FMI VMH10TNA Fireplace manual

®
VENT-FREE NATURAL GAS
COMPACT CLASSIC HEARTH® FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
VMH10TNA
10,000 Btu/Hr with
Thermostat
Shown with Optional
Cabinet Mantel/Hearth
Base Accessory
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 qualified installer, service
agency, or the gas supplier.
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
Air for Combustion and Ventilation section on page 5 of
this manual.
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
Save this manual for future reference.
®
VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
SAFETY
INFORMATION
WARNING ICON
G 001
WARNINGS
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 carbon 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 Gas: Natural gas is odorless. An
odor-making agent is added to natural gas.
The odor helps you detect a natural gas leak.
However, the odor added to natural gas can
fade. Natural 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
fireplace or its controls can be
dangerous.
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. 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
3. This fireplace shall not be installed in
a bathroom.
4. Never install the fireplace
• 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
5. Do not use this fireplace as a woodburning 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. You must operate this fireplace with the
fireplace screen in place. Make sure
fireplace screen is in place before running fireplace.
8. This fireplace is designed to be smokeless. If logs ever appear to smoke, turn
off fireplace and call a qualified service person. Note: During initial operation, slight smoking could occur due
to log curing and fireplace burning
manufacturing residues.
9. To prevent the creation of soot, follow
the instructions in Cleaning and Maintenance, page 23.
10. 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 patterns can
cause sooting.
2
11. 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.
12. This fireplace needs fresh air ventilation
to run properly. This fireplace has an
oxygen depletion sensor (ODS) pilot
light safety system. The ODS shuts
down the fireplace if not enough fresh
air is available. See Air for Combustion
and Ventilation, pages 5 through 7. If
fireplace keeps shutting off, see Troubleshooting, pages 20 through 22.
13. Do not run fireplace
• where flammable liquids or vapors
are used or stored.
• under dusty conditions.
14. Do not use this fireplace to cook food
or burn paper or other objects.
15. Never place any objects in the fireplace
or on logs.
16. Fireplace front and screen becomes
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.
17. Carefully supervise young children when
they are in same room with fireplace.
18. 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.
19. Turn off and unplug fireplace and let
cool before servicing. Only a qualified
service person should service and repair fireplace.
20. Operating fireplace above elevations of
4,500 feet could cause pilot outage.
21. Do not use a blower insert, heat exchanger insert, or other accessory not
approved for use with this fireplace.
22. Do not operate fireplace if any log is
broken. Do not operate fireplace if a
log is chipped (dime-sized or larger).
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OWNER’S MANUAL
PRODUCT
IDENTIFICATION
PRODUCT
FEATURES
SAFETY PILOT
Fireplace
Cabinet
This fireplace has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
The ODS/pilot is a required feature for ventfree room fireplaces. The ODS/pilot shuts off
the fireplace if there is not enough fresh air.
Screen
PIEZO IGNITION SYSTEM
This fireplace has a piezo ignitor. This system requires no matches, batteries, or other
sources to light fireplace.
Logs
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.
Control Knob
Ignitor Button
Figure 1 - Vent-Free Natural Gas Compact Fireplace
LOCAL CODES
UNPACKING
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*.
1.
*Available from:
3.
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
4.
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
104408
2.
THERMOSTATIC HEAT
CONTROL
Remove log box and fireplace from
carton. The hood is not attached.
Remove all protective packaging applied to fireplace for shipment.
Make sure your fireplace includes one
hardware packet.
Check fireplace for any shipping
damage. If fireplace is damaged,
promptly inform dealer where you
bought fireplace.
3
®
VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
ASSEMBLY
Screen
Shipping
Screw
Back Log
Shoulder
Screw
WARNING: Always have
branch support and screen in
place before operating fireplace.
This prevents excessive temperatures on fireplace surfaces.
Burner
Support
ASSEMBLING FIREPLACE
Tools Required:
• Phillips screwdriver
• 5/16" hex wrench
• slotted screwdriver
Screw
Installing Log
1.
2.
3.
4.
5.
6.
7.
Remove back log, branch, and hood from
log box. Discard protective packaging.
Remove two shipping screws above
screen (see Figure 2).
Lift screen up and pull out to remove.
An optional blower is available. See Accessories, page 27. Install optional
blower now. Follow installation instructions provided with blower.
Gently place back log on burner support (see Figure 2). The log should fit
flat against top of burner support. Place
two #10 one-inch-long screws through
burner support into the log and tighten.
Place branch on branch support (see
Figure 2). Do not allow branch to contact flame. If flame contacts branch,
soot will be created.
Reattach screen by placing the notches
in the screen frame over the shoulder
screws and pushing down.
Branch
Support
Screw
Screen
Branch
Figure 2 - Assembling Fireplace
Assembling Hood
1.
2.
3.
Locate four #10-3/8" black phillips
sheet metal screws from the hardware
packet.
Slip top of hood between middle rail and
top of firebox wrapper (see Figure 3).
Attach four #10-3/8" hood screws as
shown in Figure 3.
Upper Louver
Assembly
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
Middle
Rail
Firebox
Wrapper
Hood
#10-3/8"
Screws
Figure 3 - Assembling Hood
4
104408
OWNER’S MANUAL
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 fuelburning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National
Fuel Gas Code. NFPA 54/ANS Z223.1, 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 5 through 7 will
help you classify your space and provide
adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusually tight construction is defined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a continuous water vapor retarder with
a rating of one perm (6 x 10-11 kg
per pa-sec-m2) 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 areas 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.
Confined and Unconfined Space
The National Fuel Gas Code (ANS Z223.1,
1992 Section 5.3) 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
unconfining 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.
This heater shall not be installed in a confined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.
* Adjoining rooms are communicating only
if there are doorless passageways or ventilation grills between them.
If your home meets all of the three
criteria above, you must provide additional fresh air. See Ventilation Air
From Outdoors, page 7.
If your home does not meet all of the
three criteria above, proceed to Determining Fresh-Air Flow For Fireplace
Location, page 6.
Continued
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5
®
VMH10TNA
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
________________________ Btu/Hr
Gas water heater*
________________________ Btu/Hr
Example:
Gas furnace
________________________ Btu/Hr
30,000
Gas water heater
Btu/Hr
Vented gas heater
________________________ Btu/Hr
10,000
Vent-free fireplace +
Btu/Hr
Gas fireplace logs
________________________ Btu/Hr
40,000
Total
=
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.
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 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:
A. Rework worksheet, adding the space of an adjoining 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, 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, 1992, Section 5.3 or applicable local codes.
6
104408
OWNER’S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
12"
Continued
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 NFPA 54/ANS Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
WARNING: Rework worksheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Ventilation
Grills
into Adjoining
Room,
Option 1
Ventilation Grills
Into Adjoining Room,
Option 2
Or
Remove
Door into
Adjoining
Room,
Option 3
12"
Figure 4 - Ventilation Air from Inside Building Shown with Optional Mantel
Outlet
Air
Outlet
Air
To Attic
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 NFPA 54/ANS
Z223.1, Section 5.3, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.
To
Crawl
Space
Inlet
Air
Inlet Air
Ventilated
Crawl Space
Figure 5 - 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-controlled power vent. Heated air
entering the attic will activate the power vent.
104408
Ventilated
Attic
7
®
VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
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 circulation 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.
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 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 installations (see
Built-In Fireplace Installation, page 9).
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.
INSTALLATION ITEMS
Before installing fireplace, make sure you
have the items listed below.
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve*
• test gauge connection*
• ground joint union
• sediment trap
• tee joint
• pipe wrench
manual shutoff valve from your dealer. See
Accessories, page 27.
Note: If desired, purchase a four-sided brass
trim kit for built-in installations. See Accessories, page 27.
LOCATING FIREPLACE
WARNING: Maintain the minimum clearances shown in Figure
6 and Figure 7, page 9. If you can,
provide greater clearances from
floor, ceiling, and joining wall.
NOTICE: If you install the fireplace in a bedroom, some building codes require that the fireplace/mantel system be secured
to (or within) a wall. You can position fireplace in an optional cabinet or corner mantel. You can
also recess fireplace into the wall.
If your fireplace is to be used with an optional mantel, the installation instructions
included with your mantel shows an AGA
approved method of attaching the fireplace/
mantel system to a wall. IMPORTANT:
Only use optional cabinet or corner mantels
specified in this manual. Purchase the optional mantel from your dealer (see Accessories, page 27).
If your fireplace is to be recessed into the wall,
see Built-In Fireplace Installation, page 9, to
secure your fireplace into the wall.
WARNING: Never install the
fireplace
• in 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 heater creates
warm air currents. These currents
move heat to wall surfaces next to
heater. Installing heater next to
vinyl or cloth wall coverings or
operating heater where impurities
(such as tobacco smoke, aromatic
candles, cleaning fluids, oil or
kerosene lamps, etc.) in the air
exist, may discolor walls.
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 27. If
planning to use blower, follow instructions
provided with the blower for power source.
IMPORTANT: Vent-free fireplaces add moisture 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 5 through 7.
CEILING
36"
Minimum
6"
Minimum
From
Sides Of
Fireplace
Right
Side
Left
Side
FLOOR
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified
Figure 6 - Mounting Clearances As Viewed
From Front of Fireplace Shown Built In
The Wall
8
104408
OWNER’S MANUAL
5.
INSTALLATION
Continued
CEILING
10 1/2"
26 7/8"
36"
Minimum
Top Of
Mantel Can
Be Flush
With Wall
3/4" Off
The Floor
Minimum
26 7/8"
Figure 8 - Rough Opening for Installing in
Wall
Right
Side
Left
Side
36 5/8"
25 7/8"
Figure 7 - Mounting Clearances As Viewed
From Front of Fireplace Shown with Optional Mantel
BUILT-IN FIREPLACE
INSTALLATION
26 7/8"
51 3/4"
Figure 9 - Rough Opening for Installing in
Corner
2.
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 brass trim kit accessory is available (see Accessories, page 27).
Brass 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, but
you must follow the clearances shown in
Figure 11, 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.
Actual
Framing
26"
26 7/8"
Front Width
26 3/4"
26 7/8"
Depth
9 1/2"
10 1/2"
Bottom
3/4"
3/4"
Height
1.
Frame in rough opening. Use dimensions
shown in Figure 8 for the rough opening.
If installing in a corner, use dimensions
shown in Figure 9 for the rough opening. The height is 26 7/8" which is the
same as the wall opening above.
104408
3.
4.
An optional blower accessory is available (see Accessories, page 27). There
are three options for connecting blower
to electrical source.
Option one: Install fireplace near an
electrical outlet. See Blower Instructions for power cord length.
Option two: Have a licensed electrician install a properly grounded, threeprong 120-volt electrical outlet at fireplace location. Locate outlet inside the
framed enclosure. Blower power cord
will plug into this outlet.
Option three: Have a licensed electrician connect blower to electrical
source at junction box inside fireplace.
If using option one, have electrical outlet installed at this time. If using option
two, do not connect blower to electrical
source at junction box until step 7.
Install gas piping to fireplace location.
This installation includes an approved
flexible gas line (if allowed by local
codes) after the manual shutoff valve.
The flexible gas line must be the last
item installed on the gas piping.
If you have not assembled firebox, follow instructions on page 4.
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 Fireplace to
Gas Supply, page 15.
7. If the optional blower has been installed
connect blower to electrical source.
Options one and two: Route blower
electrical cord through side or rear access door of fireplace. Plug electrical
cord into electrical outlet.
Option three: Have a licensed electrician connect blower to electrical
source at junction box inside fireplace.
8. Bend four nailing flanges on outer casing with pliers (see Figure 10).
9. Attach fireplace to wall studs using
nails or wood screws through holes in
nailing flange.
10. Check all gas connections for leaks. See
Checking Gas Connections, page 16.
11. If using optional brass trim kit, install
the trim after final finishing and/or
painting of wall. See instructions included with brass trim accessory for attaching brass trim.
Nails or
Wood
Screws
Nailing
Flanges
Figure 10 - Attaching Fireplace to Wall
Studs
Continued
9
VMH10TNA
®
VENT-FREE NATURAL GAS COMPACT FIREPLACE
OPTIONAL MANTEL
INSTALLATION
INSTALLATION
Continued
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.
If your installation does not meet the above
minimum clearances, you must:
• raise the mantel to an acceptable height,
OR
• remove the mantel.
Mantel Shelf
21"
19"
16"
13"
10"
Note:
8"
All vertical
measurements 6"
are from top of
2 1/2"
fireplace
opening to
bottom of
mantel shelf. All
measurements
are in inches.
Side of
Firebox
Note: Refer to instructions provided with
the mantel for assembly instructions. Refer
to instructions below for system installation. Refer to instructions on page 4 for
firebox assembly. Blower accessory should
be installed if it is being used (see Accessories, page 27).
1. Unscrew four brass screws that attach
top louver to fireplace. Remove louver
from fireplace and set aside.
2. Place fireplace on wood base.
3. Place mantel around fireplace/base assembly.
4. Assemble brass trim kit. See Assembling Brass Trim, page 11.
5. Firmly snap brass trim kit on shoulder
screws. Shoulder screws are located on
fireplace cabinet (see Figure 12).
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 12).
8.
9.
10.
11.
12.
13.
14.
15.
16.
Place assembly next to wall at installation location.
Remove brass trim kit and mantel. Be
careful not to damage wall or mantel.
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 14).
Install gas line. See Connecting To Gas
Supply, page 14.
Check for leaks. See Checking Gas
Connections, page 16.
Place mantel around fireplace. Be careful not to damage wall or mantel.
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 12).
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 brass louvers (see
Figure 13).
Reinstall top brass louvers.
Shoulder
Screws
Hole for 3"
wood screw
for attaching
fireplace to
mantel
Figure 11 - Minimum Mantel Clearances
for Built-In Installation
Assembled
Brass Trim
Hole for 3"
wood screw
for attaching
fireplace to
wooden base
Figure 12 - Attaching Brass Trim to Fireplace
1 3/4" Screw
Wood Base
Figure 13 - Attaching Wood Base to Floor
10
104408
OWNER’S MANUAL
Continued
INSTALLING BLOWER
ACCESSORY GA3400T
Assembling Brass Trim (Brass
trim shipped with mantel)
Removing Upper Louver
Assembly
1.
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.
INSTALLATION
2.
3.
4.
5.
6.
7.
8.
Remove packaging from three remaining pieces of brass trim.
Locate two adjusting plates with set
screws, and two shims in the hardware
packet.
Align shim under adjusting plate as
shown in Figure 14.
Slide one end of adjusting plate/shim
in slot on mitered edge of top brass trim
(see Figure 14).
Slide other end of adjusting plate/shim
in slot on mitered edge of side brass
trim (see Figure 14).
While firmly holding edges of brass
trim together, tighten both set screws
on the adjusting plate with slotted
screwdriver.
Repeat steps 1 through 6 for other corner.
Set brass assembly aside for later installation.
Shim
Adjusting
Plate
Figure 14 - Assembling Brass Trim
1
Bottom Louver
Assembly
Installing Blower Assembly
Upper Louver
Assembly
Removing Valve Cover Shield
1.
2.
Slot
2
Figure 16 - Removing Valve Cover Shield
Figure 15 - Removing Upper Louver Assembly
Mitered
Edge
Side Brass
Trim
Valve
Cover
Shield
Snap
Bushings
Brass Screws
Slot
Branch
Support
Remove
Screw
Blower Bracket
Mounting Holes
Top Brass Trim
Set
Screws
Shoulder
Screw
Open bottom louver assembly by
swinging the assembly down (see Figure 16).
Using short Phillips screwdriver, remove the screw under the center of the
branch support. Rotate valve cover
shield clockwise and slide out.
IMPORTANT: Do not remove shoulder screw on the left side of valve cover
shield. Slide the valve cover shield off
of the shoulder screw (see Figure 16).
Note: If you do not have a short
Phillips screwdriver, the screen, twigs,
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.
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 13.
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
connected 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, page 12).
Continued
104408
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VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
INSTALLATION
6.
Continued
4.
5.
Carefully disconnect green and white
wires at their insulated connectors.
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 assembly to the outer
casing with 4 #10 screws provided (see
Figure 17).
Blower Bracket
Assembly
7.
8.
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).
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).
Reconnect red wire to switch position
3. Reconnect blue wire to switch position 1. Reconnect green and white wires.
Wiring Routing
Hole in Baffle
Screw
9.
Install the switch plate on the valve
cover shield with 2 #10 screws provided
(see Figure 18). 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 11). Close lower
louver door.
Baffle
Valve Cover
Shield
Wire
Harness
Switch
Switch
Plate
Screw
Power
Cord
Figure 18 - Installing Switch Plate to Valve
Cover Shield
3
2
1
Blue
Red
Switch
Plate
Valve Cover
Shield
Wire
Harness
Box Cover
Figure 17 - Installing Blower Bracket Assembly
12
104408
OWNER’S MANUAL
INSTALLATION
Continued
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 11), 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 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.
4.
5.
6.
7.
Blower Bracket
Assembly
Screw
3.
8.
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.
A licensed electrician must follow the
wiring diagram to connect incoming
electrical supply to fan kit wiring harness (see Figure 20).
Plug power cord to the outlet receptacle
(not provided) as shown in figure 19.
Wind the extra cable in power cord and
and tie it up with the plastic wire strap
(see Figure 19). Set the cable bundle
between the burner bracket and outer
casing, away from the burner.
Reinstall valve cover shield.
Test to make sure the blower is working properly.
Reinstall upper louver assembly and
hood if previously removed, (see Figure
15, page 11). Close lower louver door.
Fan Switch
(Auto/Off/On)
Auto
1
Off
2
3
On
Power
Cord
3
2
1
Red
Black
White
Green
Wire
Harness
Thermostat
Switch
(N.O.)
Blue
110/115
V.A.C.
Switch
Blue
Blower
Motor
Red
White
Green
Figure 20 - Wiring Diagram For Blower
Accessory Built-In Installation
Outlet
Receptacle
Extension Cord
Blue
Red
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.
Switch Plate
Plastic Wire
Strap
Valve
Cover
Shield
Box Cover
Clamp Connector
(not included)
Wire
Harness
Figure 19 - Installing Blower Bracket Assembly
Continued
104408
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VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
INSTALLATION
Continued
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.
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe
could result in clogged fireplace valves.
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 pressure will occur.
CAUTION: Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Installation must include a manual 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 22).
IMPORTANT: Install main gas valve
(manual shutoff valve) in an accessible
location. The main gas valve is for turning
on or shutting off the gas to the appliance.
Approved Flexible
Gas Line
We recommend that you install a sediment
trap in supply line as shown in Figure 22.
Locate sediment trap where it is within
reach for cleaning. Install in piping system
between fuel supply and heater. Locate sediment 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.
A.G.A. Design-Certified Manual
Shutoff Valve With 1/8" NPT Tap*
Figure 21 - Folding Anchor
CONNECTING TO GAS
SUPPLY
From Gas
Meter (5"
W.C. to
10.5" W.C.
Pressure)
WARNING: A qualified service person must connect fireplace to gas supply. Follow all
local codes.
3" Minimum
WARNING: Never connect
fireplace to private (non-utility)
gas wells. This gas is commonly
known as wellhead gas.
IMPORTANT: Check gas line pressure before connecting fireplace to gas line. Gas
line pressure must be no greater than 14
inches of water. If gas line pressure is higher,
fireplace regulator damage could occur.
Pipe Nipple Cap Tee Joint
Sediment Trap
Figure 22 - Gas Connection
* Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer.
See Accessories, page 27.
14
104408
OWNER’S MANUAL
INSTALLATION
Screen
Shipping
Screw
Continued
CONNECTING FIREPLACE
TO GAS SUPPLY
Branch
Support
Installation Items Needed
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 manual shutoff
valve should be accessible.
4.
5.
6.
Flexible Gas
Line
Screen
Figure 23 - Removing Log Base Assembly From Fireplace
Gas Connector
To Fireplace
Gas Regulator
➞
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not
provided)
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 support to fireplace (see Figure 23). Carefully lift up branch support and remove
from fireplace (see Figure 23).
3. Route flexible gas line (provided by
installer) from manual shutoff valve
into fireplace through side or rear access holes in outer casing. Route flexible gas supply line through fireplace
access holes in outer casing.
Shoulder
Screw
Flexible Gas Line from
Fireplace Gas Regulator
Provided With Fireplace
Manual Shutoff Valve
Flexible Gas Line from
Manual Shutoff Valve
Provided By Installer
➞
To Gas
Supply
Figure 24 - Attaching Flexible Gas Lines Together
Apply pipe joint sealant lightly to male
threads of gas connector attached to
flexible gas line (see Figure 24). Connect flexible gas line to flexible gas line
attached to gas regulator of fireplace
(see Figure 24).
Check all gas connections for leaks. See
Checking Gas Connections, page 16.
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.
Continued
104408
15
®
VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
INSTALLATION
Continued
CHECKING GAS
CONNECTIONS
WARNING: Test all gas piping and connections for leaks
after installing or servicing. Correct all leaks at once.
WARNING: Never use an open
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.
Test Pressures Equal To or Less Than
1/2 PSIG
1. Close manual shutoff valve (see Figure 25).
2. Pressurize supply piping system by either using compressed air or opening
main gas valve located on or near gas
meter.
3. Check all joints from gas meter to
manual shutoff valve (see Figure 26).
Apply mixture of liquid soap and water to gas joints. Bubbles forming show
a leak.
4. Correct all leaks at once.
Manual
Shutoff
Valve
ON
Open
POSITION
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of 1/2 PSIG
1. Disconnect fireplace and its individual
manual shutoff valve from gas supply
piping system. Pressures in excess of 1/2
psig will damage fireplace regulator.
2. Cap off open end of gas pipe where
manual shutoff valve was connected.
3. Pressurize supply piping system by either using compressed air or opening
main gas valve located on or near gas
meter.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect fireplace and manual shutoff
valve to gas supply. Check reconnected
fittings for leaks.
Pressure Testing Fireplace Gas
Connections
1.
2.
3.
4.
5.
6.
7.
8.
Open manual shutoff valve (see Figure
25).
Open main gas valve located on or near
gas meter.
Make sure control knob of fireplace is
in the OFF position.
Check all joints from manual shutoff
valve to thermostat gas valve (see Figure 26). Apply mixture of liquid soap
and water to gas joints. Bubbles forming show a leak.
Correct all leaks at once.
Light fireplace (see Operating Fireplace, pages 17 and 18). Check all other
internal joints for leaks.
Turn off fireplace (see To Turn Off Gas
to Appliance, page 18).
Replace front panel.
OFF
Closed
POSITION
Figure 25 - Manual Shutoff Valve
Manual
Shutoff
Valve
Gas Meter
Figure 26 - Checking Gas Joints
16
104408
OWNER’S MANUAL
LIGHTING
INSTRUCTIONS
OPERATING
FIREPLACE
WARNING: You must operate
this fireplace with the fireplace
screen in place. Make sure fireplace screen is installed before
running 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.
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.
NOTICE: During initial operation
of new fireplace, burning logs
will give off a paper-burning
smell. Open window to vent smell.
Operate fireplace on HI position
to burn off odor. This will only
last a few hours.
1.
2.
3.
4.
5.
STOP! Read the safety information,
column 1.
Make sure manual shutoff valve is
fully open.
Turn control knob clockwise Clockwise
to the OFF position.
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, column 1. If you don’t
smell gas, go to the next step.
Turn control knob counterclockwise
C-clockwise to the PILOT position. Press
in control knob for five (5) seconds
(see Figure 27).
Ignitor Button
Control Knob
6.
7.
8.
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. 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.
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 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.
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.
Turn control knob counterclockwise
C-clockwise 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
manual shutoff valve.
Ignitor Electrode
Thermocouple
Pilot Burner
Figure 27 - Control Knob In The OFF
Position
Figure 28 - Pilot
Continued
104408
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VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
MANUAL LIGHTING
PROCEDURE
OPERATING
FIREPLACE
1.
Continued
2.
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Fireplace
1.
2.
3.
Turn control knob clockwise
to the OFF position.
Turn off all electric power to the appliance if service is to be performed.
OPERATING BLOWER
Shutting Off Burner Only (pilot
stays lit)
Turn control knob clockwise
the PILOT position.
Follow steps 1 through 5 under Lighting Instructions, page 17.
With control knob pressed in, strike
match. Hold match to pilot until pilot lights.
Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob. Now
follow step 8, page 17.
to
Thermostat Control Operation
The thermostat used on this fireplace
senses the room temperature. 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.
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.
Auto/Off/On Switch
Figure 29 - Auto/Off/On Switch
18
104408
OWNER’S MANUAL
BURNER FLAME PATTERN
INSPECTING
BURNER
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 30 shows a correct pilot flame pattern.
Figure 31 shows an incorrect pilot flame
pattern. The incorrect pilot flame is not touching the thermocouple. This will cause the
thermocouple to cool. When the thermocouple cools, the fireplace will shut down.
Figure 32 shows a correct burner flame
pattern. Figure 33 shows an incorrect burner
flame pattern. The incorrect burner flame
pattern shows the flame consistently higher
than one inch above the log.
If burner flame pattern is incorrect, as shown
in Figure 33
• 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 31
• turn fireplace off (see To Turn Off Gas to
Appliance, page 18)
• see Troubleshooting, pages 20 through 22
Thermocouple
Pilot Burner
Figure 32 - Correct Burner Flame Pattern
Top of Flame Consistently About
One Inch Higher Than Logs
Figure 30 - Correct Pilot Flame Pattern
Thermocouple
Figure 33 - Incorrect Burner Flame Pattern
Pilot Burner
Figure 31 - Incorrect Pilot Flame Pattern
104408
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®
VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
TROUBLESHOOTING
Note: For additional help, visit DESA
International’s technical service web site
at www.desatech.com.
WARNING: Turn off and unplug fireplace and let cool before
servicing. Only a qualified service person should service and
repair fireplace.
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot. This can damage ODS/
pilot unit.
Note: All troubleshooting items are listed in
order of operation.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
When ignitor button is pressed, there is no
spark at ODS/pilot
1. Ignitor cable pinched or wet
1. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
2. Reconnect ignitor cable
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
When ignitor button is pressed, there is
spark at ODS/pilot but no ignition
1. Gas supply turned off or manual 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. ODS/pilot is clogged
6. Gas regulator setting is not correct
ODS/pilot lights but flame goes out when
control knob is released
1. Control knob not fully pressed in
2. Control knob not pressed in long enough
3. Safety interlock system has been triggered
4. Manual 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
3.
4.
5.
6.
Replace ignitor cable
Replace piezo ignitor
Replace ignitor
Replace ignitor
1. Turn on gas supply or open manual
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. Clean ODS/pilot (see Cleaning and
Maintenance, page 23) or replace ODS/
pilot assembly
6. Replace gas regulator
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 manual shut-off valve
5. Hand tighten until snug, then tighten 1/4
turn more
6. A) Contact local natural gas company
B) Clean ODS/pilot (see Cleaning and
Maintenance, page 23) or replace ODS/
pilot assembly
7. Replace thermocouple
8. Replace control valve
www.desatech.com
20
104408
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 Maintenance, page 23) or replace burner orifice
2. Replace burner orifice
3. Contact local natural gas company
2. Burner orifice diameter is too small
3. Inlet gas pressure is too low
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 Maintenance, page 23) or replace burner orifice
Burner backfiring during combustion
1. Burner orifice is clogged or damaged
1. Clean burner (see Cleaning and Maintenance, page 23) or replace burner orifice
2. Replace burner pressure
3. Contact local natural gas company
4. Replace gas regulator
2. Burner damaged
3. Low inlet gas pressure
4. Gas regulator defective
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
burner is lit
1. Air in gas line
1. Operate burner until air is removed from
line. Have gas line checked by local
natural gas company
2. Observe minimum installation clearances
(see pages 8 through 10)
3. Clean burner (see Cleaning and Maintenance, page 23) or replace burner orifice
2. Air passageways on fireplace blocked
3. Dirty or partially clogged burner orifice
White powder residue forming within burner
box or on adjacent walls or furniture
1. When heated, vapors from furniture polish, wax, carpet cleaners, etc. turn into
white powder residue
www.desatech.com
104408
21
1. Turn heater off when using furniture
polish, wax, carpet cleaners, or similar
products
Continued
®
VMH10TNA
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.
• 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: Operating fireplace where impurities in air exist may create odors. Cleaning
supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles,
etc., create fumes. These fumes may mix with combustion air and create odors.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Fireplace produces a clicking/ticking noise
just after burner is lit or shut off
1. Metal expanding while heating or contracting while cooling
1. This is common with most fireplaces. If
noise is excessive, contact qualified service person
Fireplace produces unwanted odors
1. Fireplace burning vapors from paint, hair
spray, glues, etc. (See IMPORTANT
statement above)
2. Gas leak. See Warning statement at
top of page
1. Ventilate room. Stop using odor causing products while fireplace is running
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
position
1. Gas leak. See Warning statement at
top of page
2. Control valve defective
1. Locate and correct all leaks (see Checking Gas Connections, page 16)
2. Replace control valve
Gas odor during combustion
1. Foreign matter between control valve
and burner
2. Gas leak. See Warning statement at
top of page
1. Take apart gas tubing and remove foreign
matter
2. Locate and correct all leaks (see Checking Gas Connections, page 16)
Moisture/condensation noticed on windows
1. Not enough combustion/ventilation air
1. Refer to Air for Combustion and Ventilation requirements (page 5)
2. Locate and correct all leaks (see Checking Gas Connections, page 16)
www.desatech.com
22
104408
OWNER’S MANUAL
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.
CLEANING 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, and lint. Clean these
air inlet holes prior to each heating season.
Blocked air holes will create soot. We recommend that you clean the unit every 2,500
hours of operation or every three months.
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 34).
3. Blow air through the ports/slots and
holes in the burner.
4.
5.
6.
Check the injector holder located at the
end of the burner tube again. Remove
any large particles of dust, dirt, lint, or
pet hairs with a soft cloth or vacuum
cleaner nozzle.
Blow air into the primary air holes on
the injector holder.
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 35). 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.
Injector Holder
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• fireplace will not produce specified heat
When Gas Quality Is Bad
• pilot will not stay lit
• burner will produce flames and soot
• fireplace will backfire when lit
You may feel your gas pressure is too low or
gas quality is bad. If so, contact your local
natural gas supplier.
TECHNICAL
SERVICE
You may have further questions about installation, operation, or troubleshooting.
If so, contact DESA International’s Technical Service Department at 1-800-323-5190.
Ports/Slots
You can also visit DESA International’s
technical services web site at
www.desatech.com.
Burner
Tube
Primary Air Inlet
Holes
Figure 34 - Injector Holder On Outlet
Burner Tube
Pilot Air Inlet
Hole
Pilot Assembly
Figure 35 - Pilot Inlet Air Hole
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.
104408
SERVICE HINTS
23
VMH10TNA
®
VENT-FREE NATURAL GAS COMPACT FIREPLACE
ILLUSTRATED
PARTS
BREAKDOWN
VMH10TNA
3
1
17
9
29
7
44
4
43
10
43
8
3
3
11
4
2
32
4
14
20
23
28
42
24
25
12-1
43
13
36
38
33
31
14
34
19
39
37
41
5
25
12-1
12-2
12
24
15
38
6
18
35
26 27
22
21
16
40
30
24
104408
OWNER’S MANUAL
PARTS LIST
VMH10TNA
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.
KEY
NO.
VMH10TNA
PART NO.
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
12-1
12-2
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
43
44
102633-02CK
102624-02
099230-02
098304-01
103591-01
103209-03
102635-02CK
104058-01
103209-01
101712-04
102638-01
103042-01
098514-01
098594-01
102460-01CJ
099211-01
103963-01
103671-01
100587-01
098303-02
104335-01CK
102649-02CJ
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
104078-01
104313-01
104313-02
M10908-2
103734-01
101006-01
097809-03
098249-01
101629-02
M11084-26
102458-01CK
Outer Casing Top
Outer Casing
Shoulder Screw
Screw, #10 x 3/8"
Burner
Louvered Door
Left and Right Side Front
Branch
Brass Top Louver
Firebox Hood
Firebox Top
ODS/Pilot Assembly
Thermocouple
Ignitor Electrode
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
Main Log
Hinge Pin (Right)
Hinge Pin (Left)
Hinge Screws
Burner Support
Pilot Bracket
3/8" NPT x 3/8" Flare Brass Fitting
Nut, M5
Bushing
Hex Head Screw, #10 x 3/8"
Middle Rail
QTY.
1
1
14
12
1
1
2
1
1
1
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
31
1
PARTS AVAILABLE — NOT SHOWN
101054-01
100563-01
103470-01
104319-02
104408
25
Lighting Instructions Plate
Warning Plate
Hardware Package
Video, Instruction
1
1
1
1
®
VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
SPECIFICATIONS
Input Rate
Type Gas
Ignition
Pressure Regulator Setting
Inlet Gas Pressure (in. of water)*
Maximum
Minimum
Dimensions, Inches (H x W x D)
Fireplace (including hood and screws)
Carton
Weight, pounds
Fireplace
Shipping
* For purposes of input adjustment
10,000 Btu/Hr
Natural Only
Piezo
3" W.C.
10.5"
5"
25 7/8 x 26 13/16 x 9 3/8
32 5/8 x 27 3/16 x 11 5/8
44 1/2 lbs.
48 lbs.
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 International’s Technical
Service Department at 1-800-323-5190 for
referral information.
When calling DESA International, 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 defective 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 Department at 1-800-972-7879 for referral information.
When calling DESA International, have ready
• model number of your fireplace
• the replacement part number
26
104408
OWNER’S MANUAL
CABINET MANTEL WITH
BUILT-IN HEARTH BASE AND
ROUNDED LEG STYLING
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 address listed on the back page of this manual.
Unfinished - GM921U
Finished - GM920F
For use with fireplace. A hardwood mantel
and hearth base offers compact styling and
completes the fireplace look. Available in a
walnut finished or an unfinished hardwood,
ready to stain or paint. Complete assembly
instructions included. Three-sided brass trim
kit included.
MANUAL SHUTOFF VALVE
GA5010
Manual shutoff valve with 1/8" NPT tap.
CABINET MANTEL WITH
BUILT-IN HEARTH BASE
AND TRADITIONAL SQUARE
LEG STYLING
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. Complete assembly instructions included. Threesided brass trim kit included.
BRASS TRIM KIT - GA6095
Optional four-sided brass trim kit for recessed
built-in installations (when unit is raised off of
the floor. Provides a finished appearance by
covering rough edges of wall opening.
BRASS TRIM KIT - GA6094
Optional three-sided brass 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.
CORNER MANTEL WITH
BUILT-IN HEARTH BASE
Unfinished - GM721U
Finished - GM720F
For use with fireplace. Space-saving mantel
and hearth base corner design features clean,
classic lines. Available in a walnut finish or
an unfinished hardwood, ready to stain or
paint. Complete assembly instructions included. Three-sided brass trim kit included.
THERMOSTATICALLY CONTROLLED BLOWER KIT
GA3400T
Provides better heat distribution. Makes fireplace more efficient. Automatically turns
off and on as needed.
104408
27
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
fireplace to proper operating condition and an allowance for labor when provided by a DESA Authorized Service Center. 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.
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 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
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:
INTERNATIONAL
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
104408 01
NOT A UPC
104408-01
REV. D
01/00