®
VENT-FREE COMPACT FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
Shown with Optional Cabinet Mantel/Hearth Base Accessory
MODELS VMH26TPC AND VMH26TNC
14,000 to 26,000 Btu/Hr with Thermostat
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a quali-
fied installer, service agency, or the gas supplier.
Save this manual for future reference.
For more information, visit www.desatech.com
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual for correct installation
and operational procedures. For assistance or additional information consult a qualified installer, service
agency, or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses
air (oxygen) from the room in which it is installed.
Provisions for adequate combustion and ventilation air
must be provided. Refer to
Ventilation
section on page 6 of this manual.
Air for Combustion and
This appliance may be installed in an aftermarket,*
permanently located, manufactured (mobile) home,
where not prohibited by local codes.
This appliance is only for use with the type of gas
indicated on the rating plate. This appliance is not
convertible for use with other gases.
* Aftermarket: Completion of sale, not for purpose of resale, from the
manufacturer
TABLE OF CONTENTS
Safety Information ............................................... 3
Local Codes ........................................................ 4
Product Identification .......................................... 4
Product Features ................................................ 5
Unpacking ........................................................... 5
Assembly ............................................................ 5
Air for Combustion and Ventilation...................... 6
Installation ........................................................... 9
Operating Fireplace .......................................... 19
Inspecting Burner .............................................. 21
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Cleaning and Maintenance ............................... 22
Troubleshooting ................................................ 23
Specifications .................................................... 27
Service Hints ..................................................... 27
Technical Service .............................................. 27
Replacement Parts ........................................... 27
Illustrated Parts Breakdown and Parts List ....... 28
Accessories ....................................................... 30
Warranty Information.......................... Back Cover
SAFETY INFORMATION
WARNING: This product contains and/or generates chemicals
known to the state of California
to cause cancer or birth defects,
or other reproductive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate, or service this fireplace. Improper use of this fireplace can
cause serious injury or death
from burns, fire, explosion, electrical shock, and carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of car-
bon monoxide poisoning resemble the flu, with headaches, dizziness, or nausea. If you have these signs,
the fireplace may not be working properly. Get fresh
air at once! Have fireplace serviced. Some people
are more affected by carbon monoxide than others.
These include pregnant women, people with heart
or lung disease or anemia, those under the influence
of alcohol, and those at high altitudes.
Natural and Propane/LP Gas:
gases are odorless. An odor-making agent is added to
these gases. The odor helps you detect a gas leak.
However, the odor added to the gas can fade. Gas
may be present even though no odor exists.
Make certain you read and understand all warnings. Keep this manual for reference. It is your
guide to safe and proper operation of this fireplace.
WARNING: Any change to
this heater or its controls can be
dangerous.
Natural and propane/LP
WARNING: Do not use a
blower insert, heat exchanger
insert, or other accessory not
approved for use with this fireplace.
Due to high temperatures, the
appliance should be located out
of traffic and away from furniture and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects in the fireplace.
Fireplace front and screen become very hot when running fireplace. 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 children when they are in the room
with fireplace.
You must operate this fireplace
with the fireplace screen and
hood in place. Make sure fireplace screen is in place before
running fireplace.
Keep the appliance area clear
and free from combustible materials, gasoline, and other flammable vapors and liquids.
WARNING: Do not allow fans
to blow directly into the fireplace.
Avoid any drafts that alter burner
flame patterns. Ceiling fans can
create drafts that alter burner
flame patterns. Altered burner
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 only).
patterns can cause sooting.
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SAFETY INFORMATION
Continued
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 fire department
4. This fireplace shall not be installed in a bedroom or bathroom.
5. Do not use this fireplace as a wood-burning
fireplace. Use only the logs provided with the
fireplace.
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 fireplace.
7. This fireplace is designed to be smokeless. If
logs ever appear to smoke, turn off fireplace
and call a qualified service person.
ing initial operation, slight smoking could
occur due to log curing and fireplace burning
manufacturing residues.
8. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 22.
9. 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.
10. This fireplace needs fresh air ventilation to
run properly. This fireplace has an Oxygen
Depletion Sensing (ODS) safety shutoff system. The ODS shuts down the fireplace if not
enough fresh air is available. See Air for Com-
bustion and Ventilation, pages 6 through 8. If
fireplace keeps shutting off, see Troubleshoot-
ing, pages 23 through 26.
11. Do not run fireplace
• where flammable liquids or vapors are used
or stored.
• under dusty conditions.
12. Do not use this fireplace to cook food or burn
paper or other objects.
4
Note:
Dur-
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13. Do not use fireplace if any part has been under
water. Immediately call a qualified service technician to inspect the room fireplace and to replace any part of the control system and any
gas control which has been under water.
14. Turn off and unplug fireplace and let cool before servicing. Only a qualified service person should service and repair fireplace.
15. Operating fireplace above elevations of 4,500
feet could cause pilot outage.
16. Do not operate fireplace if any log is broken.
Do not operate fireplace if a log is chipped
(dime-sized or larger).
17. To prevent performance problems, do not use
propane/LP fuel tank of less than 100 lbs. capacity (propane/LP only).
18. Provide adequate clearances around air
openings.
LOCAL CODES
Install and use fireplace 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
PRODUCT
IDENTIFICATION
Fireplace
Cabinet
Screen
Logs
Control Knob
Ignitor Button
Figure 1 - Vent-Free Gas Compact
Fireplace
PRODUCT FEATURES
SAFETY PILOT
This fireplace has a pilot with an Oxygen Depletion Sensing (ODS) safety shutoff system. The
ODS/pilot is a required feature for vent-free room
fireplaces. The ODS/pilot shuts off the fireplace
if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This fireplace has a piezo ignitor. This system requires no matches, batteries, or other sources to
light fireplace.
THERMOSTATIC HEAT CONTROL
This fireplace has a thermostat sensing bulb and a
control valve. The thermostat will automatically
modulate the heat output to maintain a consistent
room temperature. This results in greater fireplace
comfort. This can also result in lower gas bills.
UNPACKING
1. Remove fireplace and hood from carton. Log
is wrapped and inside fireplace. Do not remove at this time.
2. Remove all protective packaging applied to
fireplace for shipment.
3. Make sure your fireplace includes one hardware packet.
4. Check fireplace for any shipping damage. If
fireplace is damaged, promptly inform dealer
where you bought fireplace.
ASSEMBLY
WARNING: Always have
branch support and screen in
place before operating fireplace.
This prevents excessive temperatures on fireplace surfaces.
WARNING: Failure to position
the parts in accordance with these
diagrams or failure to use only
parts specifically approved with
this fireplace may result in property damage or personal injury.
ASSEMBLING FIREPLACE
Tools Required:
• Phillips screwdriver
• 5/16" hex wrench
• slotted screwdriver
Installing Log
1. Lift screen up and pull out to remove.
2. Cut two plastic straps to remove the log from
the firebox cavity.
3.
An optional blower is available. See Accessories,
page 30. Install optional blower now. Follow installation instructions provided with blower.
4. Remove log packaging material and discard
packaging. Gently place log set on burner support (see Figure 2). The log should fit flat
against top of burner support and log locator
tabs fit into the slots under the log. Do not
allow log to contact flame. If flame contacts
log, soot will be created.
Log
Shoulder
Screw
Burner Support
with Log
Locator Tabs
Branch
Support
Screen
Figure 2 - Assembling Fireplace
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ASSEMBLY
Continued
5. Reattach screen by placing the notches in the
screen frame over the shoulder screws and
pushing down.
Assembling Hood
1. Locate four black phillips sheet metal screws
from the hardware packet.
2. Rotate hood as shown in Figure 3. Make sure
hood tabs point toward fireplace.
3. Insert hood tabs between baffle and louvers
(see Figure 3).
4. Gently rotate hood to upright position. Make
sure hood tabs are behind louvers and hood is
resting on firebox top (see Figure 3).
5. Align screw holes on hood with screw holes
on firebox top.
6. Insert screws as shown in Figure 3. Tighten
screws firmly.
Louver
Hood Tabs
Hood
Sheet Metal
Screw
Figure 3 - Assembling Hood
Hood Tab
Baffle
Firebox Top
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a confined space
or unusually tight construction
unless provisions are provided
for adequate combustion and ventilation air. Read the following instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Today’s homes are built more energy efficient than
ever. New materials, increased insulation, and new
construction methods help reduce heat loss in
homes. Home owners weather strip and caulk
around windows and doors to keep the cold air out
and the warm air in. During heating months, home
owners want their homes as airtight as possible.
While it is good to make your home energy efficient, your home needs to breathe. Fresh air must
enter your home. All fuel-burning appliances need
fresh air for proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and fuel
burning appliances draw air from the house to
operate. You must provide adequate fresh air for
these appliances. This will insure proper venting
of vented fuel-burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code,ANSI Z223.1/ NFPA 54, Section 5.3, Air
for Combustion and Ventilation.
All spaces in homes fall into one of the three following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 6 through 8 will help
you classify your space and provide adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may
provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight
construction, you must provide additional fresh air.
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AIR FOR COMBUSTION
AND VENTILATION
Continued
Unusually tight construction is defined as
construction where:
a. walls and ceilings exposed to the out-
side atmosphere have a continuous
water vapor retarder with a rating of
one perm (6 x 10
or less 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 ar-
eas such as joints around window and
door frames, between sole plates and
floors, between wall-ceiling joints, between wall panels, at penetrations for
plumbing, electrical, and gas lines, and
at other openings.
If your home meets all of the three criteria
above, you must provide additional fresh
air. See
Ventilation Air From Outdoors
page 8.
If your home does not meet all of the three
criteria above, proceed to
Fresh-Air Flow For Fireplace Location
Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1.3/
NFPA 54 defines a confined space as a space whose
volume is less than 50 cubic feet per 1,000 Btu
per hour (4.8 m3 per kw) of the aggregate input
rating of all appliances installed in that space and
an unconfined space as a space whose volume is
not less than 50 cubic feet per 1,000 Btu per hour
(4.8 m3 per kw) of the aggregate input rating of all
appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.
* Adjoining rooms are communicating only if there
are doorless passageways or ventilation grills between them.
-11
kg per pa-sec-m2)
Determining
.
DETERMINING FRESH-AIR FLOW
FOR FIREPLACE LOCATION
Determining if You Have a Confined or
Unconfined Space
Use this work sheet to determine if you have a
confined or unconfined space.
Space: Includes the room in which you will install
fireplace 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:
(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:
51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in
the space.
Vent-free fireplace __________ Btu/Hr
Gas water heater* __________ Btu/Hr
Gas furnace __________ Btu/Hr
Vented gas heater __________ Btu/Hr
Gas fireplace 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.
Example:
Gas water heater ______________ Btu/Hr
Vent-free fireplace ______________ Btu/Hr
Total ______________ Btu/Hr
4. Compare the maximum Btu/Hr the space can
support with the actual amount of Btu/Hr used.
________
________
Example:
The space in the above example is a confined space
because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows:
Space size 20 ft. (length) x 16 ft.
2560 cu. ft. (volume of space) x 20 =
30,000
+ 26,000
= 56,000
Btu/Hr (maximum the space can support)
Btu/Hr (actual amount of Btu/Hr used)
51,200 Btu/Hr (maximum the space
can support)
56,000 Btu/Hr (actual amount of
Btu/Hr used)
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AIR FOR COMBUSTION
AND VENTILATION
Continued
A. Rework worksheet, adding the space of an adjoin-
ing room. If the extra space provides an unconfined space, remove door to adjoining room or add
ventilation grills between rooms. See Ventilation
Air From Inside Building.
B. Vent room directly to the outdoors. See Ventila-
tion Air From Outdoors.
C. Install a lower Btu/Hr fireplace, if lower Btu/Hr
size makes room unconfined.
If the actual Btu/Hr used is less than the maximum
Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.
WARNING: If the area in
which the heater may be operated is smaller than that defined
as an unconfined space or if the
building is of unusually tight
construction, provide adequate
combustion and ventilation air
by one of the methods described
in the
ANSI Z223.1/NFPA 54 Section
5.3
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining
unconfined space, you must provide two permanent openings: one within 12" of the ceiling and
one within 12" of the floor on the wall connecting
the two spaces (see options 1 and 2, Figure 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, Section 5.3, Air for
Combustion and Ventilation for required size of
ventilation grills or ducts.
National Fuel Gas Code,
or applicable local codes
.
12"
Ventilation Grills
Ventilation
Grills
into Adjoining
Room,
Option 1
Or
Remove
Door into
Adjoining
Room,
Option 3
Into Adjoining Room,
12"
Option 2
Figure 4 - Ventilation Air from Inside
Building Shown with Optional Mantel
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills
or ducts. You must provide two permanent openings: one within 12" of the ceiling and one within
12" of the floor. Connect these items directly to
the outdoors or spaces open to the outdoors. These
spaces include attics and crawl spaces. Follow the
National Fuel Gas Code, ANSI Z223.1/NFPA 54,
Section 5.3, Air for Combustion and Ventilation
for required size of ventilation grills or ducts.
IMPORTANT:
Do not provide openings for inlet
or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic
will activate the power vent.
Ventilated
Attic
Crawl Space
Ventilated
To Attic
To
Crawl
Space
Outlet
Air
Inlet
Air
Outlet
Air
Inlet Air
Figure 5 - Ventilation Air from Outdoors
Shown with Optional Mantel
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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 qualified service person must install fireplace. Follow all local codes.
WARNING: Never install the
fireplace
• in a bedroom or a bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36 inches
from the front, top, or sides of
the fireplace
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
CAUTION: This fireplace creates warm air currents. These
currents move heat to wall surfaces next to fireplace. Installing fireplace next to vinyl or cloth
wall coverings or operating fireplace where impurities (such as,
but not limited to, tobacco
smoke, aromatic candles, cleaning fluids, oil or kerosene lamps,
etc.) in the air exist, may discolor walls or cause odors.
IMPORTANT:
to the air. Although this is beneficial, installing
fireplace in rooms without enough ventilation air
may cause mildew to form from too much moisture. See Air for Combustion and Ventilation, pages
6 through 8.
Note:
Your Vanguard fireplace is designed to be
used in zero clearance installations. Wall or framing material can be placed directly against any
exterior surface of your fireplace, except where
standoff spacers are integrally attached. If standoff spacers are attached to your fireplace, 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 Fire-
place Installation, page 10).
Vent-free fireplaces add moisture
CHECK GAS TYPE
Use only the correct type of gas (natural or propane/LP). If your gas supply is not the correct gas
type, do not install heater. Call dealer where you
bought heater for proper type heater.
WARNING: This appliance
is equipped for (natural or propane/LP) gas. Field conversion
is not permitted.
INSTALLATION ITEMS
Before installing fireplace, make sure you have
the items listed below.
• external regulator - propane/LP only (supplied
by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection*
• ground joint union
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certified equipment shutoff valve from your
dealer. See Accessories, page 30.
Note:
If desired, purchase a four-sided trim kit for
built-in installations. See Accessories, page 30.
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INSTALLATION
Continued
LOCATING FIREPLACE
WARNING: Maintain the
minimum clearances shown in
Figures 6 and 7. If you can, provide greater clearances from
floor, ceiling, and joining wall.
You can recess firebox into the wall. You can also
position fireplace in the optional cabinet or corner mantels.
cabinet or corner mantels specified in this manual.
Purchase the optional mantel from your dealer (see
Accessories, page 30).
Minimum
From
Sides Of
Fireplace
Figure 6 - Mounting Clearances As
Viewed From Front of Fireplace Shown
Top Of
Mantel Can
Be Flush
With Wall
Left
Side
Left
Side
6"
FLOOR
IMPORTANT:
CEILING
Only use optional
36"
Minimum
Built-In the Wall
CEILING
36"
Minimum
Right
Side
Right
Side
0" Minimum
To Top
Surface Of
Carpeting,
Tile Or Other
Combustible
Material
0" Minimum
To Top
Surface Of
Carpeting,
Tile Or Other
Combustible
Material
Note:
When installing fireplace directly on carpeting, tile or other combustible material, other
than wood flooring, the fireplace shall be installed
on a metal or wood panel extending the full width
and depth of the fireplace.
CAUTION: If you install the
fireplace in a home garage
• fireplace pilot and burner must
be at least 18 inches above floor.
• locate fireplace where moving
vehicle will not hit it.
For convenience and efficiency, install fireplace
• where there is easy access for operation, inspection, and service.
• in coldest part of room.
An optional blower kit is available from your dealer
(see Accessories, page 30). If planning to use
blower, locate fireplace near an electrical outlet.
BUILT-IN FIREPLACE
INSTALLATION
Built-in installation of this fireplace involves installing fireplace into a framed-in enclosure. This
makes the front of fireplace flush with wall. An
optional trim kit accessory is available (see Ac-
cessories, page 30). Trim will extend past sides of
fireplace approximately 1/2 inch. This will cover
the rough edges of the wall opening. If installing
a built-in mantel above the fireplace you must follow the clearances shown in Figure 11, page 12.
Follow the instructions below to install the fireplace in this manner.
Actual Framing
Height 26" 26 7/8"
Front Width 26 3/4" 26 7/8"
Depth 9 1/2" 10 1/2"
Bottom 3/4" 3/4"
1. Frame in rough opening. Use dimensions
shown in Figure 8, page 11, for the rough
opening.
If installing in a corner, use dimensions shown
in Figure 9, page 11, for the rough opening.
The height is 26 7/8" which is the same as the
wall opening above.
Figure 7 - Mounting Clearances As
Viewed From Front of Fireplace Shown
with Optional Mantel
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INSTALLATION
Continued
WARNING: If pre-wiring, do
not connect wiring to any electrical source at this time.
Install fireplace electrical outlet
and connect wiring to outlet before connecting to electrical
source. The fireplace electrical
outlet is included with the
GA3450T blower accessory.
Only use the fireplace electrical
outlet supplied with the
GA3450T blower accessory.
2. If installing GA3450T blower accessory, do
so at this time. See Installing Blower Acces-
sory GA3450T, page 13.
Note:
If not installing blower accessory, you
may wish to run electrical wiring to your fireplace for future blower installation (see Ac-
cessories, page 30) Use only approved threewire electrical wiring.
Note:
A qualified installer should make all
electrical connections.
3. Install gas piping to fireplace location. This
installation includes an approved flexible gas
line (if allowed by local codes) after the equipment shutoff valve. The flexible gas line must
be the last item installed on the gas piping.
4. If you have not assembled firebox, follow instructions on page 4.
5. Carefully set fireplace in front of rough opening with back of fireplace inside wall opening.
6. Attach flexible gas line to fireplace gas regulator. See Connecting to Gas Supply, page 16.
7. Bend four nailing flanges on outer casing with
pliers (see Figure 10).
8. Attach fireplace to wall studs using nails or
wood screws through holes in nailing flange.
9. Check all gas connections for leaks. See
Checking Gas Connections, page 18.
10. If using optional trim kit, install the trim after
final finishing and/or painting of wall. See instructions included with trim accessory for attaching trim.
IMPORTANT:
bustible materials
When finishing your firebox, com-
WARNING: Do not allow any
combustible materials to overlap the firebox front facing.
IMPORTANT:
brick, tile, etc. may overlap the front facing, but
should never cover any necessary openings like
louvered slots.
Noncombustible materials such as
WARNING: Do not allow noncombustible materials to cover
any necessary openings like louvered slots.
1
10
/
2"
7
26
/
8"
3/4" Off
7
26
/
8"
Figure 8 - Rough Opening for Installing
in Wall
5
36
/
8
"
7
/
8
"
26
3
/
4
"
51
Figure 9 - Rough Opening for Installing
in Corner
Nails or
Wood
Screws
Figure 10 - Attaching Fireplace to Wall
Studs
The Floor
Minimum
7
/
8
"
25
Nailing
Flanges
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INSTALLATION
13"
16"
19"
21"
2 1/2"
6"
8"
10"
Note:
All vertical
measurements
are from top of
fireplace
opening to
bottom of
mantel shelf. All
measurements
are in inches.
Continued
WARNING: Never modify or
cover the louvered slots on the
front of the firebox.
WARNING: Use only noncombustible mortar or adhesives when overlapping the front
facing with noncombustible facing material.
Mantel Clearances for Built-In
Installation
If placing mantel above built-in fireplace, you
must meet minimum clearance between mantel
shelf and top of fireplace opening.
NOTICE: Surface temperatures
of adjacent walls and mantels
become hot during operation.
Walls and mantels above the firebox 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.
4. Assemble trim kit. See Assembling Perimeter
Trim, page 13.
5. Firmly snap trim kit on shoulder screws.
Shoulder screws are located on fireplace cabinet (see Figure 12).
6. Align trim kit for flush fit around opening.
7. Use two 3" wood screws provided and attach
fireplace base to wooden base (see Figure 12).
8. Remove trim kit and mantel. Be careful not
to damage wall or mantel.
9. Place wood base next to wall at installation
location.
Mantel Shelf
Side of
Firebox
NOTICE: If your installation does
not meet the minimum clearances shown in Figure 11, you
must do one of the following:
• raise the mantel to an accept-
• remove the mantel
OPTIONAL MANTEL INSTALLATION
Note:
tel for assembly instructions. Refer to instructions
below for system installation. Refer to instructions
on page 5 for firebox assembly. Blower accessory
should be installed if it is being used (see Acces-
sories, page 30).
1. Unscrew four brass screws that attach top lou-
2. Place fireplace on wood base.
3. Place mantel around fireplace/base assembly.
12
able height
Refer to instructions provided with the man-
ver to fireplace. Remove louver from fireplace
and set aside.
www.desatech.com 113111-01B
Figure 11 - Minimum Mantel Clearances
Hole for 3" wood
screw for attaching
fireplace to mantel
Hole for 3" wood
screw for attaching
fireplace to wooden base
Figure 12 - Attaching Trim to Fireplace
for Built-In Installation
Shoulder
Screw
Assembled
Trim
INSTALLATION
Continued
10. Attach wood base to floor with two 1 3/4" black
screws provided (see Figure 13). If the floor
is concrete use anchor method (see Attaching
Wood Base to Solid Floor, page 16).
11. Install gas line. See Connecting To Gas Sup-
ply, page 16.
12. Check for leaks. See Checking Gas Connec-
tions, page 18.
13. Place mantel around fireplace. Be careful not
to damage wall or mantel.
14. Place trim kit on the shoulder screws located
on the side and top of the fireplace. Firmly
snap the trim over the shoulder screws on fireplace (see Figure 12, page 12).
15. Adjust assembly to remove any gaps. Attach
remaining two 3" wood screws from hardware
pack through openings inside of fireplace sides
into the mantel. The openings are located at
top behind the area for the black louvers (see
Figure 13).
16. Reinstall top black louvers.
1 3/4" Screw
Slot
Slot
Top Trim
Mitered Edge
Side
Trim
Set Screws
Adjusting
Plate
Shim
Figure 14 - Assembling Perimeter Trim
INSTALLING BLOWER ACCESSORY
GA3450T
Removing Upper Louver Assembly
To install the blower accessory, you must first remove the upper louver assembly.
1. Lift screen off heater.
2. Remove 4 screws from louver assembly (see
Figure 15). Save these screws.
3. Pull louver assembly straight out from the
cabinet. Be careful not to scratch the paint.
Set louver assembly and screws aside.
Blower Bracket
Mounting Holes
Wood
Base
Figure 13 - Attaching Wood Base to
Floor
Assembling Perimeter Trim (Trim
Shipped with Mantel)
1. Remove packaging from three remaining
pieces of trim.
2. Locate two adjusting plates with set screws,
and two shims in the hardware packet.
3. Align shim under adjusting plate as shown in
Figure 14.
4. Slide one end of adjusting plate/shim in slot
on mitered edge of top trim (see Figure 14).
5. Slide other end of adjusting plate/shim in slot
on mitered edge of side trim (see Figure 14).
6. While firmly holding edges of trim together,
tighten both set screws on the adjusting plate
with slotted screwdriver.
7. Repeat steps 1 through 6 for other corner.
8. Set trim assembly aside for later installation.
113111-01B 13
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Figure 15 - Removing Upper Louver
Removing Valve Cover Shield
1. Open bottom louver assembly by swinging the
assembly down (see Figure 16, page 14).
2. Using short Phillips screwdriver, remove the
screw under the center of the branch support. Rotate valve cover shield clockwise
and slide out.
IMPORTANT:
on the left side of valve cover shield. Slide
the valve cover shield off of the shoulder screw
(see Figure 16, page 14).
Note:
screwdriver, the screen, log set, and branch
support must be removed so a longer screwdriver may be used. See Connecting Equip-
ment Shutoff Valve to Heater Control, page
17, steps 1 and 2.
Black
Screws
Assembly
Do not remove shoulder screw
If you do not have a short Phillips
Upper Louver
Assembly
INSTALLATION
Continued
Branch Support
Shoulder
Screw
Valve
Remove
Screw
Cover
Shield
2
1
Snap Bushings
Figure 16 - Removing Valve Cover Shield
Installing Blower Assembly
CAUTION: Label all wires
prior to disconnection when servicing controls. Wiring errors
can cause improper and dangerous operation.
CAUTION: Verify proper operation after servicing.
Note:
If you are using a mantel with your heater,
use the following instructions. If your heater is
built-in, see For Built-In Installation on page 15.
1. Install snap bushings found in hardware kit
into both holes in rear of valve cover shield.
2. Make sure the wire harness is firmly con-
nected to the terminals on the blower bracket
assembly.
3. Note the wire locations on back of AUTO/
OFF/ON switch. The terminals on back of
switch are numbered 1, 2, and 3. Carefully
remove red wire from terminal 1 and blue wire
from terminal 3. Black wire can remain on
middle terminal 2 (see Figure 17).
4. Carefully disconnect green and white wires
at their insulated connectors.
5. In top of the heater cabinet, locate the four
mounting holes on the outer casing. Align
these four holes with those on the blower
bracket assembly. Attach blower bracket as-
Bottom Louver
Assembly
sembly to the outer casing with 4 #10 screws
provided (see Figure 17).
6. Route the wire harness through the hole in left
side of baffle. Pull wire harness through lower
opening above where the valve shield was removed. (see Figure 17).
7. Insert the 4 wire harness into one of the round
holes in the rear of the valve cover shield and
through the rectangular hole in the front of
shield (see Figure 17).
8. Reconnect red wire to switch position 3. Reconnect blue wire to switch position 1. Reconnect green and white wires.
9. Install the switch plate on the valve cover
shield with 2 #10 screws provided (see Figure 17). Reinstall the valve cover shield. Route
power cord out of the cabinet by inserting it
through the bushing on the outer casing (see
Figure 17). Plug fan kit into 120-Volt
grounded power supply and test operation.
Note:
When switch is in the AUTO position,
the fan will start after the heater has run for a
few moments. The fan will continue to run
for several moments after the heater has been
turned off. When switch is in the ON position, the fan will run until turned to OFF. Reinstall upper louver assembly and hood if previously removed, (see Figure 15, page 13).
Close lower louver door.
Blower Bracket
Assembly
Screw
Switch
3
2
1
Switch
Plate
Blue
Valve Cover
Shield
Red
Wire
Harness
Power
Cord
Box Cover
Wiring Routing
Hole in Baffle
Baffle
Wire
Harness
Figure 17 - Installing Blower Bracket
Assembly
14
www.desatech.com 113111-01B
INSTALLATION
Red
Red
Fan Switch
(Auto/Off/On)
Blue
Blue
Thermostat
Switch
(N.O.)
Green
White
Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
1
2
3
Auto
Continued
Valve Cover
Shield
Switch
Plate
Figure 18 - Installing Switch Plate to
For Built-In Installation
WARNING: A licensed electrician must connect the wiring
harness to electrical supply following all local codes. Electrician must provide a clamp on
the box cover to secure the wiring. Wiring should be routed
through the bushing in the hole
on the outer casing of heater.
Follow instructions Removing Valve Cover Shield
(page 13), then
1. Install a snap bushing found in hardware kit
into one of the holes found on rear of valve
cover shield. The other hole is for a strain re-
Screw
Valve Cover Shield
lief clamp (not supplied) to secure incoming
electrical supply.
2. Follow steps 2 through 6 in Installing Blower
Assembly, page 13. Also remove black wire
from middle switch terminal 2.
3. Remove black plastic strain relief and power
cord from switch plate. The power cord supplied
will not be used in built-in installations. Pop in
the plastic snap bushing found in hardware kit
into the hole left by supply cord/strain relief.
4. A licensed electrician must follow the wiring
diagram to connect incoming electrical supply to fan kit wiring harness (see Figure 19).
5. Plug power cord to the outlet receptacle (not
provided) as shown in Figure 18. Wind the
extra power cord and tie it up with the plastic
wire strap (see Figure 20). Set the power cord
bundle between the burner bracket and outer
casing, away from the burner.
6. Reinstall valve cover shield.
7. Test to make sure the blower is working
properly.
8. Reinstall upper louver assembly and hood if
previously removed, (see Figure 15, page 13).
Close lower louver door.
Blower Bracket
Assembly
Wire Harness
Screw
Switch
Power
Cord
Outlet
Receptacle
Switch
Plate
Blue
3
2
1
Red
Plastic Wire
Figure 19 - Wiring Diagram For Blower
Accessory Built-In Installation
113111-01B 15
Strap
Valve
Cover
Shield
Clamp Connector
(not included)
Figure 20 - Installing Blower Bracket
www.desatech.com
Box Cover
Assembly
Wire
Harness
INSTALLATION
Continued
Extension Cord
Use extension cord if needed. The cord must have a
three-prong, grounding plug and a three-hole receptacle. Make sure cord is in good shape. It must be
heavy enough to carry the current needed. An undersized cord will cause a drop in line voltage. This will
result in loss of power and overheating. Use a No.
16 AWG cord for lengths less than 50 feet.
ATTACHING WOOD BASE TO
SOLID FLOOR
For attaching base to solid floors (concrete or
masonry)
Note:
Floor anchors and mounting screws are in
hardware package. The hardware package is provided with fireplace.
1. Drill holes at marked locations using 5/16"
drill bit. For solid floors (concrete or masonry), drill at least 1" deep.
2. Fold floor anchor as shown in Figure 21.
3. Insert floor anchor (wings first) into hole. Tap
anchor flush to floor.
4. Insert mounting screws through base and into
floor anchors.
5. Tighten screws until base is firmly fastened
to floor.
Figure 21 - Folding Anchor
CONNECTING TO GAS SUPPLY
WARNING: This appliance requires a 45° male flare fitting 5/8"18 UNF (Unified National Fine
Thread) inlet connection and the
flexible gas line provided.
WARNING: A qualified service person must connect fireplace to gas supply. Follow all
local codes.
CAUTION: Never connect propane/LP fireplace directly to the
propane/LP supply. This fireplace
requires an external regulator (not
supplied). Install the external regulator between the fireplace and
propane/LP supply.
WARNING: Never connect
natural gas fireplace to private
(non-utility) gas wells. This gas is
commonly known as wellhead gas.
For propane/LP units, 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, fireplace regulator damage could occur. Install external regulator with the vent pointing down
as shown in Figure 22. Pointing the vent down
protects it from freezing rain or sleet.
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" or greater diameter
to allow proper gas volume to
fireplace. If pipe is too small,
undue loss of volume will occur.
Propane/LP
Supply Tank
Figure 22- External Regulator with Vent
Pointing Down
External
Regulator
Vent
Pointing
Down
16
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INSTALLATION
Continued
Installation must include a 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 fireplace (see Figure 23).
IMPORTANT:
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 fireplaces.
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 fireplace valves.
sealant that is resistant to liquid
petroleum (LP) gas.
3" Minimum
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 30.
Install equipment shutoff valve in
WARNING: Use pipe joint
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
PROPANE/LP
From External
Regulator (11" W.C.
to 14" W.C. Pressure)
NATURAL
From Gas Meter
(5" W.C. to
10.5" W.C.
Pressure)
Pipe Cap Tee
Nipple Joint
Sediment Trap
Figure 23 - Gas Connection
of screen. Discard screws. Lift fireplace screen
up and pull out to remove.
2. Remove screws that attach branch support to
fireplace (see Figure 24). Carefully lift up
branch support and remove from fireplace (see
Figure 24).
3. Route flexible gas line included from fireplace
control to equipment shutoff valve through
side or rear access holes in outer casing.
NOTICE: Most building codes do
not permit concealed gas connections. A flexible gas line is
provided to allow accessibility
from the fireplace (see Figure 24).
The flexible gas supply line connection to the equipment shutoff
valve should be accessible.
CAUTION: Avoid damage to
regulator. Hold gas regulator
with wrench when connecting it
to gas piping and/or fittings.
4.
Apply pipe joint sealant lightly to male threads
of gas connector attached to flexible gas line/
equipment shutoff valve (see Figure 25, page 18).
5. Check all gas connections for leaks. See
Checking Gas Connections, page 18.
6. Replace branch support back into fireplace.
Feed flexible gas line into fireplace base area
while replacing branch support. Make sure the
entire flexible gas line is in fireplace base area.
Reattach branch support to fireplace with
screws removed in step 2.
Branch
Support
Screen
Shipping
Screw
Shoulder
Screw
CONNECTING EQUIPMENT SHUTOFF
VALVE TO HEATER CONTROL
Installation Items Needed
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not provided)
1. To remove fireplace screen, remove two
screws that hold fireplace screen in place for
shipping. These screws are located near top
113111-01B 17
www.desatech.com
Screen
Figure 24 - Removing Log Base
Assembly From Fireplace
Flexible
Gas Line
INSTALLATION
T
O
Continued
To Fireplace
Gas Regulator
Flexible Gas Line
from Fireplace Gas
Regulator Provided
with Fireplace
Figure 25 - Attaching Flexible Gas Line
to Equipment Shutoff Valve
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping and connections, internal
and external to unit, for leaks
after installing or servicing. Correct all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak detection fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure external
regulator has been installed between propane/LP supply and fireplace. See guidelines under
necting to Gas Supply
Pressure Testing Gas Supply Piping
System
Test Pressures In Excess Of 1/2 PSIG (3.5 kPa)
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment
shutoff valve from gas supply piping. Pressures in excess of 1/2 psig will damage fireplace 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 lo-
Equipment Shutoff
Valve Provided by
Installer
PROPANE/LP
To External Regulator
NATURAL
To Gas Supply
Con-
, page 16.
cated on or near gas meter for natural gas, or
using compressed air.
4. Check all joints of gas supply piping system.
Apply a noncorrosive leak detection fluid to
gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve
to gas supply. Check reconnected fittings for
leaks.
Test Pressures Equal To or Less Than 1/2 PSIG
(3.5 kPa)
1. Close equipment shutoff valve (see Figure 26).
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 for natural or
propane/LP supply to equipment shutoff valve
(see Figures 27 and 28, page 19). Apply a noncorrosive leak detection fluid to gas joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Pressure Testing Fireplace Gas
Connections
1. Open equipment shutoff valve (see Figure 26).
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 fireplace is in the
OFF position.
4. Check all joints from equipment shutoff valve
to thermostat gas valve (see Figures 27 and 28,
page 19). Apply a noncorrosive leak detection
fluid to gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light fireplace (see Operating Fireplace,
pages 19 and 21). Check all other internal
joints for leaks.
7. Turn off fireplace (see To Turn Off Gas to
Appliance, page 20).
8. Replace front panel.
Equipment
Shutoff
Valve
O
Open
POSI
P
Closed
Figure 26 - Equipment Shutoff Valve
18
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INSTALLATION
Continued
Equipment
Shutoff Valve
Propane/LP
Supply Tank
Figure 27 - Checking Gas Joints for
Propane/LP Gas (Shown with Optional
Mantel)
Equipment
Shutoff Valve
Gas Meter
Figure 28 - Checking Gas Joints for
Natural Gas (Shown with Optional Mantel)
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 neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call
the fire 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 qualified service technician or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a qualified 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: You must operate this fireplace with the fireplace screen in place. Make sure
fireplace screen is installed before running fireplace.
OPERATING FIREPLACE
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly,
a fire 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 floor because some gas is heavier than
air and will settle on the floor.
113111-01B 19
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NOTICE: During initial operation
of new fireplace, burning logs
will give off a paper-burning
smell. Orange flame will also be
present. Open window to vent
smell. Operate fireplace on HI
position to burn off odor. This
will only last a few hours.
1. STOP! Read the safety information starting in column 1.
2. Make sure equipment shutoff valve is fully
open.
3. Turn control knob clockwise to the
OFF position.
4. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the floor.
If you smell gas, STOP! Follow “B” in the
safety information starting in column 1. If
you don’t smell gas, go to the next step.
OPERATING FIREPLACE
Continued
5. Turn control knob counterclockwise
to the PILOT position. Press in control knob
for five (5) seconds (see Figure 29).
Note:
You may be running this fireplace
for the first 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.
• If control knob does not pop up when re-
leased, contact a qualified service person
or gas supplier for repairs.
6. With control knob pressed in, push down
and release ignitor button. This will light
pilot. The pilot is attached to the front of
burner. If needed, keep pressing ignitor button until pilot lights.
Note:
If pilot does not stay lit, refer to
Troubleshooting, pages 23 through 26. Also
contact a qualified service person or gas
supplier for repairs. Until repairs are made,
light pilot with match. To light pilot with
match, see Manual Lighting Procedure.
7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds,
release control knob.
Note:
If pilot goes out, repeat steps 3
through 7. This fireplace has a safety interlock system. Wait one (1) minute before
lighting pilot again.
8. Turn control knob counterclockwise
to desired heating level. The main
burner should light. Set control knob to any
heat level between HI and LO.
CAUTION: Do not try to adjust heating levels by using the
equipment shutoff valve.
Ignitor Button
Figure 29 - Control Knob In The OFF
20
Control Knob
Position
www.desatech.com 113111-01B
Ignitor Electrode
Pilot Burner
Thermocouple
Figure 30 - Pilot (Propane/LP Shown)
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Fireplace
1. Turn control knob clockwise to the
OFF position.
2. Turn off all electric power to the appliance
if service is to be performed.
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise to the PILOT position.
THERMOSTAT
CONTROL OPERATION
The thermostatic control used on this fireplace differs from standard thermostats. Standard thermostats simply turn on and off the burner. The thermostat used on this fireplace senses the room temperature. The thermostat adjusts the amount of
gas flow to the burner. This increases or decreases
the burner flame height. At times the room may
exceed the set temperature. If so, the burner will
shut off. The burner will cycle back on when room
temperature drops below the set temperature.
The control knob can be set to any heat level
between HI and LO.
Note:
The thermostat sensing bulb measures
the temperature of air near the fireplace cabinet. This may not always agree with room temperature (depending on housing construction,
installation location, room size, open air temperatures, etc.). Frequent use of your fireplace
will let you determine your own comfort levels.
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under Lighting In-
structions, starting on page 19, column 1.
2. With control knob pressed in, strike match.
Hold match to pilot until pilot lights.
3. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob. Now follow step 8
under Lighting Instructions, column 1
OPERATING FIREPLACE
Continued
OPERATING
BLOWER
This blower has three settings: ON, OFF, and
AUTO. In the ON position, the blower will operate constantly. In the OFF position, the
blower will not operate. In the AUTO position,
the blower will start when the thermostat senses
a sufficient increase in firebox temperature.
Note:
Your fireplace and thermostat blower
will not turn on and off at the same time. The
fireplace may run for several minutes before
the blower turns on. After the heater modulates
to the pilot position, the blower will continue to
run. The blower will shut off after the firebox
temperature decreases.
Note:
It is safe to operate fireplace with blower
turned off. However, the blower helps distribute heated air from the fireplace.
O
N
OFF
Auto/Off/On
Switch
Figure 31 - Auto/Off/On Switch
INSPECTING BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 32 shows a correct pilot flame pattern. Figure 33 shows an incorrect pilot flame pattern. The
incorrect pilot flame is not properly heating the
thermocouple. This will cause the thermocouple
to cool. When the thermocouple cools, the fireplace will shut down.
If pilot flame pattern is incorrect, as shown in Figure 33
• turn fireplace off (see To Turn Off Gas to Ap-
pliance, page 20)
• see Troubleshooting, pages 23 through 26
Note:
The pilot flame on natural gas units will
have a slight curve, but flame should be blue and
have no yellow or orange color.
Pilot Burner
Thermocouple
Figure 32 - Correct Pilot Flame Pattern
(Propane/LP Shown)
Pilot Burner
Thermocouple
Figure 33 - Incorrect Pilot Flame Pattern
(Propane/LP Shown)
BURNER FLAME PATTERN
Figure 34 shows a correct burner flame pattern.
Figure 35 shows an incorrect burner flame pattern. The incorrect burner flame pattern shows
sporadic, irregular flame tipping. The flame should
not be dark or have an orange/reddish tinge.
Note:
When using the fireplace the first time, the
flame will be orange for approximately one hour
until the log cures.
If burner flame pattern is incorrect, as shown in
Figure 35
• turn fireplace off (see To Turn Off Gas to Ap-
pliance, page 20)
• see Troubleshooting, pages 23 through 26
Figure 34 - Correct Burner Flame Pattern
Figure 35 - Incorrect Burner Flame
Pattern
113111-01B 21
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CLEANING AND
MAINTENANCE
WARNING: Turn off fireplace
and let cool before cleaning.
CAUTION: You must keep
control areas, burner, and circulating air passageways of fireplace clean. Inspect these areas
of fireplace before each use.
Have fireplace inspected yearly
by a qualified 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.
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 flame indicates dust and dirt in the pilot assembly. There is a small pilot air inlet hole about
two inches from where the pilot flame comes out
of the pilot assembly (see Figure 37). 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.
Ports/Slots
Injector
Holder
Burner Tube
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 flame. 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 qualified 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
Figure 36).
3. Blow air through the ports/slots and holes in
the burner.
22
www.desatech.com 113111-01B
Primary Air Inlet Holes
Figure 36 - Injector Holder On Outlet
Burner Tube
Pilot Air Inlet Hole
Pilot Assembly
Figure 37 - Pilot Inlet Air Hole
(Propane/LP Shown)
CABINET
Air Passageways
• Use a vacuum cleaner or pressurized air to clean.
Exterior
• Use a soft cloth dampened with a mild soap and
water mixture. Wipe the cabinet to remove dust.
TROUBLESHOOTING
Note:
All troubleshooting items are listed in order of operation.
WARNING: Turn off heater and let cool before servicing. Only a
qualified 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.
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. Ignitor cable pinched or wet
2. Ignitor electrode not connected to ignitor cable
3. Broken ignitor cable
4. Bad piezo ignitor
5. Ignitor electrode broken
6. Ignitor electrode positioned
wrong
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. Free ignitor cable if pinched
by any metal or tubing. Keep
ignitor cable dry
2. Reconnect ignitor cable
3. Replace ignitor cable
4. Replace piezo ignitor
5. Replace pilot assembly
6. 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 Clean-
ing and Maintenance, page
22) or replace ODS/pilot assembly
7. Replace gas regulator
113111-01B 23
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OBSERVED PROBLEM
ODS/pilot lights but flame goes
out when control knob is released
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Control knob not fully
pressed in
2. Control knob not pressed in
long enough
3. Safety interlock system has
been triggered
4. Equipment shutoff valve not
fully open
5. Thermocouple connection
loose at control valve
6. Pilot flame not touching thermocouple, which allows thermocouple to cool, causing 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
7. Thermocouple damaged
8. Control valve damaged
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds
3. Wait one minute for safety interlock system to reset. Repeat
ignition operation
4. Fully open equipment shutoff
valve
5. Hand tighten until snug, then
tighten 1/4 turn more
6. A) Contact local propane/LP
or natural gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 22) or replace ODS/pilot assembly
7. Replace pilot assembly
8. Replace control valve
Burner does not light after ODS/
pilot is lit
Delayed ignition of burner
Burner backfiring during combustion
Yellow flame during burner
combustion
24
1. Burner orifice is clogged
2. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Burner orifice is clogged or
damaged
2. Burner damaged
3. Low inlet gas pressure
4. Gas regulator defective
1. Not enough air
2. Gas regulator defective
www.desatech.com 113111-01B
1. Clean burner (see Cleaning
and Maintenance, page 22) or
replace burner orifice
2. Contact local propane/LP or
natural gas company
1. Contact local propane/LP or
natural gas company
2. Clean burner (see Cleaning
and Maintenance, page 22) or
replace burner orifice
1. Clean burner (see Cleaning
and Maintenance, page 22) or
replace burner orifice
2. Replace burner pressure
3. Contact local propane/LP or
natural gas company
4. Replace gas regulator
1. Check burner for dirt and debris. If found, clean burner
(see Cleaning and Mainte-
nance, page 22)
2. Replace gas regulator
OBSERVED PROBLEM
Slight smoke or odor during initial operation
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Residues from manufacturing
processes
REMEDY
1. Problem will stop after a few
hours of operation
Fireplace produces a whistling
noise when burner is lit
White powder residue forming
within burner box or on adjacent walls or furniture
Fireplace produces a clicking/
ticking noise just after burner is
lit or shut off
1. Turning control knob to HI position when burner is cold
2. Air in gas line
3. Air passageways on fireplace
blocked
4. Dirty or partially clogged
burner orifice
1. When heated, vapors from furniture polish, wax, carpet
cleaners, etc. may turn into
white powder residue
1. Metal expanding while heating
or contracting while cooling
1. Turn control knob to LO position and let warm up for a
minute
2. Operate burner until air is removed from line. Have gas line
checked by local propane/LP
gas company
3. Observe minimum installation
clearances (see pages 9
through 12)
4. Clean burner (see Cleaning
and Maintenance, page 22) or
replace burner orifice
1. Turn heater off when using
furniture polish, wax, carpet
cleaners, or similar products
1. This is common with most fireplaces. If noise is excessive,
contact qualified service person
113111-01B 25
www.desatech.com
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 fire department.
IMPORTANT:
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.
Operating fireplace where impurities in air exist may create odors. Cleaning supplies,
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
Moisture/condensation noticed
on windows
POSSIBLE CAUSE
1. Fireplace burning vapors from
paint, hair spray, glues, etc.
(See
IMPORTANT
above)
2. Low fuel supply (propane/LP)
3. Gas leak. See Warning
statement above
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. See Warning
statement above
2. Control valve defective
1. Foreign matter between control valve and burner
2. Gas leak. See Warning
statement above
1. Not enough combustion/ventilation air
statement
REMEDY
1. Ventilate room. Stop using
odor causing products while
fireplace is running
2. Refill supply tank
3. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 18)
1. Open window and/or door for
ventilation
2. Contact local propane/LP or
natural gas company
3. Clean ODS/pilot (see Cleaning
and Maintenance, page 22)
1. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 18)
2. Replace control valve
1. Take apart gas tubing and remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 18)
1. Refer to Air for Combustion
and Ventilation requirements
(page 6)
26
www.desatech.com 113111-01B
SPECIFICATIONS
VMH26TPC VMH26TNC
Btu (Variable) 14,000/26,000 14,000/26,000
Type Gas Propane/LP Only Natural Only
Ignition Piezo Piezo
Pressure Regulator Setting 8" W.C. 3" W.C.
Inlet Gas Pressure (in. of water) *
Maximum 14" 10.5"
Minimum 11" 5"
Dimensions, Inches (H x W x D)
Fireplace (including hood and screws) 25 7/8 x 26 13/16 x 9 3/8 25 7/8 x 26 13/16 x 9 3/8
Carton 32 5/8 x 27 3/16 x 11 5/8 32 5/8 x 27 3/16 x 11 5/8
Weight, pounds
Fireplace 44.5 lbs. 44.5 lbs.
Shipping 48 lbs. 48 lbs.
* For purposes of input adjustment
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• fireplace will not produce specified heat
• propane/LP gas supply may be low (propane/
LP only)
You may feel your gas pressure is too low. If so, contact your local propane/LP or natural gas supplier.
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.
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 for referral information.
When calling DESA Heating Products, have ready
• your name
• your address
• model and serial numbers of your fireplace
• how fireplace 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, have ready
• model number of your fireplace
• the replacement part number
113111-01B 27
www.desatech.com
ILLUSTRATED PARTS BREAKDOWN
MODELS VMH26TPC (Shown) AND VMH26TNC
17
3
6
9
30
7
4
4
20
34
10
35
39
8
11
13
37
7
40
33
23
14
25
14
29
24
12-1
40
32
19
1
40
3
2
27
25
28
28
www.desatech.com 113111-01B
16
12
24
5
15
39
43
44
6
26
18
9
42
21
38
36
22
41
31
PARTS LIST
This list contains replaceable parts used in your fireplace. When ordering parts, follow the instructions
listed under Replacement Parts on page 27 of this manual.
KEY PART NUMBER
NO. VMH26TPC VMH26TNC DESCRIPTION QTY.
1 102633-02 102633-02 Outer Casing Top 1
2 102624-02 102624-02 Outer Casing 1
3 099230-02 099230-02 Shoulder Screw 14
4 098304-01 098304-01 Screw, #10 x 3/8" 15
5 109824-05 109824-05 Burner 1
6 103209-05 103209-05 Louvered Door 2
7 102635-02 102635-02 Left and Right Side Front 2
8 101629-02 101629-02 Bushing 1
9 M10908-75 M10908-75 Hex Washer Head Tapping Screw 1
10 104281-02BR 104281-02BR Firebox Hood 1
11 102638-01 102638-01 Firebox Top 1
12 104286-01 104285-01 ODS/Pilot Assembly 1
13 ** ** Firebox Wrapper 1
14 099211-01 099211-01 Control Bracket Screw 2
15 103963-01 103963-01 Inlet Tube 1
16 102834-01 102834-01 Burner Tube 1
17 098304-02 098304-02 Black Screw, #6 x 3/8 4
18 098303-02 098303-02 Regulator Screw 2
19 ** ** Outer Shell Base 1
20 102649-02 102649-02 Branch Support 1
21 099415-09 099415-10 Gas Regulator 1
22 102875-01 102875-01 Regulator Bracket 1
23 101381-01 101381-01 Valve Cover and Piezo 1
24 099387-11 099387-11 Pilot Tube 1
25 098271-06 098271-06 Ignitor Cable 1
26 107186-01 107186-02 Injector 1
27 101006-02 101006-02 Pilot Bracket 1
28 098249-01 098249-01 Nut, M5 2
29 098522-26 098522-23 Gas Valve 1
30 102639-01 102639-01 Baffle 1
31 101628-01 101628-01 Flexible Connector 1
32 102869-01 102869-01 Control Bracket 1
33 102731-01 102731-01 Control Shield 1
34 103295-05BR 103295-05BR Screen Assembly 1
35 107153-01 107153-01 Log Set Kit 1
36 104313-01 104313-01 Right Hinge 1
37 104313-02 104313-02 Left Hinge 1
38 M10908-2 M10908-2 Hinge Screws 4
39 103734-01 103734-01 Burner Support 2
40 M11084-26 M11084-26 Hex Head Screw, #10 x 3/8" 28
41 097809-03 097809-03 3/8 NPT x 3/8" Flare Brass Fitting 1
42 101629-01 101629-01 Bushing 1
___
43
101054-01 101054-01 Lighting Instructions Plate 1
100563-01 100563-01 Warning Plate 1
103470-01 103470-01 Hardware Package 1
** Part not available for field replacement.
113111-01B 29
107634-02 NG Conversion Plate 1
PARTS AVAILABLE — NOT SHOWN
www.desatech.com
ACCESSORIES
NOTICE: All accessories may
not be available for all fireplace
models.
Purchase these fireplace accessories from your
local dealer. If they cannot supply these accessories call DESA Heating Products’ Sales Department at 1-866-672-6040 for referral 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.
EXTRUDED LOUVER KIT
(Not Shown)
GA9092 - Polished Brass
GAP9092 - Platinum
For all models. Optional extruded louver. Kit contains 2 louvers.
THERMOSTATICALLY CONTROLLED BLOWER KIT
GA3450TA
For all models. Provides better heat distribution.
Makes fireplace more efficient. Automatically
turns off and on as needed.
PERIMETER TRIM KIT - GA6094
For all models. Optional three-sided perimeter
trim kit for custom and recessed installations
(when unit is on the floor). Provides a finished
appearance by covering rough edges of wall opening. Included with all mantels.
PERIMETER TRIM KIT - GA6095
GA6094 - Polished Brass
GAB6094 - Black
GAP6094 - Platinum
For all models. Optional three-sided perimeter
trim kit for custom and recessed installations
(when unit is on the floor). Provides a finished
appearance by covering rough edges of wall opening. Black trim included with all mantels.
30
www.desatech.com 113111-01B
CABINET MANTEL WITH FULL HEARTH
BASE AND ROUNDED LEG STYLING
Unfinished - GMC61U
Oak Finished - GMC60F
(Appearance May Differ by Model)
For all models. A mantel and hearth base offers
compact styling and completes the fireplace look.
Available in a oak stain finish, or an unfinished
birch, ready to stain or paint. Complete assembly
instructions included. Three-sided perimeter trim
kit included.
ACCESSORIES
Continued
CORNER MANTEL WITH FULL
HEARTH BASE
Unfinished - GMC63U
Finished - GMC64F
For all models. Space-saving mantel and hearth
base corner design features clean, classic lines.
Available in a stained oak finish, white lacquer
finish, or an unfinished birch, ready to stain or
paint. Complete assembly instructions included.
Three-sided perimeter trim kit included.
CLEANING KIT - GCK
(Not Shown)
Your vent-free gas appliance requires regular
cleaning and maintenance to prevent performance
problems. This kit gives you the tools and instructions to make it easy to clean all critical areas of
your appliance.
INFORMATION VIDEO - 108917-01
A care and maintenance video is available by calling 1-866-672-6040. You may also email your request to productsupport@desaint.com.
FIRE CRACKLE - CF6-A
(Not Shown)
Creates the sound of a real burning fire.
CABINET MANTEL AND FULL
HEARTH BASE
GMC80F Series - Oak Finished
GMC81U Series - Unfinished Birch
GMC82F Series - Cherry Finished Birch
For all models. Mantel features columns, moldings, fluting and medallion. Three-sided perimeter trim kit included.
Dimensions (WxHxD): 56" x 50" x 24"
113111-01B 31
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WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications 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 COMPACT CLASSIC HEARTH® FIREPLACE
DESA Heating Products warrants this product to be free from defects in materials and components for four (4)
years and five (5) years on stainless steel burners from the date of first 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 fireplace 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 fireplace MUST be installed by a qualified 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 fireplace 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 FOUR
(4) YEARS ON ALL COMPONENTS AND FIVE (5) YEARS ON STAINLESS STEEL BURNERS 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 specific legal rights, and you may also have other rights that vary from state to state.
For information about this warranty write:
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
113111 01
NOT A UPC
113111-01
Rev. B
06/04
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