®
VENT-FREE NATURAL GAS
COMPACT CLASSIC HEARTH® FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
VMH10TNB
10,000 Btu/Hr with
Thermostat
Shown with Optional
Cabinet Mantel/Hearth
Base Accessory
WARNING: Improper instal-
WARNING: If the information in this manual
lation,adjustment,alteration,
is not followed exactly, a fire or explosion
service, or maintenance can
may result causing property damage, per-
sonal injury, or loss of life.
causeinjuryorpropertydam-
age. Refer to this manual for
correct installation and op-
erational procedures. For as-
sistance or additional infor-
mation consult a qualified in-
staller,serviceagency,orthe
gas supplier.
— 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.
• Immediatelycallyourgassupplierfrom
a neighbor’s phone. Follow the gas
supplier’s instructions.
WARNING: This is an
unvented gas-fired heater. It
uses air (oxygen) from the
room in which it is installed.
Provisionsforadequatecom-
bustion and ventilation air
must be provided. Refer to
Air for Combustion and Ven-
tilation section on page 5 of
this manual.
• If you cannot reach your gas supplier,
call the fire department.
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
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
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OWNER’S MANUAL
PRODUCT
UNPACKING
1. Remove log box and fireplace from
carton. IMPORTANT: The fireplace
hood is inside the cardboard protective
end wrap on the left side of fireplace
(as viewed from front). A decal is on
the outside of the cardboard end wrap
stating hood is enclosed (see Figure 2).
IDENTIFICATION
Fireplace
Cabinet
2. Remove hood from cardboard protec-
tive end wrap as shown in Figure 2.
Screen
3. Remove all protective packaging ap-
plied to fireplace for shipment.
4. Make sure your fireplace includes one
hardware packet.
5. Check fireplace for any shipping dam-
age. If fireplace is damaged, promptly
inform dealer where you bought fireplace.
Log
IMPORTANT:
Hood Enclosed
Decal
THIS PACKAGE CONTAINS A
FIREPLACE HOOD. UNWRAP
CARTON AND REMOVE HOOD
BEFORE DISCARDING
PROTECTIVE PACKAGING.
Control Knob
Ignitor Button
Cardboard
Protective
Fireplace
End Wrap
Figure 1 - Vent-Free Natural Gas Compact Fireplace
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 ANS Z223.1, also known as NFPA 54*.
PRODUCT
FEATURES
2
SAFETY PILOT
This fireplace has a pilot with an Oxygen
Depletion Sensing (ODS) safety shutoff sys-
tem. The ODS/pilot is a required feature for
vent-freeroomfireplaces.TheODS/pilotshuts
offthefireplaceifthereisnotenoughfreshair.
*Available from:
1
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
Hood
PIEZO IGNITION SYSTEM
National Fire Protection Association, Inc.
Batterymarch Park
This fireplace has a piezo ignitor. This sys-
tem requires no matches, batteries, or other
sources to light fireplace.
Quincy, MA 02269
Figure 2 - Removing Fireplace Hood
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.
107031
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VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
ASSEMBLY
Shoulder
Screw
Log
WARNING: Always have
branch support and screen in
place before operating fireplace.
Thispreventsexcessivetempera-
tures on fireplace surfaces.
WARNING: Failure to position
thepartsinaccordancewiththese
diagrams or failure to use only
parts specifically approved with
this fireplace may result in prop-
erty damage or personal injury.
Burner
Support
With Log
Locator
Tabs
ASSEMBLING FIREPLACE
Tools Required:
• Phillips screwdriver
• 5/16" hex wrench
• slotted screwdriver
• scissors
Branch
Support
Screen
Installing Log
Figure 3 - Assembling Fireplace
1. Lift screen up and pull out to remove.
2. Cut two plastic straps to remove the log
from the firebox cavity.
4. Gently rotate hood to upright position.
Make sure hood tabs are behind lou-
vers and hood is resting on firebox top
(see Figure 4).
Assembling Hood
1. Locate four black phillips sheet metal
screws from the hardware packet.
3. An optional blower is available. See Ac-
cessories, page 27. Install optional
blower now. Follow installation instruc-
tions provided with blower.
2. Rotate hood as shown in Figure 4.
Make sure hood tabs point toward
fireplace.
5. Align screw holes on hood with screw
holes on firebox top.
4. Remove log packaging material and
discard packaging. Gently place log on
burner support (see Figure 3). The log
should fit flat against top of burner sup-
port and log locator tabs fit into the slots
under the log. Do not allow log to con-
tact flame. If flame contacts log, soot
will be created.
6. Insert screws as shown in Figure 4.
Tighten screws firmly.
3. Insert hood tabs between baffle and
louvers (see Figure 4).
Louver
5. Reattach screen by placing the notches
in the screen frame over the shoulder
screws and pushing down.
Hood Tab
Baffle
Hood
Hood Tabs
Sheet Metal
Screws
Firebox Top
Figure 4 - Assembling Hood
107031
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OWNER’S MANUAL
Confined and Unconfined Space
PROVIDING ADEQUATE
VENTILATION
AIR FOR
The National Fuel Gas Code, ANS Z223.1
defines a confined space as a space whose
COMBUSTION AND
VENTILATION
The following are excerpts from National
Fuel Gas Code. NFPA 54/ANS Z223.1, Sec-
tion5.3, AirforCombustionandVentilation.
volume is less than 50 cubic feet per 1,000
Btu per hour (4.8 m3 per kw) of the aggre-
gate 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
whichtheappliancesareinstalled*,through
openings not furnished with doors, are con-
sidered a part of the unconfined space.
WARNING: This heater shall
notbeinstalledinaconfinedspace
or unusually tight construction
unless provisions are provided
foradequatecombustionandven-
tilation air. Read the following in-
structions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
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 5 through 7 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
This heater shall not be installed in a con-
fined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weather strip and caulk around windows and
doorstokeepthecoldairoutandthewarmair
in. During heating months, home owners
want their homes as airtight as possible.
The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
* Adjoining rooms are communicating only
iftherearedoorlesspassagewaysorventila-
tion grills between them.
Unusually tight construction is de-
fined as construction where:
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 com-
bustion and ventilation.
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6 x 10-11 kg
per pa-sec-m2) or less with open-
ings gasketed or sealed and
Exhaustfans, fireplaces, clothesdryers, and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air for these appliances. This
will insure proper venting of vented fuel-
burning appliances.
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, be-
tween sole plates and floors, be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tions for plumbing, electrical, and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors, page 7.
If your home does not meet all of the
threecriteriaabove,proceedtoDeter-
mining Fresh-Air Flow For Fireplace
Location, page 6.
Continued
107031
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®
VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR FIREPLACE LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet 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: Space size 16 ft. (length) x 14 ft. (width) x 8 ft. (ceiling height) = 1792 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 1000 Btu/Hr per 50 cubic feet to determine the maximum Btu/Hr the space can support.
_____________________(volume of space) x 1000 Btu/Hr = (Maximum Btu/Hr the space can support) 50 Cubic Feet
Example: 1792 Cubic Feet (volume of space) x 1000 Btu/Hr ÷ 50 Cubic Feet= 35,840 Btu/Hr. This is the maximum Btu/Hr the
space can support.
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free fireplace
Gas water heater*
Gas furnace
________________________ Btu/Hr
________________________ Btu/Hr
________________________ Btu/Hr
________________________ Btu/Hr
________________________ Btu/Hr
Example:
Gas water heater
Vent-free fireplace + 10,000 Btu/Hr
Total 40,000 Btu/Hr
30,000 Btu/Hr
Vented gas heater
Gas fireplace logs
=
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.
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: 35,840 Btu/Hr (maximum the space can support)
40,000 Btu/Hr (actual amount of Btu/Hr used)
The space in the above example is a confinedspace because the actual Btu/Hr used is more than the maximum Btu/Hr the space cansupport.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 7.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.
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 National Fuel Gas Code, ANS Z223.1, Section 5.3 or applicable local codes.
107031
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OWNER’S MANUAL
AIR FOR
COMBUSTION AND
12"
VENTILATION
Continued
VENTILATION AIR
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
into Adjoining
Room,
Ventilation Air From Inside
Building
Or
Remove
Door into
Adjoining
Room,
Option 1
Thisfreshairwouldcomefromanadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide 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 5). You can also
remove door into adjoining room (see op-
tion 3, Figure 5). Follow the National Fuel
Gas Code, NFPA 54/ANS Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
Option 3
12"
Figure 5 - Ventilation Air from Inside Building Shown with Optional Mantel
WARNING: Rework work-
sheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Ventilated
Outlet
Attic
Air
Outlet
Air
To Attic
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
orspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces. Follow the
National Fuel Gas Code, NFPA 54/ANS
Z223.1,Section5.3,AirforCombustionand
Ventilation for required size of ventilation
grills or ducts.
To
Crawl
Space
Inlet
Air
Ventilated
Inlet Air
Crawl Space
Figure 6 - Ventilation Air from Outdoors Shown with Optional Mantel
IMPORTANT:Do not provide openings for
inlet or outlet air into attic if attic has a
thermostat-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.
107031
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VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
sign-certifiedequipmentshutoffvalvefrom
your dealer. See Accessories, page 27.
INSTALLATION
CAUTION:Thisheatercreates
warmaircurrents.Thesecurrents
moveheattowallsurfacesnextto
heater. Installing heater next to
vinyl or cloth wall coverings or
operatingheaterwhereimpurities
(suchastobaccosmoke,aromatic
candles, cleaning fluids, oil or
kerosene lamps, etc.) in the air
exist, may discolor walls.
NOTICE: This heater is intended
for use as supplemental heat. Use
this heater along with your pri-
mary heating system. Do not in-
stall this heater as your primary
heat source. If you have a central
heating system, you may run
system’scirculationblowerwhile
using heater. This will help circu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater as
your primary heat source.
Note:Ifdesired,purchaseafour-sidedbrass
trim kit for built-in installations. See Acces-
sories, page 27.
LOCATING FIREPLACE
WARNING: Maintain the mini-
mum clearances shown in Figure
7 and Figure 8, page 9. If you can,
provide greater clearances from
floor, ceiling, and joining wall.
CAUTION: If you install the
fireplace in a home garage
• fireplacepilotandburnermust
be at least 18 inches above
floor.
NOTICE: If you install the fire-
place in a bedroom, some build-
ing codes require that the fire-
place/mantel system be secured
to (or within) a wall. You can po-
sitionfireplaceinanoptionalcabi-
net or corner mantel. You can
alsorecessfireplaceintothewall.
WARNING: A qualified ser-
vicepersonmustinstallfireplace.
Follow all local codes.
• locate fireplace where moving
vehicle will not hit it.
For convenience and efficiency, install
fireplace
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 on the
rear, sides, or top of your fireplace, except
where standoff spacers are integrally at-
tached. If standoff spacers are attached to
your fireplace, these spacers can be placed
directly against wall or framing materials.
• where there is easy access for operation,
inspection, and service
If your fireplace is to be used with an optional
mantel, the installation instructions included
with your mantel shows an CSA/AGA ap-
provedmethodofattachingthefireplace/man-
tel system to a wall. IMPORTANT: Only use
optionalcabinetorcornermantelsspecifiedin
this manual. Purchase the optional mantel
from your dealer (see Accessories, page 27).
• in coldest part of room
An optional blower kit is available from
your dealer. See Accessories, page 27. If
planning to use blower, follow instructions
provided with the blower for power source.
Use the dimensions shown for rough open-
ings to create the easiest installations (see
Built-In Fireplace Installation, page 9).
IMPORTANT:Vent-freefireplacesaddmois-
ture to the air. Although this is beneficial,
installing fireplace in rooms without enough
ventilationairmaycausemildewtoformfrom
too much moisture. See Air for Combustion
and Ventilation, pages 5 through 7.
Ifyourfireplaceistoberecessedintothewall,
see Built-In Fireplace Installation, page 9, to
secure your fireplace into the wall.
CHECK GAS TYPE
Use only natural gas. If your gas supply is
not natural gas, do not install fireplace. Call
the dealer where you bought your fireplace
for the proper type fireplace.
WARNING: Never install the
fireplace
• in a bathroom
CEILING
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objectsarelessthan36inches
from the front, top, or sides of
the fireplace
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
INSTALLATION ITEMS
36"
Minimum
Before installing fireplace, make sure you
have the items listed below.
6"
Minimum
From
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve*
• test gauge connection*
• ground joint union
• sediment trap
Sides Of
Fireplace
Left
Side
Right
Side
• tee joint
• pipe wrench
FLOOR
*AnCSA/AGAdesign-certifiedequipment
shutoff valve with 1/8" NPT tap is an ac-
ceptable alternative to test gauge connec-
tion. Purchase the optional CSA/AGA de-
Figure7-MountingClearancesAsViewed
From Front of Fireplace Shown Built In
The Wall
107031
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OWNER’S MANUAL
5. Carefully set fireplace in front of rough
opening with back of fireplace inside
wall opening.
INSTALLATION
Continued
CEILING
6. Attach flexible gas line to fireplace gas
regulator. See Connecting Fireplace to
Gas Supply, page 15.
10 1/2"
26 7/8"
36"
Minimum
7. If the optional blower has been installed
Top Of
3/4" Off
The Floor
Minimum
connect blower to electrical source.
Mantel Can
Be Flush
With Wall
Options one and two: Route blower
electrical cord through side or rear ac-
cess door of fireplace. Plug electrical
cord into electrical outlet.
26 7/8"
Figure9-RoughOpeningforInstallingin
Wall
Right
Side
Option three: Have a licensed electri-
cian connect blower to electrical source
at junction box inside fireplace.
Left
Side
36 5/8"
25 7/8"
8. Bend four nailing flanges on outer cas-
ing with pliers (see Figure 11).
26 7/8"
51 3/4"
9. Attach fireplace to wall studs using
nails or wood screws through holes in
nailing flange.
Figure8-MountingClearancesAsViewed
From Front of Fireplace Shown with Op-
tional Mantel
Figure 10 - Rough Opening for Installing
in Corner
10. Check all gas connections for leaks. See
Checking Gas Connections, page 16.
BUILT-IN FIREPLACE
INSTALLATION
2. An optional blower accessory is avail-
able (see Accessories, page 27). There
are three options for connecting blower
to electrical source.
11. If using optional brass trim kit, install
the trim after final finishing and/or
painting of wall. See instructions in-
cluded with brass trim accessory for at-
taching brass trim.
Built-ininstallationofthisfireplaceinvolves
installing fireplace into a framed-in enclo-
sure. This makes the front of fireplace flush
with wall. An optional brass trim kit acces-
sory is available (see Accessories, page 27).
Brasstrimwillextendpastsidesoffireplace
approximately 1/2 inch. This will cover the
rough edges of the wall opening. If install-
ingabuilt-inmantelabovethefireplace, but
you must follow the clearances shown in
Figure 12, page 10. Follow the instructions
below to install the fireplace in this manner.
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 on the
rear, sides, or top of your fireplace.
Option one: Install fireplace near an
electrical outlet. See Blower Instruc-
tions for power cord length.
Option two: Have a licensed electrician
install a properly grounded, three-prong
120-volt electrical outlet at fireplace
location. Locate outlet inside the
framed enclosure. Blower power cord
will plug into this outlet.
Nails or
Wood
Screws
Option three: Have a licensed electri-
cian connect blower to electrical source
at junction box inside fireplace.
If using option one, have electrical out-
let installed at this time. If using option
two, do not connect blower to electrical
source at junction box until step 7.
Actual
26"
Framing
26 7/8"
26 7/8"
10 1/2"
3/4"
Nailing
Flanges
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.
Height
Front Width
Depth
26 3/4"
9 1/2"
3/4"
Bottom
Figure 11 - Attaching Fireplace to Wall
Studs
1. Frame in rough opening. Use dimensions
shown in Figure 9 for the rough opening.
4. If you have not assembled firebox, fol-
low instructions on page 4.
If installing in a corner, use dimensions
shown in Figure 10 for the rough open-
ing. The height is 26 7/8" which is the
same as the wall opening above.
Continued
107031
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VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
8. Place assembly next to wall at installa-
OPTIONAL MANTEL
INSTALLATION
INSTALLATION
tion location.
Continued
9. Remove brass trim kit and mantel. Be
Note: Refer to instructions provided with
Mantel Clearances for Built-In
Installation
careful not to damage wall or mantel.
the mantel for assembly instructions. Refer
to instructions below for system installa-
tion. Refer to instructions on page 4 for
firebox assembly. Blower accessory should
be installed if it is being used (see Installing
Blower Accessory GA3400T, pages 11
through 13).
10. Attach wood base to floor with two 1 3/4"
black screws provided (see Figure 14). If
the floor is concrete use anchor method
(see AttachingWood Base to Solid Floor,
page 14).
If placing mantel above built-in fireplace,
youmustmeetminimumclearancebetween
mantel shelf and top of fireplace opening.
NOTICE:Surfacetemperaturesof
adjacent walls and mantels be-
comehotduringoperation.Walls
and mantels above the firebox
may become hot to the touch. If
installedproperly,thesetempera-
turesmeettherequirementofthe
national product standard. Fol-
low all minimum clearances
shown in this manual.
11. Install gas line. See Connecting To Gas
Supply, page 14.
1. Unscrew four brass screws that attach
top louver to fireplace. Remove louver
from fireplace and set aside.
12. Check for leaks. See Checking Gas
Connections, page 16.
13. Place mantel around fireplace. Be care-
ful not to damage wall or mantel.
2. Place fireplace on wood base.
3. Place mantel around fireplace/base as-
sembly.
14. Place brass trim kit on the shoulder
screws located on the side and top of
the fireplace. Firmly snap the brass trim
over the shoulder screws on fireplace
(see Figure 13).
4. Assemble brass trim kit. See Assem-
bling Brass Trim, page 11.
5. Firmly snap brass trim kit on shoulder
screws. Shoulder screws are located on
fireplace cabinet (see Figure 13).
NOTICE: If your installation does
notmeettheminimumclearances
shown, you must do one of the
following:
• raise the mantel to an accept-
able height
15. Adjust assembly to remove any gaps.
Attach remaining two 3" wood screws
from hardware pack through openings
inside of fireplace sides into the man-
tel. The openings are located at top be-
hind the area for the brass louvers (see
Figure 13).
6. Align brass trim kit for flush fit around
opening.
7. Use two 3" wood screws provided and
attach fireplace base to wooden base
(see Figure 13).
• remove the mantel
16. Reinstall top brass louvers.
Mantel Shelf
Shoulder
Screws
10"
Note:
8"
6"
All vertical
measurements
are from top of
fireplace
opening to
bottom of
Hole for 3"
Wood Screw
for Attaching
Fireplace to
Mantel
1
2 /2"
mantel shelf. All
measurements
are in inches.
Hole for 3"
Wood Screw
for Attaching
Fireplace to
Wooden Base
Assembled
Brass Trim
Figure 13 - Attaching Brass Trim to Fireplace
Side of
Firebox
1 3/4" Screw
Wood Base
Figure 12 - Minimum Mantel Clearances
for Built-In Installation
Figure 14 - Attaching Wood Base to Floor
107031
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OWNER’S MANUAL
Branch
Support
INSTALLING BLOWER
ACCESSORY GA3400T
INSTALLATION
Shoulder
Screw
Continued
Removing Upper Louver
Assembly
Assembling Brass Trim (Brass
trim shipped with mantel)
1. Remove packaging from three remain-
ing pieces of brass trim.
Remove
Screw
To install the blower accessory, you must
first remove the upper louver assembly.
Valve
Cover
Shield
2. Locate two adjusting plates with set
screws, and two shims in the hardware
packet.
1. Lift screen off heater.
2. Remove 4 screws from louver assem-
bly (see Figure 16). Save these screws.
2
3. Align shim under adjusting plate as
shown in Figure 15.
3. Pull louver assembly straight out from
the cabinet. Be careful not to scratch
the paint. Set louver assembly and
screws aside.
4. Slide one end of adjusting plate/shim
in slot on mitered edge of top brass trim
(see Figure 15).
1
Blower Bracket
Mounting Holes
5. Slide other end of adjusting plate/shim
in slot on mitered edge of side brass
trim (see Figure 15).
Bottom Louver
Assembly
Snap
Bushings
6. While firmly holding edges of brass
trim together, tighten both set screws
on the adjusting plate with slotted
screwdriver.
Figure 17 - Removing Valve Cover Shield
Installing Blower Assembly
7. Repeat steps 1 through 6 for other corner.
8. Set brass assembly aside for later in-
stallation.
Upper Louver
Assembly
CAUTION: Label all wires
priortodisconnectionwhenser-
vicing controls. Wiring errors
can cause improper and danger-
ous operation.
Brass Screws
Top Brass Trim
Figure 16 - Removing Upper Louver As-
sembly
Set
Screws
Slot
Removing Valve Cover Shield
CAUTION: Verify proper op-
eration after servicing.
Mitered
Edge
1. Open bottom louver assembly by
swinging the assembly down (see Fig-
ure 17).
Shim
Side Brass
Trim
Note: If you are using a mantel with your
heater, use the following instructions. If
your heater is built-in, see For Built-In In-
stallation on page 13.
Adjusting
Plate
2. Using short Phillips screwdriver, re-
move the screw under the center of the
branch support. Rotate valve cover
shield clockwise and slide out.
IMPORTANT: Do not remove shoul-
der screw on the left side of valve cover
shield. Slide the valve cover shield off
of the shoulder screw (see Figure 17).
Slot
1. Install snap bushings found in hardware
kit into both holes in rear of valve cover
shield.
Figure 15 - Assembling Brass Trim
2. Make sure the wire harness is firmly
connected to the terminals on the blower
bracket assembly.
Note: If you do not have a short Phillips
screwdriver, the screen, logset, and
branch support must be removed so a
longer screwdriver may be used. See
Connecting Fireplace To Gas Supply,
page 15 and follow step 2.
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 18, page 12).
Continued
107031
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VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
6. Route the wire harness through the 9. Install the switch plate on the valve
INSTALLATION
hole in left side of baffle. Pull wire
harness through lower opening above
where the valve shield was removed.
(see Figure 18).
cover shield with 2 #10 screws provided
(see Figure 19). Reinstall the valve
cover shield. Route power cord out of
the cabinet by inserting it through the
bushing on the outer casing (see Fig-
ure 18). Plug fan kit into 120-Volt
grounded power supply and test opera-
tion. 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 assem-
bly and hood if previously removed,
(see Figure 16, page 11). Close lower
louver door.
Continued
4. Carefully disconnect green and white
wires at their insulated connectors.
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 18).
5. In top of the heater cabinet, locate the
four mounting holes on the outer cas-
ing. Align these four holes with those
on the blower bracket assembly. Attach
blower bracket assembly to the outer
casing with 4 #10 screws provided (see
Figure 18).
8. Reconnect red wire to switch position
3. Reconnect blue wire to switch posi-
tion 1. Reconnect green and white wires.
Wiring Routing
Hole in Baffle
Blower Bracket
Assembly
Screw
Baffle
Valve Cover
Shield
Wire
Harness
Switch
Plate
Switch
Screw
Power
Cord
Figure19-InstallingSwitchPlatetoValve
Cover Shield
3
2
1
Red
Blue
Switch
Plate
Wire
Harness
Valve Cover
Shield
Box Cover
Figure 18 - Installing Blower Bracket Assembly
107031
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OWNER’S MANUAL
Fan Switch
Extension Cord
(Auto/Off/On)
INSTALLATION
Auto
1
2
Off
3
Thermostat
Switch
(N.O.)
Blue
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 enoughto 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.
Continued
On
Blue
For Built-In Installation
110/115
V.A.C.
Red
Blower
Motor
Black
Red
White
Green
White
Green
WARNING: A licensed elec-
trician must connect the wiring
harness to electrical supply fol-
lowing all local codes. Electri-
cian must provide a clamp on
the box cover to secure the wir-
ing. Wiring should be routed
through the bushing in the hole
on the outer casing of heater.
Figure 20 - Wiring Diagram For Blower
Accessory Built-In Installation
Blower Bracket
Assembly
Screw
Follow instructions Removing Valve Cover
Shield (page 11), then
1. Install a snap bushing found in hard-
ware kit into one of the holes found on
rear of valve cover shield. The other
hole is for a strain relief clamp (not
supplied) to secure incoming electrical
supply.
2. Follow steps 2 through 6 in Installing
Blower Assembly, pages 11 and 12.
Also remove black wire from middle
switch terminal 2.
Switch
Wire
Harness
Power
Cord
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.
Outlet
Receptacle
3
2
1
Red
Blue
4. A licensed electrician must follow the
wiring diagram to connect incoming
electrical supply to fan kit wiring har-
ness (see Figure 20).
Switch Plate
Plastic Wire
Strap
5. Plug power cord to the outlet receptacle
(not provided) as shown in figure 21.
Wind the extra cable in power cord and
tie it up with the plastic wire strap (see
Figure 21). Set the cable bundle be-
tween the burner bracket and outer cas-
ing, away from the burner.
Valve
Cover
Shield
Box Cover
Wire
Harness
Clamp Connector
(not included)
6. Reinstall valve cover shield.
Figure 21 - Installing Blower Bracket Assembly
7. Test to make sure the blower is work-
ing properly.
8. Reinstall upper louver assembly and
hood if previously removed, (see Figure
16, page 11). Close lower louver door.
Continued
107031
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VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
Apply pipe joint sealant lightly to male
INSTALLATION
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of
1/2" or greater diameter to al-
low proper gas volume to fire-
place. If pipe is too small, un-
due loss of pressure will occur.
threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe
could result in clogged fireplace valves.
Continued
Attaching Wood Base to Solid
Floor
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
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.
We recommend that you install a sediment
trap in supply line as shown in Figure 23.
Locate sediment trap where it is within
reach for cleaning. Install in piping system
betweenfuelsupplyandheater.Locatesedi-
ment trap where trapped matter is not likely
to freeze. A sediment trap traps moisture
and contaminants. This keeps them from
going into fireplace controls. If sediment
trap is not installed or is installed wrong,
fireplace may not run properly.
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 heater (see Figure 23).
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 22.
3. Insert floor anchor (wings first) into
hole. Tap anchor flush to floor.
IMPORTANT:Installanequipmentshutoff
valve in an accessible location. The equip-
ment shutoff valve is for turning on or shut-
ting off the gas to the appliance.
4. Insert mounting screws through base
and into floor anchors.
5. Tighten screws until base is firmly fas-
tened to floor.
Approved Flexible
Gas Line
CSA/AGA Design-Certified Equipment
Shutoff Valve With 1/8" NPT Tap*
Figure 22 - Folding Anchor
CONNECTING TO GAS
SUPPLY
From Gas
Meter (5"
W.C. to
WARNING: This appliance re-
quires a 45° male flare fitting 5/8"-
18 UNF (Unified National Fine
Thread) inlet connection and the
flexible gas line provided.
10.5" W.C.
Pressure)
3" Minimum
WARNING: A qualified ser-
vice person must connect fire-
place to gas supply. Follow all
local codes.
Pipe Nipple Cap Tee Joint
Sediment Trap
Figure 23 - Gas Connection
WARNING: Never connect
fireplace to private (non-utility)
gas wells. This gas is commonly
known as wellhead gas.
* Purchase the optional CSA/AGA design-certified equipment shutoff valve from your
dealer. See Accessories, page 27.
IMPORTANT:Check gas line pressure be-
fore connecting fireplace to gas line. Gas
line pressure must be no greater than 14
inchesofwater.Ifgaslinepressureishigher,
fireplace regulator damage could occur.
107031
14
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OWNER’S MANUAL
INSTALLATION
Continued
Branch
Support
CONNECTING FIREPLACE
TO GAS SUPPLY
Installation Items Needed
• Phillips screwdriver
Shoulder
Screw
• sealant (resistant to propane/LPgas, not
provided)
Flexible Gas
Line
1. Remove fireplace screen. Remove two
screws that hold fireplace screen in
place for shipping. These screws are
located near top of screen. Discard
screws. Lift fireplace screen up and pull
out to remove.
2. Remove screws that attach branch sup-
port to fireplace (see Figure 24). Care-
fully lift up branch support and remove
from fireplace (see Figure 24).
Screen
Figure 24 - Removing Log Base Assembly From Fireplace
3. Route flexible gas line (provided by
installer) from equipment shutoff valve
into fireplace through side or rear ac-
cess holes in outer casing. Route flex-
ible gas supply line through fireplace
access holes in outer casing.
Gas Connector
To Fireplace
Gas Regulator
Equipment Shutoff Valve
NOTICE:Mostbuildingcodesdo
not permit concealed gas con-
nections. A flexible gas line is
provided to allow accessibility
fromthefireplace(seeFigure25).
The flexible gas supply line con-
nection to the equipment shutoff
valve should be accessible.
To Gas
Supply
Flexible Gas Line from
Fireplace Gas Regulator
Provided With Fireplace
Equipment Shutoff Valve
Flexible Gas Line from
Provided By Installer
Figure 25 - Attaching Flexible Gas Lines Together
4. Apply pipe joint sealant lightly to male
threads of gas connector attached to
flexible gas line (see Figure 25). Con-
nect flexible gas line to flexible gas line
attached to gas regulator of fireplace
(see Figure 25).
5. Check all gas connections for leaks. See
Checking Gas Connections, page 16.
6. Replace branch support back into fire-
place. Feed flexible gas line into fire-
place base area while replacing branch
support. Make sure the entire flexible
gas line is in fireplace base area. Reat-
tach branch support to fireplace with
screws removed in step 2.
Continued
107031
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VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
Pressure Testing Fireplace Gas
Connections
1. Open equipment shutoff valve (see Fig-
INSTALLATION
Continued
1. Close equipment shutoff valve (see Fig-
ure 26).
ure 26).
CHECKING GAS
CONNECTIONS
2. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
2. Open main gas valve located on or near
gas meter.
WARNING: Test all gas pip-
3. Make sure control knob of fireplace is
in the OFF position.
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
3. Check all joints from gas meter to
equipment shutoff valve (see Figure
27). Apply mixture of liquid soap and
water to gas joints. Bubbles forming
show a leak.
4. Check all joints from equipment shutoff
valve to thermostat gas valve (see Fig-
ure 27). Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
to all joints. Bubbles forming
show a leak. Correct all leaks at
once.
4. Correct all leaks at once.
5. Correct all leaks at once.
6. Light fireplace (see Operating Fire-
place, pages 17 and 18). Check all other
internal joints for leaks.
Equipment
Shutoff
Valve
Open
7. Turn off fireplace (see To Turn Off Gas
Pressure Testing Gas Supply
Piping System
to Appliance, page 18).
8. Replace front panel.
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
Closed
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment shutoff valve from gas supply pip-
ing system. Pressures in excess of 1/2
psig will damage heater regulator.
Figure 26 - Equipment Shutoff Valve
2. Cap off open end of gas pipe where
equipment shutoff valve was connected.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
main gas valve located on or near gas
meter.
Equipment
Shutoff
Valve
Gas Meter
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Reconnect fireplace and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
Figure 27 - Checking Gas Joints
107031
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OWNER’S MANUAL
Note: You may be running this fire-
place for the first time after hooking
up to gas supply. If so, the control
knob may need to be pressed in for
30 seconds. This will allow air to
bleed from the gas system.
• If control knob does not pop up
when released, contact a qualified
service person or gas supplier for
repairs.
LIGHTING
INSTRUCTIONS
OPERATING
FIREPLACE
WARNING: You must operate
this fireplace with the fireplace
screen in place. Make sure fire-
place screen is installed before
running fireplace.
FOR YOUR SAFETY
READ BEFORE
LIGHTING
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
NOTICE: During initial operation
of new fireplace, burning logs
will give off a paper-burning
smell.Openwindowtoventsmell.
Operate fireplace on HI position
to burn off odor. This will only
last a few hours.
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.
A. This appliance has a pilot which must
be lighted by hand. When lighting the
pilot, follow these instructions exactly.
Note: If pilot does not stay lit, refer
to Troubleshooting, pages 20 through
22. 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, page 18.
1. STOP! Read the safety information,
column 1.
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.
2. Make sure equipment shutoff valve
is fully open.
3. Turn control knob clockwise
Clockwise
WHAT TO DO IF YOU SMELL
GAS
to the OFF position.
7. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
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 in-
formation, column 1. If you don’t
smell gas, go to the next step.
• 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 sup-
plier, call the fire department.
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.
5. Turn control knob counterclockwise
8. Turn control knob counterclockwise
to the PILOT position. Press
in control knob for five (5) seconds
(see Figure 28).
C-clockwise
to desired heating level. The
C-clockwise
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.
main burner should light. Set control
knob to any heat level between HI
and LO.
Ignitor Button
Control Knob
CAUTION:Donottrytoadjust
heatinglevelsbyusingtheequip-
ment shutoff valve.
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 un-
der water.
Ignitor Electrode
Thermocouple
Pilot Burner
Figure 28 - Control Knob In The OFF
Position
Figure 29 - Pilot
(Actual Pilot May Vary From Illustration)
Continued
107031
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VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under Light-
OPERATING
FIREPLACE
Continued
ing Instructions, page 17.
2. With control knob pressed in, strike
TO TURN OFF GAS
match. Hold match to pilot until pi-
lot lights.
TO APPLIANCE
Shutting Off Fireplace
1. Turn control knob clockwise
to the OFF position.
3. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob. Now
follow step 8, page 17.
2. Turn off all electric power to the ap-
pliance if service is to be performed.
OPERATING BLOWER
Shutting Off Burner Only (pilot
stays lit)
This blower has three settings: ON, OFF,
andAUTO.IntheONposition,theblower
will operate constantly. In the OFF posi-
tion, the blower will not operate. In the
AUTOposition,theblowerwillstartwhen
thethermostatsensesasufficientincrease
in firebox temperature.
Turn control knob clockwise
the PILOT position.
to
Thermostat Control Operation
The thermostat used on this fireplace
senses the room temperature. At times
the room may exceed the set tempera- Note: Your fireplace and thermostat
ture. If so, the burner will shut off. The blower will not turn on and off at the
burner will cycle back on when room same time. The fireplace may run for
temperature drops below the set tem- several minutes before the blower turns
perature.
on.Aftertheheatermodulatestothepilot
position, the blower will continue to run.
The blower will shut off after the firebox
temperature decreases.
The control knob can be set to any heat
level between HI and LO.
Note: The thermostat sensing bulb mea-
sures the temperature of air near the
fireplace cabinet. This may not always
agree with room temperature (depend-
ing on housing construction, installation
location, room size, open air tempera-
tures, etc.). Frequent use of your fire-
place will let you determine your own
comfort levels.
Note: It is safe to operate fireplace with
blower turned off. However, the blower
helps distribute heated air from the
fireplace.
Auto/Off/On Switch
ON
OFF
Figure 30 - Auto/Off/On Switch
107031
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OWNER’S MANUAL
BURNER FLAME PATTERN
INSPECTING
BURNER
Figure 33 shows a correct burner flame
pattern.Figure34showsanincorrectburner
flame pattern. The incorrect burner flame
pattern shows the flame consistently higher
than one inch above the log.
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Ifburnerflamepatternisincorrect,asshown
in Figure 34
Figure31showsacorrectpilotflamepattern.
Figure 32 shows an incorrect pilot flame
pattern.Theincorrectpilotflameisnotprop-
erlyheatingthethermocouple.Thiswillcause
the thermocouple to cool. When the thermo-
couple cools, the fireplace will shut down.
• turn fireplace off (see To Turn Off Gas to
Appliance, page 18)
• see Troubleshooting, pages 20 through 22
Top of Flame About
One Inch Below Logs
If pilot flame pattern is incorrect, as shown
in Figure 32
• turn fireplace off (see To Turn Off Gas to
Appliance, page 18)
• see Troubleshooting, pages 20 through 22
Thermocouple
Pilot Burner
Figure 33 - Correct Burner Flame Pattern
Top of Flame Consistently About
One Inch Higher Than Logs
Figure 31 - Correct Pilot Flame Pattern
(Actual Pilot May Vary From Illustration)
Figure 34 - Incorrect Burner Flame Pattern
Thermocouple
Pilot Burner
Figure 32 - Incorrect Pilot Flame Pattern
(Actual Pilot May Vary From Illustration)
107031
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VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
TROUBLESHOOTING
Note: For additional help, visit DESA
International’stechnicalservicewebsite
WARNING: Turn off and un-
plug fireplace and let cool before
servicing. Only a qualified ser-
vice person should service and
repair fireplace.
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot.ThiscandamageODS/
pilot unit.
Note:Alltroubleshootingitemsarelistedin
order of operation.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
When ignitor button is pressed, there is no 1. Ignitor cable pinched or wet
spark at ODS/pilot
1. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
2. Ignitor electrode not connected to ignitor 2. Reconnect ignitor cable
cable
3. Broken ignitor cable
4. Bad piezo ignitor
5. Ignitor electrode broken
6. Ignitor electrode positioned wrong
3. Replace ignitor cable
4. Replace piezo ignitor
5. Replace ignitor
6. Replace ignitor
When ignitor button is pressed, there is 1. Gas supply turned off or equipment 1. Turn on gas supply or open equipment
spark at ODS/pilot but no ignition
shutoff valve closed
shutoff valve
2. Control knob not in PILOT position
2. Turn control knob to PILOT position
3. Control knob not pressed in while in 3. Press in control knob while in PILOT
PILOT position
position
4. Air in gas lines when installed
4. Continue holding down control knob. Re-
peat igniting operation until air is removed
5. Clean ODS/pilot (see Cleaning and
Maintenance, page 23) or replace ODS/
pilot assembly
5. ODS/pilot is clogged
6. Gas regulator setting is not correct
6. Replace gas regulator
ODS/pilot lights but flame goes out when 1. Control knob not fully pressed in
1. Press in control knob fully
control knob is released
2. Control knob not pressed in long enough 2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Safety interlock system has been triggered 3. Wait one minute for safety interlock sys-
tem to reset. Repeat ignition operation
4. Equipment shutoff valve not fully open 4. Fully open equipment shutoff valve
5. Thermocouple connection loose at con- 5. Hand tighten until snug, then tighten 1/4
trol valve
turn more
6. Pilot flame not touching thermocouple, 6. A) Contact local natural gas company
which allows thermocouple to cool,
causing pilot flame to go out. This prob-
lem could be caused by one or both of
the following:
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 23) or replace ODS/
pilot assembly
A) Low gas pressure
B) Dirty or partially clogged ODS/pilot
7. Thermocouple damaged
8. Control valve damaged
7. Replace thermocouple
8. Replace control valve
107031
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OWNER’S MANUAL
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Burner does not light after ODS/pilot is lit
1. Burner orifice is clogged
1. Clean burner (see Cleaning and Mainte-
nance, page 23) or replace burner orifice
2. Replace burner orifice
2. Burner orifice diameter is too small
3. Inlet gas pressure is too low
3. Contact local natural gas company
Delayed ignition of burner
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Contact local natural gas company
2. Clean burner (see Cleaning and Mainte-
nance, page 23) or replace burner orifice
Burner backfiring during combustion
1. Burner orifice is clogged or damaged
1. Clean burner (see Cleaning and Mainte-
nance, page 23) or replace burner orifice
2. Replace burner pressure
2. Burner damaged
3. Low inlet gas pressure
3. Contact local natural gas company
4. Gas regulator defective
4. Replace gas regulator
Slight smoke or odor during initial operation 1. Residues from manufacturing processes 1. Problem will stop after a few hours of
operation
Fireplace produces a whistling noise when 1. Air in gas line
burner is lit
1. Operate burner until air is removed from
line. Have gas line checked by local
natural gas company
2. Air passageways on fireplace blocked
2. Observe minimum installation clearances
(see pages 8 through 10)
3. Dirty or partially clogged burner orifice 3. Clean burner (see Cleaning and Mainte-
nance, page 23) or replace burner orifice
Whitepowderresidueformingwithinburner 1. When heated, vapors from furniture pol- 1. Turn heater off when using furniture
box or on adjacent walls or furniture
ish, wax, carpet cleaners, etc. turn into
polish, wax, carpet cleaners, or similar
white powder residue
products
Continued
107031
21
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®
VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
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.
• Immediatelycallyourgassupplierfromaneighbor’sphone. Followthe
gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
IMPORTANT:Operatingfireplacewhereimpuritiesinairexistmaycreateodors.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.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Fireplace produces a clicking/ticking noise 1. Metal expanding while heating or con- 1. This is common with most fireplaces. If
just after burner is lit or shut off
tracting while cooling
noise is excessive, contact qualified ser-
vice person
Fireplace produces unwanted odors
1. Fireplace burning vapors from paint, hair 1. Ventilate room. Stop using odor caus-
spray, glues, etc. (See IMPORTANT
ing products while fireplace is running
statement above)
2. Gas leak. SeeWarning statement at 2. Locate and correct all leaks (see Check-
top of page
ing Gas Connections, page 16)
Fireplace shuts off in use (ODS operates)
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Open window and/or door for ventilation
2. Contact local natural gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 23)
Gas odor even when control knob is in OFF 1. Gas leak. SeeWarning statement at 1. Locate and correct all leaks (see Check-
position
top of page
ing Gas Connections, page 16)
2. Control valve defective
2. Replace control valve
Gas odor during combustion
1. Foreign matter between control valve 1. Take apart gas tubing and remove foreign
and burner matter
2. Gas leak. SeeWarning statement at 2. Locate and correct all leaks (see Check-
top of page
ing Gas Connections, page 16)
Moisture/condensationnoticedonwindows 1. Not enough combustion/ventilation air
1. Refer to Air for Combustion and Venti-
lation requirements (page 5)
107031
22
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OWNER’S MANUAL
4. Check the injector holder located at the
CLEANING AND
MAINTENANCE
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
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.
WARNING: Turn off fireplace
and let cool before cleaning.
• burner will have delayed ignition
• fireplace will not produce specified heat
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.
When Gas Quality Is Bad
• pilot will not stay lit
CAUTION: You must keep
control areas, burner, and circu-
lating air passageways of fire-
place clean. Inspect these areas
offireplacebeforeeachuse.Have
fireplace inspected yearly by a
qualified service person. Fire-
place may need more frequent
cleaning due to excessive lint
from carpeting, pet hair, bedding
material, etc.
• burner will produce flames and soot
• fireplace will backfire when lit
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 36). With the unit off, lightly
blow air through the air inlet hole. You may
blowthroughadrinkingstrawifcompressed
air is not available.
Youmayfeelyourgaspressureistoolowor
gas quality is bad. If so, contact your local
natural gas supplier.
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting.
Injector Holder
CLEANING BURNER
INJECTOR HOLDER AND
PILOT AIR INLET HOLE
If so, contact DESA International’s Techni-
cal Service Department at 1-800-323-5190.
Ports/Slots
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 cre-
ate soot. We recommend that you clean the
unit every three months during operation
and have heater inspected yearly by a quali-
fied service person.
You can also visit DESA International’s
technical services web site at
Burner
Tube
Primary Air Inlet
Holes
Figure 35 - Injector Holder On Outlet
Burner Tube
Wealsorecommendthatyoukeeptheburner
tube and pilot assembly clean and free of
dustanddirt.Tocleanthesepartswerecom-
mend using compressed air no greater than
30 PSI. Your local computer store, hard-
ware store, or home center may carry com-
pressed air in a can. You can use a vacuum
cleaner in the blow position. If using com-
pressed air in a can, please follow the direc-
tions on the can. If you don't follow direc-
tions on the can, you could damage the pilot
assembly.
Pilot Air Inlet Hole
Pilot
Assembly
Figure 36 - Pilot Inlet Air Hole
CABINET
1. Shut off the unit, including the pilot.
Allow the unit to cool for at least thirty
minutes.
Air Passageways
• Use a vacuum cleaner or pressurized air
to clean.
2. Inspect burner, pilot, and primary air
inlet holes on injector holder for dust
and dirt (see Figure 35).
Exterior
• Use a soft cloth dampened with a mild
soap and water mixture. Wipe the cabi-
net to remove dust.
3. Blow air through the ports/slots and
holes in the burner.
107031
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®
VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
ILLUSTRATED
PARTS
BREAKDOWN
3
VMH10TNB
1
17
9
7
29
4
8
10
8
3
3
2
11
4
32
42
4
14
25
24
28
20
12-1
23
8
13
36
31
19
14
34
33
38
39
37
41
25
5
12
6
24
18
38
35
12
15
27
22
40
26
21
16
30
107031
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OWNER’S MANUAL
PARTS LIST
KEY
NO.
VMH10TNA
PART NO.
DESCRIPTION
QTY.
VMH10TNB
1
2
3
4
5
6
7
8
102633-02CK
102624-02
099230-02
098304-01
103591-01
103209-03
102635-02CK
M11084-26
103209-01
104281-01
102638-01
104285-01
102460-01CJ
099211-01
103963-01
103671-01
100587-01
098303-02
104335-01CK
102649-02CK
099415-10
102875-01
101381-01
099387-03
098271-06
M11084-38
101004-12
098522-14
102639-01
101628-01
102869-01
102731-01
103295-01CJ
107153-01
104313-01
104313-02
M10908-2
Outer Casing Top
Outer Casing
Shoulder Screw
Screw, #10 x 3/8"
Burner
Louvered Door
Left and Right Side Front
Hex Head Screw, #10 x 3/8"
Brass Top Louver
Firebox Hood
1
1
14
16
1
1
2
31
1
1
1
1
1
2
1
1
4
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
2
1
1
2
1
This list contains replaceable parts used in
your fireplace. When ordering parts, follow
the instructions listed under Replacement
Parts on page 26 of this manual.
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Firebox Top
ODS/Pilot Assembly
Firebox Wrapper
Control Bracket Screw
Inlet Tube
Outlet Tube
Brass Screw, #6 x 3/8
Regulator Screw
Outer Shell Base
Branch Support
Gas Regulator
Regulator Bracket
Valve Cover and Piezo
Pilot Tube
Ignitor Cable
Screw #8 x 3/8
Injector
Gas Valve
Baffle
Flexible Connector
Control Bracket
Control Shield
Screen Assembly
Log Set
Hinge Pin (Right)
Hinge Pin (Left)
Hinge Screws
Burner Support
Pilot Bracket
3/8" NPT x 3/8" Flare Brass Fitting
Nut, M5
103734-01
101006-01
097809-03
098249-01
101629-02
Bushing
PARTS AVAILABLE — NOT SHOWN
101054-01
100563-01
103470-01
104319-04
Lighting Instructions Plate
Warning Plate
Hardware Package
Video, Instruction
1
1
1
1
107031
25
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®
VMH10TNB
VENT-FREE NATURAL GAS COMPACT FIREPLACE
SPECIFICATIONS
Input Rate
10,000 Btu/Hr
Natural Only
Piezo
Type Gas
Ignition
Pressure Regulator Setting
Inlet Gas Pressure (in. of water)*
Maximum
3" W.C.
10.5"
5"
Minimum
Dimensions, Inches (H x W x D)
Fireplace (including hood and screws)
Carton
25 7/8 x 26 13/16 x 9 3/8
32 5/8 x 27 3/16 x 11 5/8
Weight, pounds
Fireplace
Shipping
44 1/2 lbs.
48 lbs.
* For purposes of input adjustment
REPLACEMENT
PARTS
Note: Use only original replacement parts.
Thiswillprotectyourwarrantycoveragefor
parts replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s) call DESA International’s Technical
Service Department at 1-800-323-5190 for
referral information.
WhencallingDESAInternational,haveready
• your name
• your address
• model and serial numbers of your fireplace
• how fireplace was malfunctioning
• type of gas used (propane/LPor natural gas)
• purchase date
Usually, we will ask you to return the defec-
tive 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 International’s Parts De-
partment at 1-800-972-7879 for referral in-
formation.
WhencallingDESAInternational,haveready
• model number of your fireplace
• the replacement part number
107031
26
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OWNER’S MANUAL
CLEANING KIT - GCK
(Not Shown)
ACCESSORIES
Purchase these fireplace accessories from
your local dealer. If they cannot supply these
accessories call DESA International’s Sales
Department at 1-800-458-2472 for referral
information. You can also write to the ad-
dress listed on the back page of this manual.
Your vent-free gas appliance requires regu-
lar 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.
CABINET MANTEL WITH
BUILT-IN HEARTH BASE
AND TRADITIONAL SQUARE
LEG STYLING
EQUIPMENT SHUTOFF
VALVE - GA5010
Equipmentshutoffvalvewith1/8"NPTtap.
Unfinished - GM923U
Finished - GM922F
For use with fireplace. A hardwood mantel
and hearth base offers compact styling and
completes the fireplace look. Available in a
stained or an unfinished (ready to stain or
paint) Oak Veneer over hardwood. Com-
pleteassemblyinstructionsincluded.Three-
sided brass trim kit included.
CABINET MANTEL WITH
BUILT-IN HEARTH BASE AND
ROUNDED LEG STYLING
Unfinished - GM921U
BRASS TRIM KIT - GA6095
Optional four-sided brasstrim kit forrecessed
built-ininstallations(whenunitisraisedoffof
the floor. Provides a finished appearance by
covering rough edges of wall opening.
Walnut Finished - GM920F
Cherry Finished - GM924F
(Appearance May Differ by Model)
For use with fireplace. A hardwood mantel
and hearth base offers compact styling and
completes the fireplace look. Available in a
walnut finished, cherry fininshed, or an un-
finished hardwood, ready to stain or paint.
Complete assembly instructions included.
Three-sided brass trim kit included.
BRASS TRIM KIT - GA6094
Optional three-sided brass trim kit for cus-
tom and recessed installations (when unit is
on the floor). Provides a finished appear-
ance by covering rough edges of wall open-
ing. Included with all mantels.
CORNER MANTEL WITH
BUILT-IN HEARTH BASE
Unfinished - GM721U
Finished - GM720F
THERMOSTATICALLY -
CONTROLLED BLOWER KIT
GA3400T
Forusewithfireplace. Space-savingmantel
andhearthbasecornerdesignfeaturesclean,
classic lines. Available in a walnut finish or
an unfinished hardwood, ready to stain or
paint. Complete assembly instructions in-
cluded. Three-sided brass trim kit included.
Providesbetterheatdistribution.Makesfire-
place more efficient. Automatically turns
off and on as needed.
107031
27
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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 NATURAL GAS COMPACT CLASSIC HEARTH® FIREPLACE
DESA International 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
fireplacetoproperoperatingconditionandanallowanceforlaborwhenprovidedbyaDESAAuthorizedServiceCenter.Warranty
part(s) MUST be obtained through authorized dealers of this product and/or DESA International 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.
Thiswarrantydoesnotapplytopartsthatarenotinoriginalconditionbecauseofnormalwearandtear,orpartsthatfailorbecomedamaged
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
LIMITSTHEDURATIONOFANYANDALLIMPLIEDWARRANTIES,INCLUDINGWARRANTIESOFMERCHANTA-
BILITY 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 INTERNATIONAL’S
LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA INTERNATIONAL
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
consequentialdamages, sotheabovelimitationonimpliedwarranties, orexclusionorlimitationondamagesmaynotapplytoyou.
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:
INTERNATIONAL
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
107031-01
REV. A
107031 01
03/00
NOT A UPC
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