Desa FMH26TN, FMH26TN 14 User Manual

COMPACT HEAT MAJIC™

VENT-FREE NATURAL GAS FIREPLACE SYSTEM

OWNER’S OPERATION AND INSTALLATION MANUAL

FMH26TN

14,000 to 26,000 Btu/Hr

with Thermostat

Shown with Optional

Cabinet Mantel/Hearth

Base Accessory

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 per-

formed by a qualified installer, service agency, or the gas supplier.

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

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

tion and Ventilation

page 5 of this manual.

Air for Combus-

section on

Save this manual for future reference.

NATURAL GAS VENT-FREE FIREPLACE SYSTEM

SAFETY INFORMATION

WARNINGS

WARNING ICON G 001

IMPORTANT: Read this owner’s manual carefully and completely before trying to assemble, operate, or service this fireplace. Improper use of this fireplace 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 fireplace may not be working properly. Get fresh air at once! Have fireplace 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 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 fireplace.

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

WARNING: Do not allow fans to blow directly into the fireplace. Avoid any drafts that alter burner flame patterns. Ceiling fans can create drafts that alter burner flame patterns. Altered burner patterns can cause sooting.

WARNING: Do not use a blower insert, heat exchanger insert, or other accessory not approved for use with this fireplace.

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 in the fireplace.

Fireplace front and screen becomes very hot when running fireplace. Keep children and adults away from hot surfaces to avoid burns or clothing ignition. Fireplace will remain hot for a time after shutdown. Allow surfaces to cool before touching.

Carefully supervise young children when they are in the room with fireplace.

You must operate this fireplace with a fireplace screen in place. Make sure fireplace screen is in place before running fireplace.

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. 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 fireplace shall not be installed in a bedroom or bathroom.

4. Do not use this fireplace as a woodburning fireplace. Use only the logs provided with the fireplace.

5. Do not add extra logs or ornaments such as pine cones, vermiculite, or rock wool. Using these added items can cause sooting. Do not add lava rock around base. Rock and debris could fall into the control area of fireplace.

6. Y ou must operate this fireplace with the fireplace screen in place. Make sure fireplace screen is in place before running fireplace.

7. This fireplace is designed to be smokeless. If logs ever appear to smoke, turn off fireplace and call a qualified service person. eration, slight smoking could occur due to log curing and fireplace burning manufacturing residues.

8. T o prevent the creation of soot, follow the instructions in Cleaning and Main- tenance, page 19.

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

10. This fireplace needs fresh air ventilation to run properly . This fireplace has an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS shuts down the fireplace if not enough fresh air is available. See Air for Combus- tion and Ventilation, pages 5 through

7. If fireplace keeps shutting off, see Troubleshooting, pages 20 through 22.

11. Do not run fireplace

• where flammable liquids or vapors

are used or stored.

• under dusty conditions.

12. Do not use this fireplace to cook food or burn paper or other objects.

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

Note:

During initial op-

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OWNER’S MANUAL

IMPORTANT:

THIS PACKAGE CONTAINS A FIREPLACE HOOD. UNWRAP

CARTON AND REMOVE HOOD

BEFORE DISCARDING

PROTECTIVE PACKAGING.

SAFETY INFORMATION

PRODUCT FEATURES

Continued

SAFETY PILOT

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

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

16. Do not operate fireplace if any log is broken. Do not operate fireplace if a log is chipped (dime-sized or larger).

17. Provide adequate clearances around air openings.

This fireplace has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The ODS/pilot is a required feature for vent-free room fireplaces. The ODS/pilot shuts off the fireplace if there is not enough fresh air.

PIEZO IGNITION SYSTEM

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

THERMOSTATIC HEAT CONTROL

This fireplace has a thermostat sensing bulb and a control valve. The thermostat will automatically modulate the heat output to maintain a consistent room temperature. This results in greater fireplace comfort. This can also result in lower gas bill.

PRODUCT IDENTIFICATION

Fireplace Cabinet

Screen

LOCAL CODES

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

*Available from: American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

UNPACKING

1. Remove log box and fireplace from carton. The hood is not attached.

IMPORTANT:

inside the cardboard protective end wrap on the left side of fireplace (as viewed from front). A decal is on the outside of the cardboard end wrap stating hood is enclosed (see Figure 2).

2. Remove hood from cardboard protective end wrap as shown in Figure 2.

3. Remove all protective packaging applied to fireplace for shipment.

4. Make sure your fireplace includes one hardware packet.

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

Hood Enclosed Decal

The fireplace hood is

Figure 1 - Vent-Free Natural Gas Fireplace System

Ignitor Button

Control Knob

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Cardboard Protective Fireplace End Wrap

Logs

Hood

Figure 2 - Removing Fireplace Hood

NATURAL GAS VENT-FREE FIREPLACE SYSTEM

ASSEMBLY

WARNING: Always have branch support and screen in place before operating fireplace. This prevents excessive temperatures on fireplace surfaces.

WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this fireplace may result in property damage or personal injury

ASSEMBLING FIREPLACE

Tools Required:

• Phillips screwdriver

• 5/16" hex wrench

• slotted screwdriver

Installing Log

1. Lift screen up and pull out to remove.

2. Cut two plastic straps to remove the log from the firebox cavity.

3. An optional blower is available. See Ac- cessories, page 26. Install optional blower now. Follow installation instructions provided with blower.

4. Remove log packaging material and discard packaging. Gently place log set on burner support (see Figure 3). The log should fit flat against top of burner support and log locators fit into the slots under the log. Do not allow log to contact flame. If flame contacts log, soot will be created.

5. Reattach screen by placing the notches in the screen frame over the shoulder screws and pushing down.

Log

Screen

Figure 3 - Assembling Fireplace

Screen Shipping Screw

Assembling Hood

1. Locate four black phillips sheet metal screws from the hardware packet.

2. Rotate hood as shown in Figure 4. Make sure hood tabs point toward fireplace.

3. Insert hood tabs between baffle and louvers (see Figure 4).

Hood Tabs

Shoulder Screw

Burner Support

Branch Support

4. Gently rotate hood to upright position. Make sure hood tabs are behind louvers and hood is resting on firebox top (see Figure 4).

5. Align screw holes on hood with screw holes on firebox top.

6. Insert screws as shown in Figure 4. Tighten screws firmly.

Louver

Hood

Hood Tab

Baffle

Figure 4 - Assembling Hood

Sheet Metal Screw

Firebox Top

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OWNER’S MANUAL

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 fuelburning appliances.

PROVIDING ADEQUATE VENTILATION

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

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

1. Unusually Tight Construction

2. Unconfined Space

3. Confined Space The information on pages 5 through 7 will

help you classify your space and provide adequate ventilation.

Unusually Tight Construction

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

Unusually tight construction is defined as construction where:

a. walls and ceilings exposed to the

outside atmosphere have a continuous water vapor retarder with a rating of one perm (6 x 10 per pa-sec-m2) or less with openings 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

From Outdoors

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

termining Fresh-Air Flow For Fireplace Location

and

Ventilation Air

, page 7.

, page 6.

and

-11

De-

Confined and Unconfined Space

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

whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.

* Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them.

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Continued

NATURAL GAS VENT-FREE FIREPLACE SYSTEM

AIR FOR COMBUSTION AND VENTILATION

Continued

DETERMINING FRESH-AIR FLOW FOR FIREPLACE 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 fireplace 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. Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support.

_____________________(volume of space) x 20 = (Maximum Btu/Hr the space can support)

Example:

3. Add the Btu/Hr of all fuel burning appliances in the space. Vent-free fireplace __________________Btu/Hr Gas water heater* __________________Btu/Hr Gas furnace __________________Btu/Hr Vented gas heater __________________Btu/Hr Gas fireplace logs __________________Btu/Hr Other gas appliances* + __________________Btu/Hr Total = __________________Btu/Hr * Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.

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 adjoin-

ing 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 7. C. Install a lower Btu/Hr fireplace, 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) x 20 = 51,200 (maximum Btu/Hr the space can support)

Example:

Gas water heater Vent-free fireplace + Total =

51,200 Btu/Hr (maximum the space can support) 56,000 Btu/Hr (actual amount of Btu/Hr used)

30,000 26,000 56,000

Btu/Hr Btu/Hr Btu/Hr

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.

107105

AIR FOR

Remove

Door into

Adjoining

Room,

Option 3

Ventilation Grills

Into Adjoining Room,

Option 2

12"

Ventilation

Grills

into Adjoining

Room,

Option 1

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 5). You can also remove door into adjoining room (see option 3, Figure 5). 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.

OWNER’S MANUAL

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:

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

Do not provide openings for

Figure 5 - Ventilation Air from Inside Building Shown with Optional Mantel

Outlet Air

Ventilated Attic

Outlet Air

To Attic

Crawl

Space Inlet Air

Inlet Air

Ventilated

Crawl Space

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Figure 6 - Ventilation Air from Outdoors Shown with Optional Mantel

NATURAL GAS VENT-FREE FIREPLACE SYSTEM

INSTALLATION

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

WARNING: A qualified service person must install fireplace. Follow all local codes.

WARNING: Never install the fireplace

• in a bedroom or a 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 fireplace

• as a fireplace insert

• in high traffic areas

• in windy or drafty areas

CAUTION: This fireplace creates warm air currents. These currents move heat to wall surfaces next to fireplace. Installing fireplace next to vinyl or cloth wall coverings or operating fireplace 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:

ture to the air. Although this is beneficial, installing fireplace in rooms without enough ventilation air may cause mildew to form from too much moisture. See Air for Combustion

and Ventilation, pages 5 through 7.

Vent-free fireplaces add mois-

Note:

Your vent-free fireplace is designed to be used in zero clearance installations. Wall or framing material can be placed directly against any exterior surface on the rear, sides, or top of your fireplace, except where stand-off spacers are integrally attached. If standoff spacers are attached to your fireplace, these spacers can be placed directly against wall or framing materials.

Use the dimensions shown for rough openings to create the easiest installation (see Built-In Fireplace Installation, page 9).

CHECK GAS TYPE

Use only natural gas. If your gas supply is not natural gas, do not install fireplace. Call dealer where you bought fireplace for proper type fireplace.

INSTALLATION ITEMS

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

• piping (check local codes)

• sealant (resistant to propane/LP gas)

• equipment shutoff valve *

• test gauge connection *

• ground joint union

• sediment trap

• tee joint

• pipe wrench * 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 26.

Note:

If desired, purchase a four-sided brass trim kit for built-in installations. See Acces- sories, page 26.

LOCATING FIREPLACE

WARNING: Maintain the mini-

mum clearances shown in Figures 7 and 8. If you can, provide greater clearances from floor, ceiling, and joining wall.

You can recess firebox into the wall. You can also position fireplace in the optional cabinet or corner mantels. Only use optional cabinet or corner mantels specified in this manual. Purchase the optional mantel from your dealer (see Acces- sories, page 26).

IMPORTANT:

CEILING

36" Minimum

6" Minimum From Sides Of Fireplace

Left Side

FLOOR

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

Figure 7 - Mounting Clearances As Viewed From Front of Fireplace Shown Built In The Wall

CEILING

Top Of Mantel Can Be Flush With Wall

Left Side

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

Figure 8 - Mounting Clearances As Viewed From Front of Fireplace Shown with Optional Mantel

Note:

When installing fireplace directly on

36" Minimum

Right Side

carpeting, tile or other combustible material, other than wood flooring, the fireplace shall be installed on a metal or wood panel extending the full width and depth of the fireplace

CAUTION: If you install the

fireplace in a home garage

• fireplace pilot and burner must be at least 18 inches above floor.

• locate fireplace where moving vehicle will not hit it.

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OWNER’S MANUAL

INSTALLATION

Continued

For convenience and efficiency, install fireplace

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

• in coldest part of room.

An optional blower kit is available from your dealer. See Accessories, page 26. If planning to use blower, locate fireplace near an electrical outlet.

BUILT-IN FIREPLACE INSTALLATION

Built-in installation of this fireplace involves installing fireplace into a framed-in enclosure. This makes the front of fireplace flush with wall. An optional brass trim kit accessory is available (see Accessories, page 26). Brass trim will extend past sides of fireplace approximately 1/2 inch. This will cover the rough edges of the wall opening. If installing a built-in mantel above the fireplace you must follow the clearances shown in Figure 12, page 10. Follow the instructions below to install the fireplace in this manner.

Actual Framing Height 26" 26 7/8" Front Width 26 3/4" 26 7/8" Depth 9 1/2" 10 1/2" Bottom 3/4" 3/4"

1. Frame in rough opening. Use dimensions shown in Figure 9 for the rough opening.

If installing in a corner, use dimensions shown in Figure 10 for the rough opening. The height is 26 7/8" which is the same as the wall opening above.

2. If installing GA3450(T) blower accessory, do so at this time. Follow instructions included with blower accessory.

Note:

If not installing blower accessory, you may wish to run electrical wiring to your fireplace for future blower installation (see Accessories, page 26) Use only approved three-wire electrical wiring.

WARNING: If pre-wiring, do not connect wiring to any electrical source at this time.

Install fireplace electrical outlet and connect wiring to outlet before connecting to electrical source. The fireplace electrical outlet is included with the GA3450(T) blower accessory.

Only use the fireplace electrical outlet supplied with the GA3450(T) blower accessory.

Note:

A qualified installer should make

all electrical connections.

3. Install gas piping to fireplace location. This installation includes an approved flexible gas line (if allowed by local codes) after the equipment shutoff valve. The flexible gas line must be the last item installed on the gas piping.

4. If you have not assembled firebox, follow instructions on page 4.

5. Carefully set fireplace in front of rough opening with back of fireplace inside wall opening.

6. Attach flexible gas line to fireplace gas regulator. See Connecting F ir eplace to Gas Supply, page 15.

7. Bend four nailing flanges on outer casing with pliers (see Figure 11).

8. Attach fireplace to wall studs using nails or wood screws through holes in nailing flange.

3/4" Off

Figure 9 - Rough Opening for Installing in Wall

Figure 10 - Rough Opening for Installing in Corner

The Floor Minimum

9. Check all gas connections for leaks. See Checking Gas Connections, page 16.

10. If using optional brass trim kit, install the trim after final finishing and/or painting of wall. See instructions included with brass trim accessory for attaching brass trim.

IMPORTANT:

When finishing your firebox, combustible materials such as wall board, gypsum board, sheet rock, drywall, plywood, etc. may be butted up next to the sides and top of the firebox. Combustible materials should never overlap the firebox front facing.

WARNING: Do not allow any combustible materials to overlap the firebox front facing.

IMPORTANT:

Noncombustible materials such as brick, tile, etc. may overlap the front facing, but should never cover any necessary openings like louvered slots.

WARNING: Do not allow noncombustible materials to cover any necessary openings like louvered slots.

WARNING: Never modify or cover the louvered slots on the front of the firebox.

WARNING: Use only noncombustible mortar or adhesives when overlapping the front facing with noncombustible facing material.

Nails or Wood Screws

Nailing Flanges

Figure 11 - Attaching Fireplace to Wall Studs

Continued

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