Superior VD1824NM User manual

For use with log sets
Installation and Operation Instructions
Unvented (Vent-Free) Gas Log Heaters
Models
PFS
®
US
Report No. F09-129
P/N 126838-01 REV. C 08/2016
VD1824NM VD1824PM
P126838-01
LVD18GO LVD18TB LVD18CH LDV18CO
LVD24GO LVD24TB LVD24CH LDV24CO
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
This appliance may be installed in an aftermarket permanently located, manufactured (mobile) home,
where not prohibited by local codes. This appliance is only for use with the type of gas indicated on the
rating plate. This appliance is not convertible for use with other gases.
WARNING: This appliance is for installation only in a solid-fuel burning masonry or UL127 factory-built
fireplace or in a listed ventless firebox enclosure. It is design-certified for these installations in accordance
with ANSI Z21.11.2. Exception: DO NOT install this appliance in a factory-built fireplace that includes
instructions stating it has not been tested or should not be used with unvented gas logs.
This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed. Provisions
for adequate combustion and ventilation air must be provided. Refer to Air for Combustion and Ventilation
section on Page 6 of this manual.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury, death, or property damage.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Leave the building immediately.
• 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.
- Installation and service must be performed by a qualified installer, service agency or the gas supplier.

SuperiorFireplaces.US.com 126838-01C2
SAFETY
WARNING: Improp-
er installation, adjust-
ment, alteration, service
ormaintenancecancause
injury or property dam-
age. Refer to this manual
forcorrectinstallationand
operational procedures.
For assistance or addi-
tional information consult
a qualified installer, ser-
vice agency or the gas
supplier.
WARNING: This ap-
pliance is for installation
only in a solid-fuel-burning
masonry or UL127 factory-
built fireplace or in a listed
ventlessfireboxenclosure.
It is design-certified for
theseinstallationsinaccor-
dance with ANSI Z21.11.2.
Exception: DO NOT install
this appliance in a factory-
builtfireplacethatincludes
instructions stating it has
not been tested or should
not be used with unvented
gas logs.
WARNING: This is an
unvented gas-fired heat-
er. It uses air (oxygen)
from the room in which
it is installed. Provisions
for adequate combustion
and ventilation air must
be provided. Refer to Air
for Combustion and Ven-
tilation section on Page 6
of this manual.
This appliance may be in-
stalledinanaftermarket,*
permanently located,
manufactured (mobile)
home, where not prohib-
ited by local codes.
This appliance is only for
use with the type of gas
indicated on the rating
plate. This appliance is
not convertible for use
with other gases.
* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer
TABLE OF CONTENTS
Safety .................................................................. 2
Product Identification........................................... 5
Local Codes......................................................... 5
Unpacking............................................................ 5
Product Features................................................. 5
Air For Combustion and Ventilation..................... 6
Installation ........................................................... 8
Operation........................................................... 23
Inspecting Burners............................................. 24
Cleaning and Maintenance................................ 25
Troubleshooting................................................. 26
Replacement Parts............................................ 30
Service Hints ..................................................... 30
Technical Service............................................... 30
Specifications .................................................... 30
Parts.................................................................. 31
Accessories....................................................... 37
Warranty............................................................ 39

SuperiorFireplaces.US.com
126838-01C 3
WARNING: This product
contains and/or generates
chemicals known to the State
of California to cause cancer or
birth defects or other reproduc-
tive harm.
IMPORTANT: Read this owner’s
manualcarefullyandcompletely
beforetryingtoassemble,oper-
ate or service this appliance.
Improper use of this appliance
can cause serious injury or
death from burns, fire, explo-
sion,electricalshockandcarbon
monoxide poisoning.
DANGER:Carbonmonoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs
of carbon monoxide poisoning resemble the
flu, with headaches, dizziness or nausea. If
you have these signs, the fireplace may not
be working properly. Get fresh air at once!
Have fireplace serviced. Some people are
more affected by carbon monoxide than oth-
ers. These include pregnant women, people
with heart or lung disease or anemia, those
under the influence of alcohol and those at
high altitudes.
Natural and Propane/LP Gas: Natural and
propane/LP gases are odorless. An odor-
making agent is added to these gases. The
odor helps you detect a gas leak. However,
the odor added to the gas can fade. Gas may
be present even though no odor exists.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this fireplace.
WARNING: Any change to
this heater or its controls can
be dangerous.
SAFETY
Continued
WARNING: Do not allow fans
to blow directly into the fireplace.
Avoid any drafts that alter burner
flame patterns. Ceiling fans can
createdrafts that alter burnerflame
patterns. Altered burner patterns
can cause sooting.
Due to high temperatures, the ap-
pliance should be located out of
traffic and away from furniture and
draperies.
Do not place clothing or other
flammable material on or near the
appliance. Never place any objects
on the heater.
Heater base assembly becomes
veryhotwhenrunningheater.Keep
children and adults away from hot
surface to avoid burns or clothing
ignition.Heaterwillremainhotfora
time after shutdown. Allow surface
to cool before touching.
Carefully supervise young children
whentheyareintheroomwithheater.
When using the hand-held remote
accessory, keep selector switch in
theOFFpositiontopreventchildren
fromturningonburnerswithremote.
You must operate this heater with
the fireplace screen and hood in
place. Make sure fireplace screen
andhoodareinplacebeforerunning
heater. The fireplace screen shall
have openings for introduction of
combustion air.
Keep the appliance area clear and
free from combustible materials,
gasoline and other flammable va-
pors and liquids.

SuperiorFireplaces.US.com 126838-01C4
SAFETY
Continued
1. Thisapplianceisonly for usewiththetype
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supplytank(s)outdoors (propane/LPunits
only).
3. Topreventperformanceproblems,the use
ofapropane/LPtank of less than 100 lbs.
capacity is not recommended (propane/
LP units only).
4. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touchany electrical switch; do not
use any phone in your building
• immediately call your gas supplier from
aneighbor’s phone. Follow the gas sup-
plier’s instructions
• if you cannot reach your gas supplier,
call the fire department
5. This heater shall not be installed in a
bedroom or bathroom.
6. Do not burn solid-fuel in a fireplace in
whichavent-freeroom heater is installed.
7. Beforeinstallinginasolidfuel-burning fire-
place, the chimney flue and firebox must
be cleaned of soot, creosote, ashes and
loosepaintbyaqualifiedchimneycleaner.
Creosotewilligniteif highlyheated.Adirty
chimney flue may create and distribute
soot within the house. Inspect chimney
flue and firebox for damage. If damaged,
repair flue before operating heater.
8. Iffireplacehasglassdoors, never operate
this heater with glass doors closed. Any
glassdoorsshall befullyopened whenthe
appliance is in operation. If you operate
heater with doors closed, heat buildup
inside fireplace will cause glass to burst.
Make sure there are no obstructions
across openings of fireplace.
9. This log heater is designed to be smoke-
less.Iflogseverappear to smoke, turn off
heaterandcallaqualified service person.
NOTE: During initial operation, slight
smokingcouldoccur duetologcuring and
heater burning manufacturing residues.
10. To prevent the creation of soot, follow the
instructionsinCleaning andMaintenance,
Page 25.
11. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater off.
If heated, the vapors from these products
may create a white powder residue within
burnerboxoronadjacentwallsorfurniture.
12. This heater needs fresh, outside air ven-
tilationtorunproperly.This heater has an
Oxygen Depletion Sensing (ODS) safety
shutoff system.The ODS shuts down the
heater if not enough fresh air is available.
See Air for Combustion and Ventilation,
Page 6. If heater keeps shutting off, see
Troubleshooting, Page 25.
13. Do not run heater
• where flammable liquids or vapors are
used or stored
• under dusty conditions
14. Donotusethisheatertocookfood orburn
paper or other objects.
15. Do not use this room heater if any part
has been under water. Immediately call
a qualified service technician to inspect
the room heater and to replace any part
of the control system and any gas control
which has been under water.
16. Donotoperateheaterif any log isbroken.
Do not operate heater if a log is chipped
(dime-sized or larger).
17. Turn heater off and let cool before servic-
ing.Onlyaqualifiedservice personshould
service and repair heater.
18. Operating heater above elevations of
4,500 feet could cause pilot outage.
19. Provide adequate clearances around air
openings.
20. Solid fuels shall not be burned in a fire-
place in which an unvented room heater
is installed.
21. Installation and the provisions for com-
bustion and ventilation air must conform
with the National Fuel Gas Code, ANSI
Z223.1/NFPA 54.
22. Wheninstallingas a ventedapplianceina
manufactured home or mobile home, the
installation must conform with the Manu-
factured Home Construction and Safety
Standard, Title 24 CFR, Part 3280, or
whenapplicable,withManufactureHome
Installations Standard, ANSI/NCBCS
A225.1/NFPZ 501A.

SuperiorFireplaces.US.com
126838-01C 5
Figure 1 - Yellow Flame Vent-
Free Gas Log Heater
PRODUCT IDENTIFICATION
PRODUCT FEATURES
OPERATION
This heater is clean burning. It requires no
outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by
realistic, dancing yellow flames. This heater
is designed for vent-free operation with flue
damper closed. It has been tested and ap-
proved to theANSI Z21.11.2 standard for un-
ventedheaters.State andlocalcodesinsome
areas prohibit the use of vent-free heaters.
SAFETY PILOT
Thisheaterhasapilotwith an Oxygen Deple-
tionSensing(ODS)safetyshutoffsystem.The
ODS/pilot is a required feature for vent-free
room heaters. The ODS/pilot shuts off the
heater if there is not enough fresh air.
Control Knob
Log Set
Left
Side
Right
Side
Front
LOCAL CODES NOTE:Donotpickupappliancebaseas-
semblybyburners.Thiscould damagethe
appliance.Alwayshandlebaseassembly
by grate.
2. Remove all protective packaging applied
to logs and appliance for shipment.
3. Check appliance for any shipping dam-
age. If appliance is damaged, promptly
inform dealer where you purchased the
appliance.
Install and use appliance with care. Follow all
localcodes.Intheabsenceof localcodes,use
the latest edition of The National Fuel Gas
Code, ANSI Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
25 West 43rd Street, 4th floor
New York, NY 10036
National Fire Protection Association, Inc.
1 Batterymarch Park
Quincy, MA 02169-7471
Quincy, MA 02269
UNPACKING
1. Removelogsandappliancebase assem-
bly from carton(s).
COMMONWEALTH OF MASSACHUSETTS REQUIREMENTS
These appliances are approved for installation in the US state of Massachusetts if the fol-
lowing additional requirements are met:
• Un-vented Room Heaters shall be installed in accordance with 527 CMR 30.
• Installation and repair must be done by a plumber or gas fitter licensed in the Common-
wealth of Massachusetts.
• Theflexiblegaslineconnector used shall not exceed36inches(92centimeters)inlength.
• The individual manual shut-off must be a T-handle type valve.
• Unvented appliances may NOT be installed in 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 provide
to each purchaser a copy of 527 CMR 30 upon sale of the unit.
CAUTION: Do not remove
the data plates from the grate
assembly. The data plates
contain important warranty
and safety information.

SuperiorFireplaces.US.com 126838-01C6
AIR FOR COMBUSTION AND VENTILATION
Today’shomesarebuiltmoreenergyefficient
thanever.Newmaterials, increasedinsulation
and new construction methods help reduce
heat loss in homes. Homeowners apply
weather strip and caulk around windows and
doorstokeep the coldairoutand the warmair
in.Duringheatingmonths,homeowners want
their homes as airtight as possible.
While it is good to make your home energy
efficient, your home needs to breathe. Fresh
air must enter your home.All fuel-burning ap-
pliancesneedfreshairforpropercombustion
and ventilation.
Exhaust fans, some fireplaces, clothes dryers
and some fuel-burning appliances draw air
from the house to operate. You must provide
adequate fresh air for these appliances. That
will ensure proper venting of vented fuel-
burning appliances.
PROVIDING ADEQUATE
VENTILATION
ThefollowingareexcerptsfromNational Fuel
Gas Code. ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on Pages 6-8 will help you
classify your space and provide adequate
ventilation.
Unusually Tight Construction
The air that leaks around doors and windows
may provide enough fresh air for combustion
and ventilation. However, in buildings of un-
usually tight construction, you must provide
additional fresh air.
Unusually tight construction is defined as
construction where:
a. walls and ceilings exposed to the out-
side atmosphere have a continuous
water vapor retarder with a rating of
one perm (6x10-11 kg per pa-sec-m2) or
less with openings gasketed or sealed
and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to
areas such as joints around window
and door frames, between sole plates
and floors, between wall-ceiling joints,
between wall panels, at penetrations
for plumbing, electrical and gas lines
and at other openings.
If your home meets all three criteria above,
you must provide additional fresh air. See
Ventilation Air From Outdoors, Page 8.
If your home does not meet all three crite-
ria above, proceed to Determining Fresh-
Air Flow For Heater Location.
Confined Space and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/
NFPA54 allows two methods for determining
whetherthespace inwhichtheheater isbeing
installedisconfinedor unconfinedspace.The
PRODUCT FEATURES
OPERATION
This heater is clean burning. It requires no
outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by
realistic, dancing yellow flames. This heater
is designed for vent-free operation with flue
damper closed. It has been tested and ap-
proved to theANSI Z21.11.2 standard for un-
ventedheaters.State andlocalcodesinsome
areas prohibit the use of vent-free heaters.
SAFETY PILOT
Thisheaterhasapilotwith an Oxygen Deple-
tionSensing(ODS)safetyshutoffsystem.The
ODS/pilot is a required feature for vent-free
room heaters. The ODS/pilot shuts off the
heater if there is not enough fresh air.
WARNING: This heater shall not
be installed in a room or space un-
less the required volume of indoor
combustion air is provided by the
method described in the National
Fuel Gas Code, ANSI Z223.1/NFPA
54, the International Fuel Gas Code,
or applicable local codes. Read the
following instructions to ensure
properfreshair for thisandotherfuel-
burning appliances in your home.

SuperiorFireplaces.US.com
126838-01C 7
standardmethoddefinesa confined spaceas
a space whose volume is less than 50 cubic
feet per 1,000 Btu per hour (4.8 m3per kw)
of the aggregate input rating of all appliances
installed in that space and an unconfined
space as a space whose volume is not less
than50 cubic feet per 1,000 Btu per hour (4.8
m3per kw) of the aggregate input rating of
all appliances installed in that space. Rooms
communicating directly with the space in
which the appliances are installed*, through
openingsnotfurnished withdoors,are consid-
ered a part of the unconfined space.
Where the air infiltration rate of a structure is
known,theKnownAirInfiltrationRate Method
may be used. Follow The National Fuel Gas
Code, ANSI Z223.1/NFPA 54 to use this
method to determine if the space is confined
or unconfined.
* Adjoining rooms are communicating only if
therearedoorless passagewaysorventilation
grills between them.
DETERMINING FRESH-AIR FLOW
FOR FIREPLACE LOCATION
Determining if You Have a Confined or
Unconfined Space Using the Standard
Method
Use this work sheet to determine if you have
a confined or unconfined space.
Space: Includes the room in which you will
installfireplaceplusanyadjoining rooms with
doorless passageways or ventilation grills
between the rooms.
1. Determine the volume of the space (length
x width x height).
LengthxWidth xHeight =__________cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2,560 cu. ft.
(volume of space)
If additional ventilation to adjoining room
is supplied with grills or openings, add the
volume of these rooms to the total volume
of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
________ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 2,560 cu. ft. (volume of space) x
20 = 51,200 (maximum Btu/Hr the space can
support)
3. Addthe Btu/Hrofall fuel-burningappliances
in the space.
40,000
31,500
71,500
Vent-free fireplace __________ Btu/Hr
Gas water heater* __________Btu/Hr
Gas furnace __________Btu/Hr
Vented gas heater __________Btu/Hr
Gas fireplace logs __________Btu/Hr
Other gas appliances*+ __________ Btu/Hr
Total = __________Btu/Hr
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
Gas water heater __________Btu/Hr
Vent-free fireplace + __________Btu/Hr
Total = __________Btu/Hr
4. Compare the maximum Btu/Hr the space
can support with the actual amount of Btu/
Hr used.
_______
Btu/Hr (maximum the space can
support)
_______ Btu/Hr (actual amount of Btu/Hr
used)
Example: 51,200 Btu/Hr (maximum the
space can support)
71,500 Btu/Hr (actual amount of
Btu/Hr used)
The space in the example is a confined space
because the actual Btu/Hr used is more than the
maximum Btu/Hr the space can support. You
must provide additional fresh air. Your options
are as follows:
A. Rework worksheet, adding the space of an
adjoiningroom.Iftheextraspace providesan
unconfined space, remove door to adjoining
room or addventilation grills between rooms.
See Ventilation Air From Inside Building.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors,Page 8.
C. Install a lower Btu/Hr heater, if lower Btu/Hr
size makes room unconfined.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is
anunconfined space.You willneed noadditional
fresh air ventilation.
WARNING: If the area in which
the heater may be operated does
not meet the required volume for
indoor combustion air, combustion
and ventilation air shall be provided
by one of the methods described in
the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, the International
Fuel Gas Code, or applicable local
codes.

SuperiorFireplaces.US.com 126838-01C8
AIR FOR COMBUSTION AND VENTILATION
Continued
Figure 3 - Ventilation Air from Outdoors
Outlet
Air
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining
unconfined space. When ventilating to an ad-
joiningunconfinedspace,youmustprovidetwo
permanentopenings: onewithin12"oftheceil-
ing and one within 12" of the floor on the wall
connecting the two spaces (see options 1 and
2, Figure 2). You can also remove door into
adjoining room (see option 3, Figure 2). Fol-
low the National Fuel Gas CodeANSI Z223.1/
NFPA 54 Air for Combustion and Ventilation
for required size of ventilation grills or ducts.
Figure 2 - Ventilation Air from Inside Building
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills Into
Adjoining
Room,
Option 1
12"
12"
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent openings: one within 12" of the ceiling
andonewithin12"ofthefloor. Connect these
items directly to the outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation for required size
of ventilation grills or ducts.
IMPORTANT:Do not provide openings
for inlet or outlet air into attic if attic has a
thermostat-controlled power vent. Heated air
entering the attic will activate the power vent.
INSTALLATION
NOTICE: This appliance is intended
foruseassupplementalheat.Usethis
appliance along with your primary
heatingsystem.Donotinstallthisap-
pliance as your primary heat source.
If you have a central heating system,
you may run system’s circulating
blower while using appliance. This
willhelpcirculatetheheatthroughout
the house. In the event of a power
outage, you can use this appliance
as your primary heat source.
WARNING: Seal any fresh air vents
or ash clean-out doors located on floor
or wall of fireplace. If not, drafting may
cause pilot outage or sooting. Use a heat-
resistant sealant. Do not seal chimney
flue damper.
WARNING: A qualified service
person must install appliance. Fol-
low all local codes.
NOTICE:Stateorlocalcodesmayonlyallow
operation of this appliance in a vented con-
figuration. Check your state or local codes.
WARNING:Anyoutsideairducts
and/or ash dumps in the fireplace
shallbepermanently closedattime
of appliance installation.

SuperiorFireplaces.US.com
126838-01C 9
INSTALLATION
Continued
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. Creosote will
igniteifhighlyheated.Adirty chimney flue
may create and distribute soot within the
house. Inspect chimney flue and firebox
fordamage.Ifdamaged,repairfluebefore
operating heater.
CAUTION: This heater creates warm
air currents. These currents move heat
to wall surfaces next to heater. Install-
ing heater next to vinyl or cloth wall
coverings or operating heater where
impurities (such as, but not limited
to, tobacco smoke, aromatic candles,
cleaning fluids, oil or kerosene lamps,
etc.) in the air exist, may discolor walls
or cause odors.
WARNING: This appliance is
equipped for either natural gas or
propane/LP gas but not both. Gas type
is indicated on the rating plate. Field
conversion is not permitted.
WARNING: Never install the heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture, clothing or
other flammable objects are less than 36"
from front or 42" from top of heater. For
side clearances see Figure 4, Page 10
• in high traffic areas
• in windy or drafty areas
INSTALLATION AND CLEARANCES
(Vent-Free Operation Only)
MINIMUM FIREPLACE CLEARANCE
TO COMBUSTIBLE MATERIALS
Side Wall 16", Ceiling 42", Front 36"
LOG SIZING REQUIREMENTS
Log
Size
Minimum Firebox
Height Depth Front Width Rear * Width
18" 17" 13.5" 24" 20.5"
24" 17" 13.5" 28" 20.5"
* Measured at 13.5" depth.
IMPORTANT:Vent-free appliances add
moisture to the air.Although this is beneficial,
installing appliance in rooms without enough
ventilationairmaycausemildewtoformfrom
too much moisture. See Air for Combustion
and Ventilation, Page 6.
CHECK GAS TYPE
Usethe correcttypeofgas(naturalorpropane/
LP). If your gas supply is not the correct gas
type, do not install appliance. Call dealer
whereyoupurchased the applianceforproper
type appliance.
WARNING:Maintainthe minimum
clearances. Ifyou can,providegreater
clearances from floor, ceiling and
adjoining wall.
Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127-listed manufactured fireplace or certi-
fied vent-free firebox.
MINIMUM CLEARANCES FOR SIDE
COMBUSTIBLE MATERIAL, SIDE WALL
AND CEILING
A. Clearances from the side of the fireplace
cabinet to any combustible material and
wall should follow diagram in Figure 4.
Example:Theface ofamantel,bookshelf,
etc. is made of combustible material and
protrudes 3-1/2" from the wall. This com-
bustiblematerialmustbe4" from the side
of the fireplace cabinet (see Figure 4).

SuperiorFireplaces.US.com 126838-01C10
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
INSTALLATION
Continued
MINIMUM NONCOMBUSTIBLE
MATERIAL CLEARANCES
If Not Using Mantel
NOTE: If using a mantel, proceed to If Us-
ing Mantel. If not using a mantel, follow the
information below.
You must have noncombustible material(s)
abovethefireplaceopening. Noncombustible
materials (such as slate, marble, tile, etc.)
must be at least 1/2" thick. With sheet metal,
you must have noncombustible material be-
hindit.Noncombustiblematerialmustextend
at least 12" up (for all models). See Figure 5
for minimum clearances.
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Noncombustible
Material Distance (A)
Requirements for Safe
Installation
12" or more Noncombustible mate-
rial OK.
Between 8"
and 12" Install fireplace hood ac-
cessory (GA6050 - see
Accessories, Page 37).
Less than 8" Noncombustible material
must be extended to at
least 8". See Between
8" and 12", above. If you
cannot extend material,
you must operate appli-
ance with flue damper
open and damper clamp
installed.
NOTE: When installing your gas logs into
a manufactured firebox, follow firebox
manufacturer’s instructions for minimum
clearances to combustible materials.
B. Clearances from the top of the fireplace
opening to the ceiling should not be less
than 42".
NOTICE: Manual control appliances
may be used as a vented product. If
so, you must always run appliance
with chimney flue damper open. If
runningappliancewith damperopen,
noncombustible material above fire-
place opening is not needed. Go to
Installing Damper Clamp Accessory
(Required For Vented Applications),
Page 12.
If Using Mantel
You must have noncombustible material(s)
above the fireplace opening. Noncombustible
materials(such asslate,marble,tile,etc.)must
be at least 1/2" thick. With sheet metal, you
musthavenoncombustiblematerialbehind it.
Noncombustiblematerialmust extend atleast
8inchesup (for allmodels).Ifnoncombustible
material is less than 12", you must install the
fireplacehood accessory.Evenif noncombus-
tible material is more than 12", you may need
thehoodaccessorytodeflectheatawayfrom
yourmantelshelf. SeeFigures 5-7, onPages
10-11)for minimum clearances.
IMPORTANT:If you cannot meet these mini-
mum clearances, you must operate heater
withchimneyfluedamperopen.GotoInstall-
ing Damper Clamp Accessory (Required For
Vented Applications), Page 12.

SuperiorFireplaces.US.com
126838-01C 11
Minimum
Noncombustible
Material
Minimum
Noncombustible
Material Height
Distances to
Underside of
Mantel
Top of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
12"
(A)
18" 20" 22" 24"
All
minimum
distances
are in
inches
2
1
/ 2 "
6"
8"
10"
INSTALLATION
Continued
MANTEL CLEARANCES
In addition to meeting noncombustible mate-
rial clearances, you must also meet required
clearances between fireplace opening and
mantelshelf.Ifyoudo notmeetthe clearances
listed below, you will need a hood.
Determining Minimum Mantel Clearance
If you meet minimum clearance between
mantel shelf and top of fireplace opening, a
hood is not required (see Figure 6).
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Minimum clearance requirements include any projections such
as shelves, window sills, mantels, etc. above the appliance.
NOTICE: Surface temperatures of ad-
jacent walls and mantels become hot
during operation. Walls and mantels
above the firebox may become hot to
the touch. If installed properly, these
temperatures meetthe requirement of
the national product standard. Follow
all minimum clearances shown in
this manual.
NOTICE: If your installation does not
meettheminimumclearancesshown,
you must do one of the following:
• raise the mantel to an acceptable
height
Determining Minimum Mantel Clearance
When Using a Hood
IfminimumclearancesinFigure6,arenotmet,
youmusthaveahood.Whenusingahoodthere
are still certain minimum mantel clearances
required. Follow minimum clearances shown
in Figure 7 when using hood.
Minimum
Noncombustible
Material
8"
Min.
12" 15" 18" 20"
2½"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050 or
GA6053)
Top of
Fireplace
Opening
Undersid
of Mantel
Shelf
Mantel Shelf
Figure 7 - Minimum Mantel Clearances
When Using Hood
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
FLOOR CLEARANCES
A. If installing appliance on the floor level,
you must maintain the minimum distance
of 14" to combustibles (see Figure 8).
B. If combustible materials are less than
14" to the fireplace, you must install ap-
pliance at least 5" above the top surface
of combustible flooring including tile and
carpet (see Figure 9).
14"
Min.
Combustible
Material
Noncombustible Material
Hearth
5"
Min.
Combustible
Material

SuperiorFireplaces.US.com 126838-01C12
INSTALLATION
Continued
INSTALLING DAMPER CLAMP
ACCESSORY FOR VENTED
OPERATION
NOTE: When used as a vented heater,
appliance must be installed only in a solid-
fuel-burning fireplace with a working flue and
constructed of noncombustible material.
For Massachusetts Residents Only: Instal-
lation of this vented gas log set in the Com-
monwealth of Massachusetts requires the
damper be permanently removed or welded
in the fully open position.
If your heater is a manually-controlled model,
you may use this heater as a vented product.
There are three reasons for operating your
heater in the vented mode.
1. The fireplace does not meet the clearance
to combustibles requirements for vent-free
operation.
2. State or local codes do not permit vent-
free operation.
3. You prefer vented operation.
If reasons number 1 or 2 apply to you,
you must permanently open chimney flue
damper. You must install the damper clamp
accessory (to order, see Accessories, Page
37). This will ensure vented operation (see
Figure 10). The damper clamp will keep
damper open. Installation instructions are
included with clamp accessory.
See chart for minimum permanent flue open-
ingyoumust provide.Attachdamperclampso
the minimum permanent flue opening will be
maintained at all times.
INSTALLING HEATER BASE
ASSEMBLY
Chimney
Height Minimum Permanent Flue Opening
6' to 15' 39 sq. in.
15' to 30' 29 sq. in.
Figure 10 - Attaching Damper Clamp
Damper
Clamp
Manufactured Fireplace
Masonry Fireplace
Damper
Clamp
Area of Various Standard
Round Flues
Diameter Area
5" 20 sq. in.
6" 29 sq. in.
7" 39 sq. in.
8" 51 sq. in.
Damper
Damper
Damper
WARNING: You must secure this
heater to fireplace floor. If not, heater
will move when you adjust controls.
Moving heater may cause a gas leak
or log misplacement.
CAUTION: Do not pick up heater
base assembly by burners. This could
damage heater. Only handle base
assembly by grates.
WARNING:Ifinstallingina sunken
fireplace,special careisneeded. You
must raise the fireplace floor to allow
access to heater control panel. This
will ensure adequate air flow and
guard against sooting and controls
being damaged. Raise fireplace floor
with noncombustible material. Make
sure material is secure.
IMPORTANT:Make sure the heater burners
are level. If heater is not level, heater will not
work properly.

SuperiorFireplaces.US.com
126838-01C 13
INSTALLATION
Continued
Installation Items Needed
• hardware package (provided with heater)
• approved flexible gas hose and fittings (if
allowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" drill bit (metal or
masonry as applicable)
• flathead screwdriver
• pipe wrench
1. Connectapprovedflexiblegas hoseto gas
control fitting in heater (see Figure 11).
IMPORTANT:Holdgasfittingwithwrench
when connecting flexible gas hose.
2. Locate two masonry screws in hardware
package.
3. Place heater base in fireplace.
4. Placelogsintheirproperpositiononheater
base (see Installing Logs, Pages 17-22).
5. Centerheaterbaseand logs front-to-back
and side-to-side in fireplace.
6. Carefully remove logs without moving
heater base.
7. Mark screw locations through one hole on
each side of the mounting bracket (see
Figure12,Page 13).Ifinstallinginabrick-
bottom fireplace, mark screw locations in
mortar joint of bricks.
8. Remove heater base from fireplace. If
installing optional control accessories,
do so at this time. Follow all directions
provided with accessory.
9. Drillholesatmarked locations using3/16"
drill bit.
10. Attach base assembly to fireplace floor
using two masonry screws (in hardware
package).
WARNING: This appliance
requires a 1/2" NPT (National Pipe
Thread) inlet connection to the pres-
sure regulator.
CAUTION:Neverconnectpropane/
LP appliance directly to the propane/
LP supply. This appliance requires
an external regulator (not supplied).
Install theexternal regulatorbetween
theapplianceandpropane/LPsupply.
WARNING: A qualified service
person must connect heater to gas
supply. Follow all local codes.
WARNING: Neverconnect natural
gas appliance to private (non-utility)
gas wells. This gas is commonly
known as wellhead gas.
Figure 11 - Attaching Flexible Gas Hose
to Heater
Flexible Gas
Hose (if allowed
by local codes)
Fitting
Figure 12 - Attaching Base to Fireplace
Floor
Masonry
Screw
Mounting
Bracket
CONNECTING TO GAS SUPPLY

SuperiorFireplaces.US.com 126838-01C14
INSTALLATION
Continued
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A equipment shutoff valve with 1/8" NPT
tap is an acceptable alternative to test gauge
connection.Purchasetheoptionalequipment
shutoff valve from your dealer.
For propane/LP units, the installer must
supply an external regulator. The external
regulator will reduce incoming gas pressure.
You must reduce incoming gas pressure to
between 11" and 14" of water. If you do not
reduceincominggaspressure, heater regula-
tordamagecouldoccur. Install external regu-
lator with the vent pointing down as shown in
Figure 13. Pointing the vent down protects it
from freezing rain or sleet. Figure 13 - External Regulator With Vent
Pointing Down
External
Regulator
Propane/LP
Supply Tank
Vent
Pointing
Down
* Purchase the optional equipment shutoff
valve from your dealer.
**Minimuminletpressure for purpose ofinput
adjustment.
Figure 14 - Gas Connection
Gas
Control
3” Minimum
Equipment Shutoff
Valve With 1/8"
NPT Tap*
Approved
Flexible
Gas Hose (if
allowed by
local codes)
PROPANE/LP
From External
Regulator (11"
W.C.** to 14" W.C.
Pressure)
NATURAL
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
Cap Pipe Tee
Nipple Joint
Sediment Trap
CAUTION: Use only new, black
iron or steel pipe. Internally-tinned
copper tubing may be used in certain
areas. Check your local codes. Use
pipe of 1/2" diameter or greater to
allow proper gas volume to heater.
If pipe is too small, undue loss of
volume will occur.
WARNING: Use pipe joint sealant
that is resistant to liquid petroleum
(LP) gas.
Installationmustinclude an equipmentshutoff
valve,unionandplugged1/8"NPTtap. Locate
NPT tap within reach for test gauge hook up.
NPT tap must be upstream from heater (see
Figure 14).
IMPORTANT:Install equipment shutoffvalve
in an accessible location. The equipment
shutoff valve is for turning on or shutting off
the gas to the appliance.
Check your building codes for any special
requirements for locating equipment shutoff
valve to appliances.
Apply pipe joint sealant lightly to male NPT
threads.This will preventexcesssealantfrom
going into pipe. Excess sealant in pipe could
result in clogged heater valves.

SuperiorFireplaces.US.com
126838-01C 15
INSTALLATION
Continued
We recommendthat youinstall asediment trap
in supply line as shown in Figure 14. Locate
sediment trap where it is within reach for
cleaning. Install in piping system between
fuel supply and heater. Locate sediment trap
where trapped matter is not likely to freeze.
A sediment trap traps moisture and contami-
nants.This keepsthemfromgoinginto heater
controls. If sediment trap is not installed or is
installed wrong, heater may not run properly.
3. Pressurizesupplypipingsystemby either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas or using compressed air.
4. Checkalljointsofgassupplypipingsystem.
Apply noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnectheater and equipment shutoff
valve to gas supply. Check reconnected
fittings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see
Figure 15).
2. Pressurizesupplypipingsystemby either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas or using compressed air.
3. Checkalljointsfromgasmetertoequipment
shutoff valve for natural gas or propane/
LP supply to equipment shutoff valve for
propane/LP (see Figures 16 and 17).Ap-
ply noncorrosive leak detection fluid to all
joints. Bubbles forming show a leak.
4. Correct all leaks at once.
CAUTION: Avoid damage to gas
control. Hold gas fitting with wrench
when connecting it to gas piping and/
or fittings.
WARNING: Testallgaspiping and
connections, internal and external
to unit, for leaks after installing or
servicing. Correct all leaks at once.
WARNING: Never use an open
flame to check for a leak. Apply a
noncorrosive leak detection fluid to
all joints. Bubbles forming show a
leak. Correct all leaks at once.
CAUTION: Make sure external
regulator has been installed between
propane/LP supply and heater. See
guidelines under Connecting to Gas
Supply, Page 13.
CHECKING GAS CONNECTIONS
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
mentshutoffvalve from gas supply piping
system. Pressures in excess of 1/2 psig
(3.5 kPa) will damage heater regulator.
2. Capoffopenendofgaspipewhereequip-
ment shutoff valve was connected.
Figure 15 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff
Valve
Figure 16 - Checking Gas Joints
(Propane/LP Model Shown)
Gas Control
Valve Location
Propane/LP
Supply Tank Equipment Shutoff Valve

SuperiorFireplaces.US.com 126838-01C16
INSTALLATION
Continued
PRESSURE TESTING APPLIANCE GAS
CONNECTIONS
1. Open equipment shutoff valve (see
Figure 17).
2. Open main gas valve located on or near
gas meter for natural gas or open pro-
pane/LP supply tank valve.
3. Make sure control knob of heater is in the
OFF position.
4. Check all joints from equipment shutoff
valve to gas control (see Figures 16 and
17). Apply noncorrosive leak detection
fluid to all joints. Bubbles forming show a
leak.
5. Correct all leaks at once.
6. Light heater (see Operation, Page 23).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, Page 24).
Figure 17 - Checking Gas Joints (Natural
Gas Only)
Gas Meter
Gas Control Valve
Location
Equipment
Shutoff Valve

SuperiorFireplaces.US.com
126838-01C 17
Figure 18 - Installing Rear and Middle Logs
(Picture may vary from actual)
Rear Log
Burner
Pin for
Hole in
Bottom
of Log
Center Log
Figure 19 - Installing Front Log
(Picture may vary from actual)
Front Log
Grate
INSTALLATION
Continued
LVD18GO AND LVD24GO
Itisveryimportantto install these logsexactly
as instructed. Do not modify logs. Only use
logs supplied with heater.
1. Place rear log onto base. Holes in bottom
of log must seat over pins on base as
shown in Figure 18.
2. Place center log onto base. Holes in bot-
tom of log must seat over pins on base
as shown in Figure 18.
INSTALLING LOGS
4. Place left crossover log as shown in Fig-
ure20,Page 18.Matchsquare pegontop
of center log with square hole on bottom
of left crossover log. Match pin on top of
front log with round hole on bottom of left
crossover log.
5. Place center crossover log as shown in
Figure 20, Page 18.Matchsquare pegon
topofrearlogwithsquareholeonbottom
of center crossover log. Match pin on top
of center log with round hole on bottom
of center crossover log.
6. Place left front crossover log as shown in
Figure 20, Page 18. Log should rest on
the grate and fit into recess area on the
center log.
3. Place front log onto grate as shown in
Figure 19. Front log has cut outs for the
fingers of the grate to fit into.
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 property damage or
personal injury.
CAUTION: After installation and
periodically thereafter, check to en-
sure that no flame comes in contact
with any log. With the heater set to
HI, check to see if flames contact any
log. If so, reposition logs according
to the log installation instructions in
this manual. Flames contacting logs
will create soot.

SuperiorFireplaces.US.com 126838-01C18
INSTALLATION
Continued
Figure 20 - Installing Left, Center and
Right Crossover Logs
(Picture may vary from actual)
Right
Crossover
Log
Left
Crossover
Log
Center
Crossover
Log
Square Peg
on Rear Log
Square
Peg on
Middle
Log
Round
Peg on
Front Log Round Peg
on Center
Log
LVD18TB AND LVD24TB
1. Place rear log (#1) onto base. Holes in
bottomoflogmustseat over pins on base
as shown in Figure 21.
2. Place middle log (#2) onto base. Holes in
bottomoflogmustseat over pins on base
as shown in Figure 21.
3. Place front log (#3) onto grate as shown
in Figure 22.
Figure 21 - Installing Rear and Middle
Logs (Picture may vary from actual)
Burner
Middle Log Rear Log
Pin for
Hole in
Bottom
of Log
Figure 22 - Installing Front Log
(Picture may vary from actual)
Figure 23 - Installing Left and Right Logs
(Picture may vary from actual)
Front Log
Grate
Left Top
Log
Square Peg
on Rear Log
Right
Top
Log
Round
Peg on
Front Log
4. Place left top log (#4) as shown in Figure
23. Match square peg on top of rear log
(#1)withsquareholeonbottomoflefttop
log(#4).Match roundpegontop ofmiddle
log (#2) with round hole on bottom of left
top log (#4).
5. Placerighttoplog(#5)asshowninFigure
23. Match square peg on top of rear log
(#1) with square hole on bottom of right
top log (#5). Match round peg on top of
front log (#3) with round hole on bottom
of right top log (#5).
Round
Peg on
Middle
Log

SuperiorFireplaces.US.com
126838-01C 19
LVD18CH AND LVD24CH
Itisveryimportantto install these logsexactly
as instructed. Do not modify logs. Only use
logs supplied with this appliance.
1. Placethe rear log onto base. Notches in
the back of the log must seat over the
pins on base as shown in Figure 24.
Make sure the rear log is pushed back
as far as it will go.
INSTALLATION
Continued
Figure 24 - Installing Rear Log
(Picture may vary from actual)
Figure 26 - Installing Front Log
(Picture may vary from actual)
Figure 25 - Installing Middle Log
(Picture may vary from actual)
2. Place the middle log on base. Holes in
bottom of log must seat over pins on
base as shown in Figure 25.
3. Place the front log onto grate as shown
in Figure 26.
4. Place the top right log onto the rear,
middleandfront logsasshownin Figure
27 (Page 20).The rear, middleandfront
logs has notches for the top right log to
set into. You may have to move the front
log from left to right to get it to line up
with the top right log.
Front Log
Grate
Rear Log
Burner
Pin for Hole
in Bottom of
Log
Pin for
Hole in
Bottom of
Log
Middle Log
Burner

SuperiorFireplaces.US.com 126838-01C20
INSTALLATION
Continued
Figure 27 - Installing Top Right Log
(Picture may vary from actual)
Figure 28 - Installing Middle Log
(Picture may vary from actual)
Figure 29 - Installing Top Left Log
(Picture may vary from actual)
Figure 30 - Final assembly
(Picture may vary from actual)
5. Place the top middle log onto the rear
& middle logs as shown in Figure 28.
Make sure to match up the shape on
the bottom of the top middle log with
the notches in the rear and middle logs.
6. Placethetopleftlog onto themiddleand
front logs as shown in Figure 29. Make
sure to match up the shape on the bot-
tom of the top left log with the notches
in the middle and front logs.
7. Final assembly is shown in Figure 30.
Log Notch
Front Log
Notch
Top Left Log
Middle Log
Top Middle
Log
Top Right Log
Middle
Log
Front Log
Rear Log
Log
Notch
Log
Notch
Middle
Log
Rear Log