INSTALLATION AND
OPERATING INSTRUCTIONS
STANDARD SERIES
Unvented See-Through Gas Log Room Heaters
P/N 903588 REV. G 12/2007
MODELS
VFST-27VSN-2
VFST-27VSP-2
FOR USE ONLY WITH DECORATIVE TYPE UNVENTED ROOM
HEATERS.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
DO NOT BUILD A WOOD FIRE.
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.
US
WARNING: DO NOT BURN WOOD OR OTHER MATERIAL IN
THESE APPLIANCES.
WARNING:IFTHEINFORMATIONINTHISMANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLO-
SIONMAYRESULTCAUSINGPROPERTYDAMAGE,
PERSONAL INJURY OR LOSS OF LIFE.
CAREFULLY REVIEW THE INSTRUCTIONS SUPPLIED WITH
THE DECORATIVE TYPE UNVENTED ROOM HEATER FOR
THE MINIMUM FIREPLACE SIZE REQUIREMENT.
FOR YOUR SAFETY: Do not store or use gasoline
orotherflammablevaporsorliquidsinthevicinity
of this or any other appliance.
DO NOT INSTALL THE APPLIANCE IN THIS FIREBOX, UN-
LESS THIS FIREBOX MEETS THE MINIMUM DIMENSIONS
REQUIRED FOR THE INSTALLATIONS.
FOR YOUR SAFETY: What to do if you smell gas:
This is an unvented gas-fired heater. It uses air
(oxygen) from the room in which it is installed.
Provisions for adequate combustion and ventila-
tion air must be provided. Refer to Combustion
and Ventilation Air Section, Page 3.
• 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.
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.
Installation and service must be performed by a
qualified installer, service agency or the gas sup-
plier.
IMPORTANT: READ THESE INSTALLATION INSTRUCTIONS
CAREFULLY BEFORE INSTALLING OR TRYING TO OPERATE
THIS HEATER.
• Allow the heater to cool before servicing.
Always shut off the gas to the heater while
performing service work.
The National Fuel Gas Code defines a confined
space as a space whose volume is less than
50 ft 3 per 1,000 BTU/Hr (4.8 m3 per kw) of the
aggregate input rating of all appliances in-
stalled in that space and an unconfined space
asaspacewhosevolumeisnotlessthan50ft 3
per 1,000 BTU/Hr (4.8 m3 per kw) of the aggre-
gate input rating of all appliances installed in
thatspace.Roomscommunicatingdirectlywith
the space in which the appliances are installed,
throughopeningsnotfurnishedwithdoors,are
considered a part of the unconfined space.
Massachusetts And New York Require-
ments
These appliances are approved for installation
in the following USA locations listed in the
following:
• Do not install the heater in a bedroom or
bathroom.
Massachusetts:
• The installation must conform with local
codes or, in the absence of local codes with the
National Fuel Gas Code, ANSI Z223.1.
These fireplaces are approved for installation
in the US state of Massachusetts if the follow-
ing additional requirements are met-
• 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.
• Installation and repair must be done by a
plumber or gas fitter licensed in the Common-
wealth of Massachusetts.
Unusually tight construction is defined as con-
struction where:
• The flexible gas line connector used shall not
exceed 36 inches (92 centimeters) in length.
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
• 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.
• The individual manual shut-off must be a T-
handle type valve.
b. weather stripping has been added on oper-
able windows and doors, and
•Vent-FreeappliancesmayNOTbeinstalledin
bedrooms or bathrooms.
• Keep heater area clear and free from com-
bustible materials, gasoline and other flam-
mable vapors and liquids.
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.
• A working smoke detector must be installed
in the area where vent-free appliances are
installed.
• 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.
Seller of unvented propane or natural gas-
fired supplemental room heaters shall pro-
vide to each purchaser a copy of 527 CMR 30
upon sale of the unit.
Usethefollowingequationstodetermineifyou
have a confined or unconfined space.
• Input ratings are shown in BTU per hour and
areforelevationsupto4,800feet.Donotinstall
thisheateratanelevationabove4,800feetifthe
gas supply has not been derated for that eleva-
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.)
New York:
1. Determine the volume of space — ft 3.
These fireplaces are approved for installation
in the US state of New York, but not in New
York city.
Length x Width x Height = _____ ft 3
(Includeadjoiningroomswithdoorlesspas-
sageways or ventilation grills between
rooms.)
State or local codes may only allow operation of
this appliance (manual version only) in a vented
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,
manually controlled units are design certified by
OMNI to ANSI 21.60 as a vented gas log set.
Example:24' (L)x16' (W)x8' (H)=3072ft 3
• Ensure that the heater is clean when operat-
ing.Excessivedustaccumulationontheburner
and/or logs will increase the amount of carbon
monoxide formation and could lead to carbon
monoxide poisoning and/or death.
2. Divide the volume of space by 50 ft 3 to
determine the maximum BTU/Hr the space
can support.
______ (volume of space – ft 3)/ 50 ft 3
=
(Maximum BTU/Hr the space can support)
• DO NOT install this heater into a single (front)
opening fireplace. This heater is designed to be
usedinsee-through(multi-open)fireplacesonly.
COMBUSTION AND VENTILATION AIR
Example: 3072 ft 3 / 50 ft 3 = 61.44
or 61,440 BTU/Hr the space can support.
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-
vided with two permanent openings commu-
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),
Section 5.3). Generally 50 ft 3 per 1,000 BTU
input of all operating appliances in the space.
3. Add the BTU/Hr of all the fuel burning appli-
ances in the space.
CODES
Adhere to all local codes or in their absence the
latest edition of The National Fuel Gas Code
ANSI Z223.1 or NFPA54 which can be obtained
from The American National Standards Insti-
tute, Inc. (1430 Broadway, New York, NY,
10018)orNationalFireProtectionAssociation,
Inc. (Batterymarch Park, Quincy, MA, 02269).
Vent-Free heater
Gas appliance #1*
Gas appliance #2
_______ BTU/Hr
_______ BTU/Hr
+ _______ BTU/Hr
Total = _______ BTU/Hr
3
Example:
PREINSTALLATION
Check Gas Type
VFST heater
Gas appliance #1
(water heater)
34,000 BTU/Hr
35,000 BTU/Hr
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.
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.
Total = 69,000 BTU/Hr
* Do not include direct-vent gas appliances.
Direct-vent is sealed combustion and draws
combustion air from the outdoors.
CLEARANCES
4. Compare the maximum BTU/Hr the space
can support with the actual amount of BTU/
Hr used.
Note: Illustrations shown in this manual reflect
“typical” installationswithnominaldimensions
and are for reference only. Actual installations
may vary due to individual design preferences.
However,alwaysmaintainminimumclearances
tocombustiblematerialsanddonotviolateany
specific installation requirements. Refer to Fig-
ures 1 through 7 for 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.
_________ 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
Note:Thefollowingstepsrepresentthenormal
sequence of installation. Each installation is
unique, however, and might require a different
sequence.
• IN HIGH TRAFFIC AREAS.
• IN WINDY OR DRAFTY AREAS.
(actualamountofBTU/Hrused)
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.
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.
Thespaceinthepreviousexampleisaconfined
space because the actual BTU/Hr used is more
than the maximum BTU/Hr the space can sup-
port. You must provide additional fresh air.
Follow these instructions carefully to ensure
safeinstallation.Failuretofollowtheserequire-
ments may create a fire hazard.
Your options are:
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.
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.
Step 1. Sidewall Clearances: The sides of the
fireplace opening must be at least 16" from any
combustible side wall (Figure 1 ).
CAUTION:HEATERSCREATEWARMAIRCUR-
RENTS. THESE CURRENTS MOVE HEAT TO
WALLSURFACESNEXTTOHEATER. INSTALL-
INGHEATERNEXTTOVINYLORCLOTHWALL
COVERINGS OR OPERATING HEATER WHERE
IMPURITIES IN THE AIR (SUCH AS TOBACCO
SMOKE) EXISTS, MAY DISCOLOR WALLS.
b. Vent room directly to the outdoors. Refer to
National Fuel Gas Code, ANSI Z223.1 1992,
Section 5.3.
42"
Min.
If the actual BTU/Hr used is less than the
maximum BTU/Hr the space can support, then
thespaceisanunconfinedspace.Youwillneed
no additional fresh air ventilation for an uncon-
fined space.
16"
Min.
Step 1. Turn off gas supply to the fireplace or
firebox.
Step 2. Install and secure heater in fireplace or
firebox.
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.
Figure 1
Step 3. Connect gas line.
Step2. CeilingClearance:Theceilingmustbe
at least 42" from the top of the heater opening
(Figure 1 ).
Step 4. Assemble logs and test flame.
Step 5. Sprinkle volcanic rock over base plate
in front of and below the main burner.
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
4
Example:Thebottomofthemantelmayproject
from the wall a maximum of 2-1/2" at a mini-
mum of 28" above the opening. The top shelf of
the mantel may project a maximum of 6" at a
minimum of 34-1/2" above the opening.
Noncombustible Material Requirements with No Mantel Installed
(A) Noncombustible Material Measurement
12" or more
Requirements for Safe Installation
Adjustable canopy not required.
8" minimum to 12"
Install adjustable canopy, P/N 053751 or
P/N 053752 (Figure 3 ).
Ceiling
10"
8"
6"
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".
42"
38-5/8"
34-1/2"
2-1/2"
28"
Table 2
Heat Resistant
Material
12"
Noncombustible Material Heights and Mantel Location
Requirements for Safe Installation
with Wood Mantel, Shelf or
Other Combustible Projection
Top Of Firebox Opening
(Both Sides Of Opening)
Noncombustible Material Measurement
Figure 4
12" or more
Adjustablecanopynotrequired.Observepro-
files shown in Figure 4.
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.
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.
12"
10"
8"
Table 3
26"
6"
22-1/2"
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
Table 2. Note that at least 8" of noncombustible
material must be installed above the heaters
described in this manual.
2-1/2"
8" or More of
Noncombustible
Material
18-5/8"
Heat Resistant
Material
14-1/2"
8"
Min.
Adjustable
Canopy
Hood (Canopy)
Top Of Firebox Opening
(Both Sides Of Opening)
Noncombustible materials, such as slate and
marble, must be at least ¹⁄₂" thick.
Figure 5
Heater in Fireplace
or Firebox
Step 5. Floor clearance: If combustible floor-
ing materials, such as carpeting or asphalt tile,
are to be located within 14" of the fireplace or
nireboxopening,theroomheaterbasemustbe
at least 5" above the combustible flooring ma-
terial (Figure 6 ).
Noncombustible
Material
Figure 3
A
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.
Combustible
Material
Combustible
Material
Heater in Fireplace
or Firebox
Ifyourmantelprofileisunsafe, youmayeither:
5" Min.
•
•
Raisethemanteltoanacceptableheight, or
Remove the mantel.
Figure 2
Figure 6
5
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
The room heater base may be lower than 5"
above the combustible flooring materials if
the combustible flooring materials are more
than14"fromthefireplaceor fireboxopening
(Figure 7 ).
A qualified gas appliance installer must install
this heater.
Checking Gas Connections
Secure all joints tightly using appropriate
tools and sealing compounds (ensure pro-
pane resistant compounds are used in
propane applications).
Check gas type: The gas supply must be the
same as stated on the heater’s rating plate. If
the gas supply is different, DO NOT INSTALL
theheater. Contactyourdealerforthecorrect
model.
Combustible
Material
Turn on gas supply and test for gas leaks,
using a gas leak test solution (also referred to
as bubble leak solution).
Can be less
than 5"
Step 1. Placement of the Heater – Center the
heater in the fireplace or firebox. Make certain
the grate front feet sit inside the front edge of
the fireplace or firebox clear of any operating
screens.
Note: Usingasoapywater solution(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.
14" Min.
(Both Sides Of Opening)
Step 2. Connecting Gas Line – A qualified gas
appliance installer must connect the gas room
heater to the gas supply.
Figure 7
INSTALLATION
A. Light the appliance (refer to safety and
lighting instructions on pages 12 and 14.
Consult all local codes.
WARNING: DO NOT ALLOW FANS TO
BLOW DIRECTLY INTO THE FIREPLACE.
AVOID ANY DRAFTS THAT ALTER
BURNER FLAME PATTERNS.
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
pressure loss will occur if the pipe is too small.
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.
WARNING: DO NOT USE A BLOWER IN-
SERT, HEAT EXCHANGER INSERT OR
OTHER ACCESSORY NOT APPROVED
FOR USE WITH THIS HEATER.
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.
C. When the gas lines are tested and leak free,
be sure to rinse off the leak testing solution.
D. When the gas lines are tested and leak free,
observe the individual tongues of flame on the
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.
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.
This appliance must not be operated without a
fireplace screen installed. Fireplace screens
must not impair the free flow of combustion air
to the appliance.
Donotburnsolidfuelsinanyfireplaceequipped
with this listed unvented gas room heater.
Gas Pressure Check
An external regulator must be used on all pro-
pane (L.P.G.) heaters to reduce the supply tank
pressure to 13" w.c. (maximum). Any copper
tubing used to supply propane (L.P.G.) from
the tank must be internally tinned.
Installeddecorativeglassdoorenclosuresmust
be fully opened when operating this listed un-
vented gas room heater.
Check inlet gas pressure to ensure it is within
the limits specified in the chart on page 2. Test
gage connections are provided on the front of
the gas control valve (identified A for the mani-
fold and E for inlet pressure.
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.
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.
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.
Gas Valve (Pressure
Test Points Located
On Front)
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
endat theright handsidefor connectiontothe
inlet. However, this method is not recom-
mended. For an easier connection to the
Unvented Gas Log Room Heaters, connection
fittings have been supplied with the firebox.
Cut and flare tubing to fit.
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.
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
6
Step 3. Assembling the Logs
The heater includes a unitized set of eight
ceramic fiber logs. The heater and logs are
assembled as shown in Figure 9. Handle these
logs with great care. The logs can be easily
damaged, but when handled properly they can
provide years of performance and enjoyment.
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.
WARNING:DONOTADDEXTRALOGSOR
ORNAMENTSSUCHASPINECONES, VER-
MICULITEORROCKWOOL. USINGTHESE
ADDED ITEMS CAN CAUSE SOOTING.
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.
WARNING: DO NOT PLACE ANY LAVA
ROCKONLOGSORBURNERS. THISMAY
CAUSE SOOTING. ONLY PLACE LAVA
ROCK ON FLOOR OF FIREPLACE.
Periodically check the positioning of all logs.
Flame Appearance
REFER TO THE OPERATING INSTRUCTIONS
LOCATED AT THE BACK OF THIS MANUAL
BEFORELIGHTINGTHEHEATERTOOBSERVE
THE FLAMES.
Figure 11
In normal operation, at full rate, after 15 min-
utes the following flame appearance should be
observed:
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 ).
Burner Flame Characteristics – The flames
should be yellow. The flames should extend
about 3 – 4" above the logs for natural gas and
2 – 3" above for propane (L.P.G.) gas (Figure
12 ).
WARNING: NO ADJUSTMENTS ARE TO
BE MADE TO THE ODS PILOT SYSTEM.
TAMPERING WITH THIS SYSTEM CAN
BE EXTREMELY HAZARDOUS.
Note: Propane Model Shown
Figure 12
PILOT
CUT OUT
Figure 10
Figure 9
7
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
CLEANAING AND SERVICING
REPLACEMENT PARTS
ACCESSORIES
An exploded view of the room heater with
numberedpartsandapartslistcanbefoundon
page 16. All parts should be ordered through
your Lennox distributor or dealer. Parts will be
shipped at prevailing prices at time of order.
WARNING: TURN OFF THE UNVENTED
GASROOMHEATERANDALLOWTOCOOL
BEFORE CLEANING.
CAUTION: YOU MUST KEEP CONTROL AR-
EAS, BURNERS AND CIRCULATING AIR PAS-
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.
When ordering repair parts, always give the
following information:
Decorative
Volcanic Stone
VFVS
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.
Only limited cleaning will be required under the
normaluseoftheheater.Dustthefrontgrate,the
top of the piezo cover and the control knob
occasionally. Do not use cleaning fluids to clean
the logs or any other part of the room heater.
If you encounter any problems or have any
questions concerning the installation of this
heater, please contact your distributor. For the
name of your nearest distributor contact:
Adjustable Canopy
Brass
Black
AC - SPB
AC - BLK
LHP
Remove the logs, gently handling at each end.
Useavacuumcleanertoremovelooseparticles
from the base and from around the burners.
Gloves are recommended to prevent the fibers
from pricking your skin. If the skin is pricked,
wash gently with soap and water. Replace the
logs as detailed in Step 3 Assembling the Logs.
1110 West Taft Avenue
Orange, CA 92865
Damper Clamp
DCK
If, after a period of use, the flames start to
exhibit unusual shapes and behavior, or the
burners fail to ignite smoothly, then the burner
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.
8
TROUBLESHOOTING GUIDE FOR UNVENTED GAS PRODUCTS
OBSERVED PROBLEM
POSSIBLE CAUSE
A. Igniter electrode positioned wrong.
B. Igniter electrode broken.
REMEDY
1. When igniter button is
pressed, there is no spark
at ODS/pilot.
Replace igniter.
Replace igniter.
C. Igniter electrode not connected to igniter cable.
D. Igniter cable pinched or wet.
Reconnect igniter cable.
Free igniter cable if pinched by any metal or tubing. Keep igniter cable dry.
Tighten nut.
E. Piezo igniter nut is loose.
F. Broken igniter cable.
Replace igniter cable.
G. Bad piezo igniter.
Replace piezo igniter.
2. Heater produces unwanted
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.
Ventilate room. Stop using odor-causing products while fireplace is running.
Locate and correct all leaks.
odors.
3. Heater shuts off in use
Open window and/or door for ventilation.
Contact local gas company.
(ODS operates).
C. ODS/pilot is partially clogged.
Clean ODS/pilot.
4. Gas odor even when control
A. Gas leak. See Warning statement on the front page.
B. Control valve defective.
Locate and correct all leaks (see Checking Gas Connections, page 7).
Replace control valve.
knob is in “OFF” position.
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.
Turn on gas supply or open manual shut-off valve.
Turn control knob to pilot position.
5. When igniter button is
pressed, there is spark at
ODS/pilot, but no ignition.
Press in control knob while in pilot position.
Continue holding down control knob. Repeat igniting operation until air is
removed.
E. ODS/pilot is clogged.
Replace ODS/pilot assembly or get it serviced.
Replace gas regulator.
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.
6. ODS/pilot lights, but flame
goes out when control knob
is released.
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.
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
1). Contact local gas company.
2). Replace ODS/pilot assembly or get pilot serviced.
2). Dirty or partially clogged ODS/pilot
F. Thermocouple damaged.
Replace thermocouple.
G. Control valve damaged.
Replace control valve.
7. Burner does not light after
A. Burner orifice is clogged.
Clean burner or replace burner orifice.
Replace burner orifice.
ODS/pilot is lit.
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.
Contact local gas company.
Contact local gas company.
Clean burner or replace burner orifice.
Clean burner or replace burner orifice.
Replace burner.
8. Delayed ignition of burner.
9. Burner backfiring during
A. Burner orifice is clogged or damaged.
B. Burner damaged.
combustion.
C. Gas regulator defective.
Replace gas regulator.
10. Slight smoke or odor during
A. Vapors from paint or curing process of logs.
Problemwillstopafterafewhoursofoperation.SFC recommendsrunningthe
heater with excess ventilation for the first few hours.
initial operation.
11. Heater produces a whistling
A. Turning control knob to “HI” position when burner is cold.
Turn control knob to “LO” position and let warm up for a minute.
noise when burner is lit.
B. Air in gas line.
Operateburneruntilairisremovedfromline.Havegaslinecheckedbylocalgas
company.
C. Dirty or partially clogged burner orifice.
Clean burner or replace burner orifice.
9
OPERATING INSTRUCTIONS
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION MAY
RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
A. This heater has a pilot which must be lit by hand. When
•
•
Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
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.
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.
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.
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.
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 ).
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.
4. Depress control knob in and turn clockwise
to the
“OFF” position (Figure 14 ).
10. Release the control knob while turning counterclockwise
to the "ON" Position (Figure 17 ). Then adjust
"HI-LO" knob to prefered setting.
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.
•
•
If the knob does not pop out when released, stop and
immediately call your service technician or gas supplier.
6. The pilot is located on the right side in front of the burner
If the pilot will not stay lit after several tries, depress and
(Figure 15 ).
turn the gas control knob clockwise
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
to “OFF”
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.
control knob clockwise
to “OFF” and call your
service technician or gas supplier.
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.
11. Wait 30 seconds before readjusting the heater when the
control knob has been turned down to a lower setting.
TO TURN OFF GAS TO HEATER
to the “OFF”
1. Depress and turn control knob clockwise
position (Figure 18 ).
MANUAL MATCH LIGHTING PROCEDURE — EMERGENCY ONLY
1. If the pilot cannot be lit with the piezo igniter, the heater can be 3. Light the match and hold the flame to the end of the pilot and
manually lit with a match.
ignite the pilot.
2. With the right hand, depress and turn the control knob
4. Continue to hold control knob for an additional 10 seconds to
counterclockwise
knob.
to the “ON” position. Hold in the
insure pilot remains lit.
5. Release the control while turning control knob to desired
setting.
10
Pilot
Piezo Ignitor
Gas Control
Knob
Flame Adjustment
Knob
Control Knob Locations
Pilot Location
Figure 13
Figure 15
N
O
O
L
I
T
P
T
O
O
L
F
O
F
I
P
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
Figure 14
Figure 16
i t
F
P
T
I
L
Turn Control Knob to “ ON” Position
Figure 17
11
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
REPLACEMENT PARTS LIST
VFST-27VSN
VFST-27VSP
Part No.
No.
Description
Part No.
1.
2.
3.
4.
5.
Valve - Millivolt
Pilot Assembly
Piezo
903489
901914
111061
110361
112281
112291
110389
110321
110387
100110
901917
901915
111061
110361
112281
112291
110384
110321
110388
100110
Piezo Wire
Burner
Burner (Valve Side)
Burner Orifice (2 Each)
Burner Crossover Tube
Crossover Tube Orifice
Log Set
6.
7.
8.
9.
12
REPLACEMENT PARTS
9
1
7
8
4
3
2
5
6
13
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
NOTE: THIS PAGE INTENTIONALLY LEFT BLANK.
14
NOTE: THIS PAGE INTENTIONALLY LEFT BLANK.
15
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
Printed in U.S.A. © 1997 by Lennox Hearth Products
1110 West Taft Avenue
Orange, CA 92865
P/N 903588 REV. G 12/2007
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