Superior STANDARD SERIES and User manual

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE. 1
Unvented See-Through Gas Log Room Heaters
P/N 903588 REV. G 12/2007
VFST-27VSN-2 VFST-27VSP-2
MODELS
STANDARD SERIES
FOR USE ONLY WITH DECORATIVE TYPE UNVENTED ROOM
HEATERS.
DO NOT BUILD A WOOD FIRE.
FOR YOUR SAFETY: Do not store or use gasoline
orotherflammablevaporsorliquidsinthevicinity
of this or any other appliance.
FOR YOUR SAFETY: What to do if you smell gas:
• DO NOT light any appliance.
• DO NOT touch any electrical switches.
• DO NOT use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone.
Follow your gas suppliers instructions.
• If your gas supplier cannot be reached, call the
fire department.
Installation and service must be performed by a
qualified installer, service agency or the gas sup-
plier.
CAREFULLYREVIEWTHEINSTRUCTIONSSUPPLIEDWITH
THE DECORATIVE TYPE UNVENTED ROOM HEATER FOR
THE MINIMUM FIREPLACE SIZE REQUIREMENT.
DO NOT INSTALL THE APPLIANCE IN THIS FIREBOX, UN-
LESS THIS FIREBOX MEETS THE MINIMUM DIMENSIONS
REQUIRED FOR THE INSTALLATIONS.
This is an unvented gas-fired heater. It uses air
(oxygen) from the room in which it is installed.
Provisionsforadequatecombustionandventila-
tion air must be provided. Refer to Combustion
and Ventilation Air Section, Page 3.
Due to high temperatures, the appliance should be located out
of traffic and away from furniture or draperies.
Do not place clothing or other materials on or near this
appliance.
IMPORTANT: READ THESE INSTALLATION INSTRUCTIONS
CAREFULLY BEFORE INSTALLING OR TRYING TO OPERATE
THIS HEATER.
WARNING:IMPROPERINSTALLATION,ADJUSTMENT,AL-
TERATION, SERVICE OR MAINTENANCE CAN CAUSE IN-
JURY OR PROPERTY DAMAGE. REFER TO THIS MANUAL.
FOR ASSISTANCE OR ADDITIONAL INFORMATION CON-
SULT A QUALIFIED INSTALLER, SERVICE AGENCY OR THE
GAS SUPPLIER.
WARNING:IFTHEINFORMATIONINTHISMANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLO-
SIONMAYRESULTCAUSINGPROPERTYDAMAGE,
PERSONAL INJURY OR LOSS OF LIFE.
WARNING: DO NOT BURN WOOD OR OTHER MATERIAL IN
THESE APPLIANCES.
INSTALLATION AND
OPERATING INSTRUCTIONS
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
US

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
2
IMPORTANT SAFETY INFORMATION
INSTALLER:PLEASELEAVETHESEINSTRUC-
TIONS WITH THE OWNER.
OWNER: PLEASE RETAIN THESE INSTRUC-
TION FOR FUTURE REFERENCE.
TABLE OF CONTENTS
General Information......................... page 2
Inventory ......................................... page 2
Tools Required ................................ page 2
Important Safety Information .......... page 2
Codes .............................................. page 3
Combustion and Ventilation Air ....... page 3
Preinstallation.................................. page 4
Clearances ....................................... page 4
Installation....................................... page 6
Gas Pressure Check......................... page 6
Assembling the Logs ....................... page 7
Flame Appearance ........................... page 7
Cleaning and Servicing .................... page 8
Replacement Parts .......................... page 8
Troubleshooting Guide .................... page 9
Operating Instructions..................... page 10
Replacement Parts List.................... page 12
GENERAL INFORMATION
These See-Through Unvented Gas Log Room
Heatersincorporateunitizedceramicfiberlogs
which glow realistically when the heater is
operating.
These log heaters are either thermostatic
(T-stat) or manually controlled. The control
knob is set to the desired position, which
maintains a continuous gas burning rate.
Asparkignitionsystem(piezo) allowsthegas
pilot to be lit without the use of matches or
batteries and permits operation of the heater
during a power outage.
These heaters are fitted with a specially de-
signedpilotutilizingan oxygendepletionsen-
sor (ODS) which responds to the amount of
oxygen available in the room and shuts the
heateroffbeforetheoxygenleveldropsbelow
18%.
UNVENTED SEE-THROUGH GAS LOG ROOM HEATER TECHNICAL CHART
BTU/HR Regulator Gas Inlet Valve
Model No. High Gas Type Ignition Pres. Setting Pressure Operation
VFST-27VSN 34,000 Natural Piezo 5" w.c. Max. 10.5" w.c. Manual (Millvolt)
Min. 6" w.c.
VFST-27VSP 34,000 Propane/LPG Piezo 10" w.c. Max. 13" w.c. Manual (Millvolt)
Min. 11" w.c.
Note: Testgageconnectionsareprovidedonthefrontofthegascontrolvalve(identifiedAforthemanifoldsideandEforinletpressure).
The pilot can be relit only when fresh air is
available.RefertotheCombustionandVentila-
tion Air section.
WARNING:ANY CHANGE TOTHISROOM
HEATERORITSCONTROLSCANBEDAN-
GEROUS.IMPROPER INSTALLATIONOR
USE OF THIS HEATER CAN CAUSE SERI-
OUS INJURY OR DEATH FROM FIRE,
BURNS, EXPLOSION OR CARBON MON-
OXIDE POISONING.
WARNING:THISAPPLIANCE IS FOR IN-
STALLATION IN A SOLID FUEL BURN-
INGFIREPLACEWITHAWORKINGFLUE
OR AN APPROVED VENTLESS FIREBOX
ENCLOSURE ONLY.
Minimum Fireplace (Firebox) Size
Height Depth Width
16" 18" 28" Front
Table 1
Do not install these See-Through Unvented
Gas Log Room Heaters in a bedroom or a
bathroom as all units exceed maximum al-
lowable BTU/hr input of 10,000.
Checktheinventorylisttobesurethatyouhave
allthenecessarypartsinusablecondition.Also
check for concealed damage.
WARNING: FAILURE TO INSTALL THESE
LOGS EXACTLY AS DETAILED IN THIS
INSTRUCTIONMANUALMAY RESULT IN
SOOTING AND MAY RESULT IN VOIDING
PRODUCT WARRANTIES.
Inventory
Unvented gas log room heater
Bag of decorative volcanic rock
Ceramic fiber logs
Installation and Operating Instructions
Tools and Supplies Normally Required
Externalregulator(Propanemodelsonly)
Manual shut-off valve
Sediment trap
Piping complying with local codes
Pipe compound
Pipe wrench
Tee joint
Screwdriver
Carbon Monoxide Poisoning: Early signs of
carbonmonoxidepoisoningaresimilartothe
fluwithheadaches,dizzinessand/ornausea.
If you have these signs, obtain fresh air im-
mediately. Have the Unvented Gas Heater
servicedasitmay notbeoperatingcorrectly.
•Duetohightemperatures,theheatershould
belocatedoutoftrafficandawayfromfurniture
and draperies.
•Children and adults should be alerted to the
hazardofhighsurfacetemperatureandshould
stay away to avoid burns or clothing ignition.
•Young children should be carefully super-
visedwhen they arein thesame room withthe
heater.
•Do not place clothing or other flammable
material on or near the heater.
•Any safety screen or guard removed for
servicing the heater must be replaced prior to
operating the heater.
•Installation and repair should be done by a
qualified service person. The heater should be
inspected before use and at least annually by a
professionalserviceperson.Morefrequentclean-
ing may be required due to excessive lint from
carpeting, bedding material, etc. It is important
thatcontrolcompartments,burnersandcirculat-
ing air passageways of the heater be kept clean.

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE. 3
The National Fuel Gas Code defines a confined
space as a space whose volume is less than
50 ft 3per1,000 BTU/Hr(4.8 m3perkw) of the
aggregate input rating of all appliances in-
stalled in that space and an unconfined space
asaspacewhosevolumeisnotlessthan50ft 3
per1,000BTU/Hr(4.8 m3perkw)oftheaggre-
gate input rating of all appliances installed in
thatspace.Roomscommunicatingdirectlywith
thespaceinwhichtheappliancesareinstalled,
throughopeningsnotfurnishedwithdoors,are
considered a part of the unconfined space.
Unusuallytightconstructionisdefined ascon-
struction where:
a. wall and ceilings exposed to the outside
atmosphere have a continuous water vapor
retarder with a rating or one perm or less with
openings gasketed or sealed, and
b. weather stripping has been added on oper-
able windows and doors, and
c.caulkingorsealantsareappliedtoareassuch
as joints around window and door frames,
between sole plates and floors, between wall-
ceiling joints, between wall panels, at penetra-
tions for plumbing, electrical, and gas lines,
and at other openings.
Usethefollowingequationstodetermineifyou
have a confined or unconfined space.
1.Determine the volume of space — ft 3.
Length x Width x Height = _____ ft 3
(Includeadjoiningroomswithdoorlesspas-
sageways or ventilation grills between
rooms.)
Example:24'(L)x16'(W)x8'(H)=3072ft 3
2.Divide the volume of space by 50 ft 3to
determine the maximum BTU/Hr the space
can support.
______ (volume of space – ft 3)/ 50 ft 3=
(Maximum BTU/Hr the space can support)
Example: 3072 ft 3/ 50 ft 3= 61.44
or 61,440 BTU/Hr the space can support.
3.Add the BTU/Hr of all the fuel burning appli-
ances in the space.
Vent-Free heater _______ BTU/Hr
Gas appliance #1* _______ BTU/Hr
Gas appliance #2 + _______ BTU/Hr
Total = _______ BTU/Hr
Massachusetts And New York Require-
ments
Theseappliancesareapprovedforinstallation
in the following USA locations listed in the
following:
Massachusetts:
These fireplaces are approved for installation
intheUS state ofMassachusettsif thefollow-
ing additional requirements are met-
• Installation and repair must be done by a
plumberorgasfitterlicensedintheCommon-
wealth of Massachusetts.
•Theflexiblegaslineconnectorusedshallnot
exceed 36 inches (92 centimeters) in length.
• The individual manual shut-off must be a T-
handle type valve.
•Vent-FreeappliancesmayNOTbeinstalledin
bedrooms or bathrooms.
• A working smoke detector must be installed
in the area where vent-free appliances are
installed.
Seller of unvented propane or natural gas-
fired supplemental room heaters shall pro-
videtoeachpurchaseracopyof527CMR30
upon sale of the unit.
New York:
These fireplaces are approved for installation
in the US state of New York, but not in New
York city.
Stateorlocalcodesmayonlyallowoperationof
thisappliance(manualversiononly)inavented
configuration. Check your state or local codes.
Superior Unvented Gas Log Room Heaters are
certified by OMNI to ANSI Z21.11.2 standard.
These gas log room heaters may be used as a
spaceheatsourceforaroominconjunctionwith
an approved unvented firebox. Additionally,
manuallycontrolledunitsaredesigncertifiedby
OMNI to ANSI 21.60 as a vented gas log set.
COMBUSTION AND VENTILATION AIR
These heaters shall not be installed in a con-
fined space. The heater may be located in
unusually tight construction provided the
space is unconfined, or if confined, is pro-
videdwithtwopermanent openingscommu-
nicating directly with an additional room(s)
of sufficient volume so that the combined
volume of all connected spaces meets the
criteria for an unconfined space, (National
Fuel Gas Code ANSI Z223.1 (latest edition),
Section5.3). Generally 50ft 3per1,000 BTU
inputofalloperatingappliancesinthespace.
•Allow the heater to cool before servicing.
Always shut off the gas to the heater while
performing service work.
•Do not install the heater in a bedroom or
bathroom.
•The installation must conform with local
codesor,intheabsenceoflocalcodeswiththe
National Fuel Gas Code, ANSI Z223.1.
•The heater and its individual shut-off valve
must be disconnected from the gas supply
pipingsystemwhileperforminganytestsofthe
gas supply piping system at pressures in ex-
cess of 1/2 psig.
•The heater must be isolated from the gas
supply piping system by closing its individual
manualshut-offvalveduringanypressuretest-
ing of the gas supply piping system at test
pressures equal to or less than 1/2 psig.
•Keep heater area clear and free from com-
bustible materials, gasoline and other flam-
mable vapors and liquids.
•Do not use this heater if any part has been
under water. Immediately call a qualified ser-
vice technician to inspect the room heater and
to replace any part of the control system and
any gas control which has been under water.
•InputratingsareshowninBTUperhourand
areforelevationsupto4,800feet.Donotinstall
thisheateratanelevationabove4,800feetifthe
gassupplyhasnot been deratedforthateleva-
tion. Consult your local gas supplier. (For op-
eration at elevations above 4,800 feet, equip-
ment ratings shall be reduced at the rate of 4
percent for each 1,000 feet above sea level
beforeselectingappropriatelysizedequipment.)
•Ensurethat theheater isclean whenoperat-
ing.Excessivedustaccumulationontheburner
and/orlogs willincrease theamount ofcarbon
monoxide formation and could lead to carbon
monoxide poisoning and/or death.
•DONOTinstallthisheaterintoasingle(front)
openingfireplace. Thisheater isdesignedto be
usedinsee-through(multi-open)fireplacesonly.
CODES
Adheretoalllocalcodesorintheirabsencethe
latest edition of The National Fuel Gas Code
ANSIZ223.1orNFPA54whichcanbeobtained
from The American National Standards Insti-
tute, Inc. (1430 Broadway, New York, NY,
10018)orNationalFireProtectionAssociation,
Inc.(Batterymarch Park,Quincy, MA, 02269).

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
4
16"
Min.
42"
Min.
Figure 1
Step2.CeilingClearance:Theceilingmustbe
at least 42" from the top of the heater opening
( Figure 1 ).
Example:
VFST heater 34,000 BTU/Hr
Gas appliance #1 35,000 BTU/Hr
(water heater) Total = 69,000 BTU/Hr
*Do notinclude direct-ventgas appliances.
Direct-ventissealed combustionanddraws
combustion air from the outdoors.
4. Compare the maximum BTU/Hr the space
can support with the actual amount of BTU/
Hr used.
_________ BTU/Hr
(max. the space can support)
_________ BTU/Hr
(actualamountofBTU/Hrused)
Example:
61,440 BTU/Hr
(max. the space can support)
69,000 BTU/Hr
(actualamountofBTU/Hrused)
Thespaceinthepreviousexampleisaconfined
spacebecause theactual BTU/Hrused ismore
than the maximum BTU/Hr the space can sup-
port. You must provide additional fresh air.
Your options are:
a.Rework equations adding the space of ad-
joiningroom(s).Iftheextravolumeprovides
an unconfined space, then remove door or
add ventilation grills between rooms. Refer
to National Fuel Gas Code, ANSI Z223.1
1992, Section 5.3.
b.Vent room directly to the outdoors. Refer to
National Fuel Gas Code, ANSI Z223.1 1992,
Section 5.3.
If the actual BTU/Hr used is less than the
maximumBTU/Hr thespace cansupport, then
thespaceisanunconfinedspace.Youwillneed
noadditionalfreshairventilationforanuncon-
fined space.
WARNING: IF THE AREA IN WHICH THE
HEATERMAYBEOPERATEDISSMALLER
THAN THAT DEFINED AS AN UNCON-
FINED SPACE, PROVIDE ADEQUATE
COMBUSTIONANDVENTILATIONAIRBY
ONE OF THE METHODS DESCRIBED IN
THE NATIONAL FUEL GAS CODE, ANSI
Z223.1 1992, SECTION 5.3 OR APPLI-
CABLE LOCAL CODES.
PREINSTALLATION
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.
Note:Illustrationsshowninthismanualreflect
“typical”installationswithnominaldimensions
and are for reference only. Actual installations
mayvaryduetoindividual designpreferences.
However,alwaysmaintainminimumclearances
tocombustiblematerialsanddonotviolateany
specificinstallationrequirements.RefertoFig-
ures 1 through 7 for clearances.
Note:Thefollowingstepsrepresentthenormal
sequence of installation. Each installation is
unique,however, and might require adifferent
sequence.
Whenlocalcodesrequirethedampertobefixed
open,adamperstopmustbeinstalledtoprevent
full closure of the fireplace damper and provide
a minimum 29 square inch flue opening at all
times. Refer to accessories for damper clamp.
If damper clamp is not available, the damper
may be fixed open in the following manner.
Drill a hole in the end of the damper. Screw in
aboltofsufficientsizeandadjusttoprovidethe
minimum 29 square inches of flue opening.
CAUTION:HEATERSCREATEWARMAIRCUR-
RENTS. THESE CURRENTS MOVE HEAT TO
WALLSURFACESNEXTTOHEATER.INSTALL-
INGHEATERNEXTTOVINYLORCLOTHWALL
COVERINGSOROPERATINGHEATERWHERE
IMPURITIES IN THE AIR (SUCH AS TOBACCO
SMOKE) EXISTS, MAY DISCOLOR WALLS.
Step 1. Turn off gas supply to the fireplace or
firebox.
Step2.Installandsecureheater infireplaceor
firebox.
Step 3. Connect gas line.
Step 4. Assemble logs and test flame.
Step 5. Sprinkle volcanic rock over base plate
in front of and below the main burner.
Check Gas Type
This heater can only be connected to the gas
type specified on the heater rating plate. This
heater can not be modified in the field for a
differentgastype.Ifthegassupplydiffers,DO
NOTINSTALLtheheater.Contactyourdealerto
obtain the correct heater.
CLEARANCES
WARNING: DO NOT INSTALL THIS GAS
HEATER:
• IN SLEEPING QUARTERS, BATH-
ROOMS, A MOBILE HOME, OR A REC-
REATIONAL VEHICLE.
• WHERE CURTAINS, FURNITURE,
CLOTHINGOROTHERFLAMMABLEOB-
JECTS ARE LESS THAN 42" FROM THE
FRONT OF THE GAS HEATER.
• IN HIGH TRAFFIC AREAS.
• IN WINDY OR DRAFTY AREAS.
Ensure the minimum clearances shown in
Figures 1 through 7 are maintained. Left and
right clearances are determined when facing
the front of the heater.
Follow these instructions carefully to ensure
safeinstallation.Failuretofollowtheserequire-
ments may create a fire hazard.
Step 1. Sidewall Clearances: Thesides ofthe
fireplaceopeningmustbeatleast16"fromany
combustible side wall ( Figure 1 ).

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE. 5
Noncombustible Material Requirements with No Mantel Installed
(A) Noncombustible Material Measurement Requirements for Safe Installation
12" or more Adjustable canopy not required.
8" minimum to 12" Install adjustable canopy, P/N 053751 or
P/N 053752 (
Figure 3 ).
Less than 8" Extend noncombustible material to at least
8" and install adjustable canopy ( Figure 3 ).
or
Extend noncombustible material to a height
of at least 12".
Table 2
Noncombustible Material Heights and Mantel Location
Requirements for Safe Installation
with Wood Mantel, Shelf or
Noncombustible Material Measurement Other Combustible Projection
12" or more Adjustablecanopynotrequired.Observepro-
files shown in
Figure 4 .
8" minimum to 12" Install adjustable canopy and observe pro-
files shown in
Figure 5 .
or
Extend heat resistant material to at least 12"
and observe profiles shown in
Figure 4 .
Table 3
8" or More of
Noncombustible
Material
Heater in Fireplace
or Firebox
Adjustable
Canopy
Step 4. Wood mantel, shelf or combustible
projection requirements: To install a wood
mantel, shelf or other combustible projection
directly above the fireplace (firebox), refer to
Table 3 and to Figures 4 and 5 for installation
profiles.
Ifyourmantelprofileisunsafe,youmayeither:
•Raisethemanteltoanacceptableheight,or
•Remove the mantel.
Figure 5
Step 5. Floor clearance: If combustible floor-
ingmaterials,such ascarpetingorasphalt tile,
are to be located within 14" of the fireplace or
nireboxopening,theroomheaterbasemustbe
at least 5" above the combustible flooring ma-
terial ( Figure 6 ).
Top Of Firebox Opening
(Both Sides Of Opening)
14-1/2"
18-5/8"
22-1/2"26"
10"
2-1/2"
6"
8"
12"
8"
Min.
Hood (Canopy)
Heat Resistant
Material
Combustible
Material
5" Min.
Combustible
Material
Figure 4
Heat Resistant
Material 12"
28"
34-1/2"
38-5/8"
42"
10"
2-1/2"
6"
8" Ceiling
Top Of Firebox Opening
(Both Sides Of Opening)
Example:Thebottomofthemantelmayproject
from the wall a maximum of 2-1/2 at a mini-
mum of 8" above the opening. The top shelf of
the mantel may project a maximum of 6" at a
minimum of 14-1/2" above the opening.
Example:Thebottomofthemantelmayproject
from the wall a maximum of 2-1/2" at a mini-
mumof28"abovetheopening.Thetopshelfof
the mantel may project a maximum of 6" at a
minimum of 34-1/2" above the opening.
Figure 3
Step3.Noncombustiblematerials(minimum
requirements):Toinstalltheroomheaterwith-
out wood mantels, shelves or other combus-
tible projections directly above the opening of
the fireplace (firebox) refer to Figure 2 and
Table2. Notethatatleast8"ofnoncombustible
material must be installed above the heaters
described in this manual.
Noncombustible materials, such as slate and
marble, must be at least ¹⁄₂" thick.
Figure 2
Noncombustible
Material
A
Heater in Fireplace
or Firebox
Figure 6

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
6
Checking Gas Connections
Secure all joints tightly using appropriate
toolsandsealingcompounds(ensurepro-
pane resistant compounds are used in
propane applications).
Turn on gas supply and test for gas leaks,
usinga gas leaktest solution (alsoreferred to
as bubble leak solution).
Note: Usingasoapywatersolution(50%dish
soap, 50% water) is an effective leak test
solution but it is not recommended, because
the soap residue that is left on the pipes/
fittingscanresultincorrosionovertime. Never
use an open flame to check for leaks.
A. Light the appliance (refer to safety and
lighting instructions on pages 12 and 14.
B. Brush all joints and connections with the
gas leak test solution to check for leaks. If
bubbles are formed, or gas odor is detected,
turn the gas control knob to the “OFF” posi-
tion. Either tighten or refasten the leaking
connection and retest as described above.
C.Whenthegaslinesare tested andleakfree,
be sure to rinse off the leak testing solution.
D.Whenthegaslinesaretestedandleakfree,
observetheindividualtonguesofflameonthe
burner. Make sure all ports are open and
producing flame evenly across the burner. If
any ports are blocked, or partially blocked,
clean out the ports.
Gas Pressure Check
Check inlet gas pressure to ensure it is within
thelimitsspecifiedinthechartonpage2. Test
gage connections are provided on the front of
thegascontrolvalve(identifiedAforthemani-
fold and E for inlet pressure.
Figure 8
The pressure should be checked with the gas
heater burning and the control set to high (3).
Replace the test point plugs after pressure
measurement ensuring no gas leaks.
Gas Valve (Pressure
Test Points Located
On Front)
A qualified gas appliance installer must install
this heater.
Check gas type: The gas supply must be the
sameasstatedontheheater’sratingplate.If
the gas supply is different, DO NOT INSTALL
theheater.Contactyourdealerforthecorrect
model.
Step 1. Placement of the Heater – Center the
heaterin the fireplaceor firebox. Make certain
the grate front feet sit inside the front edge of
the fireplace or firebox clear of any operating
screens.
Step 2. Connecting Gas Line – Aqualified gas
applianceinstallermustconnect thegasroom
heater to the gas supply.
Consult all local codes.
Route gas line using techniques and materials
prescribedbylocaland/ornationalcodes. Only
use gas line of ¹⁄₂" or greater diameter to allow
full gas volume to the gas fireplace. Undue
pressurelosswilloccurifthepipeistoosmall.
When rigid pipe is used, an ANSI approved
manual shut-off valve and union must be in-
stalled upstream of the heater within the fire-
place cavity.
Ensure that a sediment trap is installed in the
existing gas line, if not, install a sediment trap
upstream of the heater to prevent moisture and
contaminants from passing through trap to the
heater controls and burners. Failure to do so
couldpreventtheheaterfromoperatingreliably.
An external regulator must be used on all pro-
pane(L.P.G.)heaterstoreducethesupplytank
pressure to 13" w.c. (maximum). Any copper
tubing used to supply propane (L.P.G.) from
the tank must be internally tinned.
IMPORTANT: HOLD HEATER VALVE SE-
CURELY TO PREVENT MOVEMENT WHEN
CONNECTING TO INLET GAS LINE
WARNING: CONNECTING DIRECTLY TO
AN UNREGULATED PROPANE (L.P.G.)
TANK MAY CAUSE AN EXPLOSION.
The heater gas inlet connection is ³⁄₈" NPT at
theregulator,madeontherightsidefacingthe
heater.Ifaleftsidegaslineisrequired,thegas
line may be led under the rear of the heater to
endattherighthandsideforconnectiontothe
inlet. However, this method is not recom-
mended. For an easier connection to the
UnventedGas LogRoomHeaters, connection
fittings have been supplied with the firebox.
Cut and flare tubing to fit.
The room heater base may be lower than 5"
above the combustible flooring materials if
the combustible flooring materials are more
than14"fromthefireplaceorfireboxopening
(
Figure 7 ).
Figure 7
Combustible
Material
Can be less
than 5"
14" Min.
(Both Sides Of Opening)
INSTALLATION
WARNING: DO NOT ALLOW FANS TO
BLOW DIRECTLY INTO THE FIREPLACE.
AVOID ANY DRAFTS THAT ALTER
BURNER FLAME PATTERNS.
WARNING: DO NOT USE A BLOWER IN-
SERT, HEAT EXCHANGER INSERT OR
OTHER ACCESSORY NOT APPROVED
FOR USE WITH THIS HEATER.
This appliance must not be operated without a
fireplace screen installed. Fireplace screens
mustnotimpairthefreeflowofcombustionair
to the appliance.
Donotburnsolidfuelsinanyfireplaceequipped
with this listed unvented gas room heater.
Installeddecorativeglassdoorenclosuresmust
be fully opened when operating this listed un-
vented gas room heater.
Anyoutsideairductsand/orashdumpsthatare
part of the original solid fuel burning fireplace
system must be fully closed and sealed at the
time of installation of this listed unvented gas
room heater.
WARNING: SPECIAL CARE IS REQUIRED
IF YOU ARE INSTALLING THE UNIT INTO
ASUNKENFIREPLACE.YOUMUSTRAISE
THE FIREPLACE FLOOR TO ALLOW AC-
CESSTOGASLOGCONTROLS.THISWILL
INSURE ADEQUATE AIR FLOW AND
GUARD AGAINST SOOTING. RAISE THE
FIREPLACEFLOORUSINGNONCOMBUS-
TIBLE MATERIALS.

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE. 7
An incorrect pilot flame pattern is shown in
Figure 11 . This pilot flame will cause the
thermocoupletocool. Whenthethermocouple
cools, the log set will shut off. If pilot flame
pattern is incorrect, or if log set shuts off,
contact your service representative.
Figure 11
In normal operation, at full rate, after 15 min-
utesthe followingflameappearance shouldbe
observed:
Burner Flame Characteristics – The flames
should be yellow. The flames should extend
about3–4"abovethelogsfornaturalgasand
2 – 3" above for propane (L.P.G.) gas ( Figure
12 ).
Figure 12
Note: Propane Model Shown
Figure 9
PILOT CUT OUT
Step 3. Assembling the Logs
WARNING:DONOTADDEXTRALOGSOR
ORNAMENTSSUCHASPINECONES,VER-
MICULITEORROCKWOOL.USINGTHESE
ADDED ITEMS CAN CAUSE SOOTING.
WARNING: DO NOT PLACE ANY LAVA
ROCKONLOGSORBURNERS.THISMAY
CAUSE SOOTING. ONLY PLACE LAVA
ROCK ON FLOOR OF FIREPLACE.
The heater includes a unitized set of eight
ceramic fiber logs. The heater and logs are
assembledasshownin Figure9 . Handlethese
logs with great care. The logs can be easily
damaged, but when handled properly they can
provide years of performance and enjoyment.
WARNING: FAILURE TO POSITION THE
PARTS IN ACCORDANCE WITH THESE
DIAGRAMS OR FAILURE TO USE ONLY
PARTS SPECIFICALLY APPROVED WITH
THIS HEATER MAY RESULT IN PROP-
ERTY DAMAGE OR PERSONAL INJURY.
Periodically check the positioning of all logs.
Flame Appearance
REFER TO THE OPERATING INSTRUCTIONS
LOCATED AT THE BACK OF THIS MANUAL
BEFORELIGHTINGTHEHEATERTOOBSERVE
THE FLAMES.
Flames from the pilot, front and rear burner
should be visually checked as soon as the
heater is installed. In addition a periodic visual
check of the flames should be made. The pilot
flameshouldalwaysbepresentwhentheheater
is in operation ( Figure 10 ).
WARNING: NO ADJUSTMENTS ARE TO
BE MADE TO THE ODS PILOT SYSTEM.
TAMPERING WITH THIS SYSTEM CAN
BE EXTREMELY HAZARDOUS.
Figure 10

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
8
ACCESSORIES
Decorative
Volcanic Stone VFVS
Brass AC - SPB
Black AC - BLK
Adjustable Canopy
Damper Clamp DCK
REPLACEMENT PARTS
An exploded view of the room heater with
numberedpartsandapartslistcanbefoundon
page 16. All parts should be ordered through
yourLennox distributor ordealer. Partswillbe
shipped at prevailing prices at time of order.
When ordering repair parts, always give the
following information:
1. The model number of the heater.
2. The serial number of the heater.
3. The part number.
4. The description of the part.
5. The quantity required.
6. The installation date of the heater.
If you encounter any problems or have any
questions concerning the installation of this
heater,please contact yourdistributor. For the
name of your nearest distributor contact:
LHP
1110 West Taft Avenue
Orange, CA 92865
CLEANAING AND SERVICING
WARNING: TURN OFF THE UNVENTED
GASROOMHEATERANDALLOWTOCOOL
BEFORE CLEANING.
CAUTION: YOU MUST KEEP CONTROL AR-
EAS,BURNERSANDCIRCULATINGAIRPAS-
SAGEWAYSOFFIREPLACECLEAN. INSPECT
THESE AREAS OF FIREPLACE BEFORE EACH
USE. HAVE FIREPLACE AND CHIMNEY (IF
APPLICABLE) INSPECTED YEARLY BY A
QUALIFIED SERVICE PERSON. FIREPLACE
MAYNEEDMOREFREQUENTCLEANINGDUE
TOEXCESSIVELINTFORMCARPETING,BED-
DING MATERIAL, ETC.
Only limited cleaning will be required under the
normaluseoftheheater.Dustthefrontgrate,the
top of the piezo cover and the control knob
occasionally.Donotusecleaningfluidstoclean
the logs or any other part of the room heater.
Remove the logs, gently handling at each end.
Useavacuumcleanertoremovelooseparticles
from the base and from around the burners.
Glovesare recommended toprevent the fibers
from pricking your skin. If the skin is pricked,
wash gently with soap and water. Replace the
logsasdetailedinStep3AssemblingtheLogs.
If, after a period of use, the flames start to
exhibit unusual shapes and behavior, or the
burnersfailtoignitesmoothly, thentheburner
holes may require some cleaning. If this hap-
pens, it is preferable to contact your nearest
dealer to get the appliance serviced.

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE. 9
1. When igniter button is
pressed, there is no spark
at ODS/pilot.
2. Heater produces unwanted
odors.
3. Heater shuts off in use
(ODS operates).
4. Gas odor even when control
knob is in “OFF” position.
5. When igniter button is
pressed, there is spark at
ODS/pilot, but no ignition.
6. ODS/pilot lights, but flame
goes out when control knob
is released.
7. Burner does not light after
ODS/pilot is lit.
8. Delayed ignition of burner.
9. Burner backfiring during
combustion.
10. Slight smoke or odor during
initial operation.
11. Heater produces a whistling
noise when burner is lit.
Replace igniter.
Replace igniter.
Reconnect igniter cable.
Free igniter cable if pinched by any metal or tubing. Keep igniter cable dry.
Tighten nut.
Replace igniter cable.
Replace piezo igniter.
Ventilate room. Stop using odor-causing products while fireplace is running.
Locate and correct all leaks.
Open window and/or door for ventilation.
Contact local gas company.
Clean ODS/pilot.
Locate and correct all leaks (see Checking Gas Connections, page 7).
Replace control valve.
Turn on gas supply or open manual shut-off valve.
Turn control knob to pilot position.
Press in control knob while in pilot position.
Continue holding down control knob. Repeat igniting operation until air is
removed.
Replace ODS/pilot assembly or get it serviced.
Replace gas regulator.
Press in control knob fully.
After ODS/pilot lights, keep control knob pressed in 30 seconds.
Fully open manual shut-off valve.
Hand tighten until snug, then tighten ¹⁄₄ turn more.
1). Contact local gas company.
2). Replace ODS/pilot assembly or get pilot serviced.
Replace thermocouple.
Replace control valve.
Clean burner or replace burner orifice.
Replace burner orifice.
Contact local gas company.
Contact local gas company.
Clean burner or replace burner orifice.
Clean burner or replace burner orifice.
Replace burner.
Replace gas regulator.
Problemwillstopafterafewhoursofoperation.SFC recommendsrunningthe
heater with excess ventilation for the first few hours.
Turn control knob to “LO” position and let warm up for a minute.
Operateburneruntilairisremovedfromline.Havegaslinecheckedbylocalgas
company.
Clean burner or replace burner orifice.
A. Igniter electrode positioned wrong.
B. Igniter electrode broken.
C. Igniter electrode not connected to igniter cable.
D. Igniter cable pinched or wet.
E. Piezo igniter nut is loose.
F. Broken igniter cable.
G. Bad piezo igniter.
A. Heater burning vapors from paint, hair spray, glues, etc.
B. Gas leak. See Warning statement on the front page.
A. Not enough fresh air is available.
B. Low line pressure.
C. ODS/pilot is partially clogged.
A. Gas leak. See Warning statement on the front page.
B. Control valve defective.
A. Gas supply turned off or manual shut-off valve closed.
B. Control knob not in “PILOT” position.
C. Control knob not pressed in while in “PILOT” position.
D. Air in gas lines when installed.
E. ODS/pilot is clogged.
F. Gas regulator setting is not correct.
A. Control knob not fully pressed in.
B. Control knob not pressed in long enough.
C. Manual shut-off valve not fully open.
D. Thermocouple connection loose at control valve.
E. Pilot flame not touching thermocouple, which allows
thermocouple to cool, causing pilot flame to go out. This
problem could be caused by one or both of the following:
1). Low gas pressure
2). Dirty or partially clogged ODS/pilot
F. Thermocouple damaged.
G. Control valve damaged.
A. Burner orifice is clogged.
B. Burner orifice diameter is too small.
C. Inlet gas pressure is too low.
A. Manifold pressure is too low.
B. Burner orifice is clogged.
A. Burner orifice is clogged or damaged.
B. Burner damaged.
C. Gas regulator defective.
A. Vapors from paint or curing process of logs.
A. Turning control knob to “HI” position when burner is cold.
B. Air in gas line.
C. Dirty or partially clogged burner orifice.
OBSERVED PROBLEM POSSIBLE CAUSE REMEDY
TROUBLESHOOTING GUIDE FOR UNVENTED GAS PRODUCTS

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
10
OPERATING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE LIGHTING
LIGHTING INSTRUCTIONS
1. Stop! Read the safety information above.
2. Make sure manual shut-off valve is fully open.
3. Locate gas control knob and piezo (
Figure 13 ).
4. Depress control knob in and turn clockwise to the
“OFF” position (
Figure 14 ).
5. Wait 5 minutes to clear out any gas. Then smell for gas,
including near the floor. If you smell gas, STOP! Follow “B” in
the safety information above. If you do not smell gas, go to the
next step.
6. The pilot is located on the right side in front of the burner
(
Figure 15 ).
7. Depress control knob in and turn counterclockwise
to the “PILOT” position (
Figure 16 ). Press the control knob all
the way in for 5 seconds.
Note: If you are running the heater for the first time it will be
necessary to press the control knob all the way in for 30
seconds to allow air to bleed out of the gas piping.
MANUAL MATCH LIGHTING PROCEDURE — EMERGENCY ONLY
1. If the pilot cannot be lit with the piezo igniter, the heater can be
manually lit with a match.
2. With the right hand, depress and turn the control knob
counterclockwise to the “ON” position. Hold in the
knob.
TO TURN OFF GAS TO HEATER
1. Depress and turn control knob clockwise to the “OFF”
position ( Figure 18 ).
3. Light the match and hold the flame to the end of the pilot and
ignite the pilot.
4. Continue to hold control knob for an additional 10 seconds to
insure pilot remains lit.
5. Release the control while turning control knob to desired
setting.
8. With the control knob pressed in, push in and release the
piezo igniter button to light the pilot.
9. Hold the control knob in for a further 10 seconds to prevent
the flame failure detector from shutting off the gas while the
probe is warming up.
10. Release the control knob while turning counterclockwise
to the "ON" Position (
Figure 17 ). Then adjust
"HI-LO" knob to prefered setting.
•If the knob does not pop out when released, stop and
immediately call your service technician or gas supplier.
•If the pilot will not stay lit after several tries, depress and
turn the gas control knob clockwise to “OFF”
and wait 30 seconds. Depress and turn knob counter-
clockwise to “ON” and press igniter button
again. If your pilot does not relight depress and turn
control knob clockwise to “OFF” and call your
service technician or gas supplier.
11. Wait 30 seconds before readjusting the heater when the
control knob has been turned down to a lower setting.
•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.
C. Use only your hand to push in or turn the gas control knob.
Never use tools. If the knob will not push in or turn by hand, do
not try to repair it, call a qualified service technician. Forced or
attempted repair may result in a fire or explosion.
D. Do not use this heater 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.
A. This heater has a pilot which must be lit by hand. When
lighting the pilot, follow these instructions exactly.
B. BEFORE OPERATING smell all around the heater area for gas.
Be sure to smell next to the floor because some gas is heavier
than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electric switch; do not use any phone
in your building.
WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION MAY
RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE. 11
Figure 14
Figure 13
Control Knob Locations Pilot Location
Figure 16
Figure 15
Pilot
Figure 17
P
I
L
O
T
O
N
it
O
F
F
P
I
L
O
T
O
N
it
O
F
F
P
I
L
O
T
O
N
it
O
F
F
Note: Knob cannot be turned from “PILOT” to “OFF”
unless the knob is pushed in slightly. Do not force.
Turn Control Knob to “OFF” Position Turn Control Knob to “PILOT” Position
Turn Control Knob to “ON” Position
Piezo Ignitor
Gas Control
Knob Flame Adjustment
Knob

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
12
REPLACEMENT PARTS LIST
VFST-27VSN VFST-27VSP
No. Description Part No. Part No.
1. Valve - Millivolt 903489 901917
2. Pilot Assembly 901914 901915
3. Piezo 111061 111061
4. Piezo Wire 110361 110361
5. Burner 112281 112281
Burner (Valve Side) 112291 112291
6. Burner Orifice (2 Each) 110389 110384
7. Burner Crossover Tube 110321 110321
8. Crossover Tube Orifice 110387 110388
9. Log Set 100110 100110

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE. 13
REPLACEMENT PARTS
2
6
5
9
3
4
1
8
7

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
14 NOTE: THIS PAGE INTENTIONALLY LEFT BLANK.

NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE. 15
NOTE: THIS PAGE INTENTIONALLY LEFT BLANK.

Printed in U.S.A. © 1997 by Lennox Hearth Products
P/N 903588 REV. G 12/2007
The manufacturer reserves the right to make changes at any time, without notice, in design, materials, specifications, prices and also to discontinue colors, styles and products.
Consult your local distributor for fireplace code information. LHP
1110 West Taft Avenue
Orange, CA 92865