Desa CFS18NR User Manual

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Page 1

DESA INTERNATIONAL

UNVENTED (VENT-FREE)

NATURAL GAS LOG HEATER

Variable Manually-Controlled Models Also Design-Certified As

Vented Decorative Appliances

OWNER’S OPERATION AND INSTALLATION MANUAL

CFS18NR, VS18NR,

VS24NR VS30NR

18", 24", and 30"

Remote-Ready Models

REMOTE

OFF

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.

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 appliance is for installation only in a solid-fuel burning masonry or UL127 factory-built fireplace, or in an approved ventless firebox. It is design-certified for these installations in accordance with ANS Z21.11.2. Exception: Do not install this appliance in a factory-built fireplace that includes instructions stating it has not been tested or should not be used with unvented gas logs.

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

This appliance may be installed in an aftermarket* manufactured (mobile) home, where not prohibited by state or local codes.

* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

Air for Combustion and Ventilation

section on page 4 of this manual.

Save this manual for future reference

Page 2

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

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 Gas: Natural gas is odorless. An odor-making agent is added to the gas. The odor helps you detect a gas leak. However, the odor added to the gas can fade. Gas may be present even though no odor exists.

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.

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. 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. F ollow the gas supplier’s instructions

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

3. This heater shall not be installed in a bedroom or bathroom unless installed as a vented appliance (see Installing Damper Clamp Accessory, page 10).

4. Never install the heater

• in a recreational vehicle

• where curtains, furniture, clothing, or

other flammable objects are less than 42 inches from the front, top, or sides of the heater

• in high traffic areas

• in windy or drafty areas

5. Before installing in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned of soot, creosote, ashes and loose paint by a qualified chimney cleaner. Creosote will ignite if highly heated. Inspect chimney flue for damage. If damaged, operate heater with flue damper closed.

6. If fireplace has glass doors, never operate this heater with glass doors closed. If you operate heater with doors closed, heat buildup inside fireplace will cause glass to burst. Also if fireplace opening has vents at the bottom, you must open the vents before operating heater .

7. Y ou must operate this heater with a fir eplace screen in place. Make sure fireplace screen is closed before running heater.

8. This log heater is designed to be smokeless. If logs ever appear to smoke, turn off heater and call a qualified service per son.

Note:

During initial operation, slight smoking may occur due to log curing and heater burning manufacturing residues.

9. To prevent the creation of soot, follow the instructions in Cleaning and Main- tenance, page 18.

10. Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter burner flame patterns. Ceiling fans may create drafts that alter burner flame patterns. Altered burner patterns can cause sooting.

11. Before using furniture polish, wax, carpet cleaner, or similar products, turn heater off. If heated, the vapors from these products may create a white powder residue within burner box or on adjacent walls or furniture.

12. Do not use a blower insert, heat exchanger insert or other accessory not approved for use with this heater.

13. This heater needs fresh, outside air ventilation to run properly. This heater has an oxygen depletion sensor (ODS) pilot light safety system. The ODS shuts down the heater if not enough fresh air is available. See Air for Combustion and Ventilation, pages 4 through 6. If heater keeps shutting off, see Trouble- shooting, pages 19 through 21.

14. Do not run heater

• where flammable liquids or vapors

are used or stored

• under dusty conditions

15. Do not use this heater to cook food or burn paper or other objects.

16. Never place any objects on the heater.

17. Heater base assembly becomes very hot when running heater. K eep 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.

18. Carefully supervise young children when they are in the room with heater. When using the hand-held remote accessory, keep selector switch in the OFF position to prevent children from turning on burners with hand-held remote control unit.

19. Do not use heater if any part has been exposed to or 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 .

20. Do not operate heater if any log is broken. Do not operate heater if a log is chipped (dime-sized or larger).

21. Turn heater off and let cool before servicing, installing, or repairing. When using the hand-held remote accessory, mak e sure the selector switch is in the OFF position. Only a qualified service person should install, service, or repair heater.

22. When using the hand-held remote accessory, make sure the selector switch is in the OFF position when you are away from home for long periods of time.

23. This heater must not be connected to any external electrical source.

24. Operating heater above elevations of 4,500 feet may cause pilot outage.

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OWNER’S MANUAL

PRODUCT IDENTIFICATION

Top Middle Log

Left Front Branch

Front Burner

Piezo Ignitor

Remote Control (Optional)

Figure 1 - VS24NR Shown

TEMP

MAN

AUTO

ONLO

OFF

STATUS

Right Front Branch

Control Knob

Flame Adjustment Knob

Selector Switch (Optional)

Crossover Log

Rear Log

Base Assembly

Rear Burner

Bottom Middle Log

PRODUCT FEATURES

OPERATION

This heater is clean burning. It requires no outside venting. There is no heat loss out a vent or up a chimney. Heat is generated by realistic, dancing yellow flames. This heater is designed for vent-free operation with flue damper closed. It has been tested and approved to ANS Z21.11.2 standard for unvented heaters. State and local codes in some areas prohibit the use of vent-free heaters. This heater may also be operated as a vented decorative (ANS Z21.60) product by opening the flue damper (non-thermostat operation only).

SAFETY PILOT

This heater has a pilot with an Oxygen Depletion Sensor Shutoff System (ODS). 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.

PIEZO IGNITION SYSTEM

This heater has a piezo ignitor. This system requires no matches, batteries, or other sources to light heater.

LOCAL CODES

Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of The National Fuel Gas Code ANS Z223, also known as 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

Note:

Where listed vented decorative logs are required, thermostat operation is not permitted.

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UNPACKING

CAUTION: Do not remove the warning and instruction labels attached to the heater base assembly. These markings contain important warranty information.

1. Remove logs and heater base assembly from carton. heater base assembly by burners. This could damage heater. Always handle base assembly by grate.

2. Remove all protective packaging applied to logs and heater for shipment.

3. Check all items for any shipping damage. If damaged, promptly inform dealer where you bought heater.

Note:

Do not pick up

REMOTE CONTROL ACCESSORIES

There are four optional remote controls that can be purchased separately for this log heater:

• wall switch

• wall thermostat

• hand-held ON/OFF remote

• hand-held thermostat remote See Accessories, page 23. The wall thermostat or hand-held thermo-

stat may not be used where vented decorative listing is required.

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DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

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 fuelburning appliances.

PROVIDING ADEQUATE VENTILATION

The following are excerpts from National Fuel Gas Code. NFPA 54/ANS Z223.1, 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 and 5 will help

you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.

Unusually tight construction is defined as construction where:

a. walls and ceilings exposed to the

outside atmosphere have a continuous water vapor retarder with a rating of one perm (6x10 per pa-sec-m2) or less with openings gasketed or sealed

b. weather stripping has been

added on openable windows 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 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

From Outdoors

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

Fresh-Air Flow For Heater Location

page 5.

and

, page 5

Ventilation Air

Determining

and

-11

Confined and Unconfined Space

The National Fuel Gas Code (ANS Z223.1, 1992 Section 5.3) 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.

This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air.

* Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them.

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OWNER’S MANUAL

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:

If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.

2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.

_________________ (volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr the space can support)

Example:

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.

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 adjoin-

ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.

B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6. C. Install a lower Btu/Hr 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.

Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)

2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)

Example:

Gas water heater 40,000 Btu/Hr Vent-free heater + 33,000 Btu/Hr Total = 73,000 Btu/Hr

51,200 Btu/Hr (maximum the space can support) 73,000 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 orif the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the

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National Fuel Gas Code, ANS Z223.1, 1992, Section 5.3

or applicable local codes

Continued

Page 6

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

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 NFPA 54/ANS Z223.1, Section

5.3, Air for Combustion and Ventilation for

required size of ventilation grills or ducts.

WARNING: Rework worksheet, adding the space of the adjoining unconfined space. The combined spaces must have enough fresh air to supply all appliances in both spaces.

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.

IMPORTANT:

for inlet or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic will activate the power vent.

Do not provide openings

Ventilation

Grills

Into Adjoining

Room,

Option 1

Remove

Door into

Into Adjoining Room,

Adjoining

Room, Option

12"

Figure 2 - Ventilation Air from Inside Building

Outlet Air

Inlet Air

Figure 3 - Ventilation Air from Outdoors

Ventilated Attic

Ventilated

Crawl Space

12"

Ventilation Grills

Option 2

To Attic

Crawl

Space

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OWNER’S MANUAL

42"

16"

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.

NOTICE: A qualified service person must install heater. Follow all local codes.

NOTICE: State or local codes may only allow operation of this appliance in a vented configuration. Check your state or local codes.

WARNING: Before installing in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned of soot, creosote, ashes and loose paint by a qualified chimney cleaner. Creosote will ignite if highly heated. A dirty chimney flue may create and distribute soot within the house. Inspect chimney flue for damage. If damaged, operate heater with flue damper closed.

WARNING: Never install the

heater

• in a bedroom or bathroom unless install as a vented appliance, see page 10

• in a recreational vehicle

• where curtains, furniture, clothing, or other flammable objects are less than 42 inches from the front, top, or sides of the heater

• 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 tobacco smoke, aromatic candles, cleaning fluids, oil or kerosene lamps, etc.) in the air exist, may discolor walls.

IMPORTANT:

ture 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 Com- bustion and Ventilation, pages 4 through 6.

Vent-free heaters add mois-

CHECK GAS TYPE

Use only natural gas. If your gas supply is not natural gas, do not install heater. Call dealer where you bought heater for proper type heater.

INSTALLATION AND CLEARANCES

(Vent-Free Operation Only)

WARNING: Maintain the minimum clearances. If you can, provide greater clearances from floor, ceiling, and adjoining wall.

MINIMUM FIREPLACE

CLEARANCE TO

COMBUSTIBLE MATERIALS

Log Size Side Wall Ceiling Floor

18" 24" 30" 16" 42" 5"

LOG SIZING REQUIREMENTS

Minimum Firebox Size

Log Front

Size Height Depth Width

18" 17" 14" 20" 24" 17" 14" 26" 30" 17" 14" 32"

Carefully follow the instructions below. This will ensure safe installation into a masonry or UL127-listed manufactured fireplace, or listed vent-free firebox.

Minimum Wall and Ceiling Clearances (see Figure 4)

A. Clearances from the side of the fire-

place opening to any combustible wall should not be less than 16 inches.

B. Clearances from the top of the fireplace

opening to the ceiling should not be less than 42 inches.

WARNING: Seal any fresh air vents or ash clean-out doors located on floor or wall of fireplace. If not, drafting may cause pilot outage or sooting. Use a heatresistant sealant. Do not seal chimney flue damper.

103449

Figure 4 - Minimum Clearance to Wall and Ceiling

Continued

Page 8

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

INSTALLATION

Continued

NOTICE: Manual control heaters may be used as a vented product. If so, you must always run heater with chimney flue damper open. If running heater with damper open, noncombustible material above fireplace opening is not needed. Go to Installing Damper Clamp Accessory for Vented Operation, page 10

Minimum Noncombustible Material Clearances

If Not Using Mantel

Note:

If using a mantel, proceed to If Using

Mantel. If not using a mantel, follow the

information below. You must have noncombustible material(s)

above the fireplace opening. Noncombustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have noncombustible material behind it. Noncombustible material must extend at least 8" up (for all models). If noncombustible material is less than 12", you must install the fireplace hood accessory. See Figure 5 for minimum clearances.

IMPORTANT:

minimum clearances, you must operate heater with chimney flue damper open. Go to Installing Damper Clamp Accessory for Vented Operation, page 10.

If you cannot meet these

If Using Mantel

You must have noncombustible material(s) above the fireplace opening. Noncombustible materials (such as slate, marble, tile, etc.) must be at least 1/2 inch thick. With sheet metal, you must have noncombustible material behind it. Noncombustible material must extend at least 8 inches up. If noncombustible material is less than 12", you must install the fireplace hood acces-

Noncombustible Material Distance (A) Requirements for Safe Installation

12" or more Noncombustible material OK. Between 8" and 12" Install fireplace hood accessory (GA6050, GA6052

or GA6053 see 18" Model: Noncombustible material OK.

Less than 8" Noncombustible material must be extended to at

least 8". See cannot extend material, you must operate heater with flue damper open.

Heat Resistant Material

sory. Even if noncombustible material is more than 12", you may need the hood accessory to deflect heat away from your mantel shelf. See Figure 5 and Figures 6 and 7, page 9 for minimum clearances.

IMPORTANT:

minimum clearances, you must operate heater with chimney flue damper open. Go to Installing Damper Clamp Accessory for Vented Operation, page 10.

Accessories,

Between 8" and 12",

(A)

If you cannot meet these

page 23).

above. If you

Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace

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Page 9

OWNER’S MANUAL

Hearth

5" Min.

Combustible Material

INSTALLATION

Continued

MANTEL CLEARANCES

In addition to meeting noncombustible material clearances, you must also meet required clearances between fireplace opening and mantel shelf. If you do not meet the clearances listed below, you will need a hood.

Determining Minimum Mantel Clearances

If you meet minimum clearance between mantel shelf and top of fireplace opening, a hood is not required (see Figure 6).

Determining Minimum Mantel Clearance When Using a Hood

If minimum clearances in Figure 6 are not met, you must have a hood. When using a hood there are still certain minimum mantel clearances required. Follow minimum clearances shown in Figure 7 when using hood.

NOTICE: If your installation does not meet the minimum clearances shown, you must do one of the following:

• operate the logs only with the

flue damper open

• raise the mantel to an accept-

able height

• remove the mantel

Mantel Shelf

Minimum NonCombustible Material

10" 8" 6"

(A)

12"

Minimum NonCombustible Material Height

20" 24

Distances to Underside of Mantel

" 27

" 30"

Underside of Mantel Shelf

All minimum distances are in inches

Top of Fireplace Opening

Figure 6 - Minimum Mantel Clearances Without Using Hood

Mantel Shelf 12" 10" 8" 6"

Minimum Noncombustible Material

8" Min.

Hood (GA6050, GA6052 and GA6053)

12" 15" 18"

Distances to Underside of Mantel

All minimum distances are in inches

20"

Underside of Mantel Shelf

Top of Fireplace Opening

FLOOR CLEARANCES

A. If installing appliance on the floor level,

you must maintain the minimum distance of 14" to combustibles (see Figure 8).

B. If combustible materials are less than

14" to the fireplace, you must install appliance at least 5" above the combustible flooring (see Figure 9).

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Figure 7 - Minimum Mantel Clearances When Using Hood

Combustible

14" Min.

Figure 8 - Minimum Fireplace Clearances If Installed at Floor Level

Material

Noncombustible Material

Figure 9 - Minimum Fireplace Clearances Above Combustible Flooring

Continued

Page 10

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

INSTALLATION

Continued

INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION

Note:

When used as a vented heater, appliance must be installed only in a solid-fuel burning fireplace with a working flue and constructed of noncombustible material.

If your heater is a manually controlled model, you may use this heater as a vented product. There are three reasons for operating your heater in the vented mode:

1. The fireplace does not meet the clear-

ance to combustibles requirements for vent-free operation

2. State or local codes do not permit vent-

free operation

3. You prefer vented operation If reasons number 1 or 2 above apply to you,

you must permanently open chimney flue damper. You must install the damper clamp accessory (to order, see Accessories, page

23). This will insure vented operation (see Figure 10). The damper clamp will keep damper open. Installation instructions are included with clamp accessory.

See chart below for minimum permanent flue opening you must provide. Attach damper clamp so the minimum permanent flue opening will be maintained at all times.

Chimney Minimum Permanent

Height (ft.) Flue Opening (sq. ins.)

6' to 15' 39 sq. inches

15' to 30' 29 sq. inches

Area of Various Standard

Round Flues

Diameter (ins.) Area (sq. ins.)

5" 20 sq. inches 6" 29 sq. inches 7" 39 sq. inches 8" 51 sq. inches

Masonry Fireplace Manufactured Fireplace

Figure 10 - Attaching Damper Clamp

INSTALLING HEATER BASE ASSEMBLY

CAUTION: Do not remove the metal Data Plates attached to the heater base assembly. The Data Plates contain important warranty information.

WARNING: You must secure this heater to fireplace floor. If not, heater will move when you adjust controls. Moving heater may cause a gas leak.

WARNING: If installing in a sunken fireplace, special care is needed. You must raise the fireplace floor to allow access to heater control panel. This will insure adequate air flow and guard against sooting. Raise fireplace floor with noncombustible material. Make sure material is secure.

Damper Clamp

Damper

Damper Clamp

Damper

CAUTION: Do not pick up heater base assembly by burners. This could damage heater. Only handle base assembly by grates.

IMPORTANT:

ers are level. If heater is not level, heater will not work properly.

Make sure the heater burn-

Installation Items Needed

• hardware package (provided with heater)

• approved flexible gas hose (not provided) (if allowed by local codes)

• sealant (resistant to propane (LP) gas, not provided)

• electric drill with 3/16" drill bit

Note:

Install optional GHRCT Receiver

and Hand-Held Remote Control Kit (see Accessories, page 23) before installing gas log heater. See installation instructions included with the kit.

1. Apply pipe joint sealant lightly to male

threads of gas fitting. Connect approved flexible gas hose to inlet side of gas control (see Figure 11, page 11).

IMPORTANT:

wrench when connecting flexible gas hose.

2. Position heater base assembly in

fireplace.

Hold gas fitting with

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Page 11

OWNER’S MANUAL

INSTALLATION

Continued

3. Mark screw locations through holes in front panel of base (see Figure 12). If installing in a brick-bottom fireplace, mark screw locations in mortar joint of bricks.

4. Remove heater base from fireplace.

5. Drill holes at marked locations using 3/16" masonary drill bit.

6. Attach base to fireplace floor using two masonry screws (in hardware package).

7. Connect to gas supply. See Connect- ing To Gas Supply.

Gas Control

Flexible Gas Hose (if allowed by local codes)

Figure 11 - Attaching Flexible Gas Hose to Heater Gas Regulator

Masonry Screws

Figure 12 - Attaching Base to Fireplace Floor

CONNECTING TO GAS SUPPLY

NOTICE: A qualified service person must connect heater to gas supply. Follow all local codes.

Installation Items Needed

Before installing heater, make sure you have the items listed below.

• piping (check local codes)

• sealant (resistant to LP gas)

• manual shutoff valve *

• test gauge connection *

• sediment trap

• tee joint

• pipe wrench * An A.G.A. design-certified manual shutoff

valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories, page 23.

WARNING: Never connect heater to private (non-utility) gas wells. This gas is commonly known as wellhead gas.

A.G.A. Design-Certified Manual Shutoff Valve With 1/8" NPT Tap*

From Gas Supply (5" W.C.** to

10.5" W.C. Pressure)

Tee

Joint Sediment Trap

Pipe

Nipple

Cap

3" Minimum

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 1/2" diameter or greater to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur.

Installation must include a manual 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 13).

Apply pipe joint sealant lightly to male threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves.

CAUTION: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.

Install sediment trap in supply line as shown in Figure 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.

CAUTION: Avoid damage to gas control. Hold gas control with wrench when connecting it to gas piping and/or fittings.

Approved Flexible Gas Hose (if allowed by local codes)

Gas Control

103449

Figure 13 - Gas Connection

* Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer.

See Accessories, page 23.

**Minimum inlet pressure for purpose of input adjustment.

Continued

Page 12

DESA INTERNATIONAL

O S

UNVENTED NATURAL GAS LOG HEATER

INSTALLATION

Continued

CHECKING GAS CONNECTIONS

WARNING: Test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once.

WARNING: Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

Pressure Testing gas Supply Piping system

Test Pressures In Excess Of 1/2 PSIG

1. Disconnect heater and its individual manual 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 manual shutoff valve was connected.

3. Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter.

4. Check all joints of gas supply piping system. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak.

5. Correct all leaks at once.

6. Reconnect heater and manual shutoff valve to gas supply . Check reconnected fittings for leaks.

Test Pressures Equal To or Less Than 1/2 PSIG

1. Close manual shutoff valve (see Figure 14).

2. Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter.

3. Check all joints from gas meter to manual shutoff valv e (see Figure 15). Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak.

4. Correct all leaks at once.

Open

Manual Shutoff Valve

Figure 14 - Manual Shutoff Valve

Manual Shutoff Valve

Gas Meter

POSI

Closed

Pressure Testing Heater Gas Connections

1. Open manual shutoff valve (see Figure 14).

2. Open main gas valve located on or near gas meter.

3. Make sure control knob of heater is in the OFF position.

4. Check all joints from manual shutoff valve to gas control (see Figure 15). Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak.

5. Correct all leaks at once.

6. Light heater (see Operating Heater, pages 14 through 16). Check all other internal joints for leaks.

7. Turn of f heater (see To Turn Off Gas to Appliance, page 15).

Gas Control Location

Figure 15 - Checking Gas Joints

103449

Page 13

OWNER’S MANUAL

INSTALLATION

Continued

INSTALLING LOGS

WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury.

Each log is marked with a number. These numbers will help you identify the log when installing. It is very important to install these logs exactly as instructed. Do not modify logs. Only use logs supplied with heater.

1. Place front logs (#1L and #1R) on top of the grate. Make sure the notches in the bottom of the logs fit over the grate prongs (see Figure 16). Push back of logs flush with metal grate bar. 18" model has only one front log.

2. Rest bottom middle log (#2) behind metal posts on front burner . Make sure the grooves in the bottom of the log fit over the grate. Bring the log forward next to the metal posts. The pegs on the log must be on top (see Figure 17).

3. Slide the grooves in the back of the rear log (#3) against the rear grate prongs. Make sure the peg on the log is on top (see Figure 18).

4. Place the top middle log (#4) on the bottom middle log (#2). Make sure the pegs of the bottom middle log fit securely in the holes of the top middle log (see Figure 19).

5. Place the crossover log (#5) on the back log and the top middle log. Make sure the peg on the rear log is in the hole in the bottom of the crossover log. The crossover log should fit in the cutout of the top middle log (see Figure 20).

Note:

Front Log (#1L)

Notch

Grate Prongs

Metal Grate Bar

Figure 16- Installing Front Logs (#1L and #1R)

Peg

Groove

Metal Post

Figure 17 - Installing Bottom Middle Log (#2)

Groove in Back of Log

Grate Prong

Rear Burner

Front Log (#1R)

Bottom Middle Log (#2)

Groove

Grate

Peg

Rear Log (#3)

Groove in Back of Log

Top Middle Log (#4)

Hole

Peg

Bottom Middle Log

Peg

Figure 19 - Installing Top Log (#4)

Crossover Log (#4)

Hole

Cutout

Peg

Figure 20 - Installing Crossover Log (#5)

103449

Grate Prong

Figure 18 - Installing Rear Log (#3)

Page 14

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

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 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 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 tur n

the gas control knob. Ne ver 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.

Control Knob

LIGHTING

INSTRUCTIONS

WARNING

• If fireplace has glass doors, never operate this heater with glass doors closed. If you operate heater with doors closed, heat buildup inside fireplace will cause glass to burst. Also if fireplace opening has vents at the bottom, you must open the vents before operating heater.

• You must operate this heater with a fireplace screen in place. Make sure fireplace screen is closed before running heater.

NOTICE: During initial operation of new heater, burning logs will give off a paper-burning smell. Orange flame will also be present. Open damper or window to vent smell. This will only last a few hours.

Note:

Home owners generally prefer to operate their heater with the chimney damper closed. This will put all the heat into the room. However, there may be times you will desire the full flames of the Hi heat setting but will find the heat output excessive. You can open the chimney damper (if you have one) fully or partially to release some of the heat.

WARNING: Damper handle will be hot if heater has been running.

1. STOP! Read the safety information, column 1.

2. Make sure manual shutoff valve is fully open.

3. Set selector switch in the OFF position.

Flame Adjustment Knob

WARNING: Burners will come on automatically within one minute when the selector switch is in the ON position after the pilot is lit.

4. Press in and turn control knob clockwise to the OFF position (see Figure 21).

5. Wait f ive (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, column 1. If you don’t smell gas, go to the next step.

6. Press in and turn control knob counterclockwise to the PILOT position. Press in control knob for five (5) seconds (see Figure 21).

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 less. This will allo w air to bleed from the gas system.

7. With control knob pressed in, press and release ignitor button. This will light pilot. The pilot is attached to the front burner. If needed, keep pressing ignitor button until pilot lights.

Note:

If pilot does not stay lit, contact a qualified service person or gas supplier for repairs. Until repair s are made, light pilot with match. T o light pilot with match, see Manual Light- ing Procedure, page 15.

8. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob.

• If control knob does not pop out when

released, contact a qualified service person or gas supplier for repairs.

Note:

If pilot goes out, repeat steps

4 through 8.

Pilot Burner

Ignitor Electrode

Ignitor Button

Figure 21 - Control Knob and Ignitor Button Location

Selector Switch in OFF Position

AUTO OFF ON

Figure 22 - Pilot

103449

Page 15

OWNER’S MANUAL

OPERATING HEATER

Continued

9. Slightly push in and turn control knob counterclockwise to the ON position.

10. Wait one minute and switch selector switch to the ON position to light burners.

11. Set flame adjustment knob to any level between HI and LO.

CAUTION: Do not try to adjust heating levels by using the manual shutoff valve.

WARNING: Make sure the selector switch is in the OFF position when you are away from home for long periods of time. Heater will come on automatically with selector switch in the ON position.

TO TURN OFF GAS TO

APPLIANCE

Shutting Off Heater

1. T urn control knob clockwise to the OFF position.

2a. Set selector switch in the OFF position 2b. If Using Optional Hand-Held Re-

mote: Set selector switch in the OFF position to keep from draining battery .

Shutting Off Burners Only (pilot stays lit)

You may shut off the burners and keep the pilot lit by doing one of the following:

• Turn control knob clockwise

to the PILOT position.

• Use remote control manual OFF button.

• Set selector switch in the OFF position.

MANUAL LIGHTING

PROCEDURE

1. Follow steps 1 through 6 under Lighting Instructions, page 14.

2. Depress control knob and light pilot with match.

3. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. Now follow steps 9 through 11, column 1.

OPTIONAL REMOTE

OPERATION

Note:

All remote control accessories must be purchased separately (see Accessories, page 23). Follow instructions included with the remote control.

Thermostat Control Operation

(Optional GHRCT Only) The thermostat control setting on the remote control unit can be set to any comfort level between HI and LO. The burners will turn on and off automatically to maintain the comfort level you select. The ideal comfort setting will vary by household depending upon the amount of space to be heated, the output of the central heating system, etc.

For wall thermostat operation, follow instruction supplied with thermostat accessory GWMT1. For wall switch operation follow instructions supplied with GWMS2.

NOTICE: You must light the pilot before using the hand-held remote control unit. See

Instructions

1. After lighting, let pilot flame burn for

about one minute. Turn control knob to ON position. Adjust flame adjustment knob anywhere between HI and LO. Slide the selector switch to the REMOTE position. ers may light if hand-held remote ON button was on when selector switch was last turned off. You can now turn the burners on and off with the handheld remote control unit.

on page 14.

Note:

Lighting

The burn-

IMPORTANT:

lector switch in the REMOTE position when the pilot is not lit. This will drain the battery.

IMPORTANT:

ON/OFF buttons on the hand-held remote control unit for up to 3 seconds to assure proper operation.

Do not leave the se-

Be sure to press the

GHRC Operation:

2a. Press the ON/OFF button to turn the

burners on and off. When turning burners off, the pilot will remain lit.

GHRCT Operation:

2b. Select the MAN (manual) or AUTO

button on the hand-held remote control unit (see Figure 24, page 16).

• In manual mode, turn burners on or off by pressing the ON or OFF buttons on the hand-held remote control unit.

• In auto mode, the room temperature is controlled by the thermostat in the hand-held remote control unit. To increase the room temperature, press the top arrow of the TEMP button. To lower room the temperature, press the bottom arrow of the TEMP b utton. At higher settings the heater will run longer.

IMPORTANT:

has been specially engineered to take an air temperature sample every 5.5 minutes in the auto mode. It will not respond immediately to the temperature setting being turned up or down.

IMPORTANT:

mote control unit must be near the heater. Do not keep the hand-held remote control unit too close to the heater. The thermostat on the hand-held remote control unit will heat up too quickly and turn the heater off.

This remote contr ol

The hand-held re-

103449

Continued

Page 16

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

OPERATING HEATER

Continued

4. To turn the burners off when operating in the manual mode, press the OFF button. If operating in the auto mode, press the MAN button, then press the OFF button. The pilot will

3. Use the ST A TUS button on the handheld remote control unit to see the operation mode being used and the temperature setting selected. A red

remain lit.

IMPORTANT:

To turn the pilot off, manually turn the control knob on the heater to the OFF position.

light will come on beside the operation mode being used when the status button is pressed.

Control Knob in On Position

Figure 23 - Setting the Selector Switch, Control Knob, and Flame Adjustment Knob for Remote Operation

Flame Adjustment Knob

Selector Switch in Remote Position

ON OFF REMOTE

Shows Temperature Setting

Increases Room

Temperature

Decreases Room

Temperature

Allows Burners to be Turned On and Off with the HandHeld Remote Unit.

TEMP

MAN ON

Turns Burners

On and Off

Shows Current

Operation Mode

The log heater will automatically cycle between pilot and the heat setting that

AUTO OFF

STATUS

has been selected.

Figure 24 - Thermostat Hand-Held Remote Control Unit Selections (GHRCT only)

103449

Page 17

OWNER’S MANUAL

INSPECTING BURNERS

Check pilot flame pattern and burner flame patterns often.

PILOT FLAME PATTERN

Figure 25 shows a correct pilot flame pattern. Figure 26 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 26

• turn heater off (see To Turn Off Gas to Appliance, page 15)

• see Troubleshooting, pages 19 through 21

Pilot Burner

Thermocouple

FRONT BURNER FLAME PATTERN

Figure 27 shows correct front burner flame pattern. Figure 28 shows incorrect front burner flame pattern. The incorrect burner flame pattern shows yellow tipping at top of blue flame.

WARNING: If yellow tipping occurs, your heater could produce increased levels of carbon monoxide. If front burner flame pattern shows yellow tipping, follow instructions at bottom of this page. Yellow flame on rear burner is normal.

NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles are burned by heater, causing brief patches of orange flame.

If front burner flame pattern is incorrect, as shown in Figure 28

• turn heater off (see To Turn Off Gas to Appliance, page 15)

• see Troubleshooting, pages 19 through 21

Figure 25 - Correct Pilot Flame Pattern

Pilot Burner

Figure 26 - Incorrect Pilot Flame Pattern

Thermocouple

Figure 27 - Correct Front Burner Flame Pattern

Yellow Tipping At Top of Blue Flame

Figure 28 - Incorrect Front Burner Flame Pattern

103449

Page 18

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

CLEANING AND MAINTENANCE

WARNING: Turn off heater

and let cool before cleaning.

CAUTION: You must keep control areas, burners, 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.

CLEANING BURNER INJECTOR HOLDER AND PILOT AIR INLET HOLE

The primary air inlet holes allow the proper amount of air to mix with the gas. This provides a clean burning flame. Keep these holes clear of dust, dirt, 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 2,500 hours of operation or every three months.

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. Allow the unit to cool for at least thirty minutes.

2. Inspect burner, pilot, and primary air inlet holes on injector holder for dust and dirt (see Figure 29).

3. Blow air through the ports/slots and holes in the burner.

4. Check the injector holder located at the end of the burner tube again. Remove any large particles of dust, dirt, lint, or pet hairs with a soft cloth or vacuum cleaner nozzle.

5. Blow air into the primary air holes on the injector holder.

6. In case any large clumps of dust have now been pushed into the burner repeat steps 3 and 4.

Clean the pilot assembly also. A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly. There is a small pilot air inlet hole about two inches from where the pilot flame comes out of the pilot assembly (see Figure 30). With the unit off, lightly blow air through the air inlet hole. You may blow through a drinking straw if compressed air is not available.

Injector Holder

Ports/Slots

Burner Tube

Primary Air Inlet Holes

Figure 29 - Injector Holder On Outlet Burner Tube

Pilot Air Inlet Hole

Pilot Assembly

Figure 30 - Pilot Inlet Air Hole

LOGS

• If you remove logs for cleaning, refer to Installing Logs, page 13, to properly replace logs.

• Replace log(s) if broken or chipped (dime-sized or larger).

103449

Page 19

OWNER’S MANUAL

TROUBLESHOOTING

Note:

For additional help, visit DESA

International’s technical service web site at www.desatech.com.

Note:

All troubleshooting items are listed in

order of operation.

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

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

POSSIBLE CAUSE

1. Ignitor electrode not connected to ignitor cable

2. Ignitor cable pinched or wet

3. Piezo ignitor nut is loose

4. Broken ignitor cable

5. Bad piezo ignitor

6. Ignitor electrode positioned wrong

7. Ignitor electrode broken

1. Gas supply turned off or manual shutoff valve closed

2. Control knob not in PILOT position

3. Control knob not pressed in while in PILOT position

4. Air in gas lines when installed

5. ODS/pilot is clogged

6. Gas control setting is not correct

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

REMEDY

1. Reconnect ignitor cable

2. Free ignitor cable if pinched by any metal or tubing. Keep ignitor cable dry

3. Tighten nut holding piezo ignitor to base panel of log set. Nut is located behind base panel.

4. Replace ignitor cable

5. Replace piezo ignitor

6. Replace ignitor

7. Replace ignitor

1. Turn on gas supply or open manual 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. Clean ODS/pilot (see Cleaning and Maintenance, page 18) or replace ODS/ pilot assembly

6. Replace gas control

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

103449

1. Control knob not fully pressed in

2. Control knob not pressed in long enough

3. Manual shutoff valve not fully open

4. 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

5. Thermocouple connection loose at control valve

6. Thermocouple damaged

7. Gas control damaged

www.desatech.com

1. Press in control knob fully

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

3. Fully open manual shut-off valve

4. A) Contact local propane gas company B) Clean ODS/pilot (see Cleaning and Maintenance, page 18) or replace ODS/ pilot assembly

5. Hand tighten until snug, then tighten 1/4 turn more

6. Replace thermocouple

7. Replace gas control

Continued

Page 20

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

TROUBLESHOOTING

Continued

OBSERVED PROBLEM

One or both burners do not light after ODS/ pilot is lit

Delayed ignition of one or both burners

Burner backfiring during combustion

Yellow flame in front burner during burner combustion

POSSIBLE CAUSE

1. Inlet gas pressure is too low

2. Burner orifice(s) clogged

3. Mislocated crossover tube

4. Burner orifice(s) diameter is too small

5. Remote selector in OFF position

6. Wire disconnected from gas control

1. Manifold pressure is too low

2. Burner orifice(s) clogged

3. Mislocated crossover tube

1. Burner orifice is clogged or damaged

2. Damaged burner

3. Gas control defective

1. Not enough air

2. Gas control defective

REMEDY

1. Contact local natural gas company

2. Clean burner(s) (see Cleaning and Main- tenance, page 18) or replace burner orifice(s)

3. Contact qualified service person

4. Replace burner orifice(s)

5. Put remote selector in ON position

6. See Wiring Diagram, page 22

1. Contact local natural gas company

2. Clean burner(s) (see Cleaning and Main- tenance, page 18) or replace burner orifice(s)

3. Contact qualified service person

1. Clean burner (see Cleaning and Mainte- nance, page 18) or replace burner orifice

2. Replace damaged burner

3. Replace gas control

1. Check burner(s) for dirt and debris. If found, clean burner(s) (see Cleaning and Maintenance, page 18)

2. Replace gas control

Slight smoke or odor during initial operation

Moisture/condensation noticed on windows

Heater produces a whistling noise when burners are lit

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

Remote does not function

1. Residues from manufacturing processes and logs curing

1. Not enough combustion/ventilation air

1. Turning control knob to HI position when burners are cold

2. Air in gas line

3. Air passageways on heater blocked

4. Dirty or partially clogged burner orifice(s)

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

1. Battery is not installed. Battery power is low

www.desatech.com

1. Problem will stop after a few hours of operation

1. Refer to Air for Combustion and Venti- lation requirements (pages 4 through 6)

1. Turn control knob to LO position and let warm up for a minute

2. Operate burners until air is removed from line. Have gas line checked by local natural gas company

3. Observe minimum installation clearances (see pages 7 through 9)

4. Clean burners (see Cleaning and Main- tenance, page 18) or replace burner orifice(s)

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

1. Replace 9-volt batteries in receiver and remote control

103449

Page 21

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.

OWNER’S MANUAL

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. These odors will disappear over time.

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

OBSERVED PROBLEM

Heater produces a clicking/ticking noise just after burners are 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, cleaners, chemicals, new carpet, etc. (See ment above)

2. Low fuel supply

3. Gas leak. See Warning statement

above

1. Not enough fresh air is available

2. Low line pressure

3. ODS/pilot is partially clogged

1. Gas leak. See Warning statement

above

2. Gas control defective

IMPORTANT

state-

REMEDY

1. This is common with most heaters. If noise is excessive, contact qualif ied service person

1. Open window to 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 gas company

3. Clean ODS/pilot (see Cleaning and Maintenance, page 18)

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

2. Replace gas control

Gas odor during combustion

Log set cycles to pilot, but room temperature drops to a lower than ideal level before log set comes back on

103449

1. Foreign matter between control valve and burner

2. Gas leak. See Warning statement

above

1. Hand-held remote control unit needs to be moved away from heater

www.desatech.com

1. Take apart gas tubing and remove foreign matter

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

1. Move hand-held remote control unit farther away from the heater

Page 22

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

SPECIFICATIONS

18" Variable 24" Variable 30" Variable

Btu (Variable) 16,000/26,000 20,000/33,000 21,500/36,000 Type Gas Natural Gas Only Natural Gas Only Natural Gas

Only Ignition Piezo Piezo Piezo Manifold Pressure 3.4" W.C. 3.4" W.C. 3.4" W.C. Inlet Gas

Pressure (in. of water)

Maximum 10.5" 10.5" 10.5" Minimum* 5" 5" 5"

Shipping Weight 32 lbs. 34 lbs. 36 lbs. * For purpose of input adjustment

WIRING DIAGRAM

On Off

Remote

Thermopile

Receiver

Black

Red

White

TPTH TH

Gas Control

TPTH

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 International’s Technical Service Department at 1-800-323-5190.

When calling DESA International, have ready

• your name

• your address

• model number of your heater

• how heater was malfunctioning

• type of gas used (propane or natural gas)

• purchase date Usually, we will ask you to return the defec-

tive part to the factory.

PARTS NOT UNDER WARRANTY

Contact authorized dealers of this product. If they can’t supply original replacement part(s), call DESA International’s Parts Department at 1-800-972-7879 for referral information.

When calling DESA International, have ready

• model number of your heater

• the replacement part number

SERVICE HINTS

When Gas Pressure Is Too Low

• pilot will not stay lit

• burners will have delayed ignition

• heater will not produce specified heat

When Gas Quality Is Bad

• pilot will not stay lit

• burners will produce flames and soot

• heater will backfire when lit You may feel your gas pressure is too low or

gas quality is bad. If so, contact your local natural gas supplier.

TECHNICAL SERVICE

You may have further questions about installation, operation, or troubleshooting. If so, contact DESA International’s Technical Service Department at 1-800-DESA LOG (1-800-337-2564).

You can also visit DESA International’s technical services web site at

www.desatech.com.

103449

Page 23

OWNER’S MANUAL

,,,,,,,,,,,,,,,,,

ACCESSORIES

Purchase these heater accessories from your local dealer. If they can not supply these accessories, call DESA International’s Parts Department at 1-800-972-7879 for referral information. You can also write to the address listed on the back page of this manual.

MANUAL SHUTOFF VALVE - GA5010

For all models. Manual shutoff valve with 1/8" NPT tap. Fits 1/2" NPT pipe.

FIREPLACE HOOD

Black - GA6050 Brass - GA6052 Antique Brass - GA6053

For all models. Helps deflect heat away from mantel or wall above fireplace.

LAVA ROCK - GA6060

(Not Shown)

For all models. Order when additional rock is desired. (3 lb. bag)

DAMPER CLAMP - GA6080

(Not Shown)

Permanently opens chimney flue damper for vented operation. Can be used only with non-thermostat accessories.

103449

TEMP

MAN

AUTO

ONLO

OFF

STATUS

RECEIVER AND HAND-HELD THERMOSTAT REMOTE CONTROL KIT - GHRCT

For all models. Allows the gas log heater to be operated in a manually or thermostatically controlled mode. You can turn the gas log heater on and off without ever leaving the comfort of your easy chair.

RECEIVER AND HAND-HELD REMOTE CONTROL KIT GHRC

For all models. Allows the gas log heater to be turned on and off by using a hand-held remote control.

WALL-MOUNT ON/OFF SWITCH - GWMS2

(Not Shown)

For all models. Allows the gas log heater to be turned on and off with a wall switch.

WALL-MOUNT THERMOSTAT SWITCH - GWMS1

(Not Shown)

For all models. The desired comfort setting can be selected on the wall thermostat and the log heater will automatically cycle from pilot to the heat setting selected.

VENT-FREE LOGMATE

STOVE - SVFBC

For models VL18N/P, VL18NT(A), VL18PT(A), VL18NV, VL18PV, VS18NV(B), VS18PV(B), VS18NT(A), VS18PT(A), CF18N/P, CF18NT(A), CF18PT(A), CFS18NV(B), CFS18PV(B), VS18NR, CFS18NR.

VENT-FREE LOGMATE

FIREBOXES

Available in 32", 36", and 42" models. May be paired with the logs listed below. Circulating fireboxes feature louvers and an optional blower. Non-circulating, smooth face models are ideal for custom trim applications such as stone or marble.

FB32C (CIRCULATING), FB32NC (NONCIRCULATING) SERIES

For 18" and 24" models: VS18NR, CFS18NR, VL18N/P, VL24N/P, VL18NT(A),VL18PT(A), VL24NT(A), VL24PT(A), VL18NV, VL18PV, VL24NV, VL24PV, VS18NV(B), VS18PV(B), VS24NV(A, B), VS24PV(A, B), VS18NT(A), VS18PT(A), VS24NT(A), VS24PT(A), CF18N/P, CF24N/P, CF18NT(A), CF18PT(A), CF24NT(A), CF24PT(A), CS18NV(B), CS18PV(B), CS24NV(A, B), CS24PV(A, B).

FB36CA, FB42C SERIES (CIRCULATING), FB36NCA, FB42NC SERIES (NON-CIRCULATING)

For all 18" and 24" models listed above plus the following 30" models: VS18NR, CFS18NR, VL30N/P, VL30NT(A), VL30PT(A), VL30NV, VL30PV, VS30NV(A, B), VS30PV(A,B), VS30NT(A), VS30PT(A), CF30N/P, CF30NT(A), CF30PT(A), CS30NV(A, B), CS30PV(A, B).

Page 24

DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

ILLUSTRATED PARTS BREAKDOWN

VARIABLE CONTROL CFS18NR VS18NR VS24NR VS30NR

10-2

10-1

103449

Page 25

OWNER’S MANUAL

PARTS LIST

CFS18NR VS18NR VS24NR VS30NR

KEY PART NUMBERS NO.

1L 103580-01 103580-03 Left Front Log (1L) 1 1R 103580-04 103580-02 103580-02 Right Front Log (1R) 1 2 103576-01 103576-02 103576-02 Bottom Middle Log 1 3 103577-02 103577-01 103577-03 Rear Log (#3) 1 4 103578-02 103578-01 103578-03 Top Middle Log (#4) 1 5 103579-02 103579-01 103579-01 Crossover Log 1 6 M11084-26 M11084-26 M11084-26 Screw 6 7 103779-01 103779-01 103779-01 O.D.S. Pilot 1 8 098249-01 098249-01 098249-01 Nut 6 9 103780-01 103780-01 103780-01 Pilot Bracket 1 10 101330-01 101330-05 101330-06 Front Burner Assembly 1 10-1 101008-01 101008-01 101008-01 Crossover Burner Gasket 1 10-2 101007-01 101007-01 101007-01 Crossover Burner 1 11 100999-04 100999-05 100999-06 Rear Burner Assembly 1 12 103984-01 103984-02 103984-03 Base Assembly and Decal 1 13 098271-01 098271-06 098271-03 Ignitor Cable 1 14 102445-01 102445-01 102445-01 Piezo Ignitor 1 15 103588-01 103588-01 103588-01 Heat Shield 1 16 103782-01 103782-01 103782-01 Valve Bracket 1 17 M12461-26 M12461-26 M12461-26 Screw 5 18 103781-01 103781-01 103781-01 Gas Control 1 19 098264-02 098264-02 098264-02 Male Fitting 1 20 103784-02 103784-02 103784-02 Flame Adjustment Knob 1 21 103784-01 103784-01 103784-01 Control Knob 1 22 103587-01CK 103587-01CK 103587-01CK Switch Plate 1 23 M11084-26 M11084-26 M11084-26 Screw 2 24 099387-12 099387-12 099387-12 Pilot Tube 1 25 100609-01 100609-01 100609-01 Pilot Tube 1 26 101004-11 101004-04 101004-05 Read Burner Injector 1 27 101004-11 101004-08 101004-08 Front Burner injector 1 28 103783-01 103783-01 103783-01 Remote Burner Tube 1 29 099998-01 099998-01 099998-01 Switch 1 30 103284-02 103284-02 103284-02 Wiring Harness 1 31 099918-02 099918-02 099918-02 Pilot Regulator 1

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.

VS18NR/CFS18NR

VS24NR VS30NR DESCRIPTION QTY.

103449

PARTS AVAILABLE — NOT SHOWN

100563-01 100563-01 100563-01 Warning Plate 1 103877-01 103877-01 103877-01 Lighting Instructions Plate 1 100565-01 100565-01 100565-01 Warning Plate Fastener 1 100639-01 100639-01 100639-01 Caution Decal 1 101137-02 101137-02 101137-02 Hardware Kit 1 101416-27 101416-27 101416-27 Information Video 1 GA6060 GA6060 GA6060 Lava Rock 1

Page 26

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 NATURAL GAS LOG HEATERS

DESA International warrants this product to be free from defects in materials and components for four (4) years and five (5) years on stainless steel burners from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions. There is no warranty on the batteries. 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 Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product and/or DESA International 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 FOUR (4) YEARS ON ALL COMPONENTS AND FIVE (5) YEARS ON STAINLESS STEEL BURNERS FROM THE DATE OF FIRST PURCHASE; AND DESA INTERNATIONAL’S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA INTERNATIONAL 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:

INTERNATIONAL

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

www.desatech.com

103449 01

NOT A UPC

103449-01 Rev. D 02/99