Desa SBJ18VNA User Manual
UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
MODELS
SBJ18VNA, SBJ18VPA
SBJ24VNA AND
SBJ24VPA
ANSI Z21.11.2a-2003 and ANSI Z21.60-2003 APPROVED
Vent-free Models Also Design-Certified As Vented Decorative Appliances
SMA18VNA, SMA18VPA
MODELS
SMA24VNA AND
SMA24VPA
WARNING: If the information in this manual 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 va-
pors 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 quali-
fied installer, service agency or the gas supplier.
Save this manual for future reference.
For more information, visit www.desatech.com
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 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.
WARNING: 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.
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
TABLE OF CONTENTS
Safety Information ............................................... 3
Product Identification ...........................................
Local Codes ........................................................ 5
Unpacking ........................................................... 5
Optional Remote Control Accessories .................
Product Features ................................................. 5
Air For Combustion and Ventilation .....................
Installation ........................................................... 8
Operating Heater ............................................... 16
Inspecting Burner .............................................. 20
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Wiring Diagram .................................................. 20
5
Cleaning and Maintenance ................................ 21
Troubleshooting .................................................
Specifications ....................................................
5
Replacement Parts ............................................ 26
Service Hints ..................................................... 26
Technical Servi
6
Accessories ....................................................... 27
Illustrated Parts Breakdown and Parts List ....... 28
Warranty Information ...........................
ce .............................................. 26
Back Cover
114744-01C
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26
SAFETY INFORMATION
WARNING: This product
contain s and/or ge nerates
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 log set.
Improper use of this log set 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 flu, with
headaches, dizziness or nausea. If you have these
signs, the log set may not be working properly.
Get fresh air at once! Have log set 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 influence of alcohol and those at high
altitudes.
Natural and Propane/LP Gas: Natural and Pro-
pane/LP gas 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 log set.
WARNING: Any change to
this log set 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 appliance.
WARNING: This appliance is
equipped with (natural or propane/LP) gas. Field conversion
is not permitted.
WARNING: Do not allow fans
to blow directly into the fireplace.
Avoid any drafts that alter burner
flame patterns. Ceiling fans can
create drafts that alter burner
flame 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 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 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.
Carefully supervise young children when they are in the room
with appliance. When using the
hand-held remote accessory,
keep selector switch in the OFF
position to prevent children from
turning on burner with remote.
You must operate this heater
with a fireplace screen in place.
Make sure fireplace screen is
closed before running heater.
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SAFETY INFORMATION
Continued
Keep the appliance area clear
and free from combustible materials, gasoline and other flam
mable vapors and liquids.
Solid fuels shall not be burned in
a fireplace in which an unvented
room heater installed.
Children and adults should be
alerted to the hazard of high temperature and should stay away to
avoid burns or clothing ignition.
1. This appliance, as supplied, 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) in
side the 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
neighborʼs phone. Follow the gas supplierʼs
instructions
• if you cannot reach your gas supplier, call
the fire department
4. This heater shall not be installed in a bedroom
or bathroom, unless installed as a vented appli
ance. See Installing Damper Clamp Accessory
for Vented Operation, page 12.
5. 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 ignite if highly
heated. Inspect chimney flue for damage. If dam
aged, repair flue before operating appliance.
6. If fireplace has glass doors, never operate with
glass doors closed, If you operate heater with
doors closed, heat buildup inside fireplace will
cause glass to burst. Also if fireplace opening
has vents at the bottom, you must open the
vents before operating heater.
7. To prevent the creation of soot, follow the instruc
tions in Cleaning and Maintenance, page 21.
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8. 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 the burner
box or on adjacent walls and furniture.
9. This heater needs fresh, outside air ventilation
to run properly this heater has an Oxygen De
pletion Sensing (ODS) safety shutoff system.
The ODS shuts down the heater if enough fresh
air is not available. See Air Combustion and
Ventilation page 6. If the heater keeps shutting
off, see Troubleshooting, page 22.
10. Do not run heater
• where flammable liquids or vapors are used
or stored
• under dusty conditions
11. Do not use heater to cook food or burn paper
or other objects.
12. Do not use heater if any part has been exposed
to or 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.
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13. Do not operate heater if any log is broken. Do
not operate heater if a log is chipped (dimesize or larger).
14. Turn heater off and let cool before servicing,
installing or repairing. Make sure the selector
switch is in the OFF position. Only a quali
fied service person should install, service or
repair heater.
15. Make sure the selector switch is in the OFF
position when you are away from home for
long periods of time.
16. Remote-ready heaters shall not be connected
to any external electrical source.
17. Operating heater above elevations of 4,500
feet may cause pilot outage.
18. To prevent performance problems, do not use
propane/LP tank(s) of less than 100 lb. capac
ity (propane/LP units only).
19. Prov ide adequat e clea rances around air
openings.
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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.
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114744-01C
PRODUCT
IDENTIFICATION
Log Set
Piezo
Ignitor
Control
Knob
Figure 1 - Product Identification
Flame
Adjustment
Knob
Chassis
Assembly
LOCAL CODES
Install and use the heater with care. Follow all
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.
Note: Where listed vented decorative logs are
required, thermostat operations is not permitted.
The installation of appliances designed for manu
factured home (U.S. only) or mobile home instal
lation must conform with the Standard CAN/CSA
Z240 MH, Standard, Title 24 CFR, Part 3280, in
the United States or when such a standard is not
applicable, ANSI/NCSBCS A225.1/NFPA 501A
Manufactured Home Installations Standard.
State of Massachusetts: The installation
must be made by a licensed plumber or
gas fitter in the Commonwealth of Mas
sachusetts.
Sel lers of unvented propane or natur al
gas-fired supplemental room heaters shall
provide 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
Commonwealth of Massachusetts.
1430 Broadway
New York, NY 10018
Battery march park
Quincy, MA 02269
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UNPACKING
CAUTION: Do not remove the
data plates from the grate assembly. The data plates contain
important warranty and safety
information.
1. Remove log set ass emb ly from carton.
Note: Do not pick up assembly by logs. This
could damage the unit. Always handle assembly by grate.
2. Remove all protective packaging applied to log
set for shipment.
3. Check all items for any shipping damage. If
damaged, promptly inform dealer where you
bought appliance.
OPTIONAL REMOTE
CONTROL ACCESSORIES
There are four optional remote controls that can
be purchased separately:
Wall switch Hand-held ON/OFF remote
Wall thermostat Hand-held thermostat remote
See Accessories, page 27.
The wall thermostat or hand-held thermostat may not
be used where vented decorative listings is required.
PRODUCT FEATURES
OPERATION
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This heater is clean burning. It requires no outside
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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 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 flue damper.
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion Sensing (ODS) safety shut off 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.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system requires no matches, batteries or other sources to
light heater.
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AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in confined
space or unusually tight construction unless provisions are
provided for adequate combustion and ventilation air. Read the
following instructions to insure
proper fresh air for this and
other fuel-burning appliances
in your home.
Todayʼs homes are built more energy efficient
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 effi
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, fireplaces, 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, Section 5.3,
Air for Combustion and Ventilation.
All spaces in homes fall into one of the three fol
lowing ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined 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 combustion and
ventilation. However, in buildings of unusually
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
less with openings gasketed or sealed
and
b. weather stripping has been added on
openable windows and doors
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 of the three
criteria above, you must provide ad
ditional fresh air. See Ventilation Air
From Outdoors, page 6.
If your home does not meet all of the three
criteria above, proceed to Determining
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Fresh-Air Flow For Appliance Location
Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/NFPA
54 defines a confined space as a space whose vol
ume is less than 50 cubic feet per 1,000 Btu per hour
(4.8 m3 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 than 50
cubic feet per 1,000 Btu per hour (4.8 m3 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 openings not furnished with doors, are
considered a part of the unconfined space.
* Adjoining rooms are communicating only if
there are odorless passageways or ventilation grills
between them.
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kg per pa-sec-m2) or
DETERMINING FRESH-AIR FLOW
FOR APPLIANCE LOCATION
Determining if You Have a Confined or
Unconfined Space
Use this work sheet to determine if you have a
confined or unconfined space.
Space: Includes the room in which you will install
appliance plus any adjoining rooms with door
less passageways or ventilation grills between
the rooms.
and
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114744-01C
AIR FOR COMBUSTION
AND VENTILATION
Continued
1. Determine the volume of the space (length x
width x height).
Length x Width x Height = _________
(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 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 =
(Maximum 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. Add the Btu/Hr of all fuel burning appliances
in the space.
Vent-free appliance
Gas water appliance*
Gas furnace
Vented gas appliance
Gas fireplace logs
Other gas appliances* +
Total =
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
Gas water appliance
Vent-free appliance +
Total =
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)
_________Btu/Hr
_________Btu/Hr
_________Btu/Hr
_________Btu/Hr
_________Btu/Hr
_________Btu/Hr
_________Btu/Hr
40,000
_________Btu/Hr
33,000
_________Btu/Hr
73,000
_________Btu/Hr
cu. ft.
The space in the previous 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
adjoining room. If the extra space provides an
unconfined space, remove door to adjoining
room or add ventilation grills between rooms.
See Ventilation Air From Inside Building.
B. Vent room directly to the outdoors. See Ven
tilation Air From Outdoors,
C. Install a lower Btu/Hr appliance, if lower
Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the
maximum Btu/Hr the space can support, the
space is an unconfined space. You will need
no additional fresh air ventilation.
page 8.
WARNING: If the area in which
the appliance may be operated
is smaller than that defined as
an unconfined space or if the
building is of unusually tight
construction, provide adequate
combustion and ventilation air
by one of the methods described
in the National Fuel Gas Code,
ANSI Z223.1/NFPA 54 Section 5.3
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 adjoining
unconfined space, you must provide two permanent openings: one within 12" of the ceiling and
one within 12" of the floor on the wall connecting
the two spaces (see options 1 and 2, Figure 2 on
page 8). You can also remove door into adjoining
room (see option 3, Figure 2). Follow the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, Section
5.3, Air for Combustion and Ventilation for re-
quired size of ventilation grills or ducts.
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114744-01C 7
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AIR FOR COMBUSTION
Outlet
Air
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air
Ve
ntilated
Crawl Space
To
Crawl
Space
To Attic
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option
2
Ve
ntilation
Grills
Into Adjoining
Room,
Option 1
12"
12"
AND VENTILATION
Continued
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
heating 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 event of a power outage, you can use this heater as
your primary heat source.
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 floor. 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,
Section 5.3, 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 thermostatcontrolled power vent. Heated air entering the attic
will activate the power vent.
Figure 3 - Ventilation Air from Outdoors
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WARNING: A qualified service person must install heater.
Follow all local codes.
NOTICE: State or local codes may
only allow operation of this appliance in a vented configuration.
Check your state or local codes.
WARNING: Make sure the
selector 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 cleaned of soot, creosote, ashes and loose paint by a
qualified chimney cleaner. Creo
sote will ignite if highly heated. A
dirty chimney flue may create and
distribute soot within the house.
Inspect chimney flue for damage.
If damaged, repair flue damper
before operating appliance.
114744-01C
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INSTALLATION
Continued
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: Never install
the heater
• in a bedroom or bathroom
unless installed as a vented
appliance, see page 12
• in a recreational vehicle
•
where curt ains, furn iture,
clothing or other flammable objects are less than 42" from the
front, top or sides of heater
• in high traffic 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 fluids, 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 beneficial, installing heater
in rooms without enough ventilation air may cause
mildew to form from too much moisture. See Air
for Combustion and Ventilation
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP) for
your unit. If your gas supply is not correct, do not
install in fireplace. Call dealer where you bought
the appliance for proper type of appliance.
, page 6.
WARNING: This appliance
is equipped for (natural or propane/LP) gas. Field conversion
is not permitted.
INSTALLATION AND CLEARANCES
FOR VENT-FREE OPERATION
WARNING: M ai nt ai n the
minimum clearances. If you can,
provide greater clearances from
floor, ceiling and adjoining wall.
MINIMUM FIREPLACE CLEARANCE TO
COMBUSTIBLE MATERIALS
SIDE WALL
CEILING 42"
FLOOR 5"
LOG SIZING REQUIREMENTS
MINIMUM FIREBOX SIZE
LOG
HEIGHT DEPTH FRONT
SIZE
18" 17" 14" 24" 20"
24" 17" 14" 28" 22"
*Measured at 14" depth.
Allow adequate clearances for accessibility for
purposes of servicing and proper operation
Carefully follow the instructions below. This will
ensure safe installation into masonry, UL127-listed
manufactured fireplace or listed 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, page 10.
Example: The face of a mantel, bookshelf,
etc., is made of combustible material must be
4" from the side of the fireplace to the cabinet
(see Figure 4, page 10).
B.
Clearances from the top of the fireplace opening to the ceiling should not be less than 42".
16"
WIDTH
REAR
WIDTH
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INSTALLATION
Heat Resistant
Material
(A)
Continued
Example
*Minimum 16 inches from Side Wall
Figure 4 - Minimum Clearance for
Combustible to Wall
NOTICE: Non thermostat controlled heaters may be used as
a vented product. If so, you must
always run heater with chimney
flue damper open and damper
clamp installed. If running heater
with damper open, noncombustible material above the fireplace
opening is not needed. Go to
Installing Damper Clamp Accessory for Vented Operation,
page 12.
Minimum Noncombustible Material
Clearances
If Not Using Mantel
Note: If using a mantel proceed to If Using Man-
tel. If not using mantel, follow the information
on this page.
You must have noncombustible material(s) above
the fireplace opening. Noncombustible materi
als (such as slate, marble, tile, etc..) Must be at
least 1/2" thick. With sheet metal, you must have
noncombustible material behind it. Noncombus
tible material must extend at least 8" up (for all
models). If noncombustible material is less than
12", you must install the fireplace hood accessory
(24" Models Only). See Figure 5 for minimum
clearances.
10
Noncombustible Re qu ir em en ts for
Material Distance (A) Safe Installation
12" or more Noncombustible
Between 8" and 12" 24" Models:
18" Model: Noncom-
*
Less than 8"
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
If Using Mantel
You must have noncombustible material(s) above
the fireplace opening. Noncombustible materials
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(such as slate, marble, tile, etc.) must be at least
1/2" thick. With sheet metal, you must have non
combustible 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 fireplace hood accessory (24"
Models Only). Even if noncombustible material
is more than 12", you may need the hood acces
sory to deflect 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 minimum
clearances, you must operate heater with chimney
flue damper open. Go to Installing Damper Clamp
Accessory for Vented Operation
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material OK.
Install fireplace hood
accessory (GA6050,
GA6052, GA6053, see
Accessories, page 27).
bustible 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 flue damper
open and damper
clamp installed.
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, page 12.
114744-01C
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