Empire Comfort Systems VFD26FM(2 Quick start guide

INSTALLATION INSTRUCTIONS

AND

OWNER'S MANUAL

UNVENTED

GAS FIREPLACE

MODELS

VFD26FM(2,3)0(N,W,C)(N,P)-2

VFD26FP(2,3)0L(N,P)-2

VFD26FP70L(N,P)-1

VFD26FP30L10(N,P)-3

VFD26FP70L10(N,P)-1

Vent-Free Gas Fireplaces

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 in-

dicated on the rating plate. This appliance is not con-

vertible for use with other gases.

WARNING

If the information in these instructions are not fol-

-

ing property damage, personal injury or loss of life.

 

vapors and liquids in the vicinity of this or any

other appliance.

— WHAT TO DO IF YOU SMELL GAS

  

  

any phone in your building.

        

neighbor’s phone. Follow the gas supplier’s

instructions.

  



— Installation and service must be performed by a

-

plier.

EMPIRE

Comfort Systems

Installer: Leave this manual with the appliance.

Consumer: Retain this manual for future reference.

-

gen) from the room in which it is installed. Provisions

for adequate combustion and ventilation air must be

provided. Refer to pages 9 and 10.

WATER VAPOR: A BY-PRODUCT OF UNVENTED

ROOM HEATERS

Water vapor is a by-product of gas combustion. An

unvented room heater produces approximately one

ounce (30ml) of water for every 1,000 BTU's (.3KW's)

of gas input per hour. Refer to page 8.

WARNING

If not installed, operated and maintained in accor-

dance with the manufacturer's instructions, this

product could expose you to substances in fuel or

from fuel combustion which can cause death or seri-

ous illness.

Page 1

30816-1-0912Page 2

TABLE OF CONTENTS

IMPORTANT SAFETY INFORMATION ......................................................................................... 3

SAFETY INFORMATION FOR USERS OF LP-GAS..................................................................... 4

INTRODUCTION ........................................................................................................................... 5

BUILT-IN FIREPLACE INSTALLATION ......................................................................................... 6

FIREPLACE DIMENSIONS ........................................................................................................... 7

SPECIFICATIONS ......................................................................................................................... 8

WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM HEATERS........................................ 8

PROVISIONS FOR ADEQUATE COMBUSTION & VENTILATION AIR...................................9-10

CONNECTING THE GAS ............................................................................................................ 10

GAS SUPPLY .............................................................................................................................. 11

CLEARANCES ............................................................................................................................ 12

COMBUSTIBLE MATERIAL ........................................................................................................ 12

INSTALLATION OF FIREPLACE AND MANTEL....................................................................13-14

OUTER TRIM INSTRUCTIONS................................................................................................... 15

HOOD INSTRUCTIONS .............................................................................................................. 15

LOG PLACEMENT ...................................................................................................................... 16

PLACEMENT OF GLOWING EMBERS (ROCK WOOL)............................................................. 17

OPERATION INSTRUCTIONS/FLAME APPEARANCE.............................................................. 18

MAINTENANCE........................................................................................................................... 18

10,000 BTU MILLIVOLT LIGHTING INSTRUCTIONS................................................................. 19

MILLIVOLT LIGHTING INSTRUCTIONS..................................................................................... 20

INTERMITTENT PILOT LIGHTING INSTRUCTIONS ................................................................. 21

HYDRAULIC THERMOSTAT LIGHTING INSTRUCTIONS ......................................................... 22

PILOT FLAME CHARACTERISTICS .....................................................................................23-24

MAIN BURNER AND THERMOSTAT OPERATION .................................................................... 25

MILLIVOLT WIRING .................................................................................................................... 26

MILLIVOLT TROUBLESHOOTING.............................................................................................. 27

IP ELECTRONIC SYSTEM OPERATING INSTRUCTIONS........................................................ 28

IP ELECTRONIC SYSTEM WIRING DIAGRAM ......................................................................... 29

INTERMITTENT CONTROL SYSTEM TROUBLESHOOTING ..............................................30-32

JUNCTION BOX WIRING INSTALLATION INSTRUCTIONS...................................................... 33

PARTS LIST............................................................................................................................34-35

PARTS VIEW ............................................................................................................................... 36

FBBX BLOWER KIT EXTENSION INSTALLATION INSTRUCTIONS ...................................37-38

FBB4 OPTIONAL VARIABLE SPEED BLOWER......................................................................... 38

FPP26E OPTIONAL BRICK LINER KIT INSTALLATION INSTRUCTIONS ................................ 39

MASTER PARTS DISTRIBUTOR LIST ....................................................................................... 40

HOW TO ORDER REPAIR PARTS ............................................................................................. 40

WARRANTY ................................................................................................................................ 41

APPLIANCE SERVICE HISTORY ..........................................................................................42-43

SECTION PAGE

30816-1-0912 Page 3

When usedwithoutadequate combustionand ventilationair, heater

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

Do not install heater until all necessary provisions are

made for combustion and ventilation air. Consult the writ-

ten instructions provided with the heater for information

concerning combustion and ventilation air. In the absence

of instructions, refer to the National Fuel Gas Code, ANSI

Z223.1/NFPA 54, Air for Combustion and Ventilation, or ap-

plicable local codes.

This heater is equipped with a PILOT LIGHT SAFETY SYSTEM

designed to turn off the heater if not enough fresh air is avail-

able.

DO NOT TAMPER WITH PILOT LIGHT SAFETY SYSTEM!

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

If heater keeps shutting off, have it serviced. Keep burner and

control compartment clean.

CARBON MONOXIDE POISONING MAY LEAD TO DEATH.



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

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

serviced.

Some people — pregnant women, persons with heart or lung dis-



altitudes — are more affected by carbon monoxide than others.

The pilot light safety system senses the depletion of oxygen at

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

vertical dimension, the possibility exists that the oxygen supply

at 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

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

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



WARNING

DANGER: Indicates a hazardous situation which, if not avoided,

will result in death or serious injury.

WARNING: Indicates a hazardous situation which, if not avoid-

ed, could result in death or serious injury.

CAUTION: Indicates a hazardous situation which, if not avoided,

could result in minor or moderate injury.

NOTICE: Addresses practices not related to personal injury.

 

6,000 Btu per hour shall not be installed in a bathroom.

          

than 10,000 Btu per hour shall not be installed in a bedroom

or bathroom.

 



 

surface temperature and should stay away to avoid burns

or clothing ignition.

   

are in the same room with the appliance.

 

the appliance.

 Installation and repair should be done by a QUALIFIED

SERVICE PERSON. This appliance should be inspected before

use and at least annually by a professional 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.

 





any gas control which has been under water.

 

place. Do not close glass doors while operating heater.

 

operation.

      

components of this appliance are treated with certain oils,

        

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.

 

        

avoid potential problems with sooting. Sooting, resulting

from improper installation or operation, can settle on



installation.

 WARNING: Do not allow fans to blow directly into the



 WARNING: Do not use a blower insert, heat exchanger

insert or other accessory not approved for use with this

heater.

 

        



fresh air is not available.

        

materials, gasoline and other flammable vapors and

liquids.

THIS IS A HEATING APPLIANCE

IMPORTANT SAFETY INFORMATION

30816-1-0912Page 4



and explosions. In its natural state, propane is odorless and

colorless. You may not know all the following safety precau-

tions 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 your household. Someday when

there may not be a minute to lose, everyone's safety will depend

on knowing exactly what to do. If, after reading the following

information, you feel you still need more information, please

contact your gas supplier.

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nd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 qualied, do not light pilot lights, perform

service,ormakeadjustmentstoappliancesontheLP-Gas

system.Ifyouarequalied,consciouslythinkabouttheodor

of LP-Gas prior to and while lighting pilot lights or performing

serviceormakingadjustments.

• Sometimesabasementoraclosed-uphousehasamusty

smell that can cover up the LP-Gas odor. 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ofLP-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lledandallowed

tosettoolongbeforerelling.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 sus-

pected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. Aperiodic sniff test of the LP-gas is a

good safety measure under any condition.

• If,atanytime,youdonotsmelltheLP-Gasodorant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 odorized LP-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orices.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relledbeforeitiscompletelyempty.

NO ODOR DETECTED - ODOR FADE

Some people cannot smell well. Some people cannot smell



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.Some-

times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.

The odorant in LP-gas is colorless, and it can fade under

some circumstances. Forexample,ifthereisanunderground

leak,themovementofthegasthroughsoilcanltertheodor-

ant.OdorantsinLP-Gasalso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-Gas may 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.

LP-GAS WARNING 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-Gasis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reghtersdeclarethemtobesafe.

• Useyourneighbor'sphoneandcallatrainedLP-Gasservice

personandtheredepartment.Eventhoughyoumaynot

continue to smell gas, do not turn on the gas again. Do

notre-enterthebuilding,vehicle,trailer,orarea.

• Finally,lettheservicemanandreghterscheckfores-

capedgas.Havethemairouttheareabeforeyoureturn.

Properly trained LP-Gas service people should repair the

leak,thencheckandrelightthegasapplianceforyou.

SAFETY INFORMATION FOR USERS OF LP-GAS

30816-1-0912 Page 5

shown on the rating plate is the responsibility of the person

and company making the change.

Important

AllcorrespondenceshouldrefertocompleteModelNumber,Serial

Numberandtypeofgas.

Attention: During initial use of ceramic log you will detect an

odor as the ceramic log cures.

Notice:Duringinitialring,itspaintwillbakeoutcausingsmoke.

Topreventtriggeringofsmokealarms,ventilatetheroominwhich

the unit is installed.

Installation on Rugs and Tile

If this appliance is installed directly on carpeting, tile or other

combustiblematerialotherthanwoodooringtheapplianceshall

beinstalledonametalorwoodpanelextendingthefullwidthand

depth of the appliance.

Thebasereferredtoabovedoesnotmeanthere-proofbaseas

usedonwoodstoves.Theprotectionisforrugsthatareextremely

thickandlightcoloredtile.

Solid-fuelsshallnotbeburnedinamasonryorUL 127 factory-

builtreplaceinwhichanunventedroomheaterisinstalled.



Installationand replacement ofgas piping,gas utilization equip-

mentoraccessoriesandrepairandservicingofequipmentshall

be performed only by a  qualied agency.  The term "qualied

agency"meansanyindividual,rm,corporationorcompanywhich

either in person or through a representative is engaged in and is

responsiblefor(a)theinstallationorreplacementofgaspipingor

(b)theconnection,installation,repairorservicingofequipment,who

isexperiencedinsuchwork,familiarwithallprecautionsrequired

and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 tter in the Commonwealth of Mas-

sachusetts.

Sellersofunventedpropaneornaturalgas-redsupplemental

room heaters shall provide to each purchaser a copy of 527 CMR

30 upon sale of the unit.

In the State of Massachusetts, unvented propane and natural

gas-red space 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.*

*Available from theAmerican National Standards Institute, Inc. 1430

Broadway, New York, N.Y. 10018.

High Altitudes

Foraltitudes/elevationsabove2,000feet(610m),ratingsshouldbe

reducedattherateof4percentforeach1,000feet(305m)above

sealevel.Contactthemanufactureroryourgascompanybefore

changingspud/oricesize.

WARNING

Failure to keep the primary air opening(s) of the burner(s)

clean may result in sooting and property damage.

Instructions to Installer

1. Installer must leave instruction manual with owner after

installation.

2. Installermusthaveownerlloutandmailwarrantycardsupplied

with unvented room heater.

3. Installer should show owner how to start and operate unvented

room heater.

Always consult your local Building Department regarding regula-

tions, codes or ordinances which apply to the installation of an

unvented room heater.

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.

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/oricesize.

WARNING

ANY CHANGE TO THIS HEATER OR ITS CONTROLS CAN

BE DANGEROUS.

Improper installation or use of the heater can cause seri-

         

monoxide poisoning.

Operation

Thisunventedreplacerequiresnooutsideventing.Stateandlocal

codesinsomeareasprohibittheuseofunventedreplace.

VFD26F(M,P)3 Series, Millivolt controls

Thevalveregulatorcontrolstheburnerpressurewhichshouldbe

checkedatthepressuretestpoint.Turncapturedscrewcounter

clockwise2or3turnsandthenplacetubingtopressuregaugeover

testpoint(Usetestpoint“A”closesttocontrolknob).Aftertaking

pressurereading,besureandturncapturedscrewclockwisermly

tore-seal.Donotovertorque.Checkforgasleaks.

Millivolt System

When you ignite the pilot, the thermocouple produces millivolts

(electrical current) which energizes the magnet in the gas valve.After

30 seconds to 1 minute time period you can release the gas control

knobandthepilotwillstayON.Allowyourpilotametooperate

anadditionalonetotwominutesbeforeyouturnthegascontrol

knobfromthePILOTpositiontotheONposition.Thistimeperiod

allows the millivolts (electrical current) to build-up to a sufcient

level allowing the gas control to operate properly.

WARNING

Thisapplianceisequippedfornaturalgasorpropanegas.Field

conversion is not permitted.

General Information

ThisseriesisdesigncertiedinaccordancewithAmericanNational

StandardZ21.11.2bytheCanadianStandardsAssociationasan

UnventedRoomHeaterandshouldbeinstalledaccordingtothese

instructions.

Any alteration of the original design, installed other than as

shown in these instructions or use with a type of gas not

INTRODUCTION

30816-1-0912Page 6

BUILT-IN FIREPLACE INSTALLATION

Built-In Fireplace Installation

Built-ininstallationofthisreplaceinvolvesinstallingthereplace

intoaframed-inenclosure.Thismakesthefrontofthereplace

ush with a wall. If installing a mantel above the replace, you

must follow the clearances shown in Figure 9. Follow the instruc-

tionsbelowtoinstallthereplaceinthismanner.

Frame in rough opening. Use dimensions show in Figure 1 for a

conventional rough opening. Use dimensions shown in Figure 2

forcornerroughopening.Besuretoprovidegaslineforreplace

andelectricalpowerforoptionalblowerassembly.

1. Attachtwonailingangestoreboxsideswithtwo10x1/2"

screwsforeachnailingange.

2. Gaslineconnectionsmustbemadeatthistime.Whenfacing

the appliance, the gas supply will enter on the right-hand side.

See "Gas Supply" page 11.

3. Insertreplaceintoenclosure.

4. Attachnailingangestoframingwithascrewornail.

5. Finishedwallsurfacewillbeushtotheleadingedgeofre-

place top and sides.

6. Installationofbuilt-inreplaceiscompleted. Figure 2

Figure 3

Figure 1

Rough Opening for Installing in Wall

Rough Opening for Installing in Corner

30816-1-0912 Page 7

FIREPLACE DIMENSIONS

GAS LINE

OPENING JUNCTION BOX

ASSEMBLY

GAS LINE

OPENING

Figure 4

VFD26 Series Dimensions

IndexLetter Dimension

A30 1/4"

768mm

B30"

762mm

C13 1/8"

333mm

D18 1/8"

460mm

E26"

660mm

G25"

635mm

I36 1/4"

921mm

J36 1/4"

921mm

K51 1/4"

1302mm

30816-1-0912Page 8

SPECIFICATIONS

Model VFD26F(M,P)(3,7) VFD26F(M,P)2 VFD26FP(3,7)0L10

InputMaximum 20,000 20,000 10,000

Minimum 14,000 14,000 N/A

NAT

Orice 2.10 mm (P-288) #49 (.073") P-265 #53 (.0595") P-214

Air Shutter Opening 1/8" 1/8" 1/8"

Orice #55 (.052") P-182 #55 (.052") P-182 #64 (.036") P-193

Air Shutter Opening 1/4" 1/4" 1/4"

Fireplace Dimensions

Height 30 1/4" 30 1/4" 30 1/4"

Depth 13 1/8" 13 1/8" 13 1/8"

Front Width 30" 30" 30"

Rear Width 25" 25" 25"

Gas Inlet 3/8" 3/8" 3/8"

Accessories

FBBX BlowerExtensionKit(MUSTorderFBB4)

FBB4 Automatic Blower (MUST order FBBX)

VPS26HP Bottom Trim Kit

VF2H26HP Hammered Pewter Hood Kit

VPF26HP Hammered Pewter Trim Kit

FPP26E BrickLiner

VPL26HP Hammered Pewter Slat Louver

Accessories for Millivolt VFD26F(M,P)(3,7) Only

FRBC Battery Operated Remote Control

FRBTC Battery Operated Remote Control w/Thermostat

FREC Electric Remote Control

FWS-1 Wall Switch

TMV Wall Thermostat, Millivolt - Reed Switch

TRW Wireless Remote Wall Thermostat

Watervaporisaby-productofgascombustion.Anunventedroom

heaterproducesapproximatelyoneounce(30ml)ofwaterforevery

1,000BTU's(.3KW's)ofgasinputperhour..

Unvented room heaters are recommended 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dehumidier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.

WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM HEATERS

30816-1-0912 Page 9

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

Vent-free heater BTU/Hr

Gas water heater BTU/Hr

Gas furnace BTU/Hr

Vented gas heater BTU/Hr

Gasreplacelogs BTU/Hr

Othergasappliances* + BTU/Hr

Total = BTU/Hr

Example: Ventedgasheater 20,000 BTU/Hr

  Vent-freeheater + 18,000 BTU/Hr

Total = 38,000 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:

  25,600 BTU/Hr(maximumthespacecansupport)

38,000 BTU/Hr (actual amount of BTU/Hr used)

WARNING

Iftheareainwhichtheheatermaybeoperatedissmallerthanthat

denedasanunconned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,AirforCombustionandVentilation,

orapplicablelocalcodes.

Thespaceintheaboveexampleisaconned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unconnedspace,removedoor

toadjoiningroomoraddventilationgrillsbetweenrooms.See

Ventilation Air From Inside Building.

B. Vent room directly to the outdoors. See Ventilation Air From

Outdoors.

C. InstallalowerBTU/Hrheater,iflowerBTU/Hrsizemakesroom

unconned.

IftheactualBTU/HrusedislessthanthemaximumBTU/Hrthe

spacecansupport,thespaceisanunconnedspace.Youwillneed

no additional fresh air ventilation.

WARNING



space.

Thisheater shall not be installedin a conned space orunusu-

allytightconstructionunlessprovisionsareprovidedforadequate

combustionandventilationair.

Aconnedspaceisanareawithvolumelessthan50cubicfeetper

1,000Btuhofthecombinedinputratesofallappliancesdrawing

combustionairfromthatspace.Smallareassuchasequipment

roomsareconnedspaces.Furnacesinstalledinaconnedspace

which supply heated air to areas outside the space must draw return

air from outside the space through tightly sealed return air ducts. A

connedspacemusthave2openingsintothespaceforcombus-

tionair.Oneopeningmustbewithin12inchesoftheceilingand

theothermustbewithin12inchesoftheoor.Therequiredsizing

oftheseopeningsisdeterminedbywhetherinsideoroutsideairis

usedtosupportcombustion,themethodbywhichtheairisbrought

tothespace(verticalorhorizontalduct)andbythetotalinputrate

of all appliances in the 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.

      

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. Weatherstripping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

oors,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 “Ventilation Air From Outdoors,” page

10.



Usethisworksheettodetermineifyouhaveaconnedorunconned

space.

Space: Includes the room in which you will install heater plus any

adjoining rooms with doorless passageways or ventilation grills

betweentherooms.

1.Determinethevolumeofthespace(lengthxwidthxheight).

 LengthxWidthxHeight= cu. ft. (volume of

space)

Example:Spacesize16ft.(length)x10ft.(width)x8ft.(ceiling

height) = 1,280 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:1,280cu.ft.(volumeofspace)÷50cu.ft.=25.6or

25,600(maximumBTU/Hrthespacecansupport)

PROVISIONS FOR ADEQUATE COMBUSTION & VENTILATION AIR

30816-1-0912Page 10

VENTILATION AIR

Ventilation Air From Inside Building

Thisfreshairwouldcomefromanadjoiningunconnedspace.When

ventilatingtoanadjoiningunconnedspace,youmustprovidetwo

permanent openings: one within 12" of the ceiling and one within

12"oftheoor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). Each ventilation grill or opening shall have

aminimumfreeareaofonesquareinchper1,000BTU/HRofthe

totalinputratingofthegasequipmentintheconnedspace.

Figure 5

WARNING

Rework worksheet, adding the space of the adjoining



fresh air to supply all appliances in both spaces.

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with12"oftheoor.Connecttheseitemsdirectlytotheoutdoors

or spaces open to the outdoors. These spaces include attics and

crawl spaces. In most cases for direct communication with the

outdoors or direct communication through a vertical duct a free

areaopeningofonesquareinchper4,000BTU/HRofheaterinput

rating for each grill. If a horizontal duct is used, a grill free area or

ductopeningshallhaveafreeareaopeningofonesquareinchper

2,000 BTU/HR for each grill. Follow the National Fuel Code, ANSI

Z223.1/NFPA 54, Air for Combustion and Ventilation, or applicable

local codes,forrequiredsizeofventilationgrillsorducts.

IMPORTANT: Do not provide openings 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.

Figure 6

PROVISIONS FOR ADEQUATE COMBUSTION & VENTILATION AIR

CONNECTING THE GAS

The inlet connection is located on the right side of the gas valve.

Attach gas inlet line to gas valve.

IfinstallingtheanOptionalBlower,itmustbeinstalledbefore

connecting the gas line.

This manual suits for next models

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