UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER
SAFETY INFORMATION AND INSTALLATION MANUAL
MODELS CBN20T, CBP20T, CBN30T, CBP30T, CBT20NT, CBT20PT,
CBT30NT AND CBT30PT
WARNING: If the information in this manual is not fol-
lowed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
•
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.
Save this manual for future reference.
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SAFETY INFORMATION
Due to high temperatures, the
applianceshouldbelocatedout
oftrafficandawayfromfurniture
and draperies.
WARNING:Thisproductcon-
tainsand/orgenerateschemicals
known to the State of California
to cause cancer or birth defects
or other reproductive harm.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
IMPORTANT: Read this owner’s
manualcarefullyandcompletely
before trying to assemble,
operate or service this heater.
Improper use of this heater can
cause serious injury or death
from burns, fire, explosion,
electrical shock and carbon
monoxide poisoning.
Surface of heater becomes very
hot when running heater. Keep
children and adults away from
hot surface to avoid burns or
clothing ignition. Heater will
remain hot for a time after shut-
down. Allow surface to cool
before touching.
DANGER:Carbonmonoxide
poisoning may lead to death!
Carefully supervise young chil-
dren when they are in the same
room with heater.
CarbonMonoxidePoisoning: Early signs of carbon
monoxide poisoning resemble the flu, with head-
aches, dizziness or nausea. 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, people with heart
or lung disease or anemia, those under the influ-
ence of alcohol and those at high altitudes.
Make sure grill guard is in place
before running heater.
Keep the appliance area clear
and free from combustible ma-
terials, gasoline and other flam-
mable vapors and liquids.
Natural and Propane/LP Gas: Natural and Propane/
LP gases are odorless. An odor-making agent is
added to these gases. 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.
1. This appliance is only for use with the type
of gas indicated on the rating plate. This ap-
pliance is not convertible for use with other
gases.
Make certain you read and understand all warn-
ings. Keep this manual for reference. It is your
guide to safe and proper operation of this heater.
2. Do not place propane/LP supply tank(s) in-
side any structure. Locate propane/LP supply
tank(s) outdoors.
WARNING: Any change to
this heater or its controls can
be dangerous.
3. This heater shall not be installed in a bedroom
or 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
neighborʼs phone. Follow the gas supplierʼs
instructions
WARNING: Do not use a
blower insert, heat exchanger
insertorotheraccessorynotap-
proved for use with this heater.
• If you cannot reach your gas supplier, call
the fire department
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SAFETY INFORMATION
PRODUCT
Continued
IDENTIFICATION
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, page 5.
Control Knob & Ignitor Button
(not seen from this view)
Heater
Cabinet
6. Keep all air openings in front and bottom of
heater clear and free of debris. This will insure
enough air for proper combustion.
7. If heater shuts off, do not relight until you
provide fresh, outside air. If heater keeps
shutting off, have it serviced.
Grill
Guard
8. Do not run heater
• where flammable liquids or vapors are used
or stored
• under dusty conditions
Glass Panel (Blue
Flame Models Only)
9. Do not use heater if any part has been under
water. Immediately 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.
Front Panel
Figure 1 - Vent-Free Gas Heater
UNPACKING
10. Turn off and let cool before servicing. Only
a qualified service person should service and
repair heater.
1. Remove heater from carton.
2. Remove all protective packaging applied to
heater for shipment.
11. Operating heater above elevations of 4,500
feet (1,371 m) could cause pilot outage.
3. Check heater for any shipping damage. If
heater is damaged, promptly return to where
you bought heater.
12. To prevent performance problems, do not use
propane/LP fuel tank of less than 100 lbs.
(45 kg) capacity.
PRODUCT FEATURES
13. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater off. If
heated, the vapors from these products may
create a white powder residue within burner
box or on adjacent walls or furniture.
SAFETY DEVICE
This heater has a pilot with an Oxygen Deple-
tion 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.
14. Provide adequate clearances around air
openings.
IGNITION SYSTEM
This heater has either a piezo ignitor or electronic
ignitor to light heater fuel supply.
LOCAL CODES
Installanduseheaterwithcare.Followalllocalcodes.In
the absence of local codes, use the latest edition of The
National Fuel Gas Code, ANSI Z223.1/NFPA 54*.
THERMOSTATIC HEAT CONTROL
*Available from:
Thermostat models have a thermostat sensing
bulb and a control valve. This results in the great-
est heater comfort. This can also result in lower
gas bills.
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
4
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Unusually Tight Construction
AIR FOR COMBUSTION
AND VENTILATION
The air that leaks around doors and windows
may provide enough fresh air for combustion and
ventilation. However, in buildings of unusually
tight construction, you must provide additional
fresh air.
WARNING:Thisheatershall
not be installed in a confined
space or unusually tight con-
struction unless provisions are
providedforadequatecombus-
tionandventilationair.Readthe
followinginstructionstoinsure
proper fresh air for this and
other fuel-burning appliances
in your home.
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
Todayʼs 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.
c. caulking or sealants are applied to
areas such as joints around window
and door frames, between sole plates
and floors, between wall-ceiling joints,
between wall panels, at penetrations
for plumbing, electrical and gas lines
and at other openings.
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.
If your home meets all of these three cri-
teria, you must provide additional fresh
air. See Ventilation Air From Outdoors,
page 7.
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.
If your home does not meet all of the
three criteria above, proceed to Determin-
ing Fresh-Air Flow For Heater Location,
page 6.
Confined and Unconfined Space
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.
The National Fuel Gas Code, ANSI Z223.1/NFPA
54 defines a confined space as a space whose
volume is less than 50 cubic feet per 1,000 Btu
per hour (4.8 m3 per kw) of the aggregate input
rating of all appliances installed in that space and
an unconfined space as a space whose volume is
not less than 50 cubic feet per 1,000 Btu per hour
(4.8 m3 per kw) of the aggregate input rating of
all appliances installed in that space. Rooms com-
municating directly with the space in which the
appliances are installed*, through openings not
furnished with doors, are considered a part of the
unconfined space.
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 5 through 7 will help
you classify your space and provide adequate
ventilation.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation grills
between them.
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The space in the above example is a confined space
because the actual Btu/Hr used is more than the maxi-
mum Btu/Hr the space can support. You must provide
additional fresh air. Your options are as follows:
AIR FOR COMBUSTION
AND VENTILATION
Continued
A. Rework worksheet, adding the space of an adjoin-
ingroom. Iftheextraspaceprovidesanunconfined
space, remove door to adjoining room or add
ventilation grills between rooms. See Ventilation
Air From Inside Building.
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Use this work sheet to determine if you have a
B. Vent room directly to the outdoors. See Ventila-
tion Air From Outdoors, page 7.
confined or unconfined space.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size
makes room unconfined.
Space: Includes the room in which you will install
heater plus any adjoining rooms with doorless pas-
sageways or ventilation grills between the rooms.
If the actual Btu/Hr used is less than the maximum
Btu/Hr the space can support, the space is an un-
confined space. You will need no additional fresh
air ventilation.
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. (6.1 m) (length) x 16
ft. (4.88 m) (width) x 8 ft. (2.44 m) (ceiling height)
= 2560 cu. ft. (72.49 m3) (volume of space)
WARNING: If the area in
which the heater may be oper-
ated is smaller than that defined
as an unconfined space or if the
building is of unusually tight
construction, provide adequate
combustion and ventilation air
byoneofthemethodsdescribed
in the National Fuel Gas Code,
ANSIZ223.1/NFPA54Section5.3
or applicable local codes.
If additional ventilation to adjoining room is
supplied with grills or openings, add the volume
of these rooms to the total volume of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
__________ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 2560 cu. ft. (72.49 m3) (volume of
space) x 20 = 51,200 (maximum Btu/Hr the space
can support)
3. Add the Btu/Hr of all fuel burning appliances in
the space.
VENTILATION AIR
Vent-free heater
Gas water heater*
Gas furnace
_____________ Btu/Hr
_____________ Btu/Hr
_____________ Btu/Hr
_____________ Btu/Hr
_____________ Btu/Hr
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 permanent
openings: one within 12" (30.4 cm) of the ceiling
and one within 12" (30.4 cm) of the floor on the
wall connecting the two spaces (see options 1 and
2, Figure 2, page 7). You can also remove door
into adjoining room (see option 3, Figure 2, page
7). 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.
Vented gas heater
Gas fireplace logs
Other gas appliances* +____________ Btu/Hr
Total =____________ Btu/Hr
* Do not include direct-vent gas appliances. Di-
rect-vent draws combustion air from the outdoors
and vents to the outdoors.
Example:
40,000
_____________ Btu/Hr
20,000
+____________ Btu/Hr
60,000
=____________ Btu/Hr
Gas water heater
Vent-free heater
Total
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)
60,000 Btu/Hr (actual amount of
Btu/Hr used)
6
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AIR FOR COMBUSTION
INSTALLATION
AND VENTILATION
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.
Continued
12"
Ventilation Grills
Into Adjoining Room,
Ventilation
Option 2
Grills
into Adjoining
Room,
Or
Remove
Door into
Adjoining
Room,
Option 1
Option 3
12"
WARNING: A qualified ser-
vice person must install heater.
Follow all local codes.
Figure 2 - Ventilation Air from Inside
Building
CHECK GAS TYPE
Ventilation Air From Outdoors
Use only the correct type of gas (natural or pro-
pane/LP). If your gas supply is not the correct gas
type, do not install heater. Call dealer where you
bought heater for proper type heater.
Provide extra fresh air by using ventilation grills
or ducts. You must provide two permanent open-
ings: one within 12" (30.4 cm) of the ceiling and
one within 12" (30.4 cm) 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.
WARNING: This appliance
is equipped for (natural or pro-
pane/LP) gas. Field conversion
is not permitted.
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.
INSTALLATION ITEMS
Before installing heater, make sure you have the
items listed below.
•
for propane/LPgas, external regulator (supplied
by installer)
Ventilated
Outlet
Attic
Air
•
•
•
•
•
•
•
•
piping (check local codes)
sealant (resistant to propane/LP gas)
equipment shutoff valve *
ground joint union
Outlet
Air
To Attic
sediment trap
To
Crawl
Space
tee joint
Inlet
Air
pipe wrench
Ventilated
Crawl Space
for natural gas, test gauge connection*
Inlet Air
* ACSAdesign-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. The optional CSA design-
certified equipment shutoff valve can be purchased
from your dealer. See Accessories, page 26.
Figure 3 - Ventilation Air from Outdoors
107882-01M
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IMPORTANT: Vent-free heaters add moisture to
the air. Although this is beneficial, installing heater
in rooms without enough ventilation air may cause
mildewto form from toomuchmoisture. See Airfor
Combustion and Ventilation, page 5. If high humid-
ity is experienced, a dehumidifier may be used to
help lower the water vapor content in the air.
INSTALLATION
Continued
LOCATING HEATER
WARNING: Maintain the
minimum clearances shown
in Figure 4. If you can, provide
greater clearances from floor,
ceiling and joining wall.
For convenience and efficiency, install heater
•
where there is easy access for operation, inspec-
tion and service
•
in coldest part of room
A wall mounting bracket is included with this
heater. An Optional Base Kit (GA4550) may be
purchased to allow the unit to be installed away
from a wall (see Accessories, page 26). Determine
which method is best for your application.
An optional fan kit is available from your dealer.
See Accessories, page 26. If planning to use fan,
locate heater near an electrical outlet.
CEILING
WARNING: Never install the
heater
6" (15.2 cm) Blue Flame
10" (25.4 cm) Plaque
Minimum
From
Sides Of
Heater
36"
(91.5 cm)
Minimum
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing or other flammable
objectsarelessthan36inches
(91.5cm)fromthefront, topor
sides of the heater
Left
Side
Right
Side
Minimum To Top
Surface Of Carpeting,
2" (5.1 cm)
Tile Or Other
• as a fireplace insert
Combustible Material
FLOOR
• in high traffic areas
• in windy or drafty areas
Figure 4 - Mounting Clearances As
Viewed From Front of Heater
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches (45.7 cm)
above floor
THERMOSTAT SENSING BULB
The thermostat sensing bulb is below the heater.
1. Place clamp on thermostat sensing bulb as
shown in Figure 5. Clamp is provided in
hardware package.
2. 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.
• locate heater where moving
vehicle will not hit it
CAUTION:Thisheatercreates
warmaircurrents.Thesecurrents
move heat to wall surfaces next
to heater. Installing heater next
to vinyl or cloth wall coverings
or operating heater where impu-
rities (such as, but not limited to,
tobaccosmoke,aromaticcandles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls or cause odors.
Thermostat
Sensing
Bulb
Clamp
Figure 5 - Attaching Thermostat Sensing
Bulb
8
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Marking Screw Locations
1. Tape mounting bracket to wall where heater
will be located. Make sure mounting bracket
is level.
INSTALLATION
Continued
INSTALLING HEATER TO WALL
Mounting Bracket
Locate mounting bracket in heater carton. Remove
mounting bracket from heater carton.
WARNING: Maintain mini-
mum clearances shown in
Figure 8. If you can, provide
greater clearances from floor
and joining wall.
Figure 6 - Mounting Bracket
2. Mark screw locations on wall (see Figure 8).
Note: Only mark last hole on each end of
mounting bracket. Insert mounting screws
through these holes only.
Removing Front Panel Of Heater
1. Remove the four painted screws, two on each
side of front panel.
3. Remove tape and mounting bracket from wall.
2. Pull bottom of front panel forward, then out.
3. Remove any remaining packaging materials.
Screw
8"
14" (35.6 cm)
(20.3
cm)
Min.
l
l
a
W
18 3/4
(47.6 cm
Min.
"
Only Insert Mounting
Screws Through Last
Hole On Each End
g
n
i
n
i
o
j
d
A
Floor
20,000 Btu/hr Models
12"
14" (35.6 cm)
Front Panel
(30.4
cm)
Figure 7 - Removing Front Panel Of Heater
Min.
l
l
a
Methods For Attaching Mounting Bracket
To Wall
Only use last hole on each end of mounting bracket
to attach bracket to wall. These two holes are 14"
(35.6 cm) apart from their centers. Attach mount-
ing bracket to wall in one of two ways:
W
Only Insert Mounting
Screws Through Last
Hole On Each End
g
18 3/4
"
(47.6 cm)
Min.
n
i
n
i
o
j
d
A
1. Attaching to wall stud
2. Attaching to wall anchor
Floor
Attaching to Wall Stud: This method provides the
strongest hold. Insert mounting screws through
mounting bracket and into wall studs.
30,000 Btu/hr Models
Figure 8 - Mounting Bracket Clearances
Attaching Mounting Bracket To Wall
Note: Wall anchors, mounting screws and spacers
are in hardware package. The hardware package
is provided with heater.
Attaching to WallAnchor: 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.
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Horizontal Slots
Mounting
INSTALLATION
Continued
Bracket
(attached
to wall)
Attaching To Wall Stud Method
For attaching mounting bracket to wall studs
1. Drill holes at marked locations using 9/64"
drill bit.
Stand-Out Tab
2. Place mounting bracket onto wall. Line up last
hole on each end of bracket with holes drilled
in wall.
Figure 11 - Mounting Heater Onto
Mounting Bracket
3. Insert mounting screws through bracket and
into wall studs.
Installing Bottom Mounting Screws
1. Locate two bottom mounting holes. These
holes are near bottom on back panel of heater
(see Figure 12).
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 between studs) or solid walls (concrete
or masonry)
2. Mark screw locations on wall.
3. Remove heater from mounting bracket.
4. If installing bottom mounting screws into
hollow or solid wall, install wall anchors.
Follow steps 1 through 4 under Attaching To
Wall Anchor Method.
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.
If installing bottom mounting screw into wall
stud, drill holes at marked locations using 9/64"
drill bit.
2. Fold wall anchor as shown in Figure 9.
3. Insert wall anchor (wings first) into hole. Tap
anchor flush to wall.
5. Replace heater onto mounting bracket.
4. For thin walls [1/2" (1.3 cm) or less], insert red
keyintowallanchor.Pushredkeyto“pop”open
anchor wings. IMPORTANT: Do not hammer
key! For thick walls [over 1/2" (1.3 cm) thick]
or solid walls, do not pop open wings.
6. Place spacers between bottom mounting holes
and wall anchor or drilled hole.
7. Hold spacer in place with one hand. With other
hand, insert mounting screw through bottom
mounting hole and spacer. Place tip of screw
in opening of wall anchor or drilled hole.
5. Place mounting bracket onto wall. Line up
last hole on each end of bracket with wall
anchors.
8. Tighten both screws until heater is firmly
secured to wall. Do not over tighten.
6. Insert mounting screws through bracket and
into wall anchors.
Note: Do not replace front panel at this time.
Replace front panel after making gas connec-
tions and checking for leaks (see page 11).
7. Tighten screws until mounting bracket is
firmly fastened to wall.
Figure 9 - Folding Figure 10 - Popping
Anchor
Open Anchor Wings
For Thin Walls
Front View
Heater
Placing Heater On Mounting Bracket
1. Locate two horizontal slots on back panel of
heater.
Wall
2. Place heater onto mounting bracket. Slide
horizontal slots onto stand-out tabs on mount-
ing bracket.
Spacer
Side View
Figure 12 - Installing Bottom Mounting
Screws
10
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CONNECTING TO GAS SUPPLY
INSTALLATION
Continued
WARNING: This appliance
requires a 3/8" NPT (National
PipeThread)inletconnectionto
the pressure regulator.
MOUNTING HEATER TO FLOOR
(OPTIONAL)
Mounting Base Feet to Heater
1. Lay heater cabinet on its back on a table with
the heater bottom overhanging the table edge.
WARNING: A qualified ser-
vicepersonmustconnectheater
to gas supply. Follow all local
codes.
2. Align holes in base foot with mounting holes
on bottom of cabinet (see Figure 13).
3. Secure base foot to heater using sheet metal
screws.
4. Repeat for other side.
Mounting Base Feet to Floor (Where
required by local code)
1. Remove front cover (see Removing Front
WARNING: For natural
gas, never connect heater to
private (non-utility) gas wells.
This gas is commonly known
as wellhead gas.
Panel of Heater, page 9).
2. Position heater with base feet in desired loca-
tion. Mark holes for drilling. Remove heater
with base.
IMPORTANT: For natural gas, check gas line
pressure before connecting heater to gas line. Gas
line pressure must be no greater than 10.5 inches of
water. If gas line pressure is higher, heater regula-
tor damage could occur.
3. For carpeted floors, make a small cut with a
sharp knife at marked locations prior to drill-
ing. If mounting base to a wood floor, drill
1/8" (3.2 mm) diameter hole, 3/4" (1.9 cm)
deep. (Do not use anchors in wood floors).
If mounting base to a concrete floor, drill with
1/4" (6.4 mm) diameter concrete drill bit, 13/8"
(3.5 cm) into floor. Insert anchors completely
into holes.
CAUTION: For propane/LP
gas, never connect heater di-
rectly to the propane/LP supply.
This heater requires an external
regulator (not supplied). Install
theexternalregulatorbetweenthe
heater and propane/LP supply.
4. Reposition heater with base feet over holes.
Secure base to floor with wood screws. See
Figure 13.
Wood
Screw
For propane/LP gas, the installer must supply an
external regulator. The external regulator will
reduce incoming gas pressure. You must reduce
incoming gas pressure to between 11 and 14 inches
of water. If you do not reduce incoming gas pres-
sure, heater regulator damage could occur. Install
the external regulator with the vent pointing down
as shown in Figure 14, page 12. Pointing the vent
down protects it from freezing rain or sleet.
Base Foot
Sheet Metal Screw
Figure 13 - Installing Base Feet
107882-01M
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Install sediment trap in supply line as shown in
Figure 15. Locate sediment trap where it is within
reach for cleaning. Locate sediment trap where
trapped matter is not likely to freeze. A sediment
trap traps moisture and contaminants. This keeps
them from going into heater controls. If sediment
trap is not installed or is installed wrong, heater
may not run properly.
INSTALLATION
Continued
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of
large enough diameter to allow
proper gas volume to heater. If
pipe is too small, undue loss of
volume will occur.
IMPORTANT: Hold the pressure regulator with
wrench when connecting it to gas piping and/or
fittings. Do not over tighten pipe connection to
regulator. The regulator body could be damaged.
Heater
Pressure
Cabinet
Regulator
Typical Inlet Pipe Diameters
20,000 Btu/Hr Models - 3/8" or greater
30,000 Btu/Hr Models - 1/2" or greater
3/8" NPT
Pipe Nipple
Installation must include 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 14).
Tee Joint
Ground Joint
Union
Reducer
Bushing to
1/8" NPT
Equipment
Shutoff
Valve *
IMPORTANT: Install an equipment shutoff valve
in an accessible location. The equipment shutoff
valve is for turning on or shutting off the gas to
the appliance.
1/8" NPT
Plug Tap
Tee
Joint
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could result
in clogged heater valves.
3"
Min
Natural Gas
Pipe
Nipple
From Gas Meter
(4" W.C. to 10.5" W.C.
Pressure)
Cap
Propane/LP From External
Regulator (11" W.C. to 14"
W.C. Pressure)
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Figure 15 - Gas Connection
* ACSAdesign-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 26.
Propane/LP
Supply Tank
External
Regulator
Vent
Pointing
Down
Figure 14 - External Regulator With Vent
Pointing Down
12
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propane/LP gas or opening main gas valve
located on or near gas meter for natural gas
or using compressed air.
INSTALLATION
Continued
CHECKING GAS CONNECTIONS
3. Check all joints from gas meter for natural gas
or propane/LP supply tank for propane/LP gas,
toequipmentshutoffvalve(seeFigure17or18).
Apply a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
4. Correct all leaks at once.
WARNING:Testallgaspiping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 16).
2. For natural gas open main gas valve located
on or near gas meter. For propane/LPgas open
propane/LP supply tank valve.
3. Make sure control knob of heater is in the OFF
position.
4. Check all joints from equipment shutoff valve
to thermostat gas valve (see Figure 17 or 18).
Apply a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, page 14).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli-
ance, page 15).
WARNING: Never use an
open flame to check for a leak.
Applyanoncorrosiveleakdetec-
tion fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: For propane/LP
gas, make sure external regula-
tor has been installed between
propane/LP supply and heater.
See guidelines under Connect-
ing to Gas Supply, page 11.
8. Replace front panel.
Open
Equipment
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Shutoff Valve
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
Closed
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.
Figure 16 - Equipment Shutoff Valve
Thermostat
Gas Valve
Gas
Meter
2. Cap off open end of gas pipe where equipment
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
located on or near gas meter for natural gas
or using compressed air.
4. Check all joints of gas supply piping system.
Apply a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
Equipment
Shutoff Valve
Figure 17 - Checking Gas Joints for
Natural Gas
Propane/LP
Supply Tank
Thermostat
Gas Valve
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected fit-
tings for leaks.
TestPressuresEqualToorLessThan1/2PSIG
(3.5 kPa)
1. Close equipment shutoff valve (see Figure 16).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve for
Equipment
Shutoff Valve
Figure 18 - Checking Gas Joints for
Propane/LP Gas
107882-01M
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6. Turn control knob counterclockwise
to the PILOT position. Press in control
knob for five (5) seconds.
OPERATING HEATER
FOR YOUR SAFETY READ
BEFORE LIGHTING
7. With control knob pressed in, push down
and release ignitor button. This will light
pilot. The pilot is attached to the front of
burner. Note: You may be running this
heater for the first time after hooking up to
gas supply. If so, you may need to press in
control knob for 30 seconds or more. This
will allow air to bleed from the gas system.
If needed, keep pressing ignitorbutton until
pilot lights. If ignitor does not light pilot,
refer to Troubleshooting, page 18 or contact
a qualified service person orgas supplierfor
repairs. Until repairs are made, light pilot
with match. To light pilot with match, see
Manual Lighting Procedure, page 15.
WARNING: If you do not fol-
low these instructions exactly,
a fire or explosion may result
causing property damage, per-
sonal injury or loss of life.
A. This appliance has a pilot which must be
lighted by hand. When lighting the pilot,
follow these instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next
to the floor because some gas is heavier than
air and will settle on the floor.
8. Keep control knob pressed in for30 seconds
after lighting pilot.After 30 seconds, release
control knob.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not
use any phone in your building.
• If control knob does not pop up when
released, contact a qualified service person
or gas supplier for repairs.
• Immediately call your gas supplier from
a neighborʼs phone. Follow the gas
supplierʼs instructions.
Note: If pilot goes out, repeat steps 4 thru 7.
Thermostat models have a safety interlock
system. Wait one (1) minute before lighting
pilot again.
• If you cannot reach your gas supplier, call
the fire department.
C. Use only your hand to push in or turn the
gas control knob. Never use tools. If the
knob will not push in or turn by hand,
donʼt try to repair it, call a qualified service
technician. Force or attempted repair may
result in a fire or explosion.
9. Turn control knob counterclockwise
to desired heating level. The main burner
should light.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
D. Do not use this appliance if any part has
been under water. Immediately call a
qualified service technician to inspect the
appliance and to replace any part of the
control system and any gas control which
has been under water.
Ignitor
Control
Button
Knob
T
O
L
I
P
F
F
O
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information above.
Figure 19 - Control Knob In The OFF
Position
2. Make sure equipment shutoff valve is fully
open.
Ignitor
Electrode
3. Turn off any electric power to the appliance
if service is to be performed.
4. Turn control knob clockwise
OFF position.
to the
Pilot
Burner
5. Wait five minutes to clear out any gas. Then
smell for gas, including near the floor. If you
smell gas, STOP! Follow “B” in the safety
information above. If you donʼt smell gas,
go to the next step.
Thermocouple
Figure 20 - Pilot
14
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INSPECTING HEATER
OPERATING HEATER
Continued
Check pilot flame pattern and burner flame pat-
tern often.
TO TURN OFF GAS
TO APPLIANCE
PILOT FLAME PATTERN
Shutting Off Heater
1. Turn control knob clockwise
OFF position.
2. Turn off all electric power to the appliance
if service is to be performed.
Figure 21 shows a correct pilot flame pattern. Figure
22 shows an incorrect pilot flame pattern. The incor-
rect pilot flame is not touching the thermocouple.
This will cause the thermocouple to cool. When the
thermocouple cools, the heater will shut down.
to the
If pilot flame pattern is incorrect, as shown in
Figure 22
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise
to the
PILOT position.
•
turn heater off (see To Turn Off Gas to Ap-
pliance)
THERMOSTAT CONTROL
OPERATION
•
see Troubleshooting, page 18
Note: The pilot flame on natural gas units will
have a slight curve, but flame should be blue and
have no yellow or orange color.
The thermostatic control used on these models
differs from standard thermostats. Standard
thermostats simply turn on and off the burner.
The thermostat used on this heater senses the
room temperature. At times the room may
exceed the set temperature. If so, the burner
will shut off. The burner will cycle back on
when room temperature drops below the set
temperature. The control knob can be set to
any heat level between 1 and 5. This adjusts the
amount of gas flow to the burner that increases
or decreases the burner flame height.
Thermocouple
Blue Pilot Flame
Pilot Burner
Figure 21 - Correct Pilot Flame Pattern
Note: The thermostat sensing bulb measures
the temperature of air near the heater cabinet.
This may not always agree with room tem-
perature (depending on housing construction,
installation location, room size, open air tem-
peratures, etc.) Frequent use of your heater will
let you determine your own comfort levels.
Thermocouple
Yellow Pilot Flame
Pilot Burner
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 7, page 9).
Figure 22 - Incorrect Pilot Flame Pattern
2. Follow steps 1 through 7 under Lighting
Instructions, page 14.
3. With control knob pressed in, strike match.
Hold match to pilot until pilot lights.
4. Keep control knob pressed in for30 seconds
after lighting pilot.After 30 seconds, release
control knob. Now follow step 9, under
Lighting Instructions, page 14.
5. Replace front panel.
107882-01M
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INSPECTING HEATER
CLEANING AND
MAINTENANCE
Continued
BURNER FLAME PATTERN
WARNING: Turn off heater
and let cool before cleaning.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide.
CAUTION: You must keep
control areas, burner and circu-
latingairpassagewaysofheater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a
qualifiedserviceperson. Heater
may need more frequent clean-
ing due to excessive lint from
carpeting, beddingmaterial, pet
hair, etc.
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles enter the
heater and burn causing brief
patches of orange flame.
Figure 23 shows a correct burner flame pattern.
Figure 24 shows an incorrect burner flame pattern.
The incorrect burner flame pattern shows yellow
tipping of the flame. It also shows the flame higher
than 1/2 the glass panel height.
WARNING: Failure to keep
the primary air opening(s) of
theburner(s)cleanmayresultin
sooting and property damage.
If burner flame pattern is incorrect, as shown in
Figure 24
•
turn heater off (see To Turn Off Gas to Appli-
ance, page 15)
•
see Troubleshooting, page 18
ODS/PILOT AND BURNER
Use a vacuum cleaner, pressurized air or small,
soft bristled brush to clean.
Blue
Flame
1/2 Glass
Height
BURNER PILOT AIR INLET
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 and lint. Clean these air inlet holes prior to each
heating season. Blocked air holes will create soot.
We recommend that you clean the unit every three
months during operation and have heater inspected
yearly by a qualified service person.
Figure 23 - Correct Burner Flame Pattern
Yellow
Tipping
1/2 Glass
Height
Figure 24 - Incorrect Burner Flame Pattern
We also recommend that you keep the burner
tube and pilot assembly clean and free of dust and
dirt. To clean these parts we recommend using
compressed air no greater than 30 PSI. Your local
computer store, hardware store or home center
may carry compressed air in a can. You can use a
vacuum cleaner in the blow position. If using com-
pressed air in a can, please follow the directions on
the can. If you donʼt follow directions on the can,
you could damage the pilot assembly.
16
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CLEANING AND
SERVICE HINTS
MAINTENANCE
When Gas Pressure Is Too Low
Continued
•
•
•
•
pilot will not stay lit
burner will have delayed ignition
heater will not produce specified heat
propane/LP gas supply may be low
1. Shut off the unit, including the pilot. Allow
the unit to cool for at least thirty minutes.
2. Inspect burner, pilot for dust and dirt.
Youmayfeelyourgaspressureistoolow. Ifso, con-
tact your local natural or propane/LP gas supplier.
3. Blow air across the ports/slots and holes in the
burner.
4. Never insert objects into the pilot tube.
TECHNICAL SERVICE
Clean the pilot assembly also. A yellow tip on the
pilot flame indicates dust and dirt in the pilot as-
sembly. There is a small pilot air inlet about two
inches from where the pilot flame comes out of
the pilot assembly (see Figure 25). With the unit
off, lightly blow air through the air inlet. You may
blow through a drinking straw if compressed air
is not available.
You may have further questions about installation,
operation or troubleshooting. If so, contact DESA
Heating Productsʼ Technical Service Department
at 1-866-672-6040. When calling please have your
model and serial numbers of your heater ready.
You can also visit DESAHeating Productsʼtechni-
cal service web site at www.desatech.com.
Pilot Assembly
Pilot Air Inlet
Figure 25 - Pilot Air Inlet
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 cabinet to remove dust.
107882-01M
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TROUBLESHOOTING
WARNING:Turnoffandunplugheaterandletcoolbeforeservicing.
Only a qualified service person should service and repair heater.
CAUTION: Never use a wire, needle or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
OBSERVED PROBLEM POSSIBLE CAUSE
REMEDY
When ignitor button is pressed 1. Ignitor electrode positioned 1. Replace pilot assembly
in, there is no spark at ODS/
pilot
wrong
2. Ignitor electrode broken
2. Replace pilot assembly
3. Ignitor electrode not con- 3. Reconnect ignitor cable
nected to ignitor cable
4. Ignitor cable pinched or wet
4. Free ignitor cable if pinched
by any metal or tubing. Keep
ignitor cable dry
5. Broken ignitor cable
6. Bad ignitor
5. Replace ignitor cable
6. Replace ignitor
7. Piezo ignitor nut is loose 7. Tighten nut holding piezo
(piezo ignition models only)
ignitor. Nut is located inside
heater cabinet at top
8. Battery not installed, battery 8. Install new alkaline battery
power low or battery not
installed correctly (electronic
ignition models only)
in electronic ignitor. Verify
battery is installed correctly
When ignitor button is pressed 1. Gas supply turned off or equip- 1. Turn on gas supply or open
in, there is a spark at ODS/Pilot
but no ignition
ment shutoff valve closed
2. Control knob is not in pilot 2. Turn control knob to pilot
position position
3. Control knob not fully pressed 3. Turn to PILOT position. Fully
equipment shutoff valve
in while pressing ignitor button
press in control knob while
pressing ignitor button
4. Air in gas lines when installed 4. Continue holding down con-
trol knob. Repeat igniting op-
eration until air is removed
5. Depleted gas supply (propane/ 5. Contact local propane/LP gas
LP gas)
6. ODS/pilot is clogged
company
6. Clean ODS/pilot (see Cleaning
and Maintenance, page 16) or
replace ODS/pilot assembly
7. Gas regulator setting is not 7. Replace gas regulator
correct
18
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TROUBLESHOOTING
Continued
OBSERVED PROBLEM POSSIBLE CAUSE
REMEDY
ODS/pilot lights but flame 1. Control knob not fully pressed in 1. Press in control knob fully
goes out when control knob is 2. Control knob not pressed in 2. AfterODS/pilotlights,keepcon-
released
long enough
3. Equipment shutoff valve not 3. Fully open equipment shutoff
fully open valve
4. Thermocouple connection 4. Hand tighten until snug, then
loose at control valve tighten 1/4 turn more
5. Pilot flame not touching ther- 5. A) Contact local natural or
trol knob pressed in 30 seconds
mocouple, which allows ther-
mocouple to cool, causing
pilot flame to go out. This
problem could be caused by
one or both of the following:
A) Low gas pressure
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 16) or replace ODS/pilot
assembly
B) Dirty or partially clogged
ODS/pilot
6. Thermocouple damaged 6. Replace pilot assembly
7. Control valve damaged 7. Replace control valve
8. Safety interlock system has 8. Wait one minute for safety in-
been triggered
terlock system to reset. Repeat
ignition operation
Burner(s) does not light after 1. Burner orifice(s) is clogged
ODS/pilot is lit
1. Cleanburnerorifice(s)(seeClean-
ing and Maintenance, page 16)
or replace burner orifice(s)
2. Contact local natural or pro-
pane/LP gas company
2. Inlet gas pressure is too low
Delayed ignition of burner(s)
1. Manifold pressure is too low 1. Contact local natural or pro-
pane/LP gas company
2. Burner orifice(s) is clogged
2. Cleanburnerorifice(s)(seeClean-
ing and Maintenance, page 16)
or replace burner orifice(s)
Burner backfiring during com- 1. Burner orifice(s) is clogged or 1. Cleanburnerorifice(s)(seeClean-
bustion
damaged
ing and Maintenance, page 16)
or replace burner orifice(s)
2. Replace burner
2. Burner damaged
3. Gas regulator defective
3. Replace gas regulator
107882-01M
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TROUBLESHOOTING
Continued
OBSERVED PROBLEM POSSIBLE CAUSE
REMEDY
Yellow flame during burner
combustion
1. Not enough air
1. Check burner for dirt and
debris. If found, clean burner
(see Cleaning and Mainte-
nance, page 16)
2. Gas regulator defective
3. Clogged or dirty burner
2. Replace gas regulator
3. Clean burner (see Cleaning
and Maintenance, page 16)
Slight smoke or odor during 1. Residues from manufacturing 1. Problem will stop after a few
initial operation processes hours of operation
Heaterproducesaclicking/tick- 1. Metal expanding while heating 1. Thisiscommonwithmostheat-
ing noise just after burner is lit
or shut off
or contracting while cooling
ers.Ifnoiseisexcessive,contact
qualified service person
Heater produces a whistling 1. Turning control knob to the 1. Turn control knob to the low-
noise when burner is lit
highest position when burner
is cold
2. Air in gas line
est position and let warm up
for a minute
2. Operate burner until air is
removed from line. Have gas
line checked by local natural
or propane/LP gas company
3. Air passageways on heater 3. Observe minimum installation
blocked clearances (see Figure 4, page 8)
4. Dirty or partially clogged 4. Clean burner (see Cleaning
burner orifice
and Maintenance, page 16)
or replace burner orifice
White powder residue forming 1. When heated, vapors from 1. Turn heater off when using
withinburnerboxoronadjacent
walls or furniture
furniture polish, wax, carpet
cleaner, etc., may turn into
white powder residue
furniture polish, wax, carpet
cleaners or similar products
Heater shuts off in use (ODS 1. Not enough fresh air is avail- 1. Open window and/or door for
operates)
able
2. Low line pressure
ventilation
2. Contact local natural or pro-
pane/LP gas company
3. ODS/pilot is partially 3. Clean ODS/pilot (see Cleaning
clogged
and Maintenance, page 16)
20
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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.
• Immediately call your gas supplier from a neighbor’s phone. Fol-
low the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
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., create fumes.
These fumes may mix with combustion air and create odors.
OBSERVED PROBLEM POSSIBLE CAUSE
REMEDY
Heater produces unwanted 1. Heater burning vapors from 1. Ventilate room. Stop using
odors
paint, hair spray, glues, etc.
See IMPORTANT statement
above
odor causing products while
heater is running
2. Low fuel supply (propane/LP 2. Refill supply tank
gas)
3. Gas leak. See Warning 3. Locate and correct all leaks
statement at top of page
(see Checking Gas Connec-
tions, page 13)
Gas odor even when control 1. Gas leak. See Warning 1. Locate and correct all leaks
knob is in OFF position
statement at top of page
(see Checking Gas Connec-
tions, page 13)
2. Replace control valve
2. Control valve defective
Gas odor during combustion
1. Foreign matter between con- 1. Take apart gas tubing and
trol valve and burner remove foreign matter
2. Gas leak. See Warning 2. Locate and correct all leaks
statement at top of page
(see Checking Gas Connec-
tions, page 13)
Moisture/condensation noticed 1. Not enough combustion/ven- 1. Refer to Air for Combustion
on windows
tilation air
and Ventilation requirements
(page 5)
107882-01M
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CBT20PT
• Propane/LP Gas
SPECIFICATIONS
CBN20T
• Natural Gas
• 10,000/20,000 Btu/Hr (Variable)
• Electronic Ignition
• 10,000/20,000 Btu/Hr (Variable)
• Piezo Ignition
• Pressure Regulator Setting - 8" W.C.
• Inlet Gas Pressure* (in. of water)
Maximum - 14" - Minimum - 11"
• Pressure Regulator Setting - 3" W.C.
• Inlet Gas Pressure* (in. of water)
Maximum - 10.5" - Minimum - 4"
• Heater Dimensions H x W x D
26.25" x 18.25" x 7" (66.7 x 46.4 x 17.8 cm)
• Heater Dimensions H x W x D
26.25" x 18.25" x 7" (66.7 x 46.4 x 17.8 cm)
• Carton Dimensions H x W x D
28.75" x 21" x 10.38" (73 x 53.3 x 26.4 cm)
• Carton Dimensions H x W x D
28.5" x 21" x 10.25" (72.4 x 53.3 x 26 cm)
• Average Heater Weight - 21.9 lb (9.9 kg)
• Average Shipping Weight - 25.4 lb (11.5 kg)
• Average Heater Weight - 23.4 lb (10.6 kg)
• Average Shipping Weight - 27 lb (12.2 kg)
CBN30T
• Natural Gas
CBP20T
• Propane/LP Gas
• 15,000/30,000 Btu/Hr (Variable)
• Piezo Ignition
• 10,000/20,000 Btu/Hr (Variable)
• Piezo Ignition
• Pressure Regulator Setting - 3" W.C.
• Inlet Gas Pressure* (in. of water)
Maximum - 10.5" - Minimum - 4"
• Pressure Regulator Setting - 8" W.C.
• Inlet Gas Pressure* (in. of water)
Maximum - 14" - Minimum - 11"
• Heater Dimensions H x W x D
26.25" x 25.75" x 7" (66.7 x 65.4 x 17.8 cm)
• Heater Dimensions H x W x D
26.25" x 18.25" x 7" (66.7 x 46.4 x 17.8 cm)
• Carton Dimensions H x W x D
28.75" x 28.5" x 10.25" (73 x 72.3 x 26 cm)
• Carton Dimensions H x W x D
28.5" x 21" x 10.25" (72.4 x 53.3 x 26 cm)
• Average Heater Weight - 27.3 lb (12.4 kg)
• Average Shipping Weight - 31.5 lb (14.3 kg)
• Average Heater Weight - 23.4 lb (10.6 kg)
• Average Shipping Weight - 27 lb (12.2 kg)
CBP30T
• Propane/LP Gas
CBT20NT
• Natural Gas
• 15,000/30,000 Btu/Hr (Variable)
• Piezo Ignition
• 10,000/20,000 Btu/Hr (Variable)
• Electronic Ignition
• Pressure Regulator Setting - 8" W.C.
• Inlet Gas Pressure* (in. of water)
Maximum - 14" - Minimum - 11"
• Pressure Regulator Setting - 3" W.C.
• Inlet Gas Pressure* (in. of water)
Maximum - 10.5" - Minimum - 4"
• Heater Dimensions H x W x D
26.25" x 25.75" x 7" (66.7 x 65.4 x 17.8 cm)
• Heater Dimensions H x W x D
26.25" x 18.25" x 7" (66.7 x 46.4 x 17.8 cm)
• Carton Dimensions H x W x D
28.75" x 28.5" x 10.25" (73 x 72.3 x 26 cm)
• Carton Dimensions H x W x D
28.75" x 21" x 10.38" (73 x 53.3 x 26.4 cm)
• Average Heater Weight - 27.3 lb (12.4 kg)
• Average Shipping Weight - 31.5 lb (14.3 kg)
• Average Heater Weight - 21.9 lb (9.9 kg)
• Average Shipping Weight - 25.4 lb (11.5 kg)
Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).
* For purposes of input adjustment.
22
107882-01M
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SPECIFICATIONS
REPLACEMENT PARTS
Continued
Note: Use only original replacement parts. This
will protect your warranty coverage for parts
replaced under warranty.
CBT30NT
• Natural Gas
PARTS UNDER WARRANTY
• 15,000/30,000 Btu/Hr (Variable)
• Electronic Ignition
Contact authorized dealers of this product. If
they canʼt supply original replacement part(s),
call DESA Heating Productsʼ Technical Service
Department at 1-866-672-6040.
• Pressure Regulator Setting - 3" W.C.
• Inlet Gas Pressure* (in. of water)
Maximum - 10.5" - Minimum - 4"
When calling DESA Heating Products, have
ready
• Heater Dimensions H x W x D
26.25" x 25.75" x 7" (66.7 x 65.4 x 17.8 cm)
•
•
•
•
•
•
your name
your address
• Carton Dimensions H x W x D
28.75" x 28.25" x 10.38" (73 x 71.8 x 26 cm)
model and serial numbers of your heater
how heater was malfunctioning
type of gas used (propane/LP or natural gas)
purchase date
• Average Heater Weight - 27.3 lb (12.4 kg)
• Average Shipping Weight - 31.5 lb (14.3 kg)
CBT30PT
• Propane/LP Gas
Usually, we will ask you to return the part to the
factory.
• 15,000/30,000 Btu/Hr (Variable)
• Electronic Ignition
PARTS NOT UNDER WARRANTY
• Pressure Regulator Setting - 8" W.C.
Contact authorized dealers of this product. If they
canʼt supply original replacement part(s), either
contact your nearest Parts Central (see page 27)
or call DESAHeating Products at 1-866-672-6040
for referral information.
• Inlet Gas Pressure* (in. of water)
Maximum - 14" - Minimum - 11"
• Heater Dimensions H x W x D
26.25" x 25.75" x 7" (66.7 x 65.4 x 17.8 cm)
• Carton Dimensions H x W x D
28.75" x 28.25" x 10.38" (73 x 71.8 x 26 cm)
When calling DESA Heating Products, have
ready
• Average Heater Weight - 27.3 lb (12.4 kg)
• Average Shipping Weight - 31.5 lb (14.3 kg)
•
•
model number of your heater
the replacement part number
Note: Dimensions listed are outer most points on
the heater (includes control knobs and grill).
* For purposes of input adjustment.
SERVICE PUBLICATIONS
Youcanpurchaseaservicemanualfromtheaddress
listed on the back page of this manual. Send a check
for $5.00 payable to DESA Heating Products.
107882-01M
23
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ILLUSTRATED PARTS BREAKDOWN
MODELS
CBN20T, CBP20T, CBN30T, CBP30T, CBT20NT, CBT20PT, CBT30NT AND
CBT30PT
7
1
20
4
1
15
9
17
12
21
13
11
10
18
9
14
19
8
16
5
3
6
2
Install battery
according to
this illustration
(Actual ignitor
may vary)
AAA
Battery
Negative
UP
24
107882-01M
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PARTS LIST
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 23 of this manual.
KEY
NO. PART NO.
DESCRIPTION
Electronic Ignitor
QTY
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
111435-01
•
•
•
•
•
•
097159-04 Piezo Ignitor
107954-03CV Front Panel
107954-01 Front Panel
107955-01 Front Panel
107955-03CV Front Panel
107879-01 Grill Guard
107879-02 Grill Guard
098522-28 T-stat Gas Valve
098522-11 T-stat Gas Valve
098522-12 T-stat Gas Valve
098522-13 T-stat Gas Valve
107677-01 Glass Retainer
098260-12 Glass
•
•
•
•
•
•
2
•
•
•
•
•
•
•
•
3
4
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
5
6
•
•
•
•
•
•
•
•
098260-13 Glass
•
•
•
•
•
•
•
•
7
8
**
Cabinet
•
•
•
•
•
•
•
•
107894-08 Deflector Assembly
107894-09 Deflector Assembly
098271-11 Ignitor Cable
•
•
•
•
•
•
9
•
•
•
098271-09 Ignitor Cable
•
•
•
•
•
•
•
•
•
•
10 098249-01 ODS Pilot Nut
11 110803-01 ODS/Pilot Assembly
110803-02 ODS/Pilot Assembly
12 103446-02 Burner
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
103447-06 Burner
•
•
•
•
•
•
•
•
13 099387-03 3/16" Pilot Tubing
14 103845-05 Injector
103845-06 Injector
103845-07 Injector
103845-08 Injector
15 099066-02 Mounting Bracket
16 099415-17 Gas Regulator
099415-18 Gas Regulator
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
17 NJF 8C
Hex Nut
•
•
•
•
•
•
•
•
•
•
•
•
•
•
18 103255-02 3/8" Outlet Tubing
19 103256-02 3/8" Inlet Tubing
20 109303-03 Baffle
109303-04 Baffle
21 103408-02 Burner Bracket
•
•
•
•
•
•
•
•
•
•
•
•
•
•
PARTS AVAILABLE — NOT SHOWN
107888-01 Control Position Label
107888-03 Control Position Label
116354-02 Control Position Label
110186-01 Thermocouple Kit
100642-03 Hardware Assembly
105345-01 Cable Tie
116360-01 Lighting/Warning Tag (English)
116360-02 Lighting/Warning Tag (Spanish)
102394-02 Valve Mounting Bracket
109121-01 Pilot Shield
•
•
1
1
1
1
1
1
1
1
1
1
1
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
109121-02 Pilot Shield
•
** Not a field replaceable part.
107882-01M
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ACCESSORIES
Purchase these heater accessories from your local
dealer. If they can not supply these accessories, either
contact your nearest Parts Central (see page 27) or
call DESA Heating Products at 1-866-672-6040 for
referralinformation.Youcanalsowritetotheaddress
listed on the back page of this manual.
FLOOR MOUNTING KIT - GA4550
For all models. For locating heater on the floor,
away from a wall. Complete installation and op-
erating instructions included.
EQUIPMENT SHUTOFF VALVE
GA5010
For all models. Equipment shutoff valve with
ELECTRONIC IGNITOR KIT - GA435
Not Shown
For all piezo ignitor models. Provides easier
1/8" NPT tap.
lighting of the pilot.
FAN KITS - GA3250T
For all models. Provides better heat distribution.
Makes heater more efficient. Complete installation
and operating instructions included.
Thermostatically-controlled, blower turns itself on
and off as required.
26
107882-01M
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PARTS CENTRAL
These Parts Centrals are privately owned businesses. They have agreed to support our customerʼs needs
by providing original replacement parts and accessories.
Tool & Equipment Co.
5 Manila Ave
Washer Equipment Co.
1715 Main Street
Hamden, CT 06514-0322
1-800-397-7553
203-248-7553
Kansas City, MO 64108-2195
KS, MO, AR
816-842-3911
Portable Heater Parts
342 N. County Rd. 400 East
Valparaiso, IN 46383-9704
219-462-7441
East Coast Energy
707 Broadway
W. Long Branch, NJ 07764-1501
732-870-8809
1-800-755-8809
1-888-619-7060
21st Century
FBD
2950 Fretz Valley
Perkasie, PA 18944-4034
215-795-0400
1349 Adams Street
Bowling Green, KY 42103-3414
270-846-1199
800-325-4828
1-800-654-8534
Fax: 1-800-846-0090
Laporte’s Parts & Service
2444 N. 5th Street
Hartsville, SC 29550-7704
843-332-0191
Parts Department
Master Parts Dist.
1251 Mound Ave. NW
Grand Rapids, MI 49504-2672
616-791-0505
1-800-446-1446
Cans Unlimited
P.O. Box 645
Taylor, SC 29687-0013
803-879-3009
1-800-845-5301
107882-01M
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WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our
standard written warranty. We make no other warranty, expressed or implied.
LIMITED WARRANTIES FOR NEW AND FACTORY
RECONDITIONED PRODUCTS
New Products: DESAHeating Products warrants this heater and any parts thereof, to be free of defects in materials
and workmanship for two (2) years from the date of first purchase, when operated and maintained in accordance
with the manufacturer's instructions. These warranties are extended only to the original retail purchaser, when
proof of purchase is provided.
Factory Reconditioned Heaters: DESAHeating Products warrants this factory reconditioned heater and any parts
thereof, to be free of defects in materials and workmanship for thirty (30) days from the date of first purchase,
when operated and maintained in accordance with the manufacturer's instructions. These warranties are extended
only to the original retail purchaser, when proof of purchase is provided.
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required
to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Heating
ProductsAuthorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product
and/or DESAHeating Products who will provide original factory replacement parts. Failure to use original factory
replacement parts voids this warranty. The heater MUST be installed by a qualified installer in accordance with
all local codes and instructions furnished with the unit.
This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts
that fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by
improper installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related to
repairing a defective heater will be the responsibility of the owner.
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE
OF THE PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED
WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUD-
ING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO
(2) YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA HEATING
PRODUCTSʼ LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND
DESA HEATING PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER
INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of
incidental or consequential damages, so the above limitation on implied warranties or exclusion or limitation on
damages may not apply to you.
This warranty gives you specific legal rights and you may also have other rights that vary from state to state.
For information about this warranty write:
P.O. Box 90004
Bowling Green, KY 42102-9004
107882-01
Rev. M
05/05
Patent Pending
107882 01
NOT A UPC
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