Desa GCP10TGCN20T Original instructions

VENT-FREE BLUE FLAME
GAS HEATER
SAFETY INFORMATION AND
INSTALLATION MANUAL
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WARNING: This is an unvented gas-fired
heater. It uses air (oxygen) from the room
in which it is installed. Provisions for ad-
equatecombustionandventilationairmust
be provided. Refer to Air For Combustion
and Ventilation on page 4 of this manual.
WARNING:Improperinstallation,adjust-
ment,alteration,service,ormaintenance
can cause injury or property damage.
Refer to this manual for correct installa-
tion and operational procedures. For as-
sistance or additional information con-
sult a qualified installer, service agency,
or the gas supplier.
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
WARNING: If the information in this manual is
not followed exactly, a fire or explosion may
result causing property damage, personal in-
jury, or loss of life.
— Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas
supplier’s instructions.
• Ifyou cannotreach yourgas supplier,call
the fire department.
— Installation and service must be performed
by a qualified installer, service agency, or
the gas supplier.
GCN6, GCP6
GCN10T, GCP10T
GCN20T, GCP20T
Unvented room heaters are for installa-
tion in SINGLE FAMILY TYPE RESI-
DENCES ONLY, and the installation is
limited to ONE (1) unit per residence.
CR94-001 UNVENTED
ROOM HEATER

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SAFETY INFORMATION
WARNINGS
IMPORTANT: Read this owner’s manual carefully and
completely before trying to assemble, operate, or ser-
vicethisheater. Improperuseof this heatercancause
serious injury or death from burns, fire, explosion,
electrical shock, and carbon monoxide poisoning.
DANGER: Carbon monoxide poisoning may lead
to death!
Carbon Monoxide Poisoning: Early signs of carbon monoxide
poisoningresemble theflu, with headaches,dizziness, ornausea. If
you have these signs, the heater may not be working properly. Get
fresh air at once! Have heater serviced. Some people are more
affected by carbon monoxide than others. These include pregnant
women, persons with heart or lung disease or anemia, those under
the influence of alcohol, and those at high altitudes.
Natural and Propane/LP Gas: Natural and propane/LP gases are
fuel gases. Fuel gases are odorless. An odor-making agent is added
to fuel gases. The odor helps you detect a fuel gas leak. However,
the odor added to fuel gas can fade. Fuel gas may be present even
though no odor exists.
Make certain you read and understand all warnings. Keep this
manual for reference. It is your guide to safe and proper operation
of this heater.
WARNING: Any change to this heater or its
controls can be dangerous.
WARNING: Do not use any accessory not ap-
proved for use with this heater.
TABLE OF CONTENTS
SAFETY INFORMATION
WARNING: Do not use a blower insert, heat
exchangerinsertorotheraccessorynotapprovedfor
use with this heater.
Childrenandadultsshouldbealertedtothehazardof
high surface temperature and should stay away to
avoid burns or clothing ignition.
Surface of heater becomes very hot when running
heater. Heater will remain hot for a time after shut-
down. Allow surface to cool before touching.
Any safety screen or guard removed for servicing the
appliancemustbereplacedpriortooperationtheheater.
Due to high temperatures, the appliance should be
located out of traffic and away from furniture and
draperies.
Do not place clothing or other flammable material on or
neartheappliance.Neverplaceanyobjectsontheheater.
Carefully supervise young children when they are in
the same room with heater.
Make sure grill guard is in place before running
heater.
Keeptheappliance areaclearand free fromcombus-
tiblematerials,gasoline,andotherflammablevapors
and liquids.
TABLE OF CONTENTS
SAFETY INFORMATION ............................................................ 2
UNPACKING ............................................................................... 3
PRODUCT IDENTIFICATION ..................................................... 3
PRODUCT FEATURES .............................................................. 3
LOCAL CODES........................................................................... 4
AIR FOR COMBUSTION AND VENTILATION ........................... 4
INSTALLATION ........................................................................... 6
OPERATING HEATER.............................................................. 14
INSPECTING BURNER ............................................................ 15
CLEANING AND MAINTENANCE ............................................ 16
TROUBLESHOOTING .............................................................. 17
ILLUSTRATED PARTS BREAKDOWNAND PARTS LIST ....... 20
SPECIFICATIONS..................................................................... 26
SERVICE CENTER/PARTS CENTRAL .................................... 26
OWNER’S REGISTRATION FORM .......................................... 27
REPLACEMENT PARTS .......................................................... 29
SERVICE HINTS....................................................................... 29
TECHNICAL SERVICE ............................................................. 29
SERVICE PUBLICATIONS ....................................................... 29
ACCESSORIES ........................................................................ 29
WARRANTY INFORMATION ...................................... Back Cover

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SAFETY INFORMATION
UNPACKING
PRODUCT IDENTIFICATION
PRODUCT FEATURES
SAFETY INFORMATION
Continued
PRODUCT IDENTIFICATION
PRODUCT FEATURES
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion Sensing (ODS)
safety shutoff system. The ODS/pilot is a required feature for vent-
free room heaters. The ODS/pilot shuts off the heater if there is not
enough fresh air.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system requires no matches,
batteries, or other sources to light heater.
THERMOSTATIC HEAT CONTROL
Thermostat models have a thermostat sensing bulb and a control
valve.Thisresultsinthegreatestheatercomfort.Thiscanalsoresult
in lower gas bills.
Figure 1 - Vent-Free Gas Heater
Control Knob
Piezo Ignitor
Button
Glass
Panel
Grill
Guard
Front
Panel
Heater
Cabinet
Installation and repair should be done by a qualified
service person. The appliance should be inspected
and serviced before use and at least annually by a
professional service person. More frequent cleaning
mayberequiredduetoexcessivelintfromcarpeting,
etc.Itis imperative that control compartments,burn-
ers and circulating air passageways of the appliance
be kept clean.
1. This appliance is only for use with the type of gas indicated on
the rating plate. This appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s) inside any structure.
Locate propane/LP supply tank(s) outdoors.
3. Do not install in a bedroom or a bathroom.
4. 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
5. This heater needs fresh, outside air ventilation to run properly.
This heater has an Oxygen Depletion Sensing (ODS) safety
shutoff system. The ODS shuts down the heater if not enough
fresh air is available. See Air for Combustion and Ventilation,
pages 4 through 6.
6. Keep all air openings in the front and bottom of heater clear and
free of debris. This will insure enough air for proper combustion.
7. If heater and pilot shuts off unexpectedly, do not relight the
pilot until you provide fresh, outside air. If heater keeps shut-
ting off, have it serviced.
8. Do not run heater
• where flammable liquids or vapors are used or stored
• under dusty conditions
9. Before using furniture polish, wax, carpet cleaner, or similar
products, turn heater off. If heated, the vapors from these prod-
ucts may create a white powder residue within burner box or
on adjacent walls or furniture.
10. Do not use heater if any part has been under water. Immedi-
ately call a qualified service technician to inspect the room
heater and to replace any part of the control system and any
gas control which has been under water.
11. Turn off heater and let cool before servicing. Only a qualified
service person should service and repair heater.
12. Operating heaterabove elevations of4,500 feet (1370 m)could
cause pilot outage due to lower levels of oxygen in the air.
13. To prevent performance problems, do not use propane/LPfuel
tank of less than 100 lbs. (45 kg) capacity.
Piezo Ignitor
Button
Control Knob
6,000/10,000 Btu/Hr 20,000 Btu/Hr
14. Provide adequate clearances around air openings.
15. Before using the heater, provide adequate ventilation.An area
of 10 square inches (65 cm2) of opening of a window or roof
vent is needed for adequate combustion and ventilation air.
UNPACKING
1. Remove heater from carton.
2. Removeall protective packagingapplied to heaterforshipment.
3. Check heater for any shipping damage. If heater is damaged,
promptly inform dealer where you bought heater.

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AIR FOR COMBUSTION AND
VENTILATION
WARNING: This heater shall not be installed in a
confined space or unusually tight construction un-
less provisions are provided for adequate combus-
tion and ventilation air. Read the following instruc-
tionsto insureproperfreshairforthisand otherfuel-
burning appliances in your home.
Today’s homes are built more energy efficient than ever. New materi-
als, increased insulation, and new construction methods help reduce
heat loss in homes. Home owners weather strip and caulk around
windowsanddoorstokeepthecoldairoutandthewarmairin.During
heatingmonths,home owners wanttheirhomesas airtight aspossible.
While it is good to make your home energy efficient, your home
needs to breathe. Fresh air must enter your home. All fuel-burning
appliances need fresh air for proper combustion and ventilation.
Exhaustfans,fireplaces,clothesdryers,andfuelburningappliances
drawairfromthehousetooperate.Youmustprovideadequatefresh
air for these appliances. This will insure proper venting of vented
fuel-burning appliances.
PROVIDING ADEQUATE VENTILATION
The following are excerpts from CAN/CGA B149.1 Natural Gas
InstallationCode or CAN/CGA B149.2PropaneInstallation Code.
All spaces in homes fall into one of the three following ventilation
classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 will help you classify your
space and provide adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may provide enough
fresh air for combustion and ventilation. However, in buildings of
unusually tight construction, you must provide additional fresh air.
Unusually tight construction is defined as construction
where:
a. walls and ceilings exposed to the outside 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 open-
ings gasketed or sealed
and
b. weather strippinghas been addedon openable windows
and doors
and
c. caulking or sealants are applied to areas such as joints
around window and door frames, between sole plates
andfloors,between wall-ceilingjoints,betweenwall pan-
els, at penetrations for plumbing, electrical, and gas
lines, and at other openings.
If your home meets all of the three criteria above, you must
provide additional fresh air. See
Ventilation Air From Out-
doors
, page 6 .
If your home does not meet all of the three criteria above,
proceedto
DeterminingFresh-AirFlowForHeaterLocation,
page 5.
Confined and Unconfined Space
The Canadian Gas Association Certification Requirement, CGA
CR94-001 REV. 2 states that when combustion air supply is for the
unvented room heater only, it shall be sized at the rate of one (1)
square inch per 5000 BTU/HR (1.5 KW) from outdoors or the
manufacturer’sspecification(whicheverisgreater).However,com-
bustion air is acceptable when available from the principal heat
source and sized to the current CAN/CGA-B149.1 or .2 require-
ments. Where unvented equipment is installed in an area separated
from a combustion air supply by a door, then permanent openings,
grillsorlouversshallbeprovided.Oneshallbewithin18inches(46
cm)fromthe ceilingandone18inches(46cm)from thefloor,sized
to one (1) square inch per 1000 BTU/HR (0.29 KW) to allow free
movement of air with the source of combustion air supply.
LOCAL CODES
AIR FOR COMBUSTION AND VENTILATION
Providing Adequate Ventilation
LOCAL CODES
Installand useheater with care.Follow alllocal codes. Inthe absenceof
local codes, use the latest edition of CAN/CGA B149.1 Natural Gas
InstallationCodeorCAN/CGAB149.2PropaneInstallationCode*.
*Available from www.csa.ca or 1-800-463-6727 (call your local
gas company for your local codes).

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WARNING: If the area in which the heater may be
operatedissmallerthanthatdefinedasanunconfined
space or if the building is of unusually tight construc-
tion,provideadequate combustion andventilationair
by one of the methods described in CAN/CGA B149.1
Natural Gas Installation Code or CAN/CGA B149.2
Propane Installation Code or applicable local code.
AIR FOR COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR
HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Usethis worksheet todetermineif youhave aconfined orunconfinedspace.
Space:Includestheroominwhichyouwillinstallheaterplusanyadjoining
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. (m3) (volume of
space)
Example: Space size 20 ft. (6.1 m) (length) x 16 ft. (4.88 m) (width) x
8 ft. (2.44 m) (ceiling height) = 2560 cu. ft. (72.6m3) (volume of space)
Ifadditional ventilationto adjoiningroom issuppliedwith grillsor open-
ings, 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
(kW) the space can support.
__________ (volume of space) x 20 = [Maximum Btu/Hr (kW) the
space can support]
Example: 2560 cu. ft. (72.6m3) (volume of space) x 20 = 51,200
[maximum Btu/Hr (kW) the space can support]
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater _____________ Btu/Hr (kW)
Gas water heater* _____________ Btu/Hr (kW)
Gas furnace _____________ Btu/Hr (kW)
Vented gas heater _____________ Btu/Hr (kW)
Gas fireplace logs _____________ Btu/Hr (kW)
Other gas appliances* + _____________ Btu/Hr (kW)
Total = _____________ Btu/Hr (kW)
* Do not include direct-vent gas appliances. Direct-vent draws com-
bustion air from the outdoors and vents to the outdoors.
Example:
Gas water heater _____________ Btu/Hr (kW)
Vent-free heater + _____________ Btu/Hr (kW)
Total = _____________ Btu/Hr (kW)
4. Compare the maximum Btu/Hr the space can support with the actual
amount of Btu/Hr used.
__________________
Btu/Hr (kW)(maximum thespacecan support)
__________________ Btu/Hr (kW)(actual amount of Btu/Hrused)
Example: 51,200 Btu/Hr (15kW) (maximum the space can support)
60,000 Btu/Hr (17.6kW) [actual amount of Btu/Hr (kW)
used]
AIR FOR COMBUSTION AND VENTILATION
Determining Fresh-Air Flow For Heater Location
The space in the above example is a confined space because the actual Btu/Hr
(kW) used is more than the maximum Btu/Hr (kW) the space can support.
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 adjoining
roomoradd ventilation grills between rooms. SeeVentilationAir From
Inside Building, page 6.
B. Vent room directly to the outdoors. See Ventilation Air From Out-
doors, page 6.
C. Install a lower Btu/Hr (kW) heater, if lower Btu/Hr (kW) size makes
room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr (kW) the space
can support, the space is an unconfined space. You will need no additional
fresh air ventilation.
40,000 (11.7)
20,000 (5.9)
60,000 (17.6)

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INSTALLATION
Installation must conform with local codes or, in the
absence of local codes, with the current standard
CAN/CGA B149.1 Natural Gas Installation Code or
CAN/CGA B149.2 Propane Installation Code
NOTICE: This heater is intended for use as supple-
mental heat. Use this heater along with your primary
heating system. Do not install this heater as your
primary heat source. If you have a central heating
system, you may run system’s circulating blower
while using heater. This will help circulate the heat
throughoutthehouse.Intheeventofapoweroutage,
you can use this heater as your primary heat source.
WARNING: A qualified service person must in-
stall heater. Follow all local codes.
CHECK GAS TYPE
Useonlythecorrect type ofgas (naturalorpropane/LP).Ifyourgas
supply is not the correct gas type, do not install heater. Call dealer
where you bought heater for proper type heater.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining unconfined space.
When ventilating to an adjoining unconfined space, you must
provide two permanent openings: one within 18" (45 cm) of the
ceiling and one within 18" (45 cm) of the floor on the wall
connecting the two spaces (see options 1 and 2, Figure 2). You can
also remove door into adjoining room (see option 3, Figure 2).
Follow CAN/CGA B149.1 Natural Gas Installation Code or CAN/
CGA B149.2 Propane Installation Code for required size of venti-
lation grills or ducts.
Ventilation Air From Outdoors
Provideextrafreshairbyusingventilationgrillsorducts.Youmust
provide two permanent openings: one within 18" (45 cm) of the
ceilingandonewithin18"(45 cm) of thefloor. Connect theseitems
directlytotheoutdoorsorspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces. Follow CAN/CGA B149.1 Natural
Gas Installation Code or CAN/CGA B149.2 Propane Installation
Code for required size of ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet or outlet air into
attic if attic has a thermostat-controlled power vent. Heated air
entering the attic will activate the power vent.
Figure 2 - Ventilation Air from Inside Building
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
AIR FOR COMBUSTION AND
VENTILATION
Continued
Figure 3 - Ventilation Air from Outdoors
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Ventilation
Grills
into Adjoining
Room,
Option 1
18"
(45 cm)
AIR FOR COMBUSTION AND VENTILATION
Ventilation Air
INSTALLATION
Check Gas Type
18"
(45 cm)

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36" (91.5 cm
)
3" (7.7 cm)
CEILING
Minimum
6"
(15.3 cm)
Minimum
From
Sides Of
Heater
Right
Side
Left
Side
INSTALLATION
Installation Items
Locating Heater
INSTALLATION ITEMS
Beforeinstallingheater,makesureyouhave the items listedbelow.
• for propane/LP gas, external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• ground joint union
• sediment trap
• tee joint
• pipe wrench
• for natural gas, test gauge connection*
* A CSA design-certified equipment shutoff valve with 1/8" NPT
tap is an acceptable alternative to test gauge connection. Purchase
the optional CSA design-certified equipment shutoff valve from
your dealer. See Accessories, page 29.
LOCATING HEATER
This heater is designed to be mounted on a wall.
WARNING: Maintain the minimum clearances
shown in Figure 4. If you can, provide greater clear-
ances from floor, ceiling, and joining wall.
Models GCN20T and GCP20T only: You can locate heater on
floor,awayfromawall.Anoptionalfloormountingstandisneeded.
Purchase the floor mounting stand from your dealer. See Accesso-
ries, page 29.
WARNING: Never install the heater
•in a bedroom or bathroom
•in a recreational vehicle
•where curtains, furniture, clothing, or other flam-
mableobjects arelessthan 36inches (92cm)from
the front, top, or sides of the heater
•as a fireplace insert
•in high traffic areas
•in windy or drafty areas Minimum To Top Surface
Of Carpeting, Tile Or Other
Combustible Material
6,000 Btu/Hr
(1.8 kW)
Model Shown
Figure4-MountingClearancesAsViewedFromFrontofHeater
INSTALLATION
Continued
CAUTION: This heater creates warm air currents.
These currents move heat to wall surfaces next to
heater. Installing heater next to vinyl or cloth wall
coveringsoroperatingheaterwhereimpurities(such
asbutnotlimitedto,tobaccosmoke,aromaticcandles,
cleaning fluids, oil or kerosene lamps, etc.) in the air
exist, may discolor walls or cause odors.
IMPORTANT: Vent-freeheaters add moisturetothe air.Although
this is beneficial, installing heater in rooms without enough venti-
lation air may cause mildew to form from too much moisture. See
Air for Combustion and Ventilation, pages 4 through 6. If high
humidity is experienced, a dehumidifier may be used to help lower
the water vapor content in the air.
CAUTION:Ifyouinstalltheheaterinahomegarage
•heater pilot and burner must be at least 18 inches
(46 cm) above floor
•locate heater where moving vehicle will not hit it
For convenience and efficiency, install heater
• where there is easy access for operation, inspection, and service
• in coldest part of room
For 20,000 Btu/hr (5.9 kW) models, an optional fan kit is available
from your dealer. See Accessories, page 29. If planning to use fan,
locate heater near a grounded electrical outlet. Outlet must be
groundedinaccordancewithlocalcodes,withthecurrentCanadian
Electrical Code Part 1 CSA C22.1.

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INSTALLATION
Thermostat Sensing Bulb (Thermostat Models Only)
Installing Heater To Wall 6,000 and 10,000 Btu/Hr Models (1.8 and 2.9 kW)
INSTALLATION
Continued
THERMOSTAT SENSING BULB
(Thermostat Models Only)
Thethermostatsensingbulbhasbeenplacedinsidetheheaterfor
protection during shipping.
Locating Thermostat Sensing Bulb (for thermostat
applications)
1. Removefrontpanelofheater[for10,000 Btu/Hr (2.9 KW) heater,
see Figure 11 page 9 or for 20,000 Btu/Hr (5.9 KW) heater see
Figure 14, page 10].
2. Locate thermostat sensing bulb just under burner assembly.
IMPORTANT: Attachthermostatsensingbulbtobackofheaterfor
proper operation.
Attaching Thermostat Sensing Bulb
1. Remove thermostat sensing bulb from holders inside heater.
Route through slot opening in bottom of heater.
2. Place clamp on thermostat sensing bulb as shown in Figure 5.
Clamp is provided in hardware package.
3. Snap clamp into upper mounting hole as shown in Figure 5.
Mounting hole is located on lower left edge on back of heater.
Make sure the thermostat sensing bulb is pointing up.
Figure 5 - Attaching Thermostat Sensing Bulb
Figure 6 - Mounting Screw Locations
Mounting
Screw
Locations
8 7/8"
(22.5 cm)
Blue Flame
Minimum To
Maintain 6"
Clearance
From Wall
7 3/4"
(19.7 cm)
20 1/4" (51.4 cm)
Minimum To
Maintain 3" (7.6
cm) Clearance
From Floor
FLOOR
JOINING WALL
INSTALLING HEATER TO WALL 6,000 AND
10,000 BTU/HR MODELS (1.8 AND 2.9 KW)
Marking Screw Locations
1. Determine where you will locate heater.
WARNING:Maintain minimum clearancesshown
in Figure 6. If you can, provide greater clearances
from floor and joining wall.
2. Mark two mounting screw locations on wall (see Figure 6).
Figure 7 - Folding Anchor
Thin Walls (1/4" to 1/2" thick)
(1.6 to 1.2 cm)
Figure8-PoppingOpenAnchor
Wings For Thin Walls
Installing Two Mounting Screws
Note: Wall anchorsandmounting screwsarein hardwarepackage.
The hardware package is provided with heater.
Attaching to wall stud method
For attaching mounting screw to wall stud
1. Drill hole at marked location using 9/64" drill bit.
2. Insert mounting screw into wall stud.
3. Tighten screw until 1/16" (1.6 mm) space (thickness of penny)
is between screwhead and wall.
Attaching to wall anchor method
Followinstructionsbelowtoattach mounting screws tohollow walls
(wall areas between studs) or solid walls (concrete or masonry).
1. Drill holes at marked locations using 5/16" drill bit. For solid
walls (concrete or masonry), drill at least 1 1/4" (3.2 cm) deep.
2. Fold wall anchor (see Figure 7).
3. Insert wall anchor (wings first) into hole. Tap anchor flush
to wall.
4. For thin walls [1/2" (1.27 cm) or less], insert red key into wall
anchor. Push red key to “pop” open anchor wings (see Figure 8).
IMPORTANT: Do not hammer key! For thick walls [over 1/2"
(1.27 cm) thick] or solid walls, do not pop open wings.
Clamp
Thermostat
Sensing Bulb

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Figure 12 - Installing Bottom Mounting Screw
INSTALLATION
Installing Heater To Wall 6,000 and 10,000 Btu/Hr Models (1.8 and 2.9 kW) (Cont.)
Installing Heater To Wall 20,000 Btu/Hr Models (5.9 kW)
Installing Bottom Mounting Screw
1. Locate bottom mounting hole. This holeis nearbottom onback
panel of heater (see Figure 12).
2. Mark screw location on wall.
3. Remove heater from wall.
4. If installing bottom mounting screw into hollow or solid wall,
install wall anchor. Follow steps 1 through 5 under Attaching To
Wall Anchor Method, page 10. If installing bottom mounting
screw into wall stud, drill hole at marked location using 9/64"
drill bit.
5. Replace heater on wall.
6. Insert bottom anchor screw through back panel into bottom
anchor or drilled hole (see Figure 12).
7. Tighten screw until heater is firmly secured to wall. Do not
over tighten.
Note: Do not replace front panel at this time. Replace front
panel after making gas connections and checking for leaks (see
pages 11 and 12).
INSTALLATION
Continued
Removing Front Panel Of Heater
1. Remove two screws near bottom corners of front panel.
2. Lift straight up on grill guard until it stops. Grill guard will slide
up about 1/4" (6 mm).
3. Pull bottom of front panel forward, then down.
Figure 11 - Removing Front Panel Of Heater
Figure 9 - Tightening Anchors
Thin or
Thick Wall
(thick wall
shown)
Solid
Wall
1/16"
Space
(1.6 mm)
Placing Heater On Mounting Screws
1. Locate two keyhole slots on back panel of heater (see Figure 10).
2. Place large openings of slots over screwheads. Slide heater
down until screws are in small portion of slots.
Figure 10 - Location Of Keyhole Slots On Back Panel Of Heater
Keyhole Slots
INSTALLING HEATER TO WALL
20,000 BTU/HR MODELS (5.9 KW)
Mounting Bracket
Locate mounting bracket in heater carton. Remove mounting bracket
from heater carton.
Figure 13 - Mounting Bracket
5. Tighten two screws until 1/16" (1.6 mm) space (thickness of
penny) is between screwheads and wall (see Figure 9).

112157-01A
10
For more information, visit www.desatech.com
For more information, visit www.desatech.com
INSTALLATION
Continued
Methods For Attaching Mounting Bracket To Wall
Onlyuselastholeoneachendofmountingbrackettoattachbracket
to wall. These two holes are 14 inches (35.5 cm) apart from their
centers. Attach mounting bracket to wall in one of two ways:
1. Attaching to wall stud
2. Attaching to wall anchor
Attaching to Wall Stud: This method provides the strongest hold.
Insertmountingscrewsthroughmountingbracketandintowallstuds.
Attaching to Wall Anchor: This method allows you to attach
mounting bracket to hollow walls (wall areas between studs) or to
solid walls (concrete or masonry).
Decide which method better suits your needs. Either method will
provide a secure hold for the mounting bracket.
Figure 14 - Removing Front Panel Of Heater
Removing Front Panel Of Heater (20,000 Btu/Hr
Models Only) (5.9 kW)
1. Removethe four paintedscrews,twoon eachsideoffront panel.
2. Pull bottom of front panel forward, then out.
3. Remove any remaining packaging materials.
WARNING:Maintain minimum clearancesshown
in Figure 15. If you can, provide greater clearances
from floor and joining wall.
Marking Screw Locations
1. Tape mounting bracket to wall where heater will be located.
Make sure mounting bracket is level.
2. Mark screw locations on wall (see Figure 15).
Note: Only mark last hole on each end of mounting bracket.
Insert mounting screws through these holes only.
3. Remove tape and mounting bracket from wall.
Figure 15 - Mounting Bracket Clearances
14"
(35.6 cm)
18
3
/ 4 "
(47.7 cm)
Min.
8"
(20.3 cm)
Min.
Adjoining Wall
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor
Attaching Mounting Bracket To Wall
Note: Wallanchors,mountingscrews,andspacersareinhardware
package. The hardware package is provided with heater.
Attaching To Wall Stud Method
For attaching mounting bracket to wall studs
1. Drill holes at marked locations using 9/64" drill bit.
2. Place mounting bracket onto wall. Line up last hole on each
end of bracket with holes drilled in wall.
3. Insert mounting screws through bracket and into wall studs.
4. Tighten screws until mounting bracket is firmly fastened to
wall studs.
Attaching To Wall Anchor Method
For attaching mounting bracket to hollow walls (wall areas be-
tween studs) or solid walls (concrete or masonry)
1. Drill holes at marked locations using 5/16" drill bit. For solid
walls (concrete or masonry), drill at least 1" (2.5 cm) deep.
2. Fold wall anchor as shown in Figure 16.
3. Insert wall anchor (wings first) into hole. Tap anchor flush
to wall.
4. For thin walls [1/2" (1.27 cm) orless], insert red key into wall
anchor. Push red key to “pop” open anchor wings.
IMPORTANT: Do not hammer key!
For thick walls [over 1/2" (1.27 cm) thick] or solid walls, do
not pop open wings.
5. Place mounting bracket onto wall. Line up last hole on each
end of bracket with wall anchors.
6. Insert mounting screws through bracket and into wall anchors.
7. Tightenscrews until mounting bracketisfirmlyfastenedtowall.
Figure 16 - Folding Anchor Figure 17- Popping Open
Anchor Wings For Thin Walls
INSTALLATION
Installing Heater To Wall 20,000 Btu/Hr Models (5.9 kW) (Cont.)