Desa VP16, VN18T, VN18IT, VN30, VN30T User Manual

...

For more information, visit www.desatech.com

VN18, VN18T VP16, VP16T VP26, VP26T

VN30, VN30T VP16IT, VN18IT VP22IT, VN25IT

UNVENTED (VENT-FREE) INFRARED GAS HEATER

SAFETY INFORMATION AND

INSTALLATION MANUAL

Model VN30 Shown

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.

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

Combustion and Ventilation

Air for

sec-

tion on page 4 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

Save this manual for future reference.

TABLE OF CONTENTS SAFETY INFORMATION

TABLE OF CONTENTS

SAFETY INFORMATION ............................................................ 2

LOCAL CODES........................................................................... 3

PRODUCT IDENTIFICATION ..................................................... 3

UNPACKING............................................................................... 3

PRODUCT FEATURES .............................................................. 3

AIR FOR COMBUSTION AND VENTILATION ........................... 4

INSTALLATION ........................................................................... 7

OPERATING HEATER.............................................................. 13

INSPECTING HEATER............................................................. 17

CLEANING AND MAINTENANCE ............................................ 17

SAFETY INFORMATION

WARNINGS

IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this heater. Improper use of this heater can cause serious injury or death from burns, fire, explosion, electrical shock, and carbon monoxide poisoning.

DANGER: Carbon monoxide poisoning may lead

to death!

Carbon Monoxide Poisoning: Early signs of carbon monoxide

poisoning resemble the flu, with 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.

Natural and Propane/LP Gas: Natural and propane/LP gases are

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

Make certain you read and understand all warnings. Keep this manual for reference. It is your guide to safe and proper operation of this heater.

WARNING: Any change to this heater or its

controls can be dangerous.

WARNING: Do not use any accessory not ap-

proved for use with this heater.

SPECIFICATIONS .................................................................... 18

TROUBLESHOOTING .............................................................. 19

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 22

REPLACEMENT PARTS .......................................................... 30

SERVICE HINTS....................................................................... 30

TECHNICAL SERVICE ............................................................. 30

SERVICE PUBLICATIONS ....................................................... 30

ACCESSORIES ........................................................................ 30

OWNER’S REGISTRATION FORM.......................................... 31

WARRANTY INFORMATION ...................................... Back Cover

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 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.

For more information, visit www.desatech.com

107887-01E

SAFETY INFORMATION

LOCAL CODES

PRODUCT IDENTIFICATION

UNPACKING

PRODUCT FEATURES

SAFETY INFORMATION

Continued

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, pages 4 through 6.

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

8. Do not run heater

• where flammable liquids or vapors are used or stored

• under dusty conditions

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

10. Turn off heater, unplug blower and let heater cool before servicing. Only a qualified service person should service and repair heater.

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

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

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

14. Provide adequate clearances around air openings.

LOCAL CODES

Install and use heater with care. Follow all local codes. In the absence of local codes, use the latest edition of National Fuel Gas Code, ANSI Z223.1/NFPA 54*.

*Available from:

American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

PRODUCT IDENTIFICATION

Ignitor Button

Front Panel

Figure 1 - Vent-Free Gas Heater

Control Knob

Grill Guard

Plaque

Heater Cabinet

UNPACKING

1. Remove heater from carton.

2. Remove all protective packaging applied to heater for shipment.

3. Check heater for any shipping damage. If heater is damaged, promptly inform dealer where you bought heater.

PRODUCT FEATURES

SAFETY DEVICE

This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for ventfree 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 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.

107887-01E

For more information, visit www.desatech.com

AIR FOR COMBUSTION AND VENTILATION

Providing Adequate Ventilation

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.

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 fuel burning appliances draw air from the house to operate. You must provide adequate fresh air for these appliances. This will insure proper venting of vented fuel-burning appliances.

PROVIDING ADEQUATE VENTILATION

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

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

1. Unusually Tight Construction

2. Unconfined Space

3. Confined Space The information on pages 4 through 6 will help you classify your

space and provide adequate ventilation.

Unusually tight construction is defined as construction where:

a. walls and ceilings e xposed to the outside atmosphere

have a continuous water vapor retarder with a rating of one perm (6x10 openings gasketed or sealed

b. weather stripping has been added on openable win-

dows and doors

c. caulking or sealants are applied to areas such as

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

If your home meets all of the three criteria above, you must provide additional fresh air. See

From Outdoors

If your home does not meet all of the three criteria above, proceed to

tion

, page 5.

, page 6.

Determining Fresh-Air Flow For Heater Loca-

-11

kg per pa-sec-m2) or less with

and

Ventilation Air

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.

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.

For more information, visit www.desatech.com

107887-01E

AIR FOR COMBUSTION AND VENTILATION

Continued

AIR FOR COMBUSTION AND VENTILATION

Determining Fresh-Air Flow For Heater Location

DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION

Determining if You Have a Confined or Unconfined Space

Use this work sheet to determine if you have a confined or unconfined space. Space: Includes the room in which you will install heater plus any adjoining

rooms with doorless passageways or ventilation grills between the rooms.

1. Determine the volume of the space (length x width x height). Length x Width x Height =___________ cu. ft. (volume of space)

Example:

height) = 2560 cu. ft. (volume of space) If additional ventilation to adjoining room is supplied with grills or open-

ings, 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

Example:

Btu/Hr the space can support)

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

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

Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling

can support)

2560 cu. ft. (volume of space) x 20 = 51,200 (maximum

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

Example:

Gas water heater _____________ Btu/Hr Vent-free heater + _____________ Btu/Hr Total = _____________ Btu/Hr

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:

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 ex-

tra space provides an unconfined space, remove door to adjoining room or add ventilation grills between rooms. See V entilation Air Fr om Inside Building, page 6.

B. Vent room directly to the outdoors. See Ventilation Air From Out-

doors, page 6.

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

confined.

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.

51,200 Btu/Hr (maximum the space can support) 60,000 Btu/Hr (actual amount of Btu/Hr used)

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

107887-01E

For more information, visit www.desatech.com

AIR FOR COMBUSTION AND VENTILATION

Ventilation Air

AIR FOR COMBUSTION AND VENTILATION

Continued

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2). You can also remove door into adjoining room (see option 3, Figure 2). Follow the National Fuel

Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

Ventilation Air From Outdoors

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:

attic if attic has a thermostat-controlled power vent. Heated air entering the attic will activate the power vent.

Do not provide openings for inlet or outlet air into

Ventilation Grills

Ventilation

Grills

into Adjoining

Room,

Option 1

Figure 2 - Ventilation Air from Inside Building

Remove Door into Adjoining

Room,

Option 3

Into Adjoining Room,

Option 2

12"

Outlet Air

Inlet Air

Figure 3 - Ventilation Air from Outdoors

For more information, visit www.desatech.com

Ventilated Attic

Crawl Space

To Attic

Crawl

Space

Ventilated

107887-01E

INSTALLATION

Check Gas Type

Installation Items

Locating Heater

NOTICE: This heater is intended for use as supplemental heat. Use this heater along with your primary heating system. Do not install this heater as your primary heat source. If you have a central heating system, you may run system’s circulating blower while using heater. This will help circulate the heat throughout the house. In the event of a power outage, you can use this heater as your primary heat source.

WARNING: A qualified service person must in-

stall 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.

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 design-certified equipment shutoff valve can be purchased from your dealer. See Accessories, page 30.

WARNING: Never install the heater

• in a bedroom or bathroom

• in a recreational vehicle

• where curtains, furniture, clothing, or other flam-

mable 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 surfaces next to heater. Installing heater next to vinyl or cloth wall coverings or operating heater where impurities (such as, but not limited to, tobacco smoke, aromatic candles, cleaning fluids, oil or kerosene lamps, etc.) in the air exist, may discolor walls or cause odors.

IMPORTANT:

Vent-free heaters add moisture to the air. Although this is beneficial, installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See Air for Combustion and Ventilation, pages 4 through 6. 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 An optional fan kit is available from your dealer. See Accessories,

page 30. If planning to use fan, locate heater near an electrical outlet.

CEILING

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.

For more information, visit www.desatech.com

107887-01E

36"

10"

Minimum From Sides Of Heater

Left Side

FLOOR

Figure 4 - Mounting Clearances As Viewed From Front of Heater

Minimum

Right Side

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

INSTALLATION

Thermostat Sensing Bulb Installing Heater To Wall

INSTALLATION

Continued

THERMOSTAT SENSING BULB

(Thermostat Models Only)

The thermostat sensing bulb has been placed inside the heater for protection during shipping.

Locating Thermostat Sensing Bulb (for Thermostat Applications)

1. Remove front panel of heater (see Figure 7).

2. Locate thermostat sensing bulb just under burner assembly.

IMPORTANT:

proper operation.

Attach thermostat sensing bulb to back of heater for

Attaching Thermostat Sensing Bulb

1. Remove thermostat sensing bulb from holders inside heater. Route through slot opening in bottom of heater.

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

3. 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.

Removing Front Panel Of Heater

1. Remove the four painted screws, two on each side of front panel.

2. Pull bottom of front panel forward, then out.

3. Remove any remaining packaging materials.

Figure 7 - Removing Front Panel Of Heater

Methods For Attaching Mounting Bracket To Wall

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 minimum clearances shown in Figure 8, page 9. If you can, provide greater clearances from floor and joining wall.

Figure 6 - Mounting Bracket

For more information, visit www.desatech.com

107887-01E

INSTALLATION

Continued

INSTALLATION

Installing Heater To Wall (Cont.)

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.

16"

Min.

Only Insert Mounting Screws Through Last

Adjoining Wall

12"

Min.

Adjoining Wall

Figure 8 - Mounting Bracket Clearances

Hole On Each End

4 and 5 Plaque Heaters

Only Insert Mounting Screws Through Last

Hole On Each End

3 Plaque Heater

Floor

14"

Floor

14"

25 3/4"

Optional

19 3/4"

Min.

25 3/4"

Optional

19 3/4"

Min.

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 Anchor Method

For attaching mounting bracket to hollow walls (wall areas between studs) or solid walls (concrete or masonry)

1. Drill holes at marked locations using 5/16" drill bit. For solid walls (concrete or masonry), drill at least 1" deep.

2. Fold wall anchor as shown in Figure 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

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 mounting bracket.

Horizontal Slots

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.

For more information, visit www.desatech.com

107887-01E

Stand-Out Tab

Figure 11 - Mounting Heater Onto Mounting Bracket

Mounting Bracket (attached to wall)

INSTALLATION

Installing Heater To Wall (Cont.) Mounting Heater To Floor

INSTALLATION

Continued

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 T o W all Anc hor 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 11 and 12).

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 , page 8).

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 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, 13/8 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.

Front View

Heater

Spacer

Side View

Figure 12 - Installing Bottom Mounting Screws

For more information, visit www.desatech.com

Wood Screw

Wall

Base Foot

Sheet Metal Screw

Figure 13 - Installing Base Feet

107887-01E

INSTALLATION

Continued

INSTALLATION

Connecting To Gas Supply

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 (non-utility) gas wells. This gas is commonly known as wellhead gas.

IMPORTANT

connecting heater to gas line. Gas line pressure must be no greater than 14 inches 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 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 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.

: For natural gas, check gas line pressure before

Typical Inlet Pipe Diameters

VN18(T), VP16(T), VN18IT, and VP16IT - 3/8" or greater

VN30(T), VP26(T), VN25IT, and VP22IT - 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.

We recommend that you install a sediment trap in supply line as shown in Figure 15. Locate sediment trap where it is within reach for cleaning. Install in piping system between fuel supply and heater. 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

Propane/LP Supply Tank

Figure 14 - External Regulator With Vent Pointing Down

External Regulator

Vent Pointing Down

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.

For more information, visit www.desatech.com

107887-01E

Heater Cabinet

3/8" NPT Pipe Nipple

Test Gauge Connection*

Sediment Trap

Figure 15 - Gas Connection

Tee Joint Reducer

Bushing to 1/8" NPT

1/8" NPT Plug Tap

Tee Joint Pipe Nipple Cap

3" Minimum

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)

* 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 30.

+ 23 hidden pages