36" & 42" Unvented Fireboxes
P/N 700,018M REV. C 12/2003
MODELS
UVFR-500UVFC-500
UVFR-600UVFC-600
UVFR-500
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
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.
FOR YOUR SAFETY: Do not store or use gasoline
or other flammable vapors or liquids in the vicinity
of this or any other appliance.
FOR YOUR SAFETY: What to do if you smell gas:
• DO NOT light any appliance.
• DO NOT touch any electrical switches.
• DO NOT use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone.
Follow your gas suppliers instructions.
• If your gas supplier cannot be reached, call the
fire department.
Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
FOR USE ONLY WITH DECORATIVE TYPE UNVENTED ROOM
HEATERS.
DO NOT BUILD A WOOD FIRE.
WARNING: IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE CAN CAUSE INJURY OR PROPERTY DAMAGE. REFER TO THIS MANUAL.
FOR ASSISTANCE OR ADDITIONAL INFORMATION CONSULT A QUALIFIED INSTALLER, SERVICE AGENCY OR THE
GAS SUPPLIER.
WARNING: DO NOT BURN WOOD OR OTHER MATERIAL IN
THESE APPLIANCES.
CAREFULLY REVIEW THE INSTRUCTIONS SUPPLIED WITH
THE DECORATIVE TYPE UNVENTED ROOM HEATER FOR
THE MINIMUM FIREPLACE SIZE REQUIREMENT.
DO NOT INSTALL THE APPLIANCE IN THIS FIREBOX, UNLESS THIS FIREBOX MEETS THE MINIMUM DIMENSIONS
REQUIRED FOR THE INSTALLATIONS.
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 Combustion
and Ventilation Air Section, Page 3.
Due to high temperatures, the appliance should be located out
of traffic and away from furniture or draperies.
Do not place clothing or other materials on or near this appliance.
IMPORTANT: READ AND UNDERSTAND THESE INSTRUCTIONS
COMPLETELY BEFORE INSTALLING YOUR UNVENTED ROOM
HEATERS.
1
TABLE OF CONTENTS
Firebox/Log Set Reference Chart ..... page 2
General Information......................... page 2
Replacement Parts .......................... page 10
Accessories/Components ................ page 10
Replacement Parts List.................... page 11
GENERAL INFORMATION
These ventless firebox enclosures are designed
to accept all ANSI Z21.11.2 approved Decorative Type Unvented Gas Log Room Heaters.
For the appropriate Unvented Gas Log Room
Heater model, refer to the chart below. Refer to
the installation instructions provided with the
log sets for detailed instructions.
The UVFC Series are unvented fireboxes. They
feature a self-contained heat-circulating system.
The UVFR Series is a conventional radiantheat unvented firebox.
This installation manual will enable you to
obtain a safe, efficient and dependable installation of your room heater system.
Do not alter or modify the firebox or its components under any circumstances. Any modification or alteration of the firebox system, including but not limited to the firebox and accessories, may void the warranty, listings and
approvals of this system and could result in an
unsafe and potentially dangerous installation.
These Built-In Unvented Fireboxes have been
tested and approved as Ventless Firebox Enclosures for Gas-Fired Decorative Type Ventless
Room Heaters to IAS 2-97.
WARNING: THESE BUILT-IN UNVENTED FIREBOXES HAVE ONLY
BEEN TESTED AND APPROVED FOR
USE WITH ANSI Z21.11.2 UNVENTED GAS LOGS.
Check the inventory list to be sure that you have
all the necessary parts in usable condition. Also
check for concealed damage.
Inventory
Unvented Gas Firebox
Canopy
Gas Connector Fittings
Installation and Operating Instructions
Tools and Building Supplies
Normally Required
Tools Should Include:
Phillips screwdriver
Hammer
Saw and/or sabersaw
Level
Measuring tape
Electric drill and bits
Pliers
Square
Piping complying with local codes
Pipe wrench
Tee joint
Pipe compound
INSTALLER: PLEASE LEAVE THESE INSTRUCTIONS WITH THE OWNER.
DO NOT ATTEMPT TO BURN SOLID
WOOD FUELS, OTHER GAS LOG SETS
OR ANY OTHER COMBUSTIBLE MATERIALS IN THIS UNVENTED FIREBOX.
Log Set Sizing Reference Chart
Unvented FireboxUnvented Room Heater Log Set
ModelNaturalPropane (L.P.G)
UVFC-500VFGL-18/24MN/VN-3VFGL-18/24MP/VP-3
PVFGL-18MN/VNPVFGL-18MP/VP
OWNER: PLEASE RETAIN THESE INSTRUCTION FOR FUTURE REFERENCE
IMPORTANT: BEFORE STARTING YOUR FIREBOX INSTALLATION, READ THESE INSTALLATION INSTRUCTIONS CAREFULLY TO BE SURE
YOU UNDERSTAND THEM COMPLETELY AND
IN ENTIRETY. FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD CAUSE A HEATER
MALFUNCTION RESULTING IN SERIOUS INJURY AND/OR PROPERTY DAMAGE.
WARNING: ANY CHANGE TO THIS UNVENTED ROOM HEATER CAN BE DAN-
UVFC-600VFGL-24/28MN/VN-3VFGL-24/28MP/VP-3
PVFGL-24MN/VNPVFGL-24MP/VP
UVFR-500VFGL-18/24MN/VN-3VFGL-18/24MP/VP-3
PVFGL-18MN/VNPVFGL-18MP/VP
UVFR-600VFGL-24/28MN/VN-3VFGL-24/28MP/VP-3
PVFGL-24MN/VNPVFGL-24MP/VP
2
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
GEROUS. IMPROPER INSTALLATION OR
USE OF THIS HEATER CAN CAUSE SERIOUS INJURY OR DEATH FROM FIRE,
BURNS, EXPLOSION OR CARBON MONOXIDE POISONING.
Carbon Monoxide Poisoning: Early signs of
carbon monoxide poisoning are similar to the
flu with headaches, dizziness and/or nausea.
If you have these signs, obtain fresh air immediately. Have the Unvented Gas Heater
serviced as it may not be operating correctly.
• Due to high temperatures, the firebox should
be located out of traffic and away from furniture
and draperies.
• Children and adults should be alerted to the
hazard of high surface temperature and should
stay away to avoid burns or clothing ignition.
• Young children should be carefully supervised when they are in the same room with the
heater.
• Do not place clothing or other flammable
material on or near the heater.
• Any safety screen or guard removed for
servicing the firebox must be replaced and/or
closed prior to operating the heater.
• Installation and repair should be done by a
qualified service person. The heater 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 is
important that control compartments, burners
and circulating air passageways of the heater
be kept clean.
• Allow the heater to cool before servicing.
Always shut off any electricity or gas to the
heater while performing service work.
• Do not install the firebox in a sleeping room
or bathroom.
• The appliance and its individual shut-off valve
must be disconnected from the gas supply
piping system while performing any tests of the
gas supply piping system at pressures in excess of ¹⁄₂ psig.
• The heater must be isolated from the gas
supply piping system by closing its individual
manual shut-off valve during any pressure testing of the gas supply piping system at test
pressures equal to or less than ¹⁄₂ psig.
• Keep heater area clear and free from combustible materials, gasoline and other flammable vapors and liquids.
• Do not use this heater if any part has been
under water. Immediately call a qualified service technician to inspect the heater and to
replace any part of the control system and any
gas control which has been under water.
• Ensure that the heater is clean when operating. Excessive dust accumulation on the burner
and logs will increase the amount of carbon
monoxide formation and could lead to carbon
monoxide poisoning and death.
CODES
Adhere to all local codes or in their absence the
latest edition of The National Fuel Gas Code
ANSI Z223.1 or NFPA54 which can be obtained
from The American National Standards Institute, Inc. (1430 Broadway, New York, NY,
10018) or National Fire Protection Association,
Inc. (Batterymarch Park, Quincy, MA, 02269).
COMBUSTION AND VENTILATION AIR
Heaters installed in these appliances shall not
be installed in a confined space. Heaters
installed in these appliances may be located
in unusually tight construction provided the
space is unconfined, or if confined, is provided with two permanent openings communicating directly with an additional room(s)
of sufficient volume so that the combined
volume of all connected spaces meets the
criteria for an unconfined space, (National
Fuel Gas Code ANSI Z223.1 1992, Section
5.3). Generally 50 ft3 per 1,000 BTU input of
all operating appliances in the space.
The National Fuel Gas Code defines a confined
space as a space whose volume is less than
50 ft3 per 1,000 BTU/Hr (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 ft
per 1,000 BTU/Hr (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.
Unusually tight construction is defined as construction where:
a. wall and ceilings exposed to the outside
atmosphere have a continuous water vapor
retarder with a rating or one perm or less with
openings gasketed or sealed, and
b. weather stripping has been added on operable 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 wallceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines,
and at other openings.
Use the following equations to determine if
you have a confined or unconfined space.
1.Determine the volume of space — ft
Length x Width x Height = _____ft
(Include adjoining rooms with doorless passageways or ventilation grills between
rooms.)
Example: 24' (L) x 16' (W) x 8' (H) = 3072
3
ft
2.Divide the volume of space by 50 ft3 to
determine the maximum BTU/Hr the space
can support.
______ (volume of space – ft
(Maximum BTU/Hr the space can support)
Example: 3072 ft
3
/ 50 ft3 = 61.44
or 61,440 BTU/Hr the space can support.
3.Add the BTU/Hr of all the fuel burning appli-
ances in the space.
Vent-Free heater_______ BTU/Hr
Gas appliance #1*_______ BTU/Hr
Gas appliance #2+ _______ BTU/Hr
Total = _______ BTU/Hr
Example:
Vent-free heater26,000BTU/Hr
Gas appliance #140,000BTU/Hr
(water heater)
Total = 66,000BTU/Hr
3
* Do not include direct-vent gas appliances.
Direct-vent is sealed combustion and draws
combustion air from the outdoors.
4. Compare the maximum BTU/Hr the space
can support with the actual amount of BTU/
Hr used.
_________ BTU/Hr
(max. the space can support)
_________ BTU/Hr
(actual amount of BTU/Hr used)
Example:
61,440BTU/Hr
(max. the space can support)
66,000BTU/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 support. You must provide additional fresh air.
3
.
3
)/ 50 ft3 =
3
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
3
WARNING: IF THE AREA IN WHICH THE
HEATER MAY BE OPERATED IS SMALLER
THAN THAT DEFINED AS AN UNCONFINED SPACE, PROVIDE ADEQUATE
COMBUSTION AND VENTILATION AIR BY
ONE OF THE METHODS DESCRIBED IN
THE NATIONAL FUEL GAS CODE, ANSI
Z223.1 1992, SECTION 5.3 OR APPLICABLE LOCAL CODES.
Your options are:
a. Rework equations adding the space of ad-
joining room(s). If the extra volume provides
an unconfined space, then remove door or
add ventilation grills between rooms. Refer
to National Fuel Gas Code, ANSI Z223.1
1992, Section 5.3.
b. Vent room directly to the outdoors. Refer to
National Fuel Gas Code, ANSI Z223.1 1992,
Section 5.3.
c. Install a lower BTU/Hr heater, such as a
21,000 BTU/Hr, to make the area an unconfined space.
If the actual BTU/Hr used is less than the
maximum BTU/Hr the space can support, then
the space is an unconfined space. You will need
no additional fresh air ventilation for an unconfined space.
• Never obstruct the front opening of the unvented firebox or restrict the flow of combustion and ventilation air.
• Minimize modifications to existing construction. See
Figure 1
for location suggestions.
WARNING: MAINTAIN MINIMUM
CLEARANCES.
Do not install in the vicinity where gasoline or
other flammable liquids may be stored. The
unvented firebox must be kept clear and free
from these combustible materials.
CAUTION: HEATERS CREATE 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 IN THE AIR (SUCH AS TOBACCO
SMOKE) EXISTS, MAY DISCOLOR WALLS.
WARNING: DO NOT ALLOW FANS TO
BLOW DIRECTLY INTO THE FIREPLACE.
AVOID ANY DRAFTS THAT ALTER
BURNER FLAME PATTERNS.
WARNING: DO NOT USE A BLOWER INSERT, HEAT EXCHANGER INSERT OR
OTHER ACCESSORY NOT APPROVED
FOR USE WITH THIS FIREPLACE.
Clearances
WARNING: DO NOT INSTALL THESE
BUILT-IN UNVENTED FIREBOXES IN
SLEEPING QUARTERS, OR IN RECREATIONAL VEHICLES.
WARNING: DO NOT INSTALL THESE
APPLIANCES:
• WHERE CURTAINS, FURNITURE,
CLOTHING OR OTHER FLAMMABLE
OBJECTS ARE LESS THAN 42" FROM
THE FRONT OF THE UNVENTED ROOM
HEATER.
• IN HIGH TRAFFIC AREAS.
• IN WINDY OR DRAFTY AREAS.
Ensure the minimum clearances shown in
ures 2 and 3
clearances are determined when facing the
front of the firebox.
Follow these instructions carefully to ensure
safe installation. Failure to follow these requirements may create a fire hazard.
Sidewall clearances: The sides of the firebox
opening must be at least 16" from any combustible wall (
are maintained. Left and right
Figure 2
).
Fig-
LOCATION OF FIREBOX
Carefully select the best location for installation
of your built-in unvented firebox. The following
factors should be taken into consideration:
• Clearance to side wall, ceiling, woodwork
and windows.
• Location must not be affected by drafts
caused by kitchen exhaust fans, return air registers for forced air furnaces/air conditioners,
windows or doors.
• Installation must provide adequate ventilation and combustion air.
• Do not install this firebox in a sleeping room
or bathroom.
• Location should be out of high traffic areas
and away from furniture and draperies due to
heat from firebox.
Figure 1
Not to Scale
40"
16"
Optional
Hearth Extension
Figure 2
Ceiling clearance: The ceiling must be at
least 40" from the top of the firebox opening
(
Figure 2
Noncombustible material: Noncombustible
materials, such as slate and marble, must be at
least ¹⁄₂" thick and may be used without restric-
tion above the firebox opening, to the sides or
as a hearth extension, so long as they do not
obstruct vent openings for heat circulating
models.
).
4
NOTE: DIAGRAMS & ILLUSTRATION NOT TO SCALE.
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