Desa VSL18NT, LSL18NT, VSL18PT, LSL18PT, SL18NT User Manual

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UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER
SAFETY INFORMATION AND INSTALLATION MANUAL
18,000 BTU THERMOSTAT MODELS
LSL18NT, LSL18PT, SL18NT, SL18PT, VSL18NT AND VSL18PT
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.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
— Installation and service must be performed by a quali-
fied 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 prop­erty damage. Refer to this manual for correct installation and operational procedures. For assistance or addi­tional information consult a qualified installer, service agency or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed. Provi­sions for adequate combustion and ventilation air must be provided. Refer to Air for Combustion and Ventilation section on page 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 indi cated 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 Common wealth of Massachusetts.
Safety Information ............................................... 3
Local Codes ........................................................ 4
Product Identification ........................................... 4
Unpacking ........................................................... 4
Product Features ................................................. 4
Air For Combustion And Ventilation .....................
Installation ........................................................... 7
Operating Heater ............................................... 14
Inspecting Heater ............................................. 16
Cleaning and Maintenance ................................ 17
Troubleshooting .................................................
TABLE OF CONTENTS
Specifications .................................................... 22
Wiring Diagrams ................................................ 22
Accessories ....................................................... 23
Technical Service .............................................. 23
Service Publications .......................................... 23
5
Replacement Parts ............................................ 23
Service Hints ..................................................... 23
Illustrated Parts Breakdown and Parts List ....... 24
Parts Centrals .................................................... 26
Warranty Information .........................................
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116292-01D

SAFETY INFORMATION

WARNING: This product con­tains and/or generates chemicals known to the State of California to cause cancer or birth defects or other reproductive harm.
IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate or service this heater. Improper use of this heater can cause serious injury or death from burns, fire, explosion, electrical shock and carbon monoxide poisoning.
DANGER: Carbon monoxide poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of carbon
monoxide poisoning resemble the flu, with head aches, dizziness or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others. These include pregnant women, people with heart or lung disease or anemia, those under the influence of alcohol and those at high altitudes.
Natura l and Prop ane/L P 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 warn ings. 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 insert or other accessory not ap­proved for use with this heater.
Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies.
Do not place clothing or other flammable material on or near the appliance. Never place any objects on the heater.
Surface of heater becomes very hot when running heater. Keep children and adults away from hot surface to avoid burns or clothing ignition. Heater will remain hot for a time after shut down. Allow surface to cool before touching.
Carefully supervise young chil­dren when they are in the same room with heater.
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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) in
­side any structure. Locate propane/LP supply
tank(s) outdoors.
3. This heater shall not be installed in a bathroom or a bedroom.
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. 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.
10. 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.
11. Turn off and let cool before servicing. Only a qualified service person should service and repair heater.
12. Operating heater above elevations of 4,500 feet (1,371 m) could cause pilot outage.
13. To prevent performance problems, do not use propane/LP fuel tank of less than 100 lbs. (45 kg) capacity.
14. Provide adequate clearances around air openings.

LOCAL CODES

Install and use heater with care. Follow all lo­cal codes. In the absence of local codes, use the latest edition of National Fuel Gas Code, ANSI
Z223.1/NFPA 54*
*Available from:
American National Standards Institute, Inc.
National Fire Protection Association, Inc.
.
1430 Broadway
New York, NY 10018
Batterymarch Park
Quincy, MA 02269
PRODUCT
IDENTIFICATION
Heater Cabinet
Control Knob (under door)
Glass Panel
Ignitor
Figure 1 - Vent-Free Gas Heater

UNPACKING

1. Remove heater from carton.
2. Remove all protective packaging applied to heater for shipment.
3. Check heater for any shipping damage. If heater is damaged, promptly inform dealer 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 great est heater comfort. This can also result in lower gas bills.
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116292-01D
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall not be installed in a confined space or unusually tight con­struction unless provisions are provided for adequate combus­tion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.
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 effi cient, 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 fol lowing 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 out
side atmosphere have a continuous water vapor retarder with a rating of one perm (6x10 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 criteria above, proceed to Determin-
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ing Fresh-Air 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
3
per kw) of the aggregate input rating of
(4.8 m all appliances installed in that space. Rooms com municating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the
­unconfined space.
* Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them.
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kg per pa-sec-m2) or
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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. (6.1 m) (length) x 16
ft. (4.88 m)(width) x 8 ft. (2.44 m) (ceiling height) = 2560 cu. ft. (72.49 m3) (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. (72.49 m3) (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 ___________ Gas water heater* ___________ Gas furnace ___________ Vented gas heater ___________ Gas fireplace logs ___________ Other gas appliances* + __________ Total = __________ * Do not include direct-vent gas appliances. Di
rect-vent draws combustion air from the outdoors and vents to the outdoors.
Example: Gas water heater ___________ Vent-free heater + __________ Total = __________
40,000 18,000 58,000
Btu/Hr Btu/Hr Btu/Hr Btu/Hr Btu/Hr Btu/Hr Btu/Hr
Btu/Hr Btu/Hr Btu/Hr
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
_________ _________ Example: 51,200 Btu/Hr (maximum the space
58,000 Btu/Hr (actual amount of
The space in the above example is a confined space because the actual Btu/Hr used is more than the maxi mum 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 adjoin
ing 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, page 7.
B. Vent room directly to the outdoors. See Ventila
tion 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, fined space. You will need no additional fresh air ventilation.
Btu/Hr (maximum the space can support) Btu/Hr (actual amount of Btu/Hr used)
can support)
Btu/Hr used)
the space is an uncon-
WARNING: If the area in which the heater may be oper­ated is smaller than that defined as an unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code,
ANSI Z223.1/NFPA 54 Section 5.3
or applicable local codes.
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116292-01D
Or
Remove Door into Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option
2
12"
(30.4 cm)
Ventilation
Grills
into Adjoining
Room,
Option 1
12"
(30.4 cm)
Outlet Air
Ve
ntilated
Attic
Outlet
A
ir
Inlet Air
Inlet Air
Ve
ntilated
Crawl Space
To
Crawl
Space
To Attic
AIR FOR COMBUSTION
AND VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining un confined 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 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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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 install this heater as your pri­mary heat source. If you have a central heating system, you may run system’s circulating blower while using heater. This will help circulate the heat throughout the house. In the event of a power outage, you can use this heater as your primary heat source.
WARNING: A qualified ser­vice person must install heater. Follow all local codes.
Figure 2 - Ventilation Air from Inside
Building
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 thermostat­controlled power vent. Heated air entering the attic will activate the power vent.
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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 pro pane/LP) gas. Field conversion is not permitted.
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INSTALLATION
Continued
INSTALLATION ITEMS
Before installing heater, make sure you have the items listed below.
• for propane/LP gas, external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• ground joint union
• sediment trap
• tee joint
• pipe wrench
• for natural gas, test gauge connection*
* A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. The optional CSA design­certified equipment shutoff valve can be purchased from your dealer. See
REMOVING FRONT PANEL OF HEATER
1. Remove and discard shipping screw from back
panel of heater (see Figure 4).
2. Remove the four screws, two on each side of
front panel. Set aside.
3. Pull front panel forward from the bottom, then
lift panel up to remove. If ignitor is installed, pull front panel forward only 2" to 3" (5 to 7.6 cm) away from back panel. Reach into lower right side of heater and disconnect ignitor wire. Set front panel aside.
4. Remove any remaining packaging materials.
Accessories, page 23.
Shipping Screw Location
Installing Glass Panel
Items needed from hardware packet: 1 - Bushing
4 - Black spacers 4 - Retaining clips 4 - 1.5" long screws 4 - Screw covers
1. Locate hardware packet and dark acrylic glass.
2.
Peel protective coating from both sides of glass.
3. Snap bushing into center front hole of front panel (see Figure 5).
4. Turn front panel face down. Gently press onto a hard surface to snap bushing into hole. Turn panel back over, face up.
5. Place spacers over 4 holes on front panel as shown in Figure 5.
6. Position glass on top of spacers, aligning holes. Note: If glass gets scratched or marred from normal use, it may be reversed on heater.
7. Place 4 retaining clips on glass over holes.
8. Install screws in each hole, but do not tighten at this time.
9. Square glass up with top front surface of front panel. Tighten screws.
10. Snap screw covers over retaining clips.
Spacer
Bushing
Front Panel
Screw Cover
Retainer Clip
Glass Panel
Screw
Figure 5 - Installing Glass Panel
Front Panel
Screw
Figure 4 - Removing Front Panel Of Heater
8
Ignitor Wire
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INSTALLING IGNITOR
Locate ignitor in hardware bag. Determine if
1. your heater is equipped with piezo ignitor or an electronic ignitor (see Figures 6 and 7, page 9.
2. For Piezo Ignitor, snap ignitor into hole located on right side of heater as shown in Figure 6, page 9.
3. For Electronic Ignitor, install ignitor through hole located on right side of heater as shown in Figure 7, page 9.
116292-01D
INSTALLATION
Minimum From Sides Of Heater
36" (91.4 cm) Minimum
2" (5.1 cm)
FLOOR
CEILING
Minimum To To
p Surface Of Carpeting, Ti
le Or Other Combustible Material
Left Side
Right Side
6" (15.2 cm)
Side View
Continued
4. For both ignitors, install ignitor wire only when replacing front panel of heater after connecting to gas supply and checking gas connections (see pages 11 through 13). With bottom of front panel only 2" to 3" (5 to 7.6 cm) away from back panel, reach into lower right corner of heater to connect ignitor wire to ignitor terminal (see Figure 4, page 8).
Right Side of Heater
Piezo Ignitor
Figure 6 - Installing Piezo Ignitor
Electronic Ignitor
Right Side of Heater
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 the air. Although this is beneficial, installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See Air for Combustion and Ventilation, page 5. If high hu midity is experienced, a dehumidifier may be used to help lower the water vapor content in the air.
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Battery
CAUTION: If you install the heater in a home garage
• heater pilot and burner must
be at least 18" (45.7 cm) above floor
Figure 7 - Installing Electronic Ignitor
• locate heater where moving
vehicle will not hit it
LOCATING HEATER
This heater is designed to be mounted on a wall.
WARNING: Maintain the minimum clearances shown in Figure 8. If you can, provide greater clearances from floor,
For convenience and efficiency, install heater
• where there is easy access for operation, inspec tion and service
• in coldest part of room
Locate heater near a 120V 60Hz electrical outlet (normal household voltage).
ceiling and joining wall.
WARNING: Never install the
heater
• in a bathroom or a bedroom
• in a recreational vehicle
where curtains, furniture, cloth­ing or other flammable objects are less than 36" (92 cm) from the front, top or sides of the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
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Figure 8 - Mounting Clearances As
Viewed From Front of Heater
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INSTALLATION
13" (33 cm)
11"
(27.9 cm)
Min.
12"
(30.4
cm)
Min.
Ad j o in ing Wa l l
Only Insert Mounting Screws Through Last
Hole On Each End
Floor
Continued
INSTALLING HEATER TO WALL
Mounting Bracket
Locate mounting bracket that has been taped to back panel of heater for shipping. Remove mount­ing bracket from back panel of heater.
Figure 9 - Mounting Bracket
Methods For Attaching Mounting Bracket To Wall
Only use last hole on each end of mounting bracket to attach bracket to wall. These two holes centers are 13" (33 cm) apart. Attach mounting bracket to wall in one of two ways:
1. Attaching to wall stud
2. Attaching to wall anchor
Attaching to Wall Stud: This method provides the
strongest hold. Insert mounting screws through mounting bracket and into wall studs.
Attaching to Wall Anchor: This method allows you
to attach mounting bracket to hollow walls (wall areas between studs) or to solid walls (concrete or masonry).
Decide which method better suits your needs. Either method will provide a secure hold for the mounting bracket.
Marking Screw Locations
1. Tape mounting bracket to wall where heater will be located. Make sure mounting bracket is level.
WARNING: Maintain mini-
mum clearances shown in Figure
10. If you can, provide greater clearances from floor and join­ing wall.
2. Mark screw locations on wall (see Figure 10).
Note: Only mark last hole on each end of
mounting bracket. Insert mounting screws through these holes only.
3. Remove tape and mounting bracket from wall.
Attaching Mounting Bracket To Wall
Note:
Wall anchors, mounting screws and spacers are in hardware package. The hardware package is provided with heater.
10
Figure 10 - Mounting Bracket Clearances
Attaching To Wall Stud Method
For attaching mounting bracket to wall studs
1. Drill holes at marked locations using 9/64" drill bit.
2. Place mounting bracket onto wall. Line up last hole on each end of bracket with holes drilled in wall.
3. Insert mounting screws through bracket and into wall studs.
4. Tighten screws until mounting bracket is firmly fastened to wall studs.
Attaching To Wall Anchor Method
For attaching mounting bracket to hollow walls (wall areas between studs) or solid walls (concrete or masonry)
1. Drill holes at marked locations using 5/16" drill bit. For solid walls (concrete or masonry), drill at least 1" deep.
2. Fold wall anchor as shown in Figure 11.
3. Insert wall anchor (wings first) into hole. Tap anchor flush to wall.
4. For thin walls [1/2" (1.3 cm) or less], insert red key into wall anchor. Push red key to “pop” open anchor wings. IMPORTANT: key! For thick walls [over 1/2" (1.3 cm) 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.
Figure 12 - Popping Open Anchor Wings
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Do not hammer
Figure 11 - Folding Anchor
For Thin Walls
116292-01D
Side View
Front View
INSTALLATION
Continued
6. Insert mounting screws through bracket and into wall anchors.
7. Tighten screws until mounting bracket is firmly fastened to wall.
Placing Heater On Mounting Bracket
1. Locate two horizontal slots on back panel of heater.
2. Place heater onto mounting bracket. Slide horizontal slots onto stand-out tabs on mount ing bracket.
Horizontal Slots
Heater
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Wall
Spacer
Figure 14 - Installing Bottom Mounting
Screws
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 3/8" NPT (National
Stand-Out Tab
Figure 13 - Mounting Heater Onto
Mounting Bracket
Installing Bottom Mounting Screws
1. Locate two bottom mounting holes. These holes are near bottom on back panel of heater (see Figure 14).
2. Mark screw locations on wall.
3. Remove heater from mounting bracket.
4. If installing bottom mounting screws into hollow or solid wall, install wall anchors. Follow steps 1 through 4 under Attaching To
Wall Anchor Method
If installing bottom mounting screw into wall
stud, drill holes at marked locations using 9/64" drill bit.
5. Replace heater onto mounting bracket.
6. Place spacers between bottom mounting holes and wall anchor or drilled hole.
7. Hold spacer in place with one hand. With other hand, insert mounting screw through bottom mounting hole and spacer. Place tip of screw in opening of wall anchor or drilled hole.
8. Tighten both screws until heater is firmly secured to wall. Do not over tighten.
Note: Do not replace front panel at this time.
Replace front panel after making gas connec­tions and checking for leaks.
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Mounting Bracket (attached to wall)
, page 10.
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Pipe Thread) inlet connection to the pressure regulator.
WARNING: A qualified service person must connect heater to gas supply. Follow all local codes.
WARNING: For natural gas, never connect heater to private (non-utility) gas wells. This gas is commonly known as wellhead gas.
IMPORTANT: For natural gas, check gas line pressure before connecting heater to gas line. Gas line pressure must be no greater than 10.5" of wa ter. If gas line pressure is higher, heater regulator damage could occur.
CAUTION: For propane/LP gas, never connect heater di­rectly to the propane/LP supply. This heater requires an external regulator (not supplied). Install the external regulator between the heater and propane/LP supply.
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INSTALLATION
Continued
For propane/LP gas, the installer must supply an external regulator. The external regulator will reduce incoming gas pressure. You must reduce incoming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pres sure, heater regulator damage could occur. Install the external regulator with the vent pointing down as shown in Figure 15. 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 Diameter - 3/8" (9.5 mm) or
greater Installation must include equipment shutoff valve,
union and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figure 16).
IMPORTANT: Install an equipment shutoff valve in an accessible location. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.
Apply pipe joint sealant lightly to male NPT threads. This will prevent excess sealant from going into pipe. Excess sealant in pipe could result in clogged heater valves.
WARNING: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Propane/LP Supply Tank
External Regulator
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Vent Pointing Down
Install sediment trap in supply line as shown in Figure 16. Locate sediment trap where it is within reach for cleaning. Locate sediment trap where trapped matter is not likely to freeze. A sediment trap traps moisture and contaminants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater
­may not run properly.
IMPORTANT: Hold the pressure regulator with wrench when connecting it to gas piping and/or fittings. Do not over tighten pipe connection to regulator. The regulator body could be damaged.
Pressure Regulator
3/8" NPT Pipe Nipple
Tee Joint
Reducer Bushing to 1/8" NPT
1/8" NPT Plug Tap
Test Gauge Connection*
Tee Joint
Pipe Nipple
Cap
Sediment Trap
Figure 16 - Gas Connection
* A CSA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA design-certified equipment shutoff valve from your dealer. See
Accessories, page 23.
From Gas Meter (4" W.C.
to 10.5" W.C. Pressure)
From External Regulator
(11" W.C. to 14" W.C.
Heater Cabinet
Equipment Shutoff Valve *
3" (7.6 cm) Min.
Natural Gas
Propane/LP
Pressure)
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping and connections, internal and external to unit, for leaks after installing or servicing. Correct all leaks at once.
Figure 15 - External Regulator With Vent
12
Pointing Down
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116292-01D
INSTALLATION
Continued
WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak. Correct all leaks at once.
CAUTION: For propane/LP gas, make sure external regula tor has been installed between propane/LP supply and heater. See guidelines under Connect- ing to Gas Supply, page 11.
PRESSURE TESTING GAS SUPPLY PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
1. Disconnect appliance with its appliance main gas valve (control valve) and equipment shutoff valve from gas supply piping system. Pressures in excess of 1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where equipment shutoff valve was connected.
3. Pressurize supply piping system by either opening propane/LP supply tank valve for propane/LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air.
4. Check all joints of gas supply piping system. Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve to gas supply. Check reconnected fit­tings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 17).
2. Pressurize supply piping system by either opening propane/LP supply tank valve for propane/LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air.
3. Check all joints from gas meter for natural gas (see Figure 18) or propane/LP supply tank for propane/LP gas, to equipment shutoff valve (see Figure 19). Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.
4. Correct all leaks at once.
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PRESSURE TESTING HEATER GAS CONNECTIONS
1. Open equipment shutoff valve (see Figure 17).
2. For natural gas open main gas valve located on or near gas meter. For propane/LP gas open propane/LP supply tank valve.
3. Make sure control knob of heater is in the OFF position.
4. Check all joints from equipment shutoff valve to thermostat gas valve (see Figure 18 or 19). Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
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6. Light heater (see Operating Heater, page 14). Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli- ance, page 15).
8. Connect ignitor wire and replace front panel.
Equipment Shutoff Valve
Figure 17 - Equipment Shutoff Valve
Gas Meter
Equipment Shutoff Valve
Figure 18 - Checking Gas Joints for
Propane/LP Supply Tank
Figure 19 - Checking Gas Joints for
Natural Gas
Equipment Shutoff Valve
Propane/LP Gas
Open
Closed
INSTALLATION
Continued
CONNECTING TO ELECTRICAL SUPPLY
WARNING: Fan accessory must be grounded. Fan comes with a three-prong, grounding plug as shown in Figure 20. The plug is your protection against electrical shock. Plug it into a standard, three-hole, grounded, outlet. If cord needs replacing, use only a cord with a three­prong, grounding plug.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and danger ous operation (see page 22).
Grounded Outlet
Grounding Plug
Figure 20 - Grounding Plug
EXTENSION CORD
Use extension cord if needed. The cord must have a three-prong, grounding plug and a three-hole re ceptacle. Make sure cord is in good shape. It must be heavy enough to carry the current needed. An undersized cord will cause a drop in line voltage. This will result in loss of power and overheating. Use a No. 16 AWG cord for lengths less than 50 feet (15.24 m) .
CAUTION: Verify proper op­eration after servicing.
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Operating Fan
The blower is connected to a thermostat. When unit heats up, the fan will operate. A few minutes after unit cycles off or is turned off, the fan will shut off. The fan will cycle on and off in this manner. Note: If you have a heater with a thermostat, the heater and fan will not turn off and on at exactly the same time. Fan cycle times will vary with the heat setting selected.

OPERATING HEATER

FOR YOUR SAFETY READ
BEFORE LIGHTING
WARNING: If you do not fol­low these instructions exactly, a fire or explosion may result causing property damage, per­sonal injury or loss of life.
A. This appliance has a pilot which must be
lighted by hand. When lighting the pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighborʼs phone. Follow the gas supplierʼs instructions.
• If you cannot reach your gas supplier, call the fire department.
C. Use only your hand to push in or turn the
gas control knob. Never use tools. If the knob will not push in or turn by hand, donʼt try to repair it, call a qualified service technician. Force or attempted repair may
-
result in a fire or explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.
14
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116292-01D
O
F
F
P
I
L
O
T
OPERATING HEATER
OFF
O
F
F
P
I
L
O
T
Continued
LIGHTING
INSTRUCTIONS
CAUTION: Do not try to ad­just heating levels by using the equipment shutoff valve.
1. STOP! Read the safety information, page 14.
2. Make sure equipment shutoff valve is fully open.
3. Turn off any electric power to the appliance if service is to be performed.
4. Turn control knob clockwise to the OFF position.
Figure 21 - Control Knob In The OFF
Position
5. Wait five minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! Follow “B” in the safety information, page 14. If you donʼt smell gas, go to the next step.
6. Turn control knob counterclockwise to the PILOT position. Press in control knob for five (5) seconds.
7.
With control knob pressed in, push down and release ignitor button. This will light pilot.
Piezo Ignitor
Figure 22 - Ignitor Buttons
Electronic Ignitor
Thermocouple
Ignitor Electrode
Pilot Burner
The pilot is attached to the front of burner. Note: You may be running this heater for the first time after hooking 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. If needed, keep pressing ignitor button until pilot lights. If ignitor does not light pilot, refer to Troubleshooting, page 18 or contact a qualified service person or gas supplier for repairs. Until repairs are made, light pilot with match. To light pilot with match, see Manual Lighting Procedure, page 16.
8. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob.
• If control knob does not pop up when re-
leased, contact a qualified service person or gas supplier for repairs.
Note: If pilot goes out, repeat steps 4 thru 7.
Thermostat models have a safety interlock system. Wait one (1) minute before lighting pilot again.
9. Turn control knob counterclockwise to desired heating level. The main burner should light.
WARNING: Always operate manual control heaters at the locked positions. Operation between these positions may create a possible health hazard if used in a poorly ventilated room. Read owner’s manual for complete instructions.
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Figure 23 - Pilot (actual pilot may vary)
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
to the
OFF position.
2. Turn off all electric power to the appliance if service is to be performed.
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise to the PILOT position.
THERMOSTAT CONTROL
OPERATION
The thermostatic control used on these models differs from standard thermostats. Standard thermostats simply turn on and off the burner. The thermostat used on this heater senses the room temperature. The thermostat adjusts the amount of gas flow to the burner. This increases or decreases the burner flame height. At times the room may exceed the set temperature. If so, the burner will shut off. The burner will cycle back on when room temperature drops below the set temperature. The control knob can be set to any heat level between 1 and 5. Selecting the 5 setting will cause the burner to remain fully on without modulating down in most cases.
OPERATING HEATER
Continued
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 tem peratures, etc.). Frequent use of your heater will let you determine your own comfort levels.
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 4, page 8).
2. Follow steps 1 through 7 under Lighting Instructions, page 15.
3. With control knob pressed in, strike match. Hold match to pilot until pilot lights.
4. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. Now follow step 9, under Lighting Instructions, page 15.
5. Replace front panel.

INSPECTING HEATER

Check pilot flame pattern and burner flame pat­tern often.
PILOT FLAME PATTERN
Figure 24 shows a correct pilot flame pattern. Figure 25 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the thermocouple to cool. When the thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 25
turn heater off (see To Turn Off Gas to Appliance, page 15)
• see Troubleshooting, page 18
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 Flame
Pilot Burner
Thermocouple
Yellow Flame
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Figure 25 - Incorrect Pilot Flame Pattern
BURNER FLAME PATTERN
WARNING: If yellow tipping occurs, your heater could pro­duce increased levels of carbon monoxide.
NOTICE: Do not mistake orange flames with yellow tipping. Dirt or other fine particles enter the heater and burn causing brief patches of orange flame.
Figure 26 shows a correct burner flame pattern. Figure 27 shows an incorrect burner flame pattern. The incorrect burner flame pattern shows yellow tipping of the flame. It also shows the flame higher than 1/2 the deflector panel height.
If burner flame pattern is incorrect, as shown in Figure 27
• turn heater off (see To Turn Off Gas To Appli ance, page 15)
• see Troubleshooting
Figure 26 - Correct Burner Flame Pattern
Figure 27 - Incorrect Burner Flame
, page 18
Pattern
Pilot Burner
Blue Flame
1
/2 Deflector Height
Yellow Tipping
1
2
/ Deflector Height
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Figure 24 - Correct Pilot Flame Pattern
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116292-01D
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep control areas, burner and circu­lating air passageways of heater clean. Inspect these areas of heater before each use. Have heater inspected yearly by a qualified service person. Heater may need more frequent clean­ing due to excessive lint from carpeting, bedding material, pet hair, etc.
WARNING: Failure to keep the primary air opening(s) of the burner(s) clean may result in sooting and property damage.
ODS/PILOT AND BURNER
Use a vacuum cleaner, pressurized air or small, soft bristled brush to clean.
BURNER PILOT AIR INLET
The primary air inlet holes allow the proper amount of air to mix with the gas. This provides a clean burning flame. Keep these holes clear of dust, dirt and lint. Clean these air inlet holes prior to each heating season. Blocked air holes will create soot. We recommend that you clean the unit every three months during operation and have heater inspected yearly by a qualified service person.
We also recommend that you keep the burner tube and pilot assembly clean and free of dust and dirt. To clean these parts we recommend using compressed air no greater than 30 PSI. Your local computer store, hardware store or home center may carry compressed air in a can. You can use a vacuum cleaner in the blow position. If using com pressed air in a can, please follow the directions on the can. If you don't follow directions on the can, you could damage the pilot assembly.
1. Shut off the unit, including the pilot. Allow the unit to cool for at least thirty minutes.
2. Inspect burner, pilot for dust and dirt.
3. Blow air through the ports/slots and holes in the burner.
4. Never insert objects into the pilot tube.
Clean the pilot assembly also. A yellow tip on the pilot flame indicates dust and dirt in the pilot as sembly. There is a small pilot air inlet about two inches from where the pilot flame comes out of the pilot assembly (see Figure 28). With the unit off, lightly blow air through the air inlet. You may blow through a drinking straw if compressed air is not available.
Pilot Assembly
Pilot Air Inlet
Figure 28 - Pilot Inlet Air - Propane/LP
Pilot Shown (Actual Pilot May Vary from
Illustration)
CABINET
Air Passageways
Use a vacuum cleaner or pressurized air to clean.
Exterior and Dark Acrylic Front Glass
Use a soft cloth dampened with a mild soap and water mixture. Wipe the cabinet to remove dust.
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