Superior Gas Heater VFST 27VSN 2 User Manual

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  
neighbors 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 heaters 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 LOposition 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 “Bin  
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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