic bushing completely through
hole. Squeeze bushing as needed to do this.
5. Install the second plastic bushing into the
hole in the floor support bracket by snapping
into place.
6. Route the 3-prong plug through the 1.5" hole
in fireplace outer casing.
7. Install the first plastic bushing into this hole
by snapping into place.
8. After you have connected to gas supply and
checked your gas connections (see pages 17
through 20), plug power cord into any conve
nient 3-prong grounded wall receptacle near
fireplace.
For Recessed Installation
If an outlet is not installed in fireplace, install
model GA3555 - Outlet Kit with Cover. This
kit will supply a convenient 3-prong grounded
electrical outlet for power. Refer to installation
manual provided with this optional accessory for
instructions on wiring.
must make all electrical connections.
Hole in Floor
Support Bracket
Bushings
Figure 7 - Routing Power Cord
Note: A qualified installer
Hole in Outer
Casing
Power
Cord
RELOCATING WALL SWITCH
ASSEMBLY
Note: The decorative wall switch plate supplied
is white. The wall switch plate may be painted to
match your decor.
The push-button switch and decorative wall
plate assembly supplied with your fireplace is
pre-mounted at the factory in the lower cavity of
the fireplace. You may relocate this wall switch
assembly to a more convenient location such as the
side of your mantel or directly onto the wall near
the fireplace. To mount the wall switch assembly,
you must first cut openings in the mantel or wall
where the switch will be located.
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111245-01B
INSTALLATION
Continued
Note: If you choose to relocate the wall switch
assembly, do so before final installation into a
mantel or recessing into a wall. If you are installing
an optional blower accessory, install it at the same
time you relocate the wall switch assembly.
CAUTION: The wall switch
assembly must never be mounted directly above the fireplace
where heat may damage it. If you
relocate wall switch assembly
from lower fireplace cavity, it
must be mounted either on side
wall of mantel or on wall to side
of fireplace.
For Recessed Installation
If fireplace is to be recessed into a wall (see
Built-In Fireplace Installation, page 21), we
recommend mounting wall switch assembly to
left side of fireplace. The wall switch assembly
should be mounted approximately 12" from left
edge of fireplace and less than 60" from the floor.
IMPORTANT: Do not locate wall switch assembly
directly in front of wall stud - there must be room
behind wall board for wires from switch. If you
choose to locate wall switch assembly to right side
of fireplace, the length of the cord restricts you to
less than 6" from right edge of fireplace and less
than 48" from floor.
For Mantel Installation
If fireplace is to be installed into a mantel, (see
Conventional Fireplace Installation, page 20) the
wall switch assembly may be mounted on either
side of the mantel, facing to the side. Do not locate
wall switch assembly anywhere on the front face
of the mantel.
CAUTION: Be careful of gas
lines and wiring when moving
floor.
1. Determine the new location for the wall switch
assembly. The wires attached to switch are six
feet long.
2. Remove 2 screws securing plastic wall switch
assembly to bracket in fireplace lower cavity.
Save screws.
3. Remove wire tie holding coiled wire attached
to wall switch assembly (see Figure 8).
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4. Remove wall switch assembly from bracket.
5. Carefully pass wall switch assembly and cord
through large elongated hole in rear of either
left or right floor support bracket, depending on
desired location of switch. Pass wall switch as
sembly and cord through 1.5" diameter hole in
side of fireplace outer casing (see Figure 9).
6. Pull wall switch assembly and cord from
fireplace making sure wall switch assembly
will reach desired mounting location without
straining cord assembly.
If you are mounting wall switch assembly to a
wall, continue reading. If you are mounting your
wall switch assembly to the side of the mantel,
see page 12.
Burner
Outlet
Tube
Figure 8 - Relocating Wall Switch
Hole in
Outer
Casing
Wall Switch
Assembly
Figure 9 - Routing Wall Switch Assembly
Through Fireplace for Relocation
Mounting Wall Switch Assembly to Wall
for Recessed Fireplace
7. Create three openings on wall according to
Template 1, page 41. This is best done by
making a pattern to work with on your wall.
Carefully cut page 41/42 from manual and
tape paper template vertically onto wall at
preferred location. Pierce the paper at the centers of the 2 holes with a nail or sharp pencil,
leaving a mark on the wall. Do the same at
centers of the four circles near the corners of
the rectangle.
Firebox
Bottom
Wire
Tie
Gas Control
Valve
Assembly
Wall Switch
Assembly
Hole in Floor
Support Bracket
-
4 3/4"
3 3/4"
3/8"
3/16"
3/4"
3/8"
Diameter
2 Holes
INSTALLATION
Continued
8. Remove paper template from wall.
9. Drill 3/8" holes at each mark.
10. Using a straight edge and pencil, connect the
outer edges of the 4 holes for the rectangle (see
Figure 10). This will give you cutting lines for
the rectangle you will cut in the wall.
11. Using a keyhole saw, hack saw blade, drill,
file or other suitable tool, carefully cut out the
rectangular opening. Note: The corners of the
rectangle may be round. IMPORTANT: Do not
exceed the size of the rectangle on template.
12. From inside the recessed opening for the
fireplace, carefully pass wall switch assembly
through the rectangular opening to the outside
of the wall.
13. Using wall anchors supplied in hardware pack
age, fold wall anchor as shown in Figure 11.
14. Insert wall anchor, wings first, into hole. Tap
anchor flush to wall.
15. For thin walls (1/2" or less), insert red key into
wall anchor. Push red key to “pop” open anchor
wings. See Figure 12. IMPORTANT: Do not
hammer key! For thick walls (over 1/2" thick),
do not pop open wings.
Make
Marks at
Centers
of Holes
Template
from This
Manual
Figure 10 - Using Template for Wall
Switch Assembly Installation
Figure 11 - Folding
Anchor
12
Figure 12 - Popping
Open Anchor Wings
for Thin Walls
16. Position wall switch assembly vertically over
wall openings with decal lettering upright (see
Figure 13).
17. Insert mounting screws, removed in step
2 of Relocating Wall Switch Assembly on
page 10, through holes in wall plate and
into wall anchors.
18. Tighten screws until wall plate is firmly at
tached to wall. Do not overtighten.
-
Figure 13 - Securing Wall Switch
Mounting Wall Switch Assembly to Side
of Mantel
7. Create three openings in the mantel wall according to Template 2, page 41. This is best
done by making a pattern to work with on the
Cutting
Lines
mantel. Carefully cut page 39/40 from manual
and tape paper template vertically onto mantel
wall at preferred location. Pierce the paper at
the centers of the 2 holes with a nail or sharp
pencil, leaving a mark on the wall. Do the
same at centers of the four circles near the
corners of the rectangle.
8. Remove paper template from mantel wall.
9. Drill 1/8" pilot holes at each mark for top and
bottom screw holes. Drill 3/8" holes at each
mark for centers of four circles near corners
of rectangle.
10. Using a straight edge and pencil, connect the
outer edges of the 4 holes for the rectangle (see
Figure 10). This will give you cutting lines for
Tape
the rectangle you will cut in the mantel wall.
11. Using a keyhole saw, hack saw blade, drill,
file or other suitable tool, carefully cut out the
rectangular opening. Note: The corners of the
rectangle may be round. IMPORTANT: Do not
exceed the size of the rectangle on template.
12. Carefully pass wall switch assembly through
rectangular opening from inside mantel (see
Figure 13).
www.desatech.com
-
Opening in Wall
or Mantel Wall
Wall Switch
Assembly
Screws
Assembly
111245-01B
INSTALLATION
Continued
13. Position wall switch assembly vertically over
opening with decal lettering upright. Make
sure wires freely pass through wall without
binding. Align holes in wall plate with 1/8"
pilot holes in mantel wall.
14. Drive mounting screws, removed in step 2 of
Relocating Wall Switch Assembly on page 10,
through wall plate holes and into pilot holes
in mantel wall.
15. Tighten screws until wall switch assembly is
firmly attached to mantel. Do not overtighten.
INSTALLING VARIABLE SPEED
BLOWER ACCESSORY
NOTICE: Shut off gas supply and
disconnect heater from gas supply
if installing blower into previously
on the exit side (see Figure 16). Install the
second plastic bushing provided into the
1.5" hole in the outer casing through which
the power cord will exit. Route power cord
through both plastic bushings and plug
the power cord into a properly grounded
3-prong wall receptacle near the firebox.
b. If your fireplace system installation is
recessed and if an outlet is not installed
in your fireplace, you must install the
GA3555 Outlet kit with cover in your
fireplace which will supply a convenient
3-prong grounded electrical outlet for
your blower. Refer to the installation
manual provided with the model GA3555
accessory for instructions on wiring the
duplex outlet.
must make all electrical connections.
Blower
Note: A qualified installer
installed fireplace. Contact a qualified service person to do this.
1. If fireplace screen and floor are still installed,
see Removing Fireplace Screen and Floor Assembly, page 9.
2. Attach the power cord to the blower motor
by firmly pushing the two female terminals at
the end of the power cord onto the two spade
terminals on the blower motor.
3. Attach green ground wire from power cord
to blower housing using screw provided (see
Figure 14). Tighten screws securely.
4. Place the blower against lower rear wall of
firebox outer wrapper with the exhaust port
directed upward. Align the holes in top mount
ing tabs of blower with holes in wall of wrap
per (see Figure 14). Using 2 screws provided,
mount blower and tighten screws securely.
5. Be certain that all wire terminals are securely at
tached to terminals on blower motor and that the
screw retaining the green ground wire is tight.
6. Place control knob provided on plastic control
shaft of speed control.
7. Mount the speed control on the front leg of
the left floor support bracket using 2 screws
provided (see Figure 15).
8. Plug in blower power cord.
a. If your fireplace system is installed as a
freestanding unit with an accessory man
tel, determine whether the power cord will
exit the left side or the right side of the fire
box. Install 1 plastic bushing provided into
the 1.5" hole in the floor support bracket
111245-01B13
www.desatech.com
Screws
Exhaust
Port
Screw
Green Ground Wire
-
-
Figure 14 - Mounting Blower to Firebox
Left Floor
Support Bracket
-
Screws
Speed
Control
-
Knob
-
Figure 15 - Attaching Speed Control to
Control
Control
Shaft
Firebox
Lower Rear
Wall of Firebox
Top
Mounting
Tab
INSTALLATION
V
a
r
i
a
b
l
e
F
a
n
S
w
i
t
c
h
W
h
it
e
W
h
it
e
B
l
a
c
k
G
r
e
e
n
O
n
1
1
0
/
1
1
5
V
.A
.
C
.
Bl
ower
Moto
r
B
l
a
c
k
B
l
a
c
k
B
l
a
c
k
O
f
f
Variable
Fan Switch
White
White
Black
Green
On
11
0/115
V.
A.C.
Blower
Motor
Black
Black
Black
Off
Continued
9. Check to make sure that all electrical cords
are completely clear of the blower wheel
and that there are no other foreign objects in
blower wheel. Turn blower on and check for
operation. Turn blower off by rotating knob
fully counterclockwise before continuing.
CAUTION: Never touch the
blower wheel while in operation.
10. Peel off backing paper and stick supplied
wiring diagram decal near center of firebox
bottom (Figure 17).
11. If gas connection s have been made and
checked, replace fireplace floor assembly.
Feed flexible gas supply line into fireplace
base area while replacing fireplace floor as
sembly. Make sure the entire flexible gas line
is in fireplace base area.
IMPORTANT: Do not pick up fireplace floor
assembly by burners. This could damage
burners. Only handle base by grates. Note:
Be careful of all wires and components on
underside of floor assembly.
12. Reattac h firepla ce floor asse mbly with
screws removed in step 3 of Removing Fireplace Screen and Floor Assembly, page 9.
Note: Discard the remaining hardware items.
After assembly, make sure all wires are com
pletely clear of blower wheel.
13. Install logs (see Installing Logs, page 24 and
fireplace screen (see Installing Screen, page
25).
WARNING: Failure to position
the parts in accordance with supplied diagrams or failure to use
only parts specifically approved
with this heater may result in
damage or personal injury.
WARNING: A qualified service
person must connect fireplace
to gas supply. Follow all local
codes.
-
Wiring
Diagram
-
-
Figure 17 - Location of Wiring Diagram
Decal 3" from Blower
Operating the Blower
Light your gas appliance with the blower off. After
about 15 minutes, turn the blower on to deliver
heated air at the top louvers. The blower features
a variable control which allows you to select the
speed you desire. Note: Periodically check the
louvers of the firebox and remove any dust, dirt
Right Floor
Support Bracket
Figure 16 - Installing Plastic Bushing for
14
Power Cord
Plastic
Bushing
www.desatech.com
or other obstructions.
111245-01B
INSTALLATION
Continued
INSTALLING THERMOSTATIC
BLOWER ACCESSORY
NOTICE: Shut off gas supply
and disconnect heater from gas
supply if installing blower in
previously installed fireplace.
Contact a qualified service person to do this.
1. If fireplace screen and floor are still installed,
see Removing Fireplace Screen and Floor Assembly, page 9.
2. Using screw provided, attach green ground
wire from speed control cord to blower hous
ing. Tighten screw securely (see Figure 18).
3. Place the blower against lower rear wall of
firebox outer wrapper with the exhaust port
directed upward. Align the holes in top mount
ing tabs of blower with holes in wall of wrapper
(see Figure 19). Using two #8 screws provided,
mount blower and tighten screws firmly.
4. Remove the three screws (do not discard) and
cover plate from center of firebox wrapper rear
wall. Discard this cover plate (see Figure 18).
Thermostatic Switch
and Cover Assembly
5. Mount the supplied thermostatic switch and
cover assembly into firebox wrapper wall. Do
this by feeding terminal ends of wire harness
into the hole. Allow wires to fall to bottom of
firebox cavity (see Figure 18).
6. Using three screws from step 7, attach switch
and cover assembly to firebox wrapper rear
wall. Tighten screws firmly (see Figure 18).
7. Firmly attach red wire from the thermostatic
switch and cover assembly to either of the ter
minals on the blower motor (see Figure 18).
8. Firmly attach black wire from speed control
cord to blue wire from thermostatic switch
and cover assembly (see Figure 18).
9. Firmly attach white wire from speed control
cord to remaining terminal on blower motor
(see Figure 18).
-
10. Place control knob provided on plastic control
shaft of speed control (see Figure 20).
11. Mount the speed control onto the front leg of
the left floor support bracket using 2 screws
-
provided (see Figure 20).
Lower Rear
Wall of
Blower
Firebox
-
#8 Screws
Exhaust
Port
Top
Blue Wire
Black
Wire
White
Wire
Speed Control
Green Wire
Figure 18 - Installing Switch and Cover
Assembly and Speed Control
111245-01B15
Red
Wire
Figure 19 - Mounting Blower to Firebox
Floor
Support
Bracket
Screws
Figure 20 - Attaching Speed Control
www.desatech.com
Control
Knob
Speed
Control
Mounting
Tab
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