Desa FB36NCA User Manual

UNVENTED (VENT-FREE)

LogMate™ UNIVERSAL FIREBOX

OWNER’S OPERATION AND INSTALLATION MANUAL

FB36NCA and FB42NC Non-circulating 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 firebox 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 (i.e. Installation of this product is permitted after the manufactured (mobile) home is sited).

Save this manual for future reference.

FB36CA and FB42C Circulating Models

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: For use only with decorative type unvented room heaters. Do not build a wood fire.

This firebox has been tested and approved by I.A.S. under their REQ. 2-97 for use with any ANSI Z21.11.2 approved gas logs.

VANGUARD UNVENTED (VENT-FREE) LOGMATE™ FIREBOX

SAFETY INFORMATION

WARNINGS

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

CAUTION: Carefully review the instructions supplied with the decorative type unvented room heater for the minimum fireplace size requirement. Do not install the appliance in this firebox unless this firebox meets the minimum dimensions required for the installation.

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

1. This firebox shall not be installed in a bedroom or bathroom.

2. Never install the firebox

• 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 firebox

• in high traffic areas

• in windy or drafty areas

3. Do not use this firebox as a wood-burning fireplace. Use only decorative unvented room heaters (log sets).

4. Do not add extra logs or ornaments such as pine cones, vermiculite, or rock wool. Using these added items can cause sooting.

5. Y ou must operate this fireplace with the provided fireplace screen, hood, and brick liner in place. Make sure these parts are in place and screens are closed before running firebox.

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

7. Do not use a blower insert, heat exchanger insert or other accessory not approved for use with this heater. Do not use blower accessory with Models FB36NCA or FB42NC. Use only the provided hood, or appropriate polished brass hood accessory. See Accessories on page 13.

8. Vent-free gas log heaters installed in these fireboxes require fresh air ventilation to run properly. See Air for Com- bustion and Ventilation, pages 4 through 6.

9. Do not run firebox

• where flammable liquids or vapors

are used or stored

• under dusty conditions

10. Do not use this firebox to cook food or burn paper or other objects.

11. Never place any objects in the firebox or on logs.

12. Firebox front and screen becomes very hot when running firebox. Keep children and adults away from hot surfaces to avoid burns or clothing ignition. Firebox will remain hot for a time after shut-down. Allow surfaces to cool before touching.

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

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

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

16. Do not use the firebox if it has been under water due to the shock hazard that could result with the blower accessary (if installed) in place.

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, also known as NFPA 54*. Firebox must be electrically grounded in accordance with the National Electrical Code, ANSI/NFPA70 (latest edition).

*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. Use utility knife to cut carton all the way around above the staples on the bottom tray. Lift carton off the firebox and discard.

2. Remove all protective packaging from inside firebox. Carefully lift the firebox off the bottom corrugated tray.

3. Check carton contents for the following:

• Screen assembly

• Screen support rod

• Hardware and parts bag containing

the following:

- Owners Operation and Installation Manual

- 2 - Black #10 x 3/8" Phillips screws for mounting screen support rods

If any items are missing, inform dealer where you bought firebox.

4. Check all items for any shipping damage. If damaged, promptly inform dealer where you bought firebox.

Notice: The firebox identification label (including model number, serial number, clearances, etc.) is located either on the left front edge of the firebox or behind the left side firebrick panel. See Figure 15, page 10.

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OWNER’S MANUAL

PRODUCT SPECIFICATIONS

Standoffs (Models FB36NCA and FB42NC only)

Built-in Nailing Flanges

Louvers (Models FB36CA and FB42C only)

Figure 1 - Firebox Front View

Standoffs (Models FB36NCA and FB42NC only)

2 3/4"

1 1/2"

41 11/16" (36" models) • 47 11/16" (42" models)

19 3/8"

36" (36" models) • 42" (42" models)

29 1/8" (36" Models) • 35 1/8" (42" Models)

2 5/8"

35"

15 7/8"

2 5/8"

6 5/8"

8 7/16"

Electrical Access Hole (for use when using blower power cord with external electrical outlet. See Blower Kit Instructions)

Diameter Holes

Figure 2 - Firebox Side View

19 1/2"

22 1/4"

Gas Line Access Hole (either side)

6 7/8"

Figure 3 - Firebox Top View

1 1/2"

9 5/8"

3 1/2"

10 3/4"

13 9/16"

Electrical Access Hole Strain relief fitting for electrical cable when hard wiring firebox for built-in installations (strain relief fitting included on circulating models only)

5/8"

30 3/8" (36" Models) • 36 7/8" (42" Models)

36" (36" Models) • 42" (42" Models) 41" (36" Models) • 47" (42" Models)

42 3/8" (36" Models) • 48 3/8" (42" Models)

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VANGUARD UNVENTED (VENT-FREE) LOGMATE™ FIREBOX

PRODUCT FEATURES

Operation

This firebox is designed for use with approved ANSI Z21.11.2 decorative type unvented room heaters. (Physical size limitations apply. Refer to minimum firebox requirements supplied with log heater.) It requires no outside venting or chimney making installation easy and inexpensive. When used without the blower (models FB36CA or FB42C only), the firebox requires no electricity making it ideal for emergency back-up heat.

Blower Accessory

The FB36CA or FB42C fireboxes will accept the GA3700 accessory. The variable blower allows you to select the fan speed you desire. The blower circulates heated air from the firebox into the room. Use of blower is optional.

Brick Liner

This firebox features a revolutionary lightweight concrete brick liner. As with all concrete liners, this liner may develop slight cracks when exposed to heat. These cracks will not affect the performance of the fireplace or vent-free gas logs.

LOCATING FIREBOX

Planning

Plan where you will install the firebox. This will save time and money later when you install the firebox. Before installation, consider the following:

1. Where the firebox will be located. Allow for wall and ceiling clearances (see Installation Clearances, page 7).

2. Everything needed to complete installation.

3. These models CANNOT be installed in a bedroom or bathroom.

4. Proper air for combustion and ventilation (see below).

AIR FOR COMBUSTION AND VENTILATION

WARNING: This firebox 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, fireboxes, 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 is exerpts 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 Contruction;

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

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 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 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 page 5.

, page 6.

Ventilation Air

-11

Confined and Unconfined Space

The National Fuel Gas Code (ANSIZ223.1, 1992 Section 5.3) 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.

Continued

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OWNER’S MANUAL

AIR FOR COMBUSTION AND VENTILATION

Continued

DETERMINING AIR FLOW FOR FIREBOX 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 firebox 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:

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.

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 work sheet, 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 6.

B. Vent room directly to the outdoors. See Ventilation Air from Outdoors, page 6. C. Install a lower Btu/Hr firebox, 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 22 ft. (length) x 18 ft. (width) x 8 ft. (ceiling height) = 3168 cu. ft. (volume of space)

3168 cu. ft. (volume of space) ÷ 50 cu. ft. = 63.3 or 63,300 (maximum Btu/Hr the space can support)

Vent-free firebox ____________ Btu/Hr Gas water heater* ____________ Btu/Hr Gas furnace ____________ Btu/Hr Vented gas heater ____________ Btu/Hr Gas firebox logs ____________ Btu/Hr Other gas appliances* +____________ Btu/Hr Total =____________ Btu/Hr

63,300 Btu/Hr (maximum the space can support) 79,000 Btu/Hr (actual amount of Btu/Hr used)

Example:

Gas water heater 40,000 Btu/Hr Vent-free firebox

with log heater + 39,000 Btu/Hr Total = 79,000 Btu/Hr

WARNING: If the area in which the firebox and gas log heater may be operated is smaller than that defined as

an unconfined space, provide adequate combustion and ventillation air by one of the methods described in the

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

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or applicable local codes.

Continued

VANGUARD

UNVENTED (VENT-FREE) LOGMATE™ FIREBOX

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 4). You can also remove door into adjoining room (see option 3, Figure 4). 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.

WARNING: Rework work-

sheet, adding the space of the adjoining unconfined space. The combined spaces must have enough fresh air to supply all appliances in both spaces.

12"

Ventilation

Grills

Into Adjoining

Room,

Option 1

Figure 4 - Ventilation Air from Inside Building

Remove Door into Adjoining

Room, Option

12"

Ventilation Grills

Into Adjoining Room,

Option 2

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.

IMPORTANT:

for 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

Outlet Air

Ventilated Attic

Outlet Air

Inlet Air

Figure 5 - Ventilation Air from Outdoors

To Attic

Crawl

Space

Ventilated

Crawl Space

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