UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER SAFETY INFORMATION AND INSTALLATION MANUAL
CBN20, CBP20, SBN20, SBP20, CBN20T, CBP20T, CBN30T, CBP30T, CBT20NT, CBT20PT, CBT30NT, CBT30PT, CBN20TK, CBP20TK
WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.
—Donotstoreorusegasolineorotherflammablevapors 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.
•Donottouchanyelectricalswitch;donotuseany 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
TABLE OF CONTENTS
Safety Information ............................................... |
3 |
Specifications .................................................... |
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18 |
Local Codes ........................................................ |
4 |
Troubleshooting................................................. |
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19 |
Unpacking ........................................................... |
4 |
Service Hints ..................................................... |
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22 |
Product Information............................................. |
4 |
Technical Service .............................................. |
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22 |
Product Features................................................. |
4 |
Service Publications.......................................... |
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22 |
Air For Combustion and Ventilation..................... |
5 |
Replacement Parts............................................ |
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22 |
Installation ........................................................... |
7 |
Accessories....................................................... |
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23 |
Operating Heater............................................... |
14 |
Illustrated Parts Breakdown and Parts List ....... |
24 |
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Inspecting Heater .............................................. |
16 |
Parts Centrals.................................................... |
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30 |
Cleaning and Maintenance................................ |
17 |
Warranty Information........................... |
Back Cover |
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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!
Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness, or nausea. If you have these signs,theheatermaynotbeworkingproperly.Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, people with heart or lung disease or anemia, those under the influence of alcohol, and those at high altitudes.
Natural and Propane/LP Gas: Natural and propane/LP gases are fuel gases. Fuel gases are odorless.An odor-making agent are added to fuel gases. The odor helps you detect a fuel gas leak. However, the odor added to fuel gas can fade. Fuel gas may be present even though no odor exists.
Make certain you read and understand all warnings. Keep this manual for reference. It is your guide to safe and proper operation of this heater.
WARNING: Any change to this heater or its controls can be dangerous.
WARNING: Do not use a blower insert, heat exchanger 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 gasindicatedontheratingplate.Thisappliance is not convertible for use with other gases.
2.Do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply tank(s) outdoors (propane/LP models only).
3.If you smell gas
•shut off gas supply
•do not try to light any appliance
•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
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SAFETY INFORMATION
Continued
4.This heater shall not be installed in a bedroom or bathroom.
5.This heater needs fresh, outside air ventilation to run properly. This heater has an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS shuts down the heater if not enough fresh air is available. See Air for Combustion and Ventilation, page 4.
6.Keep all air openings in front and bottom of heater clear and free of debris.This willinsure enough air for proper combustion.
7.If heater shuts off, do not relight until you provide fresh, outside air. If heater keeps shutting off, have it serviced.
8.Do not run heater
•where flammable liquids or vapors are used or stored
•under dusty conditions
9.Do not use heater if any part has been under water. Immediately call a qualified service technician to inspect the room heater and to replace any part of the control system and any gas control which has been under water.
10.Turn off and let cool before servicing. Only a qualified service person should service and repair heater.
11.Operating heater above elevations of 4,500 feet could cause pilot outage.
12.To prevent performance problems, do not use propane/LP fuel tank of less than 100 lbs. capacity (propane/LP models only).
13.Provide adequate clearances around air openings.
Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of National Fuel Gas Code, ANSI Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
1.Remove heater from carton.
2.Remove all protective packaging applied to heater for shipment.
3.Check heater for any shipping damage. If heater is damaged, promptly return to dealer where you bought heater.
Control Knob & Ignitor
Button (not seen from Heater this view)
Cabinet
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Grill |
Front Panel |
Glass Panel |
Guard |
|
Figure 1 - Vent-Free Gas Heater
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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WARNING: This heater shall not be installed in a 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 thanever.Newmaterials,increasedinsulation,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 (6x10-11 kg per pa-sec-m2) or less with openings gasketed or sealed and
b.weather stripping has been added on openable windows and doors and
c.caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines, and at other openings.
If your home meets all of the three criteria above, you must provide additional fresh air. See Ventilation Air From Outdoors, page 7.
If your home does not meet all of the three criteriaabove,proceedtoDeterminingFreshAir Flow For Heater Location, page 6.
Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.
* Adjoining rooms are communicating only if therearedoorlesspassagewaysorventilationgrills between them.
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AIR FOR COMBUSTION
AND VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if You Have a Confined or Unconfined Space
Use this work sheet to determine if you have a confined or unconfined space.
Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.
1.Determine the volume of the space (length x width x height).
Length x Width x Height =__________cu. ft. (volume of space)
Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.
2.Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support.
_______ (volume of space) x 20 = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximum Btu/Hr the space can support)
3.Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater |
______________ Btu/Hr |
Gas water heater* |
______________ Btu/Hr |
Gas furnace |
______________ Btu/Hr |
Vented gas heater |
______________ Btu/Hr |
Gas fireplace logs |
______________ Btu/Hr |
Other gas appliances* + __________ |
Btu/Hr |
|
Total |
= __________ |
Btu/Hr |
* Do not include direct-vent gas appliances. 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 (maximum the space can support)
_______________Btu/Hr (actual amount of Btu/Hr used)
Example:
51,200 Btu/Hr (maximum the space can support)
60,000 Btu/Hr (actual amount of Btu/Hr used)
The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support.You must provide additional fresh air. Your options are as follows:
A.Reworkworksheet,addingthespaceofanadjoiningroom.Iftheextraspaceprovidesanunconfined space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 7.
B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.
C.Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.
WARNING: If the area in which the heater may be 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.
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AIR FOR COMBUSTION
AND VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two permanent openings: one within 12” of the ceiling and one within 12” of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2).You can also remove door into adjoining room (see option 3, Figure 2). Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.
Ventilation Air From Outdoors
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.
|
12" |
|
Ventilation Grills |
Ventilation |
Into Adjoining Room, |
Option 2 |
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Grills |
Or |
into Adjoining |
Remove |
Room, |
Door into |
Option 1 |
Adjoining |
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Room, |
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Option 3 |
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12" |
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Outlet |
Ventilated |
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Attic |
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Air |
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Outlet |
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Air |
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To Attic |
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To |
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Crawl |
Inlet |
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Space |
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Air |
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Inlet Air |
Ventilated |
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Crawl Space |
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Figure 3 - Ventilation Air from Outdoors
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.
Figure 2 - Ventilation Air from Inside Building
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7 |
INSTALLATION
Continued
INSTALLATION ITEMS
Before installing heater, make sure you have the items listed below.
•forpropane/LPgas,externalregulator(supplied by installer)
•piping (check local codes)
•sealant (resistant to propane/LP gas)
•equipment shutoff valve *
•ground joint union
•sediment trap
•tee joint
•pipe wrench
•test gauge connection*
* 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 23.
LOCATING HEATER
WARNING: Maintain the minimum clearances shown in Figure 4. If you can, provide greater clearances from floor, ceiling, and joining wall.
You can locate heater on the floor, away from a wall.Awallmountingbracketisincludedwiththis heater. An Optional Base Kit (GA4550) may be purchased to allow the unit to be installed away from a wall (see Accessories, page 23). Determine which method is best for your application.
CEILING |
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36" |
6" |
Minimum |
Minimum |
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From |
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Sides Of |
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Heater |
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Left |
Right |
Side |
Side |
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2" Minimum To |
FLOOR |
Top Surface |
Of Carpeting, |
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|
Tile Or Other |
|
Combustible |
|
Material |
Figure 4 - Mounting Clearances As
Viewed From Front of Heater
WARNING: Never install the heater
•in a bedroom or bathroom
•in a recreational vehicle
•where curtains, furniture, clothing, or other flammable objectsarelessthan36inches from the front, top, or sides of the heater
•as a fireplace insert
•in high traffic areas
•in windy or drafty areas
CAUTION: This heater creates warm air currents. These currents move heat to wall surfaces next to heater. Installing heater next to vinyl or cloth wall coverings or operating heater where impurities (such as, but not limited to, tobacco smoke, aromatic candles, cleaning fluids,oilorkerosenelamps,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, pages 5 through 7. If high humidity is experienced, a dehumidifier may be used to help lower the water vapor content in the air.
CAUTION: If you install the heater in a home garage
•heaterpilotandburnermustbe at least 18 inches 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
An optional fan kit is available from your dealer. See Accessories, page 23. If planning to use fan,
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INSTALLATION
Continued
THERMOSTAT SENSING BULB
The thermostat sensing bulb is below the heater.
1.Place clamp on thermostat sensing bulb as shown in Figure 5. Clamp is provided in hardware package.
2.Snapclampintouppermountingholeasshown in Figure 5. Mounting hole is located on lower left edge on back of heater. Make sure the thermostat sensing bulb is pointing up.
Thermostat
Sensing Bulb
Clamp
Figure 5 - Attaching Thermostat Sensing
Bulb
INSTALLING HEATER TO WALL
Mounting Bracket
Locatemountingbracketinheatercarton.Remove mounting bracket from heater carton.
Figure 6 - Mounting Bracket
Removing Front Panel Of Heater
1.Remove the four painted screws, two on each side of front panel.
2.Pull bottom of front panel forward, then out.
3.Remove any remaining packaging materials.
Figure 7 - Removing Front Panel Of
Heater
Methods For Attaching Mounting Bracket To Wall
Onlyuselastholeoneachendofmountingbracket to attach bracket to wall. These two holes are 14 inches apart from their centers. Attach mounting bracket to wall in one of two ways:
1.Attaching to wall stud
2.Attaching to wall anchor
Attaching to Wall Stud: This method provides the strongest hold. Insert mounting screws through mounting bracket and into wall studs.
AttachingtoWallAnchor:Thismethodallowsyou to attach mounting bracket to hollow walls (wall areas between studs) or to solid walls (concrete or masonry).
Decide which method better suits your needs. Either method will provide a secure hold for the mounting bracket.
Marking Screw Locations
1.Tape mounting bracket to wall where heater will be located. Make sure mounting bracket is level.
WARNING: Maintain minimum clearances shown in Figure8,page9.Ifyoucan,provide greater clearances from floor and joining wall.
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9 |
INSTALLATION
Continued
2.Mark screw locations on wall (see Figure 8).
Note: Only mark last hole on each end of mounting bracket. Insert mounting screws through these holes only.
3.Remove tape and mounting bracket from
12" |
14" |
Min. |
|
WallAdjoining |
Only Insert Mounting |
18 3/4" |
Screws Through Last |
Min. |
|
|
Hole On Each End |
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|
|
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Floor |
|
30,000 Btu/hr Models |
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|
8" |
14" |
|
Min. |
|
|
AdjoiningWall |
Only Insert Mounting |
18 3/4" |
Screws Through Last |
Min. |
|
|
Hole On Each End |
|
|
|
Floor
20,000 Btu/hr Models
Figure 8 - Mounting Bracket Clearances
Attaching Mounting Bracket To Wall
Note:Wallanchors,mountingscrews,andspacers are in hardware package. The hardware package is provided with heater.
Attaching To Wall Stud Method
For attaching mounting bracket to wall studs
1.Drill holes at marked locations using 9/64" drill bit.
2.Placemountingbracketontowall.Lineuplast hole on each end of bracket with holes drilled in wall.
3.Insert mounting screws through bracket and into wall studs.
4.Tighten screws until mounting bracket is
firmly fastened to wall studs.
Attaching To Wall Anchor Method
For attaching mounting bracket to hollow walls (wall areas between studs) or solid walls (concrete or masonry)
1.Drill holes at marked locations using 5/16" drillbit.Forsolidwalls(concreteormasonry), drill at least 1" deep.
2.Fold wall anchor as shown in Figure 9.
3.Insert wall anchor (wings first) into hole. Tap anchor flush to wall.
4.For thin walls (1/2" or less), insert red key into wall anchor. Push red key to “pop” open anchor wings. IMPORTANT:Do not hammer key! For thick walls (over 1/2" thick) or solid walls, do not pop open wings.
5.Place mounting bracket onto wall. Line up last hole on each end of bracket with wall anchors.
6.Insert mounting screws through bracket and into wall anchors.
7.Tighten screws until mounting bracket is firmly fastened to wall.
Figure 9 - Figure 10 - Popping
Folding Anchor Open Anchor Wings
For Thin Walls
Placing Heater On Mounting Bracket
1.Locate two horizontal slots on back panel of heater.
2.Place heater onto mounting bracket. Slide horizontal slots onto stand-out tabs on mounting bracket.
Horizontal Slots
Stand-Out Tab
Mounting Bracket (attached to wall)
Figure 11 - Mounting Heater Onto
Mounting Bracket
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