Empire Comfort Systems VFL20IN3 series Quick start guide
INSTALLATION INSTRUCTIONS
AND OWNER'S MANUAL
UNVENTED
GAS FIREPLACE
MODELS
VFL20IN3(0,1,2,3)10(N,P)-1
VFL20IN3(0,1,2,3)(N,P)-1
VFL20IN7(0,1,2,3)(N,P)-1
VFL28IN3(0,1,2,3)(N,P)-1
VFL28IN7(0,1,2,3)(N,P)-1
GAS-FIRED
Loft Vent Free Fireplace Insert
vapors and liquids in the vicinity of this or any
other appliance.
— WHAT TO DO IF YOU SMELL GAS
instructions.
-
plier.
or loss of life.
EMPIRE
EMPIRE
Comfor t Systems
Shown without required front.
indicated on the rating plate. This appliance is not
-
provided. Refer to page 15.
serious illness.
WATER VAPOR:A BY-PRODUCT OF UNVENTED ROOM
HEATERS
of gas input per hour. Refer to page 15.
Page 1
28040-3-0511Page 2
TABLE OF CONTENTS
Quick Start Guide - Intermittent Pilot Systems......................................................3-4
Safety Information for Users of LP-Gas ...................................................................6
Important Safety Guidelines.....................................................................................7
Introduction ..............................................................................................................8
Specications ...........................................................................................................9
Installation in a Fireplace .......................................................................................10
Fireplace Insert Dimensions................................................................................... 11
Built-In Fireplace Installation ..................................................................................12
VFL20IN Fireplace with Surround Dimensions ......................................................13
VFL28IN Fireplace with Surround Dimensions ......................................................14
Water Vapor: A By-Product of Unvented Room Heaters ........................................15
Provisions for Adequate Combustion & Ventilation Air......................................15-16
Gas Supply........................................................................................................17-18
Clearances ........................................................................................................18-20
Combustible Materials............................................................................................21
Alternate On/Off Switch Installation .......................................................................22
Decorative Accessory Installation ..........................................................................23
Millivolt Control Valve Lighting Instructions ............................................................24
10,000 BTU Millivolt Control Valve Lighting Instructions........................................25
Intermittent Pilot Lighting Instructions ....................................................................26
Intermittent Pilot Operating Instructions .................................................................27
Intermittent Pilot Remote Electronic Ignition and Control System.....................28-31
Intermittent Pilot Wiring Diagram ...........................................................................32
Operation Instructions/Flame Appearance.............................................................33
Pilot Flame Characteristics ...............................................................................34-35
Cleaning and Servicing ..........................................................................................35
Wiring .....................................................................................................................36
Maintenance...........................................................................................................36
Troubleshooting......................................................................................................37
Master Parts Distributor List...................................................................................38
How To Order Repair Parts ....................................................................................38
VFL20IN Parts List .................................................................................................39
VFL28IN Parts List .................................................................................................40
Exploded View .......................................................................................................41
Surround Fronts ................................................................................................42-43
SECTION PAGE
28040-3-0511 Page 3
To START the Fireplace:
If the pilot is NOT lit:
1. Atthesametime,pressthe“OFF”andhighamebuttonsandreleaseoncethereisan
audible “beep” sound.
2. The pilot will ignite on the sixth beep. You may hear a clicking sound around the same
time as that beep, this is normal.
3. There will be a total of 14 beeps. The main burner will ignite approximately 15 seconds
after the pilot.
If the pilot IS lit.
1. Toignitetheburner,pressthehighamebutton(therewillbeabeep)forapproximately
5 seconds until there is a soft click, then release the button.
1. Pressandholdtheupperrightbuttonforahigherame.
2. Pressandholdthelowerrightbuttonforalowerame.Note:Ifyouholdthelowerright
buttonfortoolong,theamesonthemainburnerwillgoout,buttheignitorwillstaylit.
To SHUT OFF the Fireplace
1. To completely shut off the burner and ignitor, press and hold the “OFF” button until the
unit“beeps.”Theameswillgoontheburneroutonceanylingeringgasisusedup.
2. Toshutofftheburnerbutkeeptheignitoron,pushthelowamebutton(bottomright)for
10 seconds and then release.
FOR MORE INFORMATION, SEE OPERATION INSTRUCTIONS.
Cut out this page and keep it near your remote.
28040-3-0511Page 4
THIS PAGE INTENTIONALLY LEFT BLANK
28040-3-0511 Page 5
-
ous gas.
Do not install heater until all necessary provisions are
-
of instructions, refer to the National Fuel Gas Code, ANSI
PILOT LIGHT SAFETY SYSTEM
designed to turn off the heater if not enough fresh air is
DO NOT TAMPER WITH PILOT LIGHT SAFETY SYSTEM!
If heater shuts off, do not relight until you provide fresh air.
headache, dizziness and/or nausea. If you have these signs,
Get fresh air at once! Have
heater serviced.
others.
its location. If this heater is installed in a structure having a high
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
avoided, 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.
or clothing ignition.
near the appliance.
QUALIFIED
SERVICE PERSON.
clean.
during operation.
period.
location of theheaterandannual cleaningarenecessary to
installation.
patterns.
heater.
section in the instructions.
liquids.
IMPORTANT SAFETY INFORMATION
28040-3-0511Page 6
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.
For example, if there is an underground leak, the
movementofthegasthroughsoilcanltertheodorant.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.
-
contact your gas supplier.
• Learn to recognize the odor of LP-gas. Your local LP-Gas
Dealer can give you a "Scratch and Sniff" pamphlet. Use it to
ndoutwhatthepropaneodorsmellslike.Ifyoususpectthat
your LP-Gas has a weak or abnormal odor, call your LP-Gas
Dealer.
• Ifyouarenotqualied,donotlightpilotlights,performservice,
or make adjustments to appliances on the LP-Gas system. If
youarequalied,consciouslythinkabouttheodorofLP-Gas
prior to and while lighting pilot lights or performing service or
making adjustments.
• Sometimesabasementoraclosed-uphousehasamusty
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.
• Odorfade,duetooxidationbyrustoradsorptiononwallsof
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
reinstalledoldtanks,iftheyarelledandallowedtosettoo
longbefore relling. 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
LP-gas dealer. A
periodic sniff test of the LP
under any condition.
• If,atanytime,youdonotsmelltheLP-Gasodorantandyou
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.
• Ifyouexperienceacomplete"gasout,"(thecontainerisun-
dernovaporpressure),turnthetankvalveoffimmediately.
If the container valve is left on, the container may draw in
someairthroughopeningssuchaspilotlightorices.Ifthis
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
relledbeforeitiscompletelyempty.
• Do not operate electric switches, light matches, use your
phone. Do not do anything that could ignite the gas.
• Geteveryoneoutofthebuilding,vehicle,trailer,orarea.Do
that IMMEDIATELY.
• Closeallgastankorcylindersupplyvalves.
• LP-Gasisheavierthanairandmaysettleinlowareassuch
as basements. When you have reason to suspect a gas leak,
keep out of basements and other low areas. Stay out until
reghtersdeclarethemtobesafe.
• Useyourneighbor'sphoneandcallatrainedLP-Gasservice
personandthe redepartment.Even thoughyou maynot
continue to smell gas, do not turn on the gas again. Do not
re-enter the building, vehicle, trailer, or area.
• Finally,lettheservicemanandreghterscheckforescaped
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.
SOME POINTS TO REMEMBER
NO ODOR DETECTED - ODOR FADE
LP-GAS WARNING ODOR
SAFETY INFORMATION FOR USERS OF LP-GAS
28040-3-0511 Page 7
For proper burner operation and ame appearance, the ow of
primary air into the venturi tube, located on the rear of the burner,
mustnotbereduced.Thisowofairisreducedifdirt,lintorother
obstructions build-up around or inside the venturi. Any obstruction
intheventuritubeareamustberemoved.Theowofairintothe
venturiisalsoreducedifthegasoriceisn’tcenteredintheventuri
inlet and/or is not aligned with the venturi. Any misalignment of the
burneroricemaybecorrectedbybendingtheshuttercapholding
theoricetotheinletoftheventuritube.
Returns
Ceiling fans or oscillating oor type fans need to be monitored
during the operation of vent-free logs. If the air blows directly
intotheamecausingittodisrupttheame,disrupttheame,it
should be turned off or redirected. Ceiling fans could be reversed
topossiblyeliminateameimpingement,andtheoorfancould
be redirected. Upon installation, be aware of any cold air returns
or vents in the proximity of the log set. Any draft created around
avent-freelogsetcancausetheametoimpingeonthelogand
create a sooting situation.
WARNING
Donotallowfanstoblowdirectlyintothereplace.Avoidany
draftsthatalterburneramepatterns.
WARNING
Do not use a blower insert, heat exchanger insert or other
accessory not approved for use with this heater.
Candles
Avoid the use of scented or decorative candles while the log set is
in operation. Candles produce a residue in the air that creates a
soot like substance. Burning candles while the log set is operating
magniestheproblem.Itshouldbenotedthatcandles,ingeneral,
produce soot. The amount of time burned and the quantity of
candles burned will determine the amount of soot produced and
deposited.
IMPORTANT INSTALLATION GUIDELINES
28040-3-0511Page 8
Notice: Duringinitialringofthisunit,itspaintwillbakeout,and
smoke will occur. 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
combustiblematerialotherthanwoodooringtheapplianceshall
be installed on a metal or wood panel extending the full width and
depth of the appliance.
Thebasereferredtoabovedoesnotmeanthere-proofbaseas
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-
builtreplaceinwhichanunventedroomheaterisinstalled.
Installation and replacement of gas piping, gas utilization equipment
or accessories and repair and servicing of equipment shall be
performedonlybyaqualiedagency.Theterm"qualiedagency"
meansanyindividual,rm,corporationorcompanywhicheitherin
personorthrougha representativeis engaged inandis responsible for
(a)theinstallationorreplacementofgaspipingor(b)theconnection,
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
Massachusetts.
Sellersofunventedpropaneornaturalgas-redsupplemental
room heaters shall provide to each purchaser a copy of 527
CMR 30 upon sale of the unit.
In the Sate of Massachusetts, unvented propane and natural
gas-redspaceheatersshallbeprohibitedinbedroomsand
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 the American National Standards Institute, Inc. 1430
Broadway, New York, N.Y. 10018.
High Altitudes
Foraltitudes/elevationsabove2,000feet(610m),ratingsshouldbe
reducedattherateof4percentforeach1,000feet(305m)above
sea level. Contact the manufacturer or your gas company before
changingspud/oricesize.
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/oricesize.
WARNING
Thisapplianceisequippedfor(naturalgasorpropane)gas.Field
conversion is not permitted.
Instructions to Installer
1. Installer must leave instruction manual with owner after
installation.
2. Installermusthaveownerlloutandmailwarrantycardsupplied
with unvented room heater.
3. Installer should show owner how to start and operate unvented
room heater.
Always consult your local Building Department regarding regulations,
codes or ordinances which apply to the installation of an unvented
room heater.
This appliance may be installed in an aftermarket* manufactured
(mobile)home,wherenotprohibitedbystateorlocalcodes.
*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.
WARNING
ANY CHANGE TO THIS HEATER OR ITS CONTROLS CAN
BE DANGEROUS.
poisoning.
ThisseriesisdesigncertiedinaccordancewithAmericanNational
Standard Z21.11.2 by the Canadian Standards Association
Laboratories as an Unvented Room Heater and should be installed
according to these instructions.
Any alteration of the original design, installed other than as
Millivolt 3 Series Only
When you ignite the pilot, the thermocouple produces millivolts
(electricalcurrent)whichenergizesthemagnetinthegasvalve.
After 30 seconds to 1 minute time period you can release the gas
controlknobandthepilotwillstayON.Allowyourpilotameto
operateanadditionalone(1)totwo(2)minutesbeforeyouturnthe
gas control knob from the PILOT position to the ON position. This
timeperiodallowsthemillivolts(electricalenergy)tobuild-uptoa
sufcientlevelallowingthegascontroltooperateproperly.
All correspondence should refer to complete Model Number, Serial
Number and type of gas.
INTRODUCTION
28040-3-0511 Page 9
Accessories for VFL(20,28)IN3 (Millivolt) Models
Accessories
Description
FRBC Battery Operated Remote Control
FRBTC Battery Operated Remote Control with
Thermostat
FRBTP Battery Operated Programmable Remote
Control
FREC Electric Remote Control
FWS-1 Wall Switch
TRW RemoteWallThermostat(Wireless)
TMV Wall Thermostat, Millivolt - Reed Switch
VFL20IN3* LP NAT
Input Btu/hr Maximum 20,000 20,000
Btu/hr Minimum 16,000 13,000
Orice #55 #48
Air Shutter Opening 3/16" Fully Closed
VFL20IN7* LP NAT
Input Btu/hr Maximum 20,000 20,000
Btu/hr Minimum 14,000 13,000
Orice #55 #48
Air Shutter Opening 3/16" Fully Closed
VFL20IN3*10 LP NAT
Input Btu/hr Maximum 10,000 10,000
Btu/hr Minimum 10,000 10,000
Orice #64 #53
Air Shutter Opening Fully Closed Fully Closed
VFL28IN3* LP NAT
Input Btu/hr Maximum 28,000 28,000
Btu/hr Minimum 23,000 19,000
Orice 1.55 #40
Air Shutter Opening 3/16" Fully Closed
VFL28IN7* LP NAT
Input Btu/hr Maximum 28,000 28,000
Btu/hr Minimum 23,000 19,000
Orice 1.55 #40
Air Shutter Opening 3/16" Fully Closed
VFL20IN units require the use of one of the following surrounds:
Description
DF20GBL Decorative Front, Tempered Glass, Black
DF20MBL Decorative Front, Metal Frame, Black
DF20LBL DecorativeFront,Louver,GlassFrame(In-
cludes6x6Surround)
VFL28IN units require the use of one of the following surrounds
Surround Kit Description
DF28GBL Decorative Front, Tempered Glass, Black
DF28MBL Decorative Front, Metal Frame, Black
DF28LBL DecorativeFront,Louver,GlassFrame(In-
cludes6x6Surround)
VFL20IN Optional Accessories
Description
FBB7 Variable Speed Blower
DG18BKP Decorative Glass Black Polished
DG18BUC Decorative Glass Blue Clear
DG18CLF Decorative Glass Frost
VFL28IN Optional Accessories
Description
FBB7 Variable Speed Blower
DG24BKP Decorative Glass Black Polished
DG24BUC Decorative Glass Blue Clear
DG24CLF Decorative Glass Frost
VFL(20,28)IN7 Accessory
SH1BL AC Power Adaptor for IP Units
SPECIFICATIONS
28040-3-0511Page 10
1. Before beginning, check to make sure there is no hidden dam-
age to the unit. Take a minute and plan out the gas and electri-
calroute.Itisbesttostartwiththegaslinerst,followedby
the electrical supply requirements.
2. Minimum replace opening requirements are shown in
Figure 2 of this installation manual. The rebrick (refrac-
tory),glassdoors,screenrails,screenmeshandloggrates
can be removed from a factorybuiltreplace in order to gain
minimum gas insert opening requirements prior to installing
thegasreplaceinsert.
Caution:Determinethe totalthickness ofnishing materials
(i.e. stone, brick or marble) so that the proper dimensions
canbemaintainedforinstallingthereplaceanddecorative
fronts.
3. This insert requires no hearth extensions. Combustible ma-
terial on the oor may be installed up to the insert. Do not
obstructthelowerlouveroftheinsert.Theoriginalreplace
cannot be returned to solid fuel in this condition.
4. Thesidewalls,topandoorstructuresofthereboxmaynot
bealteredwiththeexceptionofremovablebafesanddamp-
ers.Smokeshields,shelves andbafes maybe removedif
attached with mechanical fasteners. The original replace
cannot be returned to solid fuel in this condition.
5. The insert surround is tested and approved with this gas in-
sert and may cover existing air circulation vents or grills on the
solidfuelreplaceitisinstalledinto.Ifthesurrounddoesnot
cover the entire ventilation grill surface, the exposed grill area
should be left open.
Notice
Notice-
-
erence as required.
WARNING
-
See "Positioning, Leveling and Securing Insert" below.
6. Install the insert without the surround panels attached and
make all gas venting and electrical connections.
-
7. Thesurround panel assembly isinstalledafter the replace
has been installed with all the gas and electrical connections
completed. Refer to instructions included with the surround
panel kit.
Positioning, Leveling and Securing Insert
1. Place the insert into position
Notice: Thefrontangesoftheinsert(withoutsurroundpanels)
should be set at approximately 1" in front of the face of
thereplace.
2. Level the insert from side to side and front to back.
3. If necessary, use the leveling bolts included in the instruction
pack. Screw the legs into the nuts installed in the bottom of
the insert. Turn legs in until insert is level.
Notice: The best way to access the leveling bolt locations is
toremovetheburnerandreboxbottom.
INSTALLATION IN A FIREPLACE
28040-3-0511 Page 11
FIREPLACE INSERT DIMENSIONS
A
D
E
B
C
F
G
H
I
J
K
Figure 1
Whenplanningareplaceinsertinstallation,it’snecessaryto
determine:
• Gassupplypiping.
• Electricalconnections-foroptionalblower
• Whetheroptionalaccessories-devicessuchasawallswitch
or remote control - are desired.
• Electricalsupplyrequirementsforoptionalblower.
(120V,60Hz,1Amp)
• Properopeningsizeofreplacerequiredforinstallationof
thereplaceinsert.
A
D
C
B
Figure 2
VF FIREPLACE INSERT DIMENSIONS
MODEL A B C D E F G H I J K
VFL20IN 29 1/4" 19 3/4" 12 7/16" 25 5/8" 16 3/16" 13 9/16" 25 3/4" 18 1/8" 15/16" 13 1/2" 1 5/8"
VFL28IN 32 1/4" 22 3/4" 15 7/16" 28 1/2" 17 13/16" 15" 29 1/2" 21 1/8" 15/16" 15" 1 5/8"
MINIMUM FIREPLACE OPENING DIMENSIONS
MODEL HEIGHT
A
FRONT
WIDTH B
DEPTH
C
REAR
WIDTH D
VFL20IN 19 1/4" 26 3/4" * 12 3/4" 15 3/4"
VFL28IN 22 1/4" 30 3/4" * 14 1/4" 19"
Notice: Thesearetheminimumdimensionsofareplacethatthe
replaceinsertwilltinto.Itallowsroomfortheboxand
thereplacesurroundtotontothefrontoftheunit.Itis
not intended to be used for framing dimensions. Refer to
Figures 3 to 5 for framing dimensions.
*Notice: Front Width B is the minimum and maximum dimension.
28040-3-0511Page 12
In planning the installation for the replace, it is necessary to
determine where the unit is to be installed and whether optional
accessories are desired. Gas supply piping should also be planned
at this time.
Thereplacecanbemountedonanyofthesesurfaces:
1. Aathardcombustibleornon-combustiblesurface.
2. A raised platform of combustible or non-combustible material.
3. Four(4)cornersofthereplacesocontactismadeonallfour
perimeter edges on the bottom of the unit.
(Example:Four(4)concretemasonryblocks.)
If the fireplace is installed directly on carpeting, tile or other
combustiblematerialotherthanwoodooring,itshouldbeinstalled
on a metal or wood panel extending the full width and depth of the
unit.
At this point, you should have decided what components to include
inyourinstallation,andwherethereplaceistobelocated.Ifthis
has not been done, stop and consult your dealer for assistance
with this planning.
This unit is designed to be installed in a zero-clearance enclosure.
This means the combustible material can come in contact with the
rebox.
Built-In Fireplace Installation
Built-in installation of this replace involves installing the
replaceintoaframed-inenclosure.This makesthe frontof the
replaceushwithawall.
Frame in rough opening. Use dimensions show in Figure 3 for a
conventional rough opening. Use dimensions shown in Figure 4
for corner rough opening. Use Figure 5 for an elevated installation.
Besuretoprovidedsupporttothebottomofthereplace.Besure
toprovidegas linefor replaceandelectrical powerfor optional
blower assembly.
1. 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 17 to 18.
2. Insert replace into enclosure. Attach to wall with screws
through holes on cabinet sides.
3. Levelrebox.See"Positioning,LevelingandSecuringInsert"
on Page 10.
4. Finishedwallsurfacewillbeushtotheleadingedgeofre-
place top and sides.
5. Ifused,thesurroundpanelassemblyisinstalledafterthere-
place has been installed with all the gas and electrical con-
nection completed. Refer to instructions included with the sur-
round panel kit.
6. Installationofbuilt-inreplaceiscompleted.
Rough Opening for Installing in Wall Rough Opening for Installing in Corner Rough Opening for Elevated Installation
FLUSH
INSTALLATION
PROJECTED
INSTALLATION
1” TO 6” FROM BACK
25mmTO 152mm
ELECTRICAL RECEPTACLE
71/2” (190.5mm)
GASSUPPLY
B
C
A
D
25 5/8”
650.9mm
B
51 1/4” (1301.8mm)
FLUSH
INSTALLATION
PROJECTED
INSTALLATION
1” TO 6” FROM BACK
25mmTO 152mm
ELECTRICAL RECEPTACLE
71/2” (190.5mm)
GASSUPPLY
B
C
A
6” MINIMUM
Figure 3 Figure 4 Figure 5
A B C D
VFL20IN 13 3/4"
(349.3mm)
27 3/4"
(704.9mm)
19 1/4"
(489mm)
36 1/4"
(920.8mm)
VFL28IN 16 3/4"
(425.5mm)
30 1/2"
(774.7mm)
22 1/2"
(571.5mm)
36 1/4"
(920.8mm)
BUILT-IN FIREPLACE INSTALLATION
28040-3-0511 Page 13
VFL20IN FIREPLACE WITH SURROUND DIMENSIONS
2 1/4”
23 13/32”
37 3/8”
DF20MBL
39 15/16”
25 1/2”
1 3/4”
DF20LBL
34”
25”
20 1/2”
11 1/2”
4 19/64”
DF20GBL
28040-3-0511Page 14
37”
23 1/2”
4 9/32”
43”
28 5/8”
1 3/4”
40 5/8”
26 15/32”
2 11/32”
VFL28IN FIREPLACE WITH SURROUND DIMENSIONS
DF28GBL
DF28LBL
DF28MBL
28040-3-0511 Page 15
Water vapor is a by-product of gas combustion. An unvented room
heaterproducesapproximatelyone(1)ounce(30ml)ofwaterfor
every1,000BTU's(.3KW's)ofgasinputperhour.
Unventedroomheatersarerecommendedassupplementalheat(a
room)ratherthanaprimaryheatsource(anentirehouse).Inmost
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. Ifhighhumidityisexperienced,adehumidiermaybeusedto
help lower the water vapor content of the air.
3. Do not use an unvented room heater as the primary heat
source.
Thisheatershallnotbeinstalledinaconnedspaceorunusually
tight construction unless provisions are provided for adequate
combustion and ventilation air.
Aconnedspaceisanareawithvolumelessthan50cubicfeetper
1,000 Btuh of the combined input rates of all appliances drawing
combustion air from that space. Small areas such as equipment
roomsareconnedspaces.Furnacesinstalledinaconnedspace
which supply heated air to areas outside the space must draw return
air from outside the space through tightly sealed return air ducts. A
connedspacemusthave2openingsintothespaceforcombustion
air. One opening must be within 12 inches of the ceiling and the
othermustbewithin12inchesoftheoor.Therequiredsizingof
these openings is determined by whether inside or outside air is
used to support combustion, the method by which the air is brought
tothespace(verticalorhorizontalduct)andbythetotalinputrate
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.
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-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
oors,betweenwall-ceilingjoints,betweenwallpanels,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 page
16.
Usethisworksheettodetermineifyouhaveaconnedorunconned
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. Determinethevolumeofthespace(lengthxwidthxheight).
Length x Width x Height = cu.ft.(volumeof
space)
Example:Spacesize16ft.(length)x10ft.(width)x8ft.(ceiling
height)=1,280cu.ft.(volumeofspace)
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.
(volumeofspace)÷50cu. ft.=(maximum
BTU/Hrthespacecansupport)
Example:1,280cu.ft.(volumeofspace)÷50cu.ft.=25.6or
25,600(maximumBTU/Hrthespacecansupport)
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
Gasreplacelogs 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(maximumthespacecansupport)
BTU/Hr(actualamountofBTU/Hrused)
Example:
25,600 BTU/Hr(maximumthespacecansupport)
38,000 BTU/Hr(actualamountofBTU/Hrused)
WARNING
If the area in which the heater may be operated is smaller than that
denedasanunconnedspaceorifthebuildingisofunusually
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.
WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM HEATERS
PROVISIONS FOR ADEQUATE COMBUSTION & VENTILATION AIR
28040-3-0511Page 16
Thespaceintheaboveexampleisaconnedspacebecausethe
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
theextraspaceprovidesanunconnedspace,removedoor
to adjoining room or add ventilation grills between rooms. See
B. Vent room directly to the outdoors. See
Outdoors.
C. Install a lower BTU/Hr heater, if lower BTU/Hr size makes room
unconned.
If the actual BTU/Hr used is less than the maximum BTU/Hr the
spacecansupport,thespaceisanunconnedspace.Youwillneed
no additional fresh air ventilation.
WARNING
space.
Ventilation Air
Thisfreshairwouldcomefromanadjoiningunconnedspace.When
ventilatingtoanadjoiningunconnedspace,youmustprovidetwo
permanent openings: one within 12" of the ceiling and one within
12"oftheooronthewallconnectingthetwospaces(seeoptions
1and2,Figure6).Youcanalsoremovedoorintoadjoiningroom
(seeoption3,Figure6).Eachventilationgrilloropeningshallhave
a minimum free area of one square inch per 1,000 BTUH of the total
inputratingofthegasequipmentintheconnedspace.
WARNING
.
Provide extra fresh air by using ventilation grills or ducts. You must
provide two permanent openings: one within 12" of the ceiling and
onewith12"oftheoor.Connecttheseitemsdirectlytotheoutdoors
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/NFPA54, Air for Combustion and Ventilation 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 7
PROVISIONS FOR ADEQUATE COMBUSTION & VENTILATION AIR (continued)
A1 A2
B1 B2
A1 x B1 = C1
A2 x B2 = C2
C1 + C2 = Sq. In. Required
For a 30,000 BTU Heater, 1 sq in per 1,000 BTU
equals 30 sq. in. of opening.
(A1)5in2x(B1)3in2=(C1)15in2
(A2)5in2x(B2)3in2=(C2)15in2
(C1)15in2+(C2)15in2= 30in2
Figure 8
28040-3-0511 Page 17
Figure 9
The gas pipeline can be brought in through the right or left side of
the appliance. The insert has a Flexline with shutoff valve located on
the right side when facing the unit. See Figures 9 and 10. Consult
the current National Fuel Gas Code, ANSI Z223.1 CAN/CGA-B149
(.1or.2)installationcode.
Each appliance should have its own manual gas cock.
A manual main gas cock should be located in the vicinity of the unit.
Where none exists, or where its size or location is not adequate,
contact your local authorized installer for installation or relocation.
Compounds used on threaded joints of gas piping shall be resistant
totheactionofliqueedpetroleumgases.Thegaslinesmustbe
checked for leaks by the installer. This should be done with a soap
solution watching for bubbles on all exposed connections, and if
unexposed, a pressure test should be made.
Notice: The millivolt gas controls are equipped with a captured screw
type pressure test point, therefore it is not necessary to provide a
1/8" test point up stream of the control.
Whenusingcopperorexconnectoruseonlyapprovedttings.
Theapplianceandit’sindividualshutoffvalvemustbedisconnected
from supply piping system during any pressure testing of that system
attestpressuresinexcessof1/2psig(3.5kPa).
The appliance must be isolated from the gas supply piping system
by closing its individual manual shut off valve during any pressure
testing of the gas supply piping system at test pressures equal to
orlessthan1/2psig(3.5kPa).
Attention! If one of the procedures results in pressures in excess of
1/2psig(14"w.c.)(3.5kPa)onthereplacegasvalve,itwillresult
in a hazardous condition.
Caution:Neveruseplasticpipe.Checktoconrmwhetheryour
local codes allow copper tubing or galvanized.
Notice:Since some municipalities have additional local codes, it is
always best to consult your local authority and installation code.
The use of the following gas connectors is recommended:
— ANS Z21.24Appliance Connectors of Corrugated Metal Tubing
and Fittings.
— ANS Z21.45Assembled FlexibleAppliance Connectors of Other
Than All-Metal Construction
The above connectors may be used if acceptable by the authority
havingjurisdiction.ThestateofMassachusettsrequiresthataexible
appliance connector cannot exceed three feet in length.
Pipe Length Schedule 40 Pipe
Nat. L.P. Nat. L.P.
0-10ft
0-3m
1/2"
12.7mm
3/8"
9.5mm
1/2"
12.7mm
3/8"
9.5mm
11-40ft
4-12m
1/2"
12.7mm
1/2"
12.7mm
5/8"
15.9mm
1/2"
12.7mm
41-100ft
13-30m
1/2"
12.7mm
1/2"
12.7mm
3/4"
19mm
1/2"
12.7mm
101-150ft
31-46m
3/4"
19mm
1/2"
12.7mm
7/8"
22.2mm
3/4"
1.9 mm
GAS SUPPLY
GAS FLEX LINE WITH
SHUTOFF VA LV E
(PROVIDED)
FRONT OF
INSERT
RIGHT SIDE OF INSERT
Figure 10
28040-3-0511Page 18
8”
MINIMUM CLEARANCE
TO PERPENDICULAR
COMBUSTIBLE SIDE-WALL
Figure 11
Propane gas will have a manifold pressure approximately 10.0"w.c.
at the pressure regulator outlet with the inlet pressure to the pressure
regulator from a minimum of 11.0"w.c. for the purpose of input
adjustment to a maximum of 13.0"w.c.
A test gage connection is located downstream of the gas appliance
pressure regulator for measuring gas pressure. The connection is
a 1/8 inch N.P.T. plugged tapping.
Millivolt Control Valve
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
testpoint(Usetestpoint“A”closesttocontrolknob).Aftertaking
pressure reading,
Do not over torque. Check for gas leaks.
MILLIVOLT VALVES
Natural gas will have a manifold pressure of approximately 3.5" w.c.
for maximum input or 1.7" w.c. for minimum input at the pressure
regulator outlet with the inlet pressure to the pressure regulator
from a minimum of 4.5" w.c. for the purpose of input adjustment to
a maximum of 10.5" w.c.
Propane gas will have a manifold pressure approximately 10.0"w.c.
(2.49kPa)formaximuminputor4.9"w.c.forminimuminputatthe
pressure regulator outlet with the inlet pressure to the pressure
regulator from a minimum of 11.0"w.c. for the purpose of input
adjustment to a maximum of 13.0"w.c.
INTERMITTENT PILOT VALVES
Natural gas will have a manifold pressure of approximately 3.5"
w.c. at the pressure regulator outlet with the inlet pressure to the
pressure regulator from a minimum of 7.0" w.c. for the purpose of
input adjustment to a maximum of 10.5" w.c.
GAS SUPPLY (continued)
CLEARANCES
28040-3-0511 Page 19
FINISHED WALL
FLAT MANTEL SHELF
2”
15”
11”
4”
6”
8”
10”
12”
13”
17”
19”
21”
VFL20 Series Figure 12
FINISHED WALL
FLAT MANTEL SHELF
2”
20”
16”
4”
6”
8”
10”
12”
18”
22”
24”
26”
CLEARANCES (continued)
VFL28 Series Figure 13
28040-3-0511Page 20
CLEARANCES (continued)
FLOOR
26” MIN.
CEILING
NO MANTEL
TOP OF FIREPLACE OPENING
BOTTOM OF FIREPLACE
5”
FLOOR
26” MIN.
CEILING
NO MANTEL
TOP OF FIREPLACE OPENING
4”
BOTTOM OF FIREPLACE
Surround Clearances Figure 14
Glass Front Clearances Figure 15
Figures14and15pertaintoVFL(20,28)INSeries.
Other manuals for VFL20IN3 series
2
This manual suits for next models
43
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