Desa CBT30NT, CBT30PT, CBP20TK, CBT20NT, CBT20PT User Manual

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CBN20, CBP20

SBN20, SBP20 CBN20T, CBP20T CBN30T, CBP30T

CBT20NT, CBT20PT CBT30NT, CBT30PT

CBN20TK, CBP20TK

UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER

SAFETY INFORMATION AND INSTALLATION MANUAL

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.

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

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 4 of this manual.

Save this manual for future reference.

TABLE OF CONTENTS SAFETY INFORMATION

TABLE OF CONTENTS

SAFETY INFORMATION ............................................................ 2

LOCAL CODES........................................................................... 3

PRODUCT IDENTIFICATION ..................................................... 3

UNPACKING ............................................................................... 3

PRODUCT FEATURES .............................................................. 3

AIR FOR COMBUSTION AND VENTILATION ........................... 4

INSTALLATION........................................................................... 7

OPERATING HEATER .............................................................. 13

INSPECTING HEATER ............................................................. 14

CLEANING AND MAINTENANCE ............................................ 15

SPECIFICATIONS .................................................................... 16

SAFETY INFORMATION

WARNINGS

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 any accessory not ap-

proved for use with this heater.

SERVICE HINTS....................................................................... 16

TECHNICAL SERVICE ............................................................. 16

SERVICE PUBLICATIONS ....................................................... 16

TROUBLESHOOTING .............................................................. 17

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 20

REPLACEMENT PARTS .......................................................... 26

ACCESSORIES ........................................................................ 26

OWNER’S REGISTRATION FORM .......................................... 27

PARTS CENTRALS .................................................................. 29

WARRANTY INFORMATION......................................Back Cover

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).

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107882-01H

SAFETY INFORMATION

LOCAL CODES

PRODUCT IDENTIFICATION

UNPACKING

PRODUCT FEATURES

SAFETY INFORMATION PRODUCT IDENTIFICATION

3. If you smell gas

• shut off gas supply

• do not try to light any appliance

• do not touch any electrical switch; do not use any phone in your building

• immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions

• if you cannot reach your gas supplier, call the fire department

4. This 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 do wn the heater if not enough fresh air is available. See Air for Combustion and Ventilation , pages 4 through 6.

6. Keep all air openings in 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 pre vent 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.

Control Knob & Ignitor Button

Heater Cabinet

Front Panel

Figure 1 - Vent-Free Gas Heater

(not seen from this view)

Grill Guard

Glass Panel

UNPACKING

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.

PRODUCT FEATURES

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

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107882-01H

SAFETY DEVICE

This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for ventfree 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.

AIR FOR COMBUSTION AND VENTILATION

Providing Adequate Ventilation

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.

Today’s homes are built more energy efficient than ever. New materials, increased insulation, and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, home owners want their homes as airtight as possible.

While it is good to make your home energy 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 4 through 6 will help you classify your

space and provide adequate ventilation.

Unusually tight construction is defined as construction where:

a. walls and ceilings e xposed to the outside atmosphere

have a continuous water vapor retarder with a rating of one perm (6x10 openings gasketed or sealed

b. weather stripping has been added on openable win-

dows and doors

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 f or 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

From Outdoors

If your home does not meet all of the three criteria above, proceed to

tion

, page 5.

, page 6.

Determining Fresh-Air Flow For Heater Loca-

-11

kg per pa-sec-m2) or less with

and

Ventilation Air

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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107882-01H

AIR FOR COMBUSTION AND VENTILATION

Continued

AIR FOR COMBUSTION AND VENTILATION

Determining Fresh-Air Flow For Heater Location

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:

height) = 2560 cu. ft. (volume of space) If additional ventilation to adjoining room is supplied with grills or open-

ings, add the volume of these rooms to the total volume of the space.

2. Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support.

__________ (volume of space) x 20 = (Maximum Btu/Hr the space

Example:

Btu/Hr the space can support)

3. Add the Btu/Hr of all fuel burning appliances in the space.

* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.

Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling

can support)

2560 cu. ft. (volume of space) x 20 = 51,200 (maximum

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

Example:

Gas water heater _____________ Btu/Hr Vent-free heater + _____________ Btu/Hr Total = _____________ Btu/Hr

40,000 20,000 60,000

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:

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 V entilation Air F r om Inside Building, page 6.

B. Vent room directly to the outdoors. See Ventilation Air From Out-

doors, page 6.

C. Install a lower Btu/Hr heater , if lower Btu/Hr size mak es 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.

51,200 Btu/Hr (maximum the space can support) 60,000 Btu/Hr (actual amount of Btu/Hr used)

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

107882-01H

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AIR FOR COMBUSTION AND VENTILATION

Ventilation Air

AIR FOR COMBUSTION AND VENTILATION

Continued

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:

attic if attic has a thermostat-controlled power vent. Heated air entering the attic will activate the power vent.

Do not provide openings for inlet or outlet air into

Ventilation Grills

Ventilation

Grills

into Adjoining

Room,

Option 1

Figure 2 - Ventilation Air from Inside Building

Remove Door into Adjoining

Room,

Option 3

Into Adjoining Room,

Option 2

12"

Outlet Air

Inlet Air

Figure 3 - Ventilation Air from Outdoors

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Ventilated Attic

Crawl Space

To Attic

Crawl

Space

Ventilated

107882-01H

INSTALLATION

Check Gas Type

Installation Items

Locating Heater

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 in-

stall heater. Follow all local codes.

CHECK GAS TYPE

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.

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 design-certified equipment shutoff valve can be purchased from your dealer. See Accessories, page 26.

LOCATING HEATER

WARNING: Maintain the minimum clearances shown in Figure 4. If you can, provide greater clearances from floor, ceiling, and joining wall.

WARNING: Never install the heater

• in a bedroom or bathroom

• in a recreational vehicle

• where curtains, furniture, clothing, or other flam-

mable 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.

CEILING

36"

Minimum From Sides Of Heater

Left Side

FLOOR

Figure 4 - Mounting Clearances As Viewed From Front of Heater

IMPORTANT:

Vent-free heaters add moisture to the air. Although

Minimum

Right Side

Minimum To Top Surface Of Carpeting Tile Or Other Combustible Material

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 4 through 6. If high humidity is experienced, a dehumidifier may be used to help lower the water vapor content in the air.

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 26). Determine which method is best for your application.

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107882-01H

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 26. If planning to use fan, locate heater near an electrical outlet.

INSTALLATION

Thermostat Sensing Bulb Installing Heater To Wall

INSTALLATION

Continued

THERMOSTAT SENSING BULB

The thermostat sensing bulb has been placed inside the heater for protection during shipping.

Locating Thermostat Sensing Bulb (for thermostat applications)

1. Remove front panel of heater (see Figure 7).

2. Locate thermostat sensing bulb just under burner assembly.

IMPORTANT:

proper operation.

Attach thermostat sensing bulb to back of heater for

Attaching Thermostat Sensing Bulb

1. Remove thermostat sensing bulb from holders inside heater. Route through slot opening in bottom of heater.

2. Place clamp on thermostat sensing bulb as shown in Figure 5. Clamp is provided in hardware package.

3. Snap clamp into upper mounting hole as shown in Figure 5. Mounting hole is located on lower left edge on back of heater . Make sure the thermostat sensing bulb is pointing up.

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.

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.

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.

Figure 6 - Mounting Bracket

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WARNING: Maintain minimum clearances shown in Figure 8, page 9. If you can, provide greater clearances from floor and joining wall.

107882-01H

INSTALLATION

Continued

INSTALLATION

Installing Heater To Wall (Cont.)

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 wall.

12"

Min.

Only Insert Mounting Screws Through Last

Adjoining Wall

14"

Hole On Each End

Floor

18 3/4"

Min.

30,000 Btu/hr Models

Min.

Only Insert Mounting Screws Through Last

Hole On Each End

Adjoining Wall

14"

18 3/4"

Min.

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 wall anchor (wings first) into hole. Tap anchor flush to wall.

4. For thin walls (1/2" or less), insert red key into wall anchor. Push red key to “pop” open anchor wings.

IMPORTANT:

Do not hammer key! For thick walls (over 1/2" thick) or solid walls, do not pop open wings.

5. Place mounting bracket onto wall. Line up last hole on each end of bracket with wall anchors.

6. Insert mounting screws through bracket and into wall anchors.

7. Tighten screws until mounting bracket is f irmly fastened to wall.

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.

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 9 - Folding Anchor

Horizontal Slots

Stand-Out Tab

Figure 11 - Mounting Heater Onto Mounting Bracket

Figure 10 - Popping Open Anchor Wings For Thin Walls

Mounting Bracket (attached to wall)

107882-01H

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INSTALLATION

Installing Heater To Wall (Cont.) Mounting Heater To Floor

INSTALLATION

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 Attac hing T o W all Anc hor Method, page 9.

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 and 12).

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.

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 F ront Panel of Heater , page 8).

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 Figure 13.

Front View

Heater

Spacer

Side View

Figure 12 - Installing Bottom Mounting Screws

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Wood Screw

Wall

Base Foot

Sheet Metal Screw

Figure 13 - Installing Base Feet

107882-01H

INSTALLATION

Continued

INSTALLATION

Connecting To Gas Supply

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

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.

Figure 14 - External Regulator With Vent Pointing Down

CAUTION: Use only new, black iron or steel pipe. Internally-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.

: For natural gas, check gas line pressure before

Propane/LP Supply Tank

External Regulator

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).

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. 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.

Pressure Regulator

3/8" NPT Pipe Nipple

Tee Joint

Test

Gauge

Connection*

Sediment Trap

Figure 15 - Gas Connection

Reducer Bushing to 1/8" NPT

1/8" NPT Plug Tap

Tee Joint

Pipe Nipple

Cap

3" Minimum

Ground Joint Union

Equipment Shutoff Valve *

Natural Gas

From Gas Meter (5" W.C. to 10.5" W.C. Pressure)

Propane/LP

From External Regulator (11" W.C. to 14" W.C. Pressure)

Note:

bracket not shown for clarity

Heater Cabinet

* 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 26.

Burner

107882-01H

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INSTALLATION

N T

O S

Checking Gas Connections

INSTALLATION

Continued

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

to Gas Supply

, page 11.

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) or propane/LP supply tank for propane/LP gas, to equipment shutoff valve (see Figure 18). Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

4. Correct all leaks at once.

Connecting

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. F or 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 13). Check all other internal joints for leaks.

7. Turn off heater (see To Turn Off Gas to Appliance, page 14).

8. Replace front panel.

Open

POSI

Equipment Shutoff Valve

Closed

Figure 16 - Equipment Shutoff Valve

Thermostat Gas Valve

Gas Meter

Equipment Shutoff Valve

Figure 17 - Checking Gas Joints for Natural Gas

Propane/LP Supply Tank

Figure 18 - Checking Gas Joints for Propane/LP Gas

Thermostat Gas Valve

Equipment Shutoff Valve

For more information, visit www.desatech.com

107882-01H

OPERATING HEATER

FOR YOUR SAFETY READ

BEFORE LIGHTING

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 ar ea

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 neighbor’s phone. Follow the gas supplier’s 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, don’t try to repair it, call a qualified service technician or gas supplier. Force or attempted repair may result in a fire or explosion.

D. Do not use this appliance if any part has been under water.

Immediately 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 abov e. If you don’t smell gas, go to the next step.

5. T urn control knob counter clockwise to the PILOT position. Press in control knob for f ive (5) seconds (see F igure 19).

OPERATING HEATER

For Your Safety Read Before Lighting

Note:

You may be running this heater for the first time

Lighting Instructions

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 Fig ure 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, pages 17 through 19. Also contact a qualified service person or gas supplier for repairs. Until r epairs are made, light pilot with match. To light pilot with match, see Manual Lighting Procedure, page 14.

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. W ait 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 HI and LO.

CAUTION: Do not try to adjust heating levels by

using the equipment shutoff valve.

Ignitor Button

IGNITOR

Figure 19 - Control Knob In The OFF Position (Piezo Ignitor Shown)

Thermocouple

Control Knob

Ignitor Electrode

Pilot Burner

107882-01H

Figure 20 - Pilot (actual pilot may vary)

For more information, visit www.desatech.com

OPERATING HEATER

To Turn Off Gas To Appliance Thermostat Control Operation Manual Lighting Procedure

INSPECTING HEATER

Pilot Flame Pattern

OPERATING HEATER

Continued

TO TURN OFF GAS

TO APPLIANCE

Shutting Off Heater

1. Turn control knob clockwise to the OFF position.

2. Turn off all electric power to the appliance if service is to be performed.

Shutting Off Burner Only (pilot stays lit)

Turn control knob clockwise to the 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 HI and LO. Selecting the HI 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.

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)

• see Troubleshooting, pages 17 through 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

Figure 21 - Correct Pilot Flame Pattern

Thermocouple

Blue Flame

Pilot Burner

Yellow Flame

Pilot Burner

MANUAL LIGHTING

PROCEDURE

1. Remove front panel (see Figure 7, page 8).

2. Follow steps 1 through 5 under Lighting Instructions, page 13.

3. With control knob pressed in, strik e 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 13.

5. Replace front panel.

For more information, visit www.desatech.com

Figure 22 - Incorrect Pilot Flame Pattern

107882-01H

INSPECTING HEATER

Burner Flame Heater

CLEANING AND MAINTENANCE

ODS/Pilot and Burner

Cleaning Burner Pilot Air Inlet

Cabinet

INSPECTING HEATER

Continued

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 14)

• see Troubleshooting, pages 17 through 19

Blue Flame

/2 Glass

1/2

Height

Figure 23 - Correct Burner Flame Pattern

Yellow Tipping

/2 Glass

1/2

Height

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 t hr ee 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 don't follow directions on the can, you could damage the pilot assembly.

1. Shut off the unit, including the pilot. Allo w the unit to cool for

at least thirty minutes.

2. Inspect burner, pilot for dust and dirt.

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

Figure 24 - Incorrect Burner Flame Pattern

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.

For more information, visit www.desatech.com

107882-01H

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 water mixture. Wipe the cabinet to remove dust.

SPECIFICATIONS

SERVICE HINTS TECHNICAL SERVICE SERVICE PUBLICATIONS

SPECIFICATIONS

CBN20/CBN20T CBN30T CBT20NT CBT30NT SBN20

Btu (Variable) 10,000/20,000 15,000/30,000 10,000/20,000 15,000/30,000 Type Gas Natural Only Natural Only Natural Only Natural Only Ignition Piezo Piezo Electronic Electronic Pressure Regulator Setting 3" W.C. 3" W.C. 3" W.C. 3" W.C. Inlet Gas Pressure (in. of water)

Maximum 10.5" 10.5" 10.5" 10.5" Minimum 4" 4" 4" 4"

Dimensions, Inches (H x W x D)

Heater (Includes knobs & grill) 26.25 x 18.25 x 7 26.25 x 25.75 x 7 26.25 x 18.25 x 7 26.25 x 25.75 x 7 Carton 28.25 x 21.25 x 9 28.25 x 29 x 9 28.25 x 21.25 x 9 28.25 x 29 x 9

Weight (pounds)

Heater 20 28 20 28 Shipping 25 33 25 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 Propane/LP Only Propane/LP Only 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 (Includes knobs & grill) 26.25 x 18.25 x 7 26.25 x 25.75 x 7 26.25 x 18.25 x 7 26.25 x 25.75 x 7 Carton 28.25 x 21.25 x 9 28.25 x 29 x 9 28.25 x 21.25 x 9 28.25 x 29 x 9

Weight (pounds)

Heater 20 28 20 28 Shipping 25 33 25 33

SERVICE HINTS

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.

For more information, visit www.desatech.com

TECHNICAL SERVICE

You may have further questions about installation, operation, or troubleshooting. If so, contact DESA Heating Products’ 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 Products’ 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.

107882-01H

TROUBLESHOOTING

Note:

For additional help, visit DESA

Heating Products’ technical service web site at www.desatech.com.

Note:

All troubleshooting items are listed in

order of operation.

WARNING: Turn off and unplug heater and let cool before servicing. Only a qualified service person should service and repair heater.

TROUBLESHOOTING

CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit.

OBSERVED PROBLEM

When ignitor button is pressed, there is no spark at ODS/pilot

When ignitor button is pressed, there is spark at ODS/pilot but no ignition

POSSIBLE CAUSE

1. Ignitor electrode positioned wrong

2. Ignitor electrode broken

3. Ignitor electrode not connected to ignitor cable

4. Ignitor cable pinched or wet

5. Broken ignitor cable

6. Bad ignitor

7. Battery not installed, battery power low , or battery not installed correctly (electronic ignition models only)

1. Gas supply turned off or equipment shutoff valve closed

2. Control knob not in PILOT position

3. Control knob not pressed in while in PILOT position

4. Air in gas lines when installed

5. Depleted gas supply (propane/LP gas only)

6. ODS/pilot is clogged

7. Gas regulator setting is not correct

REMEDY

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

6. Replace ignitor

7. Install new alkaline battery in electronic ignitor. Verify battery is installed correctly

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. Contact local propane/LP gas company

6. Clean ODS/pilot (see Cleaning and Maintenance, page 15) or replace ODS/ pilot assembly

7. Replace gas regulator

ODS/pilot lights but flame goes out when control knob is released

For more information, visit www.desatech.com

107882-01H

1. Control knob not fully pressed in

2. Control knob not pressed in 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

1. Press in control knob fully

2. After ODS/pilot lights, keep control knob pressed in 30 seconds

3. W ait one minute for safety interlock system to reset. Repeat ignition operation

4. Full y 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 15) or replace ODS/ pilot assembly

7. Replace pilot assembly

8. Replace control valve

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

Burner does not light after ODS/pilot is lit

Delayed ignition of burner

Burner backfiring during combustion

Yellow flame during burner combustion

Slight smoke or odor during initial operation

POSSIBLE CAUSE

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

1. Residues from manufacturing processes

REMEDY

1. Clean burner (see Cleaning and Maintenance, page 15) 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 Mainte- nance, page 15) or replace burner orifice

1. Clean burner (see Cleaning and Mainte- nance, page 15) 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 15)

2. Replace gas regulator

3. Clean burner (see Cleaning and Main- tenance, page 15)

1. Problem will stop after a few hours of operation

Heater produces a whistling noise when burner is lit

White powder residue forming within burner box or on adjacent walls or furniture

1. Turning control knob to HI position when burner is cold

2. Air in gas line

3. Air passageways on heater blocked

4. Dirty or partially clogged burner orifice

1. When heated, vapors from furniture polish, wax, carpet cleaner, etc., may turn into white powder residue

1. Turn control knob to LO 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. Observe minimum installation clearances (see Figure 4, page 7)

4. Clean burner (see Cleaning and Mainte- nance, page 15) or replace burner orifice

1. Turn heater off when using furniture polish, wax, carpet cleaners, or similar products

For more information, visit www.desatech.com

107882-01H

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.

TROUBLESHOOTING

IMPORTANT:

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.

Operating heater where impurities in air exist may create odors. Cleaning

OBSERVED PROBLEM

Heater produces a clicking/ticking noise just after burner is lit or shut off

Heater produces unwanted odors

Heater shuts off in use (ODS operates)

Gas odor even when control knob is in OFF position

POSSIBLE CAUSE

1. Metal expanding while heating or contracting while cooling

1. Heater burning vapors from paint, hair spray, glues, etc. (see statement above)

2. Low fuel supply (propane/LP gas only)

3. Gas leak. See Warning statement at

top of page

1. Not enough fresh air is available

2. Low line pressure

3. ODS/pilot is partially clogged

1. Gas leak. See Warning statement at

top of page

2. Control valve defective

IMPORTANT

REMEDY

1. This is common with most heaters. If noise is excessiv e, contact qualified service person

1. Ventilate room. Stop using odor causing products while heater is running

2. Refill supply tank

3. Locate and correct all leaks (see Check- ing Gas Connections, page 12)

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 15)

1. Locate and correct all leaks (see Check- ing Gas Connections, page 12)

2. Replace control valve

Gas odor during combustion

Moisture/condensation noticed on windows

For more information, visit www.desatech.com

107882-01H

1. Foreign matter between control valve and burner

2. Gas leak. See Warning statement at

top of page

1. Not enough combustion/ventilation air

1. Take apart gas tubing and remove foreign matter

2. Locate and correct all leaks (see Check- ing Gas Connections, page 12)

1. Ref er to Air for Combustion and Venti- lation requirements (page 4)

ILLUSTRATED PARTS BREAKDOWN

Models CBN20, CBP20, SBN20 and SBP20

ILLUSTRATED PARTS BREAKDOWN

MODELS CBN20

CBP20 SBN20 SBP20

For more information, visit www.desatech.com

107882-01H

PARTS LIST

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 26 of this manual.

PART NUMBER

KEY CBN20 CBP20 NO. SBN20 SBP20 DESCRIPTION QTY.

1 097159-04 097159-04 Piezo Ignitor 1 2 107954-01 107954-01 Front Panel 1 3 107879-02 107879-02 Grill Guard 1 4 110038-03 110038-04 Control Valve 1 5 107677-01 107677-01 Glass Retainer 2 6 098260-12 098260-12 Glass 1 7 ** ** Cabinet 1 8 107894-08 107894-08 Deflector Assembly 1 9 098271-09 098271-09 Ignitor Cable 1 10 098249-01 098249-01 ODS Pilot Nut 2 11 110803-01 110803-02 ODS/Pilot Assembly 1

110186-01 110186-01 Thermocouple Kit 1 12 103446-01 103446-01 Burner 1 13 099387-05 099387-05 3/16" Pilot Tubing 1 14 103845-06 103845-05 Injector 1 15 099066-02 099066-02 Mounting Bracket 1 16 099415-17 099415-18 Gas Regulator 1 17 NJF 8C NJF 8C Hex Nut 1 18 103570-04 103570-04 3/8" Outlet Tubing 1 19 103572-03 103572-03 3/8" Inlet Tubing 1 20 098508-01 098508-01 Valve Retainer Nut 1 21 098354-02 098354-02 Control Knob 1 22 109303-04 109303-04 Baffle 1

PARTS AVAILABLE — NOT SHOWN

100642-03 100642-03 Hardware Assembly 1

105345-01 105345-01 Cable Tie 1

107888-01 107888-01 Control Position Label 1

109483-01 109483-01 Lighting Instruction Plate 1

Models CBN20, CBP20, SBN20 and SBP20

PARTS LIST

107882-01H

** Not a field replaceable part.

For more information, visit www.desatech.com

ILLUSTRATED PARTS BREAKDOWN

Models CBN20T, CBP20T, CBN30T, CBP30T, CBN20TK, and CBP20TK

ILLUSTRATED PARTS BREAKDOWN

MODELS CBN20T, CBP20T

CBN30T, CBP30T CBN20TK, CBP20TK

For more information, visit www.desatech.com

107882-01H

Models CBN20T, CBP20T, CBN30T, CBP30T, CBN20TK, and CBP20TK

PARTS LIST

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 26 of this manual.

PART NUMBER FOR KEY CBN20T CBP20TK NO. CBN20TK CBP20T CBN30T CBP30T DESCRIPTION QTY.

1 097159-04 097159-04 097159-04 097159-04 Piezo Ignitor 1 2 107954-01 107954-01 107955-01 107955-01 Front Panel 1 3 107879-02 107879-02 107879-01 107879-01 Grill Guard 1 4 098522-10 098522-11 098522-12 098522-13 Thermostat Gas Valve 1 5 107677-01 107677-01 107677-01 107677-01 Glass Retainer 2 6 098260-12 098260-12 098260-13 098260-13 Glass 1 7 ** ** ** ** Cabinet 1 8 107894-08 107894-08 107894-09 107894-09 Deflector Assembly 1 9 098271-09 098271-09 098271-09 098271-09 Ignitor Cable 1 10 098249-01 098249-01 098249-01 098249-01 ODS Pilot Nut 2 11 110803-01 110803-02 110803-01 110803-02 ODS/Pilot Assembly 1

110186-01 110186-01 110186-01 110186-01 Thermocouple Kit 1 12 103446-01 103446-01 103447-01 103447-01 Burner 1 13 099387-03 099387-03 099387-03 099387-03 3/16" Pilot Tubing 1 14 103845-06 103845-05 103845-08 103845-07 Injector 1 15 099066-02 099066-02 099066-02 099066-02 Mounting Bracket 1 16 099415-17 099415-18 099415-17 099415-18 Gas Regulator 1 17 NJF 8C NJF 8C NJF 8C NJF 8C Hex Nut 1 18 103255-02 103255-02 103255-02 103255-02 3/8" Outlet Tubing 1 19 103256-02 103256-02 103256-02 103256-02 3/8" Inlet Tubing 1 20 109303-04 109303-04 109303-03 109303-03 Baffle 1

PARTS LIST

107882-01H

PARTS AVAILABLE — NOT SHOWN

100642-03 100642-03 100642-03 100642-03 Hardware Assembly 1

105345-01 105345-01 105345-01 105345-01 Cable Tie 1

107888-01 107888-01 107888-01 107888-01 Control Position Label 1

109483-01 109483-01 109483-01 109483-01 Lighting Instruction Plate 1

** Not a field replaceable part.

For more information, visit www.desatech.com

ILLUSTRATED PARTS BREAKDOWN

Battery

Positive

AAA

Battery

Negative

Models CBT20NT, CBT20PT, CBT30NT, and CBT30PT

ILLUSTRATED PARTS BREAKDOWN

MODELS CBT20NT, CBT20PT CBT30NT, CBT30PT

Alkaline Battery

Install Battery According To This Illustration (Determine which ignitor your heater uses)

For more information, visit www.desatech.com

107882-01H

PARTS LIST

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 26 of this manual.

KEY PART NUMBER FOR NO. CBT20NT CBT20PT CBT30NT CBT30PT DESCRIPTION QTY.

1 111435-01 111435-01 111435-01 111435-01 Electronic Ignitor 1 2

107954-03CV 107954-03CV 107954-03CV 107954-03CV 3 107879-02 107879-02 107879-01 107879-01 Grill Guard 1 4 098522-28 098522-11 098522-12 098522-13 Thermostat Gas Valve 1 5 107677-01 107677-01 107677-01 107677-01 Glass Retainer 2 6 098260-12 098260-12 098260-13 098260-13 Glass 1 7 ** ** ** ** Cabinet 1 8 107894-08 107894-08 107894-09 107894-09 Deflector Assembly 1 9 098271-11 098271-11 098271-11 098271-11 Ignitor Cable 1 10 098249-01 098249-01 098249-01 098249-01 ODS Pilot Nut 2 11 110803-01 110803-02 110803-01 110803-02 ODS/Pilot Assembly 1

Models CBT20NT, CBT20PT, CBT30NT, and CBT30PT

PARTS LIST

Front Panel 1

107882-01H

PARTS AVAILABLE — NOT SHOWN

100642-03 100642-03 100642-03 100642-03 Hardware Assembly 1

105345-01 105345-01 105345-01 105345-01 Cable Tie 1

107888-03 107888-03 107888-03 107888-03 Control Position Label 1

109483-01 109483-01 109483-01 109483-01 Lighting Instruction Plate 1

** Not a field replaceable part.

For more information, visit www.desatech.com

REPLACEMENT PARTS ACCESSORIES

REPLACEMENT PARTS

Note:

Use only original replacement parts. This will protect your

warranty coverage for parts replaced under warranty.

PARTS UNDER WARRANTY

Contact authorized dealers of this product. If they can’t supply original replacement part(s), call DESA Heating Products’ 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 can’t supply original replacement part(s), either contact your nearest Parts Central (see page 29) 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

ACCESSORIES

Purchase these heater accessories from your local dealer. If they can not supply these accessories, either contact your nearest Parts Central (see page 29) 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.

EQUIPMENT SHUTOFF VALVE - GA5010

For all models. Equipment shut o f f valve wit h 1 / 8 " NPT tap.

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.

BASE KIT - GA4550

For all models. For locating heater on the floor, away from a wall. Complete installation and operating instructions included.

For more information, visit www.desatech.com

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OWNER'S REGISTRATION FORM

In order to provide better customer service for this and future purchases, we recommend that you register your product with us. You can register online at www.desatech.com. If access to our website is not available to you, please complete this Owner’s Registration Form and mail to the address on the back of this owner’s manual. Please provide the following product information:

Brand: Model: Date Purchased: Serial Number: First Name: Last Name: Address: City: State: Zip: Country: Home Phone: ( ) - E-Mail:

Please answer the following questions to register your product with DESA Heating Products:

1. Where will the product be used? ❍ Living/Family Room ❍ Office/Warehouse ❍ Utility Shed/Outbuilding ❍ Garage ❍ Bedroom ❍ Bathroom ❍ Other

2. If you bought this product yourself, did you plan to purchase this type of product before going into the store? ❍ Yes ❍ No

3. Who selected the product? ❍ Male ❍ Female ❍ Both

4. What is the population of your area? ❍ Under 10,000 ❍ 10,000 to 25,000 ❍ 25,000 to 50,000 ❍ 50,000 to 100,000 ❍ 100,000 to 250,000 ❍ Over 250,000

5. What is your primary source of heat? ❍ Propane (LP Gas) ❍ Fuel Oil ❍ Wood ❍ Natural Gas ❍ Electric ❍ Other

6. How was the product installed? ❍ Professional Installer ❍ Self ❍ Other

7. Cost of product excluding sales tax? $___________________

8. Cost to install product? $____________________

9. Type of store where product was purchased? ❍ Hardware ❍ Propane Dealer ❍ Natural Gas/Utility Co. ❍ Home Center/Builder’s Supply ❍ Fireplace or Hearth Shop ❍ Farm Store ❍ Other

10. What motivated you to buy this product? ❍ Sudden Cold Weather ❍ Replace Older Model ❍ D.I.Y. Home Project ❍ Emergency Back-Up Heat ❍ Heater was on Sale ❍ Energy Savings/High Efficiency ❍ Construction Project ❍ Other

11. How did you learn about this product brand? ❍ Advertising ❍ Relative or Friend ❍ Store Display ❍ Other ________________________

12. Level of Education of Purchaser: ❍ Some High School ❍ Completed High School ❍ Completed College ❍ Completed Graduate School

13. Age of Purchaser: ❍ Under 20 ❍ 20 - 29 ❍ 30 - 39 ❍ 40 - 49 ❍ 50 - 59 ❍ 60 or Over

14. Buyer’s total annual household income: ❍ Under $15,000 ❍ $15,000 to $19,999 ❍ $20,000 to $34,999 ❍ $35,000 to $49,999 ❍ $50,000 to $74,999 ❍ $75,000 to $99,999 ❍ $100,000 and Over

15. Store where product was purchased: Name: ______________________________________ City: _______________________ State: __________

16. In choosing this product, how important were the following:

Availability Price Brand Name Overall Quality Heat Output Made in USA Warranty Local Service Value for Price Prior Brand Experience Controls Location Thermostat, Remote, or Manual Operation Ease of Operation Special Features Salesperson’s Recommendation Friend/Relative’s Recommendation Portability

For more information, visit www.desatech.com

Quiet Operation

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Not Important Somewhat Important Very Important

(Comfort Glow, Vanguard, etc.) (EFP33PR, VTGH33NR, etc.)

Note:

Keep receipt for warranty verification.

7 or 9 digit number located on product or identification tag.

❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍

TAPE

2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004

Postage

Required

For more information, visit www.desatech.com

TAPE

107882-01H

PARTS CENTRALS

These Parts Centrals are privately owned businesses. They have agreed to support our customer’s needs by providing original replacement parts and accessories.

PARTS CENTRAL

Baltimore Electric

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

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

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For more information, visit www.desatech.com

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 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 PRODUCTS’ 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

For more information, visit www.desatech.com

107882-01 Rev. H 10/03

107882-01H

Desa CBT30NT, CBT30PT, CBP20TK, CBT20NT, CBT20PT User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual