Desa LGFB32C Original instructions

WARNING: If the information in this manual is not


FOR USE ONLY WITHA LISTED GAS-FIRED UNVENTED


      


       
-

        
-



For more information, visit www.desatech.com
UNVENTED (VENT-FREE) UNIVERSAL FIREBOX
SAFETY INFORMATION AND INSTALLATION MANUAL


LGFB32C
CIRCULATING LOUVERED MODEL

www.desatech.com 119505-01E2
WARNING: Do not allow fans



    
   

-
 
-






children and adults away from hot


-


    


 




-
dren when they are in the room

SAFETY
  
 
alteration, service or
maintenance can cause
   -

for correct installation
  -
   
additional information
   -


-

 
 
-



IMPORTANT: Read this owner’s

    -
    

    
-


    


TABLE OF CONTENTS
Safety .................................................................. 2
Local Codes......................................................... 3
Unpacking............................................................ 3
Product Features ................................................. 3
Product Specications......................................... 4
Locating Firebox .................................................. 4
Air For Combustion and Ventilation..................... 4
Installation ........................................................... 7
Replacement Parts ............................................ 12
Technical Service............................................... 12
Accessories ....................................................... 13
Parts Central...................................................... 13
Parts .................................................................. 14
Warranty ..............................................Back Cover

www.desatech.com
119505-01E 3


   

1. This rebox shall not be installed in a
bedroom or bathroom.
2. Never install the rebox
• in a recreational vehicle
• where curtains, furniture, clothing or
other ammable objects are less than
42" from front, top or sides of rebox
• in high trafc areas
• in windy or drafty areas
3. Do not use this rebox as a wood-burning
replace. Use only decorative unvented
room heaters (log sets).
4. Do not add extra logs or ornaments such as
pine cones, vermiculite or rock wool. Using
these added items can cause sooting.
SAFETY
Continued
PRODUCT FEATURES
5. Vent-free gas log heaters installed in these
reboxes require fresh air ventilation to
run properly. See Air for Combustion and
Ventilation, page 4.
6. Do not run rebox
• where ammable liquids or vapors are
used or stored
• under dusty conditions
7. Do not use this rebox to cook food or
burn paper or other objects.
8. Turn rebox off and let cool before servic-
ing. Only a qualied service person should
service and repair rebox.
9. Operating vent-free log sets in a rebox
above elevations of 4,500 feet could
cause pilot outage.
10. Do not use the rebox if it has been un-
der water due to the shock hazard that
could result with the blower accessary (if
installed) in place.
11. Provide adequate clearances around air
openings.
LOCAL CODES
Install and use replace 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*. Firebox must be electri-
cally grounded in accordance with the National
Electrical Code, ANSI/NFPA70 (latest edition).
*Available from:
American National Standards Institute, Inc.
1430 Broadway, New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park, Quincy, MA 02269
State of Massachusetts: The installation
must be made by a licensed plumber or
gas tter in the Commonwealth of Mas-
sachusetts.
Sellers of unvented propane or natural
gas-red 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.
UNPACKING
1. With utility knife, cut carton all the way
around above staples on bottom tray. Lift
carton off rebox. Remove packing.
2. Check carton contents for the following:
• Screen assembly
• Screen support rod
• Hardware and parts bag containing the
following:
Owner’s Manual
2 - Black #10 x 3/8" Phillips screws
3. If any items are missing, inform dealer
where you bought the rebox.
4. Check heater for any shipping damage.
If heater is damaged call DESA Heat-
ing, LLC at 1-866-672-6040 for replace-
ment parts before returning to dealer.
OPERATION
This rebox is designed to accept unvented
decorative gas logs. It requires no outside
venting or chimney making installation easy
and inexpensive. When used without the
blower the rebox requires no electricity mak-
ing it ideal for emergency backup heat.
BLOWER ACCESSORY
The LGFB32C rebox will accept the GA3750A
accessory. The variable blower allows you to
select the fan speed you desire. The blower
circulates heated air from the rebox into the
room. Use of blower is optional.

www.desatech.com 119505-01E4
PRODUCT SPECIFICATIONS
22 1/2"
16 11 /16"
13 1/4"
*
14
1/4"
31 5/8"
34 3/8"
35 5/8"
19 1/4"
Figure 3 - Firebox Top View
*Note: 14 1/4" is total
rebox cavity depth
including brick liner.
13 1/4" is depth of at
oor including brick
liner.
Plan where you will install the rebox. This will
save time and money later when you install
the rebox. Before installation, consider the
following:
1. Where the rebox will be located. Allow for
wall and ceiling clearances (see Installa-
tion Clearances, page 7).
12
1
/
2
"
9
3
/
4
"
4
5
/
8
"
2
1
/
2
"
6"
32
1
/
2
"
2
1
/
4
"
Electrical Access Hole Gas Line Access
Figure 2 - Firebox Side View
35
1
/
16
"
31
3
/
4
"
1
1
/
4
"
16
1
/
4
"
2
3
/
4
"
3
7
/
8
"
6
3
/
4
"
2
3
/
4
"
6
3
/
8
"
19
3
/
8
"1
1
/
4
"
Built-in Nailing Flanges
Figure 1 - Firebox Front View
LOCATING FIREBOX
2. Everything needed to complete installation.
3. This model CANNOT be installed in a
bedroom or bathroom.
4. Proper air for combustion and ventilation
(see Air For Combustion and Ventilation).
AIR FOR COMBUSTION AND VENTILATION
WARNING: This heater shall

    

 
National Fuel Gas Code, ANSI
Z223.1/NFPA54, the International
Fuel Gas Code,  




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 ap-
pliances need fresh air for proper combustion
and ventilation.
Exhaust fans, reboxes, clothes dryers and fuel
burning appliances draw air from the house to

www.desatech.com
119505-01E 5
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.
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 4 through 6 will help
you classify your space and provide adequate
ventilation.

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.

construction where:
 -
    

-112) or less
and
 
and
      
     


    


If your home meets all of the three criteria

See Ventilation Air From Outdoors
If your home does not meet all of the three
    Determining
Fresh-Air Flow For Firebox Location

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/hr (4.8 m3 per kw) of the aggregate
input rating of all appliances installed in that
AIR FOR COMBUSTION AND VENTILATION
Continued
space and an unconned space as a space
whose volume is not less than 50 cubic feet 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 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


Use this work sheet to determine if you have
a conned or unconned 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) = 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. Add the Btu/Hr of all fuel burning appliances
in the space.
Vent-free heater ___________ 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
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.

www.desatech.com 119505-01E6
AIR FOR COMBUSTION AND VENTILATION
Continued
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
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 thermo-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
Figure 4 - 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"
Figure 5 - Ventilation Air from Outdoors
Outlet
Air
Ve ntilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ve ntilated
Crawl Space
T o
Crawl
Space
T o Attic
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.
_______ Btu/Hr (maximum the space can
support)
_______ Btu/Hr (actual amount used)
Example: 51,200 Btu/Hr (maximum the
space can support)
79,000 Btu/Hr (actual amount of
Btu/Hr used)
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 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 an unconned 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
Ventilation Air From Outdoors.
C. Install a lower Btu/Hr heater, if lower Btu/
Hr size makes room unconned.
If the actual Btu/Hr used is less than the
maximum Btu/Hr the space can support, the
space is an unconned space. You will need
no additional fresh air ventilation.
WARNING:Iftheareainwhich


-


   National Fuel
Gas Code,ANSI Z223.1/NFPA 54,
theInternational Fuel Gas Code,

VENTILATION AIR

This fresh air would come from an adjoining
unconned space. When ventilating to an
adjoining unconned space, you must provide
two permanent 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 4). You can also remove door
into adjoining room (see option 3, Figure 4).
Follow the National Fuel Gas Code ANSI
Z223.1/NFPA 54, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.
40,000
39,000
79,000

www.desatech.com
119505-01E 7
are integrally attached. If standoff spacers
are attached to your rebox, these spacers
can be placed directly against wall or fram-
ing materials.
Use the dimensions shown for rough openings
to create the easiest installation (see Built-In
Firebox Installation, page 10).
INSTALLATION CLEARANCES
WARNING: Maintain the
   



Carefully follow the instructions below. This
will ensure safe installation.
Minimum Clearances For Side


A. Clearances from side of replace cabinet
to any combustible material and wall
should follow diagram in Figure 6.
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 side of
replace opening (see Figure 6).
B. Clearances from top of replace opening
to ceiling should not be less than 42".
INSTALLATION
Figure 6 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
NOTICE: This heater is intended
    


     -








-


WARNING: Never install the

 
 
   
   

 

 
IMPORTANT: Vent-free gas log heaters add
moisture to the air. Although this is benecial,
installing rebox in rooms without enough
ventilation air may cause mildew to form from
too much moisture. See Air for Combustion
and Ventilation, page 4.
IMPORTANT: Make sure the rebox is level.
If rebox is not level, log set will not work
properly.
Note: Your rebox is designed to be used in
zero clearance installations. Wall or framing
material can be placed directly against any
exterior surface on the rear, sides or top of
your rebox, except where standoff spacers

www.desatech.com 119505-01E8
Supplied
Firebox Hood
Must Be Used
at All Times
Wire-mesh
Screen
Firebox
Mantel Shelf
13" 16" 19" 21"
2
1/2
"
6"
8"
10"
For
CGFB32C
Series
circulating
louvered
models
only
Note:
A
ll vertical measurements
are from top of fireplace
opening to bottom of mantel
shelf. All measurements
are in inches.
Facing material (above
firebox) may be of
combustible material,
including decorative
mantel ornaments.
Mantel Clearances for Built-In
Installation
If placing custom mantel above built-in re-
box, you must meet the minimum allowable
clearance between mantel shelf and top of
rebox opening shown in Figure 7. These are
the minimum allowable mantel clearances
for a safe installation. Use larger clearances
wherever possible to minimize the heating of
objects and materials placed on the mantel.
CAUTION: Close screens
   



If your installation does not meet the minimum
clearances in Figure 7, you must:
• raise mantel to an acceptable height,
OR
• remove mantel.
INSTALLATION
Continued
Figure 7 - Minimum Mantel Clearances
for Built-In Installation
INSTALLING BLOWER ACCESSORY
You may install blower accessory GA3750A
with conventional installation (below) or with
built-in installation (see Built-In Installation of
Blower Accessory). To install blower accessory,
see instruction sheet included with the kit.
Side
Opening
Support Bracket
Opening
Blower Power
Cord
Figure 8 - Routing Blower Accessory
Power Cord for Conventional Installation
Electrical
Outlet
Blower
Built-In Installation of Blower Accessory
1. Install blower assembly per instruction
sheet included.
2. Before replacing bottom of rebox, re-
move screw holding duplex outlet to sup-
port bracket in bottom of rebox. Remove
duplex outlet.
3. Clamp electrical cable into firebox
through smallest hole using strain relief
provided.
4. Route wires from electrical box through
hole in side of heater and hole in support
bracket (see Figure 9, page 9).
Conventional Installation of Blower
Accessory
1. Install blower assembly per instruction
sheet included in blower accessory kit.
2. Before replacing bottom of rebox, route
blower power cord through hole in support
bracket in bottom of rebox and through
hole in side of rebox to grounded, three-
prong 120 volt electrical outlet (see Fig-
ure 8). Plug electrical cord into outlet.
3. Replace bottom of rebox.
 

-


the National Electrical Code,
ANSI/NFPA 70 (Latest Edition)

www.desatech.com
119505-01E 9
2. Lift and remove firebox bottom (see
Figure 10).
3. If installing GA3750A blower accessory,
see Installing Blower Accessory, page 8.
4. Route exible gas line from equipment
shutoff valve into rebox through side.
   
    

isrecommendedto allow acces-
-



5. Attach gas log heater base to rebox bot-
tom with four screws included with base
(see Installing Heater Base Assembly in
log set owner’s manual).
6. Replace rebox bottom and secure with
screws.
INSTALLATION
Continued
Figure 9 - Routing Blower Accessory
Power Cord for Built-In Installation
Screw
Blower Power Cord
Blower Support Bracket
Cables From
Electrical Source
Duplex
Outlet

Light your gas appliance with the blower off.
After about 15 minutes, turn the blower on
to deliver heated air at the top louvers. The
blower features a variable control which al-
lows you to select the speed you desire.
Note: Periodically check the louvers of the
rebox and remove any dust, dirt or other
obstructions.
INSTALLING LOG HEATER IN



   

CAUTION:Donotremovethe




1. Remove 4 screws holding rebox bottom
in place.
Figure 10 - Removing Firebox Bottom
5. Connect wires from the electrical box to
duplex outlet. Match wire colors to those
indicated on duplex outlet. Be sure to
connect ground wire.
6. Replace duplex outlet with screw.
7. Plug blower power cord into duplex outlet.
8. Replace bottom of rebox.
INSTALLING FIREPLACE HOOD

     

-

1. Attach three zinc-colored shoulder screws
to back of hood.
2. Insert hood into hood-mounting slots on
rebox.
3. Hold hood in place. Insert two black Phil-
lips screws through bottom of hood and
tighten. See Figure 11, page 10.

www.desatech.com 119505-01E10
INSTALLATION
Continued
Ring
Figure 12 - Installing Fireplace Screen
Rod
Front and
Rear Hole
Screen
Screw
INSTALLING FIREPLACE SCREEN
1. Insert each rod through nine rings located
at top of screen (see Figure 12).
2. Insert rst rod into rear hole in left side
of rebox. Fasten rod to rear hole near
center of rebox using black shoulder
screw.
3. Insert other rod into front hole on right
side of rebox and fasten using remaining
shoulder screw.
Figure 13 - Rough Opening for Installing
in Wall
Figure 14 - Rough Opening for Installing
in Corner
34 3/4"
17 3/4"
33"

Built-in installation of this rebox involves
installing rebox into a framed-in enclosure.
This makes the front of rebox ush with wall.
Optional perimeter trim is available (see Ac-
cessories, page 13) This perimeter trim will
extend past sides of rebox approximately
1/2". This will cover rough edges of the wall
opening. If installing a mantel above the re-
box, you must follow the clearances shown in
Figure 7, page 8. Follow the instructions below
to install the rebox in this manner.
1. Frame in rough opening. Use dimensions
shown in Figure 13 for the rough opening.
If installing in a corner, use dimensions
shown in Figure 14 for the rough opening.
The height is 33", which is the same as
the wall opening in Figure 13.
2. Install gas piping to rebox location. This
installation includes an approved exible
gas line (if allowed by local codes) after
the equipment shutoff valve. The exible
gas line must be the last item installed on
the gas piping. See Connecting to Gas
Supply in log set owner’s manual.
3. Carefully set rebox in front of rough open-
ing with back of rebox inside wall opening.
IMPORTANT: If installing perimeter trim,
see instructions included with perimeter
trim accessory. You must install shoulder
screws now.

OPTIONAL ACCESSORY MANTELS
This rebox may be installed using the corner
or cabinet mantel with hearth base against
a wall in your home. A perimeter trim kit is
included with the mantel accessories (see
Accessories, page 13).
39 3/8"
27 7/8"
55 5/8"
34 3/4"
Figure 11 - Installing Fireplace Hood
Hood Hood
Mounting
Slot
Screw
Shoulder
Screw