Desa CBN20TK Electric Heater User Manual

UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER
SAFETY INFORMATION AND INSTALLATION MANUAL
CBN20, CBP20, SBN20, SBP20, CBN20T, CBP20T,
CBN30T, CBP30T, CBT20NT, CBT20PT, CBT30NT, CBT30PT,
CBN20TK, CBP20TK
WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a qualified installer, service agency, or the gas supplier.
Save this manual for future reference.
For more information, visit www.desatech.com
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual for correct installation
and operational procedures. For assistance or additional information consult a qualified installer, service
agency, or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses
air (oxygen) from the room in which it is installed. Provisions for adequate combustion and ventilation air must
be provided. Refer to Air for Combustion and Ventilation
section on page 5 of this manual.
This appliance may be installed in an aftermarket,* permanently located, manufactured (mobile) home, where
not prohibited by local codes.
This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
TABLE OF CONTENTS
Safety Information ............................................... 3
Local Codes ........................................................ 4
Unpacking ........................................................... 4
Product Information ............................................. 4
Product Features ................................................. 4
Air For Combustion and Ventilation ..................... 5
Installation ........................................................... 7
Operating Heater ............................................... 14
Inspecting Heater .............................................. 16
Cleaning and Maintenance ................................ 17
2
Specifications .................................................... 18
Troubleshooting ................................................. 19
Service Hints ..................................................... 22
Technical Service .............................................. 22
Service Publications .......................................... 22
Replacement Parts ............................................ 22
Accessories ....................................................... 23
Illustrated Parts Breakdown and Parts List ....... 24
Parts Centrals .................................................... 30
Warranty Information ...........................Back Cover
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107882-01K
SAFETY INFORMATION
IMPORTANT: Read this owner’s
manual carefully and completely
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.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning resemble the flu, with
headaches, 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 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 are 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 a
blower insert, heat exchanger
insert or other accessory not approved for use with this heater.
107882-01K
Due to high temperatures, the
appliance should be located out
of traffic and away from furniture
and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
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 shutdown. Allow surface to cool
before touching.
Carefully supervise young children when they are in the same
room with heater.
Make sure grill guard is in place
before running heater.
Keep the appliance area clear
and free from combustible materials, gasoline and other flammable vapors and liquids.
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 (propane/LP models only).
3. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do not use
any phone in your building
• immediately call your gas supplier from a
neighborʼs phone. Follow the gas supplierʼs
instructions
• if you cannot reach your gas supplier, call
the fire department
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3
SAFETY INFORMATION
UNPACKING
Continued
1. Remove heater from carton.
2. Remove all protective packaging applied to
heater for shipment.
3. Check heater for any shipping damage. If
heater is damaged, promptly return to dealer
where you bought heater.
4. This heater shall not be installed in a bedroom
or bathroom.
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 4.
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.
8. Do not run heater
• where flammable liquids or vapors are used
or stored
• under dusty conditions
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.
10. Turn off and let cool before servicing. Only
a qualified service person should service and
repair heater.
11. Operating heater above elevations of 4,500
feet could cause pilot outage.
12. To prevent performance problems, do not use
propane/LP fuel tank of less than 100 lbs.
capacity (propane/LP models only).
13. Provide adequate clearances around air
openings.
LOCAL CODES
Install and use heater with care. Follow all local codes. In the absence of local codes, use the
latest edition of National Fuel Gas Code, ANSI
Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
4
PRODUCT INFORMATION
Control Knob & Ignitor
Button (not seen from
this view)
Heater
Cabinet
Front Panel
Glass Panel
Grill
Guard
Figure 1 - Vent-Free Gas Heater
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.
IGNITION SYSTEM
This heater has either a piezo ignitor or electronic
ignitor to light heater fuel supply.
THERMOSTATIC HEAT CONTROL
Thermostat models have a thermostat sensing
bulb and a control valve. This results in the greatest heater comfort. This can also result in lower
gas bills.
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107882-01K
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a confined
space or unusually tight construction unless provisions are
provided for adequate combustion and ventilation air. Read the
following instructions to insure
proper fresh air for this and
other fuel-burning appliances
in your home.
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.
While it is good to make your home energy efficient, your home needs to breathe. Fresh air must
enter your home. All fuel-burning appliances need
fresh air for proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and fuel
burning appliances draw air from the house to
operate. You must provide adequate fresh air for
these appliances. This will insure proper venting
of vented fuel-burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Section 5.3,
Air for Combustion and Ventilation.
All spaces in homes fall into one of the three following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 5 through 7 will help
you classify your space and provide adequate
ventilation.
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 (6x10-11 kg per pa-sec-m2) or
less with openings gasketed or sealed
and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to
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.
If your home meets all of the three criteria
above, you must provide additional fresh
air. See Ventilation Air From Outdoors,
page 7.
If your home does not meet all of the three
criteria above, proceed to Determining FreshAir Flow For Heater Location, page 6.
Confined and Unconfined Space
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 communicating directly with the space in which the
appliances are installed*, through openings not
furnished with doors, are considered a part of the
unconfined space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation grills
between them.
Unusually Tight Construction
The air that leaks around doors and windows
may provide enough fresh air for combustion and
ventilation. However, in buildings of unusually
tight construction, you must provide additional
fresh air.
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5
AIR FOR COMBUSTION
AND VENTILATION
Continued
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 confined or unconfined space.
Space: Includes the room in which you will install
heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.
1. Determine the volume of the space (length x
width x height).
Length x Width x Height =__________cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2560 cu. ft.
(volume of space)
If additional ventilation to adjoining room is
supplied with grills or openings, add the volume
of these rooms to the total volume of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
_______ (volume of space) x 20 = (Maximum
Btu/Hr the space can support)
Example: 2560 cu. ft. (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.
Vent-free heater
______________ Btu/Hr
Gas water heater* ______________ Btu/Hr
Gas furnace
______________ Btu/Hr
Vented gas heater ______________ Btu/Hr
Gas fireplace logs ______________ Btu/Hr
Other gas appliances* + __________ Btu/Hr
Total
= __________ Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors
and vents to the outdoors.
Example:
40,000
Gas water heater ______________
Btu/Hr
20,000
Vent-free heater + _____________
Btu/Hr
60,000
Total
= _____________
Btu/Hr
6
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)
The space in the above example is a confined space
because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. 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 room or add
ventilation grills between rooms. See Ventilation
Air From Inside Building, page 7.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.
C. Install a lower Btu/Hr heater, if lower Btu/Hr size
makes room unconfined.
If the actual Btu/Hr used is less than the maximum
Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air
ventilation.
WARNING: If the area in
which the heater may be operated is smaller than that defined
as an unconfined space or if the
building is of unusually tight
construction, provide adequate
combustion and ventilation air
by one of the methods described
in the National Fuel Gas Code,
ANSI Z223.1/NFPA 54 Section 5.3
or applicable local codes.
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107882-01K
AIR FOR COMBUSTION
AND VENTILATION
Continued
Outlet
Air
Ventilated
Attic
Outlet
Air
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining
unconfined space, you must provide two permanent openings: one within 12” of the ceiling and
one within 12” of the floor on the wall connecting
the two spaces (see options 1 and 2, Figure 2). You
can also remove door into adjoining room (see
option 3, Figure 2). 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.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills or
ducts. You must provide two permanent openings:
one within 12” of the ceiling and one within 12”
of the floor. Connect these items directly to the
outdoors or spaces open to the outdoors. These
spaces include attics and crawl spaces. Follow the
National Fuel Gas Code, ANSI Z223.1/NFPA 54,
Section 5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet
or outlet air into attic if attic has a thermostatcontrolled power vent. Heated air entering the attic
will activate the power vent.
12"
To Attic
To
Crawl
Space
Inlet
Air
Inlet Air
Ventilated
Crawl Space
Figure 3 - Ventilation Air from Outdoors
INSTALLATION
NOTICE: This heater is intended
for use as supplemental heat.
Use this heater along with your
primary heating system. Do not
install this heater as your primary heat source. If you have a
central heating system, you may
run system’s circulating blower
while using heater. This will help
circulate the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
WARNING: A qualified service person must install heater.
Follow all local codes.
CHECK GAS TYPE
Ventilation
Grills
into Adjoining
Room,
Option 1
Ventilation Grills
Into Adjoining Room,
Option 2
Or
Remove
Door into
Adjoining
Room,
Option 3
Use only the correct type of gas (natural or propane/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.
WARNING: This appliance
is equipped for (natural or propane/LP) gas. Field conversion
is not permitted.
12"
Figure 2 - Ventilation Air from Inside
Building
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7
INSTALLATION
Continued
INSTALLATION ITEMS
Before installing heater, make sure you have the
items listed below.
• 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
• test gauge connection*
* A CSA design-certified equipment shutoff valve
with 1/8” NPT tap is an acceptable alternative to
test gauge connection. The optional CSA designcertified equipment shutoff valve can be purchased
from your dealer. See Accessories, page 23.
LOCATING HEATER
WARNING: Maintain the
minimum clearances shown
in Figure 4. If you can, provide
greater clearances from floor,
ceiling, and joining wall.
You can locate heater on the floor, away from a
wall. 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 23). Determine
which method is best for your application.
CEILING
36"
Minimum
6"
Minimum
From
Sides Of
Heater
Left
Side
Right
Side
FLOOR
2" Minimum To
Top Surface
Of Carpeting,
Tile Or Other
Combustible
Material
Figure 4 - Mounting Clearances As
Viewed From Front of Heater
8
WARNING: Never install the
heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36 inches
from the front, top, or sides of
the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
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
coverings or operating heater
where impurities (such as, but
not limited to, tobacco smoke,
aromatic candles, cleaning fluids, oil or kerosene lamps, etc.) in
the air exist, may discolor walls
or cause odors.
IMPORTANT: Vent-free heaters add moisture to
the air. Although this is beneficial, installing heater
in rooms without enough ventilation air may cause
mildew to form from too much moisture. See Air
for Combustion and Ventilation, pages 5 through
7. If high humidity is experienced, a dehumidifier may be used to help lower the water vapor
content in the air.
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must be
at least 18 inches 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
An optional fan kit is available from your dealer.
See Accessories, page 23. If planning to use fan,
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107882-01K
INSTALLATION
Continued
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.
Thermostat
Sensing Bulb
Clamp
Figure 5 - Attaching Thermostat Sensing
Bulb
INSTALLING HEATER TO WALL
Mounting Bracket
Locate mounting bracket in heater carton. Remove
mounting bracket from heater carton.
Figure 6 - Mounting Bracket
Removing Front Panel Of Heater
1. Remove the four painted screws, two on each
side of front panel.
2. Pull bottom of front panel forward, then out.
3. Remove any remaining packaging materials.
107882-01K
Figure 7 - Removing Front Panel Of
Heater
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
inches 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. Insert mounting screws through
mounting bracket and into wall studs.
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.
Marking Screw Locations
1. Tape mounting bracket to wall where heater
will be located. Make sure mounting bracket
is level.
WARNING: Maintain minimum clearances shown in Figure 8, page 9. If you can, provide
greater clearances from floor
and joining wall.
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9
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.
3. Remove tape and mounting bracket from
Adjoining Wall
12"
Min.
14"
Only Insert Mounting
Screws Through Last
Hole On Each End
18 3/4"
Min.
Floor
30,000 Btu/hr Models
8"
Min.
18 3/4"
Min.
14"
Only Insert Mounting
Screws Through Last
Hole On Each End
Attaching To Wall Anchor Method
For attaching mounting bracket to hollow 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" deep.
2. Fold wall anchor as shown in Figure 9.
3. Insert
8" wall anchor
14"(wings first) into hole. Tap
Min. flush to wall.
anchor
4. For thin walls (1/2" or less), insert red key
into wall anchor. Push red key to “pop” open
Only
Insert
Mounting
anchor
wings.
IMPORTANT:
Do3/4not
18
" hammer
Screws Through Last
Min.
key! For
thick
Hole
On walls
Each (over
End 1/2" 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.
Floor
6. Insert mounting screws through bracket and
into wall anchors.
7. Tighten screws until mounting bracket is
firmly fastened to wall.
Adjoining Wall
Continued
Adjoining Wall
g
st
d
INSTALLATION
18 3/4"
Min.
Figure 9 Folding Anchor
Floor
20,000 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 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.
Figure 10 - Popping
Open Anchor Wings
For Thin Walls
Placing Heater On Mounting Bracket
1. Locate two horizontal slots on back panel of
heater.
2. Place heater onto mounting bracket. Slide
horizontal slots onto stand-out tabs on mounting bracket.
Horizontal Slots
Stand-Out Tab
Mounting Bracket
(attached to wall)
Figure 11 - Mounting Heater Onto
Mounting Bracket
10
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107882-01K
INSTALLATION
MOUNTING HEATER TO FLOOR
(OPTIONAL)
Continued
Installing Bottom Mounting Screws
1. Locate two bottom mounting holes. These
holes are near bottom on back panel of heater
(see Figure 12).
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, page 10.
If installing bottom mounting screw into
wall stud, drill holes at marked locations
using 9/64” drill bit.
5. Replace heater onto mounting bracket.
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.
8. Tighten both screws 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
through 13).
Mounting Base Feet to Heater
1. Lay heater cabinet on its back on a table
with the heater bottom overhanging the table
edge.
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
Panel of Heater, page 9).
2. Position heater with base feet in desired location. Mark holes for drilling. Remove heater
with base.
3. For carpeted floors, make a small cut with a
sharp knife at marked locations prior to drilling. If mounting base to a wood floor, drill 1/8
inch diameter hole, 3/4 inch deep. (Do not use
anchors in wood floors).
If mounting base to a concrete floor, drill
with 1/4 inch diameter concrete drill bit, 13/8
inches into floor. Insert anchors completely
into holes.
4. Reposition heater with base feet over holes.
Secure base to floor with wood screws. See
Wood
Screw
Front View
Heater
Wall
Base Foot
Spacer
Side View
Sheet Metal Screw
Figure 13 - Installing Base Feet
Figure 12 - Installing Bottom Mounting
Screws
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11
INSTALLATION
Propane/LP
Supply Tank
Continued
External
Regulator
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualified service person must connect heater
to gas supply. Follow all local
codes.
WARNING: For natural
gas, never connect heater to
private (non-utility) gas wells.
This gas is commonly known
as wellhead gas.
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 regulator damage could occur.
CAUTION: For propane/LP
gas, never connect heater directly to the propane/LP supply.
This heater requires an external
regulator (not supplied). Install
the external regulator between the
heater and propane/LP supply.
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 pressure, heater regulator damage could occur. Install
the external regulator with the vent pointing down
as shown in Figure 14. Pointing the vent down
protects it from freezing rain or sleet.
12
Vent
Pointing
Down
Figure 14 - External Regulator With
Vent Pointing Down
Typical Inlet Pipe Diameters
20,000 Btu/Hr Models - 3/8" or greater
30,000 Btu/Hr Models - 1/2" or greater
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 15,
page 13).
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.
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.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Install sediment trap in supply line as shown in
Figure 15, page 13. 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.
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.
www.desatech.com
107882-01K
INSTALLATION
Continued
Note: Burner bracket
not shown for clarity
Sediment Trap
Test Gauge Connection*
Pressure
Regulator
Heater
Cabinet
3/8" NPT
Pipe Nipple
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Tee
Joint
Pipe
Nipple
Cap
Ground Joint
Union
Equipment
Shutoff
Valve *
3"
Minimum
Natural Gas
From Gas Meter
(4" W.C. to 10.5"
W.C. Pressure)
Propane/LP
From External
Regulator
(11" W.C. to 14"
W.C. Pressure)
Figure 15 - Gas 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 23.
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak detection fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: For propane/LP
gas, make sure external regulator has been installed between
propane/LP supply and heater.
See guidelines under Connecting to Gas Supply, page 12.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment
shutoff valve from gas supply piping system.
Pressures in excess of 1/2 psig will damage
heater regulator.
2. Cap off open end of gas pipe where 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.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected fittings for leaks.
Test Pressures Equal To or Less Than 1/2
PSIG (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
propane/LP gas or opening main gas valve
located on or near gas meter for natural gas,
or using compressed air.
3. Check all joints from gas meter for natural
gas (see Figure 17, page 14) or propane/LP
supply tank for propane/LP gas, to equipment
shutoff valve (see Figure 18, page 14). Apply a
noncorrosive leak detection fluid to all joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Open
Equipment
Shutoff Valve
Closed
Figure 16 - Equipment Shutoff Valve
107882-01K
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13
INSTALLATION
OPERATING HEATER
Continued
FOR YOUR SAFETY
READ BEFORE LIGHTING
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 16,
page 13).
2. For natural gas open main gas valve located
on or near gas meter. For propane/LP gas 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 Appliance, page 15).
8. Replace front panel.
Thermostat Gas Valve
Gas
Meter
Equipment
Shutoff Valve
Figure 17 - Checking Gas Joints for
Natural Gas
Thermostat Gas Valve
Propane/LP
Supply Tank
Equipment
Shutoff Valve
Figure 18 - Checking Gas Joints for
Propane/LP Gas
14
WARNING: If you do not follow these instructions exactly,
a fire or explosion may result
causing property damage, personal 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.
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.
• Immediately call your gas supplier from
a neighborʼs phone. Follow the gas
supplierʼs instructions.
• 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 or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has
been under water. Immediately 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.
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information
above.
2. Make sure equipment shutoff valve is fully
open.
3. Turn control knob clockwise
to the
OFF position.
4. Wait five (5) 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.
www.desatech.com
107882-01K
OPERATING HEATER
Thermocouple
Continued
Ignitor Electrode
5. Turn control knob counterclockwise
to the PILOT position. Press in control
knob for five (5) seconds (see Figure 19).
Note: You may be running this heater for
the first time after hooking up to gas supply. If so, the control knob may need to be
pressed in for 30 seconds or more. This will
allow air to bleed from the gas system.
• If control knob does not pop up when
released, contact a qualified service person
or gas supplier for repairs.
6. With control knob pressed in, push down
and release ignitor button (see Figure 19).
This will light pilot. The pilot is attached to
the front of burner. The pilot can be seen
through the glass panel. If needed, keep
pressing ignitor button until pilot lights.
Note: If pilot does not stay lit, refer to
Troubleshooting, page 19. Also contact a
qualified service person or gas supplier for
repairs. Until repairs are made, light pilot
with match. To light pilot with match, see
Manual Lighting Procedure, page 16.
7. Keep control knob pressed in for 30 seconds
after lighting pilot. After 30 seconds, release
control knob.
• If control knob does not pop up when
released, contact a qualified service person
or gas supplier for repairs.
Note: If pilot goes out, repeat steps 3
through 7. This heater has a safety interlock
system. Wait one (1) minute before lighting
pilot again.
8. Turn control knob counterclockwise
to desired heating level. The main burner
should light. Set control knob to any heat
level between 1 and 5.
CAUTION: Do not try to adjust heating levels by using the
equipment shutoff valve.
Control Knob
PI
OFF LOT
Ignitor Button
Pilot Burner
Figure 20 - Pilot (actual pilot may vary)
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
to the
1. Turn control knob clockwise
OFF position.
2. Turn off all electric power to the appliance
if service is to be performed.
Shutting Off Burner Only (pilot stays lit)
to the
Turn control knob clockwise
PILOT position.
THERMOSTAT
CONTROL OPERATION
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. The thermostat adjusts the
amount of gas flow to the burner. This increases
or decreases the burner flame height. 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. Selecting the
5 setting will cause the burner to remain fully on
without modulating down in most cases.
Note: The thermostat sensing bulb measures
the temperature of air near the heater cabinet.
This may not always agree with room temperature (depending on housing construction,
installation location, room size, open air temperatures, etc.). Frequent use of your heater will
let you determine your own comfort levels.
Figure 19 - Control Knob In The OFF
Position (Piezo Ignitor Shown)
107882-01K
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15
OPERATING HEATER
Continued
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 7, page 9).
2. Follow steps 1 through 5 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 for 30 seconds
after lighting pilot. After 30 seconds, release
control knob. Now follow step 8, under
Lighting Instructions, page 14.
5. Replace front panel.
INSPECTING HEATER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 21 shows a correct pilot flame pattern. Figure
22 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple.
This will cause the thermocouple to cool. When the
thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in
Figure 22
• turn heater off (see To Turn Off Gas to Appliance, page 15)
• see Troubleshooting, page 19
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.
Thermocouple
BURNER FLAME PATTERN
WARNING: If yellow tipping
occurs, your heater could produce increased levels of carbon
monoxide.
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.
If burner flame pattern is incorrect, as shown in
Figure 24
• turn heater off (see To Turn Off Gas To Appliance, page 15)
• see Troubleshooting, page 19
Blue
Flame
1/2 Glass
Height
1/2 GLASS HEIGHT
FLAME PATTERN
1/2 GLASS HEIGHT
Figure CORRECT
23 AT
- Correct
Burner Flame
Pattern
HIGH POSITION
CORRECT FLAME PATTERN
AT HIGH POSITION
Yellow Tipping
1/2 GLASS HEIGHT
Blue Flame
Pilot Burner
INCORRECT FLAME PATTERN
AT HIGH POSITION
1/2 Glass
Height
1/2 GLASS HEIGHT
INCORRECT FLAME PATTERN
Figure
24
- Incorrect
Burner Flame
AT
HIGH
POSITION
Pattern
Figure 21 - Correct Pilot Flame Pattern
Thermocouple
Yellow Flame
Pilot Burner
Figure 22 - Incorrect Pilot Flame Pattern
16
www.desatech.com
107882-01K
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner, and circulating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a
qualified service person. Heater
may need more frequent cleaning due to excessive lint from
carpeting, bedding material, pet
hair, etc.
WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clean may result in
sooting and property damage.
ODS/PILOT AND BURNER
Use a vacuum cleaner, pressurized air, or small,
soft bristled brush to clean.
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.
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 compressed 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.
1. Shut off the unit, including the pilot. Allow
the unit to cool for at least thirty minutes.
2. Inspect burner and pilot for dust and dirt.
107882-01K
3. Blow air through the ports/slots and holes in
the burner.
4. Never insert objects into the pilot tube.
Clean the pilot assembly also. A yellow tip on the
pilot flame indicates dust and dirt in the pilot assembly. 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.
Pilot Assembly
Pilot Air Inlet
Figure 25 - Pilot Inlet Air (Propane/LP
Pilot Shown)
CABINET
Air Passageways
Use a vacuum cleaner or pressurized air to
clean.
Exterior
Use a soft cloth dampened with a mild soap and
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17
SPECIFICATIONS
CBN20/CBN20T CBN30T
CBT20NT
CBT30NT
SBN20
10,000/20,000
15,000/30,000 10,000/20,000 15,000/30,000
--------------------------------Natural Only--------------------------------Piezo
Piezo
Electronic
Electronic
3" W.C.
3" W.C.
3" W.C.
3"W.C.
Btu (Variable)
Type Gas
Ignition
Pressure Regulator Setting
Inlet Gas Pressure (in. of water)
Maximum
10.5"
Minimum
4"
Dimensions, Inches (H x W x D)
Heater (With knobs & grill) 26.25x18.25x7
Carton
28.25x21.25x9
Weight (pounds)
Heater
20
Shipping
25
10.5"
4"
10.5"
4"
10.5"
4"
26.25x25.75x7
28.25x29x9
26.25x18.25x7
28.25x21.25x9
26.25x25.75x7
28.25x29x9
28
33
20
25
28
33
CBP20/CBP20T CBP30T
CBT20PT
CBT30PT
SBP20
Btu (Variable)
10,000/20,000
15,000/30,000 10,000/20,000 15,000/30,000
Type Gas
--------------------------------Propane/LP Only---------------------------Ignition
Piezo
Piezo
Electronic
Electronic
Pressure Regulator Setting
8" W.C.
8" W.C.
8" W.C.
8" W.C.
Inlet Gas Pressure (in. of water)
Maximum
14"
14"
14"
14"
Minimum
11"
11"
11"
11"
Dimensions, Inches (H x W x D)
Heater (With knobs & grill) 26.25x18.25x7
26.25x25.75x7 26.25x18.25x7 26.25x25.75x7
Carton
28.25x21.25x9
28.25x29x9
28.25x21.25x9 28.25x 29x9
Weight (pounds)
Heater
20
28
20
28
Shipping
25
33
25
33
18
www.desatech.com
107882-01K
TROUBLESHOOTING
WARNING: Turn off and unplug heater and let cool before servicing.
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,
there is no spark at ODS/pilot
1. Ignitor electrode positioned
wrong
2. Ignitor electrode broken
3. Ignitor electrode not connected to ignitor cable
4. Ignitor cable pinched or wet
1. Replace pilot assembly
2. Replace pilot assembly
3. Reconnect ignitor cable
4. Free ignitor cable if pinched
by any metal or tubing. Keep
ignitor cable dry
5. Replace ignitor cable
5. Broken ignitor cable
6. Replace ignitor
6. Bad ignitor
7. Battery not installed, battery 7. Install new alkaline battery in
electronic ignitor. Verify batpower low, or battery not
tery is installed correctly
installed correctly (electronic
ignition models only)
When ignitor button is pressed,
there is spark at ODS/pilot but
no ignition
107882-01K
1. Gas supply turned off or equipment shutoff valve closed
2. Control knob not in PILOT
position
3. Control knob not pressed in
while in PILOT position
4. Air in gas lines when installed
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while in
PILOT position
4. Continue holding down control knob. Repeat igniting operation until air is removed
5. Depleted gas supply (pro- 5. Contact local propane/LP gas
company
pane/LP gas only)
6. Clean ODS/pilot (see Cleaning
6. ODS/pilot is clogged
and Maintenance, page 17) or
replace ODS/pilot assembly
7. Gas regulator setting is not 7. Replace gas regulator
correct
www.desatech.com
19
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
ODS/pilot lights but flame 1. Control knob not fully pressed in
goes out when control knob is 2. Control knob not pressed in
released
long enough
3. Safety interlock system has
been triggered
4. Equipment shutoff valve not
fully open
5. Thermocouple connection
loose at control valve
6. Pilot flame not touching
thermocouple, which allows
thermocouple to cool, causing pilot flame to go out. This
problem could be caused by
one or both of the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
7. Thermocouple damaged
8. Control valve damaged
Burner does not light after ODS/
pilot is lit
Delayed ignition of burner
Burner backfiring during
combustion
Yellow flame during burner
combustion
1. Burner orifice is clogged
2. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Burner orifice is clogged or
damaged
2. Burner damaged
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
3. Clogged or dirty burner
Slight smoke or odor during initial 1. Residues from manufacturing
operation
processes
20
www.desatech.com
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep control knob pressed in 30 seconds
3. Wait one minute for safety interlock system to reset. Repeat
ignition operation
4. Fully open equipment shutoff
valve
5. Hand tighten until snug, then
tighten 1/4 turn more
6. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 17) or replace ODS/pilot
assembly
7. Replace pilot assembly
8. Replace control valve
1. Clean burner (see Cleaning
and Maintenance, page 17)
or replace burner orifice
2. Contact local natural or propane/LP gas company
1. Contact local natural or propane/LP gas company
2. Clean burner (see Cleaning
and Maintenance, page 17)
or replace burner orifice
1. Clean burner (see Cleaning
and Maintenance, page 17)
or replace burner orifice
2. Replace burner
3. Replace gas regulator
1. Check burner for dirt and debris. If found, clean burner (see
Cleaning and Maintenance,
page 17)
2. Replace gas regulator
3. Clean burner (see Cleaning
and Maintenance, page 17)
1. Problem will stop after a few
hours of operation
107882-01K
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. Follow 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.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Heater produces a whistling noise 1. Turning control knob to posi- 1. Turn control knob to position 1
and let warm up for a minute
when burner is lit
tion 5 when burner is cold
2. Operate burner until air is
2. Air in gas line
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 17)
or replace burner orifice
White powder residue forming 1. When heated, vapors from 1. Turn heater off when using
furniture polish, wax, carpet
within burner box or on adjacent
furniture polish, wax, carpet
walls or furniture
cleaners, or similar products
cleaner, etc., may turn into
white powder residue
Heater produces a clicking/tick- 1. Metal expanding while heating 1. This is common with most heator contracting while cooling
ing noise just after burner is lit
ers. If noise is excessive, contact
or shut off
qualified service person
Heater produces unwanted 1. Heater burning vapors from 1. Ventilate room. Stop using
odor causing products while
odors
paint, hair spray, glues, etc.
(see IMPORTANT statement
heater is running
above)
2. Low fuel supply (propane/LP 2. Refill supply tank
gas only)
3. Gas leak. See Warning 3. Locate and correct all leaks
(see Checking Gas Connecstatement above
tions, page 13)
Heater shuts off in use (ODS 1. Not enough fresh air is
operates)
available
2. Low line pressure
3. ODS/pilot is partially
clogged
107882-01K
www.desatech.com
1. Open window and/or door for
ventilation
2. Contact local natural or propane/LP gas company
3. Clean ODS/pilot (see Cleaning
and Maintenance, page 17)
21
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Gas odor even when control knob
is in OFF position
1. Gas leak. See Warning
statement on page 21
1. Locate and correct all leaks
(see Checking Gas Connections, 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 on page 21
(see Checking Gas Connections, page 13)
Moisture/condensation noticed
on windows
1. Not enough combustion/ven- 1. Refer to Air for Combustion
and Ventilation requirements
tilation air
(page 5)
SERVICE HINTS
REPLACEMENT PARTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• heater will not produce specified heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If so, contact your local natural or propane/LP gas supplier.
Note: Use only original replacement parts. This
will protect your warranty coverage for parts
replaced under warranty.
TECHNICAL SERVICE
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 DESA Heating Productsʼ technical service web site at www.desatech.com.
SERVICE PUBLICATIONS
You can purchase a service manual from the address
listed on the back page of this manual. Send a check
for $5.00 payable to DESA Heating Products.
22
PARTS UNDER WARRANTY
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.
When calling DESA Heating Products, have
ready
• your name
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
Usually, we will ask you to return the part to the
factory.
PARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If they
canʼt supply original replacement part(s), either
contact your nearest Parts Central (see page 30)
or call DESA Heating Products at 1-866-672-6040
for referral information.
When calling DESA Heating Products, have
ready
• model number of your heater
• the replacement part number
www.desatech.com
107882-01K
ACCESSORIES
Purchase these heater accessories from your local
dealer. If they can not supply these accessories, either
contact your nearest Parts Central (see page 30) or
call DESA Heating Products at 1-866-672-6040
for referral information. You can also write to the
address listed on the back page of this manual.
BASE KIT - GA4550
EQUIPMENT SHUTOFF VALVE
GA5010
For all models. Equipment shutoff valve with
1/8" NPT tap.
For all models. For locating heater on the floor,
away from a wall. Complete installation and operating instructions included.
ELECTRONIC IGNITOR KIT - GA435
Not Shown
For all piezo ignitor models. Provides easier
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.
107882-01K
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23
ILLUSTRATED PARTS BREAKDOWN
MODELS
CBN20
CBP20
SBN20
SBP20
7
15
1
22
21
4
20
9
18
12
17
13
11
10
9
14
19
8
16
5
6
3
2
24
www.desatech.com
107882-01K
PARTS LIST
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 22 of this manual.
PART NUMBER
KEY
NO.
CBN20
SBN20
CBP20
SBP20
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
097159-04
107954-01
107879-02
110038-03
107677-01
098260-12
**
107894-08
098271-09
098249-01
110803-01
110186-01
103446-01
099387-05
103845-06
099066-02
099415-17
NJF 8C
103570-04
103572-03
098508-01
098354-02
109303-04
097159-04
107954-01
107879-02
110038-04
107677-01
098260-12
**
107894-08
098271-09
098249-01
110803-02
110186-01
103446-01
099387-05
103845-05
099066-02
099415-18
NJF 8C
103570-04
103572-03
098508-01
098354-02
109303-04
Piezo Ignitor
Front Panel
Grill Guard
Control Valve
Glass Retainer
Glass
Cabinet
Deflector Assembly
Ignitor Cable
ODS Pilot Nut
ODS/Pilot Assembly
Thermocouple Kit
Burner
3/16" Pilot Tubing
Injector
Mounting Bracket
Gas Regulator
Hex Nut
3/8" Outlet Tubing
3/8" Inlet Tubing
Valve Retainer Nut
Control Knob
Baffle
12
13
14
15
16
17
18
19
20
21
22
QTY.
1
1
1
1
2
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
PARTS AVAILABLE — NOT SHOWN
100642-03
105345-01
107888-01
109483-01
100642-03
105345-01
107888-01
109483-01
Hardware Assembly
Cable Tie
Control Position Label
Lighting Instruction Plate
1
1
1
1
** Not a field replaceable part.
107882-01K
www.desatech.com
25
ILLUSTRATED PARTS BREAKDOWN
MODELS
CBN20T, CBP20T
CBN30T, CBP30T
CBN20TK, CBP20TK
7
1
20
4
15
9
17
12
13
11
10
9
14
18
19
8
16
5
3
6
2
26
www.desatech.com
107882-01K
PARTS LIST
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 22 of this manual.
PART NUMBER
KEY CBN20T
NO. CBN20TK
CBP20TK
CBP20T
CBN30T
CBP30T
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
097159-04
107954-01
107879-02
098522-11
107677-01
098260-12
**
107894-08
098271-09
098249-01
110803-02
110186-01
103446-01
099387-03
103845-05
099066-02
099415-18
NJF 8C
103255-02
103256-02
109303-04
097159-04
107955-01
107879-01
098522-12
107677-01
098260-13
**
107894-09
098271-09
098249-01
110803-01
110186-01
103447-01
099387-03
103845-08
099066-02
099415-17
NJF 8C
103255-02
103256-02
109303-03
097159-04
107955-01
107879-01
098522-13
107677-01
098260-13
**
107894-09
098271-09
098249-01
110803-02
110186-01
103447-01
099387-03
103845-07
099066-02
099415-18
NJF 8C
103255-02
103256-02
109303-03
Piezo Ignitor
Front Panel
Grill Guard
Thermostat Gas Valve
Glass Retainer
Glass
Cabinet
Deflector Assembly
Ignitor Cable
ODS Pilot Nut
ODS/Pilot Assembly
Thermocouple Kit
Burner
3/16" Pilot Tubing
Injector
Mounting Bracket
Gas Regulator
Hex Nut
3/8" Outlet Tubing
3/8" Inlet Tubing
Baffle
12
13
14
15
16
17
18
19
20
097159-04
107954-01
107879-02
098522-28
107677-01
098260-12
**
107894-08
098271-09
098249-01
110803-01
110186-01
103446-01
099387-03
103845-06
099066-02
099415-17
NJF 8C
103255-02
103256-02
109303-04
QTY.
1
1
1
1
2
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
PARTS AVAILABLE — NOT SHOWN
100642-03
105345-01
107888-01
109483-01
100642-03
105345-01
107888-01
109483-01
100642-03
105345-01
107888-01
109483-01
100642-03
105345-01
107888-01
109483-01
Hardware Assembly
Cable Tie
Control Position Label
Lighting Instruction Plate
1
1
1
1
** Not a field replaceable part.
107882-01K
www.desatech.com
27
ILLUSTRATED PARTS BREAKDOWN
MODELS
CBT20NT, CBT20PT
CBT30NT, CBT30PT
7
20
4
1
15
9
12
17
13
11
10
9
14
18
19
8
16
5
3
6
2
Install Battery According
To This Illustration
(Determine which ignitor
your heater uses)
AAA
Battery
Negative
UP
28
www.desatech.com
AA
Battery
Positive
UP
107882-01K
PARTS LIST
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 22 of this manual.
KEY
PART NUMBER
NO.
CBT20NT
CBT20PT
CBT30NT
CBT30PT
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
111435-01
107954-03CV
107879-02
098522-28
107677-01
098260-12
**
107894-08
098271-11
098249-01
110803-01
110186-01
103446-01
099387-03
103845-06
099066-02
099415-17
NJF 8C
103255-02
103256-02
109303-04
111435-01
107954-03CV
107879-02
098522-11
107677-01
098260-12
**
107894-08
098271-11
098249-01
110803-02
110186-01
103446-01
099387-03
103845-05
099066-02
099415-18
NJF 8C
103255-02
103256-02
109303-04
111435-01
107955-03CV
107879-01
098522-12
107677-01
098260-13
**
107894-09
098271-11
098249-01
110803-01
110186-01
103447-01
099387-03
103845-08
099066-02
099415-17
NJF 8C
103255-02
103256-02
109303-03
111435-01
107955-03CV
107879-01
098522-13
107677-01
098260-13
**
107894-09
098271-11
098249-01
110803-02
110186-01
103447-01
099387-03
103845-07
099066-02
099415-18
NJF 8C
103255-02
103256-02
109303-03
Electronic Ignitor
Front Panel
Grill Guard
Thermostat Gas Valve
Glass Retainer
Glass
Cabinet
Deflector Assembly
Ignitor Cable
ODS Pilot Nut
ODS/Pilot Assembly
Thermocouple Kit
Burner
3/16" Pilot Tubing
Injector
Mounting Bracket
Gas Regulator
Hex Nut
3/8" Outlet Tubing
3/8" Inlet Tubing
Baffle
1
1
1
1
2
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
100642-03
105345-01
107888-03
109483-01
100642-03
105345-01
107888-03
109483-01
Hardware Assembly
Cable Tie
Control Position Label
Lighting Instruction
Plate
1
1
1
12
13
14
15
16
17
18
19
20
QTY.
PARTS AVAILABLE — NOT SHOWN
100642-03
105345-01
107888-03
109483-01
100642-03
105345-01
107888-03
109483-01
1
** Not a field replaceable part.
107882-01K
www.desatech.com
29
PARTS CENTRALS
These Parts Centrals are privately owned businesses. They have agreed to support our customerʼs needs
by providing original replacement parts and accessories.
Tool and Equipment, Co.
5 Manila Ave
Hamden, CT 06514-0322
1-800-397-7553
203-248-7553
Portable Heater Parts
342 N. County Rd. 400 East
Valparaiso, IN 46383-9704
219-462-7441
1-888-619-7060
www.portableheaterparts.com
sales@portableheaterparts.com
techservice@portableheaterparts.com
FBD
1349 Adams Street
Bowling Green, KY 42103-3414
270-846-1199
1-800-654-8534
Fax: 1-800-846-0090
franktalk@aol.com
Master Parts Dist.
1251 Mound Ave. NW
Grand Rapids, MI 49504-2672
616-791-0505
1-800-446-1446
www.nbmc.com
30
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108-2195
KS, MO, AR
816-842-3911
www.washerparts.com
East Coast Energy
707 Broadway
W. Long Branch, NJ 07764-1542
732-870-8809
1-800-755-8809
www.njplaza.com/ecep
Laportes Parts & Service
2444 N. 5th Street
Hartsville, SC 29550-7704
843-332-0191
Parts Department
Cans Unlimited
P.O. Box 645
Taylor, SC 29687-0013
803-879-3009
1-800-845-5301
cuisales@aol.com
www.desatech.com
107882-01K
NOTES
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______________________________________________________
_____________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
______________________________________________________
107882-01K
www.desatech.com
31
WARRANTY INFORMATION
KEEP THIS WARRANTY
Model ____________________________________
Serial No. __________________________________
Date of Purchase ____________________________
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 WARRANTY
VENT-FREE RESIDENTIAL GAS HEATERS
DESA Heating Products warrants this product to be free from defects in materials and components for two (2)
years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions. To make a claim under this warranty the Bill of Sale or
cancelled check must be presented.
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 Products Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of
this product and/or DESA Heating 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, INCLUDING 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:
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
107882 01
NOT A UPC
107882-01
Rev. K
05/04