Warranty Information ...........................Back Cover
WARNING: Improper installation, adjustment, al-
teration, service or maintenance can cause in-
jury or property damage.
Refer to this manual for
correct installation and
operational procedures.
For assistance or additional information con-
sult a qualied installer,
service agency or the gas
supplier.
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 Air
for Combustion and Ventilation section on page 5
of this manual.
This appliance may be in-
stalled in an aftermarket,*
perm a nently loca t ed,
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
State of Massachusetts: The installation
must be made by a licensed plumber or
gas tter in the Commonwealth of Massachusetts.
Sel lers of unvented propane or natu ral
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.
www.desatech.com
111604-01N2
Page 3
SAFETy INFORMATION
Continued
WARNING: This product con-
tains 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 this heater can cause seri-
ous injury or death from burns, re,
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 heater may not be working properly. Get fresh air at once! Have heater 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 inuence
of alcohol and those at high altitudes.
Natural and Propane/LP Gas: Natural and pro-
pane/LP gases are odorless. An odor-making agent
is added to the gas. The odor helps you detect a gas
leak. However, the odor added to the gas can fade.
Gas may be present even though no odor exists.
Make certain you read and understand all warnings. Keep this manual for reference. It is your
guide to safe and proper operation of this heater.
WARNING: Any change to
this heater or its controls can
be dangerous.
WARNING: Do not allow fans
to blow directly into the replace.
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 use a
blower insert, heat exchanger
insert or other accessory not approved for use with this heater.
Due to high temperatures, the
appliance should be located out
of trafc 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.
Fireplace and screen become
very hot when running replace.
Keep children and adults away
from hot surfaces to avoid burns
or clothing ignition. Fireplace
will remain hot for a time after
shutdown. Allow surfaces to
cool before touching.
Carefully supervise young chil-
dren when they are in the room
with replace. When using the
optional hand-held remote accessory, keep selector switch
in the OFF position to prevent
children from turning on burners
with remote.
You must operate this replace
with the replace screen and
hood in place. Make sure replace screen and hood are in
place before running heater.
Keep the appliance area clear
and free from combustible materials, gasoline and other ammable vapors and liquids.
111604-01N3
www.desatech.com
Page 4
SAFETy INFORMATION
O
F
F
P
I
L
O
T
O
N
Continued
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 replace shall not be installed in a bed-
room or bathroom.
5. Do not use this replace as a wood-burning
replace. Use only the logs provided with the
replace.
6. Do not add extra logs or ornaments such as
pine cones, vermiculite or rock wool. Using
these added items can cause sooting. Do not
add lava rock around base. Rock and debris
could fall into the control area of replace.
7.
To prevent the creation of soot, follow the instructions in Cleaning and Maintenance, page 24.
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 burner
box or on adjacent walls or furniture.
9. This replace needs fresh air ventilation to run
properly. This replace has an Oxygen Depletion Sensing (ODS) safety shutoff system. The
ODS shuts down the replace if enough fresh
air is not available. See Air for Combustion and Ventilation, page 5. If replace keeps
shutting off, see Troubleshooting, page 25.
10. Do not run replace
• where ammable liquids or vapors are used
or stored
• under dusty conditions
11. Do not use this replace to cook food or burn
paper or other objects.
12. Do not use replace if any part has been exposed
to or under water. Immediately call a qualied
service technician to inspect the replace and to
replace any part of the control system and any
gas control which has been under water.
www.desatech.com
13. Do not operate replace if any log is broken.
Do not operate replace if a log is chipped
(dime-sized or larger).
14. Turn replace off and let cool before servicing. Only a qualied service person should
service and repair replace.
15. Operating replace above elevations of 4,500
feet could cause pilot outage.
16. To prevent performance problems in propane/LP
units, do not use propane/LP fuel tanks of less
than 100 lbs. capacity (propane/LP units only).
17. Prov ide adequa te cleara nce s arou nd air
openings.
PRODUCT
IDENTIFICATION
4-Piece Log Set
(A Models shown)
Control
Knob
Piezo
Ignitor
Remote Control
Figure 1 - Log Base Assembly
Top Louver
Top Outer Casing
Assembly
Firebox
Hood
Firebox
Support
Screen
Assembly
Bottom Louver Assembly
Figure 2 - Fireplace (LMFP33PR Shown)
Remote
Receiver
Blower
Assembly
(Optional)
111604-01N4
Page 5
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*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
Note: Where listed vented decorative logs are
required, thermostat operation is not permitted.
UNPACkING
CAUTION: Do not remove the
data plates attached to the heater
base assembly. The data plates
contain important warranty and
safety information.
1. With utility knife, cut the carton all the way
around above the staples on the bottom tray.
Lift the carton off the heater. Remove packing.
Note: The hood is located in the packing on
the right hand side of the heater front. Lift the
heater off the bottom tray.
2. Locate two screws above top corners of the
replace screen. Remove and discard these
screws. Lift replace screen up and pull out
to remove.
3. Remove protective packaging applied to logs,
log base assembly and replace.
4. Remove replace hood from carton insert.
5. Check all items for any shipping damage. If
damaged, promptly inform dealer where you
bought replace.
PRODUCT FEATURES
OPERATION
This vent-free replace is clean burning. It requires
no outside venting. There is no heat loss out a
vent or up a chimney. Heat is generated by both
realistic ames. When used without the blower, the
replace requires no electricity making it ideal for
emergency backup heat. This heater is designed
for vent-free operation. It has been tested and approved to ANSI Z21.11.2 standard for unvented
heaters. State and local codes in some areas pro-
hibit the use of vent-free heaters.
SAFETY DEVICE
This replace 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 system shuts off the replace
if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This replace has a piezo ignitor. This system
requires no matches, batteries or other sources to
light replace.
OPTIONAL BLOWER ASSEMBLY
(GA3750 SERIES & GA3650TB
SERIES)
This replace accepts an optional blower assembly
(not included). The GA3650TB Series blower
operates thermostatically and features a variable
speed control. The GA3750 Series blower operates
manually and also features a variable speed control.
The blower circulates heated air from the replace
into the room. See Accessories, page 34
.
AIR FOR COMbUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a conned
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.
Today’s homes are built more energy efcient
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 efcient, 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.
111604-01N5
www.desatech.com
Page 6
AIR FOR COMbUSTION
AND VENTILATION
Continued
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 following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 5 through 7 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 dened 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 7.
If your home does not meet all of the three
criteria above, proceed to Determining
Fresh-Air Flow For Heater Location.
-11
kg per pa-sec-m2) or less
Conned and Unconned Space
The National Fuel Gas Code, ANSI Z223.1/NFPA
54 denes a conned 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 unconned
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 unconned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation grills
between them.
DETERMINING FRESH-AIR FLOW
FOR FIREPLACE LOCATION
Determining if You Have a Conned or
Unconned Space
Use this work sheet to determine if you have a
conned or unconned space.
Space: Includes the room in which you will install
replace 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
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: 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 in
the space.
Vent-free replace __________ Btu/Hr
Gas water heater* __________ Btu/HrGas furnace __________ Btu/Hr
Vented gas heater __________ Btu/Hr
Gas replace logs __________ Btu/HrOther gas appliances* + ________ Btu/Hr
Total = ________ Btu/Hr
* Do not include direct-vent gas appliances. Di-
rect-vent draws combustion air from the outdoors
and vents to the outdoors.
www.desatech.com
111604-01N6
Page 7
AIR FOR COMbUSTION
Outlet
Air
Ventilated
Attic
Outlet
A
ir
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"
AND VENTILATION
Continued
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 of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space
can support)
73,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the example is a conned 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 adjoin-
ing room. If the extra space provides an unconned
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 Ventila-
tion Air From Outdoors.
C. Install a lower Btu/Hr replace, if lower Btu/Hr
size makes room unconned.
If the actual Btu/Hr used is less than the maximum
Btu/Hr the space can support, the space is an un-
conned space. You will need no additional fresh
air ventilation.
WARNING: If the area in
which the heater may be operated is smaller than that dened
as an unconned 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.
40,000
33,000
73,000
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining unconned space. When ventilating to an adjoining
unconned 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 3). You
can also remove door into adjoining room (see
option 3, Figure 3). 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.
Figure 3 - 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,
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.
111604-01N7
Figure 4 - Ventilation Air from Outdoors
www.desatech.com
Page 8
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.
WARNING: A qualied service person must install replace. Follow all local codes.
WARNING: Never install the
replace
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing or other ammable
objects are less than 42 inches
from the front, top or sides of
the heater
• in high trafc areas
• in windy or drafty areas
CAUTION: This replace creates warm air currents. These
currents move heat to wall sur-
faces next to replace. Installing
replace next to vinyl or cloth
wall coverings or operating
heater where impurities (such
as, but not limited to, tobacco
smoke, aromatic candles, clean-
ing uids, oil or kerosene lamps,
etc.) in the air exist, may discolor
walls or cause odors.
Note: Your replace 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 replace, except
where standoff spacers are integrally attached. If
standoff spacers are attached to your replace,
these spacers can be placed directly against wall
or framing materials.
Use the dimensions shown for rough openings to
create the easiest installation. See Built-In Fireplace Installation, page 11.
IMPORTANT: Vent-free heaters add moisture
to the air. Although this is benecial, installing
replace in rooms without enough ventilation
air may cause mildew to form from too much
moisture. See Air for Combustion and Ventilation,
page 5. IMPORTANT: Make sure the replace
is level. If replace is not level, log set will not
work properly.
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP)
for your replace. 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 (natural or propane/LP) gas. Field conversion
is not permitted.
ELECTRICAL HOOKUP
(Models GA3750 Series and GA3650TB
Series Blower Accessories and GA3555
Internal Duplex Kit)
This replace accepts a blower assembly with an
electrical cord. The electrical cord is ve feet in
length. You must locate replace within reach of
a 120 volt grounded electrical outlet. If not, you
must install an electrical outlet within reach of
replace power cord. The GA3555 outlet accessory is used for built-in applications with blower
accessory installed.
www.desatech.com
111604-01N8
Page 9
INSTALLATION
Continued
INSTALLING HOOD
Install hood to top of rebox as shown in Figure
5. Use 3 Phillips screws provided
Figure 5 - Installing Hood to Firebox
ASSEMBLING AND ATTACHING
OPTIONAL TRIM
(Included with Mantel Accessory)
IMPORTANT: If you are recessing the rebox in a
wall, do not attach trim at this time. See page 11.
Note: The instructions below show assembling
and attaching trim to replace.
1. Remove packaging from three pieces of trim.
2. Locate four brass screws, two adjusting plates
with set screws and two shims in the hardware
packet.
3. Align shim under adjusting plate as shown in
Figure 6.
4. Slide one end of adjusting plate/shim in slot
on mitered edge of top trim (see Figure 6).
5. Slide other end of adjusting plate/shim in slot
on mitered edge of side trim (see Figure 6).
6. While rmly holding edges of trim together,
tighten both set screws on the adjusting plate
with slotted screwdriver.
7. Repeat steps 1 through 6 for other side.
8. Tighten trim hanging screws (#10 x 6.25
shoulder) into holes in cabinets. Place the
assembled trim onto replace cabinet. Align
hanging notches on trim with hanging screws
on side of replace (see Figure 7). Push trim
rmly into place, sliding hanging notches over
hanging screws.
Side Trim
Adjusting
Plate
Set Screws
Top Trim
Trim
Hanging
Screws
Hanging
Notches
on Trim
Assembled
Trim
Figure 7 - Attaching Trim to Fireplace
INSTALLATION CLEARANCES
WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from
oor, ceiling and adjoining wall.
Carefully follow the instructions below. This will
ensure safe installation.
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 8.
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 opening (see Figure 8).
B.
Clearances from the top of the replace opening
to the ceiling should not be less than 42 inches.
MINIMUM CLEARANCE TO
COMBUSTIBLE MATERIALS
Top Left and Bottom
Right Sides and Rear
42" 16" 0"
Example
*
Mitered
Edge
Slot
Figure 6 - Assembling Trim
111604-01N9
Shim
Slot
www.desatech.com
*Minimum 16 inches from Side Wall
Figure 8 - Minimum Clearance for
Combustible to Wall
Page 10
INSTALLATION
Continued
CONVENTIONAL FIREPLACE
INSTALLATION
Conventional installation of this replace involves
installing replace along with the corner, face or
cabinet mantel with hearth base accessories against
a wall in your home. Follow the instructions below
to install the replace in this manner.
Note: The instructions in this section show instal-
lation using the cabinet mantel and hearth base
accessories. The hearth base accessory shown is
optional for this installation. You can install replace and cabinet mantel directly on the oor.
1. Assemble cabinet mantel, hearth base and
trim accessories. Assembly instructions are
included with each accessory.
2. When installing blower, install a properly
grounded, 120 volt three-prong electrical outlet at replace location if an outlet is not there.
If possible, locate outlet so cabinet mantel will
cover it when installed (see Figure 9).
3. Install gas piping to replace 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
Installing Gas Piping to Fireplace Location,
page 13.
4.
Place hearth base accessory against wall at installation location. Cut an access hole in hearth top
to run exible gas line to replace (see Figure
9). Make sure to locate access hole so cabinet
mantel will cover it when installed. Note: You
can secure base to oor using wood screws.
Countersink screw heads and putty over.
5. Route exible gas line through access hole in
hearth base.
6.
Center cabinet mantel on hearth base (see Figure
10). Make sure mantel is ush against wall.
7. Break off nailing anges (see Figure 11) with
hammer or pliers.
8. Place cardboard or other protective material
on top of hearth base. Carefully set replace
on protective material, with back of replace
inside mantel opening.
9. Attach exible gas line from replace gas
regulator to gas supply. See Connecti ng
Fireplace to Gas Supply, page 15.
10.
If blower is installed, route blower electrical cord
through access holes in either side of replace.
Note: Bushing may be moved if necessary. Plug
electrical cord into electrical outlet.
11.
Carefully insert replace into cabinet mantel.
Be careful not to scratch or damage hearth base,
cabinet mantel or any laminate trim on hearth
base. Remove protective material from top of
hearth base and from front of replace (if any).
Note: You can secure replace to hearth or
oor. Open lower louver. Locate screw holes in
bottom of base. Tighten wood screws through
these holes and into hearth or oor.
12. Check all gas connections for leaks. See
Checking Gas Connections, page 16.
Cabinet
Mantel
Figure 10 - Installing Cabinet Mantel
Hearth
Base
Electrical Outlet
Rigid Gas Line
Figure 9 - Placing Hearth Base
Accessory Against Wall
Gas Line
Access
Hole
Figure 11 - Location of Nailing Flanges
www.desatech.com
Nailing
Flanges
111604-01N10
Page 11
INSTALLATION
35 1/8"
17 3/4"
33"
39
3
/
8
"
27
7
/
8
"
55
5
/
8
"
35
1
/
8
"
Continued
4. Connect wires from the electrical box to
duplex outlet. Match wire colors to those
indicated on duplex outlet. Be sure to connect
ground wire.
5. Install shield to end of right support bracket
and behind the rebox wrapper with 2 screws
provided (see Figure 16, page 12).
6. Plug blower cord into duplex outlet.
7. Replace bottom of firebox and reconnect
remote receiver module to valve.
Figure 12 - Inserting Fireplace Into
Cabinet Mantel
BUILT-IN FIREPLACE
INSTALLATION
Built-in installation of this fireplace involves
installing replace into a framed-in enclosure.
This makes the front of replace ush with wall.
If installing a mantel above the replace, you must
Figure 13 - Rough Opening for Installing
in Wall
follow the clearances shown in Figure 18, page 13.
Follow the instructions below to install the replace
in this manner.
Actual Framing
Height 32 3/8" 33"
Front Width 34 5/16" 35 1/8"
Depth 16 11/16" 17 3/4"
Figure 14 - Rough Opening for Installing
in Corner
WARNING: A qualied electri-
cian must connect electrical wiring
Blower
Power Cord
Blower
Cable from
Electrical Source
to duplex outlet for built-in installation. Follow all local codes.
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
above.
2. If using blower, install duplex outlet to the
right support bracket in the bottom of rebox
(see Figure 15). See Accessories, page 34. If
not using blower, go to step 7.
3. Rou te wires from elect rical box through
smallest hole in outer casing using strain relief
tting provided (see Figure 15).
111604-01N11
www.desatech.com
Screw
Figure 15 - Connecting Duplex Outlet
Duplex
Outlet
Support
Bracket
Strain
Relief
Fitting
Page 12
INSTALLATION
Continued
8. Install gas piping to replace 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
Installing Gas Piping to Fireplace Location,
page 13.
9. Carefully set replace in front of rough opening
with back of replace inside wall opening.
10. Attach exible gas line to gas supply. See Con-necting Fireplace to Gas Supply, page 15.
11. Plug electrical cord into electrical outlet
installed in step 2 if using blower.
12. Carefully insert replace into rough opening.
13. Attach replace to wall studs using nails or
wood screws through holes in nailing ange
(see Figure 17).
14. Check all gas connections for leaks. See
Checking Gas Connections, page 16.
15. Install trim after nal nishing and/or painting
of wall (see Figure 7, page 9).
Support Bracket
Firebox
Wrapper
Power
Screw
Cord
Figure 16 - Installing Shield to Support
Bracket
Shield
Nails or Wood
Screws
Nailing Flanges
Figure 17 - Attaching Fireplace to Wall
Studs
Mantel Clearances for Built-In
Installation
If placing mantel above built-in replace, you must
meet minimum clearance between mantel shelf and
top of replace opening.
NOTICE: If your installation does
not meet the minimum clearances shown, you must do one
of the following:
• raise the mantel to an acceptable height
• remove the mantel
NOTICE: Surface temperatures
of adjacent walls and mantels
become hot during operation.
Walls and mantels above the
rebox may become hot to the
touch. If installed properly,
these temperatures meet the
requirement of the national
product standard. Follow all
minimum clearances shown in
this manual.
www.desatech.com
111604-01N12
Page 13
Supplied
Firebox
Hood
Must Be
Used at
All Times
Wire-mesh
Screen
Firebox
Noncombustible
Material May
Project Off this
Surface above
the Firebox
Hood
Mantel Shelf
13" 16" 19" 21"
2
1
/2
"
6"
8"
10"
Note: All vertical
measurements are
from top of fireplace
hood opening to
bottom of mantel
shelf. These minimum
clearances replace any
other recommended
clearances supplied
with your ANSI Z21.11.2
approved gas logs.
Wall board or facing
material (above
firebox) may be of
combustible material,
including decorative
mantel ornaments or
other similar projections off of the facing
material.
Framing
Material
INSTALLING GAS PIPING TO
FIREPLACE LOCATION
requires a 1/2" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualied service
person must connect replace
to gas supply. Follow all local
codes.
CAUTION: Never connect propane/LP replace directly to the
propane/LP supply. This replace
requires an external regulator
(not supplied). Install the external
regulator between the replace
and propane/LP supply.
111604-01N13
INSTALLATION
Continued
Figure 18 - Minimum Mantel Clearances for Built-In Installation
WARNING: Never connect
natural gas replace to private
WARNING: This appliance
www.desatech.com
(non-utility) gas wells. This
gas is commonly known as
wellhead gas.
Installation Items Needed
Before installing replace, make sure you have
the items listed below.
• external regulator for propane/LP unit only
(supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap (optional)
• tee joint
• pipe wrench
• approved exible gas line with gas connector
(if allowed by local codes) (not provided)
* A CSA design-certied equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certied equipment shutoff valve from your
dealer. See Accessories, page 34.
Page 14
INSTALLATION
Continued
For propane/LP units, the installer must supply
an external regulator. The external regulator will
reduce incoming gas pressure. You must reduce
incoming gas pressure to between 11 and 14 inches
of water. If you do not reduce incoming gas pressure, heater regulator damage could occur. Install
external regulator with the vent pointing down
as shown in Figure 19. Pointing the vent down
protects it from freezing rain or sleet.
External
Regulator
Propane/LP
Supply Tank
CAUTION: Use only new,
black iron or steel pipe. Internally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of
1/2" diameter or greater to allow
proper gas volume to replace.
If pipe is too small, undue loss
of volume will occur.
Installation must include an equipment shutoff valve,
union and plugged 1/8" NPT tap. Locate NPT tap
within reach for test gauge hook up. NPT tap must
be upstream from replace (see Figure 20).
IMPORTANT: Install equipment shutoff valve
in an accessible location. The equipment shutoff
valve is for turning on or shutting off the gas to
the appliance.
Check your building codes for any special requirements for locating equipment shutoff valve
to replaces.
Apply pipe joint sealant lightly to male NPT threads.
This will prevent excess sealant from going into
pipe. Excess sealant in pipe could result in clogged
replace valves. Never use sealant on are threads.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
We recommend that you install a sediment trap in
supply line as shown in Figure 20. Locate sediment
trap where it is within reach for cleaning. Install in
piping system between fuel supply and replace.
Locate sediment trap where trapped matter is not
likely to freeze. A sediment trap traps moisture and
contaminants. This keeps them from going into replace gas controls. If sediment trap is not installed or
is installed wrong, replace may not run properly.
Vent Pointing Down
Figure 19 - External Regulator on
Propane/LP Supply Tank with Vent
CSA Design-Certied Equipment Shutoff
Valve With 1/8" NPT Tap*
3" Minimum
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 34.
** Minimum inlet pressure for purpose of input
adjustment.
Pointing Down
Natural Gas
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
Propane/LP
From External
Regulator
(11" W.C.**
to 14" W.C.
Pressure)
Cap Pipe Tee
Nipple Joint
Sediment Trap
Figure 20 - Gas Connection
www.desatech.com
111604-01N14
Page 15
INSTALLATION
O
F
F
P
I
L
O
T
O
N
Continued
CONNECTING FIREPLACE TO GAS
SUPPLY
Installation Items Needed
• 5/16" hex socket wrench or nut-driver
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not provided)
1. Remove two screws that hold replace screen
in place for shipping. These screws are located
near top of screen. Discard screws. Lift replace screen up and pull out to remove.
2. Open lower louv er door. Carefully pull
straight out on the wire harnesses attached to
right side and front of remote receiver module
(see Figure 21).
3. Remove screws that attach log base assembly
to replace (see Figure 21). Carefully lift up
log base assembly and remove from replace
(see Figure 21).
Note: If adding the G8000A series brick liner
accessory, install it now. Follow instructions in
G8000A accessory kit.
CAUTION: Do not pick up
log base assembly by burner.
This could damage burner. Only
handle base by grates.
4. Route gas line (provided by installer) from
equipment shutoff valve to replace. Route
exible gas supply line through one of the
access holes.
NOTICE: Most building codes
do not permit concealed gas
connections. A exible gas line
is provided to allow accessibility
from the replace (see Figure 22).
The exible gas supply line connection to the equipment shutoff
valve should be accessible.
5. Attach the exible gas line to gas supply (see
Figure 22). Check tightness of exible gas
line attached to gas regulator of replace (see
Figure 22).
6. Check all gas connections for leaks. See
Checking Gas Connections, page 16.
7. Replace log base assembly back into replace.
Feed exible gas line into replace base area
while replacing log base assembly. Make sure
the entire exible gas line is in replace base
area. Reattach log base assembly to replace
with screws removed in step 2.
Flexible Gas
Log Base
Line
Assembly
Screw
Screw
Unplug From
Remote Receiver
Module
Remote
Receiver
Module
Figure 21 - Removing Log Base
Assembly From Fireplace
To Fireplace Gas
Regulator
Equipment Shutoff
Valve Provided by
Installer
Flexible Gas Line from
Fireplace Gas Regulator
Propane/LP
To External Regulator
Natural Gas
To Gas Meter
Figure 22 - Attaching Flexible Gas Lines
Together
111604-01N15
www.desatech.com
Page 16
INSTALLATION
Continued
CHECKING GAS CONNECTIONS
WARNING: Test all gas pip-
ing and connections, internal
and external to unit, for leaks
after installing or servicing. Correct all leaks at once.
WARNING: Never use an
open ame to check for a leak.
Apply a noncorrosive leak detection uid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
replace. See guidelines under
Connecting Fireplace to Gas
Supply, page 15.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect replace with its appliance main
gas valve (control valve) and equipment
shutoff valve from gas supply piping system.
Pressures in excess of 1/2 psig will damage
replace regulator.
2. Cap off open end of gas pipe where equipment
shutoff valve was connected.
3. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas or opening main gas valve
located on or near gas meter for natural gas
or using compressed air.
4. Check all joints of gas supply piping system.
Apply noncorrosive leak detection uid to all
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect replace and equipment shutoff
valve to gas supply. Check reconnected ttings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1.
Close equipment shutoff valve (see Figure 23).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas or opening main gas valve
located on or near gas meter for natural gas
or using compressed air.
3. Check all joints from gas meter to equipment
shutoff valve for natural gas or propane/LP
su pply to eq uipme nt sh utoff valve fo r
propane/LP (see Figures 24 or 25). Apply
noncorrosive leak detection uid to all joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Equipment
Shutoff
Valve
Figure 23 - Equipment Shutoff Valve
Gas Control Valve
Figure 24 - Checking Gas Joints for
Natural Gas
Equipment Shutoff Valve
Gas Control Valve
Figure 25 - Checking Gas Joints for
Propane/LP Gas
Open
Closed
Equipment
Shutoff
Valve
Gas Meter
Propane/LP
Supply Tank
www.desatech.com
111604-01N16
Page 17
INSTALLATION
O
F
F
P
I
L
O
T
O
N
O
F
F
P
I
L
O
T
O
N
Continued
Pressure Testing Fireplace Gas
Connections
1. Open equipment shutoff valve (see Figure 23,
page 16).
2. Open main gas valve located on or near gas
meter for natural gas or open propane/LP
supply tank valve.
3. Make sure control knob of replace is in the
OFF position.
4. Check all joints from equipment shutoff valve
to gas control valve (see Figures 24 or 25, page
16). Apply noncorrosive leak detection uid
to all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light replace (see Operating Fireplace, page
20.) Check all other internal joints for leaks.
7. Turn off replace (see To Turn Off Gas to Appliance, page 21).
INSTALLING LOGS
Each log is marked with a number. These numbers
will help you identify the log when installing. It
is very important to install these logs exactly as
instructed. Do not modify logs. Only use logs
supplied with heater.
Models LMFP33PR and LMFP33NR
1. Place pins in rear log (#1) into holes on rear
of base grate as shown in Figure 26.
2. Place middle log (#2) between front and rear
of burner. The left side will rest on the left tab
and the right will straddle the burner as shown
in Figure 26.
3. Place front log (#3) onto grate ngers at front
of base grate (see Figure 27). Make sure log
seats well into grate.
4. Place left top log on left pins on logs #2 and #3,
resting it on log #1( see Figure 28, page 18).
5. Place right top log on right pins on logs #2
and #3 (see Figure 28, page 18).
Middle
Log (#2)
CAUTION: Do not remove the
data plates attached to the heater
base assembly. The data plates
contain important warranty and
safety information.
WARNING: Failure to position the parts in accordance
with these diagrams or failure
to use only parts specically
approved with this heater may
result in property damage or
personal injury.
WARNING: After installa-
tion and periodically thereafter,
check to ensure that no ame
comes in contact with any log.
With the heater set to High, check
to see if ame contact any log. If
so, reposition logs according to
the log installation instructions
in this manual. Flames contacting logs will create soot.
Rear Log
(#1)
Figure 26 - Installing Rear and Middle
Logs
Front Log (#3)
Figure 27 - Installing Front Log
111604-01N17
www.desatech.com
Page 18
O
F
F
P
I
L
O
T
O
N
INSTALLATION
Left Top Log (#4)
Continued
Right Top
Log (#5)
WARNING: You must operate
this replace with the replace
screen in place. Make sure replace screen is in place before
running replace.
Hole in
Grate
Base
Back Log (#2)
Peg
Figure 28 - Installing Top Logs
Models LMFP33PRA and LMFP33NRA
1. Place the base of the middle log (#1) in the
U-shaped slots of the grate base. The cutout
on the right of the middle log should t over
the burner (see Figure 29). Make sure the front
of the middle log is resting on the tabs of the
grate base and the cutout area is centered over
the burner “U” bend.
2. Locate pegs on the bottom of back log (#2).
Slide these pegs into the holes in the grate base
behind the burner (see Figure 30).
3.
Locate the notches in the bottom of the front
log (#3). Place the front log on the grate ngers. Make sure the notches of the front log
line up with the grate ngers (see Figure 31).
4. Place crossover log (#4) onto the pin (right) on
back log (#2) and into the recess of the middle
log (#1) (see Figure 32).
Middle
Middle
Log (#1)
Log (#1)
Tab
Burner
“U” Bend
Burner
Figure 30 - Installing Back Log (#2)
(Base may very from illustration)
Front Log
(#3)
Notches
Grate Finger
Figure 31 - Installing Front Log (#3)
(Base may very from illustration)
Crossover
Log (#4)
Peg
Figure 29 - Installing Middle Log (#1)
(Base may very from illustration)
U-Shaped
Slot
Figure 32 - Installing Crossover Log (#4)
www.desatech.com
Recess
(Base may very from illustration)
111604-01N18
Page 19
INSTALLATION
Continued
INSTALLING BATTERIES FOR
REMOTE RECEIVER AND HAND
HELD REMOTE CONTROL
Four AA batteries and three AAA batteries are
required to operate this heater with the wireless
hand-held remote control set. Four AA batteries
must be installed in the receiver and three AAA
batteries in the hand-held remote control unit.
Note: Only use alkaline batteries.
Installing Batteries in Receiver
1. Locate slot on battery cover of receiver (see
Figure 33). Firmly insert tool such as a small
screwdriver, butter knife or dime into the slot
and lift up to remove cover.
2. Insert 4 AA batteries into receiver. Positive
and negative are marked inside recei ver
casing. Note: Receiver will not function if
batteries are not installed correctly.
3. Slide tab on cover into receiver housing and
snap cover back into place.
Installing Battery into Remote
1. Remove remote cover (see Figure 34).
2. Insert 3 AAA batteries into remote control (see
Figure 34). Positive and negative are marked
inside remote control casing. Note: Remote
will not function if batteries are not installed
correctly.
3. Slide remote cover back into place.
3 AAA Batteries
Cover
Remote
Control
Figure 34 - Installing Batteries in Remote
Control
4 AA Batteries
Battery
Housing
Backup Switch
Figure 33 - Installing Batteries in
Receiver
Slot
Cover
Receiver
111604-01N19
www.desatech.com
Page 20
OPERATING HEATER
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a re or explosion may result
causing property damage, personal injury or loss of life.
A. This appliance has a pilot which must be
lighted by hand. When lighting the pilot,
follow these instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next
to the oor because some gas is heavier than
air and will settle on the oor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not
use any phone in your building.
• Immediately call your gas supplier from
a neigh bor’s ph one. Fo llow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call
the re department.
C. Use only your hand to push in or turn the
gas control knob. Never use tools. If the
knob will not push in or turn by hand, don’t
try to repair it, call a qualied service technician or gas supplier. Force or attempted
repair may result in a re or explosion.
D.
Do not use this appliance if any part has been
under water. Immediately call a qualied service technician to inspect the appliance and to
replace any part of the control system and any
gas control which has been under water.
LIGHTING
INSTRUCTIONS
WARNING
• If replace has glass doors,
never operate this heater with
glass doors closed. If you op-
erate heater with doors closed,
heat buildup inside replace
will cause glass to burst. Make
sure there are no obstructions
across opening of replace.
• You must operate this heater
with a fireplace screen in
place. Make sure fireplace
screen is closed before running heater.
NOTICE: During initial operation
of new heater, burning logs will
give off a paper-burning smell.
Orange ame will also be present. Open damper or window to
vent smell. This will only last a
few hours.
Note: Home owners generally prefer to operate
their heater with the chimney damper closed.
This will put all the heat into the room. However, there may be times you will desire the
full ames of the highest heat setting but will
nd the heat output excessive. You can open
the chimney damper (if you have one) fully or
partially to release some of the heat.
WARNING: Damper handle
will be hot if heater has been
running.
WARNING: Burners will
come on automatically within
one minute when the control
valve is in the ON position after
the pilot is lit.
www.desatech.com
111604-01N20
Page 21
AUTO MAN
OPERATING HEATER
Continued
1. STOP! Read the safety information on
page 20.
2. Make sure equipment shutoff valve is fully
open.
3. Set remote selector switch in the AUTO
position (see Figure 35).
4. Press in and turn control knob clockwise
to the OFF position (see Figure 35).
5. Wait ve (5) minutes to clear out any gas.
Then smell for gas, including near the oor.
If you smell gas, STOP! Follow “B” in the
safety information on page 20. If you don’t
smell gas, go to the next step.
6. Press in and turn control knob counterclockwise to the PILOT position.
Press in control knob for ve (5) seconds
(see Figure 35).
Note: You may be running this heater for
the rst time after hooking up to gas supply. If so, the control knob may need to be
pressed in for 30 seconds or more. This will
allow air to bleed from the gas system.
7. With control knob pressed in, press and
release ignitor button. This will light pilot.
The pilot is attached to the rear of the front
burner. If needed, keep pressing ignitor
button until pilot lights.
Note: If pilot does not stay lit, contact a
qualied service person or gas supplier for
repairs. Until repairs are made, light pilot
with match. To light pilot with match, see
Manual Lighting Procedure.
8. Keep control knob pressed in for 30 seconds
after lighting pilot. After 30 seconds, release
control knob.
• If control knob does not pop out when
released, contact a qualied service person
or gas supplier for repairs.
Note: If pilot goes out, repeat steps 4
through 8.
Ignitor Button
9. Slightly push in and turn control knob counterclockwise to the ON position.
10. Press the on/off key on the remote control
to turn on appliance main burner. Wait at
least 5 seconds before setting desired ame
height.
11. Press the up or down key until the small
triangle is to the left of large ame icon
at the top of LCD display (see Figure 38,
page 22). Press the left or right key to set
the desired ame height.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
Pilot Burner
Figure 36 - Pilot (Propane/LP)
Pilot Burner
Figure 37 - Pilot (Natural)
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
Press on/off key on remote control and turn
control knob clockwise to the OFF position (see Figure 35).
Shutting Off Burners Only (pilot stays lit)
Press the on/off key on remote control or turn
control knob clockwise to the PILOT
position.
Ignitor
Electrode
Ignitor
Electrode
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 7 under Lighting
Instructions, column 1.
2. Depress control knob and light pilot with
Control Knob
Figure 35 - Remote Selector Switch,
Control Knob and Ignitor Button
111604-01N21
Remote Selector
Switch
www.desatech.com
match.
3. Keep control knob pressed in for 30 seconds
after lighting pilot. After 30 seconds, release
control knob. Now follow steps 9 through
11 under Lighting Instructions.
Page 22
OPERATING HEATER
Continued
HAND-HELD
REMOTE OPERATION
NOTICE: You must light the pilot
before using the hand-held remote control unit. See Lighting Instructions, page 20.
When the appliance and the remote control
are switched off, the house icon with the room
temperature will be displayed. When the remote control is turned on, other icons will be
visible and the main burner of the appliance
will turn on.
1. Turn control knob clockwise to the
ON position (see Figure 35, page 21).
2. Press the ON button on remote control
(see Figure 38). Wait 5 seconds to send a
command to appliance.
Note: An acoustic signal will be heard that
conrms the reception of the command sent
from the remote control.
Setting Flame Height
Press the up or down key until the small triangle
is to the left of large ame icon at the top of
LCD display (see Figure 38). Press the left or
right key to set the desired ame height. Six
ame levels are available from 1 (minimum)
to 6 (maximum).
Small Triangle
Icon (Function
Indicator)
Flame Height
Indicator
Thermometer
Icon
Clock Icon
Left and
Right Keys
Increase and
Decrease
Set Points
LCD Display
Room
Temperature
Display
Sleep Timer
Display
Lock-Out
Indicator
Low Battery
Indicator
Setting Room Temperature
Press the up or down key until the smal l
triangle is to the left of the thermometer icon
(see Figure 38). Press the left or right key to
set the desired room temperature.
Setting Timer (Sleep Function)
Press the up or down key until the small triangle
is to the left of the clock icon (see Figure 38).
Press the left or right key to set the desired
sleep time. Maximum sleep time is 90 minutes,
in 15 minute increments. When desired time is
set, press the up or down key to start the timer.
When the desired time has elapsed, the appliance will automatically switch off.
Child Safety Lock-Out
To lock the remote control keys, press the
On/Off key then immediately press the up key
(see Figure 38). The lock-out function is active
when the lock icon is lit. Repeat key sequence
to unlock keys.
Low Battery Detection and Backup
A battery icon will be displayed on the LCD
display when batteries are low in the remote
control (see Figure 38).
When the re cei ver detects a low battery
condition;
• Three acoustic “beeps” are generated from
the receiver
• Appliance is turned off and will go to the
maximum ame height
• Execution of commands is inhibited until
batteries are replaced
When batteries are low, it is not possible to
turn on the appliance with the remote control.
Appliance can be turned on or off manually
by setting the backup switch of the receiver to
MAN position (see Figure 35, page 21). Remote
control and receiver will restart normal operation after batteries are replaced. See Installing
Batteries for Remote Receiver and Hand Held
Remote Control, page 19.
Timeout
If appliance is turned on and no command is
sent to the receiver for 24 hours, appliance will
automatically shut down. Commands sent after
shutdown will be executed normally.
On/Off
Button
Figure 38 - Remote Control
Up and Down Keys Moves
Placement from Top to
Bottom on LCD Display
www.desatech.com
111604-01N22
Page 23
INSPECTING bURNERS
Check pilot ame pattern and burner ame patterns often.
PILOT FLAME PATTERN
Figure 39 shows a correct pilot ame pattern.
Figure 40 shows an incorrect pilot ame pattern.
The incorrect pilot ame is not properly heating
the thermocouple. When the thermocouple cools,
the heater will shut down.
If pilot ame pattern is incorrect, as shown in
Figure 40
• turn heater off (see To Turn Off Gas to Appli-ance, page 21)
• see Troubleshooting, page 25
Note: The pilot ame on a natural gas units will
have a slight curve, but ame should be blue and
have no yellow or orange color.
Thermocouple
Propane/LP Gas Pilot
Pilot Burner
Natural Gas Pilot
Figure 39 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Pilot Burner
Thermocouple
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in
the tting at the burner entrance. These holes may
become blocked with dust or lint. Periodically
inspect these holes for any blockage and clean if
needed. Blocked air holes will create soot.
MAIN BURNER
Periodically inspect all burner ame holes with the
replace running. All slotted burner ame holes
should be open with yellow ame present. All round
burner ame holes should be open with a small blue
ame present. Some burner ame holes may become
blocked by debris or rust, with no ame present. If
so, turn off replace and let cool. Remove blockage.
Blocked burner ame holes will create soot.
BURNER FLAME PATTERN
WARNING: If yellow tipping
occurs, your replace could
produce increased levels of
carbon monoxide.
NOTICE: Do not mistake orange
ames with yellow tipping. Dirt
or other ne particles enter the
replace and burn causing brief
patches of orange ame.
Figure 41 shows a correct burner ame pattern. Figure 42 shows an incorrect burner ame pattern. The
incorrect burner ame pattern shows the ame higher
consistently higher than 1 inch above the logs.
If burner ame pattern is incorrect, as shown in
Figure 42
• turn heater off (see To Turn Off Gas To Appli-ance, page 21)
• see Troubleshooting, page 25
Propane/LP Gas Pilot
Pilot Burner
Thermocouple
Figure 41 - Correct Burner Flame Pattern
Yellow Tipping
Natural Gas Pilot
Figure 40 - Incorrect Pilot Flame Pattern
111604-01N23
www.desatech.com
Figure 42 - Incorrect Burner Flame Pattern
Page 24
CLEANING AND
MAINTENANCE
WARNING: Turn off replace
and let cool before cleaning.
CAUTION: You must keep
control areas, burner and circulating air passageways of
replace clean. Inspect these
areas of replace before each
use. Have replace inspected
yearly by a qualied service
person. Fireplace may need
more frequent cleaning due to
excessive lint from carpeting,
bedding material, pet hair, etc.
WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clean may result in
sooting and property damage.
BURNER INJECTOR HOLDER AND
PILOT AIR INLET HOLE
The primary air inlet holes allow the proper amount
of air to mix with the gas. This provides a clean
burning ame. Keep these holes clear of dust, dirt,
lint and pet hair. Clean these air inlet holes prior to
each heating season. Blocked air holes will create
soot. We recommend that you clean the unit every
three months during operation and have heater
inspected yearly by a qualied service person.
We also recommend that you keep the burner
tube and pilot assembly clean and free of dust and
dirt. To clean these parts we recommend using
compressed air no greater than 30 PSI. Your local
computer store, hardware store or home center
may carry compressed air in a can. You can use a
vacuum cleaner in the blow position. If using compressed air in a can, please follow the directions on
the can. If you don’t follow directions on the can,
you could damage the pilot assembly.
1. Shut off the unit, including the pilot. Allow
the unit to cool for at least thirty minutes.
2. Inspect burner, pilot and primary air inlet holes
on injector holder for dust and dirt (see Figures
43 and 44).
3. Blow air through the ports/slots and holes in
the burner.
www.desatech.com
4. Check the injector holder located at the end
of the burner tube again. Remove any large
particles of dust, dirt, lint or pet hair with a
soft cloth or vacuum cleaner nozzle.
5. Blow air into the primary air holes on the
injector holder.
6. In case any large clumps of dust have now been
pushed into the burner repeat steps 3 and 4.
Clean the pilot assembly also. A yellow tip on the
pilot ame indicates dust and dirt in the pilot as-
sembly. There is a small pilot air inlet hole about
two inches from where the pilot ame comes out
of the pilot assembly (see Figure 44). With the unit
off, lightly blow air through the air inlet hole. You
may blow through a drinking straw if compressed
air is not available.
Burner
Tube
Injector Holder (May Be Brass or
Aluminum Depending on Model)
Figure 43 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Pilot
Assembly
Pilot Air
Inlet Hole
Figure 44 - Pilot Inlet Air Hole
Primary Air Inlet
Holes (Shape of
Holes May Vary
by Model)
Ports/Slots
LOGS
• If you remove logs for cleaning, refer to Install-
ing Logs, page 17, to properly replace logs.
• Replace log(s) if broken or chipped (dime-sized
or larger).
111604-01N24
Page 25
TROUbLESHOOTING
WARNING: Turn off heater and let cool before servicing. Only a
qualied service person should service and repair heater.
CAUTION: Never use a wire, needle or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
OBSERVED PROBLEM
When ignitor button is pressed,
there is no spark at ODS/pilot
When ignitor button is pressed,
there is spark at ODS/pilot but
no ignition
POSSIBLE CAUSE
1. Ign ito r elec tro de not con-
nected to ignitor cable
2. Ignitor cable pinched or wet
3. Piezo ignitor nut is loose
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ignitor electrode positioned
wrong
7. Ignitor electrode broken
1. Gas supply turned off or equipment shutoff valve closed
2. Control knob not in PILOT
position
3. Control knob not pressed in
while in PILOT position
4.
Air in gas lines when installed
5. Depleted gas supply (propane/
LP only)
6. ODS/pilot is clogged
7. Gas regulator setting is not
correct
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched
by any metal or tubing. Keep
ignitor cable dry
3.
Tighten nut holding piezo ignitor to base panel of log set. Nut
is located behind base panel
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace pilot assembly
7. Replace pilot assembly
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while in
PILOT position
4. Continue holding down control knob. Repeat igniting operation until air is removed
5. Contact local propane/LP gas
company
6.
Clean ODS/pilot (see Cleaning
and Maintenance, page 24) or
replace ODS/pilot assembly
7. Replace gas regulator
111604-01N25
www.desatech.com
Page 26
OBSERVED PROBLEM
ODS/pilot lights but ame goes
out when control knob is re-
leased
TROUbLESHOOTING
Continued
POSSIBLE CAUSE
1.
Control knob not fully pressed in
2. Control knob not pressed in
long enough
3. Equipment shutoff valve not
fully open
4. Pilot ame not touching thermocouple, which allows thermoc oupl e to cool, caus ing
pilot flame to go out. This
problem could be caused by
one or both of the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
5. Thermoco upl e con nection
loose at control valve
6. Thermocouple damaged
7. Control valve damaged
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds
3. Fully open equipment shutoff
valve
4. A) Contact local natural or
propane/LP gas company
B ) Cl ea n ODS/pilot (s ee
Cleaning and Maintenance,
page 24) or replace ODS/pilot
assembly
5. Hand tighten until snug, then
tighten 1/4 turn more
6. Replace pilot assembly
7. Replace control valve
Burner does not light after ODS/
pilot is lit
Delayed ignition of one or both
burners
Burner backring during combustion
1. Inlet gas pressure is too low
2. Burner orice(s) clogged
3. Thermopile leads disconnect-
ed or improperly connected
4. Burner will not come on in
remote position
1. Manifold pressure is too low
2. Burner orice(s) clogged
1. Burner orice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
1. Contact local natural or pro-
pane/LP gas company
2. Clean burner(s) (see Cleaning
and Maintenance, page 24) or
replace burner orice(s)
3. Reconnect leads (see Wiring Diagram, page 29)
4. Replace battery in transmitter
and receiver
1. Contact local natural or pro-
pane/LP gas company
2. Clean burner(s) (see Cleaning
and Maintenance, page 24) or
replace burner orice(s)
1. Clean burner (see Cleaning and Maintenance, page 24) or
replace burner orice(s)
2. Replace damaged burner
3. Replace gas regulator
www.desatech.com
111604-01N26
Page 27
OBSERVED PROBLEM
Slight smoke or odor during initial
operation
Moisture/condensation noticed
on windows
TROUbLESHOOTING
Continued
POSSIBLE CAUSE
1. Not enough air
2. Gas regulator defective
3. Residues from manufacturing
processes and logs curing
REMEDY
1. Che ck bur ner for dirt and
debris. If found, clean burner
(see Cleaning and Mainte-nance, page 24)
2. Replace gas control
3. Problem will stop after a few
hours of operation
Heater produces a whistling noise
when burners are lit
White powder residue forming
within burner box or on adjacent
walls or furniture
Remote does not function
Fireplace produces a clicking/
ticking noise just after burner is
lit or shut off
1. Not enough combustion/ven-
tilation air
1. Turning control knob to HI position when burners are cold
2. Air in gas line
3. Air passageways on heater
blocked
4. Dir ty or partially clo gge d
burner orice(s)
1. When heated, vapors from
furniture polish, wax, carpet
cleaners, etc. may turn into
white powder residue
1. Battery is not installed. Bat-
tery power is low
1. Metal expanding while heating
or contracting while cooling
1. Refer to Air for Combustion and Ventilation requirements
(page 5)
1. Tur n co ntrol kno b to LO
position and let warm up for
a minute
2. Operate burners until air is
removed from line. Have gas
line checked by local natural
or propane/LP gas company
3. Observe minimum installation
clearances (see page 9)
4. Clean burners (see Cleaning and Maintenance, page 24)
or replace burner orice(s)
1. Turn heater off when using
furniture polish, wax, carpet
cleaners or similar products
1. Replace 9-volt batteries in
receiver and remote control
1. This is normal with most heaters. If noise is excessive, contact
qualied service person
111604-01N27
www.desatech.com
Page 28
TROUbLESHOOTING
Continued
WARNING: 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.
IMPORTANT: Operating replace where impurities in air exist may create odors. Cleaning supplies,
paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes. These
fumes may mix with combustion air and create odors. These odors will disappear over time.
OBSERVED PROBLEM
Fireplace produces unwanted
odors
Fireplace shuts off in use (ODS
operates)
Gas odor even when control knob
is in OFF position
Gas odor during combustion
POSSIBLE CAUSE
1. Heater burning vapors from
paint, hair spray, glues, cleaners, chemicals, new carpet,
etc. (See IMPORTANT state-
ment above)
2. Low fuel supply (propane/LP
only)
3. Gas leak. See Wa rni ng
statement above
1. Not enough fresh air is available
2. Low line pressure
3. ODS /p i lo t i s p ar t ial l y
clogged
1. Gas leak. See Wa rni ng
statement above
2. Control valve or gas control
defective
1. Foreign matter between control valve and burner
2. Gas leak. See Wa rni ng
statement above
REMEDY
1. Open window to ventilate
room. Stop using odor caus-
ing products while heater is
running
2. Rell supply tank (propane/
LP only)
3. Locate and correct all leaks
(see Checking Gas Connec-tions, page 16)
1. Open window and/or door for
ventilation
2. Contact local natural or pro-
pane/LP gas company
3. Clean ODS/pilot (see Cleaning
and Maintenance, page 24)
1. Locate and correct all leaks
(see Checking Gas Connec-tions, page 16)
2. Replace control valve or gas
control
1. Take apart gas tubing and
remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Connec-tions, page 16)
Dark residue on logs inside
of their replace Note: After
removing all causes of residue
deposits, completely clean replace and appliance off residue
before reusing appliance
1. Improper log placement
2. Drafts or other air currents
affecting ame pattern
3. Air hol es at burne r inlet
blocked
4. Burner ame holes blocked
www.desatech.com
1. Pro perly loc ate logs (see
Installing Logs, page 17)
2. Eliminate source of drafts
around heater
3.
Clean out air holes at burner inlet.
Periodically repeat as needed
4. Remove blockage
111604-01N28
Page 29
SPECIFICATIONS
LMFP33NR(A) LMFP33PR(A)
Btu (Variable) 23,000/33,000 23,000/33,000
Type Gas Natural Gas Propane/LP
Ignition Piezo Piezo
Pressure Manifold 3.5" W.C. 7.9" W.C.
Inlet Gas Pressure (in. of water)
Maximum 10.5" 14"
Minimum* 5.5" 11"
Shipping Weight 122 lbs. 122 lbs.
* For input adjustment
WIRING DIAGRAM
Red
Black
Red
White
TECHNICAL SERVICE
You may have further questions about installation,
operation or troubleshooting. If so, contact DESA
Heating Products’ Technical Service Department at
1-866-672-6040. When calling, please have your
model and serial numbers of your heater ready.
You can also visit DESA Heating Products’ technical services web site at www.desatech.com.
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• replace will not produce specied heat
• for propane/LP unit, propane/LP gas supply
may be low
You may feel your gas pressure is too low. If so,
contact your local gas supplier.
REPLACEMENT PARTS
Note: Use only original replacement parts. This
will protect your warranty coverage for parts
replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA Heating Products’ Technical Service
Department at 1-866-672-6040. When calling
DESA Heating Products, have ready
• your name and address
• model and serial numbers of your replace
• how replace was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
Usually, we will ask you to return the part to the
factory.
PARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If they
can’t supply original replacement part(s), call
DESA Heating Products at 1-866-672-6040 for
referral information. When calling DESA Heating
Products, have ready
• model number of your replace
• the replacement part number
111604-01N29
www.desatech.com
Page 30
ILLUSTRATED PARTS bREAkDOWN
17
4
8
12
25
20
21
7
6
4
3
2
5
9
27
14
13
15
16
22
11
10
19
23
18
24
28
1b
1a
1c
1d
26
1b
1a
1c
1d
1e
“A Models”
MODELS
LMFP33PR, LMFP33PRA, LMFP33NR AND LMFP33NRA (SHOWN)
www.desatech.com
111604-01N30
Page 31
PARTS LIST
This list contains replaceable parts used in your replace. When ordering parts, follow the instructions
listed under Replacement Parts on page 29 of this manual.
This list contains replaceable parts used in your replace. When ordering parts, follow the instructions
listed under Replacement Parts on page 29 of this manual.
KEY
NO. PART NO. DESCRIPTIONQTY.
1101357-03Top Outer Casing1
2 **Outer Casing1
3 **Right Front Side1
4 **Left Front Side1
5098304-01Phillips Pan Head Screw, #10-16 x 0.389
6104239-01CK Top Front Louver1
7101712-03Firebox Hood1
8 **Firebox Support2
9099230-02Shoulder Screw4
10 **Firebox Top1
11 101346-01Outer Base1
12 **Firebox Wrapper 1
13 101514-01Cover1
14 M11084-26Hex Screw, #10-16 x 0.3845
15 104237-01CK Bottom Louvered Door1
16 101727-02Screen Assembly1
101386-02Louvered Door Hinge2
101784-01Magnet Catch2
102307-01Strike Plate2
** Not a eld replaceable part.
PARTS AVAILABLE — NOT SHOWN
111604-01N33
www.desatech.com
Page 34
ACCESSORIES
NOTICE: All accessories may
not be available for all replace
models.
Purchase these replace accessories from your local dealer. If they can not supply these accessories,
call DESA Heating Products’ Sales Department
at 1-866-672-6040 for information. You can also
write to the address listed on the back page of
this manual.
EQUIPMENT SHUTOFF VALVE
GA5010
For all models. Equipment shutoff valve with 1/8"
NPT tap. Fits 1/2" NPT pipe.
BLOWER ACCESSORY - GA3750A
AND GA3650TB SERIES
For all models. Manual variable control and
automatic thermostat variable control. A blower
will increase air ow to assist heat distribution
from the rebox.
FIREBOX BRICK LINER - G8005
Series (Not Shown)
For all models. Ceramic ber rebox liner adds
the look of real brick.
INFORMATION VIDEO - 108917-01
For all models. A care and maintenance video is
available by calling 1-866-672-6040. You may
also email your request to
productsupport@desaint.com.
CABINET MANTEL AND FULL
HEARTH BASE (Not Shown)
W32AU - Unnished Oak, Traditional
W32AOS - Oak Finished, Traditional
CMA311WA - Painted White, Traditional
with Dentil Molding
CMA306FA - Oak Finished, Traditional
with Dentil Molding
CMA312FB - Dark Oak Finished, Classic
W32KCSA - Cherry Finished, Neo-Classical
W32KPA - Painted White, Neo-Classical
CMA305UA - Unnished Oak , Georgian
GMC90FA - Oak Finished, Georgian
W32DS - Red Oak Finished, Keystone
W32GOSA - Dark Oak Finished, Mission
For all models. Three-sided perimeter trim
included.
CORNER CABINET MANTEL AND
FULL HEARTH BASE (Not Shown)
C32AU - Unnished Oak, Traditional
C32AOS - Oak Finished, Traditional
C32HS - Dark Oak Stained, Classic
For all models. Three-sided perimeter trim
included.
DUPLEX OUTLET KIT - GA3555
(Not Shown)
For all models. For built-in installation when
accessory blowers are used.
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specications at any time without notice. The only warranty applicable is our
standard written warranty. We make no other warranty, expressed or implied.
LIMITED WARRANTy
VENT-FREE GAS FIREPLACE
DESA Heating Products warrants this product to be free from defects in materials and components for two (2)
years from the date of rst purchase, provided that the product has been properly installed, operated and maintained
in accordance with all applicable instructions. To make a claim under this warranty the Bill of Sale or cancelled
check must be presented.
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required
to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Heating
Products Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product
and/or DESA Heating Products who will provide original factory replacement parts. Failure to use original factory
replacement parts voids this warranty. The heater MUST be installed by a qualied installer in accordance with
all local codes and instructions furnished with the unit.
This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts
that fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by
improper installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related to
repairing a defective heater will be the responsibility of the owner.
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE
OF THE PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED
WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO
(2) YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA HEATING
PRODUCTS’ LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND
DESA HEATING PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER
INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of
incidental or consequential damages, so the above limitation on implied warranties or exclusion or limitation on
damages may not apply to you.
This warranty gives you specic legal rights and you may also have other rights that vary from state to state.