Desa SBJ24VNA, SBJ24VPA, SBJ18VPA, SMA24VNA, SMA24VPA User Manual

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Desa SBJ24VNA, SBJ24VPA, SBJ18VPA, SMA24VNA, SMA24VPA User Manual

UNVENTED (VENT-FREE) GAS LOG HEATER OWNER’S OPERATION AND INSTALLATION MANUAL

 

ANSI Z21.11.2a-2003

 

 

ANSI Z21.60-2003

 

SBJ24VNA, SBJ24VPA

APPROVED

SMA24VNA, SMA24VPA

SBJ18VNA, SBJ18VPA

 

SMA18VNA, SMA18VPA

Vent-free Models Also Design-Certified

As Vented Decorative Appliances

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 touchany electrical switch;do notuse any phone in your building.

Immediatelycallyourgassupplierfromaneighbor’s phone. Follow the gas supplier’s instructions.

If you cannot reach your gas supplier, call the fire department.

Installationandservicemustbeperformedbyaqualified installer, service agency or the gas supplier.

Save this manual for future reference. For more information, visit www.desatech.com

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or propertydamage.Refertothismanualforcorrectinstallation 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 a listed ventless firebox enclosure. It is design-certified for these installations in accordance with ANSI 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 beprovided.RefertoAirforCombustionandVentilation section on page 6 of this manual.

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

This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not convertible for use with other gases.

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

TABLE OF CONTENTS

Safety Information ...............................................

3

Wiring Diagram..................................................

 

20

Product Identification...........................................

5

Cleaning and Maintenance................................

 

21

Local Codes ........................................................

5

Troubleshooting.................................................

 

22

Unpacking ...........................................................

5

Specifications ....................................................

 

26

Optional Remote Control Accessories.................

5

Replacement Parts............................................

 

26

Product Features.................................................

5

Service Hints .....................................................

 

26

Air For Combustion and Ventilation.....................

6

Technical Service ..............................................

 

26

Installation ...........................................................

8

Accessories.......................................................

 

27

Operating Heater...............................................

16

Illustrated Parts Breakdown and Parts List .......

28

Inspecting Burner ..............................................

20

Warranty Information...........................

Back Cover

2

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114744-01B

SAFETY INFORMATION

IMPORTANT: Read this owner’s manualcarefullyandcompletely before trying to assemble, operate or service this log set.

Improper use of this log set can cause serious injury or death from burns, fire, explosion, electrical shock and carbon monoxide poisoning.

DANGER:Carbonmonoxide

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 log set may not be working properly. Get fresh air at once! Have log set 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 & Propane/LPGas: Natural&Propane/LP gas are 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.

Makecertainyoureadandunderstandallwarnings. Keep this manual for reference. It is your guide to safe and proper operation of this log set.

WARNING: Any change to this log set or its controls can be dangerous.

WARNING:Donotuseablowerinsert,heatexchangerinsertor otheraccessorynotapprovedfor use with this appliance.

WARNING:Thisapplianceis equipped with (natural or propane/LP) gas. Field conversion is not permitted.

WARNING:Donotallowfans toblowdirectlyintothefireplace. Avoidanydraftsthatalterburner

flame patterns. Ceiling fans can create drafts that alter burner

flame patterns. Altered burner patterns can cause sooting.

WARNING: Do not place log scraps or lava rocks on burner

Due to high temperatures, the applianceshouldbelocatedout oftrafficandawayfromfurniture and draperies.

Do not place clothing or other flammable material on or near the appliance. Never place any objects on the heater.

Heater assembly 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 room with appliance. When using the hand-held remote accessory, keep selector switch in the OFF positiontopreventchildrenfrom turning on burner with remote.

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

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3

SAFETY INFORMATION

Continued

Keep the appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids.

Solidfuelsshallnotbeburnedin afireplaceinwhichanunvented room heater installed.

Children and adults should be alertedtothehazardofhightemperatureandshouldstayawayto avoid burns or clothing ignition.

1.This appliance, as supplied, 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 the structure.Locate propane/LP supply tank(s) outdoors (propane/LP units only).

3.If you smell gas

shut off gas supply

do not try to light any appliance

donottouchanyelectricalswitch;donotuse any phone in your building

immediately call your gas supplier from a neighborʼs phone. Follow the gas supplierʼs instructions

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

4.This heater shall not be installed in a bedroom orbathroom,unlessinstalledasaventedappliance.SeeInstalling Damper ClampAccessory for Vented Operation, page 12.

5.Beforeinstallinginasolidfuelburningfireplace, thechimneyflueandfireboxmustbecleanedof soot,creosote,ashesandloosepaintbyaqualified chimney cleaner. Creosote will ignite if highly heated.Inspectchimneyfluefordamage.Ifdamaged, repair flue before operating appliance.

6.Iffireplacehasglassdoors,neveroperatewith glass doors closed, If you operate heater with doorsclosed,heatbuildupinsidefireplacewill cause glass to burst.Also if fireplace opening has vents at the bottom, you must open the vents before operating heater.

7.Topreventthecreationofsoot,followtheinstructions in Cleaning and Maintenance, page 21.

8.Before using furniture polish, wax, carpet cleaner or similar products, turn heater off. If heated, the vapors from these products may createawhitepowderresiduewithintheburner box or on adjacent walls and furniture.

9.This heater needs fresh, outside air ventilation to run properly this heater has an Oxygen Depletion Sensing (ODS) safety shutoff system. TheODSshutsdowntheheaterifenoughfresh air is not available. See Air Combustion and Ventilation page 6. If the heater keeps shutting off, see Troubleshooting, page 22.

10.Do not run heater

where flammable liquids or vapors are used or stored

under dusty conditions

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

12.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 andtoreplaceanypartofthecontrolsystemand any gas control which has been under water.

13.Do not operate heater if any log is broken. Do not operate heater if a log is chipped (dimesize or larger).

14.Turn heater off and let cool before servicing, installing or repairing. Make sure the selector switch is in the OFF position. Only a qualified service person should install, service or repair heater.

15.Make sure the selector switch is in the OFF position when you are away from home for long periods of time.

16.Remote-ready heaters shall not be connected to any external electrical source.

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

18.To prevent performance problems, do not use propane/LPtank(s) of less than 100 lb. capacity (propane/LP units only).

19.Provide adequate clearances around air openings.

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.

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114744-01B

PRODUCT

IDENTIFICATION

 

 

Log Set

Piezo

 

 

Ignitor

Flame

Chassis

Control

Adjustment

Assembly

Knob

Knob

 

 

 

Figure 1 - Product Identification

LOCAL CODES

Install and use the heater with care. Follow all

local codes. In the absence of local codes, use the

latest edition of theNational 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.

 

Battery march park

 

Quincy, MA 02269

Note: Where listed vented decorative logs are

required, thermostat operations is not permitted.

The installation of appliances designed for manu-

factured home (U.S. only) or mobile home instal-

lation must conform with the Standard CAN/CSA

Z240 MH, Standard, Title 24 CFR, Part 3280, in

the United States or when such a Standard is not

applicable, ANSI/NCSBCS A225.1/NFPA 501A

Manufactured Home Installations Standard.

State of Massachusetts: The installation

must be made by a licensed plumber or

gas fitter in the Commonwealth of Mas-

sachusetts.

 

 

Sellers of unvented propane or natural

gas-fired supplemental room heaters shall

provide to each purchaser a copy of 527

CMR 30 upon sale of the unit.

 

Vent-free gas products are prohibited for

bedroom and bathroom installation in the

Commonwealth of Massachusetts.

UNPACKING

CAUTION:Donotremovethe data plates from the grate assembly. The data plates contain important warranty and safety information.

1.Remove log set assembly from carton. Note: Do not pick up assembly by logs. This could damage the unit. Always handle assembly by grate.

2.Remove all protective packaging applied to log set for shipment.

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

OPTIONAL REMOTE

CONTROL ACCESSORIES

There are four optional remote controls that can

be purchased separately:

Wall switch

Hand-held ON/OFF remote

Wall thermostat

Hand-held thermostat remote

See Accessories, page 27

Thewallthermostatorhand-heldthermostatmaynot

be used where vented decorative listings is required.

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.Heatisgeneratedbybothrealisticflames

and glowing coals. This heater is designed for

vent-free operation with flue damper closed. It

has been tested and approved to ANSI 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 (ANSI Z21.60) product by

opening the flue damper.

SAFETY DEVICE

This heater has a pilot with an Oxygen Deple-

tion Sensing (ODS) safety shut off system. The

ODS/pilot is a required feature for vent-free room

heaters.TheODS/pilot shutsofftheheaterifthere

is not enough fresh air.

PIEZO IGNITION SYSTEM

This heater has a piezo ignitor. This system re-

quires no matches, batteries or other sources to

light heater.

 

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5

AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall not be installed in confined space or unusually tight construction unless provisions are provided for adequate combustionandventilationair.Readthe following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.

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

While it is good to make your home energy efficient, your home needs to breathe. Fresh air must enter your home.All fuel-burning appliances need fresh air for proper combustion and ventilation.

Exhaust fans, fireplaces, clothes dryers and fuel burning appliances draw air from the house to operate. You must provide adequate fresh air for these appliances. This will insure proper venting of vented fuel-burning appliances.

PROVIDING ADEQUATE VENTILATION

The following are excerpts from National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three following ventilation classifications:

1.Unusually Tight Construction

2.Unconfined Space

3.Confined Space

The information on pages 6 through 8 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

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

Unusually tight construction is defined as construction where:

a.Walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of one perm (6 x 10-11 kg per pa-sec-m2) or less with openings gasketed or sealed and

b.weather stripping has been added on openable windows and doors and

c.caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical and gas lines and at other openings.

If your home meets all of the three criteria above, you must provide additional fresh air. See Ventilation Air From Outdoors, page 6.

If your home does not meet all of the three criteria above, proceed to Determining Fresh-Air Flow For Appliance Location.

Confined and Unconfined Space

The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a space whose volumeislessthan50cubicfeetper1,000Btuperhour (4.8 m3 per kw) of the aggregate input rating of all appliancesinstalledinthatspaceandanunconfined space as a space whose volume is not less than 50 cubicfeetper1,000Btuperhour(4.8m3 perkw)of theaggregateinputratingofallappliancesinstalled 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 thereareodorlesspassagewaysorventilationgrills between them.

DETERMINING FRESH-AIR FLOW FOR APPLIANCE 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 appliance plus any adjoining rooms with doorlesspassagewaysorventilationgrillsbetween the rooms.

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114744-01B

AIR FOR COMBUSTION AND VENTILATION

Continued

1.Determine the volume of the space (length x width x height).

Length x Width x Height =________ cu. ft. (volume of space)

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

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

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

____________(volume of space) x 20 = (Maximum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximum Btu/Hr the space can support)

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

Vent-free appliance

_________Btu/Hr

Gas water appliance*

_________Btu/Hr

Gas furnace

_________Btu/Hr

Vented gas appliance

_________Btu/Hr

Gas fireplace logs

_________Btu/Hr

Other gas appliances*

+_________Btu/Hr

Total

=_________Btu/Hr

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

Example:

40,000

Gas water appliance

_________Btu/Hr

Vent-free appliance

33,000

+_________Btu/Hr

Total

73,000

=_________Btu/Hr

4.Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.

___________ Btu/Hr (maximum the space can support)

____________Btu/Hr (actual amount of Btu/Hr used)

Example: 51,200 Btu/Hr (maximum the space can support)

73,000 Btu/Hr (actual amount of Btu/Hr used)

The space in the previous example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows:

A.Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From Inside Building.

B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 8.

C.Install a lower Btu/Hr appliance, if lower Btu/Hr size makes room unconfined.

If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.

WARNING:Iftheareainwhich the appliance 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 byoneofthemethodsdescribed in the National Fuel Gas Code, ANSIZ223.1/NFPA54Section5.3 or applicable local codes.

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 on page 8). 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.

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AIR FOR COMBUSTION AND VENTILATION

 

Continued

 

 

12"

Ventilation

 

Ventilation Grills

Grills

 

Into Adjoining

Or

Into Adjoining Room,

Room,

Option 2

Remove

Option 1

 

Door into

 

 

 

 

Adjoining

 

 

Room,

 

 

Option

 

 

3

 

 

 

12"

Figure 2 - Ventilation Air from Inside Building

Ventilation Air From Outdoors

Provideextrafreshairbyusingventilationgrillsor ducts.You must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. Follow the

National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3,Air for Combustion and Ventilation for required size of ventilation grills or ducts.

IMPORTANT: Do not provide openings for inlet or outlet air into attic if attic has a thermostatcontrolledpowervent.Heatedairenteringtheattic will activate the power vent.

 

Outlet

Ventilated

 

Attic

 

Air

 

 

Outlet

 

 

Air

 

To Attic

 

 

 

 

To

 

 

Crawl

Inlet

 

Space

 

 

Air

 

 

 

Inlet Air

Ventilated

 

Crawl Space

 

 

Figure 3 - Ventilation Air from Outdoors

INSTALLATION

NOTICE: This heater is intended for use as supplemental heat. Use this heater along with your primary heating system. Do not installthisheaterasyourprimary heating source. If you have a centralheatingsystem,youmay run system's circulating blower whileusingheater.Thiswillhelp circulatetheheatthroughoutthe house. In event of a power outage, you can use this heater as your primary heat source.

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

NOTICE:Stateorlocalcodesmay onlyallowoperationofthisappliance in a vented configuration.

Check your state or local codes.

WARNING: Make sure the selectorswitchisintheOFFposition before installing heater.

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 qualifiedchimneycleaner.Creosotewilligniteifhighlyheated.A dirtychimneyfluemaycreateand distribute soot within the house.

Inspectchimneyfluefordamage.

If damaged, repair flue damper before operating appliance.

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INSTALLATION

Continued

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 heat-resistant sealant. Do not seal chimney flue damper.

WARNING: Never install the heater

in a bedroom or bathroom unless installed as a vented appliance, see page 12

in a recreational vehicle

where curtains, furniture, clothing or other flammable objectsarelessthan42inches from the front, top or sides of 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, but not limited to, tobacco smoke, aromatic candles, cleaning fluids, oil or kerosene lamps, etc..) in the air exist, may discolor walls or cause odors.

IMPORTANT: Vent-free heaters add moisture to theair.Althoughthisisbeneficial,installingheater inroomswithoutenoughventilationairmaycause mildew to form from too much moisture. See Air for Combustion and Ventilation, page 6.

CHECK GAS TYPE

Usethecorrectgastype(naturalorpropane/LP)for your unit. If your gas supply is not correct, do not install in fireplace. Call dealer where you bought the appliance for proper type of appliance.

WARNING: This appliance is equipped for (natural or propane/LP) gas. Field conversion is not permitted.

INSTALLATION AND CLEARANCES FOR VENT-FREE OPERATION

WARNING: Maintain the minimum clearances. If you can, provide greater clearances fromfloor,ceilingandadjoining wall.

MINIMUM FIREPLACE CLEARANCE TO COMBUSTIBLE MATERIALS

LOG SIZE

18", 24"

 

 

SIDE WALL

16"

 

 

CEILING

42"

 

 

FLOOR

5"

 

 

LOG SIZING REQUIREMENTS

 

MINIMUM FIREBOX SIZE

LOG

 

 

FRONT

REAR

SIZE

HEIGHT

DEPTH

WIDTH

WIDTH

18"

17"

14"

24"

20"

24"

17"

14"

28"

22"

 

 

 

 

 

*Measured at 14" depth

Allowadequateclearancesforaccessibilityfor purposes of servicing and proper operation

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

Minimum Clearances For Side Combustible Material, Side Wall and Ceiling

A.Clearances from the side of the fireplace cabinet to any combustible material and wall should follow diagram in Figure 4, page 10.

Example: The face of a mantel, bookshelf, etc.. is made of combustible material must be 4" from the side of the fireplace to the cabinet (see Figure 4, page 10).

B.Clearances from the top of the fireplace opening to the ceiling should not be less than 42 inches.

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9

INSTALLATION

Continued

Example

*

*Minimum 16 inches from Side Wall

Figure 4 - Minimum Clearance for Combustible to Wall

NOTICE: Non thermostat controlled heaters may be used as aventedproduct.Ifso,youmust always run heater with chimney

flue damper open and damper clampinstalled.Ifrunningheater withdamperopen,noncombustiblematerialabovethefireplace opening is not needed. Go to

Installing Damper Clamp Accessory for Vented Operation, page 12.

Minimum Noncombustible Material Clearances

If Not Using Mantel

Note: If using a mantel proceed to If Using Mantel. If not using mantel, follow the information on this page.

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 (24" Models Only). See Figure 5 for minimum clearances.

Noncombustible

 

Requirements for

Material Distance (A)

 

Safe Installation

12" or more

 

Noncombustible

 

 

material OK.

Between 8" and 12"

 

24" Models:

 

 

Install fireplace hood

 

 

accessory (GA6050,

 

 

GA6052, GA6053, see

 

 

Accessories, page 27).

 

 

18" Model: Noncom-

 

 

bustible material OK.

Less than 8"

 

Noncombustible

 

 

material must be

 

 

extended to at least 8".

 

 

See Between 8" and

 

 

12", above. If you

 

 

cannotextendmaterial,

 

 

you must operate

 

 

heaterwithfluedamper

 

 

open and damper

 

 

clamp installed

Heat Resistant

 

 

 

 

 

 

 

 

 

 

 

 

Material

 

 

 

 

 

 

 

 

(A)

 

 

 

 

 

Figure 5 - Heat Resistant Material (Slate,

Marble, Tile, etc.) Above Fireplace

If Using Mantel

Youmusthavenoncombustiblematerial(s)abovethe fireplaceopening.Noncombustiblematerials(suchas slate,marble,tile,etc.)mustbeatleast1/2inchthick. With sheet metal, you must have noncombustible material behind it. Noncombustible material must extendatleast8inchesup(forallmodels).Ifnoncombustiblematerialislessthan12",youmustinstallthe fireplacehoodaccessory(24"ModelsOnly).Evenif 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 11, for minimum clearances.

IMPORTANT:Ifyoucannotmeettheseminimum clearances, you must operate heater with chimney flue damper open. Go to Installing Damper Clamp Accessory for Vented Operation, page 12.

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