Superior VD1824NR User manual

For use with log sets
Installation and Operation Instructions
Superior®Unvented (Vent-Free) Gas Log Heater
Models
VD1824NR VD1824PR
US
Report No. F09-129
P/N 126839-01 Rev. D 06/2018
P126839-01
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.

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TABLE OF CONTENTS
Safety .................................................................. 2
Product Identification........................................... 5
Optional Remote Control Accessories................. 5
Unpacking............................................................ 5
Local Codes......................................................... 5
Product Features................................................. 5
Air for Combustion and Ventilation...................... 6
Installation ........................................................... 8
Operation........................................................... 22
Inspecting Burners............................................. 24
Cleaning and Maintenance................................ 24
Troubleshooting................................................. 25
Parts.................................................................. 30
Specifications .................................................... 36
Replacement Parts............................................ 36
Service Hints ..................................................... 36
Technical Service............................................... 36
Wiring Diagram.................................................. 36
Accessories....................................................... 37
Warranty ........................................................... 39
SAFETY
WARNING: FIRE, EXPLOSION, AND ASPHYXIATION HAZARD
Improperadjustment,alteration,service,maintenance,orinstallationofthis
heater or its controls can cause death or serious injury.
Read and follow instructions and precautions in User’s Information Manual
provided with this heater.
WARNING:Thisapplianceisfor
installationonlyinasolid-fuelburn-
ing masonry or UL127 factory-built
fireplace or in a listed ventless fire-
boxenclosure.Itisdesign-certified
fortheseinstallationsinaccordance
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.
WARNING: This is an unvented
gas-firedheater.Itusesair(oxygen)
fromtheroominwhichitisinstalled.
Provisionsforadequatecombustion
andventilationairmustbeprovided.
Refer to Air for Combustion and
Ventilation section on Page 6 of
this manual.
Thisappliancemaybeinstalledinan
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
convertibleforusewithothergases.
* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer
WARNING:Thisproductcontains
and/or generates chemicals known
to the state of California to cause
cancer or birth defects or other re-
productive harm.
DANGER: Carbon monoxide
poisoning may lead to death!
WARNING:Vent-freeproductsare
prohibitedforbedroomandbathroom
installation in the Commonwealth of
Massachusetts.

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126839-01D 3
Carbon Monoxide Poisoning: Early signs
of carbon monoxide poisoning resemble the
flu, with headaches, dizziness or nausea. If
you have these signs, the heater may not be
workingproperly. Get fresh air at once! Have
heater serviced. Some people are more af-
fectedbycarbonmonoxidethan others.These
include pregnant women, people with heart
or lung disease or anemia, those under the
influenceofalcoholand thoseathighaltitudes.
Natural and Propane/LP Gas: Natural and
propane/LP gases are odorless. An odor-
making agent is added to the gas. 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 heater.
SAFETY
Continued
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate
or service this appliance. Improper
use of this appliance can cause
serious injury or death from burns,
fire,explosion,electricalshockand
carbon monoxide poisoning.
WARNING: Any change to this
heater or its controls can be dan-
gerous.
WARNING: Do not use a blower
insert,heatexchangerinsertorother
accessorynotapprovedforusewith
this heater.
WARNING: Do not allow fans to
blow directly into the heater. Avoid
any drafts that alter burner flame
patterns. Ceiling fans can create
drafts that alter burner flame pat-
terns. 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.
Appliancebaseassemblybecomes
very hot when running appliance.
Children and adults should be
alertedtothehazardofhighsurface
temperature and should stay away
to avoid burns or clothing ignition.
Appliance will remain hot for a time
after shutdown. Allow surface to
cool before touching.
WARNING: Do not place log
scraps or volcanic stone on burner.
Young children should be care-
fully supervised when they are in
the same room with the appliance.
When using the hand-held remote
accessory, keep selector switch in
theOFFpositiontopreventchildren
fromturningonburnerswithremote.
You must operate this appliance
with the fireplace screen and hood
inplace.Makesurefireplacescreen
andhoodareinplacebeforerunning
appliance.Thefireplacescreenshall
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.
Solid-fuels shall not be burned in a
fireplaceinwhichanunventedroom
heater is installed.

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SAFETY Continued
2.Do not place propane/LP supply tank(s) inside
anystructure.Locatepropane/LPsupplytank(s)
outdoors (propane/LP units only).
3.To prevent performance problems, the use of a
propane/LP tank 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 touch any electrical switch; do not use
any phone in your building
• 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
5.This heater shall not be installed in a bedroom
or bathroom.
6.WARNING: Before installing in a solid
fuel-burning fireplace, the chimney flue
and firebox must be cleaned of soot, creo-
sote, ashes and loose paint by a qualified
chimney cleaner. Creosote will ignite if highly
heated. A dirty chimney flue may create and
distribute soot within the house. Inspect chim-
ney flue for damage. If damaged, repair flue
and firebox before operating appliance.
7.Do not burn solid-fuel in a fireplace in which a
vent-free appliance is installed.
8.If appliance has glass doors,neveroperatethis
appliance with glass doors closed. Any glass
doorsshallbefullyopenedwhentheappliance
is in operation. If you
operate appliance 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 smokeless. If
logs ever appear to smoke, turn off heater and
callaqualifiedserviceperson.NOTE:Duringinitial
operation, slight smoking could occur due to log
curingandheaterburningmanufacturingresidues.
Installation and repair should be done
by a qualified service person. The ap-
pliance should be inspected before use
and at least annually by a professional
service person. More frequent cleaning
may be required due to excessive lint
from carpeting, bedding material, etc. It
isimperativethatcontrolcompartments,
burners,andcirculatingairpassageways
of the appliance be kept clean.
1. WARNING: 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.
10. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
Page 25.
11.Beforeusingfurniturepolish,wax,carpetcleaner
or similar products, turn appliance off. If heated,
the vapors from these products may create a
white powder residue within burner box or on
adjacent walls and furniture.
12. This appliance needs fresh, outside air ven-
tilation to run properly. This appliance has an
OxygenDepletionSensing(ODS)safetyshutoff
system. The ODS shuts down the appliance if
enough fresh air is not available. See Air for
Combustion and Ventilation, Page 6. If appli-
ance keeps shutting off, see Troubleshooting,
Page 26.
13. Do not run appliance
• whereflammableliquidsorvaporsareusedor
stored
• under dusty conditions
14. Donotusethis appliance to cookfoodorburn
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. Do not operate appliance if any log is broken.
Do not operate appliance if a log is chipped
(dime-sized or larger).
17.
Turn appliance off and let cool before servic-
ing, installing or repairing. Only a qualified
service person should install, service or repair
appliance.
18. Operatingappliance aboveelevationsof4,500
feet may cause pilot outage.
19. To prevent performance problems, do not
use propane/LP fuel tank of less than 100 lb.
capacity (propane/LP units only).
20. Provideadequateclearancesaroundairopen-
ings.
21. Solid fuels shall not be burned in a fireplace
in which an unvented room heater is installed.
23. Follow the clearance requirements within
this manual to assure adequate clearances
for accessibility for purposes of servicing and
proper operation.
24. Installation and the provisions for combustion
andventilationairmustconformwiththeNational
Fuel Gas Code, ANSI Z223.1/NFPA 54.
25. When installing as a vented appliance in a
manufactured home or mobile home, the in-
stallationmustconformwiththeManufactured
HomeConstructionandSafetyStandard,Title
24 CFR, Part 3280, or when applicable, with
Manufacture Home Installations Standard,
ANSI/NCBCS A225.1/NFPZ 501A.

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126839-01D 5
PRODUCT IDENTIFICATION
Figure 1 - 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
both realistic flames and glowing coals. This
heater is designed for vent-free operation
with flue damper closed. It has been tested
and approved to theANSI Z21.11.2 standard
for unvented heaters. State and local codes
in some areas prohibit the use of vent-free
heaters.This heater may also be operated as
LOCAL CODES NOTE:Donotpickupappliancebaseas-
semblybyburners.Thiscoulddamagethe
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.In theabsenceof 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
UNPACKING
1. Removelogsandappliancebaseassem-
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 exceed 36inches(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.
aventeddecorative (ANSI Z21.60)productby
opening the flue damper.
SAFETY DEVICE
Thisheaterhasapilotwithan 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.
PIEZO IGNITION SYSTEM
This heater has a piezo Igniter. This system
requires no matches, batteries or other
sources to light heater.
Six Piece Log Set
Piezo
Igniter
Flame Adjustment Knob
Base Assembly
Left Side
Front
Control Knob

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AIR FOR COMBUSTION AND VENTILATION
WARNING: This heater shall
notbeinstalledinaroomorspace
unless the required volume of
indoorcombustionairisprovided
by the method described in the
National Fuel Gas Code, ANSI
Z223.1/NFPA54,theInternational
FuelGasCode,orapplicablelocal
codes.Readthefollowinginstruc-
tions to ensure proper fresh air
for this and other fuel-burning
appliances in your home.
Today’s homes are built more energy efficient
thanever.New materials,increasedinsulation
and new construction methods help reduce
heat loss in homes. Homeowners apply
weather strip and caulk around windows and
doors to keepthe cold air out andthe warm air
in. During heating months, 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 (6 x 10
-11
kg per pa-sec-m
2
) 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 criteria
above,proceedtoDeterminingFresh-AirFlow
For Heater Location, Page 6.
Confined Space and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/
NFPA54 allows two methods for determining
whetherthespace inwhichthe heaterisbeing
installedisconfinedorunconfinedspace.The
standardmethoddefinesa confinedspaceas
a space whose volume is less than 50 cubic
feet per 1,000 Btu per hour (4.8 m
3
per 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
than50cubicfeetper1,000Btuperhour(4.8
m
3
per 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 HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Using the Standard
Method

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126839-01D 7
AIR FOR COMBUSTION AND VENTILATION
Continued
Use this work sheet to determine if you have
a confined or unconfined space.
Space: Includes the room in which you will
install heater plus any adjoining rooms with
doorless passageways or ventilation grills
between the rooms.
1. 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) = 2560 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: 2560 cu. ft. (volume of space) x 20
= 51,200 (maximum Btu/Hr the space can
support)
3. AddtheBtu/Hr ofall fuel-burningappliances
in the space.
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)
73,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the above example is a confined
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. Your
options are as follows:
A. Rework worksheet, adding the space of an
adjoining room. If the extra space provides
anunconfined space,remove doortoadjoin-
ing room or add ventilation grills between
rooms. See Ventilation Air From Inside
Building, Page 7.
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.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoiningunconfinedspace, youmustprovide
twopermanentopenings: onewithin12"ofthe
ceiling and one within 12" of the floor on the
wall connecting the two spaces (see options
1and2,Figure 2).Youcanalsoremovedoor
into adjoining room (see option 3, Figure 2).
Follow the National Fuel Gas Code, ANSI
40,000
33,000
73,000
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"

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NOTICE: State or local codes may
onlyallowoperationofthisappliance
inaventedconfiguration.Checkyour
state or local codes.
WARNING: If optional remote
control is used, make sure the se-
lector switch is in the OFF position
before installing heater.
WARNING: Before installing in
a solid fuel-burning fireplace, the
chimney flue and firebox must be
cleanedofsoot,creosote,ashesand
loose paint by a qualified chimney
cleaner.Creosotewilligniteifhighly
heated.Adirtychimneyflueandfire-
box may create and distribute soot
within the house. Inspect chimney
flue for damage. If damaged, repair
flue before operating heater.
WARNING:Anyoutsideairducts
and/or ash dumps in the fireplace
shallbepermanentlyclosedattime
of appliance installation.
WARNING: Seal any fresh air
ventsorashclean-outdoorslocated
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.
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
INSTALLATION
NOTICE: This appliance is in-
tendedforsupplementalheating.
Use this appliance along with
your primary heating system.
Do not install this heater as your
primaryheatsource.Ifyouhavea
central heating system, you may
run system’s circulating blower
while using appliance. This will
helpcirculatetheheatthroughout
thehouse.Intheeventofapower
outage, you can use this appli-
anceasyourprimaryheatsource.
WARNING: A qualified ser-
vice person must install appli-
ance. Follow all local codes.
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as, but
not limited to, tobacco smoke,
aromatic candles, cleaning flu-
ids,oilorkerosenelamps,etc.)in
the air exist, may discolor walls
or cause odors.
Z223.1/NFPA 54, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.
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.

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126839-01D 9
INSTALLATION
Continued
WARNING: Never install the
heater
• in a bedroom or bathroom
unless installed as a vented
appliance, see Page 11
• in a recreational vehicle
• where curtains, furniture,
clothing or other flammable
objects are less than 36"
from front and 42" from top
of heater; for side clearances
see Figure 4
• in high traffic areas
• in windy or drafty areas
IMPORTANT: Vent-free heaters add moisture
totheair.Although this is beneficial, installing
heater in rooms without enough ventilation
air may cause mildew to form from too much
moisture.SeeAir for CombustionandVentila-
tion, Page 6.
CHECK GAS TYPE
Use the correct gas type (natural or propane/
LP) for your unit. If your gas supply is not cor-
rect, do not install log set. Call dealer where
you bought log set for proper type fireplace.
WARNING:Thisapplianceis
equipped for either natural gas
or propane/LP gas but not both.
Gas type is indicated on the rat-
ingplate.Fieldconversionisnot
permitted.
INSTALLATION AND CLEARANCES
FOR VENT-FREE OPERATION
MINIMUM FIREPLACE CLEARANCE TO
COMBUSTIBLE MATERIALS
Side Wall 16", Ceiling 42", Front 36"
Carefullyfollowtheseinstructions.Thiswillensure
safe installation into a masonry, UL127-listed
manufacturedfireplaceorlistedvent-freefirebox.
Minimum Clearances For Side Combustible
Material, Side Wall and Ceiling
A. Clearances from the side of the fireplace
cabinettoanycombustiblematerialand wall
should follow diagram in Figure 4.
Example:The face of a mantel, bookshelf,
etc. is made of combustible material and
protrudes 3-1/2" from the wall. This com-
bustible material must be 4" from the side
of the fireplace cabinet (see Figure 4).
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".
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16 inches from Side Wall
Example
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.
NOTICE: Manual control appliances
may be used as a vented product. If
so,youmustalwaysrunappliancewith
chimney flue damper open. If running
appliance with damper open, non-
combustible material above fireplace
openingisnot needed. GotoInstalling
Damper Clamp Accessory (Required
For Vented Applications), Page 11.
WARNING: Maintain theminimum
clearances. Ifyou can,providegreater
clearances from floor, ceiling and
adjoining wall.
Maintain adequate clearances for accessibility for purposes
of servicing and proper operation.

SuperiorFireplaces.us.com 126839-01D10
Minimum
Noncombustible
Material
Minimum Non-
Combustible
Material Height
Distances to
Underside of
Mantel
Top of
Fireplace
Opening
Underside of
Mantel Shelf
Mantel Shelf
12"
8"
(A)
18"
8"
20"
14"
22"
17"
24"
20"
Log Set
24" Models
18" Model
2 ½"
6"
8"
10"
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Minimum Noncombustible Material
Clearances If Not Using Mantel
NOTE: If using a mantel proceed to If Using
Mantel. If not using a mantel, follow the infor-
mation on this page.
You must have noncombustible material(s)
above the fireplace opening. Noncombustible
materials(such asslate,marble,tile,etc.)must
beatleast1/2 inchthick.With sheetmetal,you
must have noncombustible material behind
it. Noncombustible material must extend at
least 8" up (for all models). If noncombustible
material is less than 12", you must install the
fireplacehoodaccessory (for allmodels).See
Figure 5 for minimum clearances.
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
musthavenoncombustiblematerialbehindit.
Noncombustiblematerialmustextend atleast
8inchesup(for allmodels).Ifnoncombustible
material is less than 12", you must install the
fireplace hood accessory (24" Models Only).
Even if noncombustible material is more than
12", you may need the hood accessory to
deflect heat away from your mantel shelf.
See Figures 5-7, Pages 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 11.
MANTEL CLEARANCES
In addition to meeting noncombustible mate-
rial clearances, you must also meet required
clearances between fireplace opening and
mantelshelf.Ifyoudonotmeettheclearances
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).
INSTALLATION
Continued
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Noncombustible
Material Distance
(A)
Requirements for Safe
Installation
12" or more Noncombustible material
okay.
Between 8" and
12" Install fireplace hood
accessory (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 heater
with flue damper open.
Minimum clearance requirements include any projections such
as shelves, window sills, mantels, etc. above the appliance.

SuperiorFireplaces.us.com
126839-01D 11
INSTALLATION
Continued
Minimum
Noncombustible
Material
8"
Min.
12" 15" 18" 20"
2½"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050)
Top of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
Figure 7 - Minimum Mantel Clearances
When Using Hood
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
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Hearth
5"
Min.
Combustible
Material
Determining Minimum Mantel Clearance
When Using a Hood
If minimum clearances in Figure 6, Page 10,
are not met, you must have a hood. When
using a hood there are still certain minimum
mantel clearances required. Follow minimum
clearances shown in Figure 7 when using
hood.
NOTICE: Surface temperatures
of adjacent walls and mantels
become hot during operation.
Walls and mantels above the
firebox may become hot to
the touch. If installed properly,
these temperatures meet the
requirement of the national
product standard. Follow all
minimum clearances shown in
this manual.
NOTICE:Ifyourinstallationdoes
not meet the minimum clear-
ances shown, you must do one
of the following:
• operate the logs only with the
flue damper open
• raise the mantel to an accept-
able height
• remove the mantel
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.

SuperiorFireplaces.us.com 126839-01D12
INSTALLING HEATER BASE
ASSEMBLY
WARNING:Youmust 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.
INSTALLATION
Continued
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.
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
See chart for minimum permanent flue open-
ingyoumust provide.Attach damperclampso
the minimum permanent flue opening will be
maintained at all times.
WARNING: If installing in a
sunken fireplace, special care
is needed. You must raise the
fireplace floor to allow access to
heatercontrolpanel.Thiswillen-
sureadequateairflowand guard
against sooting and controls
being damaged. Raise fireplace
floor with noncombustible mate-
rial.Makesurematerialissecure.
CAUTION: Do not pick up
heater base assembly by burn-
ers. This could damage heater.
Only handle base assembly by
grates.
IMPORTANT: Make sure the heater burners
are level. If heater is not level, heater will not
work properly.
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. Connect approved flexible gas hose to
gas control fitting in heater (see Figure
11, Page 13).
IMPORTANT:Holdgasfitting withwrench
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 16-21).
5. Centerheaterbaseandlogs 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.

SuperiorFireplaces.us.com
126839-01D 13
8. Remove heater base from fireplace. If
installing optional control accessories,
do so at this time. Follow all directions
provided with accessory.
9. Drillholesatmarkedlocations using3/16"
drill bit.
10. Attach base assembly to fireplace floor
using two masonry screws (in hardware
package).
Figure 11 - Attaching Flexible Gas Hose
to Heater
Flexible Gas
Hose (if allowed
by local codes)
Fitting
INSTALLATION
Continued
Figure 12 - Attaching Base to Fireplace
Floor
Masonry
Screw
Mounting
Bracket
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection
to the pressure regulator.
WARNING:Aqualifiedservice
person must connect heater to
gassupply.Followalllocalcodes.
CAUTION: Never connect
propane/LP appliance directly
to the propane/LP supply. This
heaterrequiresanexternalregu-
lator (not supplied). Install the
external regulator between the
heater and propane/LP supply.
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

SuperiorFireplaces.us.com 126839-01D14
* 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
INSTALLATION
Continued
WARNING: Never connect
natural gas appliance to private
(non-utility) gas wells. This gas
iscommonlyknownaswellhead
gas.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of
1/2"diameterorgreatertoallow
proper gas volume to heater. If
pipe is too small, undue loss of
volume will occur.
Installationmustincludean 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.
WARNING: Use pipe joint
sealantthatisresistanttoliquid
petroleum (LP) gas.
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 keeps themfromgoinginto heater
controls. If sediment trap is not installed or is
installed wrong, heater may not run properly.
CHECKING GAS CONNECTIONS
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.
Applyanoncorrosiveleakdetec-
tion fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Avoid damage to
gascontrol.Holdgasfittingwith
wrench when connecting it to
gas piping and/or fittings.

SuperiorFireplaces.us.com
126839-01D 15
INSTALLATION
Continued
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
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply
and heater. See guidelines un-
der Connecting to Gas Supply,
Page 13.
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. Capoffopenendofgas pipewhereequip-
ment shutoff valve was connected.
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.
PRESSURE TESTING HEATER 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 22).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, Page 23).
Figure 17 - Checking Gas Joints (Natural
Gas Only)
Gas Meter
Gas Control Valve
Location
Equipment
Shutoff Valve

SuperiorFireplaces.us.com 126839-01D16
Figure 18 - Installing Rear and Middle Logs
Rear Log
Burner
Pin for
Hole in
Bottom
of Log
Center Log
Figure 19 - Installing Front Log
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
WARNING:Failuretoposition
thepartsinaccordancewiththese
diagrams or failure to use only
parts specifically approved with
thisheatermayresultinproperty
damage or personal injury.
CAUTION: After installa-
tion and periodically thereafter,
check to ensure that no flame
comes in contact with any log.
With the heater set to HI, check
toseeifflamescontactanylog.If
so,repositionlogsaccordingto
the log installation instructions
in this manual. Flames contact-
ing logs will create soot. 4. Place left crossover log as shown in Fig-
ure20,Page 17.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 17.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 17. 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.

SuperiorFireplaces.us.com
126839-01D 17
INSTALLATION
Continued
Figure 20 - Installing Left, Center and
Right Crossover Logs
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
bottomoflogmustseatover pins on base
as shown in Figure 21.
2. Place middle log (#2) onto base. Holes in
bottomoflogmustseatover pins on base
as shown in Figure 21.
Figure 21 - Installing Rear and Middle
Logs
Burner
Middle Log Rear Log
Pin for
Hole in
Bottom
of Log
Figure 22 - Installing Front Log
Figure 23 - Installing Left and Right Logs
Front Log
Grate
Left Top
Log
Square Peg
on Rear Log
Right
Top
Log
Round
Peg on
Front Log
3. Place front log (#3) onto grate as shown
in Figure 22.
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)asshown inFigure
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 126839-01D18
LVD18CH AND LVD24CH
Itisveryimportantto install these logsexactly
as instructed. Do not modify logs. Only use
logs supplied with heater.
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
Figure 26 - Installing Front Log
Figure 27 - Installing Top Right Log
Figure 25 - Installing Middle Log
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 27.
4. Place the top right log onto the rear,
middleandfront logsasshownin Figure
27. The rear, middle and front logs has
notches for the top right log to set into.
You may havetomovethefrontlogfrom
left to right to get it to line up with the
top right log.
Rear Log
Middle Log
Burner
Grate
Pin for Hole
in Bottom of
Log
Pin for
Hole in
Bottom of
Log
Middle Log
Burner
Top Right Log
Middle
Log
Front Log
Rear Log
Log
Notch

SuperiorFireplaces.us.com
126839-01D 19
INSTALLATION
Continued
Figure 28 - Installing Middle Log
Figure 29 - Installing Top Left Log
Figure 30 - Final assembly
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.
Top Middle
Log
Log
Notch
Log Notch
Front Log
Notch
Middle
Log
Rear Log
Top Left Log
Middle Log

SuperiorFireplaces.us.com 126839-01D20
INSTALLATION
Continued
LDV18CO AND LDV24CO
Itisveryimportantto install these logsexactly
as instructed. Do not modify logs. Only use
logs supplied with this appliance.
1. Align the holes in the bottom of the rear
log (#1) over the rear locating pins, and
gently adjust down until it is fully seated
(see Figures 31 and 32).
Figure 31 - Locating Pins
Figure 32 - Install Rear Log
2. Aligntheholesinthe bottomofthemiddle
log(#2)overthe middlelocatingpins,and
gently adjust down until it is fully seated
(see Figures 31 and 33).
Figure 33 - Install Middle Log
3. Align the notches in the front left log (#3)
against the three corresponding grates
as shown in Figure 34.
4. Align the notch in the front right log (#4)
against the far right grate as shown in
Figure 35.
Figure 34 - Install Front Left Log
Figure 35 - Install Front Right Log
Locating Pins for
Rear Log
Locating Pins for
Middle Log
Grate
Front Left Log
3
Front Right Log
4
Rear
Log
1
Middle Log
2