Desa VN2800BTB, CFN2800BTB User Manual

BLUE FLAME

VENT -FREE NATURAL GAS HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

18,000 and 28,000 Btu/Hr Thermostatically-Controlled Models

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 qualified installer, service

agency, or the gas supplier.

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

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

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.

Save this manual for future reference.

CONTENTS

SECTION PAGE

Safety Information.........................................................................2

Product Identification .................................................................... 4

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

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

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

Air for Combustion and Ventilation..............................................5

Installing To Wall..........................................................................9

Connecting To Gas Supply............................................................14

Checking Gas Connections............................................................15

Operating Heater ...........................................................................17

Inspecting Burner ..........................................................................20

Cleaning And Maintenance ........................................................... 22

Troubleshooting.............................................................................22

Technical Service .......................................................................... 26

Specifications ................................................................................26

Service Hints .................................................................................26

Service Publications ......................................................................27

Replacement Parts ......................................................................... 27

Illustrated Parts List.......................................................................28-29

Accessories ....................................................................................30

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

SAFETY

INFORMATION

W ARNINGS

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, persons with heart or lung disease or anemia, those under the influence of alcohol, and those at high altitudes.

Natural Gas: Natural gas is odorless. An odor-making agent is added to natural gas. The odor helps you detect a natural gas leak. However, the odor added to natural gas can fade. Natural 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.

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SAFETY

W ARNINGS

Continued

INFORMATION

WARNING: Any change to this heater or its controls can be dangerous.

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. 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

3. This heater shall not be installed in a bedroom or bathroom.

4. Never install the heater

• 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

5. This heater needs fresh, outside air ventilation to run properly. This heater has an oxygen depletion sensor (ODS) pilot light safety system. The ODS shuts down the heater if not enough fresh air is available. See Air for Combustion and Ventilation, pages 5 through 8.

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

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

8. Do not run heater

• where flammable liquids or vapors are used or stored

• under dusty conditions

9. Never place any objects on the heater.

10.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.

11.Carefully supervise young children when they are in same room with heater.

12.Make sure grill guard is in place before running heater.

13.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.

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

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

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PRODUCT

IDENTIFICATION

LOCAL CODES

Ignitor Button Control Knob

Grill Guard

Glass Panel

Front Panel

Figure 1 - Vent-Free Natural Gas Heater

(Models VN2800BTB/CFN2800BTB Shown)

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, also known as NFPA 54*.

Heater Cabinet

UNPACKING

PRODUCT

FEATURES

*Available from:

American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

1. Remove heater from carton.

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

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

Safety Device

This heater has a pilot with an Oxygen Depletion Sensor Shutoff System (ODS). The ODS/pilot is a required feature for vent-free room heaters. The ODS/pilot shuts off the heater if there is not enough fresh air.

Piezo Ignition System

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

Thermostatic Heat Control

This heater has a thermostat sensing bulb and a control valve. This results in the greatest heater comfort. This can also result in lower gas bills.

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AIR FOR

W ARNING

COMBUSTION

AND

VENTILATION

This heater shall not be installed in a confined space 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 is excerpts from National Fuel Gas Code. NFPA 54/ANSI Z223.1, Section 5.3, Air for Combustion and Ventilation.

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

1. Unusually Tight Construction; 2. Unconfined Space; 3. Confined Space. The information on pages 5 through 8 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.

Unusually tight construction is defined as construction where: a. walls and ceilings exposed to the outside atmosphere have a continu-

ous water vapor retarder with a rating of one perm or less with open-

ings gasketed or sealed b. weather stripping has been added on openable windows 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

If your home does not meet all of the three criteria above, proceed to page 6.

Ventilation Air From Outdoors

and

, page 8

and

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Unconfined Space

The National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines uncon- fined space as having a minimum air volume of 50 cubic feet (127 cubic cm) for each 1000 Btu/Hr input rating of all appliances in the space (cubic feet equals length x width x height of space). Include adjoining rooms only if there are doorless passageways or ventilation grills between the rooms.

Confined Space

The National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines confined space as having an air volume of less than 50 cubic feet (127 cubic cm) for each 1000 Btu/Hr input rating of all appliances in the space (cubic feet equals length x width x height of space). Include adjoining rooms only if there are doorless passageways or ventilation grills between the rooms.

Continued

AIR FOR

COMBUSTION

AND

VENTILATION

Continued

DETERMINING AIR FLOW FOR HEATER LOCATION

Determining if You Have a Confined or Unconfined Space

Use this worksheet 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:

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. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.

____________ (volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr the space can support)

Example:

Btu/Hr the space can support)

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

Example:

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

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 extra space provides

an unconfined space, remove door to adjoining room or add ventilation grills between

rooms. See Ventilation Air From Inside Building, page 7. B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 8. 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.

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

2560 cu. ft. (volume of space)

2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 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

Gas water heater 40,000 Btu/Hr Vent-free heater + 18,000 Btu/Hr Total = 58,000 Btu/Hr

51,200 Btu/Hr (maximum the space can support) 58,000 Btu/Hr (actual amount of Btu/Hr used)

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AIR FOR

COMBUSTION

AND

VENTILATION

Continued

W ARNING

If the area in which the heater may be operated is smaller than that defined as an unconfined space, provide adequate combustion and ventilation air by one of the methods described in the

National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3.

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

W ARNING

Rework worksheet, adding the space of the adjoining unconfined space. appliances in both spaces.

The combined spaces must have enough fresh air to supply all

Ventilation

Grills

into Adjoining

Room,

Option 1

12"

Ventilation Grills

Into Adjoining Room,

Option 2

Remove Door into Adjoining

Room,

Option 3

12"

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Figure 2 - Ventilation Air from Inside Building

Continued

AIR FOR

COMBUSTION

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

IMPORTANT:

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 attic if attic has

Outlet Air

Inlet Air

Outlet Air

Inlet Air

Figure 3 - Ventilation Air from Outdoors

Ventilated Attic

Ventilated

Crawl Space

To Attic

Crawl

Space

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INSTALLING TO

NOTICE

WALL

A qualified service person must install heater. Follow all local codes.

CHECK GAS TYPE

Use only natural gas. If your gas supply is not natural, 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:

• piping (check local codes)

• sealant (resistant to propane/LP gas)

• manual shutoff valve * * An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable

alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See Accessories, page 30.

• ground joint union

• test gauge connection * (see Figure 13, page 15)

• sediment trap

• tee joint

• pipe wrench

LOCATING HEATER

This heater is designed to be mounted on a wall.

W ARNING

Maintain the minimum clearances shown in Figure 4 (page 10). If you can, provide greater clearances from floor, ceiling, and joining wall.

You can locate heater on floor, away from a wall. An optional floor mounting stand is needed. Purchase the floor mounting stand from your dealer. See Accesso- ries, page 30.

W ARNING

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

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 in the air (such as tobacco smoke) exist, may discolor walls.

IMPORTANT:

stalling heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See Air for Combustion and Ventilation, pages 5 through 8.

Vent-free heaters add moisture to the air. Although this is beneficial, in-

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

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Continued

INSTALLING TO

WALL

For convenience and efficiency, install heater

• where there is easy access for operation, inspection, and service

• in coldest part of room

Continued

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

36"

6" 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

THERMOSTAT SENSING BULB

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

Locating Thermostat Sensing Bulb

1. Remove front panel of heater (see Figure 7, page 11).

2. Locate thermostat sensing bulb just under burner assembly.

IMPORTANT:

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.

Attach thermostat sensing bulb to back of heater for proper operation.

Thermostat Sensing Bulb

Clamp

Figure 5 - Attaching Thermostat Sensing Bulb

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