Superior VF18NBTB, VF18PBTB, VF24NBTB, VF24PBTB Installation And Operation Instruction Manual

Installation and Operation Instructions

PFS

US

Superior™ Unvented (Vent-Free) Gas Log Heater

P/N 126857-01 Rev. A 02/2014

P126857-01

Models

®

VF18NBTB VF18PBTB VF24NBTB VF24PBTB

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: If the information in these instructions is not followed exactly, a fire or explosion may result

causing property damage, personal injury or loss of life.

— 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.

• 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.

TABLE OF CONTENTS

Safety .................................................................. 2

Product Identication ........................................... 5

Local Codes......................................................... 5

Optional Remote Control Accessories ................. 5

Unpacking............................................................ 5

Product Features ................................................. 6

Air For Combustion and Ventilation ..................... 6

Installation ........................................................... 8

Operation ........................................................... 16

Inspecting Burners ............................................ 19

SAFETY

Cleaning and Maintenance ................................ 20

Troubleshooting ................................................. 21

Specications .................................................... 25

Wiring Diagram .................................................. 25

Service Hints ..................................................... 25

Technical Service............................................... 25

Replacement Parts ............................................ 25

Parts .................................................................. 26

Accessories ....................................................... 28

Warranty ............................................................ 30

WARNING: Improper

installation, adjustment,
alteration, service or
maintenance can cause
injury or property dam­age. Refer to this manual
for correct installation
and operational proce­dures. For assistance or
additional information
consult a qualified in­staller, service agency or
the gas supplier.

WARNING: This ap-

pliance is for installation
only in a solid-fuel burning
masonry or UL127 factory-

built replace or in a listed

ventless firebox enclo-

sure. It is design-certied

for these installations in
accordance with ANSI
Z21.11.2. Exception: DO
NOT install this appliance

in a factory-built replace

that includes instructions
stating it has not been test­ed or should not be used
with unvented gas logs.

WARNING: This is an

unvented gas-red 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
section on page 6 of this
manual.

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.

* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer

SAFETY

Continued

WARNING: This product con­tains and/or generates chemicals
known to the State of California
to cause cancer or birth defects
or other reproductive harm.

IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble,
operate or service this heater.
Improper use of thisz heater can
cause serious injury or death
from burns, fire, explosion,
electrical shock and carbon
monoxide poisoning.

DANGER: Carbon monoxide
poisoning may lead to death!

Carbon Monoxide Poisoning: Early signs of

carbon monoxide poisoning resemble the u,
with headaches, dizziness or nausea. If you
have these signs, the replace may not be

working properly. Get fresh air at once! Have
replace serviced. Some people are more af­fected by carbon monoxide than others. These

include pregnant women, people with heart or
lung disease or anemia, those under the inu-

ence of alcohol and those at high altitudes.
Natural and Propane/LP gases: Natural and

Propane/LP gases are odorless. An odor­making 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 replace.

WARNING: Vent-free products
are prohibited for bedroom and
bathroom installation in the Com­monwealth of Massachusetts.

WARNING: Do not allow fans
to blow directly into the heater.
Avoid any drafts that alter burner

ame patterns. Ceiling fans can

create drafts that alter burner

ame patterns. Altered burner

patterns can cause sooting.

WARNING: Do not place
log scraps or lava rocks on
burner.

Due to high temperatures, the
appliance should be located out

of trafc and away from furniture

and draperies.

Do not place clothing or other

ammable material on or near

the appliance. Never place any
objects on the heater.

Heater base assembly becomes
very hot when running heater.
Keep children and adults away
from hot surface to avoid burns
or clothing ignition. Heater
will remain hot for a time after
shutdown. Allow surface to cool
before touching.

WARNING: Any change to
this heater or its controls can
be dangerous.

WARNING: Do not use a
blower insert, heat exchanger
insert or other accessory not ap­proved for use with this heater.

Carefully supervise young chil­dren when they are in the room
with heater. When using the hand­held remote accessory, keep se­lector switch in the OFF position
to prevent children from turning
on burners with remote.

SAFETY

You must operate this heater

with a replace doors or screen

in place and fully closed. Un­less provided by other means,
screens shall have openings for
introduction of combustion air.

Keep the appliance area clear
and free from combustible ma­terials, gasoline and other am­mable vapors and liquids.

1. 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.

2.

Do not place propane/LP supply tank(s) inside
any structure. Locate propane/LP supply
tank(s) outdoors (propane/LP units only).

3. 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 re department

4. This heater shall not be installed in a
bedroom or bathroom unless installed
as a vented appliance. See Installing

Damper Clamp Accessory for Vented
Operation, page 12.

5.

Before installing in a solid fuel burning re­place, the chimney ue and rebox must
be cleaned of soot, creosote, ashes and
loose paint by a qualied chimney cleaner.

Creosote will ignite if highly heated. A dirty

chimney ue may create an distribute soot
within the house. Inspect chimney ue for
damage. If damaged, repair ue before

operating heater.

6. Do not burn solid fuel in a masonry or

UL127 factory-built replace in which a

vent-free room heater is installed.

7.

If replace has glass doors, never operate

this heater with glass doors closed. Any
glass door shall be fully opened when the
appliance is in operation. If you operate

heater with doors closed, heat buildup
inside replace will cause glass to burst.

Make sure there are no obstructions across

openings of replace.

8. To prevent the creation of soot, follow the

instructions in Cleaning and Maintenance,
page 20.

9. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater
off. If heated, the vapors from these prod-

ucts may create a white powder residue
within burner box or on adjacent walls or
furniture.

10. This heater needs fresh, outside air ven­tilation to run properly. This heater has an
oxygen depletion sensing (ODS) pilot light
safety 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 21.

11. Do not run heater

• where ammable liquids or vapors are

used or stored

• under dusty conditions

12. Do not use this heater to cook food or burn
paper or other objects.

13. Do not use heater if any part has been
exposed to or under water. Immediately

call a qualied 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.

14. Do not operate heater if any log is broken.
Do not operate heater if a log is chipped

(dime-sized or larger).

15. Turn heater off and let cool before servic­ing or repairing. Make sure the selector
switch is in the OFF position. Only a quali-

ed service person should install, service

or repair heater.

16. Make sure selector switch is in the OFF
position when you are away from home
for long periods of time.

17. This heater does not need to be con­nected to any external electrical source.

18. To prevent performance problems, do not

use propane/LP fuel tank of less than 100
lb. capacity (propane/LP units only).

19. Provide adequate clearances around air
openings.

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126857-01A4

PRODUCT IDENTIFICATION

LEFT
SIDE

Log Set
Assembly

Electronic
Ignitor

Control
Knob

Chassis
Assembly

Flame
Adjustment
Knob

Selector
Switch

Hand-Held

FRONT

Remote
Receiver

RIGHT
SIDE

Remote Control

Figure 1 - Product Identication

State of Massachusetts: The installation must be made by a licensed plumber or gas

tter in the Commonwealth of Massachusetts.
Sellers of unvented propane or natural gas-red supplemental room heaters shall pro-

vide to each purchaser a copy of 527 CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for bedroom and bathroom installation in the Com-

monwealth of Massachusetts.

Install and use heater with care. Follow all

LOCAL CODES

local codes. In the absence of local codes,

use the latest edition of The National Fuel
Gas Code ANSI Z223.1/NFPA 54*.

*Available from:

American National Standards Institute, Inc.

National Fire Protection Association, Inc.

1430 Broadway

New York, NY 10018

Batterymarch Park

Quincy, MA 02269

REMOTE CONTROL

There are two optional remote accessories
that come standard:

• wall switch

• hand-held ON/OFF remote

See Accessories, page 26.

126857-01A 5

www.SuperiorFireplaces.US.com

data plates from the grate as­sembly. The data plates contain
important warranty and safety
information.

1. Remove log set assembly from carton.

2. Remove control cover oor media compo-

3. Remove all protective packaging applied

4. Check heater for any shipping damage.

UNPACKING

CAUTION: Do not remove the

Note: Do not pick up assembly by logs.
This could damage heater. Always handle
assembly by grate.

nents.

to log set for shipment.

If heater is damaged call INNOVATIVE
HEARTH PRODUCTS at 1-800-655-2008
for replacement parts before returning to
dealer.

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

ames and glowing ceramic logs/coals. This

heater is designed for vent-free operation with

ue damper closed. It has been tested and

approved to ANSI 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 a vented
decorative (ANSI Z21.60) product by opening

the ue damper.

AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall
not be installed in a room or space
unless 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 lo-

cal codes. Read the following in­structions to insure proper fresh
air for this and other fuel-burning
appliances in your home.

Today’s homes are built more energy efcient
than ever. New materials, increased insulation

and new construction methods help reduce
heat loss in homes. Home owners weather
strip and caulk around windows and doors
to keep the cold air out and the warm air in.

During heating months, home owners want

their homes as airtight as possible.
While it is good to make your home energy

efcient, your home needs to breathe. Fresh

air must enter your home. All fuel-burning ap­pliances need fresh air for proper combustion
and ventilation.

Exhaust fans, replaces, clothes dryers and

fuel burning appliances draw air from the house
to operate. You must provide adequate fresh
air for these appliances. This will insure proper
venting of vented fuel-burning appliances.

PROVIDING ADEQUATE
VENTILATION

The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation.

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SAFETY DEVICE

This heater has a pilot with an Oxygen Deple­tion Sensing (ODS) safety shutoff system. 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.

ELECTRONIC IGNITION SYSTEM

This system has an electronic ignitor. This sys­tem requires no matches or other sources to
light heater. Receiver requires 4 AA batteries

(included), hand-held remote control requires

a 12-volt battery and a 3-volt button cell bat­tery for the LCD display (both included).

All spaces in homes fall into one of the three

following ventilation classications:

1. Unusually Tight Construction

2. Unconned Space

3. Conned Space

The information on pages 6 through 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 combus-

tion and ventilation. However, in buildings of
unusually tight construction, you must provide

additional fresh air.

Unusually tight construction is dened 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
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 oors, between wall-ceiling joints,

between wall panels, at penetrations
for plumbing, electrical and gas lines
and at other openings.

If your home meets all of the three criteria
above, you must provide additional fresh air.
See Ventilation Air From Outdoors, page 8.

If your home does not meet all of the
three criteria above, proceed to Determin-
ing Fresh-Air Flow For Heater Location,
page 7.

-11

kg per pa-sec-m2) or less

126857-01A6

AIR FOR COMBUSTION AND VENTILATION

Continued

Conned and Unconned Space

The National Fuel Gas Code, ANSI Z223.1/
NFPA 54 denes a conned space as a space

whose volume is less than 50 cubic feet per

1,000 Btu per hour (4.8 m3 per kw) of the ag-

gregate input rating of all appliances installed in

that space and an unconned space as a space

whose volume is not less than 50 cubic feet per

1,000 Btu per hour (4.8 m3 per kw) of the ag-

gregate input rating of all appliances installed in
that space. Rooms communicating directly with

the space in which the appliances are installed*,
through openings not furnished with doors, are
considered a part of the unconned space.

* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.

DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION

Determining if You Have a Conned or
Unconned Space

Use this work sheet to determine if you have

a conned or unconned 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).

Length x Width x Height =__________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 sup-

plied 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. Add the Btu/Hr of all fuel burning appliances

Vent-free replace _________ Btu/Hr
Gas water heater* _________ Btu/Hr
Gas furnace _________ Btu/Hr
Vented gas heater _________ Btu/Hr
Gas replace logs _________ Btu/Hr
Other gas appliances* + ________ Btu/Hr
Total = _________ Btu/Hr

126857-01A 7

)

in the space.

www.SuperiorFireplaces.US.com

* 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 replace  _________ Btu/Hr
Total = _________ Btu/Hr

4. Compare the maximum Btu/Hr the space

can support with the actual amount of Btu/

Hr used.
_______

port)
________

used)
Example: 51,200 Btu/Hr (maximum the

73,000 Btu/Hr (actual amount of

The space in the above example is a conned

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

adjoining room. If the extra space provides

an unconned space, remove door to adjoin-

ing room or add ventilation grills between

rooms. See Ventilation Air From Inside

Building, page 8.
B. Vent room directly to the outdoors. See

Ventilation Air From Outdoors, page 8.

C. Install a lower Btu/Hr replace, if lower Btu/

Hr size makes room unconned.

If the actual Btu/Hr used is less than the maxi-

mum Btu/Hr the space can support, the space is
an unconned space. You will need no additional

fresh air ventilation.

Btu/Hr (maximum the space can sup-

Btu/Hr (actual amount of Btu/Hr

space can support)

Btu/Hr used)

40,000
33,000
73,000

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 Internation-
al Fuel Gas Code, or applicable

local codes.

AIR FOR COMBUSTION AND VENTILATION

Outlet
Air

Ventilated
Attic

Outlet
Air

Inlet
Air

Inlet Air

Ventilated

Crawl Space

To
Crawl
Space

To Attic

Or

Remove
Door into
Adjoining

Room,
Option

3

Ventilation Grills

Into Adjoining Room,

Option 2

Ventilation

Grills

Into Adjoining

Room,

Option 1

12"

12"

Continued

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining un-

conned space. When ventilating to an adjoining
unconned space, you must provide two perma-

nent openings: one within 12" of the ceiling and

one within 12" of the oor 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). Follow the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, Air
for Combustion and Ventilation for required

size of ventilation grills or ducts.

Figure 2 - Ventilation Air from Inside Building

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma­nent openings: one within 12" of the ceiling

and one within 12" of the oor. 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.

Figure 3 - Ventilation Air from Outdoors

INSTALLATION

NOTICE: This heater is intended
for use as supplemental heat.
Use this heater along with your
primary heating system. Do not
install this heater as your pri­mary heat source. If you have a
central heating system, you may
run system’s circulating blower
while using heater. This will help
circulate the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.

vice person must install heater.
Follow all local codes.

WARNING: A qualied ser-

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NOTICE: State or local codes may
only allow operation of this appli-

ance in a vented conguration.

Check your state or local codes.

WARNING: Make sure the
selector switch is in the OFF po­sition before installing heater.

WARNING: Seal any fresh
air vents or ash clean-out doors
located on oor or wall of re­place. If not, drafting may cause
pilot outage or sooting. Use a
heat-resistant sealant. Do not

seal chimney ue damper.

126857-01A8

INSTALLATION

Continued

WARNING: Before installing

in a solid fuel burning replace,
the chimney ue and rebox

must be cleaned of soot, creo­sote, ashes and loose paint by
a qualified chimney cleaner.
Creosote will ignite if highly

heated. A dirty chimney ue may

create and distribute soot within
the house. Inspect chimney and

rebox ue for damage. If dam­aged, repair ue and rebox

before operating heater.

CHECK GAS TYPE

Use correct gas type (natural or propane/LP)

for your unit. If your gas supply is not correct,
do not install replace. Call dealer where you
bought replace for proper type replace.

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.

INSTALLATION AND CLEARANCES
FOR VENT-FREE OPERATION

WARNING: Never install the

heater

• in a bedroom or bathroom un­less installed as a vented unit,
see page 12

• in a recreational vehicle

• where curtains, furniture, cloth­ing or other ammable objects

are less than 42" from the front,
top or sides of the heater

• in high trafc areas

• in windy or drafty areas

CAUTION: This heater cre­ates warm air currents. These
currents move heat to wall sur­faces 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 u­ids, oil or kerosene lamps, etc.) in
the air exist, may discolor walls
or cause odors.

IMPORTANT: Vent-free heaters add moisture

to the air. Although this is benecial, installing

heater in rooms without enough ventilation
air may cause mildew to form from too much
moisture. See Air for Combustion and Ventila-

tion, page 6.

126857-01A 9

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WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from

oor, ceiling and adjoining wall.

MINIMUM FIREPLACE CLEARANCE TO

COMBUSTIBLE MATERIALS

Side Wall 16", Ceiling 42"

Floor 5", Front: 36"

LOG SIZING REQUIREMENTS

Minimum Firebox Size Center

Log Size Height Depth

18" 17" 14" 24" 20"
24" 17" 14" 28" 22"

*Measured at 14" depth

Carefully follow the instructions below. This

will ensure safe installation into a masonry,
UL127-listed manufactured replace or listed
vent-free rebox enclosure.

Minimum Clearances For Side Combustible
Material, Side Wall and Ceiling

A. Clearances from the side of the replace

cabinet to any combustible material and

wall should follow diagram in Figure 4,

page 10.

Example: The face of a mantel, bookshelf,

etc. is made of combustible material
and protrudes 3 1/2" from the wall. This
combustible material must be 4" from the

side of the replace cabinet (see Figure
4, page 10).

Any outside air ducts and/or ash dumps

in the replace shall be permantly closed

at the time of appliance installation.

Front
Width

Rear*
Width

INSTALLATION

Heat Resistant
Material

(A)

Continued

Note: When installing your gas logs into

a manufactured rebox, follow rebox

manufacturer’s instructions for minimum
clearances to combustible materials.

B. Clearances from the top of the replace

opening to the ceiling should not be less
than 42".

NOTICE: Nonther mostat control
heaters may be used as a vented
product. If so, you must always

run heater with chimney ue

damper open. If running heater
with damper open, noncombus-

tible material above replace

opening is not needed. Go to

Installing Damper Clamp Ac­cessory for Vented Operation,

page 12.

Example

Noncombustible
Material Distance
(A)

1

2" or more Noncombustible mate-

Between 8" and 12"

Less than 8"

Requirements for
Safe Installation

rial OK.
24" or 30" Models:

Install replace hood
accessory (GA6050,

GA6052 or GA6053 see

Accessories, page 26).

18" Model: Noncom­bustible material OK.

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 ue damper open.

*

*Minimum 16" from Side Wall

Figure 4 - Minimum Clearance for

Combustible to Wall

Minimum Noncombustible Material
Clearances

If Not Using Mantel

Note: If using a mantel proceed to If Using
Mantel. If not using a mantel, follow these
instructions.

You must have noncombustible material(s)

above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.) must
be at least 1/2" thick. With sheet metal, 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
replace hood accessory (24" Model Only).

See Figure 5 for minimum clearances.

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Figure 5 - Heat Resistant Material (Slate,

Marble, Tile, etc.) Above Fireplace

If Using Mantel

You must have noncombustible material(s)

above the replace opening. Noncombus­tible materials (such as slate, marble, tile,

etc.) must be at least 1/2" thick. With sheet
metal, 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 replace hood accessory (24"

Model Only). Even if noncombustible material

is more than 12", you may need the hood ac­cessory to deect heat away from your mantel
shelf. See Figure 5 and Figures 6 and 7, page
11, for minimum clearances.

IMPORTANT: If you cannot meet these mini-

mum clearances, you must operate heater
with chimney ue damper open. Go to Install-

ing Damper Clamp Accessory for Vented
Operation, page 12.

126857-01A10