Desa EFS10TNA, EFS10TPA, VMH10TNC, VMH10TPC User Manual
UNVENTED (VENT-FREE) GAS
COMPACT CLASSIC HEARTH® FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
Patent Pending
Shown with Optional Cabinet
Mantel/Hearth Base Accessory
THERMOSTAT MODELS:
VMH10TNC, VMH10TPC, EFS10TPA AND EFS10TNA
REMOTE-READY MODELS:
VMH10RNC, VMH10RPC, EFS10RPA AND EFS10RNA
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 7 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
Product Identification .......................................... 5
Unpacking ........................................................... 5
Product Features ................................................ 5
Optional Remote Control Accessories ................ 5
Assembly ............................................................ 6
Air for Combustion and Ventilation ...................... 7
Installation ........................................................... 9
Operating Fireplace .......................................... 23
Inspecting Burners ............................................ 29
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Cleaning and Maintenance ............................... 30
Troubleshooting ................................................. 31
Specifications .................................................... 35
Wiring Diagram ................................................. 35
Service Hints ..................................................... 35
Technical Service .............................................. 35
Replacement Parts ........................................... 35
Illustrated Parts Breakdown and Parts List ....... 36
Accessories ....................................................... 40
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.
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.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of car-
bon monoxide poisoning resemble the flu, with headaches, dizziness, or nausea. If you have these signs,
the fireplace may not be working properly. Get fresh
air 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 fireplace 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 fireplace.
Fireplace front and screen become very hot when running
heater. 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. When using the
hand-held remote accessory
(Remote-Ready Models Only),
keep selector switch in the OFF
position to prevent children from
turning on burners with remote.
You must operate this fireplace
with the fireplace screen in place.
Make sure fireplace screen is
closed before running fireplace.
Keep the appliance area clear
and free from combustible materials, gasoline, and other flammable 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) inside any structure. Locate propane/LP supply
tank(s) outdoors.
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 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 30.
9. Before using furniture polish, wax, carpet
cleaner, or similar products, turn fireplace 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 Combustion
and Ventilation, page 7. If fireplace keeps shutting off, see Troubleshooting, page 31.
11. Keep all air openings in front and at bottom
of heater clear and free of debris. This will
insure enough air for proper combustion.
Note:
Dur-
12. Do not run fireplace
• where flammable liquids or vapors are used
or stored.
• under dusty conditions.
13. Do not use this fireplace to cook food or burn
paper or other objects.
14. Never place any objects in the fireplace or
on logs.
15. Do not use fireplace if any part has been under
water. Immediately call a qualified service technician to inspect the room fireplace and to replace any part of the control system and any
gas control which has been under water.
16. Turn off and unplug fireplace and let cool before servicing. Only a qualified service person should service and repair fireplace.
17. Operating fireplace above elevations of 4,500
feet could cause pilot outage.
18. Do not operate fireplace if any log is broken.
Do not operate fireplace if a log is chipped
(dime-sized or larger).
19. To prevent performance problems, do not use
propane/LP fuel tank of less than 100 lbs.
capacity.
20. 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 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
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PRODUCT
IDENTIFICATION
Fireplace
Cabinet
Logs
Electronic
Ignitor Button
Control Knob
Screen
Logs
Flexible
Gas
Line
Remote
Selector
Switch
(Optional)
Control Knob
Remote Control
(Optional)
Figure 1 - Vent-Free Compact Classic
Electronic
Ignitor Button
Hearth® Fireplace
Flexible Gas
Line
Fireplace Cabinet
Screen
UNPACKING
1. Remove fireplace and hood from carton. Log
is wrapped and inside fireplace. Do not remove at this time.
2. Remove all protective packaging applied to
fireplace for shipment.
3. Make sure your fireplace includes one hardware packet.
4. Check fireplace for any shipping damage. If
fireplace is damaged, promptly inform dealer
where you bought fireplace.
PRODUCT FEATURES
SAFETY PILOT
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
fireplaces. The ODS/pilot shuts off the fireplace
if there is not enough fresh air.
ELECTRONIC IGNITOR
This heater has an electronic ignitor to light heater
fuel supply.
THERMOSTATIC HEAT CONTROL
FOR THERMOSTAT-CONTROLLED
MODELS
Thermostat-Controlled models have a thermostat
sensing bulb and a control valve. The thermostat
will automatically modulate the heat output to
maintain a consistent room temperature. This results in greater fireplace comfort. This can also
result in lower gas bills.
OPTIONAL REMOTE
CONTROL ACCESSORIES
(For Remote-Ready Models Only)
There are four optional remote controls that can
be purchased separately for Remote-Ready Models only:
• wall switch
• hand-held ON/OFF remote
• wall thermostat
• hand-held thermostat remote
See Accessories, page 40.
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ASSEMBLY
WARNING: Always have
screen in place before operating fireplace. This prevents excessive temperatures on fireplace surfaces.
WARNING: Failure to position the parts in accordance with
these diagrams or failure to use
only parts specifically approved
with this fireplace may result in
property damage or personal
injury.
ASSEMBLING FIREPLACE
Tools Required:
• Phillips screwdriver
• 5/16" hex wrench
• slotted screwdriver
• scissors
1. Remove two screws 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 (see
Figure 2). Set screen aside until installation
has been completed.
2. Cut two plastic straps to remove the log from
the firebox cavity.
3. An optional blower is available. See Acces-
sories, page 40. Install optional blower now.
Follow installation instructions provided with
blower. See Installing Optional Blower Ac-
cessory GA3450T on page 14.
4. Locate four black phillips sheet metal screws
from the hardware packet.
5. Rotate hood as shown in Figure 3. Make sure
hood tabs point toward fireplace.
6. Insert hood tabs between baffle and louvers
(see Figure 3).
7. Gently rotate hood to upright position. Make
sure hood tabs are behind louvers and hood is
resting on firebox top (see Figure 3).
8. Align screw holes on hood with screw holes
on firebox top.
9. Insert screws as shown in Figure 3. Tighten
screws firmly.
Hood Tabs
Hood
Louver
Hood Tab
Baffle
Sheet Metal
Screws
Firebox Top
Figure 3 - Assembling Hood
Shoulder
Screw
Screen
Figure 2 - Removing Screen
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AIR FOR COMBUSTION
VENTILATION
WARNING: This fireplace 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 7 through 9 will help you
classify your space and provide adequate ventilation.
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 and
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 these three
criteria, you must provide additional
fresh air. See
doors
, page 8
If your home does not meet all of the
three criteria above, proceed to
mining Fresh-Air Flow For Fireplace Location,
page 8.
Confined 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.
-11
kg per pa-sec-m2)
Ventilation Air From Out-
.
Deter-
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AIR FOR COMBUSTION
AND VENTILATION
Continued
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.
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) = 1792 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:
35,840 (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:
Space size 16 ft. (length) x 14 ft.
1792 cu. ft. (volume of space) x 20 =
30,000
10,000
40,000
Btu/Hr (maximum the space can support)
Btu/Hr (actual amount of Btu/Hr used)
35,840 Btu/Hr (maximum the space
can support)
40,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the 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.
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 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 4, page 9). You can also
remove door into adjoining room (see option 3, Figure 4, page 9). Follow the National Fuel Gas Code,
ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventila-
tion grills or ducts.
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.
.
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AIR FOR COMBUSTION
AND VENTILATION
Continued
IMPORTANT:
or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic
will activate the power vent.
Ventilation
Grills
into Adjoining
Room,
Option 1
Figure 4 - Ventilation Air from Inside
Outlet
Air
Inlet
Air
Figure 5 - Ventilation Air from Outdoors
Do not provide openings for inlet
12"
Ventilation Grills
Into Adjoining Room,
Or
Remove
Door into
Adjoining
Room,
Option 3
Option 2
12"
Building
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 bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36
inches from the front, top, or
sides of the fireplace
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
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 fireplace 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.
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INSTALLATION
Continued
IMPORTANT:
to 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, page 7.
Note:
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.
Note:
peting, tile or other combustible material, other
than wood flooring, the fireplace shall be installed
on a metal or wood panel extending the full width
and depth of the fireplace.
Use the dimensions shown for rough openings to
create the easiest installation (see Built-In Fire-
place Installation, page 11).
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.
WARNING: This appliance
is equipped for (natural or propane/LP) gas. Field conversion
is not permitted.
INSTALLATION ITEMS
Before installing fireplace, make sure you have
the items listed below.
• external regulator (supplied by installer, for
propane/LP units only)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection*
• ground joint union
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certified equipment shutoff valve from your
dealer. See Accessories, page 40.
Vent-free fireplaces add moisture
Your fireplace is designed to be used in zero
When installing fireplace directly on car-
FIREPLACE CLEARANCES
WARNING: Maintain the minimum clearances shown in Figure 6. If you can, provide greater
clearances from floor, ceiling,
and joining wall.
NOTICE: If you install the fireplace in a bedroom (Thermostat-Controlled Models only),
some building codes require that
the fireplace/mantel system be
secured to (or within) a wall.
You can position fireplace in an
optional cabinet or corner mantel. You can also recess fireplace into the wall.
If your fireplace is to be used with an optional
mantel, the installation instructions included with
your mantel shows an CSA approved method of
attaching the fireplace/mantel system to a wall.
IMPORTANT:
ner mantels specified in this manual. Purchase the
optional mantel from your dealer (see Accesso-
ries, page 40).
If your fireplace is to be recessed into the wall,
see Built-In Fireplace Installation on page 11 to
secure your fireplace into the wall.
Only use optional cabinet or cor-
CAUTION: If you install the
fireplace in a home garage
• fireplace pilot and burner must
be at least 18 inches above
floor.
• locate fireplace where moving
vehicle will not hit it.
For convenience and efficiency, install fireplace
• where there is easy access for operation, inspection, and service
• in coldest part of room
An optional blower kit is available from your
dealer. See Accessories, page 40. If planning to
use blower, follow instructions provided with
blower for power source.
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INSTALLATION
26
7
/
8
"
26
7
/
8
"
3/4" Off
The Floor
Minimum
10
1
/
2
"
36
5
/
8
"
25
7
/
8
"
51
3
/
4
"
26
7
/
8
"
Continued
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 6.
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 opening (see Figure 6).
B. Clearances from the top of the fireplace
opening to the ceiling should not be less than
36 inches.
C. For mantel clearances, see Figure 10 on
page 12.
MINIMUM CLEARANCE TO
COMBUSTIBLE MATERIALS
Top Left and Bottom
Right Sides and Rear
36" 6" 0"
Example
*
*Minimum 16 inches from Side Wall
Figure 6 - Minimum Clearance for
Combustible to Wall
Actual Framing
Height 26" 26 7/8"
Front Width 26 3/4" 26 7/8"
Depth 9 1/2" 10 1/2"
Bottom 3/4" 3/4"
1. Frame in rough opening. Use dimensions shown
in Figure 7 for the rough opening. If installing
in a corner, use dimensions shown in Figure 8
for the rough opening. The height is 26 7/8" which
is the same as the wall opening above.
2. If installing GA3450T blower accessory, do
so at this time. Follow instructions included
with blower accessory.
Note:
If not installing blower accessory, you
may wish to run electrical wiring to your fireplace for future blower installation (see Ac-
cessories, page 40). Use only approved threewire electrical wiring.
WARNING: If pre-wiring, do
not connect wiring to any electrical source at this time.
Install fireplace electrical outlet
and connect wiring to outlet before connecting to electrical
source. The fireplace electrical
outlet is included with the
GA3450T blower accessory.
Only use the fireplace electrical
outlet supplied with the
GA3450T blower accessory.
Note:
A qualified installer should make all elec-
trical connections.
BUILT-IN FIREPLACE
INSTALLATION
Built-in installation of this fireplace involves installing fireplace into a framed-in enclosure. This
makes the front of fireplace flush with wall. An
optional trim kit accessory is available (see Ac-
cessories, page 40). Trim will extend past sides of
fireplace approximately 1/2 inch. This will cover
the rough edges of the wall opening. If installing
a built-in mantel above the fireplace, you must
follow the clearances shown in Figure 10, page
11. Follow the instructions below to install the fireplace in this manner.
112462-01B 11
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Figure 7 - Rough Opening for Installing
in Wall
Figure 8 - Rough Opening for Installing
in Corner
INSTALLATION
Continued
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.
4. If you have not assembled firebox, follow instructions on page 6.
5. Carefully set fireplace in front of rough opening with back of fireplace inside wall opening.
6. Attach flexible gas line to fireplace gas regulator. See Connecting Fireplace to Gas Sup-
ply, page 19.
7. Bend four nailing flanges on outer casing with
pliers (see Figure 9).
8. Attach fireplace to wall studs using nails or
wood screws through holes in nailing flange.
9. Check all gas connections for leaks. See
Checking Gas Connections, page 19.
10. If using optional trim kit, install the trim after
final finishing and/or painting of wall. See
instructions included with trim accessory for
attaching trim.
IMPORTANT:
bustible materials such as wall board, gypsum
board, sheet rock, drywall, plywood, etc. may be
butted up next to the sides and top edge of the
firebox. Combustible materials should never overlap the firebox front facing.
When finishing your firebox, com-
Wall
Studs
WARNING: Do not allow any
combustible materials to overlap the firebox front facing.
IMPORTANT:
brick, tile, etc. may overlap the front facing, but
should never cover any necessary openings like
louvered slots.
Noncombustible materials such as
WARNING: Do not allow noncombustible materials to cover
any necessary openings like louvered slots.
WARNING: Never modify or
cover the louvered slots on the
front of the firebox.
WARNING: Use only noncombustible mortar or adhesives when overlapping the front
facing with noncombustible facing material.
Mantel Clearances for Built-In
Installation
If placing mantel above built-in fireplace, you must
meet minimum clearance between mantel shelf
and top of fireplace opening.
NOTICE: Surface temperatures
of adjacent walls and mantels
become hot during operation.
Walls and mantels above the firebox 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.
Nailing
Nails or
Flanges
Wood
Screws
Figure 9 - Attaching Fireplace to Wall
12
Studs
www.desatech.com 112462-01B
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
INSTALLATION
Continued
Mantel Shelf
Note:
All vertical
measurements
are from top of
fireplace
opening to
bottom of
mantel shelf. All
measurements
are in inches.
Figure 10 - Minimum Mantel Clearances
for Built-In Installation
OPTIONAL MANTEL INSTALLATION
Note:
Refer to instructions provided with the mantel for assembly instructions. Refer to the following instructions for system installation. Refer to
instructions on page 5 for fireplace assembly.
Blower accessory should be installed if it is being
used (see Installing Blower Accessory GA3450T,
page 14).
1. Unscrew four screws that attach top louver to
fireplace. Remove louver from fireplace and
set aside.
2. Place fireplace on wood base.
3. Place mantel around fireplace/base assembly.
4. Assemble trim kit. See Assembling Trim,
page 14.
5. Firmly snap trim kit on shoulder screws.
Shoulder screws are located on fireplace cabinet (see Figure 11).
6. Align trim kit for flush fit around opening.
7. Use two 3" wood screws provided and attach
fireplace base to wooden base. There are holes
provided on each side and floor of firebox (see
Figure 11).
8. Place base assembly next to wall at installa-
tion location.
9. Remove trim kit and mantel. Be careful not
to damage wall or mantel.
10"
8"
6"
2 1/2"
Side of Firebox
13"
16"
19"
21"
10. Attach wood base to floor with two 1 3/4" black
screws provided (see Figure 12). If the floor
is concrete use anchor method (see Attaching
Wood Base to Solid Floor, page 17).
11. Install gas line. See Connecting To Gas Sup-
ply, page 17.
12. Check for leaks. See Checking Gas Connec-
tions, page 19.
13. Place mantel around fireplace. Be careful not
to damage wall or mantel.
14. Place trim kit on the shoulder screws located
on the side and top of the fireplace. Firmly
snap the trim over the shoulder screws on fireplace (see Figure 11).
15. Adjust assembly to remove any gaps. Attach
remaining two 3" wood screws from hardware
pack through openings inside of fireplace sides
into the mantel. The openings are located at top
behind the area for the louvers (see Figure 11).
16. Reinstall top louvers.
Shoulder Screws
Hole for
Attaching
Fireplace
to Mantel
Assembled
Trim
Shoulder
Screws
Figure 11 - Attaching Trim to Fireplace
1 3/4" Screw
Wood Base
Figure 12 - Attaching Wood Base to
Floor
112462-01B 13
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INSTALLATION
Continued
Assembling Trim (Trim shipped with
mantel)
1. Remove packaging from three remaining
pieces of trim.
2. Locate two adjusting plates with set screws,
and two shims in the hardware packet.
3. Align shim under adjusting plate as shown in
Figure 13.
4. Slide one end of adjusting plate/shim in slot
on mitered edge of top trim (see Figure 13).
5. Slide other end of adjusting plate/shim in slot
on mitered edge of side trim (see Figure 13).
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 corner.
8. Set assembly aside for later installation.
Top Trim
Adjusting Plate
Set
Screws
Slot
Mitered Edge
Shim
Side Trim
Figure 13 - Assembling Trim
INSTALLING OPTIONAL BLOWER
ACCESSORY GA3450T
Removing Upper Louver
To install the blower accessory, you must first remove the upper louver.
1. Lift screen off fireplace and remove log set if
installed.
2. Remove 4 screws from upper louver (see Figure 14). Save these screws.
3. Pull upper louver straight out from the cabinet. Be careful not to scratch the paint. Set
louver and screws aside.
4. Open lower louver door by swinging door
down (see Figure 15, page 15).
Blower
Bracket
Mounting
Holes
Upper Louver
Figure 14 - Removing Upper Louver
Installing Blower Accessory
Note: If you are using a mantel with your fireplace,
use the following instructions. If your fireplace is
built-in, see For Built-In Installation, page 16.
CAUTION: Label all wires
prior to disconnection when servicing controls. Wiring errors
can cause improper and dangerous operation.
CAUTION: Verify proper operation after servicing.
1. Locate fan switch cover. Remover bottom
screw to remove back portion of the cover.
2. Install snap bushings found in hardware kit
into both holes in rear of fan switch cover.
3. Make sure the wire harness is firmly connected to the terminals on the blower bracket
assembly.
4. Note the wire locations on back of AUTO/
OFF/ON switch. The terminals on back of
switch are numbered 1, 2, and 3. Carefully
remove red wire from terminal 3 and blue wire
from terminal 1. Black wire can remain on
middle terminal 2 (see Figure 15, page 15).
5. Carefully disconnect green and white wires
at their insulated connectors (see Figure 16,
page 15).
14
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