Vanguard VMH26TNC Installation manual

®
VENT-FREE COMPACT FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
Shown with Optional Cabinet Mantel/Hearth Base Accessory
Models VMH26TPC and VMH26TNC
14,000 to 26,000 Btu/Hr with Thermostat
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
— Do not store or use gasoline or other ­flammable
vapors and liquids in the ­vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
— Installation and service must be performed by a qualified installer, service agency, or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
For more information, visit www.desatech.com
Table of Contents
Safety................................................................... 2
Local Codes......................................................... 4
Product Identification............................................ 4
Product Features.................................................. 5
Unpacking............................................................ 5
Assembly.............................................................. 5
Air for Combustion and Ventilation....................... 6
Installation............................................................ 9
Operation............................................................ 19
Inspecting Burner............................................... 22
Cleaning and Maintenance................................. 23
Troubleshooting.................................................. 24
Specifications..................................................... 28
Service Hints...................................................... 28
Technical Service............................................... 28
Replacement Parts............................................. 28
Accessories........................................................ 29
Parts................................................................... 30
Warranty...............................................Back Cover
Safety
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 6 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
2
WARNING: This product contains and/or generates chemicals
known to the state of California
to cause cancer or birth defects,
or other reproductive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate,
or service this fireplace. Improper
use of this fireplace can cause serious injury or death from burns, fire,
explosion, electrical shock, and
carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs
of 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 and Propane/LP Gas: Natural and
propane/LP gases are odorless. An odor-making agent is added to these gases. The odor
helps you detect a gas leak. However, the
odor added to the gas can fade. Gas may be
present even though no odor exists.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this fireplace.
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113111-01H
SAFETY
Continued
WARNING: Any change to
this heater or its controls can
be dangerous.
WARNING: Do not allow fans
to blow directly into the fireplace.
Avoid any drafts that alter burner
flame patterns. Ceiling fans can
create drafts that alter burner
flame patterns. Altered burner
patterns can cause sooting.
WARNING: Do not use a blower insert, heat exchanger insert,
or other accessory not approved
for use with this fireplace.
Due to high temperatures, the
appliance should be located out
of traffic and away from furniture
and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects in the fireplace.
Fireplace front and screen become very hot when running fireplace. Keep children and adults
away from hot surfaces to avoid
burns or clothing ignition. Fireplace will remain hot for a time
after shutdown. Allow surfaces
to cool before touching.
Carefully supervise young children when they are in the room
with fireplace.
You must operate this fireplace
with the fireplace screen and
hood in place. Make sure fireplace screen is in place before
running fireplace.
113111-01H
Keep the appliance area clear
and free from combustible materials, gasoline, and other flammable vapors and liquids.
1. This appliance is only for use with type of
gas indicated on rating plate. This appliance is not convertible for use with other
gases.
2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors (propane/LP
only).
3. If you smell gas
•shut off gas supply
•do not try to light any appliance
•do not touch any electrical switch; do not
use any phone in your building
•immediately call your gas supplier from
a neighbor’s phone. Follow the gas
supplier’s instructions
•if you cannot reach your gas supplier,
call the fire department
4. This fireplace shall not be installed in a
bedroom or bathroom.
5. Do not use this fireplace as a wood-burning fireplace. Use only the logs provided
with the fireplace.
6. Do not add extra logs or ornaments such
as pine cones, vermiculite, or rock wool.
Using these added items can cause sooting. Do not add lava rock around base.
Rock and debris could fall into the control
area of fireplace.
7. This fireplace is designed to be smokeless. If logs ever appear to smoke, turn
off fireplace and call a qualified service
person.
Note: During initial operation, slight smoking could occur due to log curing and fireplace burning manufacturing residues.
8. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 23.
9. Before using furniture polish, wax, carpet
cleaner, or similar products, turn heater
off. If heated, the vapors from these products may create a white powder residue
within burner box or on adjacent walls or
furniture.
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3
SAFETY
Continued
10.This fireplace needs fresh air ventilation to
run properly. This fireplace has an Oxygen
Depletion Sensing (ODS) safety shutoff
system. The ODS shuts down the fireplace if not enough fresh air is available.
See Air for Combustion and Ventilation,
page 6. If fireplace keeps shutting off, see
Troubleshooting, page 24.
11.Do not run fireplace
•where flammable liquids or vapors are
used or stored.
•under dusty conditions.
12.Do not use this fireplace to cook food or
burn paper or other objects.
13.Do not use fireplace if any part has been
under water. Immediately call a qualified
service technician to inspect the room
fireplace and to replace any part of the
control system and any gas control which
has been under water.
14.Turn off and unplug fireplace and let
cool before servicing. Only a qualified
service person should service and repair
fireplace.
15.Operating fireplace above elevations of
4,500 feet could cause pilot outage.
16.Do not operate fireplace if any log is
broken. Do not operate fireplace if a log
is chipped (dime-sized or larger).
17.To prevent performance problems, do not
use propane/LP fuel tank of less than 100
lbs. capacity (propane/LP only).
18.Provide adequate clearances around air
openings.
Local Codes
Product
Identification
Install and use fireplace with care. Follow all
local codes. In the absence of local codes,
use the latest edition of The National Fuel
Gas Code, ANSI Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
State of Massachusetts: The installation
must be made by a licensed plumber or
gas fitter in the Commonwealth of Massachusetts.
Sellers of unvented propane or natural
gas-fired supplemental room heaters shall
provide to each purchaser a copy of 527
CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for
bedroom and bathroom installation in the
Commonwealth of Massachusetts.
4
Fireplace
Cabinet
Screen
Logs
Control Knob
Ignitor Button
Figure 1 - Vent-Free Gas Compact
Fireplace
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113111-01H
Product Features
Safety Pilot
Thermostatic Heat Control
This fireplace has a pilot with an Oxygen
Depletion Sensing (ODS) safety shutoff
system. The ODS/pilot is a required feature
for vent-free room fireplaces. The ODS/pilot
shuts off the fireplace if there is not enough
fresh air.
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.
Piezo Ignition System
This fireplace has a piezo ignitor. This system requires no matches, batteries, or other
sources to light fireplace.
Unpacking
1. Remove fireplace and hood from carton.
Log is wrapped and inside fireplace. Do
not remove at this time.
2. Remove all protective packaging applied
to fireplace for shipment.
3. Make sure your fireplace includes one
hardware packet.
4. Check fireplace for any shipping damage. If
heater is damaged call DESA Heating, LLC
at 1-866-672-6040 for replacement parts
before returning to dealer.
Assembly
WARNING: Always have
branch support and screen in
place before operating fireplace.
This prevents excessive temperatures on fireplace surfaces.
WARNING: Failure to position
the parts in accordance with these
diagrams or failure to use only
parts specifically approved with
this fireplace may result in property damage or personal injury.
4. Remove log packaging material and
discard packaging. Gently place log set
on burner support (see Figure 2). The log
should fit flat against top of burner support and log locator tabs fit into the slots
under the log. Do not allow log to contact
flame. If flame contacts log, soot will be
created.
5. Reattach screen by placing the notches
in the screen frame over the shoulder
screws and pushing down.
Shoulder
Screw
Log
Burner Support
with Log
Locator Tabs
Assembling Fireplace
Tools Required:
• Phillips screwdriver
• 5/16" hex wrench
• slotted screwdriver
Installing Log
1. Lift screen up and pull out to remove.
2. Cut two plastic straps to remove the log
from the firebox cavity.
3. An optional blower is available. See Accessories, page 29. Install optional blower
now. Follow installation instructions provided with blower.
113111-01H
Screen
Branch
Support
Figure 2 - Assembling Fireplace
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5
Assembly
Continued
Assembling Hood
1. Locate four black phillips sheet metal
screws from the hardware packet.
2. Rotate hood as shown in Figure 3. Make
sure hood tabs point toward fireplace.
3. Insert hood tabs between baffle and louvers (see Figure 3).
4. Gently rotate hood to upright position.
Make sure hood tabs are behind louvers
and hood is resting on firebox top (see
Figure 3).
5. Align screw holes on hood with screw
holes on firebox top.
6. Insert screws as shown in Figure 3.
Tighten screws firmly.
Louver
Hood Tabs
Hood
Hood Tab
Baffle
Sheet Metal
Screw
Firebox Top
Figure 3 - Assembling Hood
Air for Combustion and Ventilation
WARNING: This heater shall
not be installed in a room or
space unless the required volume of indoor combustion air
is provided by the method described in the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, the
International Fuel Gas Code, or
applicable local codes. 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
6
air for these appliances. This will insure proper
venting of vented fuel-burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/ NFPA 54, Air for
Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 6 through 8 will help
you classify your space and provide adequate
ventilation.
Unusually Tight Construction
The air that leaks around doors and windows
may provide enough fresh air for combustion
and ventilation. However, in buildings of unusually tight construction, you must provide
additional fresh air.
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
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113111-01H
AIR FOR COMBUSTION AND VENTILATION
Continued
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.
If your home meets all of the three criteria
above, you must provide additional fresh air.
See Ventilation Air From Outdoors, page 8.
If your home does not meet all of the three
criteria above, proceed to Determining
Fresh-Air Flow For Fireplace Location.
Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1.3/
NFPA 54 defines a confined space as a space
whose volume is less than 50 cubic feet per
1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed
in that space and an unconfined space as a
space whose volume is not less than 50 cubic
feet per 1,000 Btu per hour (4.8 m3 per kw)
of the aggregate input rating of all appliances
installed in that space. Rooms communicating
directly with the space in which the appliances
are installed*, through openings not furnished
with doors, are considered a part of the unconfined space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
DETERMINING FRESH-AIR FLOW
FOR FIREPLACE LOCATION
Determining if You Have a Confined or
Unconfined Space
Use this work sheet to determine if you have
a confined or unconfined space.
Space: Includes the room in which you will install
fireplace plus any adjoining rooms with doorless passageways or ventilation grills between
the rooms.
1. Determine the volume of the space (length
x width x height).
Length x Width x Height =__________cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2560 cu. ft.
(volume of space)
If additional ventilation to adjoining room
is supplied with grills or openings, add the
volume of these rooms to the total volume
of the space.
113111-01H
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
_ ________ (volume of space) x 20 = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) x 20
= 51,200 (maximum Btu/Hr the space can
support)
3. Add the Btu/Hr of all fuel burning appliances
in the space.
Vent-free fireplace
___________ Btu/Hr
Gas water heater*
___________ Btu/Hr
Gas furnace
___________ Btu/Hr
Vented gas heater
___________ Btu/Hr
Gas fireplace logs
___________ Btu/Hr
Other gas appliances*+__________ Btu/Hr
Total
=__________ Btu/Hr
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
30,000 Btu/Hr
Gas water heater
___________
26,000 Btu/Hr
Vent-free fireplace
+__________
56,000 Btu/Hr
Total
=__________
4. Compare the maximum Btu/Hr the space
can support with the actual amount of Btu/
Hr used.
_ _______ Btu/Hr (maximum the space can
support)
_ _______ Btu/Hr (actual amount of Btu/Hr
used)
Example: 51,200 Btu/Hr (maximum the
space can support)
56,000 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 8.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors, page 8.
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.
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7
AIR FOR COMBUSTION AND VENTILATION
Continued
WARNING: If the area in which
the heater may be operated does
not meet the required volume for
indoor combustion air, combustion and ventilation air shall be
provided by one of the methods
described in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54,
the International Fuel Gas Code,
or applicable local codes.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must provide
two permanent openings: one within 12" of the
ceiling and one within 12" of the floor on the
wall connecting the two spaces (see options
1 and 2, Figure 4). You can also remove door
into adjoining room (see option 3, Figure 4).
Follow the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two permanent openings: one within 12" of the ceiling
and one within 12" of the floor. Connect these
items directly to the outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation for required size
of ventilation grills or ducts.
IMPORTANT: Do not provide openings for
inlet or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering
the attic will activate the power vent.
Outlet
Air
Outlet
Air
Ventilated
Attic
To Attic
To
Crawl
Space
Inlet
Air
Inlet Air
Ventilated
Crawl Space
Figure 5 - Ventilation Air from Outdoors
Shown with Optional Mantel
12"
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
8
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113111-01H
Installation
NOTICE: This heater is intended
for use as supplemental heat.
Use this heater along with your
primary heating system. Do not
install this heater as your primary heat source. If you have a
central heating system, you may
run system’s circulating blower
while using heater. This will help
circulate the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
WARNING: A qualified service person must install fireplace. Follow all local codes.
WARNING: Never install the
fireplace
• in a bedroom or a bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36" from
the front, top, or sides of the
fireplace
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
CAUTION: This fireplace creates warm air currents. These
currents move heat to wall surfaces next to fireplace. Installing
fireplace next to vinyl or cloth
wall coverings or operating
fireplace where impurities (such
as, but not limited to, tobacco
smoke, aromatic candles, cleaning fluids, oil or kerosene lamps,
etc.) in the air exist, may discolor
walls or cause odors.
113111-01H
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, page 6.
Note: Your Vanguard fireplace is designed to
be used in zero clearance installations. Wall
or framing material can be placed directly
against any exterior surface of your fireplace,
except where standoff spacers are integrally
attached. If standoff spacers are attached to
your fireplace, these spacers can be placed
directly against wall or framing materials.
Use the dimensions shown for rough openings
to create the easiest installation (see Built-In
Fireplace Installation, page 10).
CHECK GAS TYPE
Use only the correct type of gas (natural or
propane/LP). If your gas supply is not the
correct gas type, do not install heater. Call
dealer where you bought heater for proper
type heater.
WARNING: This appliance is
equipped for either natural gas
or propane/LP gas but not both.
Gas type is indicated on the rating plate. Field conversion is not
permitted.
INSTALLATION ITEMS
Before installing fireplace, make sure you
have the items listed below.
• external regulator - propane/LP only (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection*
• ground joint union
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certified equipment shutoff
valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase
the optional CSA design-certified equipment
shutoff valve from your dealer.
Note: If desired, purchase a four-sided trim
kit for built-in installations. See Accessories,
page 29.
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9
INSTALLation
Continued
LOCATING FIREPLACE
WARNING: Maintain the
minimum clearances shown
in Figures 6 and 7. If you can,
provide greater clearances from
floor, ceiling, and joining wall.
You can recess firebox into the wall. You can
also position fireplace in the optional cabinet
or corner mantels. IMPORTANT: Only use
optional cabinet or corner mantels specified in this manual. Purchase the optional
mantel from your dealer (see Accessories,
page 29).
CEILING
36"
Minimum
6"
Minimum
From
Sides Of
Fireplace
Right 0” Minimum
Side To Top
Surface Of
Carpeting,
Tile Or Other
Combustible
Material
FLOOR
Figure 6 - Mounting Clearances As
Viewed From Front of Fireplace Shown
Built-In the Wall
CEILING
Left
Side
CAUTION: If you install the
fireplace in a home garage
• fireplace pilot and burner must
be at least 18" 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 29). If planning to use blower, locate fireplace near an
electrical outlet.
Built-In Fireplace
Installation
Left
Side
Top Of
Mantel Can
Be Flush
With Wall
Note: When installing fireplace directly on
carpeting, tile or other combustible material,
other than wood flooring, the fireplace shall be
installed on a metal or wood panel extending
the full width and depth of the fireplace.
Built-in installation of this fireplace involves
installing fireplace into a framed-in enclosure.
This makes the front of fireplace flush with
wall. An optional trim kit accessory is available
(see Accessories, page 29). Trim will extend
past sides of fireplace approximately 1/2".
This will cover the rough edges of the wall
opening. If installing a built-in mantel above
the fireplace you must follow the clearances
shown in Figure 11, page 12. Follow the
instructions below to install the fireplace in
this manner.
36"
Minimum
Height
Front Width
Depth
Bottom
Right
Side
0" Minimum
To Top
Surface Of
Carpeting,
Tile Or Other
Combustible
Material
Actual Framing
26"
26 7/8"
26 3/4" 26 7/8"
9 1/2"
10 1/2"
3/4"
3/4"
1. Frame in rough opening. Use dimensions
shown in Figure 8, page 11, for the rough
opening.
If installing in a corner, use dimensions
shown in Figure 9, page 11, for the rough
opening. The height is 26 7/8" which is the
same as the wall opening above.
Figure 7 - Mounting Clearances As
Viewed From Front of Fireplace Shown
with Optional Mantel
10
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113111-01H
INSTALLation
Continued
WARNING: If pre-wiring, do
not connect wiring to any electrical source at this time.
Install fireplace electrical outlet
and connect wiring to outlet
before connecting to electrical
source. The fireplace electrical outlet is included with the
GA3450T blower accessory.
Only use the fireplace electrical outlet supplied with the
GA3450TA blower accessory.
2. If installing GA3450TA blower accessory,
do so at this time. See Installing Blower
Accessory GA3450TA, page 13.
Note: If not installing blower accessory,
you may wish to run electrical wiring to
your fireplace for future blower installation (see Accessories, page 29) Use only
approved three-wire electrical wiring.
Note: A qualified installer should make all
electrical connections.
3. Install gas piping to fireplace location. This
installation includes an approved flexible
gas line (if allowed by local codes) after
the equipment shutoff valve. The flexible
gas line must be the last item installed on
the gas piping.
4. If you have not assembled firebox, follow
instructions on page 4.
5. Carefully set fireplace in front of rough
opening with back of fireplace inside wall
opening.
6. Attach flexible gas line to fireplace gas
regulator. See Connecting to Gas Supply,
page 16.
7. Bend four nailing flanges on outer casing
with pliers (see Figure 10).
8. Attach fireplace to wall studs using nails
or wood screws through holes in nailing
flange.
9. Check all gas connections for leaks. See
Checking Gas Connections, page 18.
10.If using optional trim kit, install the trim
after final finishing and/or painting of wall.
See instructions included with trim accessory for attaching trim.
113111-01H
IMPORTANT: When finishing your firebox,
combustible materials
WARNING: Do not allow any
combustible/noncombustible
materials to overlap the firebox
front facing.
WARNING: Do not allow
noncombustible materials to
cover any necessary openings
like louvered slots.
10 1/2"
267/8"
267/8"
3/4" Off
The Floor
Minimum
Figure 8 - Rough Opening for Installing
in Wall
365/8"
257/8"
267/8"
513/4"
Figure 9 - Rough Opening for Installing
in Corner
Nails or
Wood
Screws
Nailing
Flanges
Figure 10 - Attaching Fireplace to Wall
Studs
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11
INSTALLation
Continued
WARNING: Never modify or
cover the louvered slots on the
front of the firebox.
Mantel Clearances for Built-In
Installation
If placing mantel above built-in fireplace, you
must meet minimum clearance between mantel shelf and top of fireplace opening.
NOTICE: Surface temperatures
of adjacent walls and mantels become hot during operation. Walls
and mantels above the firebox
may become hot to the touch.
If installed properly, these temperatures meet the requirement
of the national product standard.
Follow all minimum clearances
shown in this manual.
NOTICE: If your installation does
not meet the minimum clearances shown in Figure 11, you
must do one of the following:
• raise the mantel to an acceptable height
• remove the mantel
16"
19"
13"
Refer to instructions provided with the mantel
for assembly instructions. Refer to the following instructions for system installation. Refer
to instructions on page 6 for hood assembly.
Blower accessory should be installed prior
to mantel if it is being used (see Installing
Optional Blower Accessory GA3450TA,
page 13).
1. Assemble cabinet mantel as shown in
accessory instruction sheet.
2. If blower is installed, install a properly
grounded, 120 volt three-prong electrical
outlet at fireplace location if an outlet is not
there. If possible, locate outlet so cabinet
mantel will cover it when installed (see
Figure 12).
3. Place hearth base against wall at installation location. Cut an access hole in hearth
base to run gas line to fireplace (see Figure
12). Make sure to locate access hole so
cabinet mantel will cover it when installed.
Note: You can secure base to floor using
wood screws. Countersink screw heads
and putty over.
4. Route flexible gas line through access
hole in hearth base.
5. Center cabinet mantel on hearth base (see
Figure 13, page 13). Make sure mantel is
flush against wall and centered left to right
on base.
6. Use screws provided with mantel accessory
to attach mantel assembly to base (see
mantel instruction sheet).
7. Attach flexible gas line to fireplace gas
regulator. See Connecting to Gas Supply,
page 16.
8. Route electrical cord(s) through access
holes in either side of fireplace with bushing.
Plug electrical cord(s) into electrical outlet.
21"
Mantel Shelf
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.
OPTIONAL MANTEL Installation
Hearth
Base
Pipe and Gas
Shutoff Valve
Electrical
Outlet
Side of
Firebox
Figure 11 - Minimum Mantel Clearances
for Built-In Installation
12
Figure 12 - Placing Hearth Base Against Wall
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113111-01H
INSTALLation
Continued
9. Check all gas connections for leaks. See
Checking Gas Connections, page 18.
10.Carefully insert fireplace into cabinet
mantel (see Figure 13). Be careful not to
scratch or damage hearth base or cabinet
mantel.
11.Place metal trim on shoulder screws located on the side and top of the fireplace (see
Assembling Perimeter Trim). Firmly snap
trim over shoulder screws. Align fireplace
in mantel assembly so the trim overlaps
mantel evenly on all three sides.
12.Lower bottom louver door. Use 3" wood
screws provided with mantel accessory
to attach fireplace to base (see mantel
instruction sheet).
4. Slide one end of adjusting plate/shim
in slot on mitered edge of top trim (see
Figure 14).
5. Slide other end of adjusting plate/shim
in slot on mitered edge of side trim (see
Figure 14).
6. While firmly holding edges of trim together,
tighten both set screws on the adjusting
plate with slotted screwdriver.
7. Repeat steps 1 through 6 for other corner.
8. Set trim assembly aside for later
installation.
installing blower accessory
GA3450TA
Removing Upper Louver Assembly
To install the blower accessory, you must first
remove the upper louver assembly.
1. Lift screen off heater.
2. Remove 4 screws from louver assembly
(see Figure 15). Save these screws.
3. Pull louver assembly straight out from the
cabinet. Be careful not to scratch the paint.
Set louver assembly and screws aside.
Blower Bracket
Mounting Holes
Figure 13 - Installing Fireplace into
Mantel Assembly
Assembling Perimeter Trim
1. Remove packaging from three remaining
pieces of trim.
2. Locate two adjusting plates with set
screws, and two shims in the hardware
packet.
3. Align shim under adjusting plate as shown
in Figure 14.
Slot
Set Screws
Top Trim
Mitered Edge
Adjusting
Plate
Shim
Side
Trim
Slot
Figure 14 - Assembling Perimeter Trim
113111-01H
Black
Screws
Upper Louver
Assembly
Figure 15 - Removing Upper Louver
Assembly
Removing Valve Cover Shield
1. Open bottom louver assembly by swinging the assembly down (see Figure 16,
page 14).
2. Using short Phillips screwdriver, remove
the screw under the center of the branch
support. Rotate valve cover shield clockwise and slide out.
IMPORTANT: 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, page 14).
www.desatech.com
13
INSTALLation
Continued
Note: If you do not have a short Phillips
screwdriver, the screen, log set, and
branch support must be removed so a
longer screwdriver may be used. See
Connecting Equipment Shutoff Valve to
Heater Control, page 17, steps 1 and 2.
Branch Support
Shoulder
Screw
Valve
Remove Cover
Shield
Screw
2
1
Bottom Louver
Assembly
Figure 16 - Removing Valve Cover Shield
Snap Bushings
Installing Blower Assembly
CAUTION: Label all wires
prior to disconnection when
servicing controls. Wiring errors
can cause improper and dangerous operation.
CAUTION: Verify proper operation after servicing.
Note: If you are using a mantel with your
heater, use the following instructions. If your
heater is built-in, see For Built-In Installation
on page 15.
1. Install snap bushings found in hardware kit
into both holes in rear of valve cover shield.
2. Make sure the wire harness is firmly
connected to the terminals on the blower
bracket assembly.
3. Note wire locations on back of AUTO/OFF/
ON switch. 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).
14
4. Carefully disconnect green and white
wires at their insulated connectors.
5. In top of heater cabinet, locate 4 mounting
holes on outer casing. Align these 4 holes
with those on blower bracket assembly.
Attach blower bracket assembly to outer
casing with 4 #10 screws provided (see
Figure 17).
6. Route wire harness through hole in left
side of baffle. Pull wire harness through
lower opening above where valve shield
was removed (see Figure 17).
7. Insert 4 wire harnesses into one of the
round holes in rear of valve cover shield
and through rectangular hole in front of
shield (see Figure 17).
8. Reconnect red wire to switch position 3.
Reconnect blue wire to switch position 1.
Reconnect green and white wires.
9. Install switch plate on valve cover shield
with 2 #10 screws provided (see Figure
18, page 15). Reinstall valve cover
shield. Route power cord out of cabinet
by inserting it through bushing on outer
casing (see Figure 17). Plug fan kit into
120-Volt grounded power supply and test
operation.
Blower Bracket
Assembly
Wire
Harness
Screw
Wiring Routing
Hole in Baffle
Baffle
Switch
Power
Cord
3
2
1
Red
Switch
Plate
Blue
Wire
Valve Cover Box Cover
Harness
Shield
Figure 17 - Installing Blower Bracket
Assembly
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113111-01H
INSTALLation
Continued
113111-01H
Blower
Motor
3
Red
White
Green
2
Black
White
Green
Off
110/115
V.A.C.
Follow instructions for Removing Valve
Cover Shield, page 13. Continue installation
as follows:
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, page 14. Also remove
black wire from middle switch terminal 2.
3. Remove black plastic strain relief and power
cord from switch plate. The power cord
supplied will not be used in built-in installations. Pop in the plastic snap bushing found
in hardware kit into the hole left by supply
cord/strain relief.
Fan Switch
(Auto/Off/On)
Auto
1
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.
Blue
For Built-In Installation
Blue
Switch
Screw
Plate
Figure 18 - Installing Switch Plate to
Valve Cover Shield
Red
Valve Cover
Shield
4. A licensed electrician must follow the wiring diagram to connect incoming electrical supply to fan kit wiring harness (see
Figure 19).
5. Plug power cord to the outlet receptacle
(not provided) as shown in Figure 18.
Wind the extra power cord and tie it up
with the plastic wire strap (see Figure
20, page 16). Set the power cord bundle
between the burner bracket and outer
casing, away from the burner.
6. Reinstall valve cover shield.
7. Test to make sure the blower is working
properly.
8. Reinstall upper louver assembly and hood
if previously removed, (see Figure 15,
page 13). Close lower louver door.
On
Note: When switch is in AUTO position,
fan will start after heater has run for a
few moments. Fan will continue to run
for several moments after heater has
been turned off. When switch is in the
ON position, fan will run until turned to
OFF. Reinstall upper louver assembly and
hood if previously removed, (see Figure
15, page 13). Close lower louver door.
Thermostat
Switch
(N.O.)
Figure 19 - Wiring Diagram For Blower
Accessory Built-In Installation
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15
INSTALLation
Continued
Blower Bracket
Assembly
Wire Harness
Screw
Switch Plate
Switch
3
2
1
Blue
Plastic
Wire Strap
Power
Cord
Outlet
Receptacle
Red
Valve
Cover
Wire
Shield
Harness
Clamp Connector
Box Cover
(not included)
Figure 20 - Installing Blower Bracket
Assembly
Extension Cord
Use extension cord if needed. The cord must
have a three-prong, grounding plug and a
three-hole receptacle. Make sure cord is in good
shape. It must be heavy enough to carry the
current needed. An undersized cord will cause
a drop in line voltage. This will result in loss of
power and overheating. Use a No. 16 AWG cord
for lengths less than 50 feet.
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 45° male flare fitting
5/8"-18 UNF (Unified National Fine
Thread) inlet connection and the
flexible gas line provided.
CAUTION: Never connect propane/LP fireplace directly to the
propane/LP supply. This fireplace
requires an external regulator
(not supplied). Install the external
regulator between the fireplace
and propane/LP supply.
WARNING: Never connect
natural gas fireplace to private
(non-utility) gas wells. This
gas is commonly known as
wellhead gas.
For propane/LP units, installer must supply
an external regulator. The external regulator
will reduce incoming gas pressure. You must
reduce incoming gas pressure to between
11" and 14" of water. If you do not reduce
incoming gas pressure, fireplace regulator
damage could occur. Install external regulator with the vent pointing down as shown in
Figure 21. Pointing the vent down protects it
from freezing rain or sleet.
CAUTION: Use only new,
black iron or steel pipe. Internally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe of
1/2" or greater diameter to allow
proper gas volume to fireplace.
If pipe is too small, undue loss
of volume will occur.
Propane/LP
Supply Tank
WARNING: A qualified
service person must connect
fireplace to gas supply. Follow
all local codes.
External
Regulator
Vent
Pointing
Down
Figure 21- External Regulator with Vent
Pointing Down
16
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113111-01H
INSTALLation
Continued
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 fireplace
(see Figure 22).
IMPORTANT: Install equipment shutoff valve
in an accessible location. Equipment shutoff
valve is for turning on or shutting off gas to
the appliance.
Check your building codes for any special
requirements for locating equipment shutoff
valve to fireplaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could
result in clogged fireplace valves.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
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 included from fireplace control to equipment shutoff valve
through side or rear access holes in outer
casing.
NOTICE: Most building codes do
not permit concealed gas connections. A flexible gas line is
provided to allow accessibility
from the fireplace (see Figure 23).
The flexible gas supply line connection to the equipment shutoff
valve should be accessible.
CAUTION: Avoid damage to
regulator. Hold gas regulator
with wrench when connecting it
to gas piping and/or fittings.
4. Apply pipe joint sealant lightly to male
PROPANE/LP
threads of gas connector attached to flexFrom External
ible gas line/equipment shutoff valve (see
Regulator (11" W.C.
Figure 24, page 18).
to 14" W.C. Pressure)
5. Check all gas connections for leaks. See
NATURAL
Checking Gas Connections, page 18.
From Gas Meter
3" Minimum
(5" W.C. to
Shoulder
10.5" W.C.
Screw
Pressure)
Screen
Branch
Pipe Cap Tee
Support Shipping
Screw
Nipple Joint
Sediment Trap
Figure 22 - Gas Connection
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer.
CONNECTING Equipment shutoff
valve to heater control
Installation Items Needed
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not
provided)
1. To remove fireplace screen, remove 2
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.
113111-01H
Flexible
Gas Line
Screen
Figure 23 - Removing Log Base
Assembly From Fireplace
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17
INSTALLation
Continued
6. Replace branch support back into fireplace. Feed flexible gas line into fireplace
base area while replacing branch support.
Make sure the entire flexible gas line is
in fireplace base area. Reattach branch
support to fireplace with screws removed
in step 2, page 17.
To Fireplace Gas
Regulator
Equipment Shutoff
Valve Provided by
Installer
Flexible Gas Line
from Fireplace Gas
Regulator Provided
with Fireplace
PROPANE/LP
To External Regulator
NATURAL
To Gas Supply
Figure 24 - Attaching Flexible Gas Line
to Equipment Shutoff Valve
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak detection fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure external regulator has been installed
between propane/LP supply and
fireplace. See guidelines under
Connecting to Gas Supply,
page 16.
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
main gas valve (control valve) and equipment shutoff valve from gas supply piping.
Pressures in excess of 1/2 psig will damage fireplace regulator.
2. Cap off open end of gas pipe where equipment shutoff valve was connected.
3. Pressurize supply piping system by either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas, or using compressed air.
4. Check all joints of gas supply piping system. Apply a noncorrosive leak detection
fluid to gas joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected
fittings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 25).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas, or using compressed air.
3. Check all joints from gas meter for natural
or propane/LP supply to equipment shutoff valve (see Figures 26 and 27, page
19). Apply a noncorrosive leak detection
fluid to gas joints. Bubbles forming show
a leak.
4. Correct all leaks at once.
Equipment
Shutoff
Valve
Open
Closed
Figure 25 - Equipment Shutoff Valve
18
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113111-01H
INSTALLation
Continued
Equipment
Shutoff Valve
Propane/LP
Supply Tank
Figure 26 - Checking Gas Joints for
Propane/LP Gas (Shown with Optional
Mantel)
Equipment
Shutoff Valve
Gas Meter
Pressure Testing Fireplace Gas
Connections
1. Open equipment shutoff valve (see Figure
25, page 18).
2. Open main gas valve located on or near
gas meter for natural gas or open propane/LP supply tank valve.
3. Make sure control knob of fireplace is in
the OFF position.
4. Check all joints from equipment shutoff
valve to thermostat gas valve (see Figures 26 and 27). Apply a noncorrosive
leak detection fluid to gas joints. Bubbles
forming show a leak.
5. Correct all leaks at once.
6. Light fireplace (see Operation). Check all
other internal joints for leaks.
7. Turn off fireplace (see To Turn Off Gas to
Appliance, page 21).
8. Replace front panel.
Figure 27 - Checking Gas Joints for
Natural Gas (Shown with Optional Mantel)
Operation
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly,
a fire or explosion may result
causing property damage, personal injury or loss of life.
A. This appliance has a pilot which must
be lighted by hand. When lighting
the pilot, follow these instructions
exactly.
B. BEFORE LIGHTING smell all around
the appliance area for gas. Be sure to
smell next to the floor because some
gas is heavier than air and will settle
on the floor.
113111-01H
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.
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19
OPERATIon
Continued
LIGHTING
INSTRUCTIONS
WARNING: You must operate
this fireplace with the fireplace
screen in place. Make sure fireplace screen is installed before
running fireplace.
NOTICE: During initial operation
of new fireplace, burning logs
will give off a paper-burning
smell. Orange flame will also be
present. Open window to vent
smell. Operate fireplace on HI
position to burn off odor. This
will only last a few hours.
1. STOP! Read the safety information starting, page 19.
2. Make sure equipment shutoff valve is
fully open.
3. Turn control knob clockwise
to OFF
position.
4. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the
floor. If you smell gas, STOP! Follow “B”
in safety information, page 19. If you don’t
smell gas, go to next step.
5. Turn control knob counterclockwise
to PILOT position. Press in control knob for
five (5) seconds (see Figure 28).
Note: You may be running this fireplace
for the first time after hooking up to gas
supply. If so, the control knob may need
to be pressed in for 30 seconds or more.
This will allow air to bleed from the gas
system.
•If control knob does not pop up when
released, contact a qualified service
person or gas supplier for repairs.
6. With control knob pressed in, push down
and release ignitor button. This will light
pilot. Pilot is attached to front of burner. If
needed, keep pressing ignitor button until
pilot lights.
20
Note: If pilot does not stay lit, refer to
Troubleshooting, page 24. 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 21.
7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds,
release control knob.
Note: If pilot goes out, repeat steps 3
through 7. This fireplace has a safety
interlock system. Wait one (1) minute
before lighting pilot again.
8. Turn control knob counterclockwise
to desired heating level. The main burner
should light. Set control knob to any heat
level between HI and LO.
CAUTION: Do not try to adjust heating levels by using the
equipment shutoff valve.
9. To shut off burner only and leave pilot lit,
turn countrol knob clockwise
to
PILOT position.
Ignitor Button
Control Knob
Figure 28 - Control Knob In The OFF
Position
Pilot Burner
Ignitor Electrode
Thermocouple
Figure 29 - Pilot (Propane/LP Shown)
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113111-01H
OPERATIon
Continued
TO TURN OFF GAS
TO APPLIANCE
MANUAL LIGHTING
PROCEDURE
Shutting Off Fireplace
1. Turn control knob clockwise
to the
OFF position.
2. Turn off all electric power to the appliance
if service is to be performed.
3. Close equipment shutoff valve (see Figure
25, page 18).
1. Follow steps 1 through 5 under Lighting
Instructions, page 20.
2. With control knob pressed in, strike match.
Hold match to pilot until pilot lights.
3. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds,
release control knob. Now follow step 8
under Lighting Instructions, page 20.
THERMOSTAT
CONTROL OPERATION
The thermostatic control used on this fireplace
differs from standard thermostats. Standard
thermostats simply turn on and off the burner.
The thermostat used on this fireplace senses the
room temperature. The thermostat adjusts the
amount of gas flow to the burner. This increases
or decreases the burner flame height. At times
the room may exceed the set temperature. If so,
the burner will shut off. The burner will cycle back
on when room temperature drops below the set
temperature.
The control knob can be set to any heat level
between HI and LO.
Note: The thermostat sensing bulb measures
the temperature of air near the fireplace
cabinet. This may not always agree with
room temperature (depending on housing
construction, installation location, room size,
open air temperatures, etc.). Frequent use of
your fireplace will let you determine your own
comfort levels.
Operating
Blower
This blower has three settings: ON, OFF, and
AUTO. In the ON position, blower will operate
constantly. In the OFF position, blower will not
operate. In the AUTO position, blower will start
when 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
blower turns on. After heater modulates to
pilot position, blower will continue to run.
Blower will shut off after firebox temperature
decreases.
Note: It is safe to operate fireplace with blower
turned off. However, blower helps distribute
heated air from fireplace.
OF
F
Auto/Off/On
Switch
Figure 30 - Auto/Off/On Switch
113111-01H
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21
Inspecting Burner
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 31 shows a correct pilot flame pattern.
Figure 32 shows an incorrect pilot flame pattern. The incorrect pilot flame is not properly
heating the thermocouple. This will cause
thermocouple to cool. When thermocouple
cools, the fireplace will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 32
• turn fireplace off (see To Turn Off Gas to
Appliance, page 21)
• see Troubleshooting, page 24
Note: The pilot flame on natural gas units will
have a slight curve, but flame should be blue
and have no yellow or orange color.
Pilot Burner
BURNER FLAME PATTERN
Figure 33 shows a correct burner flame pattern. Figure 34 shows an incorrect burner
flame pattern. The incorrect burner flame
pattern shows sporadic, irregular flame tipping. The flame should not be dark or have
an orange/reddish tinge.
Note: When using fireplace for the first time,
flame will be orange for approximately 1 hour
until log cures.
If burner flame pattern is incorrect, as shown
in Figure 34
• turn fireplace off (see To Turn Off Gas to
Appliance, page 21)
• see Troubleshooting, page 24
Thermocouple
Figure 33 - Correct Burner Flame Pattern
Figure 31 - Correct Pilot Flame Pattern
(Propane/LP Shown)
Pilot Burner
Thermocouple
Figure 34 - Incorrect Burner Flame
Pattern
Figure 32 - Incorrect Pilot Flame Pattern
(Propane/LP Shown)
22
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113111-01H
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.
4. Check injector holder located at end of
burner tube again. Remove any large
particles of dust, dirt, lint, or pet hair with
a soft cloth or vacuum cleaner nozzle.
5. Blow air into primary air holes on injector
holder.
6. In case any large clumps of dust have now
been pushed into burner repeat steps 3
and 4.
Clean pilot assembly also. A yellow tip on
the pilot flame indicates dust and dirt in pilot
assembly. There is a small pilot air inlet hole
about 2" from where pilot flame comes out
of pilot assembly (see Figure 36). With unit
off, lightly blow air through the air inlet hole.
You may blow through a drinking straw if
compressed air is not available.
Ports/Slots
WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clean may result in
sooting and property damage.
Burner Injector Holder and
Pilot Air Inlet Hole
The primary air inlet holes allow proper
amounts of air to mix with gas. This provides a
clean burning flame. Keep these holes clear of
dust, dirt, lint, and pet hair. Clean these air inlet
holes prior to each heating season. Blocked air
holes will create soot. We recommend that you
clean the unit every 3 months during operation
and have heater inspected yearly by a qualified
service person.
We also recommend that you keep 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. 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 unit, including pilot. Allow 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 35).
3. Blow air through ports/slots and holes in
burner.
113111-01H
Injector
Holder
Burner Tube
Primary Air Inlet Holes
Figure 35 - Injector Holder On Outlet
Burner Tube
Pilot Air Inlet Hole
Pilot Assembly
Figure 36 - Pilot Inlet Air Hole
(Propane/LP Shown)
CABINET
Air Passageways
Use a vacuum cleaner or pressurized air to
clean.
Exterior
Use a soft cloth dampened with a mild soap
and water mixture. Wipe cabinet to remove
dust.
www.desatech.com
23
Troubleshooting
WARNING: Turn off heater and let cool before servicing. Only a
qualified service person should service and repair heater.
CAUTION: Never use a wire, needle, or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
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
equipment shutoff valve
closed
2.Control knob not in PILOT
position
3.Control knob not pressed in
while in PILOT position
4.Air in gas lines when installed
5.Depleted gas supply (propane/LP only)
6.ODS/pilot is clogged
7.Gas regulator setting is not
correct
24
www.desatech.com
3.Replace ignitor cable
4.Replace piezo ignitor
5.Replace pilot assembly
6.Replace pilot assembly
1.Turn on gas supply or open
equipment shutoff valve
2.Turn control knob to PILOT
position
3.Press in control knob while
in PILOT position
4.Continue holding down
control knob. Repeat igniting operation until air is
removed
5.Contact local propane/LP
gas company
6.C l e a n O D S / p i l o t ( s e e
Cleaning and Maintenance,
page 23) or replace ODS/
pilot assembly
7.Replace gas regulator
113111-01H
Troubleshooting
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
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
1.Press in control knob fully
3.Safety interlock system has
been triggered
4.Equipment shutoff valve not
fully open
5.Thermocouple connection
loose at control valve
6.Pilot flame not touching
thermocouple, which allows thermocouple to cool,
causing pilot flame to go
out. This problem could be
caused by one or both of
the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
7.Thermocouple damaged
8.Control valve damaged
Burner does not light after
ODS/pilot is lit
1.Burner orifice is clogged
2.Inlet gas pressure too low
Delayed ignition of burner
1.Manifold pressure too low
2.Burner orifice is clogged
Burner backfiring during
combustion
1.Burner orifice is clogged or
damaged
2.Burner damaged
3.Low inlet gas pressure
4.Gas regulator defective
Yellow flame during burner
combustion
113111-01H
1.Not enough air
2.After ODS/pilot lights, keep
control knob pressed in 30
seconds
3.Wait one minute for safety
interlock system to reset.
Repeat ignition operation
4.Fully open equipment shutoff valve
5.Hand tighten until snug,
then tighten 1/4 turn more
6.A) Contact local propane/LP
or natural gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 23) or replace ODS/
pilot assembly
7.Replace pilot assembly
8.Replace control valve
1.Clean burner (see Cleaning
and Maintenance, page 23)
or replace burner orifice
2.Contact local propane/LP
or natural gas company
1.Contact local propane/LP
or natural gas company
2.Clean burner (see Cleaning
and Maintenance, page 23)
or replace burner orifice
1.Clean burner (see Cleaning
and Maintenance, page 23)
or replace burner orifice
2.Replace burner pressure
3.Contact local propane/LP
or natural gas company
4.Replace gas regulator
2.Gas regulator defective
1.Check burner for dirt and
debris. If found, clean
burner (see Cleaning and
Maintenance, page 23)
2.Replace gas regulator
www.desatech.com
25
Troubleshooting
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
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.Turning control knob to HI
position when burner is
cold
2.Air in gas line
1.Turn control knob to LO
position and let warm up
for a minute
2.Operate burner until air is
removed from line. Have
gas line checked by local
propane/LP gas company
3.Observe minimum installation clearances (see pages
9 through 12)
4.Clean burner (see Cleaning
and Maintenance, page 23)
or replace burner orifice
3.Air passageways on fireplace blocked
4.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. may turn into
white powder residue
1.Turn heater off when using furniture polish, wax,
carpet cleaners, or similar
products
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 normal with most
fireplaces. If noise is excessive, contact qualified
service person
26
www.desatech.com
113111-01H
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 unwanted odors
1.Fireplace burning vapors
from paint, hair spray,
glues, etc. (See IMPORTANT statement above)
2.Low fuel supply (propane/
LP)
3.Gas leak. See Warning
statement above
1.Ventilate room. Stop using odor causing products
while fireplace is running
1.Not enough fresh air is
available
2.Low line pressure
1.Open window and/or door
for ventilation
2.Contact local propane/LP
or natural gas company
3.C l e a n O D S / p i l o t ( s e e
Cleaning and Maintenance,
page 23)
Fireplace shuts off in use
(ODS operates)
3.O D S / p i l o t i s p a r t i a l l y
clogged
Gas odor even when control
knob is in OFF position
1.Gas leak. See Warning
statement above
2.Control valve defective
2.Refill supply tank
3.Locate and correct all leaks
(see Checking Gas Connections, page 18)
1.Locate and correct all leaks
(see Checking Gas Connections, page 18)
2.Replace control valve
Gas odor during combustion
1.Foreign matter between
control valve and burner
2.Gas leak. See Warning
statement above
1.Take apart gas tubing and
remove foreign matter
2.Locate and correct all leaks
(see Checking Gas Connections, page 18)
Moisture/condensation noticed on windows
1.Not enough combustion/
ventilation air
1.Refer to Air for Combustion
and Ventilation requirements (page 6)
113111-01H
www.desatech.com
27
Specifications
VMH26TPC
• Rating (Variable): 14,000/26,000 Btu/Hr
• Gas Type: Propane/LP Gas Only
• Ignition: Piezo
• Pressure Regulator Setting: 8" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 14" W.C., Minimum* - 11" W.C.
* For purposes of input adjustment
VMH26TNC
• Rating (Variable): 14,000/26,000 Btu/Hr
• Gas Type: Natural Gas Only
• Ignition: Piezo
• Pressure Regulator Setting: 3" W.C.
• Inlet Gas Pressure (in. of water):
Maximum - 10.5" W.C., Minimum* - 5" W.C.
* For purposes of input adjustment
For Both Models
• Dimensions (H x W x D) (including hood and screws):
Fireplace - 257/8" x 2613/16" x 93/8", Carton - 325/8" x 273/16" x 115/8"
• Weight: Fireplace - 44.5 lbs., Shipping - 48 lbs.
Service Hints
Replacement Parts
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• fireplace will not produce specified heat
• propane/LP gas supply may be low (propane/LP only)
You may feel your gas pressure is too low. If
so, contact your local propane/LP or natural
gas supplier.
Note: Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
Technical Service
You may have further questions about installation, operation, or troubleshooting. If so, contact DESA Heating, LLC at 1-866-672-6040.
When calling please have your model and
serial numbers of your heater ready.
You can also visit DESA Heating, LLC’s web
site at www.desatech.com.
Parts Under Warranty
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA Heating, LLC at 1-866-672-6040.
When calling DESA Heating, LLC, have
ready:
• your name
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• purchase date
Usually, we will ask you to return the part to
the factory.
Parts Not Under Warranty
Contact authorized dealers of this product. If
they can’t supply original replacement part(s),
call DESA Heating, LLC at 1-866-672-6040 for
referral information. A list of authorized dealers
can be found by visiting www.desatech.com.
When calling DESA Heating, LLC, have
ready:
• model and serial numbers of your heater
• the replacement part number
28
www.desatech.com
113111-01H
Accessories
NOTICE: All accessories may
not be available for all fireplace
models.
Purchase these accessories from your local
dealer. If they can not supply these accessories
call DESA Heating, LLC at 1-866-672-6040 for
information. You can also write to the address
listed on the back page of this manual.
CORNER MANTEL WITH Full
HEARTH BASE
C26TU - Unfinished, Traditional Design
C26TO - Oak Finished, Traditional Design
C26GO - Oak Finished, Georgian Design
For all models. Space-saving mantel and
hearth base corner design features clean,
classic lines. Available in a stained oak, finish or an unfinished hardwood, ready to stain
or paint. Complete assembly instructions
included. Three-sided perimeter trim kit is
sold separately.
Wall MANTEL and full hearth
base
Perimeter Trim Kit - GA6095
For all models. Optional four-sided perimeter
trim kit for custom and recessed installations
(when unit is on the floor). Provides a finished
appearance by covering rough edges of wall
opening.
Perimeter TRIM KIT
GA6094 - Polished Brass
GAB6094 - Black
GAP6094 - Platinum
For all models. Optional three-sided perimeter trim kit for recessed installations (when
unit is on the floor) or in mantel. Provides a
finished appearance by covering rough edges
of wall/mantel opening.
W26TU - Unfinished, Traditional Design
W26TO - Oak Finished, Traditional Design
W26GO - Oak Finished, Georgian Design
For all models. Mantel features clean, classic
lines. Available in a stained oak or unfinished
hardwood, ready to stain or paint. Complete
assembly instructions included. Three-sided
perimeter trim kit is sold separately.
Cleaning Kit - Cck
Your vent-free gas appliance requires regular
cleaning and maintenance to prevent performance problems. This kit gives you the tools
and instructions to make it easy to clean all
critical areas of your appliance.
fire crackle - CF6-a
Creates the sound of a real burning fire.
Extruded Louver Kit
GA9092 - Polished Brass
GAP9092 - Platinum
For all models. Optional extruded louver. Kit
contains 2 louvers.
THERMOSTATICALLY - CONTROLLED BLOWER KIT GA3450TA
For all models. Provides better heat distribution. Makes fireplace more efficient. Automatically turns off and on as needed.
113111-01H
www.desatech.com
29
Parts
Models vmh26tpC (Shown) and vmh26tnC
3
1
6
17
9
30
7
10
4
8
40
11
4
7
3
40
2
33
14
20
13
23
35
29
24
25
12-1
40
14
37
39
34
32
19
27
38
5
25
12
28
9
24
6
26 18
39
22
42
15
16
36
21
41
31
30
www.desatech.com
113111-01H
PARTS
1
2
3
4
5
6
7
8
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
43
DESCRIPTION
102633-02
102624-02
099230-02
098304-01
109824-05
103209-09
102635-02
111421-01
M10908-75
104281-02BR
102638-01
PP224
PP229
**
099211-01
103963-01
102834-01
098304-02
098303-02
**
102649-02
099415-09
099415-10
102875-01
101381-01
099387-11
098271-06
107186-01
107186-02
101006-02
098249-01
098522-26
098522-23
102639-01
101628-01
102869-01
102731-01
103295-05BR
107048-01
104313-01
104313-02
M10908-2
103734-01
M11084-26
097809-03
101629-01
107634-02
Outer Casing Top
Outer Casing
Shoulder Screw
Screw, #10 x 3/8"
Burner
Louvered Door
Left and Right Side Front
Bushing
Hex Washer Head Tapping Screw
Firebox Hood
Firebox Top
ODS/Pilot Assembly
ODS/Pilot Assembly
Firebox Wrapper
Control Bracket Screw
Inlet Tube
Burner Tube
Black Screw, #6 x 3/8
Regulator Screw
Outer Shell Base
Branch Support
Gas Regulator
Gas Regulator
Regulator Bracket
Valve Cover and Piezo
Pilot Tube
Ignitor Cable
Injector
Injector
Pilot Bracket
Nut, M5
Gas Valve
Gas Valve
Baffle
Flexible Connector
Control Bracket
Control Shield
Screen Assembly
Log Set Kit
Right Hinge
Left Hinge
Hinge Screws
Burner Support
Hex Head Screw, #10 x 3/8"
3/8 NPT x 3/8" Flare Brass Fitting
Bushing
NG Data Plate
VMH
KEY
NO. PART NO.
VMH
26T
PC
26T
NC
This list contains replaceable parts used in your fireplace. When ordering parts, follow the
instructions listed under Replacement Parts on page 28 of this manual.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
QTY
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1
1
14
15
1
2
2
1
1
1
1
1
1
1
2
1
1
4
2
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
4
2
28
1
1
1
•
•
•
•
•
•
1
1
1
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
PARTS AVAILABLE - NOT SHOWN
101054-01
100563-01
103470-01
Lighting Instruction Plate
Warning Plate
Hardware Package
** Not a field replacement part
113111-01H
www.desatech.com
31
Warranty
KEEP THIS WARRANTY
Model (located on product or identification tag)______________________________
Serial No. (located on product or identification tag)___________________________
Date Purchased ___________________________
Keep receipt for warranty verification.
DESA HEATING, LLC LIMITED WARRANTIES
New Products
Standard Warranty: DESA Heating, LLC warrants this new product and any parts thereof to be free from
defects in material and workmanship for a period of four (4) years from the date of first purchase from an
authorized dealer provided the product has been installed, maintained and operated in accordance with
DESA Heating, LLC’s warnings and instructions.
For products purchased for commercial, industrial or rental usage, this warranty is limited to 90 days from
the date of first purchase.
Factory Reconditioned Products
Limited Warranty: DESA Heating, LLC warrants factory reconditioned products and any parts thereof
to be free from defects in material and workmanship for 30 days from the date of first purchase from an
authorized dealer provided the product has been installed, maintained and operated in accordance with
DESA Heating, LLC’s warnings and instructions.
Terms Common to All Warranties
The following terms apply to all of the above warranties:
Always specify model number and serial number when contacting the manufacturer. To make a claim under
this warranty the bill of sale or other proof of purchase must be presented.
This warranty is extended only to the original retail purchaser when purchased from an authorized dealer,
and only when installed by a qualified installer in accordance with all local codes and instructions furnished
with this product.
This warranty covers the cost of part(s) required to restore this product to proper operating condition and
an allowance for labor when provided by a DESA Heating, LLC Authorized Service Center or a provider
approved by DESA Heating, LLC. Warranty parts must be obtained through authorized dealers of this product and/or DESA Heating, LLC who will provide original factory replacement parts. Failure to use original
factory replacement parts voids this warranty.
Travel, handling, transportation, diagnostic, material, labor and incidental costs associated with warranty
repairs, unless expressly covered by this warranty, are not reimbursable under this warranty and are the
responsibility of the owner.
Excluded from this warranty are products or parts that fail or become damaged due to misuse, accidents,
improper installation, lack of proper maintenance, tampering, or alteration(s).
This is DESA Heating, LLC’s exclusive warranty, and to the full extent allowed by law; this express warranty
excludes any and all other warranties, express or implied, written or verbal 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 new products and 30 days on factory reconditioned products from the date of first purchase.
DESA Heating, LLC makes no other warranties regarding this product.
DESA Heating, LLC’s liability is limited to the purchase price of the product, and DESA Heating, LLC shall
not be liable for any other damages whatsoever under any circumstances including indirect, incidental, or
consequential damages.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of
incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
For information about this warranty contact:
113111 01
NOT A UPC
DESA Heating, LLC
2701 Industrial Drive
Bowling Green, KY 42101
www.desatech.com
1-866-672-6040
113111-01
Rev. H
09/08