Comfort Glow CF26NT Quick start guide

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OWNER’S OPERATION AND INSTALLATION MANUAL
VENT-FREE NATURAL GAS
BAY FRONT FIREPLACE
Patent Pending
Fireplace Shown
With Optional
Bay Front Mantel
CF26NT
15,000 to 26,000 Btu/Hr
withThermostat
WARNING: If the information in this manual is not
followedexactly,afireorexplosionmayresultcaus-
ing property damage, personal injury, or loss of life.
— Donotstoreorusegasolineor 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.
• Donottouchanyelectricalswitch;donotuse
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• Ifyoucannotreachyourgassupplier,call the
fire department.
— Installation and service must be performed
byaqualifiedinstaller, serviceagency,or the
gas supplier.
WARNING: Improper installa-
tion,adjustment,alteration,ser-
vice,ormaintenancecancause
injury or property damage. Re-
fer to this manual for correct
installationandoperationalpro-
cedures. For assistance or ad-
ditional information consult a
qualified installer, service
agency, or the gas supplier.
WARNING: This is an unvented
gas-fired heater. It uses air (oxy-
gen) from the room in which it is
installed.Provisionsforadequate
combustion and ventilation air
mustbeprovided.Referto Airfor
Combustionand Ventilation sec-
tion on page 4 of this manual.
AUTO
OFF
ON
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

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107188
VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
CF26NT
For more information, visit www.desatech.com
IMPORTANT: Read this Owner’s
Manual carefully and completely
beforetryingtoassemble,operate,
or service this fireplace. Improper
use of this fireplace can cause se-
rious injury or death from burns,
fire,explosion,electricalshock,and
carbon monoxide poisoning.
SAFETY
INFORMATION
CarbonMonoxidePoisoning:Earlysignsof
carbon monoxide poisoning resemble the flu,
with headaches, dizziness, or nausea. If you
have these signs, the fireplace may not be
workingproperly.Getfreshairatonce!Have
fireplace serviced. Some people are more
affectedbycarbonmonoxidethanothers.These
includepregnantwomen,peoplewithheartor
lung disease or anemia, those under the influ-
ence of alcohol, and those at high altitudes.
NaturalGas:Naturalgasisodorless.Anodor-
makingagentisaddedtonaturalgas.Theodor
helps you detect a natural gas leak. However,
theodoraddedtonaturalgascanfade.Natural
gasmaybepresenteventhoughnoodorexists.
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.
1. This appliance is only for use with the
typeof gas indicated on the ratingplate.
Thisapplianceis not convertible for use
with other gases.
2. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch;
donot use any phone in yourbuilding.
• immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions
• ifyou cannot reach your gassupplier,
call the fire department
3. This fireplace shall not be installed in
a bedroom or bathroom.
4. Do not use this fireplace as a wood-
burning fireplace. Use only the logs
provided with the fireplace.
WARNING ICON G001
WARNINGS
DANGER: Carbon monoxide
poisoning may lead to death!
5. Do not add extra logs or ornaments
suchas pine cones,vermiculite, or rock
wool. Using these added items can
cause sooting. Do not add lava rock
aroundbase. Rock and debriscould fall
into the control area of fireplace.
6. This fireplace is designed to be smoke-
less. If logs ever appear to smoke, turn
off fireplace and call a qualified ser-
vice person. Note: During initial op-
eration,slight smoking could occurdue
to log curing and fireplace burning
manufacturing residues.
7. To prevent the creation of soot, follow
the instructions in Cleaning and Main-
tenance, page 17.
8. Before using furniture polish,wax, car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
theseproducts may createa white pow-
der residue within burner box or on
adjacent walls or furniture.
9. This fireplace needs fresh air ventila-
tion 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 Combus-
tion and Ventilation, pages 4 through
6. If fireplace keeps shutting off, see
Troubleshooting, pages 18 through 20.
10. Do not run fireplace
• where flammable liquids or vapors
are used or stored.
• under dusty conditions.
11. Do not use this fireplace to cook food
or burn paper or other objects.
12. Do notuse fireplaceif anypart hasbeen
under water. Immediately call a quali-
fied service technician to inspect the
room fireplace and to replace any part
of the control system and any gas con-
trol which has been under water.
13. Turn off and unplug fireplace and let
cool before servicing. Only a qualified
service person should service and re-
pair fireplace.
14. Operating fireplace aboveelevationsof
4,500 feet could cause pilot outage.
15. Do not operate fireplace if any log is
broken. Do not operate fireplace if a
log is chipped (dime-sized or larger).
WARNING:Anychangetothis
fireplace or its controls can be
dangerous.
WARNING: Do not allow fans
toblowdirectlyintothefireplace.
Avoidanydraftsthatalterburner
flame patterns. Ceiling fans can
create drafts that alter burner
flame patterns. Altered burner
patterns can cause sooting.
WARNING: Do not use a
blower insert, heat exchanger
insert,orotheraccessorynotap-
provedforusewiththisfireplace.
Due to high temperatures, the
appliance should be located out
oftraffic and awayfrom furniture
and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects in the fireplace.
Fireplacefrontandscreenbecomes
very hot when running fireplace.
Keepchildrenandadultsawayfrom
hotsurfacestoavoidburnsorcloth-
ing ignition. Fireplace will remain
hotforatimeaftershutdown.Allow
surfaces to cool before touching.
Carefully supervise young chil-
dren when they are in the room
with fireplace.
Keeptheapplianceareaclearand
free from combustible materials,
gasoline,andotherflammableva-
pors and liquids.
You must operate this fireplace
with a fireplace screen in place.
Make sure fireplace screen is in
place before running fireplace.

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107188
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AUTO
OFF
ON
PRODUCT
IDENTIFICATION
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
CodeANS Z223.1, also known asNFPA54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Figure 1 - Vent-Free Gas Compact Fireplace
UNPACKING
1. Remove and fireplace from carton.
2. Remove all protective packaging ap-
plied to fireplace for shipment.
3. Make sure your fireplace includes one
hardware packet.
4. Checkfireplaceforanyshippingdamage.
If fireplace is damaged, promptly inform
dealer where you bought fireplace.
PRODUCT
FEATURES
SAFETY PILOT
This fireplace has a pilot with an Oxygen
DepletionSensing(ODS)safetyshutoffsys-
tem. 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 sys-
tem requires no matches, batteries, or other
sources to light fireplace.
Heater Controls
(Inside Door)
Screen
Fireplace
Cabinet
Logs
Brick
Liner

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107188
VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
CF26NT
For more information, visit www.desatech.com
AIR FOR
COMBUSTION AND
VENTILATION
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weatherstrip and caulkaroundwindows and
doorstokeepthecoldairoutandthewarmair
in. During heating months, home owners
want their homes as airtight as possible.
While it is good to make your home energy
efficient,yourhomeneedstobreathe.Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
Exhaustfans,fireplaces,clothesdryers,and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air for these appliances. This
will insure proper venting of vented fuel-
burning appliances.
WARNING: This heater shall
not be installed in a confined
space or unusually tight con-
struction unless provisions are
provided for adequate combus-
tion and ventilation air. Read the
following instructions to insure
properfreshairforthisandother
fuel-burning appliances in your
home.
Confined and Unconfined Space
The National Fuel Gas Code, ANS Z223.1
defines a confined space as a space whose
volume is less than 50 cubic feet per 1,000
Btu per hour (4.8 m3per kw) of the aggre-
gate input rating of all appliances installed
in that space and an unconfined space as a
space whose volume is not less than 50
cubicfeetper1,000Btuperhour(4.8m3per
kw) of the aggregate input rating of all
appliances installed in that space. Rooms
communicating directly with the space in
whichtheappliancesareinstalled*,through
openings not furnished with doors, are con-
sidered a part of the unconfined space.
This heater shall not be installed in a con-
fined space or unusually tight construction
unlessprovisionsareprovided for adequate
combustion and ventilation air.
*Adjoiningroomsarecommunicatingonly
iftherearedoorlesspassagewaysorventila-
tion grills between them.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National
Fuel Gas Code, NFPA 54/ANS Z223.1, Sec-
tion5.3,AirforCombustionandVentilation.
Allspacesinhomesfallintooneofthethree
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and win-
dows 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 de-
fined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6 x 10-11 kg
per pa-sec-m2) or less with open-
ings gasketed or sealed and
b. weather stripping has been
added on openable windows and
doors and
c. caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors,be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tionsfor plumbing,electrical,and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors , page 6 .
If your home does not meet all of the
threecriteriaabove, proceedto Deter-
mining Fresh-Air Flow For Fireplace
Location, page 5.

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Continued
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR FIREPLACE LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet 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: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 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. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
_________________ (volume of space) ÷50 cu. ft. = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) ÷50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free fireplace ________________ Btu/Hr
Gas water heater ________________ Btu/Hr
Gas furnace ________________ Btu/Hr
Vented gas heater ________________ Btu/Hr
Gas fireplace logs ________________ Btu/Hr
Other gas appliances* +________________ Btu/Hr
Total =________________ Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
_____________ Btu/Hr (maximum the space can support)
_____________ Btu/Hr (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space can support)
56,000 Btu/Hr (actual amount of Btu/Hr used)
ThespaceintheaboveexampleisaconfinedspacebecausetheactualBtu/HrusedismorethanthemaximumBtu/Hrthespacecansupport.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.
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:Iftheareainwhichtheheatermaybeoperatedissmallerthanthatdefinedasanunconfinedspace
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, ANS Z223.1, Section 5.3 or applicable local codes.
Example:
Gas water heater 30,000 Btu/Hr
Vent-free fireplace +26,000 Btu/Hr
Total = 56,000 Btu/Hr

6
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VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
CF26NT
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Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connecttheseitemsdirectlytotheoutdoors
orspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces. Follow the
National Fuel Gas Code, NFPA 54/ANS
Z223.1,Section5.3,AirforCombustionand
Ventilation for required size of ventilation
grills or ducts.
IMPORTANT: Do notprovideopeningsfor
inlet or outlet air into attic if attic has a
thermostat-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.
AIR FOR
COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside
Building
Thisfreshairwouldcomefromanadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(seeoptions1and2,Figure2).Youcanalso
remove door into adjoining room (see op-
tion 3, Figure 2). Follow the National Fuel
Gas Code, NFPA 54/ANS Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
WARNING: Rework work-
sheet, adding the space of the
adjoiningunconfinedspace.The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Figure 3 - Ventilation Air from Outdoors Shown with Optional Mantel
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
Figure 2 - Ventilation Air from Inside Building Shown with Optional Mantel
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Ventilation
Grills
into Adjoining
Room,
Option 1

7
107188
OWNER’S MANUAL
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INSTALLATION
WARNING: A qualified ser-
vicepersonmustinstallfireplace.
Follow all local codes. You can recess firebox into the wall. You
can also position fireplace in the optional
cabinet mantels.
IMPORTANT: Only use optional cabinet
mantels specified in this manual. Purchase
the optional mantel from your dealer (see
Accessories, page 27).
CAUTION: This fireplace cre-
ates warm air currents. These cur-
rents move heat to wall surfaces
nexttofireplace.Installingfireplace
nexttovinylorclothwallcoverings
or operating fireplace where impu-
rities(suchastobaccosmoke,aro-
matic candles, cleaning fluids, oil
or kerosene lamps, etc.) in the air
exist, may discolor walls.
IMPORTANT: Vent-freefireplacesaddmois-
ture to the air. Although this is beneficial,
installing fireplace in rooms without enough
ventilationairmaycausemildewtoformfrom
too much moisture. See Air for Combustion
and Ventilation, pages 4 through 6.
LOCATING FIREPLACE
WARNING:Maintainthemini-
mum clearances shown in Fig-
ures 4 and 5. If you can, provide
greater clearances from floor,
ceiling, and joining wall.
CHECK GAS TYPE
Use only natural gas. If your gas supply is
notnatural gas, do notinstall fireplace. Call
dealerwhereyouboughtfireplaceforproper
type fireplace.
INSTALLATION ITEMS
Before installing fireplace, make sure you
have the items listed below.
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• ground joint union
• sediment trap
• tee joint
• pipe wrench
• test gauge connection*
Note: Your Comfort Glow fireplace is de-
signed to be used in zero clearance installa-
tions.Wallorframingmaterialcanbeplaced
directly against any exterior surface on the
fireplace,exceptwherestandoffspacersare
integrally attached. If standoff spacers are
attachedtoyourfireplace,thesespacers can
be placed directly against wall or framing
materials.
Use the dimensions shown for rough openings
to create the easiest installation (see Built-In
Fireplace Installation, page 8).
CAUTION: If you install the
fireplace in a home garage
• fireplace pilot and burner must
beatleast18inchesabovefloor.
• locate fireplace where moving
vehicle will not hit it.
Forconvenienceand efficiency,installfire-
place
• 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 27. If
planningtouseblower,locatefireplacenear
an electrical outlet.
WARNING: Never install the
fireplace
• in a bedroom or a bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objectsarelessthan42inches
from the front, top, or sides of
the fireplace
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
NOTICE: This heater is intended
foruseassupplementalheat.Use
this heater along with your pri-
mary heating system. Do not in-
stall this heater as your primary
heatsource. Ifyou haveacentral
heating system, you may run
system’scirculatingblowerwhile
usingheater.Thiswillhelpcircu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
Figure5-MountingClearancesAsViewed
From Front of Fireplace Shown with
Optional Mantel
Figure4-MountingClearancesAsViewed
From Front of Fireplace Shown Built In
The Wall
6"
Minimum
From
Sides Of
Fireplace
Left
Side
CEILING
42" Minimum
FLOOR
Right
Side
Top Of
Mantel Can
Be Flush
With Wall
Left
Side
CEILING
Right
Side
42"
Minimum
Continued
* An CSA/AGA design-certified equip-
ment shutoff valve with 1/8" NPT tap is an
acceptablealternativeto test gauge connec-
tion. Purchase the optional CSA/AGA de-
sign-certifiedequipmentshutoffvalvefrom
your dealer. See Accessories, page 27.
Note: If desired, purchase a four-sided
brass trim kit for built-in installations. See
Accessories, page 27.

8
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VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
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7. Bend four nailing flanges on outer cas-
ing with pliers (see Figure 8).
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 14.
Figure 8 - Attaching Fireplace to Wall Studs
36
5
/ 8 "25
7
/ 8 "
51
3
/ 4 "
26
7
/ 8 "
Figure7-RoughOpeningforInstallingin
Corner
2. An optional blower accessory is avail-
able (see Accessories, page 27). There
are two options for connecting blower
to electrical source.
Option one: Have a licensed electri-
cian install a properly grounded, three-
prong 120-volt electrical outlet at fire-
place location. Locate outlet inside the
framed enclosure. Blower power cord
will plug into this outlet.
Option two:Have a licensed electri-
cianconnect blower to electricalsource
at junction box inside fireplace.
If using option one, have electrical out-
let installed at this time. If using option
two, do not connect blower to electrical
source at junction box until step 6.
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. Carefully set fireplace in front of rough
opening with back of fireplace inside
wall opening.
5. Attach flexible gas line to fireplace gas
regulator. See Connecting Fireplace to
Gas Supply, page 13.
6. If the optional blower has beeninstalled
connect blower to electrical source.
Option one: Route blower electrical
cord through side or rear access door
of fireplace. Plug electrical cord into
electrical outlet.
Optiontwo:Have a licensedelectrician
connect blower to electrical source at
junction box inside fireplace.
1. Frame in rough opening. Use dimen-
sions shown in Figure 6 for the rough
opening.
If installing in a corner, use dimensions
shown in Figure 7 for the rough open-
ing. The height is 26 1/8" which is the
same as the wall opening above.
26
7
/ 8 "
26
7
/ 8 "
3/4" Off
The Floor
Minimum
10
1
/ 2 "
Figure6-RoughOpeningforInstallingin
Wall
BUILT-IN FIREPLACE
INSTALLATION
Built-ininstallationofthisfireplaceinvolves
installing fireplace into a framed-in enclo-
sure. This makes the front of fireplace flush
with wall. Follow the instructions below to
installthefireplaceinthismanner.Ifinstall-
ing a built-in mantel above the fireplace,
you must follow the clearances shown in
Figure 9, page 9. If using for built-in instal-
lation off of the floor, follow clearances
shown in Figure 4, page 7.
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"
INSTALLATION
Continued
WARNING: Do not allow any
combustible materials to overlap
the firebox front facing.
IMPORTANT: When finishing your fire-
box, combustible materials such as wall
board, gypsum board, sheet rock, drywall,
plywood, etc. may be butted up next to the
sides and top of the firebox. Combustible
materials should never overlap the firebox
front facing. Firebox should not be placed
on top of carpet or other kinds of fibrous
material.
IMPORTANT: Noncombustible materials
suchasbrick,tile,etc.mayoverlapthefront
facing, but should never cover any neces-
sary openings like louvered slots.
WARNING: Do not allow non-
combustible materials to cover
any necessary openings like lou-
vered slots.
WARNING:Useonlynoncom-
bustible mortar or adhesives
when overlapping the front fac-
ing with noncombustible facing
material.
WARNING: Never modify or
cover the louvered slots on the
front of the firebox.
Nails or
Wood
Screws
AUTO
OFF
ON
Nailing
Flanges

9
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INSTALLATION
Continued
Figure 9 - Minimum Mantel Clearances
for Built-In Installation
Mantel Shelf
Note: All vertical
measurements
are from top of
fireplace
opening to
bottom of
mantel shelf.
13" 16" 19" 21"
2 1/2"
6"
8"
10"
Minimum Non-
Combustible
Material
Continued
4. Place brass trim on the shoulder screws
locatedonthesideandtopofthefireplace.
Firmlysnap the brass trimoverthe shoul-
der screws on fireplace (see Figure 14,
page 10).
5. Place mantel base close to wall in de-
sired fireplace location.
6. Install gas line. See Connecting To Gas
Supply, page 12
7. Carefully place fireplace on mantel base
andcenterlefttoright.Checkforgasleaks.
See Checking Gas Connections, page 14.
8. Refer to instructions provided with the
mantelforpermanentattachment towall.
9. Slide mantel around fireplace. Be care-
ful not to damage wall or mantel.
Figure 12 - Removing Hood Screws
Hood
Screen
Rod
Cover
Screw
Figure 13 - Removing Hood
Mantel Screw
Location
Figure 11 - Removing Screen
Removing brick liner retainer
1. Using Phillips screw driver, remove 2
screws attaching brick liner retainers to
vertical sides.
2. Removebricklinerretainers anddiscard.
Replace 2 screws into vertical sides.
Figure 10 - Assembling Brass Trim
OPTIONAL MANTEL
INSTALLATION
Note: Refer to instructions provided with
the mantel for assembly instructions. Refer
to instructions below for system installa-
tion. If using blower accessory (see Acces-
sories, page 27), see installation instruc-
tions on pages 10 and 11.
1 . Choose location for fireplace and in-
stall gas supply line.
2. Removescreenfromfireplace byremov-
ing screws in each end of screen rod (see
Figure 11). Hold screen rod cover while
removing five hex head screws under-
neathhood (see Figure12).Carefullylift
and pull out hood (see Figure 13).
3. Assemble brass trim kit. See Assem-
bling Brass Trim.
Top
Brass
Trim
Side
Brass
Trim
Mitered
Edge
Shim
Set Screws
Adjusting
Plate
Slot
Slot
NOTICE:Ifyour installationdoes
notmeettheminimumclearances
shown, you must do one of the
following:
• raise the mantel to an accept-
able height
• remove the mantel
Mantel Clearances for Built-In
Installation
If placing mantel above built-in fireplace,
youmustmeetminimumclearancebetween
mantel shelf and top of fireplace opening.
NOTICE:Surfacetemperaturesof
adjacent walls and mantels be-
comehotduringoperation.Walls
and mantels above the firebox
may become hot to the touch. If
installedproperly,thesetempera-
turesmeettherequirementofthe
national product standard. Fol-
low all minimum clearances
shown in this manual.
Assembling Brass Trim
(Brass trim shipped with mantel)
1. Remove packaging from three remain-
ing pieces of brass trim.
2. Locatetwoadjustingplateswithsetscrews,
and two shims in the hardware packet.
3. Align shim under adjusting plate as
shown in Figure 10.
4. Slide one end of adjusting plate/shim
inslot on mitered edgeof top brass trim
(see Figure 10).
5. Slide other end of adjusting plate/shim
in slot on mitered edge of side brass
trim (see Figure 10).
6. Whilefirmly holding edges of brass trim
together, tighten both set screws on the
adjusting plate with slotted screwdriver.
7. Repeat steps 1 through 6 for other corner.
8. Set brass assembly aside for later in-
stallation.

10
107188
VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
CF26NT
For more information, visit www.desatech.com
INSTALLATION
Continued
Note: If you are using a mantel with your
heater, use the following instructions. If
your heater is built-in, see For Built-In In-
stallation on page 11.
1. Screen and hood should be removed
from fireplace (see page 9). Remove
log set and set aside.
2. Install snap bushings found in hardware
kit into both holes in rear of blower
control shield (see Figure 15).
3. Make sure the wire harness is firmly
connectedto the terminals on the blower
bracket assembly.
4. Note the wire locations on back of
AUTO/OFF/ON switch. Carefully re-
move red wire from the AUTO termi-
nal and blue wire from the ON termi-
nal. Black wire can remain on middle
or OFF terminal (see Figure 16).
5. Carefully disconnect green and white
wires from power cord harness at their
insulated connectors.
6. In top of the heater cabinet, locate the
four mounting holes on the outer cas-
ing. Align these four holes with those
on the blower bracket assembly.Attach
blower bracket assembly to the outer
casing with 4 - #10 screws provided
(see Figure 16).
7. Route the wire harnessthrough thehole
to the left side of heat deflector. Pull
wire harness through lower opening to
theleftoftheblowercontrolshield. (see
Figure 16).
Snap
Bushing
Figure 15 - Installing Snap Bushings
Blower
Control
Shield
Figure 16 - Installing Blower Bracket Assembly
8. Insert the 4 wire harness into one of the
round holes in the rear of the blower
control shield and through the rectan-
gular hole in the front of shield (see
Figure 16).
9. Reconnect red wireto theAUTO switch
position. Reconnect bluewire to the ON
switch position. Reconnect green and
white wires to the power cord.
10. Install the switch plate on the blower
control shield with 2 - #10 screws pro-
vided (see Figure 17, page 11). Route
power cord out of the cabinet by insert-
ing it through the bushing on the outer
casing (see Figure 16). Plug fan kit into
120-Volt grounded power supply and
test operation. Note: When switch is in
the AUTO position, the fan will start
after the heater has run for a few mo-
ments. The fan will continue to run for
several moments after the heater has
been turned off. When switch is in the
ONposition, the fanwillrununtil turned
to OFF. Reinstall hood assembly and
close lower louver door.
11. Place log set back on the unit.
AUTO
OFF
ON
Wire Harness
Blower Bracket
Assembly
Screw
Power
Cord
Blower
Control
Shield Shield Cover
Wire
Harness
Switch Plate
Switch
Heat
Deflector
Wiring Routing Hole
Blue Red
Figure14-AttachingBrassTrimtoFireplace
AUTO
OFF
ON
Shoulder
Screws
Assembled
Brass Trim
10. Adjust assembly to remove any gaps.
From back side of fireplace, attach two
2" wood screws through base mount-
ing blocks attached to bottom sides of
mantel into base (see instructions pro-
vided with mantel).
11. Attach remaining two 3" wood screws
from hardware pack through openings
inside of fireplace sides into the mantel.
See Figure 13 for screw hole location.
CAUTION: Label all wires
priortodisconnectionwhenser-
vicing controls. Wiring errors
cancauseimproperanddanger-
ous operation.
CAUTION: Verify proper op-
eration after servicing.
INSTALLING BLOWER
ASSEMBLY - GA3450T

11
107188
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Blower
Control
Shield
INSTALLATION
Continued
Figure 17 - Installing Switch Plate to
Blower Control Shield
Switch
Plate
Screw
WARNING: A licensed electri-
cian must connect the wiring har-
ness to electrical supply following
all local codes. Electrician must
provideaclampontheboxcoverto
securethewiring.Wiringshouldbe
routed through the bushing in the
hole on the outer casing of heater.
For Built-In Installation
Figure 18 - Installing Blower Bracket Assembly
Figure 19 - Wiring Diagram For Fan Accessory Built-In Installation
AUTO
OFF
ON
Blower Bracket
Assembly
Screw
Wire
Harness
Power
Cord
Blower
Control
Shield
Wire
Harness
Switch
Plate
Switch
Clamp Connector
(not included)
Outlet
Receptacle
Blue
Continued
Red
Shield
Cover
Strain
Relief
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
1. Install a snap bushing found in hard-
warekit into one oftheholes found rear
ofblower control shield.The other hole
isfora strain relief clamp (not supplied)
to secure incoming electrical supply.
2. Follow steps 2 through 6 in Installing
Blower Assembly, page 10. Also re-
move black wire from middle/OFF
switch terminal.
3. Remove black plastic strain relief and
power cord from switch plate (see Fig-
ure 18). The power cord supplied will
notbe used in built-ininstallations.Pop
in the plastic snap bushing found in
hardware kit into the hole left by sup-
ply cord/strain relief.
4. A licensed electrician must follow the
wiring diagram in Figure 19 to connect
incoming electrical supply to fan kit
wiring harness.
5. Test to make sure the blower is work-
ing properly.
6. Reinstall hood assembly (see page 9)
and close lower louver door.
7. Place log set back on the unit.

12
107188
VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
CF26NT
For more information, visit www.desatech.com
CONNECTING TO GAS
SUPPLY
WARNING: A qualified ser-
vice person must connect fire-
place to gas supply. Follow all
local codes.
IMPORTANT: Check gas line pressure
before connecting fireplace to gas line. Gas
line pressure must be no greater than 14
inchesofwater.Ifgaslinepressureishigher,
fireplace regulator damage could occur.
Installationmustincludeaequipmentshutoff
valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
fireplace (see Figure 20).
IMPORTANT: Install equipment shutoff
valve in an accessible location. The equip-
ment shutoff valve is for turning on or
shutting off the gas to the appliance.
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
fromgoinginto pipe. Excess sealant in pipe
could result in clogged fireplace valves.
We recommend that you install a sediment
trap in supply line as shown in Figure 20.
Locate sediment trap where it is within
reach for cleaning. Install in piping system
betweenfuelsupplyandheater.Locatesedi-
menttrap where trapped matteris 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.
WARNING: Never connect
fireplace to private (non-utility)
gas wells. This gas is commonly
known as wellhead gas.
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
propergasvolume tofireplace.If
pipe is too small, undue loss of
pressure will occur.
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
* Purchase the optional CSA/AGA design-certified equipment shutoff valve from your
dealer. See Accessories, page 27.
** Minimum inlet pressure for purpose of input adjustment.
Figure 20 - Gas Connection
INSTALLATION
Continued
WARNING: This appliance
requiresa1/2"NPT(NationalPipe
Thread) inlet connection to the
pressure regulator.
O
F
F
P
I
L
O
T
O
N
H
I
L
O
Cap Pipe Tee
Nipple Joint
3" Minimum
Sediment Trap
Gas
Control
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
CSA/AGA Design-Certified Equipment
Shutoff Valve With 1/8" NPT Tap*
Approved Flexible
Gas Hose

13
107188
OWNER’S MANUAL
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CONNECTING FIREPLACE
TO GAS SUPPLY
Installation Items Needed
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not
provided)
1. Route flexible gas line (provided by
installer)from equipment shutoffvalve
into fireplace through side or rear ac-
cess holes in outer casing.
2. Apply pipe joint sealant lightly to male
threads of gas connector attached to
flexible gas line (see Figure 22). Con-
nectflexible gas line toflexible gas line
attached to gas valve of fireplace (see
Figure 22).
3. Check all gas connections for leaks. See
Checking Gas Connections, page 14.
4. Feedflexiblegaslineintofireplacebase
area. Make sure the entire flexible gas
line is in fireplace mantel base area.
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-
nection to the equipment shutoff
valve should be accessible.
Figure 22 - Attaching Flexible Gas Lines Together
INSTALLATION
Continued
Flexible Gas Line from
Fireplace Gas Valve
Provided with Fireplace
To Fireplace
Gas Valve
➞
Gas Connector
Flexible Gas Line from
Equipment Shutoff Valve
Provided by Installer
Equipment Shutoff
Valve
➞
To Gas
Supply
Figure 21 - Routing Flexible Gas Line
CAUTION: Avoid damage to
regulator.Holdgasregulatorwith
wrenchwhenconnectingittogas
piping and/or fittings.
AUTO
OFF
ON
Equipment
Shutoff Valve
Outer
Casing
Continued

14
107188
VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
CF26NT
For more information, visit www.desatech.com
O
POSI
P
O
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
maingasvalve(controlvalve)andequip-
ment shutoff valve from gas supply pip-
ing system. Pressures in excess of 1/2
psig will damage fireplace regulator.
2. Cap off open end of gas pipe where
equipmentshutoffvalvewasconnected.
3. Pressurizesupplypipingsystembyeither
usingcompressedairoropeningmaingas
valve located on or near gas meter.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
Open
Closed
Equipment
Shutoff
Valve
CHECKING GAS
CONNECTIONS
Figure 23 - Equipment Shutoff Valve
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
toalljoints.Bubblesformingshow
a leak. Correct all leaks at once.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see
Figure 23).
2. Pressurizesupplypipingsystembyeither
usingcompressedairoropeningmaingas
valve located on or near gas meter.
3. Check all joints from gas meter to
equipment shutoff valve (see Figure
24).Apply mixture of liquid soap and
water to gas joints. Bubbles forming
show a leak.
4. Correct all leaks at once.
INSTALLATION
Continued
Gas Meter
Figure 24 - Checking Gas Joints (Shown With Optional Mantel)
Manual
Shutoff
Valve
Pressure Testing Fireplace Gas
Connections
1. Open equipment shutoffvalve(see Fig-
ure 23).
2. Open main gas valve located on or near
gas meter.
3. Make sure control knob of fireplace is
in the OFF position.
4. Check all joints from equipment shutoff
valve to thermostat gas valve (see Fig-
ure 24). Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Light fireplace (see Operating Fire-
place,pages15and 16). Check all other
internal joints for leaks.
7. Turn off fireplace (see To Turn Off Gas
to Appliance, page 16).
8. Replace front panel.

15
107188
OWNER’S MANUAL
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LO
PILOT
OFF
HI
WARNING:Failuretoposition
thepartsinaccordancewiththese
diagrams or failure to use only
parts specifically approved with
this heater may result in property
damage or personal injury.
INSTALLING LOGS
Itisveryimportanttoinstallthelogsexactly
as instructed. Do not modify logs. Only use
logs supplied with heater.
Place one-piece log set on grate to fit as
illustrated in Figure 25. Make sure back
section of log set is seated into “U”-shaped
cutout in center of chassis (see Figure 25).
IMPORTANT: Makesurelogdoesnotcover
any burner ports (see Figure 26).
CAUTION: After installation
andperiodicallythereafter,check
to ensure that no flame comes in
contact with any log. With the
heatersetto High,checkto seeif
flames contact any log. If so, re-
position logs according to the
loginstallationinstructionsinthis
manual. Flames contacting logs
will create soot.
Figure 25 - Installing One-Piece Log Set
One Piece Log Set
Burner
"U"-shaped
Cutout in
Chassis
Chassis
Figure 26 - Installing One-Piece Log set
(Top View)
One Piece Log Set
Burner Ports
INSTALLATION
Continued
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
A. Thisappliancehasapilotwhichmust
belightedbyhand.Whenlightingthe
pilot,followtheseinstructionsexactly.
B. BEFORE LIGHTING smell all
aroundthe appliance areaforgas.Be
sureto smell nexttothe floor because
some gas is heavier than air and will
settle on the floor.
WHAT TO DO IF YOU SMELL
GAS
• Do not try to light any appliance.
• Donot touch any electric switch;do
notuseany phoneinyourbuilding.
• Immediatelycallyourgas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
C. Useonlyyourhand to push inorturn
thegascontrolknob. Neveruse tools.
If the knob will not push in or turn
by hand, don’t try to repair it, call a
qualified service technician or gas
supplier. Force or attempted repair
may result in a fire or explosion.
D. Do not use this appliance if any part
has been under water. Immediately
callaqualifiedservicetechniciantoin-
spectthe appliance and to replaceany
partofthecontrolsystemandanygas
control which has been under water.
FOR YOUR SAFETY
READ BEFORE
LIGHTING
Figure 27 - Control Knob and Ignitor
Button
Control Knob
Ignitor Button
OPERATING
FIREPLACE
Continued

16
107188
VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
CF26NT
For more information, visit www.desatech.com
NOTICE: During initial operation
of new heater, burning logs will
give off a paper-burning smell.
Orange flame will also be present.
Open damper or window to vent
smell.Thiswillonlylastafewhours.
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information
on page 15.
2. Make sure manual shutoff valve is
fully open.
3. Turncontrolknobclockwise
Clockwise
to the OFF position.
4. Wait five (5)minutes to clearoutany
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation,page15.Ifyoudon’t smell
gas, go to the next step.
5. Turn control knob counterclockwise
C-clockwise
to the PILOT position.
Press in control knob for five (5) sec-
onds (see Figure 27, page 15).
Note: You may be running this
heater for the first time after hook-
ing up to gas supply. If so, the con-
trol knob may need to be pressed in
for30 seconds orless.This will allow
air to bleed from the gas system.
• Ifcontrolknobdoesnotpopoutwhen
released, contact a qualified service
person or gas supplier for repairs.
6. With control knob pressed in, press
and release ignitor button. This will
lightpilot.Thepilot is attachedto the
front burner. If needed, keep press-
ing ignitor button until pilot lights.
Note: If pilot does not stay lit, contact
a qualified service person or gas sup-
plierforrepairs.Untilrepairsaremade,
lightpilotwithmatch.Tolightpilotwith
match,seeManualLightingProcedure.
7. Keep control knob pressed in for 30
seconds after lighting pilot.After 30
seconds, release control knob.
INSPECTING
BURNERS
OPERATING
FIREPLACE
Continued
CAUTION:Donottrytoadjust
heating levels by using the
manual shutoff valve.
Figure 24 - Pilot
Thermocouple Ignitor Electrode
Pilot Burner
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
Turn control knob clockwise
Clockwise
to
the OFF position.
Shutting Off Burners Only (pilot
stays lit)
Turn control knob clockwise
Clockwise
to
the PILOT position.
THERMOSTAT
CONTROL OPERATION
Thethermostatcontrolknobcanbesetto
anycomfortlevelbetweenHiandLo.The
thermostat will gradually modulate the
heatoutputandflameheightfromhigher
to lower settings, or pilot, in order to
maintain the comfort level you select.
The ideal comfort setting will vary by
householddependingupontheamountof
space to be heated, the output of the
central heating system, etc.
Note: Selecting the Hi setting with the
control knob will cause the burner to
remainfullyon,withoutmodulatingdown
in most cases.
MANUAL LIGHTING
PROCEDURE
1. Followsteps1through5underLight-
ing Instructions, column 1.
2. Depress control knob and light pilot
with match.
3. Keep control knob pressed in for 30
seconds after lighting pilot.After 30
seconds, release control knob. Now
follow step 8 under Lighting Instruc-
tions, column 1.
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure29showsacorrectpilotflamepattern.
Figure 30 shows an incorrect pilot flame
pattern.Theincorrectpilotflameisnotprop-
erlyheatingthethermocouple.Thiswillcause
the thermocouple to cool. When the thermo-
couple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 30
• turn heater off (see To Turn Off Gas to
Appliance)
• seeTroubleshooting, pages 18 through 20
Thermocouple Pilot Burner
Figure 29 - Correct Pilot Flame Pattern
Figure 30 - Incorrect Pilot Flame Pattern
Thermocouple Pilot Burner
Note: If pilot goes out, repeat steps 3
through7.Thisheaterhasasafetyinter-
locksystem.Waitone(1)minuteforsys-
tem to reset before lighting pilot again.
8. Turn control knob counterclockwise
C-clockwise
to desired heating level. The
burnersshould light.Setcontrolknob
to any heat level between HI and LO.

17
107188
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BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the
holes in the fitting at the burner entrance.
These holes may become blocked with dust
or lint. Periodically inspect these holes for
any blockage and clean if needed. Blocked
air holes will create soot.
MAIN BURNER
Periodically inspect all burner flame holes
with the heater running. All slotted burner
flame holes should be open with yellow
flamepresent. All round burnerflameholes
should be open with a small blue flame
present. Some burner flame holes may be-
come blocked by debris or rust, with no
flame present. If so, turn off heater and let
cool. Either remove blockage or replace
burner. Blocked burner flame holes will
create soot.
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burners, and cir-
culating air passageways of
heaterclean.Inspecttheseareas
of heater before each use. Have
heaterinspectedyearlybyaquali-
fied service person. Heater may
needmorefrequentcleaningdue
to excessive lint from carpeting,
bedding material, pet hair, etc.
CABINET
Air Passageways
• Use a vacuum cleaner or pressurized air
to clean.
Exterior
• Use a soft cloth dampened with a mild
soap and water mixture. Wipe the cabi-
net to remove dust.
CLEANING BURNER
INJECTOR HOLDER AND
PILOT AIR INLET HOLE
The primary air inlet holes allow the proper
amount of air to mix with the gas. This
provides a clean burning flame. Keep these
holes clear of dust, dirt, lint, and pet hair.
Clean these air inlet holes prior to each
heating season. Blocked air holes will cre-
ate soot. We recommend that you clean the
unit every three months during operation
andhaveheaterinspectedyearlybyaquali-
fied service person.
Wealsorecommendthatyoukeeptheburner
tubeandpilotassemblycleanandfreeofdust
anddirt. To clean these parts we recommend
usingcompressed air no greaterthan 30 PSI.
Yourlocalcomputerstore,hardwarestore,or
home center may carry compressed air in a
can. You can use a vacuum cleaner in the
blow position. If using compressed air in a
can, please follow the directions on the can.
Ifyoudon'tfollowdirectionsonthecan, you
could damage the pilot assembly.
1. Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
2. Inspect burners, pilot, and primary air
inlet holes on injector holder for dust
and dirt (see Figure 31).
3. Blow air through the ports/slots and
holes in the burners.
4. Check the injector holder located at the
endof the burnertubeagain. Remove any
large particles of dust, dirt, lint, or pet hair
withasoftclothorvacuumcleanernozzle.
5. Blow air into the primary air holes on
the injector holder.
6. In case any large clumps of dust have
now been pushed into the burner repeat
steps 3 and 4.
Clean the pilot assembly also. A yellow tip on
thepilotflameindicatesdustanddirtinthepilot
assembly. There is a small pilot air inlet hole
about two inches from where the pilot flame
comesoutofthepilotassembly(seeFigure32).
Withtheunitoff,lightlyblowairthroughtheair
inlet hole. You may blow through a drinking
straw if compressed air is not available.
Figure 31 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Injector Holder
Primary Air Inlet
Holes
Figure 32 - Pilot Inlet Air Hole
Burner
Tube
Pilot
Assembly
Pilot Air
Inlet
Hole
Ports/Slots
INSPECTING
BURNERS
Continued

18
107188
VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
CF26NT
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TROUBLESHOOTING WARNING: Turn off fireplace
andletcoolbeforeservicing.Only
aqualifiedservicepersonshould
service and repair fireplace.
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot.ThiscandamageODS/
pilot unit.
POSSIBLE CAUSE
1. Ignitor electrode not connected to igni-
tor cable
2. Ignitor cable pinched or wet
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ignitor electrode broken
7. Ignitor electrode positioned wrong
1. Gas supply turned off or equipment
shutoff valve closed
2. Control knob not in PILOT position
3. Control knob not pressed in while in
PILOT position
4. Air in gas lines when installed
5. ODS/pilot is clogged
6. Gas regulator setting is not correct
1. Control knob not fully pressed in
2. Control knob not pressedinlong enough
3. Equipment shutoff valve not fully open
4. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem could be caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
5. Thermocouple connection loose at con-
trol valve
6. Thermocouple damaged
7. Control valve damaged
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
3. Tighten nutholding piezo ignitor tobase
panel of log set. Nut is located behind
base panel.
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace piezo ignitor
7. Replace piezo ignitor
1. Turn on gas supply or open equipment
shutoff valve
2. Turn control knob to PILOT position
3. Press in control knob while in PILOT
position
4. Continue holding down control knob.
Repeat igniting operation until air is re-
moved
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 17) or replace ODS/
pilot assembly
6. Replace gas control
1. Press in control knob fully
2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Fully open equipment shutoff valve
4. A) Contact local natural gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 17) or replace ODS/
pilot assembly
5. Hand tighten until snug, then tighten 1/4
turn more
6. Replace thermocouple
7. Replace control valve
OBSERVED PROBLEM
When ignitor button is pressed, there is no
spark at ODS/pilot
When ignitor button is pressed, there is
spark at ODS/pilot but no ignition
ODS/pilot lights but flame goes out when
control knob is released
Note: For additional help, visit DESA
International’stechnicalservicewebsite
at www.desatech.com.
Note: Alltroubleshootingitemsarelistedin
order of operation.
www.desatech.com

19
107188
OWNER’S MANUAL
For more information, visit www.desatech.com
www.desatech.com
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Burner does not light after ODS/pilot is lit
Delayed ignition burner
Burner backfiring during combustion
Slightsmoke or odor during initial operation
Moisture/condensationnoticedonwindows
Heater produces a whistling noise when
burner is lit
Whitepowderresidueformingwithinburner
box or on adjacent walls or furniture
REMEDY
1. Clean burners (see Cleaning and Mainte-
nance, page 17) or replace burner orifice
2. Contact local natural gas company
3. Replace burner orifice
1. Contact local natural gas company
2. Clean burners (see Cleaning and Mainte-
nance, page 17) or replace burner orifice
1. Clean burners (see Cleaning and Mainte-
nance, page 17) or replace burner orifice
2. Replace damaged burner
3. Replace gas control
1. Check burners for dirt and debris. If
found, clean burners (see Cleaning and
Maintenance, page 17)
2. Replace gas control
3. Problem will stop after a few hours of
operation
1. Refer to Air for Combustion and Venti-
lation requirements (page 4)
1. Turn control knob to LO position and
let warm up for a minute
2. Operate burners until air is removed
from line. Have gas line checked by lo-
cal natural gas company
3. Observe minimum installation clear-
ances (see pages 7 through 9)
4. Clean burners (see Cleaning and Mainte-
nance, page 17) or replace burner orifice
1. Turn heater off when using furniture
polish, wax, carpet cleaners, or similar
products
POSSIBLE CAUSE
1. Burner orifice clogged
2. Inlet gas pressure is too low
3. Burner orifice diameter is too small
1. Manifold pressure is too low
2. Burner orifice clogged
1. Burner orifice is clogged or damaged
2. Damaged burners
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
3. Residues from manufacturing processes
and logs curing
1. Not enough combustion/ventilation air
1. Turning control knob to HI position
when burner is cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice
1. When heated, vapors fromfurniture pol-
ish, wax, carpet cleaners, etc. turn into
white powder residue
Continued

20
107188
VENT-FREE NATURAL GAS BAY FRONT FIREPLACE
CF26NT
For more information, visit www.desatech.com
www.desatech.com
TROUBLESHOOTING
Continued
WARNING: 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.
• Immediatelycallyourgassupplierfromaneighbor’sphone.Followthe
gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
POSSIBLE CAUSE
1. Metal expanding while heating or con-
tracting while cooling
1. Heater burning vapors from paint, hair
spray, glues, cleaners, chemicals, new
carpet, etc. (See IMPORTANT state-
ment above)
2. Gas leak. SeeWarning statement at
top of page
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. SeeWarning statement at
top of page
2. Control valve defective
1. Foreign matter between control valve
and burner
2. Gas leak. SeeWarning statement at
top of page
OBSERVED PROBLEM
Heater produces a clicking/ticking noise
just after burner is lit or shut off
Heater produces unwanted odors
Heater shuts off in use (ODS operates)
Gas odor even when control knob is in OFF
position
Gas odor during combustion
REMEDY
1. This is common with most heaters. If
noise is excessive, contact qualified ser-
vice person
1. Open window and ventilate room. Stop
usingodorcausing products while heater
is running
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 14)
1. Open window and/or door for ventilation
2. Contact local natural gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 17)
1. Locate and correct all leaks (see Check-
ing Gas Connections, page 14)
2. Replace control valve
1. Take apart gas tubing and remove for-
eign matter
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 14)
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning
supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles,
etc.,createfumes. Thesefumesmaymixwithcombustionairandcreate odors.Theseodors
will disappear over time.