Desa EFS26NRA Quick start guide

Save this manual for future reference.
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WARNING: If the information in this manual is not
followedexactly,afireorexplosionmayresultcausing
property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable
vaporsandliquidsinthevicinityofthisoranyother
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.
• Immediatelycallyourgassupplierfromaneighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
— Installationandservicemustbeperformedbyaquali-
fied installer, service agency, or the gas supplier.
UNVENTED (VENT-FREE) GAS
COMPACT CLASSIC HEARTH® FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
REMOTE-READY MODELS:
VMH26PRB, VMH26NRB, EFS26NRA, EFS26PRA
Shown with optional cabinet mantel/hearth base accessory.

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2
WARNING: Improper installation, adjustment, altera-
tion, service, or maintenance can cause injury or prop-
ertydamage.Refertothismanualforcorrectinstallation
and operational procedures. For assistance or addi-
tional 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
Cleaning and Maintenance ............................... 26
Wiring Diagram ................................................. 27
Troubleshooting ................................................ 28
Specifications .................................................... 32
Replacement Parts ........................................... 33
Service Hints ..................................................... 33
Technical Service .............................................. 33
Illustrated Parts Breakdown and Parts List ....... 34
Accessories....................................................... 36
Warranty Information.......................... Back Cover

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113110-01A 3
SAFETY INFORMATION
WARNING:Thisproductcon-
tains and/or generates chemi-
cals known to the State of Cali-
fornia to cause cancer or birth
defects, or other reproductive
harm.
IMPORTANT:Readthisowner’s
manualcarefullyandcompletely
beforetryingtoassemble,oper-
ate,or servicethisfireplace. Im-
proper use of this fireplace can
cause serious injury or death
fromburns,fire,explosion,elec-
trical shock, and carbon mon-
oxide poisoning.
DANGER:Carbonmonoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of car-
bonmonoxidepoisoningresembletheflu,withhead-
aches, dizziness, or nausea. If you have these signs,
thefireplace may notbeworkingproperly.Getfresh
air at once! Have fireplace serviced. Some people
are more affected by carbon monoxide than others.
These include pregnant women, people with heart
orlung disease or anemia, those under theinfluence
of alcohol, and those at high altitudes.
Naturaland Propane/LPGas: Naturalandpropane/
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
guideto safeand proper operation of this fireplace.
WARNING: Any change to
this fireplace or its controls can
be dangerous.
WARNING: Do not use a
blowerinsert,heatexchangerin-
sert, or other accessory not ap-
provedforusewiththisfireplace.
WARNING:Donotallowfans
toblowdirectlyintothefireplace.
Avoidanydraftsthatalterburner
flame patterns. Ceiling fans can
create drafts that alter burner
flame patterns. Altered burner
patterns can cause sooting.
Due to high temperatures, the
applianceshouldbelocatedout
of traffic and away from furni-
ture 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 be-
come very hot when running
heater.Keepchildrenandadults
awayfromhotsurfacestoavoid
burns or clothing ignition. Fire-
place will remain hot for a time
after shutdown. Allow surfaces
to cool before touching.
Carefully supervise young chil-
dren when they are in the room
with fireplace. When using the
hand-held remote accessory
keep selector switch in the OFF
positiontopreventchildrenfrom
turningon burnerswithremote.
You must operate this fireplace
withthefireplacescreeninplace.
Make sure fireplace screen is
closedbeforerunningfireplace.
Keep the appliance area clear
and free from combustible ma-
terials,gasoline,andotherflam-
mable vapors and liquids.

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4
1. This appliance is only for use with the type of
gas indicated on the rating plate. This appli-
ance 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.
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 bath-
room 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
andcall a qualified service person. Note: Dur-
ing initial operation, slight smoking could oc-
cur 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 sys-
tem. 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
fireplacekeeps shutting off,seeTroubleshoot-
ing, pages 28 through 31.
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.Immediatelycallaqualifiedservicetech-
nician to inspect the room fireplace and to re-
place any part of the control system and any
gas control which has been under water.
15. Turn off and unplug fireplace and let cool be-
fore servicing. Only a qualified service per-
son 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. Topreventperformanceproblems,donotusepro-
pane/LPfuel tank of less than 100 lbs. capacity.
19. Provide adequate clearances around air
openings.
SAFETY INFORMATION
Continued
PRODUCT
IDENTIFICATION
Figure 1 - Vent-Free Compact Classic
Hearth
®
Fireplace
ON
OFF
REMOTE
Screen
Fireplace
Cabinet
Logs
Ignitor
Button
Remote
Control
(Optional)
Selector
Switch
(Optional) Control
Knob

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113110-01A 5
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 lo-
cal codes. In the absence of local codes, use the
latest edition of TheNational Fuel Gas CodeANSI
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 Deple-
tion 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 re-
quires 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 re-
move at this time.
2. Remove all protective packaging applied to
fireplace for shipment.
3. Make sure your fireplace includes one hard-
ware 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
placebeforeoperatingfireplace.
This prevents excessive tem-
peraturesonfireplacesurfaces.
WARNING: Failure to posi-
tion 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
neartop of screen. Discardscrews.Liftfireplace
screenupandpullouttoremove.Setscreenaside
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 36and 37. Installoptional blower
now. Follow installation instructions provided
with blower or (see page 14).
Figure 2 - Removing Screen
Screen
Burner Support
With Log
Locator Tabs
Branch
Support
Shoulder
Screw

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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.
ASSEMBLY
Continued
Figure 3 - Assembling Hood
Hood Tab
Sheet Metal
Screws
Louver
Baffle
Firebox Top
Hood
Hood Tabs
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This fireplace
shall not be installed in a con-
fined space or unusually tight
construction unless provisions
are provided for adequate com-
bustionandventilationair.Read
the following instructions to in-
sureproperfreshairforthisand
otherfuel-burningappliancesin
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 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
classifyyour space andprovideadequateventilation.
Unusually Tight Construction
The air that leaks around doors and windows may
provide enough fresh air for combustion and ven-
tilation. However, in buildings of unusually tight
construction,you must provide additional fresh air.

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113110-01A 7
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 10-11 kg per pa-sec-m2)
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, be-
tween wall panels, at penetrations for
plumbing, electrical, and gas lines, and
at other openings.
If your home meets all of these three crite-
ria, you must provide additional fresh air.
See Ventilation Air From Outdoors , page 8 .
If your home does not meet all of the three
criteriaabove,proceedto DeterminingFresh-
Air Flow For Fireplace Location, below.
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 m3per kw) of the aggregate input rating
of all appliances installed in that space and an un-
confined space as a space whose volume is not
less than 50 cubic feet per 1,000 Btu per hour (4.8
m3per kw) of the aggregate input rating of all ap-
pliances installed in that space. Rooms communi-
cating directly with the space in which the appli-
ances are installed*, through openings not fur-
nished with doors, are considered a part of the
unconfined space.
*Adjoiningroomsare communicating only if there
are doorless passageways or ventilation grills be-
tween them.
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 in-
stall fireplace plus any adjoining rooms with
doorlesspassageways 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: Space size 16 ft. (length) x 14 ft.
(width) x 8 ft. (ceiling height) = 1792 cu. ft. (vol-
ume of space)
If additional ventilation to adjoining room is sup-
plied 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: 1792 cu. ft. (volume of space) x 20 =
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-ventdrawscombustion 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.
________ Btu/Hr(maximumthespacecansupport)
________ Btu/Hr(actual amount of Btu/Hr used)
Example: 35,840 Btu/Hr (maximum the space
can support)
40,000 Btu/Hr (actual amount of
Btu/Hr used)
30,000
10,000
40,000

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8
Thespace in the above exampleis aconfined 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 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. Vent 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 maxi-
mum 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 op-
erated is smaller than that de-
finedasanunconfinedspaceor
if the building is of unusually
tight construction, provide ad-
equate combustion and ventila-
tion air by one of the methods
described in the National Fuel
Gas Code, ANSI Z223.1/NFPA
54 Section 5.3 or applicable lo-
cal 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 perma-
nent 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).
You 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.
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 open-
ings: 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-con-
trolled power vent. Heated air entering the attic
will activate the power vent.
Figure 4 - Ventilation Air from Inside
Building
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Ventilation
Grills
into Adjoining
Room,
Option 1
Figure 5 - Ventilation Air from Outdoors
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic

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113110-01A 9
INSTALLATION
NOTICE:Thisheaterisintended
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
centralheatingsystem,youmay
run system’s circulating blower
whileusingheater.Thiswillhelp
circulatetheheatthroughoutthe
house. In the event of a power
outage, you can use this heater
as your primary heat source.
WARNING: A qualified ser-
vice person must install fire-
place. 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
objectsarelessthan36inches
from the front, top, or sides of
the fireplace
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
CAUTION:Thisfireplacecre-
ates warm air currents. These
currents move heat to wall sur-
faces next to fireplace. Install-
ingfireplacenexttovinylorcloth
wallcoveringsoroperatingfire-
placewhereimpurities(suchas,
but not limited to, tobacco
smoke,aromaticcandles,clean-
ingfluids,oilorkerosenelamps,
etc.) in the air exist, may dis-
color walls or cause odors.
IMPORTANT: Vent-free fireplaces add moisture to
theair.Althoughthisisbeneficial,installing fireplace
in rooms without enough ventilation air may cause
mildewtoformfromtoo much moisture. See Airfor
Combustion and Ventilation, pages 6 through 8.
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,ortopofyourfireplace,exceptwherestand-
offspacersareintegrally attached. If standoffspacers
are attached to your fireplace, these spacers can be
placed directly against wall or framing materials.
Note: When installing fireplace directly on car-
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).
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 pro-
pane/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
* ACSAdesign-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certifiedequipment shutoffvalve 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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10
MINIMUM CLEARANCE TO
COMBUSTIBLE MATERIALS
Top Left and Bottom
Right Sides and Rear
36" 6" 0"
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: Only use optional cabinet or cor-
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.
CAUTION: If you install the
fireplace in a home garage
• fireplacepilotandburnermust
be at least 18 inches above
floor.
• locatefireplacewheremoving
vehicle will not hit it.
For convenience and efficiency, install fireplace
• wherethere iseasy accessfor operation, inspec-
tion, and service
• in coldest part of room
An optional blower kit is available from your
dealer. See Accessories, pages 36 and 37. If plan-
ning to use blower, follow instructions provided
with blower for power source.
INSTALLATION
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 pro-
trudes 3 1/2" from the wall. This combustible
material must be 4" from the side of the fire-
place 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.
Figure 6 - Minimum Clearance for
Combustible to Wall
*Minimum 16 inches from Side Wall
Example
*
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. Frameinroughopening.Use dimensionsshown
in Figure 7, page 11 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.
BUILT-IN FIREPLACE
INSTALLATION
Built-in installation of this fireplace involves in-
stalling 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
sidesof fireplaceapproximately 1/2inch. This will
cover the rough edges of the wall opening. If in-
stalling 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.

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113110-01A 11
26
7/8
"
26
7/8
"
3/4" Off
The Floor
Minimum
10
1/2
"
Figure 7 - Rough Opening for Installing
in Wall
36
5
/ 8 "25
7
/ 8 "
51
3
/ 4 "
26
7
/ 8 "
Figure 8 - Rough Opening for Installing
in Corner
INSTALLATION
Continued
4. If you have not assembled firebox, follow in-
structions beginning on page 5.
5. Carefully set fireplace in front of rough open-
ing with back of fireplace inside wall opening.
6. Attach flexible gas line to fireplace gas regu-
lator. 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, com-
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 over-
lap the firebox front facing.
WARNING:Do notallow any
combustible materials to over-
lap the firebox front facing.
IMPORTANT: Noncombustible materials such as
brick, tile, etc. may overlap the front facing, but
should never cover any necessary openings like
louvered slots.
Nails or
Wood
Screws
Nailing
Flanges
Figure 9 - Attaching Fireplace to Wall
Studs
Wall Studs
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 fire-
place for future blower installation (see Ac-
cessories, pages 36 and 37). Use only ap-
proved three-wire electrical wiring.
Note: A qualified installer should make all
electrical connections.
WARNING: If pre-wiring, do
not connect wiring to any elec-
trical source at this time.
Install fireplace electrical outlet
and connect wiring to outlet be-
fore 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 allowedby localcodes) after the equip-
ment shutoff valve.The flexible gas line must
be the last item installed on the gas piping.

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12
Mantel Shelf
Side of
Firebox
13" 16"
19"
21"
2
1
/2"
6"
8"
10"
Note:
All vertical
measurements
are from top of
fireplace
opening to
bottom of
mantel shelf. All
measurements
are in inches.
INSTALLATION
Continued
WARNING:Donotallownon-
combustible materials to cover
any necessary openings like
louvered slots.
WARNING: Never modify or
cover the louvered slots on the
front of the firebox.
WARNING:Useonlynoncom-
bustiblemortaroradhesiveswhen
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.
Wallsandmantelsabovethefire-
boxmaybecomehottothetouch.
If installed properly, these tem-
peratures meet the requirement
ofthenationalproductstandard.
Follow all minimum clearances
shown in this manual.
Figure 10 - Minimum Mantel Clearances
for Built-In Installation
OPTIONAL MANTEL INSTALLATION
Note: Referto instructions provided with the man-
tel for assembly instructions. Refer to the follow-
ing 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 fire-
place cabinet (see Figure 12, page 13).
7. Align perimeter trim kit for flush fit around
opening.
8. Center mantel left to right on basemaking 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.
Figure 11 - Removing Top Louver
Upper
Louver
Assembly
NOTICE:Ifyourinstallationdoes
not meet the minimum clear-
ances shown, you must do one
of the following:
• raise the mantel to an accept-
able height
• remove the mantel

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113110-01A 13
INSTALLATION
Continued
Figure 12 - Attaching Perimeter Trim,
Mantel and Base
11. Cut an access hole in base to run flexible gas
line to fireplace (see Figure 12). Make sure to
locateaccess holeso mantelwill coverit when
installed. Note: You can secure base to floor
using wood screws. Countersink screw heads
and putty over.
12. Install gas line. See Connecting To Gas Sup-
ply, pages 16 and 17.
13. Check for leaks. See Checking Gas Connec-
tions, pages 17 and 18.
14. Place mantel around fireplace. Be careful not
to damage wall or mantel.
15. Place perimeter trim kiton the shoulderscrews
located on the side and top of the fireplace.
Firmlysnap trim over shoulder screws on fire-
place (see Figure 12).
16. 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 top louver (see Figure 12).
17. Reinstall top louver.
AssemblingTrim(Trimshippedwithmantel)
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.
Shoulder
Screws
Hole for 3"
Wood
Screw for
Attaching
Fireplace to
Wooden
Base
Hole for
3" Wood
Screw for
Attaching
Fireplace
to Mantel
Assembled
Trim Mantel
Base
Gas Line
Access
Hole
Figure 13 - Assembling Trim
Side Trim
Top
Trim
Mitered
Edge
Shim
Set Screws
Adjusting
Plate
INSTALLING OPTIONAL BLOWER
ACCESSORY GA3450T
Removing Upper Louver Assembly and
Branch Support
To install the blower accessory, you must first re-
move the upper louver assembly.
1. Lift screen off fireplace and remove log set if
installed.
2. Remove 2screws from each sideof branch sup-
portandpull branch support out (see Figure 14).
3. Remove 4 screws from upper louver assembly
(see Figure 14). Save these screws.
4. Pull upper louver assembly straight out from
the cabinet. Be careful not to scratch the paint.
Set louver assembly and screws aside.
5. Open lower louver door by swinging door
down (see Figure 12).
Slot
Blower Bracket
Mounting Holes
Branch
Support
Figure 14 - Removing Top Louver and
Branch Support

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14
INSTALLATION
Continued
Installing Blower Accessory
CAUTION: Label all wires
prior to disconnection when
servicingcontrols.Wiringerrors
can cause improper and dan-
gerous operation.
CAUTION: Verify proper op-
eration after servicing.
Note: Ifyou are usinga mantel with your fireplace,
use the following instructions. If your fireplace is
built-in, see For Built-In Installation, page 15.
1. Install snap bushings found in hardware kit
into both holes in rear of valve cover shield.
2. Make sure the wire harness is firmly connected
to the terminals on the blower bracket assembly.
3. Note the wire locations on back of AUTO/
OFF/ON switch. The terminals on back of
switch are numbered 1, 2, and 3. Carefully
removered wire from terminal 3 and blue wire
from terminal 1. Black wire can remain on
middle terminal 2 (see Figure 15).
Figure 15 - Installing Blower Bracket Assembly
3
2
1
Wire
Harness
Blower Bracket
Assembly
Screw
Wire Harness
Switch
Baffle
Wiring Routing
Hole in Baffle
Switch
Plate Blue Red
Valve Cover Shield
Snap
Bushing
Black
Blower
Mounting
Holes
Lower Louver Door
4. Carefully disconnect green and white wires
at their insulated connectors (see Figure 16).
5. In top of the fireplace cabinet, locate the four
mounting holes on the outer casing. Align
these four holes with those on the blower
bracket assembly. Attach blower bracket as-
sembly to the outer casing with 4 #10 screws
provided (see Figure 15).
6. Route the wire harness through the hole in left
side of baffle. Pull wire harness through lower
opening on the side of the valve cover shield.
(see Figure 15).
7. Insert the 4 wire harnesses into one of the
round holes in the rear of the valve cover
shield and through the rectangular hole in the
front of shield (see Figure 15).
Power Cord
Figure 16 - Wiring Diagram For Blower
Accessory Standard Installation
Red
Red
Fan Switch
(Auto/Off/On)
Blue
Blue
Thermostat
Switch
(N.O.)
Green
White Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
1
23
Auto

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113110-01A 15
INSTALLATION
Continued
Figure 17 - Installing Switch Plate to
Valve Cover Shield
Valve Cover
Shield
Switch
Plate
Screw
For Built-In Installation
WARNING: A licensed elec-
trician must connect the wiring
harness to electrical supply fol-
lowing all local codes. Electri-
cian must provide a clamp on
the box cover to secure the wir-
ing. Wiring should be routed
through the bushing in the hole
on the outer casing of fireplace.
1. Install a snap bushing found in hardware kit
into one of the holes on rear of valve cover
shield. The other hole is for a strain relief
clamp (not supplied) to secure incoming elec-
trical supply.
2. Follow steps 2 through 6 in Installing Blower
Accessory, page 14.
3. A licensed electrician must follow the wiring
diagram to connect incoming electrical sup-
ply to fan kit wiring harness (see Figure 18).
4. Plug power cord to the outlet receptacle (not
provided) as shown in Figure 19. Wind the
extrapower cord and tie with plastic wire strap
(see Figure 19). Set the power cord bundle
between the burner bracket and outer casing,
away from the burner.
5. Test to make sure the blower is working
properly.
6. Reinstall upper louver assembly(seeFigure14,
page 13) and close lower louver.
Red
Red
Fan Switch
(Auto/Off/On)
Blue
Blue
Thermostat
Switch
(N.O.)
Green
White Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
1
23
Auto
Figure 19 - Installing Blower Bracket
Assembly
Figure 18 - Wiring Diagram For Blower
Accessory Built-In Installation
Plastic Wire Strap
Wire Harness
Lower
Louver Door
Blower
Bracket
Assembly
Screw
Wire
Harness
Switch
Plate
Switch
Blue
Red
Outlet
Receptacle
(not included)
Power Cord
Black
Clamp
Connector
(not
included)
8. Reconnect red wire to switch position 3. Re-
connect blue wire to switch position 1. Re-
connect green and white wires.
9. Install the switch plateonthevalvecovershield
with 2 #10 screws provided (see Figure 17).
Route power cord out of the cabinet by insert-
ing it through the bushing on the outer casing
(see Figure 15, page 14). Plug fan kit into 120-
Volt groundedpowersupply and test operation.
Note: When switch is in the AUTO position,
the fan will start after the fireplace has run for
a few moments. The fan will continue to run
forseveralmomentsafterthefireplacehas been
turned off. When switch is in the ON position,
the fan will run until turned to OFF. Reinstall
upperlouverassembly (see Figure 14,page 13)
and branch support. Close lower louver door.
Extension Cord
Use extension cord if needed. The cord must have a
three-prong,groundingplugand a three-hole recep-
tacle. Make sure cord is in good shape. It must be
heavyenoughtocarrythecurrentneeded.Anunder-
sized cord will cause a drop in line voltage. This
will result in loss of power and overheating. Use a
No. 16AWG cord for lengths less than 50 feet.

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16
INSTALLATION
Continued
Propane/LP
Supply Tank
CONNECTING TO GAS SUPPLY
WARNING:Thisappliancere-
quiresa45°maleflarefitting5/8"-
18 UNF (Unified National Fine
Thread) inlet connection and the
flexible gas line provided.
WARNING: A qualified ser-
vice person must connect fire-
place to gas supply. Follow all
local codes.
WARNING: Never connect
natural gas fireplace to private
(non-utility)gas wells.This gas
is commonly known as well-
head gas.
IMPORTANT: Fornatural gas, check gasline pres-
sure before connecting fireplace to gas line. Gas
line pressure must be no greater than 14 inches of
water. If gas line pressure is higher, heater regula-
tor damage could occur.
CAUTION:Neverconnectpro-
pane/LP fireplace directly to the
propane/LPsupply.Thisfireplace
requiresanexternalregulator(not
supplied). Install the external
regulator between the fireplace
and propane/LP supply.
For propane/LP units, the installer must supply an
external regulator. The external regulator will re-
duce incoming gas pressure. You must reduce in-
coming gas pressure to between 11 and 14 inches
of water. If you do not reduce incoming gas pres-
sure, fireplace regulator damage could occur. In-
stallexternal regulator with the ventpointing down
as shown in Figure 20. Pointing the vent down
protects it from freezing rain or sleet.
Figure 20 - External Regulator With Vent
Pointing Down
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes.Usepipeof1/2"
or greater diameter to allow
propergasvolumetofireplace.If
pipe is too small, undue loss of
volume will occur.
Installation must include an equipment shutoff
valve, union, and plugged 1/8" NPT tap. Locate
NPT tap within reach for test gauge hook up. NPT
tap must be upstream from heater (see Figure 21,
page 17).
IMPORTANT: Install equipment shutoff valve in
an accessible location. The equipment shutoff
valve is for turning on or shutting off the gas to
the appliance.
Check your building codes for any special re-
quirements for locating equipment shutoff valve
to fireplaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from go-
ing into pipe. Excess sealant in pipe could result
in clogged fireplace valves.
WARNING: Use pipe joint
sealantthatisresistanttoliquid
petroleum (LP) gas.
External Regulator
Vent Pointing Down

www.desatech.com
113110-01A 17
INSTALLATION
Continued
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See Ac-
cessories, pages 36 and 37.
Figure 21 - Gas Connection
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
3" Minimum
Approved
Flexible
Gas Line
Pipe Nipple Cap Tee Joint
Propane/LP
From External
Regulator (11"
W.C.** to 14"
W.C. Pressure)
NATURAL
From Gas
Meter (5"
W.C.** to 10.5"
W.C. Pressure)
Sediment Trap
CONNECTING FIREPLACE TO GAS
SUPPLY
Installation Items Needed
• Phillips screwdriver
• sealant(resistanttopropane/LPgas,not provided)
1. Remove screws that attach branch support to
fireplace (see Figure 22). Carefully lift up
branchsupport and remove from fireplace(see
Figure 22).
NOTICE:Mostbuildingcodesdo
not permit concealed gas con-
nections. A flexible gas line is
provided to allow accessibility
fromthefireplace(seeFigure22).
The flexible gas supply line con-
nectiontothe equipmentshutoff
valve should be accessible.
2. Route flexible gas line,included,fromfireplace
controltoequipmentshutoffvalvethroughside
or rear access holes in outer casing.
3. Apply pipe joint sealant lightly to male
threads of gas connector attached to flexible
gas line/equipment shutoff valve (see Fig-
ure 23, page 18).
CAUTION: Avoid damage to
gas control. Hold gas control
withwrench whenconnectingit
to gas piping and/or fittings.
Figure 22 - Removing Branch Support
From Fireplace
Flexible
Gas Line Branch Support
We recommend that you install a sediment trap in
supply line as shown in Figure 21. Locate sedi-
ment trap where it is within reach for cleaning.
Install in piping system between fuel supply and
heater. Locate sediment trap where trapped mat-
ter is not likely to freeze. A sediment trap traps
moisture and contaminants. This keeps them from
going into fireplace controls. If sediment trap is
not installed or is installed wrong, fireplace may
not run properly.

www.desatech.com 113110-01A
18
➞
➞
4. Check all gas connections for leaks. See
Checking Gas Connections.
5. Replace branch support back into fireplace.
Feed flexible gas line into fireplace base area
whilereplacing branch support. Make sure the
entireflexible gasline isin fireplacebase area.
Reattach branch support to fireplace with
screws removed in step 1, page 17.
INSTALLATION
Continued
Figure 23 - Attaching Flexible Gas Line
to Equipment Shutoff Valve
Flexible Gas Line
from Fireplace Gas
Regulator Provided
With Fireplace
To Control
Valve Equipment
Shutoff Valve
PROPANE/LP
To External
Regulator
NATURAL
To Gas Supply
CHECKING GAS CONNECTIONS
WARNING: Test all gas pip-
ing and connections, internal
and external to unit, for leaks
afterinstallingorservicing.Cor-
rect all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak de-
tectionfluidtoalljoints.Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure exter-
nal regulator has been installed
betweenpropane/LPsupplyand
fireplace. See guidelines under
Connecting to Gas Supply ,
pages 16 and 17.
Pressure Testing gas Supply Piping
System
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment
shutoff valve from gas supply piping system.
Pressures in excess of 1/2 psig will damage
heater regulator.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
3. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas or opening main gas valve lo-
cated on or near gas meter for natural gas, or
using compressed air.
4. Check all joints of gas supply piping system.
Apply noncorrosive leak detection fluid to all
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect fireplace and equipment shutoff
valve to gas supply. Check reconnected fit-
tings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG
(3.5 kPa)
1. Close equipment shutoffvalve (see Figure24).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas or opening main gas valve lo-
cated on or near gas meter for natural gas, or
using compressed air.
3. Check all joints from gas meter to equipment
shutoff valve for natural gas or propane/LP
supplyto equipment shutoffvalvefor propane/
LP(see Figures 25 or 26, page 19).Apply non-
corrosive leak detection fluid to all joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Figure 24 - Equipment Shutoff Valve
ON
POSITION
OFF
POSITION
Open
Closed
Equipment
Shutoff Valve

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113110-01A 19
Pressure Testing Fireplace Gas
Connections
1. Open equipment shutoff valve (see Figure 24,
page 18).
2. Open main gas valve located on or near gas
meter for natural gas or open propane/LP sup-
ply tank valve.
3. Make sure control knob of fireplace is in the
OFF position.
4. Check all joints from equipment shutoff valve
to gas control valve (see Figures 25 or 26).
Apply noncorrosive leak detection fluid to all
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light fireplace (see Operating Fireplace,
pages 22 through 25). Check all other inter-
nal joints for leaks.
7. Turn off fireplace (see To Turn Off Gas to
Appliance, page 23).
INSTALLATION
Continued
Figure 25 - Checking Gas Joints
(Propane/LP Only)
Propane/LP
Supply Tank
Equipment Shutoff Valve
Equipment
Shutoff Valve
Gas
Meter
Figure 26 - Checking Gas Joints
(Natural Gas Only)
Gas Control Valve
Gas Control
Valve
OPTIONAL WIRELESS HAND-HELD
REMOTE CONTROL ACCESSORIES
(GHRCB Series & GHRCTB Series)
Installing Receiver
1. Remove screws.
2. Disconnect switch wires from the control valve.
3. Remove switch plate (see Figure 27). Discard
switch plate after removing. Save the screws.
4. Locate the battery clip mounted on the back
of the receiver (see Figure 28).
5. Slide 9-volt battery (not included) through
the clip.
6. Attach the terminal wires to the battery (see
Figure 28).
7. Connect wires as shown in Figure 30, page 20.
8. Install remote receiver unit onto fireplacebase
using the two screws removed in step one (see
Figure 29, page 20).
Figure 27 - Switch Plate and Wiring
Harness
Figure 28 - Attaching Battery to Receiver
Receiver
Screw Switch
Plate
Black
Wire
Red Wire
Battery Clip
9-Volt Battery
Terminal
Wires

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20
Figure 29 - Installing Remote Receiver
* Wire harness provided in the fireplace hard-
ware pack.
Wires from
Valve
Wire Harness*
Black
Wire
Red
Wire
Red Wire
Black Wire
Remote Receiver
INSTALLATION
Continued
Installing 9-Volt Battery in Hand-Held
Remote Control Unit
1. Remove battery cover on back of remote con-
trol unit.
2. Attach terminal wires to the battery (not in-
cluded). Place battery into the battery housing.
3. Replace battery coveronto remote control unit.
Figure 30 - Installing Battery in Hand-Held
Remote Control Unit (GHRCB Series)
Battery Cover
9-Volt
Battery
Terminal
Wires
Remote
Control
Unit
Battery
Housing
Figure 321- Installing Battery in Hand-Held
Remote Control Unit (GHRCTB Series)
Remote
Control
Unit
Battery Cover
Battery
Housing
9-Volt
Battery
Terminal
Wires
OPTIONAL WALL MOUNTED
THERMOSTAT - GWMT1
WARNING: Read and follow
installation instructions. Instal-
lationshouldbedonebyaquali-
fied installer familiar with low-
voltage wiring procedures.
WARNING: Do not connect
this thermostat to any electrical
source! Electrical shock and/or
fire hazard will occur.
1. Connect one terminal of 25 ft. wire to bottom
contact of switch (see Figure 32).
2. Connect remaining wire terminal to the “TH”
terminal on the control valve. Make sure that
wireterminals are in the positions on your unit
as pictured in Figure 32. If wires are not
“crossed” the thermostat will not work.
3. Route the 25 ft. wire to a convenient location
to mount your thermostat (no outside wall).
IMPORTANT: Thewire may be shortened but
must not be lengthened.
The thermostat should be mounted 54" above
the floor in a location where there is good air
circulation.Avoid heat sources such as lamps,
direct sunlight, fireplace, or heat and air con-
ditioning ducts.
4. Gently remove the cover of the thermostat
from the base. Grasp the sides of the cover
firmly and pull to separate from the base.
5. Feed the electrical wires through the rectan-
gular slots on each side of the base (see Fig-
ure 33, page 22).
WARNING: Do not connect
the thermostat to a power
source. Electrical shock and/or
a fire hazard will occur.
Figure 32 - Connecting Wire Terminals
AUTO
OFF
ON
One terminal
of 25 ft. wire
Switch on Gas
Fireplace
To Wall Thermostat
or Switch
Control
Valve