Desa LSF20PT, SF20PT, LSF20NT, REM20PT, SF30NT User Manual

UNVENTED (VENT-FREE) SOLAR FUSION GAS HEATER SAFETY INFORMATION AND INSTALLATION MANUAL

	RESIDENTIAL MODELS	GARAGE MODELS
	SF20NT, SF20PT,
		LSFG20NT, LSFG20PT,
	LSF20NT, LSF20PT,
		REM20NT, REM20PT,
	VSF20NT, VSF20PT,
		SFG20NT, SFG20PT,
	SF30NT, SF30PT,
		SPC20NT, SPC20PT,
	LSF30NT, LSF30PT,
		VSFG20NT, VSFG20PT
	VSF30NT, VSF30PT

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.

•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 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 5 of this manual.

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

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

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

State of Massachusetts: The installation must be made by a licensed plumber or gas fitter in the Commonwealth of Massachusetts.

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.

TABLE OF CONTENTS

Safety Information ...............................................	3	Troubleshooting.................................................	16
Local Codes ........................................................	4	Technical Service ..............................................	19
Product Identification...........................................	4	Service Publications..........................................	19
Unpacking ...........................................................	4	Service Hints .....................................................	19
Product Features.................................................	4	Specifications ....................................................	20
Air For Combustion and Ventilation.....................	5	Accessories.......................................................	21
Installation ...........................................................	7	Replacement Parts............................................	21
Operating Heater...............................................	12	Parts Central .....................................................	21
Inspecting Heater ..............................................	14	Illustrated Parts Breakdown and Parts List .......	22
Cleaning and Maintenance................................	15	Warranty Information.........................................	24

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SAFETY INFORMATION

WARNING:Thisproductcontainsand/orgenerateschemicals known to the State of California to cause cancer or birth defects or other reproductive harm.

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

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

DANGER:Carbonmonoxide poisoning may lead to death!

CarbonMonoxidePoisoning: Earlysignsofcarbon 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 aremoreaffectedbycarbon monoxidethanothers. These include pregnant women, people with heart or lung disease or anemia, those under the influence of alcohol and those at high altitudes.

Natural and Propane/LPGas: NaturalandPropane/ LP gases are odorless. An odor-making agent is addedtothesegases.Theodorhelpsyoudetectagas 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.

WARNING: Do not use a blower insert, heat exchanger insertorotheraccessorynotapproved for use with this heater.

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.

Surface of heater becomes very hot when running heater. Keep children and adults away from hot surface to avoid burns or clothing ignition. Heater will remain hot for a time after shutdown. Allow surface to cool before touching.

Carefully supervise young children when they are in the same room with heater.

Make sure grill guard is in place before running heater.

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

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

2.Do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outdoors.

3.This heater shall not be installed in a bedroom or bathroom.

4.If you smell gas

•Shut off gas supply

•Do not try to light any appliance

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

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

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

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SAFETY INFORMATION

Continued

5.This heater needs fresh, outside air ventilation to run properly. This heater has an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS shuts down the heater if not enough fresh air is available. See Air for Combustion and Ventilation, page 5.

6.Keep all air openings in front and bottom of heater clear and free of debris.This will insure enough air for proper combustion.

7.If heater shuts off, do not relight until you provide fresh, outside air. If heater keeps shutting off, have it serviced.

8.Do not run heater

•where flammable liquids or vapors are used or stored

•under dusty conditions

9.Do not use heater if any part has been under water. Immediately call a qualified service technician to inspect the room heater and to replace any part of the control system and any gas control which has been under water.

10.Turn off and unplug (if using electricity) heater and let cool before servicing. Only a qualified service person should service and repair heater.

11.Operating heater above elevations of 4,500 feet (1,371 m) could cause pilot outage.

12.To prevent performance problems, do not use propane/LPfueltankoflessthan100lbs.(45kg) capacity.

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

14.Provide adequate clearances around air openings.

LOCAL CODES

Installanduseheaterwithcare.Followalllocalcodes.In the absence of local codes, use the latest edition of The National Fuel Gas Code, ANSI Z223.1/NFPA 54*.

*Available from:

American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

		PRODUCT
		IDENTIFICATION
	Grill	Control Knob &
		Ignitor Button
	Guard
		(inside door)

Front Panel

Figure 1 - Vent-Free Gas Heater

UNPACKING

1.Remove heater, front panel and grill from carton. Set aside in a safe location.

2.Carefully remove refractory from heater and remove packing material. Check refractory for any damage. If the refractory is damaged do not use. See Replacement Parts, page 21. Set aside in a safe location.

3.Checkheaterforanydamage.Ifheaterisdamaged, promptly return to where you bought heater.

PRODUCT FEATURES

SAFETY DEVICE

This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for vent-free room heaters.The ODS/pilot shuts off the heater if there is not enough fresh air.

IGNITION SYSTEM

This heater has either a piezo ignitor or electronic ignitor to light heater fuel supply.

THERMOSTATIC HEAT CONTROL

Thermostat models have a thermostat sensing bulb and a control valve. This results in the greatest heater comfort. This can also result in lower gas bills.

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AIR FOR COMBUSTION AND VENTILATION

WARNING:Thisheatershall not be installed in a confined space or unusually tight constructionunlessprovisionsare providedforadequatecombustionandventilationair.Readthe followinginstructionstoinsure proper fresh air for this and other fuel-burning appliances in your home.

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

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

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

PROVIDING ADEQUATE VENTILATION

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

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

1.Unusually Tight Construction

2.Unconfined Space

3.Confined Space

The information on pages 5 through 7 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

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 these three criteria, you must provide additional fresh air. See Ventilation Air From Outdoors, page 7.

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

Confined and Unconfined Space

The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.

* Adjoining rooms are communicating only if therearedoorlesspassagewaysorventilationgrills between them.

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.

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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. (6.1 m) (length) x 16 ft. (4.88 m) (width) x 8 ft. (2.44 m) (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:2560cu.ft.(72.4m3)(volumeofspace)x20

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

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

Vent-free heater	_____________ Btu/Hr
Gas water heater*	_____________ Btu/Hr
Gas furnace	_____________ Btu/Hr
Vented gas heater	_____________ Btu/Hr
Gas fireplace logs	_____________ Btu/Hr

Other gas appliances* +____________ Btu/Hr Total =____________ Btu/Hr

* Do not include direct-vent gas appliances. Di- rect-ventdrawscombustionairfromtheoutdoors and vents to the outdoors.

Example:
Gas water heater		40,000	Btu/Hr
Vent-free heater	+	20,000	Btu/Hr
Total	=	60,000	Btu/Hr

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

_________ Btu/Hr(maximumthespacecansupport)

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

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

60,000 Btu/Hr (actual amount of Btu/Hr used)

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

A.Reworkworksheet,addingthespaceofanadjoiningroom.Iftheextraspaceprovidesanunconfined 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 7.

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

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

WARNING: If the area in which the heater may be operatedissmallerthanthatdefined 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" (30.4 cm) of the ceiling and one within 12" (30.4 cm) of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2). You can also remove door into adjoiningroom(seeoption3,Figure2).Followthe

National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section5.3,AirforCombustionandVentilation for required size of ventilation grills or ducts.

	12"
	Ventilation Grills
Ventilation	Into Adjoining Room,
	Option 2
Grills	Or
into Adjoining	Remove
Room,	Door into
Option 1	Adjoining
	Room,
	Option 3
	12"

Figure 2 - Ventilation Air from Inside Building

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AIR FOR COMBUSTION

AND VENTILATION

Continued

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent openings: one within 12" (30.4 cm) of the ceiling and one within 12" (30.4 cm) of the floor. 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. Heated airentering the attic 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:Thisheaterisintended 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 centralheatingsystem,youmay run system’s circulating blower whileusingheater.Thiswillhelp circulatetheheatthroughoutthe house. In the event of a power outage, you can use this heater as your primary heat source.

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

CHECK GAS TYPE

Use only the correct type of gas (natural or propane/LP). If your gas supply is not the correct gas type, do not install heater. Call dealer where you bought heater for proper type heater.

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

INSTALLATION ITEMS

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

•forpropane/LPgas,externalregulator(supplied by installer)

•piping from gas supply (check local codes)

•flex gas tubing

•sealant (resistant to propane/LP gas)

•equipment shutoff valve*

•flex gas line with 3/8" NPT tap

•ground joint union

•sediment trap

•tee joint

•pipe wrench

•for natural gas, test gauge connection*

*ACSAdesign-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. The optional CSA designcertifiedequipmentshutoffvalvecanbepurchased from your dealer. See Accessories, page 21.

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INSTALLATION

Continued

LOCATING HEATER

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

WARNING: Never install the heater

•in a bedroom or bathroom

•in a recreational vehicle

•where curtains, furniture, clothing or other flammable objects are less than 36" from the front, top or sides of the heater

•as a fireplace insert

•in high traffic areas

•in windy or drafty areas

CAUTION: If you install the heater in a home garage

•heaterpilotandburnermustbe at least 18" above floor

•locate heater where moving vehicle will not hit it

For convenience and efficiency, install heater

•wherethereiseasyaccessforoperation,inspection and service

•in coldest part of room

CEILING
6" (15.2 cm)	36" (91.4 cm)
Minimum	Minimum
From
Sides Of
Heater
	14"
	(35.6 cm)
Left	minimum	Right
		Side
Side
	Residential Heaters:
	2" Minimum To Top
	Surface Of Carpeting,
	Tile Or Other
	Combustible Material
FLOOR	Garage Heaters:
	18" Minimum To
	Garage Floor
Figure 4 - Mounting Clearances As
Viewed From Front of Heater
THERMOSTAT SENSING BULB
Thethermostatsensingbulbislocatedonthelower
rear panel of heater.

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

2.Snap clamp into mounting hole as shown in Figure5.Mountingholeislocatedin the center of lower back panel of heater. Make sure the thermostat sensing bulb is horizontal.

CAUTION:Thisheatercreates warmaircurrents.Thesecurrents move heat to wall surfaces next to heater. Installing heater next to vinyl or cloth wall coverings or operating heater where impurities (such as, but not limited to, tobaccosmoke,aromaticcandles, cleaning fluids, oil or kerosene lamps, etc.) in the air exist, may discolor walls or cause odors.

IMPORTANT: Vent-free heaters add moisture to the air.Although this is beneficial, installing heater in rooms without enough ventilation air may cause mildewtoformfromtoomuchmoisture.SeeAirfor CombustionandVentilation,page5.Ifhighhumidity is experienced, a dehumidifier may be used to help lower the water vapor content in the air.

	Clamp	Thermostat
		Sensing Bulb

Figure 5 - Attaching Thermostat Sensing

Bulb

INSTALLING HEATER TO WALL

Methods For Attaching Heater To Wall

Attach heater to wall in one of two ways:

1.Attaching to wall stud

2.Attaching to wall anchor

Attaching to Wall Stud: This method provides the strongest hold. Insert mounting screws into wall studs.

Attaching to WallAnchor: Thismethodallowsyou to attach mounting screws to hollow walls (wall areas between studs) or to solid walls (concrete or masonry).

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INSTALLATION

Continued

Decidewhichmethodbettersuitsyourneeds.Either method will provide a secure hold for the heater.

Marking Screw Locations

WARNING: Maintain minimum clearances shown in

Figure 4. If you can, provide greater clearances from floor and joining wall.

Mark three screw locations on wall as shown in Figure 6).

			20,000 Btu Heaters
			16 7/8"
		7"	30,000 Btu Heaters
			24 5/16"
		Min.
	AdjoiningWall	9"	Insert
			Mounting	18 3/4"
		Min.
			Screws	Min.
			Floor

5.Insert mounting screws into wall anchors.

6.Tighten screws until screw head is 1/8" away from wall.

Figure 7 - Folding	Figure 8 - Popping
Anchor	Open Anchor Wings
	For Thin Walls

Placing Heater On Mounting Screws

1.Locate two top vertical key slots on back end panels of heater.

2.Place heater onto mounting screws.

Vertical

Key Slots

Figure 6 - Wall Mounting Clearances

Locate hardware packet behind left side door of heater.

Attaching To Wall Stud Method

For attaching heater to wall studs

1.Drill holes at marked locations using 9/64" drill bit. Holes must be level to prevent complications with front panel.

2.Tighten screws until screw head is 1/8" away from wall.

Attaching To Wall Anchor Method

Forattachingheatertohollowwalls(wallareasbetween studs) or solid walls (concrete or masonry).

1.Drill holes at marked locations using 5/16" drill bit. Holes must be level to prevent complications with front panel. For solid walls (concrete or masonry), drill at least 1" deep.

2.Fold wall anchor as shown in Figure 7.

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

4.For thin walls (1/2" or less), insert red key into wall anchor. Push red key to “pop” open anchor wings. IMPORTANT:Do not hammer key! For thick walls (over 1/2" thick) or solid walls, do not pop open wings.

Figure 9 - Vertical Key Slots for Mounting Heater to Wall

CONNECTING TO GAS SUPPLY

WARNING: This appliance requires a 3/8" NPT (National PipeThread)inletconnectionto the pressure regulator.

WARNING:Aqualifiedservice personmustconnectheatertogas supply. Follow all local codes.

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

IMPORTANT: For natural gas, check gas line pressure before connecting heater to gas line. Gas line pressure must be no greater than 10.5" of water. If gas line pressure is higher, heater regulator damage could occur.

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INSTALLATION

Continued

CAUTION: For propane/LP gas, never connect heater directly to the propane/LP supply. This heater requires an external regulator (not supplied). Install theexternalregulatorbetweenthe heater and propane/LP supply.

For propane/LP gas, the installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between 11" and 14" of water. If you do not reduce incoming gas pressure, heater regulator damage could occur. Install the external regulator with the vent pointing down as shown in Figure 10. Pointing the vent down protects it from freezing rain or sleet.

CAUTION: Use only new, black iron or steel pipe. Inter- nally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of large enough diameter to allow proper gas volume to heater. If pipe is too small, undue loss of volume will occur.

Typical Inlet Pipe Diameters 20,000 Btu/Hr Models - 3/8" or greater 30,000 Btu/Hr Models - 1/2" or greater

Installation must include equipment shutoff valve, union and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPTtap must be upstream from heater (see Figure 11).

Propane/LP	External
Supply Tank
	Regulator
	Vent
	Pointing
	Down

Figure 10 - External Regulator With Vent

Pointing Down

IMPORTANT:Install an equipment shutoff valve in an accessible location. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.

Apply pipe joint sealant lightly to male NPT threads. This will prevent excess sealant from going into pipe. Sealant in pipe could result in clogged heater valves. Most flex gas tubing does not require sealant. Read instructions supplied with flex gas tubing.

WARNING: Use pipe joint sealantthatisresistanttoliquid petroleum (LP) gas.

Rear View	Hole
	Provided
	in Rear
	Surround

		3/8" Male	Pipe Joint
	Flex Gas		Sealant
		Flare to NPT
			Required
	Line
		Connector
			(NPT End)
	3/8" Male		Pressure
	Flare		Regulator
	to NPT
	Connector
	Pipe Joint	Equipment
	Sealant	Shutoff
	Required	Valve*

(NPT End)
Tee Joint
Reducer
Bushing
to 1/8"
NPT
1/8" NPT
Plug Tap	3"
Test Gauge
Connection*

3/8" NPT Pipe Nipple

Natural Gas From Gas Meter (4" W.C. to 10.5" W.C. Pressure)

	Propane/LP
	From External
Min	Regulator
	(11" W.C. to 14"
	W.C. Pressure)

Cap Tee	Pipe
Joint	Nipple
Sediment Trap

Figure 11 - Gas Connection

*ACSAdesign-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA design-certifiedequipmentshutoffvalvefromyour dealer. See Accessories, page 21.

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INSTALLATION

Continued

Install sediment trap in supply line as shown in Figure 11, page 10. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapped matter is not likely to freeze. Asediment 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.

Installmaleconnectorandflexgaslinetoequipment shutoffvalvethroughholeprovidedinrearsurround as shown in Figure 11, page 10.

IMPORTANT: Hold the pressure regulator and connector with wrench when connecting it to gas piping and/or fittings. Do not over tighten pipe connection to regulator. The regulator body could be damaged.

CHECKING GAS CONNECTIONS

WARNING:Testallgaspiping and connections, internal and external to unit, for leaks after installing or servicing. Correct all leaks at once.

WARNING: Never use an open flame to check for a leak. Applyanoncorrosiveleakdetection fluid to all joints. Bubbles forming show a leak. Correct all leaks at once.

CAUTION: For propane/LP gas, make sure external regulator has been installed between propane/LP supply and heater.

See guidelines under Connecting to Gas Supply, page 9.

PRESSURE TESTING GAS SUPPLY PIPING SYSTEM

Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)

1.Disconnect appliance with its appliance main gas valve (control valve) and equipment shutoff valve from gas supply piping system. Pressures in excess of 1/2 psig will damage heater regulator.

2.Cap offopenendof gaspipewhere equipment shutoff valve was connected.

3.Pressurize supply piping system by either opening propane/LP supply tank valve for propane/LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air.

4.Check all joints of gas supply piping system. Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

5.Correct all leaks at once.

6.Reconnectheaterandequipmentshutoffvalve to gas supply. Check reconnected fittings for leaks.

Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)

1.Close equipment shutoff valve (see Figure 12).

2.Pressurize supply piping system by either opening propane/LP supply tank valve for propane/LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air.

3.Check all joints from gas meter for natural gas or propane/LP supply tank for propane/LP gas, to equipment shutoff valve (see Figure 13 or 14, page 12). Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

4.Correct all leaks at once.

PRESSURE TESTING HEATER GAS CONNECTIONS

1.Open equipment shutoff valve (see Figure 12).

2.For natural gas open main gas valve located on or near gas meter. For propane/LPgas open propane/LP supply tank valve.

3.MakesurecontrolknobofheaterisintheOFF position.

4.Checkalljointsfromequipmentshutoffvalveto thermostat gas valve (see Figure 13 or 14, page 12). Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

5.Correct all leaks at once.

6.Lightheater(seeOperatingHeater,thispage). Check all other internal joints for leaks.

7.Turn off heater (see To Turn Off Gas to Appliance, page 13).

8.Install refractory and front panel.

Open

Equipment

Shutoff Valve

Closed

Figure 12 - Equipment Shutoff Valve

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INSTALLATION

Continued

Thermostat

Gas Valve

Gas

Meter

Equipment

Shutoff

Valve

Figure 13 - Checking Gas Joints for Natural Gas

Propane/LP
Supply Tank	Thermostat
	Gas Valve
	Equipment
	Shutoff
	Valve
Figure 14 - Checking Gas Joints for
	Propane/LP Gas

Installing Refractory and Front Panel

WARNING: Examine refractory panel. If damaged, do not operate heater. See Replacement Parts, page 21.

1.Gently lift refractory and position into heater. Take care not to damage refractory. Ensure refractory sits behind preforated tab. (see Figure 15).Ifrefractoryisdamagedcallthephonenumber found under Replacement Parts, page 21.

CAUTION: Refractory may shiftinsideheater.Wheninstallingorremovingfrontpanel,use caution to prevent refractory from falling.

2.Install front diffuser as shown in Figure 15.

3.Installfrontpanelofheaterby placing slots on each sideover anddownontoshoulderscrews (see Figure 15).

Refractory	Shoulder
	Screw

		Front	Preforated
	Front Panel		Tab
		Diffuser
	Figure 15 - Installing Front Panel and
		Refractory

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 applianceareaforgas.Besuretosmellnext tothefloorbecausesomegasisheavierthan air and will settle on the floor.

WHAT TO DO IFYOU SMELL GAS

•Do not try to light any appliance.

•Do not touch any electric switch; do not use any phone in your building.

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

•If you cannot reach yourgas supplier, call the fire department.

C.Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, donʼt try to repairit, call a qualified service technician. Force or attempted repair may result in a fire or explosion.

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OPERATING HEATER

Continued

D.Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

LIGHTING

INSTRUCTIONS

1.STOP!Readthesafetyinformationstarting on page 12.

2.Make sure equipment shutoff valve is fully open.

3.Turnoffanyelectricpowertotheappliance if service is to be performed.

4.Turn control knob clockwise to the OFF position.

5.Waitfiveminutestoclearoutanygas.Then smellforgas,includingnearthefloor.Ifyou smell gas, STOP! Follow “B” in the safety informationstartingonpage12.Ifyoudonʼt smell gas, go to the next step.

6.Turn control knob counterclockwise tothePILOTposition.Pressincontrolknob for five (5) seconds.

7.With control knob pressed in, push down and release ignitor button. This will light pilot. The pilot is attached to the front of burner. Note: You may be running this heaterforthe first time afterhooking up to gas supply. If so, you may need to press in control knob for 30 seconds or more. This will allow air to bleed from the gas system. Ifneeded,keeppressingignitorbuttonuntil pilot lights. If ignitor does not light pilot, refertoTroubleshooting,page16orcontact aqualifiedservicepersonorgassupplierfor repairs. Until repairs are made, light pilot with match. To light pilot with match, see

Manual Lighting Procedure, page 14.

8.Keepcontrolknobpressedinfor30seconds afterlightingpilot.After30seconds,release control knob.

•If control knob does not pop up when released,contactaqualifiedserviceperson or gas supplier for repairs.

Note:Ifpilotgoesout,repeatsteps4thru7. Thermostat models have a safety interlock system.Wait one (1) minute before lighting pilot again.

9.Turncontrolknobcounterclockwise to desired heating level. The main burner should light.

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

	Ignitor Button	Control Knob
	(Actual Ignitor may vary)
		F
		F
		O
	Figure 16 - Control Knob In The OFF
	Position
	Thermocouple	Ignitor
		Electrode
		Pilot
		Burner

Figure 17 - Pilot

TO TURN OFF GAS TO APPLIANCE Shutting Off Heater

1.Turn control knob clockwise to the OFF position.

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

Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise	to the
PILOT position.

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OPERATING HEATER

Continued

THERMOSTAT CONTROL OPERATION

The thermostatic control used on these models differs from standard thermostats. Standard thermostats simply turn on and off the burner. The thermostat used on this heater senses the room temperature. At times the room may exceed the set temperature. If so, the burner will shut off. The burner will cycle back on when room temperature drops below the set temperature. The control knob can be set to any heat level between 1 and 5. This adjusts the amount of gas flow to the burnerthat increases or decreases the burner flame height.

Note: The thermostat sensing bulb measures the temperature of air near the heater cabinet. This may not always agree with room temperature (depending on housing construction, installation location, room size, open air temperatures,etc.)Frequentuseofyourheaterwill let you determine your own comfort levels.

MANUAL LIGHTING PROCEDURE

1.Remove front panel (see Figure 10, page 9).

2.Follow steps 1 through 7 under Lighting Instructions, page 13.

3.Withcontrolknobpressedin,strikematch. Hold match to pilot until pilot lights.

4.Keepcontrolknobpressedinfor30seconds afterlightingpilot.After30seconds,release control knob. Now follow step 9, under

Lighting Instructions, page 13.

5.Replace front panel.

INSPECTING HEATER

Check pilot flame pattern and burner flame pattern often.

PILOT FLAME PATTERN

Figure18showsacorrectpilotflamepattern.Figure 19showsanincorrectpilotflamepattern.Theincorrect 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 19

•turn heater off (see To Turn Off Gas to Appliance, page 13)

•see Troubleshooting, page 16

Note: The pilot flame on natural gas units will have a slight curve, but flame should be blue and have no yellow or orange color.

Thermocouple	Blue Pilot Flame
	Pilot Burner

Figure 18 - Correct Pilot Flame Pattern

Thermocouple

Yellow Pilot Flame

Pilot Burner

Figure 19 - Incorrect Pilot Flame Pattern

BURNER FLAME PATTERN

WARNING: If yellow tipping occurs, your heater could produceincreasedlevelsofcarbon monoxide.

NOTICE:Donotmistakeorange flames with yellow tipping. Dirt or other fine particles enter the heater and burn causing brief patches of orange flame.

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INSPECTING HEATER

Continued

Figure 20 shows a correct burner flame pattern. Figure 21 shows an incorrect burner flame pattern. The incorrect burner flame pattern shows yellow tipping of the flame.

If burner flame pattern is incorrect, as shown in Figure 21

•turn heater off (see To Turn Off Gas to Appliance, page 14)

•	see Troubleshooting, page 16
	Blue
	Flame

Figure 20 - Correct Burner Flame Pattern

Yellow

Tipping

Figure 21 - Incorrect Burner Flame Pattern

CLEANING AND MAINTENANCE

WARNING: Turn off heater and let cool before cleaning.

CAUTION: You must keep control areas, burner and circulatingairpassagewaysofheater clean. Inspect these areas of heater before each use. Have heater inspected yearly by a qualifiedserviceperson.Heater may need more frequent cleaning due to excessive lint from carpeting,beddingmaterial,pet hair, etc.

WARNING: Failure to keep the primary air opening(s) of theburner(s)cleanmayresultin sooting and property damage.

ODS/PILOT AND BURNER

Use a vacuum cleaner, pressurized air or small, soft bristled brush to clean.

BURNER PILOT AIR INLET

The primary air inlet holes allow the proper amount of air to mix with the gas. This provides a cleanburningflame.Keeptheseholesclearofdust, dirtandlint.Cleantheseairinletholespriortoeach heating season. Blocked air holes will create soot. We recommend that you clean the unit every three monthsduringoperationandhaveheaterinspected yearly by a qualified service person.

We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt. To clean these parts we recommend using compressed air no greater than 30 PSI. Your local computer store, hardware store or home center may carry compressed air in a can. You can use a vacuum cleaner in the blow position. If using compressed air in a can, please follow the directions on the can. If you donʼt follow directions on the can, you could damage the pilot assembly.

1.Shut off the unit, including the pilot. Allow the unit to cool for at least thirty minutes.

2.Inspect burner, pilot for dust and dirt.

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

4.Never insert objects into the pilot tube.

Clean the pilot assembly also.Ayellow tip on the pilot flame indicates dust and dirt in the pilot assembly. There is a small pilot air inlet about two inches from where the pilot flame comes out of the pilot assembly (see Figure 22).With the heater off, lightly blow air through the air inlet.You may blow through a drinking straw if compressed air is not available.

Pilot Assembly

Pilot Air Inlet

Figure 22 - Pilot Air Inlet CABINET

Air Passageways Use a vacuum cleaner or pressurized air to clean.

Exterior Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to remove dust.

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