Desa HDR18NT, LCR16PT, LCR30NT, HDR16PT, HDR26PT User Manual

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Desa HDR18NT, LCR16PT, LCR30NT, HDR16PT, HDR26PT User Manual

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

Models

LCR16PT, LCR18NT, LCR26PT, LCR30NT

HDR16PT, HDR18NT, HDR26PT, HDR30NT

WARNING: If the information in this manual is not followedexactly,afireorexplosionmayresultcausing property damage, personal injury or loss of life.

Do not store or use gasoline or other flammable vaporsandliquidsinthevicinityofthisoranyother 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.

INSTALLER: Leave this manual with the appliance. CONSUMER: Retain this manual for future reference.

For more information, visit www.desatech.com

Table of Contents

Safety...................................................................

2

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

17

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

4

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

17

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

4

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

18

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

4

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

21

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

4

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

21

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

5

Parts...................................................................

22

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

7

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

25

Operation...........................................................

13

Service Publications...........................................

25

Inspecting Heater...............................................

16

Parts Central......................................................

25

Cleaning.............................................................

16

Warranty.............................................................

26

Safety

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,serviceagencyor the gas supplier.

WARNING: This is an unvented gas-fired heater. Itusesair(oxygen)fromthe roominwhichitisinstalled. Provisions for adequate combustion and ventilation air must be provided.

RefertoAirforCombustion and Ventilation section on page 5 of this manual.

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.

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

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

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!

Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness or nausea. If you have these signs, the heater may not be working properly. Get fresh air at once! Have heater serviced. Some people are more affected by carbon monoxide than others.These include pregnant women, people with heart or lung disease or anemia, those under the influence of alcohol and those at high altitudes.

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Safety

Continued

Natural and Propane/LP Gas: Natural and Propane/LPgases are odorless.An odor-mak- ing agent is added to these gases. The odor helps you detect a gas leak. However, the odor addedtothegascanfade.Gasmaybepresent 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:Donotuseablower insert, heat exchanger insert orotheraccessorynotapproved 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 neighbor’s phone. Follow the gas supplier’s instructions

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

5.Always run heater with plaque control knob at the 1, 2, 3 or 4 locked positions. Never set control knob between locked positions. Poor combustion and higher levels of carbon monoxide may result.

6.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.

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

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

9.Do not run heater

where flammable liquids or vapors are used or stored

under dusty conditions

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 unplug heater and let cool before servicing. Only a qualified service person should service and repair heater.

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SAFETY

Continued

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

13.To prevent performance problems, do not usepropane/LPfueltankoflessthan100lbs. (45 kg) capacity.

14.Before using furniture polish, wax, carpet cleanerorsimilarproducts,turnheateroff.If heated,thevaporsfromtheseproductsmay createawhitepowderresiduewithinburner box or on adjacent walls or furniture.

15.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 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

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.

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 return to where you bought heater.

Product

Identification

Control Knob

Ignitor Button

Grill

Guard

Plaque

Front Panel

Heater Cabinet

Figure 1 - Vent-Free Gas 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.

Piezo Ignition System

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

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: 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.

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

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

Exhaust fans, fireplaces, clothes dryers and fuelburningappliancesdrawairfromthehouse 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,atpenetrationsforplumbing,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 FreshAir 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 there are doorless passageways or ventilation grills 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 heaterplusanyadjoiningroomswithdoorlesspassageways 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: Spacesize20ft.(6.1m)(length)x16 ft.(4.88m)(width)x8ft.(2.44m)(ceilingheight) = 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

_ __________ Btu/Hr

Gas water heater*

_ __________ Btu/Hr

Gas furnace

_ __________ Btu/Hr

Vented gas heater

_ __________ Btu/Hr

Gas fireplace logs

_ __________ Btu/Hr

Other gas appliances*+__________ Btu/Hr Total =_ _________ Btu/Hr

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

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 can support)

_ _______ Btu/Hr (actual amount 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.Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From Inside Building.

B.Vent room directly to the outdoors. See

Ventilation Air From Outdoors, page 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:Iftheareainwhich 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 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" (30.5 cm) of the ceiling and one within 12" (30.5 cm) of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2, page 7). You can also remove door into adjoining room (see option 3, Figure 2, page 7). Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

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AIR FOR COMBUSTION AND VENTILATION

Continued

 

12"

 

Ventilation Grills

Ventilation

Into Adjoining Room,

Option 2

Grills into

Or

Adjoining

Remove

Room,

Door into

Option 1

Adjoining

 

Room,

 

Option 3

 

12"

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" (30.5 cm) of the ceiling and one within 12" (30.5 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 thermo- stat-controlled power vent. Heated air entering 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: This heater is intended for use as supplemental heat. Use thisheateralongwithyourprimary heating system. Do not install this heaterasyourprimaryheatsource. Ifyouhaveacentralheatingsystem, you may run system’s circulating blowerwhileusingheater.Thiswill help circulate the heat throughout the house. In the event of a power outage,youcanusethisheateras 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:Thisapplianceis equipped for either natural gas or propane/LPgas but not both. Gas type is indicated on the ratingplate.Fieldconversionisnot permitted.

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 CSAdesign-certified equipment shutoff valve can be purchased from your dealer. See Accessories, page 21.

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Installation

Continued

LOCATING HEATER

This heater is designed to be mounted on a wall.

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 floor, away from a wall.An optional floor mounting stand is needed. Purchase the floor mounting stand from your dealer. See Accessories, page 21.

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" (91.5 cm) 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

heater pilot and burner must be at least 18" (45.7 cm) above floor

locate heater where moving vehicle will not hit it

CAUTION:Thisheatercreates warmaircurrents.Thesecurrents move heat to wall surfaces next to heater. Installing heater next tovinylorclothwallcoveringsor operatingheaterwhereimpurities

(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 humidity is experienced, a dehumidifier may be used to help lower the water vapor content in the air.

For convenience and efficiency, install heater

where there is easy access for operation, inspection and service

in coldest part of room

If planning to use fan, locate heater near an electrical outlet.

CEILING

 

 

10" (25.4 cm)

 

36"

 

 

Minimum

 

(91.5 cm)

From

 

Minimum

Sides Of

 

 

Heater

 

 

 

 

Right

Left

 

Side

 

 

Side

 

 

 

 

Minimum To

 

 

Top Surface

 

 

Of Carpeting,

36"

2" (5.1 cm) Tile Or Other

 

Combustible

(91.5 cm)

FLOOR

Material

Figure 4 - Mounting Clearances As

Viewed From Front of Heater

THERMOSTAT SENSING BULB

The thermostat sensing bulb has been placed below the heater.

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

2.Snap clamp into upper mounting hole as showninFigure5.Mountingholeislocated 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

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Installation

Continued

INSTALLING HEATER TO WALL

Mounting Bracket

Locate mounting bracket in heater carton. 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.

Front Panel

Screw

Figure 7 - Removing Front Panel Of

Heater

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 are 14" (35.6 cm) 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.

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:Maintainminimum clearances shown in Figure 8. If youcan,providegreaterclearances from floor and joining wall.

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 wall.

 

12"

14" (35.6 cm)

 

 

(30.4

 

 

 

cm)

 

 

AdjoiningWall

Min.

 

 

Only Insert Mounting

18 3/4"

Screws Through Last

(47.6 cm)

 

 

Hole On Each End

Min.

 

 

 

Floor

3 Plaque Heater

16"

14" (35.6 cm)

(40.6 cm)

 

Min.

 

AdjoiningWall

Only Insert Mounting

18 3/4"

Screws Through Last

(47.6 cm)

 

Hole On Each End

Min.

Floor

5 Plaque Heater

Figure 8 - Mounting Bracket Clearances

Attaching Mounting Bracket To Wall

Note: Wall anchors, mounting screws and spacers 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. 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.

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Installation

Continued

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" (2.5 cm) 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" (1.3 cm) 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"(1.3cm)thick]orsolidwalls,donotpop 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.

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 (see page 11).

Figure 9 - Folding

Figure 10 - Popping

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

Mounting Bracket (attached

to wall) Stand-Out Tab

Figure 11 - 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 12).

Front View

Wall

Heater

Spacer

Side View

Figure 12 - Installing Bottom Mounting

Screws

Mounting heater to floor

With optional floor kit

Mounting Base Feet to Heater

Note: A 90° elbow is required for mounting this unit and must be installed BEFORE base feet to provide proper clearance (see Figure 15, page 12).

1.Layheatercabinetonitsbackonatablewith the heater bottom overhanging table edge.

2.Apply pipe joint sealant lightly to male NPT threads of elbow. Hold pressure regulator with a wrench when connecting elbow. Do not overtighten elbow to regulator. Regulator body could be damaged.

10

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Installation

Continued

3.Alignholesinbasefootwithmountingholes on bottom of cabinet (see Figure 13).

4.Secure base foot to heater using sheet metal screws.

5.Repeat for other side.

Wood

Screw

 

Sheet

 

Metal

Base Foot

Screw

Figure 13 - Installing Base Feet (actual heater may vary from illustration)

Mounting Base Feet to Floor

1.Remove front panel (see Removing Front Panel of Heater, page 9).

2.Position heater with base feet in desired location. Mark holes for drilling. Remove heater with base.

3.For carpeted floors, make a small cut with a sharp knife at marked locations prior to drilling. If mounting base to a wood floor, drill 1/8" diameter hole, 3/4" deep. (Do not use anchors in wood floors).

If mounting base to a concrete floor, drill with1/4"diameterconcretedrillbit,13/8" into floor. Insert anchors completely into holes.

4.Reposition heater with base feet over holes. Secure base to floor with wood screws. See Figure 13.

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:Fornaturalgas,never connect heater to private (non-util- ity)gaswells.Thisgasiscommonly 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.

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 14. 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

16-18,000 Btu/hr models - 3/8" or greater

26-30,000 Btu/hr models - 1/2" or greater

Installation must include equipment shutoff valve, union and plugged 1/8" NPTtap. Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from heater (see Figure 15, page 12).

Propane/LP

Supply Tank External

Regulator

Vent

Pointing

Down

Figure 14 - External Regulator With Vent

Pointing Down

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11

Installation

Continued

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 sealantthatisresistanttoliquid petroleum (LP) gas.

Pressure

 

 

 

Regulator

 

 

3/8" NPT

 

 

 

 

Regulator

 

 

Pipe

Bracket

 

 

Nipple

Heater

 

 

Ground

Cabinet

 

 

Joint

Connection*

 

 

 

Union

Tee Joint

 

Equipment

 

 

 

 

 

 

 

Reducer

 

Shutoff

 

Bushing to

 

Valve*

Gauge

1/8" NPT

 

Natural Gas

Plug Tap

Min.

Meter (7" W.C.

Test

1/8" NPT

3"

From Gas

 

 

 

to 10.5" W.C.

 

 

 

 

 

Tee

Pipe

Cap

Pressure)

 

Propane/LP

 

Joint

Nipple

 

 

Sediment Trap

From External

 

Regulator

 

 

 

 

(11" W.C. to 14"

 

Refer to connector's

W.C. Pressure)

 

instructions

 

 

 

 

Flexline

 

 

See

3/8" NPT/ 1/2"

illustration

above for

Flare 90° Elbow

detail

 

Connection Using Flexline

Figure 15 - 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 21.

Install sediment trap in supply line as shown in Figure 15. 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.

CHECKING GAS CONNECTIONS

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

WARNING:Neveruseanopen flame to check for a leak.Apply a noncorrosive leak detection fluid toalljoints.Bubblesformingshow 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 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.

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Installation

Continued

4.Checkalljointsofgassupplypipingsystem. 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 16).

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 17) or propane/LP supply tank for propane/LP gas, to equipment shutoff valve (see Figure 18). 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 16).

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 17 or 18). Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak.

5.Correct all leaks at once.

6.Light heater (see Operation). Check all other internal joints for leaks.

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

8.Replace front panel.

Equipment

Open

 

Shutoff Valve

 

 

Closed

Figure 16 - Equipment Shutoff Valve

Thermostat Gas Valve

Gas

Meter

Equipment

Shutoff

Valve

Figure 17 - Checking Gas Joints for Natural Gas

Thermostat Gas Valve

Propane/LP

Supply Tank

Equipment

Shutoff

Valve

Figure 18 - Checking Gas Joints for Propane/LP Gas

Operation

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.

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Operation

Continued

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance.

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

Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

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

C.Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand,don’ttrytorepairit,callaqualified 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 aqualifiedservicetechniciantoinspect theapplianceandtoreplaceany partof the control system and any gas control which has been under water.

LIGHTING

INSTRUCTIONS

1.STOP! Read the safety information starting on page 13.

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.

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 starting on page

13. If you don’t 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. 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 15.

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

If control knob does not pop up when released, contact a qualified service person or gas supplier for repairs.

Note: If pilot goes out, repeat steps 4 thru 7. Wait one (1) minute before lighting pilot again.

9.Turn control knob counterclockwise to desired heating level. The main burner should light.

10.To leave pilot lit and shut off burners only,

turn control knob clockwise to the PILOT position.

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

Ignitor

Control

Button

Knob

 

 

F

 

F

 

O

Figure 19 - Control Knob In The OFF

Position

Thermocouple

Ignitor Electrode

Pilot Burner

Figure 20 - Pilot

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Operation

Continued

TO SELECT

HEATING LEVEL

WARNING: When running heater,setcontrolknobatLOW, MED or HI locked positions. Never set control knob between lockedpositions.Poorcombustion and higher levels of carbon monoxide may result.

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

Turn thermostat control knob counterclockwise to the desired heating level. The main burner should light. Set control knob to any heat level between 1 and 5 (see Figure 21).

Control Knob

 

 

Burners

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 21 - Burner Patterns

TO TURN OFF GAS

TO APPLIANCE

1.Turn control knob clockwise to the OFF position.

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

3.Close equipment shutoff valve (see Figure 16, page 13).

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. All plaques will turn off and on.

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.) Frequent use of your heater will let you determine your own comfort levels.

MANUAL LIGHTING

PROCEDURE

1.Remove front panel (see Figure 7, page 9).

2.Follow steps 1 through 7 under Lighting Instructions, page 14.

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 14.

5.Replace front panel.

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Inspecting Heater

Check pilot flame pattern and burner flame pattern often.

PILOT FLAME PATTERN

Figure 22 shows a correct pilot flame pattern. Figure 23 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 23

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.

Blue Flame

Pilot Burner

Thermocouple

Figure 22 - Correct Pilot Flame Pattern

Yellow Flame

Thermocouple

Pilot Burner

 

Figure 23 - Incorrect Pilot Flame Pattern

BURNER FLAME PATTERN

Figure 24 shows a correct burner flame pattern. Figure 25 shows an incorrect burner flame pattern.

If burner 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

Figure 24 - Correct Burner Flame Pattern

Figure 25 - Incorrect Burner Flame

Pattern

Cleaning

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.

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Cleaning

Continued

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. If using compressed air in a can, please follow the directions on the can. If you don't follow directions on the can, you could damage the pilot assembly.

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

2.Inspect burner, pilot 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 assembly. There is a small pilot air inlet about two inches from where the pilot flame comes out of the pilot assembly (see Figure 26). 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 26 - Pilot Air Inlet

CABINET

Air Passageways

Use pressurized air to clean.

Exterior

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

Service Hints

When Gas Pressure Is Too Low

pilot will not stay lit

burner will have delayed ignition

heater will not produce specified heat

propane/LP gas supply may be low

You may feel your gas pressure is too low. If so, contact your local natural or propane/LP gas supplier.

Technical Service

You may have further questions about installation, operation or troubleshooting. If so, contact DESA Heating Products’ Technical Service Department at 1-866-672-6040. When calling please have your model and serial numbers of your heater ready.

YoucanalsovisitDESAHeatingProducts’technical service web site at www.desatech.com.

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