Desa VN30TA, VN18TA, VN18A, VP26TA, VP26A User Manual

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UNVENTED (VENT-FREE) INFRARED GAS HEATER

SAFETY INFORMATION AND INSTALLATION MANUAL

Model VN30A Shown

VN18A, VN18TA, VP16A, VP16TA, VP26A, VP26TA

VN30A, VN30TA, VP16ITA, VP22ITA

WARNING: If the information in this manual is not followed exactly, a ﬁre or explosion may result causing property damage, personal injury or loss of life.

— Do not store or use gasoline or other ﬂammable

vapors and liquids in the vicinity of this or any other appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

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

• 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 indicated on the rating plate. This appliance is not convertible for use with other gases.

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

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

Sellers of unvented propane or natural gas-ﬁred supplemental room heaters shall provide to each purchaser a copy of 527 CMR 30 upon sale of the unit.

Vent-free gas products are prohibited for bedroom and bathroom installation in the Common wealth of Massachusetts.

TABLE OF CONTENTS

Safety Information ............................................... 3

Local Codes ........................................................ 4

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

Unpacking ........................................................... 4

Product Features ................................................. 4

Air For Combustion and Ventilation ..................... 5

Installation ........................................................... 7

Operating Heater ............................................... 14

Inspecting Heater .............................................. 18

Cleaning and Maintenance ................................ 19

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Troubleshooting ................................................. 20

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

Illustrated Parts Breakdown and Parts List ....... 24

Replacement Parts ............................................ 32

Service Publications .......................................... 32

Service Hints ..................................................... 32

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

Accessories ....................................................... 33

Parts Central ..................................................... 33

Warranty Information ...........................Back Cover

113052-01D

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 be fore tr ying to assemb le, 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 inﬂu ence of alcohol and those at high altitudes.

Natural and Propane/LP Gas: Natural and Propane/

gases are odorless. An odor-making agent is added to these gases. The odor helps you detect a gas leak. However, the odor added to the gas can fade. Gas may be present even though no odor exists.

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 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.

Make sure grill guard is in place before running heater.

Keep the appliance area clear

and free from combustible ma terials, 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 ap pliance 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 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 neigh borʼs phone. Fol low the gas supplierʼs instructions

• If you cannot reach your gas supplier, call

the ﬁre department

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3113052-01D

SAFETY INFORMATION

Continued

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.

12. Operating heater above elevations of 4,500 feet could cause pilot outage.

13. To prevent performance problems, do not use propane/LP fuel tank of less than 100 lbs. capacity.

14. 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.

15.

Provide adequ ate clearance s around air openings.

LOCAL CODES

Install and use heater with care. Follow all local codes. In the absence of local codes, use the lat est edition of The 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

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PRODUCT

IDENTIFICATION

Ignitor Button

Heater Cabinet

Figure 1 - Vent-Free Gas Heater

Control Knob

Plaque

Front Panel

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 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 an electronic ignitor to light heater fuel supply.

THERMOSTATIC HEAT CONTROL

(Thermostat Models Only)

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.

113052-01D

Grill Guard

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 (6 x 10 less with openings gasketed or sealed and

b. weather stripping has been added on

openable windows and doors and

c. caulking or sealants are applied to

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

If your home meets all of these three cri teria, you must provide additional fresh air. See Ventilation Air From Outdoors, page 7.

If your home does not meet all of the three

criteria above, proceed to Determining Fresh-Air Flow For Heater Location.

Conﬁned and Unconﬁned Space

The National Fuel Gas Code, ANSI Z223.1/NFPA 54 deﬁnes a conﬁned space as a space whose

volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m 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 m

per kw) of the aggregate input rating of 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.

-11

kg per pa-sec-m2) or

per kw) of the aggregate input

DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION

Determining if You Have a Conﬁned or Unconﬁned Space

Use this work sheet to determine if you have a conﬁned or unconﬁned space.

Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.

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5113052-01D

Or Remove Door into Adjoining

Room,

Option 3

Ventilation Grills

Into Adjoining Room,

Option

12"

Ventilation

Grills

into Adjoining

Room,

Option 1

AIR FOR COMBUSTION

AND VENTILATION

Continued

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

Length x Width x Height =__________cu. ft.

(volume of space)

Example: Space size 20 ft. (length) x 16 ft.

(width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)

If additional ventilation to adjoining room is

supplied with grills or openings, add the volume of these rooms to the total volume of the space.

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

__________ (volume of space) x 20 = (Maxi-

mum 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 ___________ 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 20,000 60,000

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 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.

B. Vent room directly to the outdoors. See Ventila

tion Air From Outdoors, page 7.

Btu/Hr Btu/Hr Btu/Hr Btu/Hr Btu/Hr Btu/Hr Btu/Hr

Btu/Hr Btu/Hr Btu/Hr

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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 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.

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" 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.

Figure 2 - Ventilation Air from Inside

Building

113052-01D

AIR FOR COMBUSTION

Outlet Air

ntilated

Attic

Outlet

Inlet Air

ntilated

Crawl Space

To Crawl Space

To Attic

Minimum From Sides Of Heater

36"

FLOOR

CEILING

Minimum

Minimum To Top Surface Of Carpeting, Tile Or Other Combustible Material

Left Side

Right Side

10"

AND VENTILATION

Continued

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent openings: one within 12" 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 thermostatcontrolled power vent. Heated air entering the attic will activate the power vent.

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

INSTALLATION ITEMS

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

• 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

Accessories, page 33.

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. A wall mounting bracket and ﬂoor base stand are included with this heater. Determine which method is best for your application.

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.

Figure 4 - Mounting Clearances As

Viewed From Front of Heater

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7113052-01D

INSTALLATION

Continued

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 inches 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 inches above ﬂoor

• locate heater where moving

vehicle will not hit it

CAUTION: This heater creates warm air currents. These currents move heat to wall sur faces 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 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, inspec tion and service

• in coldest part of room

An optional fan kit is available from your dealer. See Accessories, page 33. If planning to use fan, locate heater near an electrical outlet.

THERMOSTAT SENSING BULB

(Thermostat Models Only)

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 shown 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

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

Figure 7 - Removing Front Panel Of

Heater

Screw

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113052-01D

INSTALLATION

14"

12"

Min.

Ad joi ni ng Wa ll

Only Insert Mounting Screws Through Last

Hole On Each End

Floor

25 3/4"

Optional

19 3/4"

Min.

16"

Min.

14"

12"

Min.

Ad joi ni ng Wa ll

14"

Ad joi ni ng Wa ll

Only Insert Mounting

Screws Through Last

Hole On Each End

Only Insert Mounting Screws Through Last

Hole On Each End

Floor

25 3/4"

Optional

19 3/4"

Min.

25 3/4"

Optional

19 3/4"

Min.

Continued

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 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.

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

8. If you can, provide greater clearances 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.

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.

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.

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4 and 5 Plaque Heaters

3 Plaque Heater

9113052-01D

INSTALLATION

Side View

Front View

Continued

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 - Folding Anchor

Installing Bottom Mounting Screws

1. Locate two bottom mounting holes. These holes are near bottom on back panel of heater (see Figure 12).

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

, page 9.

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 pages 12 and 13).

Figure 10 - Popping 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 mount ing bracket.

Horizontal Slots

Mounting Bracket (attached

Stand-Out Tab

to wall)

Figure 11 - Mounting Heater Onto

Mounting Bracket

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Heater

Wall

Spacer

Figure 12 - Installing Bottom Mounting

Screws

113052-01D

INSTALLATION

Continued

MOUNTING HEATER TO FLOOR

Mounting Base Feet to Heater

1. Lay heater cabinet on its back on a table with the heater bottom overhanging the table edge.

2. Align holes in base foot with mounting holes on bottom of cabinet (see Figure 13).

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

4. Repeat for other side.

Mounting Base Feet to Floor (Where required by local code)

1. Remove front cover (see Removing Front Panel of Heater,

2. Position heater with base feet in desired loca tion. 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 drill ing. If mounting base to a wood ﬂoor, drill 1/8 inch diameter hole, 3/4 inch deep. (Do not use anchors in wood ﬂoors).

If mounting base to a concrete ﬂoor, drill

with 1/4 inch diameter concrete drill bit, 1 inches 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.

Sheet Metal Screw

page 8).

Wood Screw

Base Foot

CONNECTING TO GAS SUPPLY

WARNING: This appliance requires a 3/8" NPT (National 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 (nonutility) gas wells. This gas is com monly 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 inches of water. If gas line pressure is higher, heater regula

tor 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.

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 14. Pointing the vent down protects it from freezing rain or sleet.

Propane/LP Supply Tank

External Regulator

Figure 13 - Installing Base Feet

113052-01D

Figure 14 - External Regulator With Vent

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Vent Pointing Down

Pointing Down

INSTALLATION

Continued

CAUTION: Use only new, black iron or steel pipe. Internally-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

VN18A, VN18TA, VP16A, VP16TA and

VP16ITA - 3/8" or greater

VN30A, VN30TA, VP26A, VP26TA and

VP22ITA - 1/2" or greater

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

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.

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.

Pressure Regulator

Regulator Bracket

Heater Cabinet

Tee Joint

Reducer Bushing to 1/8" NPT

1/8" NPT Plug Tap

Test Gauge Connection*

Tee Pipe Cap Joint Nipple

Sediment Trap

* 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 33.

Figure 15 - Gas Connection

3" Min.

3/8" NPT Pipe Nipple

Ground Joint Union

Equipment Shutoff Valve *

Natural Gas

From Gas Meter (7" W.C. to 10.5" W.C. Pressure)

Propane/LP

From External Regulator (11" W.C. to 14" W.C. 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.

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.

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113052-01D

INSTALLATION

Continued

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 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 Operating Heater, page 14 ). Check all other internal joints for leaks.

7. Turn off heater (see To Turn Off Gas to Ap pliance, page 15 or 17 depending on your model).

8. Replace front panel.

Equipment Shutoff Valve

Figure 16 - Equipment Shutoff Valve

Thermostat Gas Valve

Gas Meter

Figure 17 - Checking Gas Joints for

Natural Gas

Thermostat Gas Valve

Propane/LP Supply Tank

Figure 18 - Checking Gas Joints for

Propane/LP Gas

Open

Closed

Equipment Shutoff Valve

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13113052-01D

OPERATING HEATER

OFF

NON-THERMOSTAT MODELS

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 tech nician or gas supplier. 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.

LIGHTING

INSTRUCTIONS

1. STOP! Read the safety information above.

2. Make sure equipment shutoff valve is fully open.

3. Turn control knob clockwise OFF position.

4. 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 above. If you donʼt smell gas, go to the next step.

to the

5. Turn control knob to PILOT/IGN and press in.

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 control knob does not pop up when

released, contact a qualified service person or gas supplier for repairs.

6. With control knob pressed in, push down and release ignitor button. This will light pilot. The pilot is attached to the front of burner. If needed, keep pressing ignitor button until pilot lights.

If pilot does not light

• turn control knob clockwise to

the OFF position

• repeat steps 5 and 6

If pilot does not stay lit after several tries

• refer to Troubleshooting

• contact a qualiﬁed service person or gas

supplier for repairs

Until repairs are made, light pilot with

match . To light pilot wi th ma tch, see Manual Lighting Procedure, page 15.

7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds, release control knob. Note: If pilot goes out, repeat steps 3 through 7.

Ignitor Button

Figure 19 - Control Knob In The OFF Position for Non-Thermostat Models

Thermocouple

Figure 20 - Pilot

, page 20

Control Knob

Ignitor Electrode

Pilot Burner

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113052-01D

OPERATING HEATER

Continued

TO SELECT

HEATING LEVEL

WARNING: When running heater, set control knob at LOW, MEDIUM or HIGH locked posi tions. Never set control knob between locked positions. Poor combustion and higher levels of carbon monoxide may result.

MANUAL LIGHTING

PROCEDURE

1. Remove front panel (see Figure 7, page 8).

2. Follow steps 1 through 5 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 8, under Lighting Instructions, page 14.

5. Replace front panel.

THERMOSTAT MODELS

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

Slightly press in control knob and turn counterclockwise positions (see Figure 21).

IMPORTANT: Release downward pressure while turning control knob. Control knob will lock at the desired position.

Control VN18A VN30A

Knob VP16A VP26A

Figure 21 - Burner Patterns for Non-

TO TURN OFF GAS

Shutting Off Heater

1. Turn control knob clockwise 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 PILOT position.

to the LOW, MED or HI

LOW

MED

OFF

Thermostat Models

TO APPLIANCE

to the

www.desatech.com

FOR YOUR SAFETY READ

BEFORE LIGHTING

WARNING: If you do not follow these instructions exactly, a ﬁre or explosion may result causing property damage, per

sonal 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

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.

15113052-01D

OPERATING HEATER

Continued

LIGHTING

INSTRUCTIONS

1. STOP! Read the safety information, page 15, column 2.

2. Make sure equipment shutoff valve is fully open.

3. Turn thermostat control knob clockwise

4. Wait ﬁve minutes to clear out any gas. Then

5. Turn thermostat control knob counter

Note: You may be running this heater for

6. Keep thermostat control knob pressed in while

If pilot does not light

Until repairs are made, light pilot with

7. Keep thermostat control knob pressed in

Note: If pi lot goe s out, repe at steps 3

to the OFF position (see Figure 22

or 23 for your model).

smell for gas, including near the ﬂoor. If you smell gas, STOP! Follow “B” in the safety information, page 15, column 2. If you donʼt smell gas, go to the next step.

clockwise to the PILOT position. Press in thermostat control knob for 5 sec onds (see Figure 22 or 23 for your model).

the ﬁrst time after hooking up to gas supply. If so, you may need to press in thermostat control knob for 30 seconds or more. This will allow air to bleed from the gas system.

• If thermostat control knob does not pop

up when released, contact a qualiﬁed ser vice person or gas supplier for repairs.

pushing down and releasing the ignitor button. This will light pilot. If necessary, continue to press ignitor button until pilot lights.

• turn thermostat control knob clockwise

to the OFF position

• repeat steps 5 and 6 If pilot does not stay lit after several tries

• refer to Troubleshooting

, page 20

• contact a qualiﬁed service person or gas

supplier

match . To light pilot wi th ma tch, see Manual Lighting Procedure, page 17.

for 30 seconds after lighting pilot. After 30 seconds, release control knob.

through 7. This heater has a safety interlock system. Wait one minute before lighting pilot again.

8. Turn thermostat control knob counterclockwise

to the desired heating level. For models, VP1 6TA, VN 18TA, VP26TA and VN30TA, the main burner should light. Set control knob to any heat level between 1 and 5 (see Figure 25). For infrastat models, the plaque directly above the pilot should light.

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

Ignitor Button

Figure 22 - Control Knob In The OFF

Position, Models VP16TA, VN18TA,

VP26TA, & VN30TA

Plaque Control Knob

Ignitor Button

Figure 23 - Thermostat Control Knob In The

OFF Position, Models VP16ITA & VP22ITA

Thermocouple

Figure 24 - Pilot

Control

Knob

VP16TA VN18TA

Control Knob

Thermostat Control Knob

Ignitor Electrode

Pilot Burner

VP26TA VN30TA

www.desatech.com

113052-01D

Figure 25 - Burner Patterns

OPERATING HEATER

Continued

TO SELECT

HEATING LEVEL

INFRASTAT MODELS VP16ITA AND VP22ITA ONLY

WARNING: When running heater, set 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.

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

1. Slightly press in plaque control knob on right side of heater and turn counterclock wise to the desired position.

IMPORTANT: Release downward pressure

while turning control knob. Control knob will lock at the desired position.

2. For standard models (T), turn thermostat control knob on left side of heater to any set ting between LO and HI. For infrastat models (ITA), set thermostat control knob at the 1, 2, 3 or 4, locked positions. Note: When burn ers cycle on, (from LO to HI or one locked positions to another) a “click” will be heard. When the burners light, a “whoosh” noise will be heard.

Plaque

Control Knob VP16ITA VP22ITA

TO TURN OFF GAS

TO APPLIANCE

Shutting Off Heater

1. Turn thermostat 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 thermostat control knob clockwise to the PILOT position.

THERMOSTAT

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 ex ceed the set temperature. If so, the burner will shut off. The burner will cycle back on when room temperature drops below the set tempera ture. For standard models (T), the control knob

can be set to any heating level between 1 and 5. All plaques will turn off and on. For infrastat models (ITA), the control knob can be set at the 1, 2, 3 or 4 locked positions for the desired comfort level. The number of plaques selected 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 tem perature (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 8).

2. Follow steps 1 through 5 under Lighting

Instructions, page 16.

3. With thermostat control knob pressed in,

strike match. Hold match to pilot until pilot lights.

4. Keep thermostat control knob pressed in

for 30 seconds after lighting pilot. After 30 seconds, release control knob. Follow step

Lighting Instructions, page 16.

8 under

5. Replace front panel.

Figure 26 - Burner Patterns, Models

VP16ITA and VP22ITA

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17113052-01D

INSPECTING HEATER

Check pilot ﬂame pattern and burner ﬂame pattern often.

PILOT FLAME PATTERN

Figure 27 shows a correct pilot ﬂame pattern. Figure 28 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 28

• turn heater off (see To Turn Off Gas to Ap pliance, page 15 or 17, depending on your model)

• see Troubleshooting

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

, page 20

Blue Flame

Pilot Burner

BURNER FLAME PATTERN

Figure 29 shows a correct burner ﬂame pattern. Figure 30 shows an incorrect burner ﬂame pattern.

If burner ﬂame pattern is incorrect, as shown in Figure 30

• turn heater off (see To Turn Off Gas to Ap pliance, page 15 or 17, depending on your model)

• see Troubleshooting

Figure 29 - Correct Burner Flame Pattern

, page 20

Figure 27 - Correct Pilot Flame Pattern

Yellow Flame

Thermocouple

Figure 28 - Incorrect Pilot Flame Pattern

Pilot Burner

www.desatech.com

Figure 30 - Incorrect Burner Flame

Pattern

113052-01D

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 donʼt follow directions on the can, you could damage the pilot assembly.

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

2. Inspect burner, pilot for dust and dirt.

3. Blow air 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 31). 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 31 - Pilot Air Inlet

CABINET

Air Passageways

• Use a vacuum cleaner or pressurized air to

clean.

Exterior

• Use a soft cloth dampened with a mild soap

and water mixture. Wipe the cabinet to remove dust.

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19113052-01D

TROUBLESHOOTING

WARNING: Turn off and unplug heater and let cool before servicing.

Only a qualiﬁed service person should service and repair heater.

CAUTION: Never use a wire, needle or similar object to clean

ODS/pilot. This can damage ODS/pilot unit.

Note: All troubleshooting items are listed in order of operation.

OBSERVED PROBLEM

When ignitor button is pressed in, there is no spark at ODS/ pilot

POSSIBLE CAUSE

1. Ignitor electrode positioned wrong

2. Ignitor electrode broken

3. Ignit or elec trode not con nected to ignitor cable

4. Ignitor cable pinched or wet

5. Broken ignitor cable

6. Bad ignitor

7. Battery not installed, battery po we r lo w or bat te ry not installed correctly (electronic ignition models only)

REMEDY

1. Replace pilot assembly

2. Replace pilot assembly

3. Reconnect ignitor cable

4. Free ignitor cable if pinched by any metal or tubing. Keep ignitor cable dry

5. Replace ignitor cable

6. Replace ignitor

7. Install new alkaline battery in electronic ignitor. Verify battery is installed correctly

When ignitor button is pressed in, there is a spark at ODS/Pilot but no ignition

1. Gas supply turned off or equip ment shutoff valve closed

2. Control knob not fully pressed in while pressing ignitor button (non-thermostat models only)

Thermostat control knob not

fully pressed in while pressing ignitor button (thermostat models only)

3. Air in ga s lines whe n in stalled

4. Depleted gas supply (propane/ LP gas)

5. ODS/pilot is clogged

6. Gas regulator setting is not correct

7. Thermostat control knob is not in pilot position (thermostat models only)

www.desatech.com

1. Turn on gas supply or open equipment shutoff valve

2. Turn to PILOT/IGN position. Fully press in control knob while pressing ignitor button (non-thermostat models only)

Fully press in thermostat

control knob while pressing ignit or button (t hermostat models only)

3. Continue holding down con trol knob. Repeat igniting op eration until air is removed

4. Contact local propane/LP gas company

5. Clean ODS/pilot (see Cleaning and Maintenance, page 19) or replace ODS/pilot assembly

6. Replace gas regulator

7. Turn thermostat control knob to pilot position

113052-01D

OBSERVED PROBLEM

ODS /pilot lights but flame goes out when control knob is released

Burner(s) does not light after ODS/pilot is lit

TROUBLESHOOTING

Continued

POSSIBLE CAUSE

Control knob not fully pressed in

2. Control knob not pressed in long enough

3. Equipment shutoff valve not fully open

4. Thermocou pl e connect ion loose at control valve

5. Pilot ﬂame not touching ther mocouple, which allows ther mocouple to cool, caus ing pilot flame to go out. This problem could be caused by one or both of the following:

A) Low gas pressure B) Dirty or partially clogged

ODS/pilot

6. Thermocouple damaged

7. Control valve damaged

8. Safety interlock system has bee n triggered (thermostat models only)

1. Burner oriﬁce(s) is clogged

2. Inlet gas pressure is too low

REMEDY

1. Press in control knob fully

2. After ODS/pilot lights, keep control knob pressed in 30 seconds

3. Fully open equipment shutoff valve

4. Hand tighten until snug, then tighten 1/4 turn more

5. A) Contact local natural or propane/LP gas company

B) Clean ODS/ pi lot (see

Cleaning and Maintenance

page 19) or replace ODS/pilot assembly

6. Replace pilot assembly

7. Replace control valve

8. Wait one minute for safety in terlock system to reset. Repeat ignition operation

1. Clean burner oriﬁce(s) (see

Cleaning and Maintenance

page 19) or replace burner oriﬁce(s)

2. Contact local natural or propane/LP gas company

Delayed ignition of burner(s)

Burner backﬁring during com bustion

Burner pl aque(s) does n ot glow

Slight smoke or odor during initial operation

1. Manifold pressure is too low

2. Burner oriﬁce(s) is clogged

1. Burner oriﬁce(s) is clogged or

damaged

2. Burner damaged

3. Gas regulator defective

1. Plaque damaged

2. Inlet gas pressure is too low

3. Control knob set betw een locked positions

1. Residues from manufacturing processes

www.desatech.com

1. Contact local natural or pro pane/LP gas company

2. Clean burner oriﬁce(s) (see

Cleaning and Maintenance

page 19) or replace burner oriﬁce(s)

1. Clean burner oriﬁce(s) (see

Cleaning and Maintenance

page 19) or replace burner oriﬁce(s)

2. Replace burner

3. Replace gas regulator

1. Replace burner

2. Contact local natural or pro pane/LP gas company

3. Turn control knob unti l it locks at desired setting

1. Problem will stop after a few hours of operation

21113052-01D

TROUBLESHOOTING

Continued

WARNING: 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.

IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes. These fumes may mix with combustion air and create odors.

OBSERVED PROBLEM

Heater produces a clicking/ticking noise just after burner is lit or shut off

POSSIBLE CAUSE

1. Metal expanding while heating or contracting while cooling

REMEDY

1. This is common with most heaters. If noise is excessive, contact qualiﬁed service person

White powder residue forming within burner box or on adjacent walls or furniture

Heater pr oduces un wanted odors

Heater shuts off in use (ODS operates)

Gas odor even when control knob is in OFF position

Gas odor during combustion

1. When heated, vapors from furniture polish, wax, carpet cleaner, etc., may turn into white powder residue

Heater burning vapors from paint, hair spray, glues, etc. See IMPORTANT statement above

2. Low fuel supply (propane/LP gas)

3. Ga s le ak. See War ni ng

statement at top of page

1. Not enough fresh air is avail able

2. Low line pressure

3. O D S / p i l ot i s pa rt ially clogged

1. Ga s le ak. See War ni ng

statement at top of page

2. Control valve defective

1. Foreign matter between con trol valve and burner

2. Ga s le ak. See War ni ng

statement at top of page

1. Turn heater off when using furniture polish, wax, carpet cleaners or similar products

1. Ventilate room. Stop using odor causing products while heater is running

2. Reﬁll supply tank

3. Locate and correct all leaks (see Checking Gas Connec tions, page 12)

1. Open window and/or door for

ventilation

2. Contact local natural or pro pane/LP gas company

3. Clean ODS/pilot (see Cleaning and Maintenance, page 19)

1. Locate and correct all leaks (see Checking Gas Connec tions, page 12)

2. Replace control valve

1. Take apart ga s tubing and

remove foreign matter

2. Locate and correct all leaks (see Checking Gas Connec

tions, page 12)

Moisture/condensation noticed on windows

1. Not enough combustion/ven tilation air

www.desatech.com

1. Refer to Fresh Air for Com

bustion and Ventilation requirements (page 5)

113052-01D

SPECIFICATIONS

VP16A, VP16TA VP16ITA VP26A, VP26TA VP22ITA

Btu (Variable) Type Gas Ignition Electronic Electronic Electronic Electronic Pressure Regulator Setting Inlet Gas Pressure* (in. of water)

Maximum 14" 14" 14" 14" Minimum 11" 11" 11" 11"

Dimensions, Inches (H x W x D) Heater 24.25 x 18.25 x 7 24.25 x 18.25 x 7 24.25 x 25.75 x 7 24.25 x 25.75 x 7 Carton 26.25 x 21.25 x 9 26.25 x 21.25 x 9 26.25 x 29 x 9 26.25 x 29 x 9

Weight (pounds) Heater 20 20 28 28 Shipping 25 25 33 33

Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).

* For purposes of input adjustment.

VN18A, VN18TA VN30A, VN30TA

Btu (Variable) Type Gas Natural Only Natural Only Ignition Electronic Electronic Pressure Regulator Setting Inlet Gas Pressure* (in. of water)

Maximum 10.5" 10.5" Minimum 7" 7"

Dimensions, Inches (H x W x D) Heater 24.25 x 18.25 x 7 24.25 x 25.75 x 7 Carton 26.25 x 21.25 x 9 26.25 x 29 x 9

Weight (pounds) Heater 20 28 Shipping 25 33

Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).

* For purposes of input adjustment.

6,000/11,000/16,000 6,000/16,000 6,000/16,000/26,000 6,500/22,000 Propane/LP Only Propane/LP Only Propane/LP Only Propane/LP Only

8" W.C. 8" W.C. 8" W.C. 8" W.C.

6,600/12,000/18,000 6,600/18,000/30,000

6" W.C. 6" W.C.

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23113052-01D

ILLUSTRATED PARTS BREAKDOWN

Battery

Positive

AAA

Battery

Negative

CABINET BODY MODELS VP16A, VN18A, VP26A, VN30A, VP16TA, VN18TA, VP26TA AND VN30TA

See Pages 28 through 31

Replacement may vary from grill shown

See Pages 28 through 31

Install Battery

According To

This Illustration

www.desatech.com

113052-01D

PARTS LIST

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 32 of this manual.

KEY PART NUMBER

NO. VP16A VP16TA VN18A VN18TA DESCRIPTION QTY.

1 107672-01 107672-01 107672-01 107672-01 Front Panel 1 2 103476-01 103476-01 103476-01 103476-01 Grill Guard 1 3 104635-01 104635-01 104635-01 104635-01 Apron 1 4 107894-01 107894-01 107894-01 107894-01 Reﬂector Assembly 1 5 ** ** ** ** Cabinet Back Panel 1 6 111435-01 111435-01 111435-01 111435-01 Electronic Ignitor 1 7 099066-02 099066-02 099066-02 099066-02 Mounting Bracket 1 8 098271-11 098271-11 098271-11 098271-11 Ignitor Cable 1 9 098462-01 ____ 098462-01 ____ Control Rod Assembly 1 10 098325-01 ____ 098325-01 ____ Roll Pin 1 11 098354-03 ____ 098354-03 ____ Control Knob 1 12 099415-18 099415-18 099415-19 099415-19 Gas Regulator 1 13 104819-02 104819-02 104819-02 104819-02 Regulator Bracket 1 14 ____ 098522-24 ____ 098522-24 Thermostat Gas Valve 1 15 ____ 102394-02 ____ 102394-02 Thermostat Valve Mounting Bracket 1 16 107660-01 103256-02 107660-01 103256-02 Inlet Tube 1 17 109303-04 109303-04 109303-04 109303-04 Bafﬂe 1

KEY PART NUMBER

NO. VP26A VP26TA VN30A VN30TA DESCRIPTION QTY.

1 107675-01 107675-01 107675-01 107675-01 Front Panel 1 2 103476-02 103476-02 103476-02 103476-02 Grill Guard 1 3 104635-03 104635-03 104635-03 104635-03 Apron 1 4 107894-02 107894-02 107894-02 107894-02 Reﬂector Assembly 1 5 ** ** ** ** Cabinet Back Panel 1 6 111435-01 111435-01 111435-01 111435-01 Electronic Ignitor 1 7 099066-02 099066-02 099066-02 099066-02 Mounting Bracket 1 8 098271-11 098271-11 098271-11 098271-11 Ignitor Cable 1 9 098462-01 ____ 098462-01 ____ Control Rod Assembly 1 10 098325-01 ____ 098325-01 ____ Roll Pin 1 11 098354-03 ____ 098354-03 ____ Control Knob 1 12 099415-18 099415-18 099415-19 099415-19 Gas Regulator 1 13 104819-02 104819-02 104819-02 104819-02 Regulator Bracket 1 14 ____ 098522-24 ____ 098522-24 Thermostat Gas Valve 1 15 ____ 102394-02 ____ 102394-02 Thermostat Valve Mounting Bracket 1 16 107660-03 103256-02 107660-03 103256-02 Inlet Tube 1 17 109303-03 109303-03 109303-03 109303-03 Bafﬂe 1

** Not a ﬁeld replaceable part.

PARTS AVAILABLE - NOT SHOWN - ALL MODELS

PART NO. DESCRIPTION QTY.

100642-03 Hardware Assembly 1 109483-01 Lighting Instruction Plate 1 105345-01 Cable Tie 1 107888-01 Control Position Label 1 GA4550 Base Foot 1

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25113052-01D

ILLUSTRATED PARTS BREAKDOWN

Battery

Positive

AAA

Battery

Negative

CABINET BODY MODELS VP16ITA AND VP22ITA

See Page 30

Replacement may vary from grill shown

See Page 30

Install Battery According To

This Illustration

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113052-01D

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions

PARTS LIST

listed under Replacement Parts on page 32 of this manual.

KEY PART NUMBER NO. VP16ITA VP22ITA DESCRIPTION QTY.

1 107672-01 107675-01 Front Panel 1 2 103476-01 103476-02 Grill Guard 1 3 104635-02 104635-03 Apron 1 4 107894-01 107894-03 Reﬂector Assembly 1 5 ** ** Cabinet Back Panel 1 6 111435-01 111435-01 Electronic Ignitor 1 7 099066-02 099066-02 Mounting Bracket 1 8 098271-11 098271-11 Ignitor Cable 1 9 098462-01 098462-01 Control Rod Assembly 1 10 098325-01 098325-01 Roll Pin 1 11 098354-04 098354-05 Control Knob 1 12 099415-18 099415-18 Gas Regulator 1 13 104819-02 104819-02 Regulator Bracket 1 14 098522-24 098522-24 Thermostat Gas Valve 1 15 103255-02 103255-02 SIT Outlet Tube 1 16 103256-02 103256-02 Inlet Tube 1 17 102394-02 102394-02 Thermostat Valve Mounting Bracket 1 18 109303-04 109303-05 Bafﬂe 1

PARTS AVAILABLE - NOT SHOWN

100642-03 100642-03 Hardware Assembly 1 109483-01 109483-01 Lighting Inst. Plate 1 107888-01 107888-01 Control Position Decal 1 105345-01 105345-01 Cable Tie 1 GA4550 GA4550 Base Kit 1

** Not a ﬁeld replaceable part.

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27113052-01D

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST

BURNER ASSEMBLY MODELS VP16A AND VN18A

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 32 of this manual.

ODS/Pilot

Burner Assembly VP16A, VN18A

KEY PART NUMBER

NO. VP16A VN18A DESCRIPTION QTY.

1 110803-02 110803-03 ODS/Pilot 1 2 110186-01 110186-01 Thermocouple Kit 1 3 098200-03 098200-03 Control Valve Bracket 1 4 105051-02 105051-02 Pilot Tubing 1 5 099218-08 099218-08 Burner 1 6 098508-01 098508-01 Valve Retainer Nut 1 7 099056-01 099056-02 Injector - Plaque A 1 8 099056-25 099056-24 Injector - Plaque B 1 9 103844-01 103844-01 Control Valve 1 10 107660-01 107660-01 Inlet Tubing 1 11 103352-03 103352-03 Tubing-Valve to Plaque A 1 12 103352-04 103352-04 Tubing-Valve to Plaque B 1

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113052-01D

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST

BURNER ASSEMBLY MODELS VP26A AND VN30A

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 32 of this manual.

ODS/Pilot

Burner Assembly VP26A, VN30A

KEY PART NUMBER

NO. VP26A VN30A DESCRIPTION QTY.

1 110803-02 110803-03 ODS/Pilot 1 2 110186-01 110186-01 Thermocouple Kit 1 3 098200-03 098200-03 Control Valve Bracket 1 4 105050-02 105050-02 Pilot Tubing 1 5 099218-09 099218-09 Burner 1 6 098508-01 098508-01 Valve Retainer Nut 1 7 099056-25 099056-24 Injector - Plaque A, C 2 8 099056-01 099056-02 Injector - Plaque B 1 9 100747-01 100747-01 Control Valve 1 10 107660-03 107660-03 Inlet Tubing 1 11 103353-04 103353-04 Tubing-Valve to Plaque A 1 12 103353-05 103353-05 Tubing-Valve to Plaque B 1 13 103353-06 103353-06 Tubing-Valve to Plaque C 1

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29113052-01D

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST

BURNER ASSEMBLY MODELS VP16ITA AND VP22ITA

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 32 of this manual.

Burner Assembly VP22ITA

ODS/Pilot

Burner Assembly VP16ITA

KEY PART NUMBER

NO. VP16ITA VP22ITA DESCRIPTION QTY.

1 110803-02 110803-02 ODS/Pilot 1 2 110186-01 110186-01 Thermocouple Kit 1 3 098200-04 098200-04 Control Valve Bracket 1 4 099387-11 099387-11 Pilot Tubing 1 5 099218-01 099218-03 Burner 1 6 098508-01 098508-01 Valve Retainer Nut 1 7 099056-01 099056-01 Injector 3-4 8 100615-01 100615-01 Male Connector 1 9 100605-01 100605-02 Control Valve 1 10 107899-01 107899-03 Inlet Tubing 1 11 107892-02 107900-02 Tubing-Valve to Plaque A 1 12 107892-01 107900-04 Tubing-Valve to Plaque B 1 13 107892-03 107900-01 Tubing-Valve to Plaque C 1 14 ____ 107900-03 Tubing-Valve to Plaque D 1

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113052-01D

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST

BURNER ASSEMBLY MODELS VP16TA, VN18TA, VP26TA AND VN30TA

This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 32 of this manual.

ODS/Pilot

Burner Assembly VP16TA, VN18TA

Burner Assembly VP26TA, VN30TA

KEY PART NUMBER

NO. VP16TA VN18TA VP26TA VN30TA DESCRIPTION QTY.

1 110803-02 110803-03 110803-02 110803-03 ODS/Pilot 1 2 110186-01 110186-01 110186-01 110186-01 Thermocouple Kit 1 3 105051-01 105051-01 099387-03 099387-03 Pilot Tubing 1 4 104818-03 104818-03 104818-04 104818-04 Outlet Tubing 1 5 099218-08 099218-08 099218-09 099218-09 Burner 1 6 099056-01 099056-02 099056-25 099056-24 Injector - Plaque A and C 1-2 7 099056-25 099056-24 099056-01 099056-02 Injector - Plaque B 1

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31113052-01D

REPLACEMENT PARTS

Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty.

PARTS UNDER WARRANTY

Contact authorized dealers of this product. If they canʼt supply original replacement part(s), call DESA Heating Productsʼ Technical Service Department at 1-866-672-6040.

When calling DESA Heating Products, have ready

• your name

• your address

• model and serial numbers of your heater

• how heater was malfunctioning

• type of gas used (propane/LP or natural gas)

• purchase date Usually, we will ask you to return the part to the

factory.

PARTS NOT UNDER WARRANTY

Contact authorized dealers of this product. If they canʼt supply original replacement part(s), either contact your nearest Parts Central (see page 33) or call DESA Heating Products at 1-866-672-6040 for referral information.

When calling DESA Heating Products, have ready

• model number of your heater

• the replacement part number

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, con

tact 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 Productsʼ Technical Service Department at 1-866-672-6040. When calling please have your model and serial numbers of your heater ready.

You can also visit DESA Heating Productsʼ techni cal service web site at www.desatech.com.

SERVICE PUBLICATIONS

You can purchase a service manual from the address listed on the back page of this manual. Send a check for $5.00 payable to DESA Heating Products.

www.desatech.com

113052-01D

ACCESSORIES

Purchase these heater accessories from your local dealer. If they can not supply these accessories, either contact your nearest Parts Central (see page 33) or call DESA Heating Products at 1-866-672-6040 for referral information. You can also write to the address listed on the back page of this manual.

EQUIPMENT SHUTOFF VALVE GA5010

For all models. Equipment shutoff valve with 1/8" NPT tap.

FAN KITS - GA3250T

For all models. Provides better heat distribution. Makes heater more efﬁcient. Complete installation and operating instructions included.

Thermostatically-controlled, blower turns itself on and off as required.

PARTS CENTRAL

These Parts Centrals are privately owned businesses. They have agreed to support our customerʼs needs by providing original replacement parts and acces sories.

Tool & Equipment Co.

5 Manila Ave Hamden, CT 06514-0322 1-800-397-7553 203-248-7553

Portable Heater Parts

342 N. County Rd. 400 East Valparaiso, IN 46383-9704 219-462-7441 1-888-619-7060 www.portableheaterparts.com sales@portableheaterparts.com techservice@portableheaterparts.com

FBD

1349 Adams Street Bowling Green, KY 42103-3414 270-846-1199 1-800-654-8534 Fax: 1-800-846-0090 franktalk@aol.com

Master Parts Dist.

1251 Mound Ave. NW Grand Rapids, MI 49504-2672 616-791-0505 1-800-446-1446 www.nbmc.com

Washer Equipment Co.

1715 Main Street Kansas City, MO 64108-2195 KS, MO, AR

816-842-3911

www.washerparts.com

East Coast Energy

707 Broadway W. Long Branch, NJ 07764-1542 732-870-8809 1-800-755-8809 www.njplaza.com/ecep

21st Century

2950 Fretz Valley Road Perkasie, PA 18944-4034 215-795-0400 800-325-4828

Laporte’s Parts & Service

2444 N. 5th Street Hartsville, SC 29550-7704 843-332-0191 Parts Department

Cans Unlimited

P.O. Box 645 Taylor, SC 29687-0013 803-879-3009 1-800-845-5301 cuisales@aol.com

www.desatech.com

33113052-01D

NOTES

______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________

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113052-01D

NOTES

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35113052-01D

WARRANTY INFORMATION

113052 01

KEEP THIS WARRANTY

Model

Serial No.

Date Purchased

Always specify model and serial numbers when communicating with the factory.

We reserve the right to amend these speciﬁcations at any time without notice. The only warranty applicable is our standard written warranty. We make no other warranty, expressed or implied.

LIMITED WARRANTY

VANGUARD VENT-FREE INFRARED GAS HEATERS

DESA Heating Products warrants this product to be free from defects in materials and components for four (4) years from the date of ﬁrst purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions. To make a claim under this warranty the Bill of Sale or cancelled check must be presented.

This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Heating Products Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product and/or DESA Heating Products who will provide original factory replacement parts. Failure to use original factory replacement parts voids this warranty. The heater MUST be installed by a qualiﬁed installer in accordance with all local codes and instructions furnished with the unit.

This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts that fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by improper installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner.

TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUD ING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO FOUR (4) YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA HEATING PRODUCTSʼ LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA HEATING PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.

Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential damages, so the above limitation on implied warranties or exclusion or limitation on damages may not apply to you.

This warranty gives you speciﬁc legal rights and you may also have other rights that vary from state to state.

For information about this warranty write:

Patent Pending

2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 www.desatech.com

NOT A UPC

113052-01 Rev. D 08/04

Desa VN30TA, VN18TA, VN18A, VP26TA, VP26A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INFORMATION

LOCAL CODES

UNPACKING

PRODUCT FEATURES

INSTALLATION

OPERATING HEATER

INSPECTING HEATER

TROUBLESHOOTING

SPECIFICATIONS

REPLACEMENT PARTS

SERVICE HINTS

TECHNICAL SERVICE

SERVICE PUBLICATIONS

ACCESSORIES

PARTS CENTRAL

WARRANTY INFORMATION