Empire Comfort Systems VFSUR30-2 User Manual

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EMPIRE

INSTALLATION Instructions

AND Owner's Manual

Comfort Systems

 

VISTA SLOPE GLAZE MULTI-SIDED

Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference.

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.

WARNING: If the information in these instructions are 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 IFYOU 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.

UNVENTED GAS LOG HEATER OR VENTED DECORATIVE HEATER

MODELS

VFSUR18-2

VFSUR24-2

VFSUR30-2

This is an unvented gas-firedheater. It uses air (oxygen) from the room in which it is installed. Provisions for adequate combustion and ventilation air must be provided. Refer to page 9.

WARNING: If not installed, operated and maintained in accordance with the manufacturer's instructions, this product could expose you to substances in fuel or from fuel combustion which can cause death or serious illness.

Water Vapor: A By-Productof Unvented

Room Heaters

Water vapor is a by-productof gas combustion. An unvented room heaterproduces approximately one (1) ounce (30ml) of water for every 1,000 BTU's (.3KW's) of gas input per hour. Refer to page 9.

Page 1

TABLE OF CONTENTS

 

Section

Page

Carton Contents................................................................................................................................................

3

Hardware Package............................................................................................................................................

3

Important Safety Information ..........................................................................................................................

4

Safety Information for Users of LP Gas...........................................................................................................

5

Introduction......................................................................................................................................................

6

General Information.........................................................................................................................................

7

Requirements for Canada.................................................................................................................................

8

Water Vapor: By Product of Unvented Room Heaters.....................................................................................

9

Provisions for Adequate Combustion and Ventilation Air...............................................................................

9

Clearances................................................................................................................................................

10-11

Combustible Material.....................................................................................................................................

12

Fireplace Preparation......................................................................................................................................

12

Installing as a Vented Appliance....................................................................................................................

13

Before Fully Installing the Appliance............................................................................................................

13

Gas Supply.....................................................................................................................................................

14

Placement of Glowing Embers and Lava Rock.............................................................................................

15

Operation Instructions/Flame Appearance.....................................................................................................

15

VFSUR-(18,24, 30) Lighting Instructions...................................................................................................

16

Burner Instructions.........................................................................................................................................

17

Pilot Flame Characteristics.............................................................................................................................

18

Cleaning and Servicing..................................................................................................................................

18

Wiring ............................................................................................................................................................

19

Troubleshooting..............................................................................................................................................

20

Master Parts Distributor List..........................................................................................................................

21

How To Order Repair Parts............................................................................................................................

21

Parts List.........................................................................................................................................................

22

Parts View.......................................................................................................................................................

23

Page 2

25741-0-0309

CARTON CONTENTS

VFSUR Burner Assembly

Lava Rock Packet

Soot Warning Sheet

Installation Package

Rockwool Package

Damper Clamp

Installation Instructions

Serial Number Tag

Warranty Card

Hardware Package (See Figure Below)

#10 X 1/2" Phillips Hex Head Screw (3)

1/4" X 1 1/4" Slotted Hex Head Anchor Screw (3)

HARDWARE PACKAGE

#10 X ½” PHILLIPS HEX HEAD SCREW (3)

1/4” X 1 1/4” SLOTTED HEX HEAD ANCHOR SCREW (3)

Hardware shown to scale where possible.

25741-0-0309

Page 3

IMPORTANT SAFETY INFORMATION

An unvented room heater having an input rating of more than 6,000 Btu per hour shall not be installed in a bathroom

An unvented room heater having an input rating of more than 10,000 Btu perhourshall not be installed in a bedroom orbathroom.

Never burn solid fuels in a fireplace where a gas log set is installed.

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.

Children and adults should be alerted to the hazards of high surface temperature and should stay away to avoid burns or clothing ignition.

Young children should be carefully supervised when they are in the same room as the appliance.

This unit complies withANSI Z21.11.2 Unvented Heaters and it also complies with ANSI Z21.60 Decorative Vented Appliances forSolid Fuel Burning Fireplaces. State orlocal codes may only allow operation of this appliance in a vented configuration. Check your state or local codes.

Correct installation of logs, proper location of the heater and annual cleaning are necessary to avoid potential problems with sooting. Sooting, resulting from improperinstallation oroperation, can settle on surfaces outside the fireplace.

Avoid any drafts that could alter burner flame patterns. Do not allow fans to blow directly into the fireplace. Do not place a blower inside burn box area of firebox. Ceiling fans may create drafts that alter burner flame patterns. Sooting and improper burning will occur as a result of drafts.

WARNING:Donotallowfanstoblowdirectlyintothefireplace. Avoid any drafts that alter burner flame patterns.

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

WARNING:Donotoperatethisapplianceunlessallcomponents including logs, burners, and controls are in good working condition. Never operate this appliance if any log or twig is broken, or out of their intended position. Refer to the Log set placement instructions for correct log and twig positioning.

Replacement components are available through your local dealer as indicated in the How to Order Repair Parts section of the appliance manual.

Periodic examination and cleaning of the venting system of the solid-fuelburning fireplace, including frequency of such examination and cleaning, by a qualified agency.

The installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1*/NFPA54 or International Fuel Gas Code.

*Available from the American National Standards Institute, Inc. 11 West 42nd St., New York, N.Y. 10018

NOTE: Installation and repair should be done by a qualified serviceperson.Theapplianceshouldbeinspectedbeforeuseand at least annually by a qualified service person. More frequent cleaning may be required due to excessive lint from carpeting, bedding material, etc. It is imperative that the control compartment, burners and circulating air passageways of the appliance be kept clean.

Any safety screen or guard removed for servicing an appliance must be replaced prior to operating the appliance. Provide adequate combustion and ventilation air.

The flow of combustion and ventilation air MUST NOT be obstructed.

Provide adequate clearances around air openings into the combustion chamber and adequate accessibility clearance for servicing and proper operation. NEVER obstruct the front opening of the appliance.

Anunventedroomheaterintendedforinstallationinasolid-fuelburning fireplace shall comply with the following instructions.

Afireplacescreenmustbeinplacewhentheapplianceisoperating and,unlessotherprovisionsforcombustionairareprovided,the screen shall have an opening(s) for introduction of combustion air.

Solid-fuelsshall not be burned in a masonry or UL127 factorybuilt fireplace in which an unvented room heater is installed.

Any glass doors shall be fully opened when the appliance is in operation.

Any outside air ducts and/or ash dumps in the fireplace shall be permanently closed at time of appliance installation.

WARNING: Failure to keep the primary air opening(s) of the burner(s) clean may result in sooting and property damage.

WARNING: Before installing in a solid-fuelburning fireplace, the chimney flue and firebox must be cleaned of soot, creosote, ashes and loose paint by a qualified chimney cleaner.

WARNING

CARBON MONOXIDE POISONING MAY LEAD TO DEATH.

Early signs of carbon monoxide poisoning resemble the flu, with

When used without adequate combustion and ventilation air, heater

may give off CARBON MONOXIDE, an odorless, poisonous gas.

headache, dizziness and/or nausea. If you have these signs, heater

 

 

may not be working properly. Get fresh air at once! Have heater

Do not install heater until all necessary provisions are made for

 

 

serviced.

combustion and ventilation air. Consult the written instructions

 

Somepeople–pregnantwomen,personswith heartorlungdisease,

provided with the heater for information concerning combustion

 

anemia, those underthe influence of alcohol, those at high altitudes

and ventilation air. In the absence of instructions, refer to the

 

– are more affected by carbon monoxide than others.

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

 

The pilot light safety system senses the depletion of oxygen at its

Fuel Gas Code or applicable local codes.

 

location. If this heater is installed in a structure having a high

This heater is equipped with a PILOT LIGHT SAFETY SYSTEM

vertical dimension, the possibility exists that the oxygen supply at

designed to turn off the heater if not enough fresh air is available.

the higher levels will be less than that at the heater. In this type of

 

 

application, a fan to circulate the structure air will minimize this

DO NOT TAMPER WITH PILOT LIGHT SAFETY SYSTEM!

 

 

effect. The use of this fan will also improve the comfort level in the

If heater shuts off, do not relight until you provide fresh air.

structure. When a fan is used to circulate air, it should be located

Ifheaterkeepsshuttingoff,haveitserviced.Keepburnerandcontrol

so that the air flow is not directed at the burner.

compartment clean.

 

Page 4

25741-0-0309

SAFETY INFORMATION FOR USERS OF LP-GAS

Propane (LP-Gas)is a flammable gas which can cause fires and explosions. In its natural state, propane is odorless and colorless. You may not know all the following safety precautions which can protect both you and your family from an accident. Read them carefully now, then review them point

by point with the members of yourhousehold. Someday when theremaynotbeaminutetolose,everyone'ssafetywilldepend on knowing exactly what to do. If, after reading the following information, you feel you still need more information, please contact your gas supplier.

LP-GASWARNING ODOR

If a gas leak happens, you should be able to smell the gas because of the odorant put in the LP-Gas.That's your signal to go into immediate action!

Do not operate electric switches, light matches, use your phone. Do not do anything that could ignite the gas.

Get everyone out of the building, vehicle, trailer, or area. Do that IMMEDIATELY.

Close all gas tank or cylinder supply valves.

LP-Gasis heavier than air and may settle in low areas such as basements. When you have reason to suspect a gas leak, keep out of basements and other low areas. Stay out until firefighters declare them to be safe.

Use your neighbor's phone and call a trained LP-Gasservice person and the fire department. Even though you may not continue to smell gas, do not turn on the gas again. Do notre-enterthe building, vehicle, trailer, or area.

Finally,lettheservicemanandfirefighterscheckforescaped gas. Have them air out the area before you return. Properly trainedLP-Gasservice people should repair the leak, then check and relight the gas appliance for you.

no odor detected - odor fade

Some people cannot smell well. Some people cannot smell the odor of the chemical put into the gas.You must find out if you can smell the odorant in propane. Smoking can decrease your ability to smell. Being around an odor for a time can affect your sensitivity or ability to detect that odor. Sometimes other odors in the area mask the gas odor. People may not smell the gas odor or their minds are on something else. Thinking about smelling a gas odor can make it easier to smell.

TheodorantinLP-gasiscolorless,anditcanfadeundersomecircumstances.For example, if there is an underground leak, the movement of the gas through soil can filter the odorant. Odorants

in LP-Gasalso are subject to oxidation. This fading can occur if there is rust inside the storage tank or in iron gas pipes.

The odorant in escaped gas can adsorb or absorb onto or into walls, masonry and other materials and fabrics in a room. That will take some of the odorant out of the gas, reducing its odor intensity.

LP-Gasmay stratify in a closed area, and the odor intensity could vary at different levels. Since it is heavier than air, there may be more odor at lower levels. Always be sensitive to the slightest gas odor. If you detect any odor, treat it as a serious leak. Immediately go into action as instructed earlier.

some points to remember

Learn to recognize the odor of LP-gas.Your local LP-Gas Dealer can give you a "Scratch and Sniff" pamphlet. Use it to find out what the propane odor smells like. If you suspect that your LP-Gas has a weak or abnormal odor, call your LP-Gas Dealer.

If you are not qualified, do not light pilot lights, perform service, or make adjustments to appliances on the LP-Gassystem.Ifyouarequalified,consciouslythinkabouttheodor ofLP-Gasprior to and while lighting pilot lights or performing service or making adjustments.

Sometimes a basement or a closed-uphouse has a musty smell that can cover up theLP-Gasodor. Do not try to light pilot lights, perform service, or make adjustments in an area where the conditions are such that you may not detect the odor if there has been a leak ofLP-Gas.

Odor fade, due to oxidation by rust or adsorption on walls of new cylinders and tanks, is possible.Therefore, people should be particularly alert and careful when new tanks or cylinders are placed in service. Odor fade can occur in new tanks, or reinstalled old tanks, if they are filled and allowed to set too

long before refilling. Cylinders and tanks which have been out of service for a time may develop internal rust which will cause odor fade. If such conditions are suspected to exist, a periodic sniff test of the gas is advisable. If you have any question about the gas odor, call your lp-gas dealer. A periodic sniff test of the lp-gas is a good safety measure under any condition.

If, at any time, you do not smell the LP-Gasodorant and you think you should, assume you have a leak. Then take the same immediate action recommended above for the occasion when you do detect the odorizedLP-Gas.

If you experience a complete "gas out," (the container is under no vapor pressure), turn the tank valve off immediately. If the container valve is left on, the container may draw in some air through openings such as pilot light orifices. If this occurs, some new internal rusting could occur. If the valve is left open, then treat the container as a new tank. Always be sure your container is under vapor pressure by turning it off at the container before it goes completely empty or having it refilled before it is completely empty.

25741-0-0309

Page 5

INTRODUCTION

IMPORTANT: Read all instructions carefully before starting installation.Failuretofollowtheseinstallationinstructionsmay result in a possible fire hazard and will void the warranty.

Save this manual for future reference.

Please read this manual before installing and using the appliance.

Instructions to Installer

1.Installer must leave instruction manual with owner after installation.

2.Installermusthaveownerfilloutandmailwarrantycardsupplied with unvented room heater/vented decorative appliance.

3.Installer should show owner how to start and operate unvented room heater/vented decorative appliance.

Always consult your local Building Department regarding regulations, codes or ordinances which apply to the installation of an unvented room heater/vented decorative appliance.

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.

New Installation

Solid-fuelsshall not be burned in a fireplace where a vented decorative appliance is installed.

A vented decorative appliance must be installed only in a solidfuel burning fireplace with a working flue and constructed of noncombustible material.

Any alteration of the original design, installed other than as shownintheseinstructionsorusewithatypeofgasnotshownon theratingplateistheresponsibilityofthepersonandcompany making the change.

Important

All correspondence should refer to complete Model Number, Serial Number and type of gas.

Attention: During initial use of log you will detect an odor as the log is cured.

Notice: During initial firing of this unit, its paint will bake out, and smoke will occur. To prevent triggering of smoke alarms, ventilate the room in which the unit is installed.

Warning:This appliance is forinstallation only in a solidfuelburningmasonryorUL127 factory-builtfireplaceorinalistedventlessfireboxenclosure.Ithasbeendesigncertifiedfor theseinstallations.Exception:DONOTinstallthisappliance in afactory-builtfireplace that includes instructions stating it has not been tested or should not be used with unvented gas logs.

WARNING:Any modification to this unvented gas heateror its controls can be dangerous. Improperinstallation oruse of the heatercan cause serious injury ordeath from fire, burns, explosion or carbon monoxide poisoning.

Well Head Gas Installations

Some natural gas utilities use "well head" gas. This may affect the Btu output of the unit. Contact the gas company for the heating value. Contact the manufacturer or your gas company before changing spud/orifice size.

ACCESSORIES

 

Description

Color

EK-2

Embers Kit

 

ELH-1

Fireplace Hood for Vent-FreeLogs

Black

ELH-2

Fireplace Hood for Vent-FreeLogs

Brass

FRBC

Battery Operated Remote Control - Manual

 

FRBTC

Battery Operated Remote Control with Thermostat

FREC

Electric Remote Control - Manual

 

FWS

Wall Switch

 

TMV

Wall Thermostat, Millivolt - Reed Switch

 

 

 

PRODUCT SPECIFICATIONS

 

 

 

 

 

 

 

 

Natural Gas

Propane Gas

 

 

 

 

 

 

 

 

 

 

 

 

Valve Type

 

Millivolt

Millivolt

 

 

 

 

Regulator pressure setting

 

3.5" W.C.

10.0" W.C.

 

 

 

 

Gas inlet pressure

Max.

10.5" W.C.

13.0" W.C.

 

 

 

 

 

 

Min.

5.0" W.C.

11.0" W.C.

 

 

 

 

 

 

 

 

 

 

 

 

Model

 

Gas

 

Valve Type

 

BTUH

BTUH

 

 

 

 

 

 

 

Max. Rate

Min. Rate

VFSUR18

 

Natural

 

Millivolt

 

 

36,000

 

25,000

VFSUR18

 

Propane

 

Millivolt

 

 

36,000

 

25,000

VFSUR24

 

Natural

 

Millivolt

 

 

38,000

 

26,500

VFSUR24

 

Propane

 

Millivolt

 

 

38,000

 

26,500

VFSUR30

 

Natural

 

Millivolt

 

 

40,000

 

28,000

VFSUR30

 

Propane

 

Millivolt

 

 

40,000

 

28,000

Page 6

25741-0-0309

GENERAL INFORMATION

This is an unvented gas-firedheater. It uses air (oxygen) from the room in which it is installed. Provisions for adequate combustion and ventilation air must be provided.

Keep room area clear and free from combustible materials, gasoline and other flammable vapors and liquids.

Unvented gas heaters are a supplemental zone heater. They are not intended to be a primary heating appliance. Water vapor produced by an unvented heater can create moisture problems in a home when operated for extended periods of time.

During manufacturing, fabricating and shipping, various components of this appliance are treated with certain oils, films or bonding agents. These chemicals are not harmful but may produce annoying smoke and smells as they are burned off during the initial operation of the appliance; possibly causing headaches or eye or lung irritation. This is a normal and temporary occurrence.

The initial break-inoperation should last2-3hours with the burner at the highest setting. Provide maximum ventilation by opening windows or doors to allow odors to dissipate. Any odors remaining after this initialbreak-inperiod will be slight and will disappear with continued use.

This appliance must not be used with glass doors in the closed position. This can lead to pilot outages and severe sooting outside the fireplace.

Do not use this room heater if any part has been under water.

Immediately call a qualified service technician to inspect the room heater and replace any part of the control system and any gas control which has been under water.

Warning: This appliance is equipped for (natural or propane) gas. Field conversion is not permitted.

Before you get started

Carefully inspect the contents for shipping damage. If any parts are missing or damaged, immediately inform the dealer from whom you purchased the appliance. Do not attempt to install any part of the appliance unless you have all parts in good condition.

Make sure you have received all parts:

Check your packing list to verify that all listed parts have been received. You should have the following:

Gas log grate/burner assembly.

Three (3) masonry anchoring screws and three (3) 10 x 1/2" black sheet metal anchoring screws.

Plastic bag containing glowing embers (rockwool) for burner coverage.

Plastic bag containing lava rock.

Millivolt controlled heater designed to be operated with optional devices for ON/OFF functions.

Wall switch or thermostat with wire.

Hand held remote control with ON/OFF switch or thermostat.

Handle the gas log burner assembly by the grate and legs only. Do not pick the unit up by the burner.

Gloves are recommended when handling logs to prevent skin irritation. Logs are fragile - Handle with care.

Qualified Installing Agency

Installation and replacement of gas piping, gas utilization equipment or accessories and repair and servicing of equipment shall be performed only by a qualified agency.The term "qualified agency" means any individual, firm, corporation, or company that either in person or through a representative is engaged in and is responsible for (a) the installation, testing, or replacement of gas piping or (b) the connection, installation, testing, repair, or servicing of equipment; that is experienced in such work; that is familiar with all precautions required, and that has complied with all the requirements of the authority having jurisdiction.

State of Massachusetts: The installation must be made by a licensed plumber or gas fitter in the Commonwealth of Massachusetts.

Sellers of unvented propane or natural gas-firedsupplemental room heaters shall provide to each purchaser a copy of 527CMR-30upon sale of the unit.

In the State of Massachusetts, unvented propane and natural gas-firedspace heaters shall be prohibited in bedrooms and bathrooms.

The installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1* or International Fuel Gas Code.

*Available from the American National Standards Institute, Inc. 11 West 42nd St., New York, N.Y. 10018.

High Altitudes: For altitudes/elevation above 2,000 feet ratings should be reduced at the rate of 4 percent for each 1,000 feet above sea level. Contact the manufacturer.

25741-0-0309

Page 7

REQUIREMENTS FOR CANADA

This unit cannot be installed in a UNVENTED application, this unitcan only be installed as a VENTED application with these requirements.

IMPORTANT SAFETY INFORMATION

This unit complies with ANSI Z21.60and CGA 2.26 Decorative Gas Appliances For Installation In Solid Fuel Burning Fireplaces.

Do not burn wood or solid fuels in a fireplace where a decorative gas log set is installed. This appliance is for installation only in a solid fuel burning fireplace, masonry fireplace or manufactured fireplace.

Warning: Any modification to this gas log set or to controls can be dangerous. Improper installation or use of the gas log set can cause serious injury or death from fire, burns, explosion or carbon monoxide poisoning.

1.Please follow all local codes regarding installation, combustion and ventilation air or in the absence of local codes follow the National Fuel Gas Code ANSI Z223.1(U.S. installation), or CAN/CGA-B149,Installation Code (Canada installation).

2.Proper installation, burner pan location and log placement is important to achieve optimum look and performance of your gas log set. The logs have been designed for easy location and placement on the grate and must be followed for proper operation.

3.Do not operate this log set with glass doors in the closed position. A fireplace screen must be in place when the log set is burning. Adequate combustion air must be provided for proper venting.All flames should go up and out the top of the firebox into the flue vent. If any flames float or curl forward into the room do not operate appliance. Check for an open flue and adequate combustion air into the room. A damper clamp must be installed on the firebox damper to maintain an open flue vent condition. Refer to page 13 INSTALLING

DAMPER CLAMP

4.Young children must be carefully supervised when they are in the same room as the gas log while in operation. Do not place stockings, clothing or any flammable material above or near the fireplace.

5.Do not substitute or use materials other than those supplied for use with the log set.

6.Also refer to IMPORTANT SAFETY INFORMATION on page 4 of this manual

WARNING; DO NOT OPERATE THIS GAS LOG SET

WITH GLASS DOORS CLOSED

Clothing or other flammable material should not be placed on or near the appliance.

Do not place trash or other articles on the log set during operation.

During manufacturing, fabricating and shipping, various components of this appliance are treated with certain oils, films or bonding agents. These bonding agents are not harmful but may produce annoying smoke and smells as they are burned off during initial operation of the appliance. This is a normal temporary occurrence. A window should be opened during the initial bake out period.

Keep burner and control compartment clean.

WARNING: Before installing in a solid fuel burning fireplace, the chimney flue and firebox must be cleaned of soot, creosote, ashes and loose paint by a qualified chimney cleaner.

Installation and repair should be done by a qualified service person. The appliance should be inspected before use and at least annually by a qualified service person. More frequent cleaning may be required due to excessive lint from carpeting, bedding materials, etc. It is imperative that control compartments, burners and circulating air passageways of the appliance be kept clean.

Do not put anything around the fireplace that will obstruct the flow of ventilation air.

Do keep the appliance area clear and free from combustible material, gasoline and other flammable vapors and liquids.

A yearly examination and cleaning of the venting system of the solid-fuelburning fireplace must be performed by a qualified agency.

Do make a periodic visual check of pilot and burners. Clean and replace damaged parts.

Do not use this appliance if any part has been under water.

Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

Never burn solid fuels in fireplace where a gas log set is installed.

This unit complies with ANSI Z21.60 Decorative Vented

Appliances for Solid Fuel Burning Fireplaces. State or local codes may only allow operation of this appliance in a vented configuration. Check your state or local codes.

Page 8

25741-0-0309

WATER VAPOR: A BY-PRODUCTOF UNVENTED ROOM HEATERS

Water vapor is a by-productof gas combustion. An unvented room heater produces approximately one (1) ounce (30ml) of water for every 1,000 BTU's (.3KW's) of gas input per hour.

Unvented room heaters must be used as supplemental heat (a room) rather than a primary heat source (an entire house). In most supplemental heat applications, the water vapor does not create a problem. In most applications, the water vapor enhances the low humidity atmosphere experienced during cold weather.

The following steps will help insure that water vapor does not become a problem.

1.Be sure the heater is sized properly for the application, including ample combustion air and circulation air.

2.If high humidity is experienced, a dehumidifier may be used to help lower the water vapor content of the air.

3.Do not use an unvented room heater as the primary heat source (an entire house).

PROVISIONS FOR ADEQUATE COMBUSTION & VENTILATION AIR

This heater shall not be installed in a confined space unless provisions are provided for adequate combustion and ventilation air.

The National Fuel Gas Code defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8m3 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.

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 or less with openings gasketed or sealed, and

b.Weather-strippinghas 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-ceilingjoints, 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.

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, Section 5.3., International Fuel Gas Code, or applicable local codes.

Example of Large Room with 1/2 Wall divider.

DIVIDER

FIREPLACE

H

L2

WL1

Figure 1

The following formula can be used to determine the maximum heater rating per the definition of unconfined space:

Btu/Hr = (L1 + L2)FT x (W)FT x (H)FT x 1000

50

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, Section 5.3.

Adhere to all codes, or in their absence, the latest edition of THE NATIONAL FUEL GAS CODE ANSI Z223.1 or NFPA54 which can be obtained from:

American National Standards InstituteNational Fire Protection

Association, Inc.

 

11 West 42nd St.

Batterymarch Park

New York, NY 10018

Quincy, MA 02269

25741-0-0309

Page 9

CLEARANCES

Minimum Dimensions For Solid Fuel Burning Fireplaces UL127 Factory Built Fireplaces (Figure 2)

Model

A

B

C

VFSUR18

22

17

17

VFSUR24

28

17

18

VFSUR30

32

17

18

The dimensions shown and defined in the fireplace manufacturer’s instructions are minimum clearances to maintain in installing this heater. Left and right clearances are determined when facing the front of the heater.

Glass Doors

Make sure that glass doors are open during all operations of the logset. The opening of the glass door frame should be the dimension used for the minimum front opening of the firebox.

Follow these instructions to ensure safe installation.

Failure to follow instructions exactly can create a fire hazard.

C

A

B

Figure 2

Sidewall & Ceiling Clearances (Figure 3)

41”

6”

Figure 3

Clearances to combustibles must be as stated in the manufacturer's Installation Instructions and/or Owner's Manual of the firebox this unit will be used in. If no clearances to combustibles are listed, the clearances must be as follows: The sides of the fireplace opening must be 6" from any combustible wall. The ceiling must be at least

41" from the fireplace opening. See Figure 3.

Mantel Clearances Without Hood (Figure 4)

You must have non-combustiblematerials above the fireplace opening.Non-combustiblematerial must extend at least 12" above fireplace opening. With sheet metal, you must have noncombustible material behind it.

Heat resistant materials such as slate and marble must be at least

1/2"thick.Sheetmetalshouldnotbeinstalledontocombustible material.

10” and less Mantel

10” and less Mantel

 

 

 

28”

28”

12” 12”

HEATER IN FIREPLACE HEAT RESISTANT OR FIREBOX MATERIAL 12”

WITHOUT HOOD

Figure 4

If your installation does not meet the above clearances, you must proceed to one of the following steps:

Use a hood.

Operate the heater with flue damper open. See page 12 for

Installing as a Vented Appliance.

Raise the mantel to the proper height.

Remove the mantel.

Non-Combustible

Requirements for Safe Installation

Material Distance

 

12" or more

Non-combustiblematerial.

Less than 12"

Non-combustiblematerial must be ex-

 

tended to at least 8" with the installation

 

of the optional fireplace hood. If you

 

cannot extend non-combustiblematerial

 

at least 8", you must operate heater with

 

flue damper open.

Page 10

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