United States Stove Company VFZC32L User Manual

United States

Stove Company

Vent-Free Zero-Clearance Gas Fireplace

Models VFZC32N, VFZC32L

Shown with optional

cabinet mantel, hearth

base, and brass trim.

OWNER'S OPERATION AND INSTALLATION MANUAL

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).

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 "Adequate Combustion And Ventilation Air" on pages 6-10 of this manual.

WARNING:

Do not use a blower insert,

heat exchanger insert or other

accessories not approved

for use with this heater.

Save this manual for

future reference.

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.

851301 3/98

TABLE OF CONTENTS

SECTION PAGE

LOCAL CODES.......................................................................................................2

WARNINGS/SAFETY INFORMATION.................................................................2-4

VFZC32 SPECIFICATIONS.................................................................................4-5

PRODUCT FEATURES...........................................................................................6

LOCATING THE FIREPLACE.....................................................................................6

AIR FOR COMBUSTION AND VENTILATION..................................................6-10

INSTALLATION................................................................................................10-13

GAS CONNECTION........................................................................................14-15

GAS PRESSURE CHECK.....................................................................................15

MANTEL INSTALLATION................................................................................16-18

BUILT-IN INSTALLATION.................................................................................18-19

LOG ASSEMBLY...................................................................................................20

OPERATING INSTRUCTIONS........................................................................21-23

CLEANING/SERVICING..................................................................................23-24

FLAME APPEARANCE.........................................................................................24

PARTS DIAGRAM & LIST.....................................................................................25

GENERATOR ASSEMBLY PARTS DIAGRAM......................................................26

GENERATOR ASSEMBLY PARTS LIST................................................................27

VF32B BLOWER KIT WIRING DIAGRAM............................................................28

OPTIONAL ACCESSORIES.............................................................................29-30

HOW TO ORDER REPAIR PARTS........................................................................31

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 Electric Code, ANSI/ NFPA 70 (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

WARNINGS/SAFETY INFORMATION

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 poisoning.

WARNINGS/SAFETY INFORMATION CONTINUED

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

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

2. Never install the fireplace * in a recreational vehicle * where curtains, furniture, clothing, or other flammable objects are less than

36 inches from the front, top, or side of the fireplace * in high traffic areas * in windy or drafty areas

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

4. You must operate this fireplace with the fireplace screen and hood in place. Make sure these parts are in place before running.

5. 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.

6. To prevent malfunction and/or sooting, an unvented gas heater should be cleaned at least annually by a professional service person. More frequent cleaning may be required due to excessive lint from carpeting, etc. It is imperative that control compartments, burners and circulating air passageways be kept clean.

7. Correct placement of the ceramic fiber logs is necessary to avoid problems with sooting. Sooting can settle on surfaces outside the heater and cause discoloration. See the appropriate section of this manual for instructions.

8. This Vent-free gas log heater requires fresh air ventilation to run properly. See Air for Combustion and Ventilation instructions in this owner's manual.

9. Do not run fireplace * where flammable liquids or vapors are used or stored * under dusty conditions

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

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

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

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

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

15. Operating vent-free gas log heaters in a fireplace above elevations of 4,500 feet could cause pilot outage.

16. IMPORTANT: The fireplace hood must not be replaced with a hood/canopy which may be provided with the decorative type unvented room heater.

WARNINGS/SAFETY INFORMATION CONTINUED

17. CARBON MONOXIDE POISONING: Early signs of carbon monoxide poisoning are similar to the flu with headaches, dizziness and/or nausea. If you have these signs, obtain fresh air immediately. Have the heater serviced as it may not be operating properly.

18. This vent-free gas fireplace is intended to be smokeless. If logs appear to smoke, turn off the heater and call a qualified service person. Initial burn off may cause slight smoke and odor during the first four hours of operation.

19. Input ratings are shown in BTU per hour and are for elevations up to 2,000 feet. For elevations above 2,000 feet, input ratings should be reduced 4 percent for each 1,000 feet above see level. Refer to the National Fuel Gas Code.

20. The fireplace and its individual shut off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).

21. The fireplace must be isolated from the gas supply piping system be closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5 kPa).

22. Do not use this gas fireplace 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.

VFZC32 SPECIFICATIONS

Natural Gas

Manifold Pressure Setting: 4" w.c. Gas Inlet Pressure: Maximum 10-1/2" w.c.

Minimum 5" w.c.

Model Number Type Max BTU/Hr Min BTU/Hr of Burners

VFZC32N Manual 30,000 8,000 2

VFZC32L Manual 30,000 8,000 2

Controls - Main control has 4 positions:

1. OFF - All gas to the gas logs is shut off at the control

2. IGN - Piezo ignitor allows ignition of the pilot without the use of matches or batteries

3. PILOT - Valve position to light/maintain a standing pilot

4. ON - Gas flow to complete system, front burner ignition

Front Burner Control Knob - infinite control, rotate clockwise to minimum rate and counterclockwise

to maximum rate.

Rear Burner Control Knob - Has 3 positions:

1. OFF - Gas to rear burner is shutoff at control

2. ON/MAX - Maximum gas flow to rear burner

3. MIN - Minimum gas flow rate to rear burner

Propane/LPG

Manifold Pressure Setting: 10" w.c. Gas Inlet Pressure: Maximum 13" w.c.

Minimum 11" w.c.

Gas Rate Number

VFZC32 SPECIFICATIONS, CONTINUED...

FIREBOX TOP VIEW

FIREBOX FRONT VIEW FIREBOX SIDE VIEW

PRODUCT FEATURES

Operation

This Vent-free Gas Fireplace requires no outside venting or chimney making installation easy and inexpensive. When used without the optional blower (model VF32B), the firebox requires no electricity making it ideal for emergency backup heat.

Blower Accessory

The VFZC32 Vent-free Gas Fireplace will accept the VF32B Blower Kit accessory. The kit comes with the variable blower. 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 the blower is optional.

LOCATING FIREPLACE

Planning

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

1. Where the fireplace will be located. Allow for wall and ceiling clearances (see

Installation Clearances, pages 10 & 11).

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 fireplace 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 fuel-burning appliances.

AIR FOR COMBUSTION AND VENTILATION CONTINUED

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 6 through 10 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 (6x10 per pa-sec-m ) 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.

-11 2

If your home meets all of the three criteria above, you must provide additional fresh air. See Ventilation Air From Outdoors, page 10.

If your home does not meet all of the three criteria above, proceed to page 8.

Confined Space and Unconfined Space

The National Fuel Gas Code (ANSI Z223.1, 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 (4.8m 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 (4.8m 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.

AIR FOR COMBUSTION AND VENTILATION CONTINUED

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 the 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: Space size 22 ft. (length) x 18 ft. (width) x 8 ft. (ceiling height) =

3168 cu. Ft. (volume of space) If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.

2. 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: 3168 cu. Ft. (volume of space) 50 cu. Ft. = 63.3 or 63,300 (maximum

BTU/Hr the space can support)

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

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

Example: Gas water Heater 40,000 BTU/Hr

Vent-free firebox with log heater + 39,000 BTU/Hr

Total = 79,000 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: 63,300 BTU/Hr (maximum the space can support) 79,000 BTU/Hr (actual amount of BTU/Hr used)

The space in the above example is a confined space because the actual BTU/Hr used is more than the 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 9.

AIR FOR COMBUSTION AND VENTILATION CONTINUED

B. Vent room directly to the outdoors. See Ventilation Air from Outdoors, page 10. 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.

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 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 into adjoining room ( see options in Figure 1). 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 worksheet, adding the space of the adjoining unconfined space. The combined spaces must have enough fresh air to supply all appliances in both spaces.

Figure 1 - Ventilation Air from Inside Building

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. (See Figure 2) IMPORTANT: Do not provide openings for inlet or outlet air into attic if attic has a thermostatcontrolled power vent. Heated air entering the attic will activate the power vent.

Figure 2 - Ventilation Air from Outdoors

INSTALLATION

INSTALLATION CLEARANCES

WARNING

Maintain the minimum clearances. If you can, provide greater clearances from floor, ceiling, and adjoining wall.

Carefully follow the instructions below. This will ensure safe installation.

Minimum Wall and Ceiling Clearances (see Figure 3)

A. Clearances from the side of the firebox opening to any combustible wall should not

be less than 6 inches. (This applies to built-in installation or using an (optional) cabinet mantel kit.)

B. Clearances from the top of the firebox opening to the ceiling should not be less than

42 inches.

Mantel Clearances for Conventional Installation

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