Desa EFS26NRA, VMH26NRB, VMH26PRB, EFS26PRA User Manual
UNVENTED (VENT-FREE) GAS
COMPACT CLASSIC HEARTH
OWNER’S OPERATION AND INSTALLATION MANUAL
Shown with optional cabinet mantel/hearth base accessory.
REMOTE-READY MODELS:
VMH26PRB, VMH26NRB, EFS26NRA, EFS26PRA
®
FIREPLACE
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
TABLE OF CONTENTS
Safety Information ............................................... 3
Product Identification .......................................... 4
Optional Remote Control Accessories ................5
Local Codes ........................................................ 5
Product Features ................................................ 5
Unpacking ........................................................... 5
Assembly ............................................................ 5
Air For Combustion and Ventilation ....................6
Installation ........................................................... 9
Operating Fireplace .......................................... 22
Inspecting Burners ............................................ 25
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Cleaning and Maintenance ...............................26
Wiring Diagram .................................................27
Troubleshooting ................................................28
Specifications .................................................... 32
Replacement Parts ........................................... 33
Service Hints ..................................................... 33
T echnical Service.............................................. 33
Illustrated Parts Breakdown and Parts List ....... 34
Accessories.......................................................36
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.
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.
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 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 fr esh
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.
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
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
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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3
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 or bedroom.
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 26.
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 Com-
bustion and Ventilation, pages 6 through 8. If
fireplace keeps shutting off, see Troubleshoot-
ing, pages 28 through 31.
Note:
Dur-
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.
13. Never place any objects in the fireplace or
on logs.
14. 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.
15. Turn off and unplug fireplace 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. Do not operate fireplace if any log is broken.
Do not operate fireplace if a log is chipped
(dime-sized or larger).
18. To prevent performance problems, do not use propane/LP fuel tank of less than 100 lbs. capacity .
19. Provide adequate clearances around air
openings.
PRODUCT
IDENTIFICATION
Fireplace
Cabinet
N
O
F
E
F
T
O
O
M
E
R
Selector
Switch
(Optional)
Ignitor
Button
Control
Knob
Figure 1 - Vent-Free Compact Classic
Hearth® Fireplace
Screen
Logs
Remote
Control
(Optional)
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OPTIONAL REMOTE
CONTROL ACCESSORIES
There are four optional remote controls that can
be purchased separately:
• wall switch
• hand-held ON/OFF remote
• wall thermostat
• hand-held thermostat remote
See Accessories, pages 36 and 37.
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
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.
PIEZO IGNITION SYSTEM
This fireplace has a piezo ignitor. This system requires no matches, batteries, or other sources to
light fireplace.
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.
ASSEMBLY
WARNING: Always have
branch support and 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. 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, pages 36 and 37. Install optional blower
now. Follow installation instructions provided
with blower or (see page 14).
Shoulder
Screw
Burner Support
With Log
Locator Tabs
Screen
Branch
Support
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Figure 2 - Removing Screen
5
ASSEMBLY
Continued
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
Sheet Metal
Screws
Figure 3 - Assembling Hood
Hood Tab
Firebox Top
Baffle
AIR FOR COMBUSTION
AND 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 ener gy 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/NFP A 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.
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AIR FOR COMBUSTION
AND VENTILATION
Continued
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 these three criteria, you must provide additional fresh air.
See
Ventilation Air From Outdoor s
If your home does not meet all of the three
criteria above, proceed to
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 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)
and
, page 8
Determining Fresh-
below.
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 in-
stall 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. Di-
rect-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)
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AIR FOR COMBUSTION
AND VENTILATION
Continued
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. Y ou must
provide additional fresh air. Your options are as
follows:
A. Rework worksheet, adding the space of an ad-
joining 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. V ent room directly to the outdoors. See Venti-
lation 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 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
Gas Code, ANSI Z223.1/NFPA
54 Section 5.3
cal 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).
Y ou can also remove door into adjoining room (see
option 3, Figure 4). 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.
.
National Fuel
or applicable lo-
12"
Ventilation Grills
Ventilation
Grills
into Adjoining
Room,
Option 1
Or
Remove
Door into
Adjoining
Room,
Option 3
Into Adjoining Room,
12"
Option 2
Figure 4 - Ventilation Air from Inside
Building
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 thermostat-controlled power vent. Heated air entering the attic
will activate the power vent.
Ventilated
Attic
Crawl Space
Ventilated
To Attic
To
Crawl
Space
Outlet
Air
Inlet
Air
Outlet
Air
Inlet Air
Figure 5 - Ventilation Air from Outdoors
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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 or bedroom
• 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.
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.
Note:
clearance installations. W all 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 10).
Vent-free fireplaces add moisture to
Your fireplace is designed to be used in zero
When installing fireplace directly on car-
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, pages 36 and 37.
Note:
If desired, purchase a four-sided trim kit
for built-in installations. See Accessories,
pages 36 and 37.
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9
INSTALLATION
Continued
FIREPLACE CLEARANCES
WARNING: Maintain the
minimum clearances shown in
Figure 6. If you can, provide
greater clearances from floor,
ceiling, and joining 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, pages 36 and 37).
If your fireplace is to be recessed into the wall,
see Built-In Fireplace Installation to secure your
fireplace into the wall.
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, pages 36 and 37. If planning to use blower, follow instructions provided
with blower for power source.
Only use optional cabinet or cor-
CAUTION: If you install the
Example
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"
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, pages 36 and 37). 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 12. Follow the instructions below to install
the fireplace in this manner.
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"
*Minimum 16 inches from Side Wall
Figure 6 - Minimum Clearance for
Combustible to Wall
10
1. Frame in rough opening. Use dimensions shown
in Figure 7, page 11 for the rough opening. If
installing in a corner, use dimensions shown in
*
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Figure 8 for the rough opening. The height is
26 7/8" which is the same as the wall opening
above.
INSTALLATION
Continued
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, pages 36 and 37). Use only approved three-wire electrical wiring.
Note:
A qualified installer should make all
electrical connections.
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.
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 beginning on page 5.
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, pages 17 and 18.
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 18.
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:
When finishing your firebox, combustible 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.
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
Wall Studs
1
10
/
2
"
7
/
8
"
26
3/4" Off
7
26
/
8
"
The Floor
Minimum
Figure 7 - Rough Opening for Installing
in Wall
5
36
/
8
"
7
/
8
"
26
3
/
4
"
51
7
/
8
"
25
Figure 8 - Rough Opening for Installing
in Corner
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Nails or
Wood
Screws
Nailing
Flanges
Figure 9 - Attaching Fireplace to Wall
Studs
11
INSTALLATION
Continued
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.
13"
16"
Mantel Shelf
21"
19"
Note:
All vertical
measurements
are from top of
fireplace
opening to
bottom of
mantel shelf. All
measurements
are in inches.
10"
8"
6"
2 1/2"
NOTICE: If your installation does
not meet the minimum clearances shown, you must do one
of the following:
• raise the mantel to an acceptable height
• remove the mantel
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 Optional Blower Accessory
GA3450T, pages 13 through 15).
1. Unscrew four screws that attach top louver to
fireplace. Remove louver from fireplace and
set aside (see Figure 11).
2. Place base assembly next to wall at installa-
tion location.
3. Place fireplace on wood base (see Figure 12,
page 13).
4. Place mantel around fireplace on base (see
Figure 12, page 13).
5. Assemble perimeter trim kit. See Assembling
Perimeter Trim, page 13.
6. Firmly snap perimeter trim kit on shoulder
screws. Shoulder screws are located on fireplace cabinet (see Figure 12, page 13).
7. Align perimeter trim kit for flush fit around
opening.
8. Center mantel left to right on base making sure
mantel is flush against wall.
9. Use two 3" wood screws provided and attach
base of fireplace to wooden mantel base (see
Figure 12, page 13).
10. Remove perimeter trim kit and mantel. Be
careful not to damage wall or mantel.
Side of
Firebox
Figure 10 - Minimum Mantel Clearances
12
for Built-In Installation
www.desatech.com 113110-01A
Upper
Louver
Assembly
Figure 11 - Removing Top Louver
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