Vanguard VMH26PRA Quick start guide

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OWNER’S OPERATION AND INSTALLATION MANUAL
VENT-FREE PROPANE/LP GAS
COMPACT CLASSIC HEARTH®FIREPLACE
®
Shown with Optional
Cabinet Mantel/Hearth
Base Accessory
VMH26PRA
15,000 to 26,000 Btu/Hr
Remote Control Ready
WARNING: If the information in this manual is not
followedexactly,afireorexplosionmayresultcaus-
ing property damage, personal injury, or loss of life.
— Donotstoreorusegasolineorotherflammable
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.
• Donottouchanyelectricalswitch;donotuse
any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• Ifyoucannotreachyourgassupplier,callthe
fire department.
— Installation and service must be performed
byaqualifiedinstaller,serviceagency,orthe
gas supplier.
WARNING:Improperinstallation,
adjustment,alteration,service,or
maintenance can cause injury or
property damage. Refer to this
manualforcorrectinstallationand
operational procedures. For as-
sistanceoradditionalinformation
consult a qualified installer, ser-
vice agency, or the gas supplier.
WARNING: This is an unvented
gas-firedheater.Itusesair(oxy-
gen) from the room in which it
is installed. Provisions for ad-
equate combustion and venti-
lation air must be provided.
Referto AirforCombustionand
Ventilation section onpage5of
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

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107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
DANGER: Carbon monoxide
poisoning may lead to death!
SAFETY
INFORMATION
Carbon Monoxide Poisoning: Early signs
ofcarbonmonoxidepoisoningresemblethe
flu, with headaches, dizziness, or nausea. If
you have these signs, the fireplace may not
beworkingproperly.Getfreshairatonce!
Have fireplace serviced. Some people are
more affected by carbon monoxide than
others. These include pregnant women,
peoplewithheartorlungdiseaseoranemia,
those under the influence of alcohol, and
those at high altitudes.
Propane/LP Gas: Propane/LP gas is odor-
less. An odor-making agent is added to pro-
pane/LP gas. The odor helps you detect a
propane/LPgasleak.However,theodoradded
to propane/LP gas can fade. Propane/LP gas
may be present even though no odor exists.
Make certain you read and understand all
warnings.Keepthismanualforreference.It
isyourguide tosafeandproperoperationof
this fireplace.
WARNING ICON G 001
WARNINGS
IMPORTANT: Read this owner’s
manual carefully and completely
beforetryingtoassemble,operate,
or service this fireplace. Improper
use of this fireplace can cause se-
rious injury or death from burns,
fire,explosion,electricalshock,and
carbon monoxide poisoning.
WARNING: Any change to
this fireplace or its controls can
be dangerous.
1. This appliance is only for use with the
typeof gasindicated onthe rating plate.
Thisappliance isnot convertible foruse
with other gases.
2. Do notplacepropane/LP supplytank(s)
inside any structure. Locate propane/
LP supply tank(s) outdoors.
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
• ifyou cannotreach yourgas supplier,
call the fire department
WARNING: Do not allow fans
toblowdirectlyintothefireplace.
Avoidanydraftsthatalterburner
flame patterns. Ceiling fans can
create drafts that alter burner
flame patterns. Altered burner
patterns can cause sooting.
WARNING:Donotuseablower
insert, heat exchanger insert, or
otheraccessory notapprovedfor
use with this fireplace.
Due to high temperatures, the
appliance should be located out
oftrafficandaway from furniture
and draperies.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Fireplace front and screen be-
comes 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 sur-
faces to cool before touching.
Carefully supervise young chil-
drenwhentheyareinsameroom
with fireplace.
Keeptheapplianceareaclearand
free from combustible materials,
gasoline, and other flammable
vapors and liquids.
You must operate this fireplace
withthefireplacescreeninplace.
Make sure fireplace screen is in
place before running fireplace.
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
suchas pine cones, vermiculite, orrock
wool. Using these added items can
cause sooting. Do not add lava rock
aroundbase. Rock and debris could fall
into the control area of fireplace.
7. This fireplace is designed to be smoke-
less. If logs ever appear to smoke, turn
offfireplace and call a qualified service
person. Note: During initial operation,
slight smoking could occur due to log
curing and fireplace burning manufac-
turing residues.
8. To prevent the creation of soot, follow
the instructions in Cleaning and main-
tenance, page 21.
9. Before usingfurniture polish,wax, car-
pet cleaner, or similar products, turn
heater off. If heated, the vapors from
theseproducts may create a whitepow-
der residue within burner box or on
adjacent walls or furniture.
10. This fireplace needs fresh air ventila-
tion 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 Combus-
tion and Ventilation, pages 5 through
7. If fireplace keeps shutting off, see
Troubleshooting, pages 22 through 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. Neverplace any objects in thefireplace
or on logs.
14. Do notuse fireplaceif any parthas been
under water. Immediately call a quali-
fied service technician to inspect the
room fireplace and to replace any part
of the control system and any gas con-
trol which has been under water.
15. Turn off and unplug fireplace and let
cool before servicing. Only a qualified
service person should service and re-
pair fireplace.

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107034
OWNER’S MANUAL
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PRODUCT
FEATURES
SAFETY PILOT
This fireplace has a pilot with an Oxygen
Depletion Sensing (ODS) safety shutoff
system. The ODS/pilot is a required feature
for vent-free room fireplaces. The ODS/
pilot shuts off the fireplace if there is not
enough fresh air.
PIEZO IGNITION SYSTEM
This fireplace has a piezo ignitor. This sys-
tem requires no matches, batteries, or other
sources to light fireplace..
REMOTE CONTROL
ACCESSORIES
Thereare four optionalremote controls that
can be purchased separately for this log
heater:
• hand-held ON/OFF remote
• hand-held thermostat remote
• wall mounted thermostat
• wall mounted ON/OFF switch
See Accessories, pages 28 and 29.
LOCAL CODES
Installandusefireplacewithcare.Followall
localcodes.Intheabsenceoflocalcodes,use
the latest edition of The National Fuel Gas
CodeANSZ223.1,alsoknownasNFPA54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
16. Operating fireplaceabove elevationsof
4,500 feet could cause pilot outage.
17. Do not operate fireplace if any log is
broken. Do not operate fireplace if a
log is chipped (dime-sized or larger).
18. To prevent performance problems, do
not use propane/LP fuel tank of less
than 100 lbs. capacity.
UNPACKING
1. Remove log box and fireplace from
carton. IMPORTANT: The fireplace
hood is inside the cardboard protective
end wrap on the left side of fireplace
(as viewed from front). A decal is on
the outside of the cardboard end wrap
stating hood is enclosed (see Figure 2).
2. Remove hood from cardboard protec-
tive end wrap as shown in Figure 2.
3. Remove all protective packaging ap-
plied to fireplace for shipment.
4. Make sure your fireplace includes one
hardware packet.
5. Check fireplace for any shipping
damage. If fireplace is damaged,
promptly inform dealer where you
bought fireplace.
Figure 2 - Removing Fireplace Hood
IMPORTANT:
THIS PACKAGE CONTAINS A
FIREPLACE HOOD. UNWRAP
CARTON AND REMOVE HOOD
BEFORE DISCARDING
PROTECTIVE PACKAGING.
1
2
Hood
Cardboard
Protective
Fireplace
End Wrap
Hood Enclosed
Decal
PRODUCT IDENTIFICATION
Figure 1 - Vent-Free Natural Gas Compact Fireplace
AUTO
ON
OFF
COOLER
WARMER
TEMP
ON
OFF
REMOTE
Screen
Fireplace
Cabinet
Log Set
Ignitor Button
Selector Switch
(Optional)
Control
Knob Remote Control
(Optional)
SAFETY
INFORMATION
Continued

4
107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
ASSEMBLY
WARNING: Always have
branch support and screen in
place before operating fireplace.
Thispreventsexcessivetempera-
tures on fireplace surfaces.
Figure 4 - Assembling Hood
ASSEMBLING FIREPLACE
Tools Required:
• Phillips screwdriver
• 5/16" hex wrench
• slotted screwdriver
• scissors
Installing Log
1. Lift screen up and pull out to remove.
2. Cut twoplastic strapsto removethe log
from the firebox cavity.
3. An optionalbloweris available. SeeAc-
cessories, pages 28 and 29. Install op-
tional blower now. Follow installation
instructions provided with blower.
4. Remove log packaging material and
discard packaging. Gently place log set
on burner support (see Figure 3). The
log should fit flat against top of burner
supportand loglocators fit intothe slots
under the log. Do not allow log to con-
tact 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.
WARNING:Failuretoposition
thepartsinaccordancewiththese
diagrams or failure to use only
parts specifically approved with
this fireplace may result in prop-
erty damage or personal injury.
Hood Tab
Assembling Hood
1. Locate four black phillips sheet metal
screws from the hardware packet.
2. Rotate hood as shown in Figure 4.
Make sure hood tabs point toward
fireplace.
3. Insert hood tabs between baffle and
louvers (see Figure 4).
4. Gently rotate hood to upright position.
Make sure hood tabs are behind lou-
vers and hood is resting on firebox top
(see Figure 4).
5. Align screw holes on hood with screw
holes on firebox top.
6. Insert screws as shown in Figure 4.
Tighten screws firmly.
Sheet Metal
Screws
Louver
Baffle
Firebox Top
Hood
Hood Tabs
Figure 3 - Assembling Fireplace
Log
Screen
Burner
Support
Branch
Support
Shoulder
Screw

5
107034
OWNER’S MANUAL
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AIR FOR
COMBUSTION AND
VENTILATION
Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
helpreduceheatlossinhomes.Homeowners
weatherstripandcaulk around windowsand
doorstokeepthecoldairoutandthewarmair
in. During heating months, home owners
want their homes as airtight as possible.
While it is good to make your home energy
efficient,yourhomeneedstobreathe.Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.
Exhaustfans,fireplaces,clothesdryers,and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air for these appliances. This
will insure proper venting of vented fuel-
burning appliances.
WARNING: This heater shall
notbeinstalledinaconfinedspace
or unusually tight construction
unless provisions are provided
foradequatecombustionandven-
tilation air. Read the following in-
structions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National
Fuel Gas Code, NFPA 54/ANS Z223.1, Sec-
tion5.3,AirforCombustionandVentilation.
Allspacesinhomesfallintooneofthethree
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 win-
dows 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 de-
fined as construction where:
a. walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6 x 10-11 kg
per pa-sec-m2) or less with open-
ings gasketed or sealed and
b. weather stripping has been
added on openable windows and
doors and
c. caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors,be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tionsforplumbing,electrical,and
gas lines, and at other openings.
If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See Ventilation Air
From Outdoors , page 7.
If your home does not meet all of the
threecriteriaabove,proceedto Deter-
mining Fresh-Air Flow For Fireplace
Location, page 6.
Confined and Unconfined Space
The National Fuel Gas Code, ANS Z223.1
defines a confined space as a space whose
volume is less than 50 cubic feet per 1,000
Btu per hour (4.8 m3per kw) of the aggre-
gate input rating of all appliances installed
in that space and an unconfined space as a
space whose volume is not less than 50
cubic feet per 1,000 Btu per hour (4.8 m3
per kw) of the aggregate input rating of all
appliances installed in that space. Rooms
communicating directly with the space in
whichtheappliancesareinstalled*,through
openingsnotfurnishedwithdoors,arecon-
sidered a part of the unconfined space.
This heater shall not be installed in a con-
fined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.
*Adjoining rooms arecommunicating only
iftherearedoorlesspassagewaysorventila-
tion grills between them.
Continued

6
107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
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 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.
2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
_________________ (volume of space) ÷50 cu. ft. = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) ÷50 cu. ft. = 51.2 or 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.
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)
Thespace intheaboveexampleisaconfinedspacebecausetheactualBtu/HrusedismorethanthemaximumBtu/Hrthespacecansupport.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 7.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.
C. Install a lower Btu/Hr fireplace, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
WARNING:Iftheareainwhichtheheatermaybeoperatedissmallerthanthatdefinedasanunconfinedspace
or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of
the methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3 or applicable local codes.
Example:
Gas water heater 30,000 Btu/Hr
Vent-free fireplace + 26,000 Btu/Hr
Total = 56,000 Btu/Hr

7
107034
OWNER’S MANUAL
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Figure 6 - Ventilation Air from Outdoors Shown with Optional Mantel
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connecttheseitemsdirectlytotheoutdoors
orspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces. Follow the
National Fuel Gas Code, NFPA 54/ANS
Z223.1,Section5.3,AirforCombustionand
Ventilation for required size of ventilation
grills or ducts.
IMPORTANT: Donot provideopeningsfor
inlet or outlet air into attic if attic has a
thermostat-controlledpowervent.Heatedair
enteringtheatticwillactivatethepowervent.
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
AIR FOR
COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside
Building
Thisfreshairwouldcomefromanadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(seeoptions1and2,Figure5).Youcanalso
remove door into adjoining room (see op-
tion 3, Figure 5). Follow the National Fuel
Gas Code, NFPA 54/ANS Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
WARNING: Rework work-
sheet, adding the space of the
adjoiningunconfinedspace.The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Figure 5 - Ventilation Air from Inside Building Shown with Optional Mantel
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Ventilation
Grills
into Adjoining
Room,
Option 1

8
107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
CHECK GAS TYPE
Useonlypropane/LPgas.Ifyourgassupply
is not propane/LP, do not install fireplace.
Call dealer where you bought fireplace for
proper type fireplace.
INSTALLATION ITEMS
Before installing fireplace, make sure you
have the items listed below.
• external regulator (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
* AnCSA/AGAdesign-certifiedequipment
shutoffvalvewith1/8"NPTtap is anaccept-
able alternative to test gauge connection.
Purchase the optional CSA/AGA design-
certified equipment shutoff valve from your
dealer. See Accessories, pages 28 and 29.
Note: Ifdesired,purchaseafour-sidedbrass
trimkitfor built-in installations.SeeAcces-
sories, pages 28 and 29.
WARNING: A qualified ser-
vicepersonmustinstallfireplace.
Follow all local codes.
Note: YourVanguardfireplaceisdesigned
to be used in zero clearance installations.
Wall or framing material can be placed
directly against any exterior surface of
yourfireplace,exceptwherestandoffspac-
ersareintegrallyattached.Ifstandoffspac-
ers are attached to your fireplace, these
spacers can be placed directly against wall
or framing materials.
Use the dimensions shown for rough open-
ings to create the easiest installation (see
Built-In Fireplace Installation, page 9).
WARNING:Maintainthemini-
mum clearances shown in Fig-
ure 7. If you can, provide greater
clearances from floor, ceiling,
and joining wall.
LOCATING FIREPLACE
WARNING: Never install the
fireplace
• in a bedroom or a bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objectsarelessthan36inches
from the front, top, or sides of
the fireplace
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
CAUTION: This fireplace cre-
ateswarmaircurrents.Thesecur-
rents move heat to wall surfaces
next to fireplace. Installing fire-
place next to vinyl or cloth wall
coverings or operating fireplace
where impurities (such as to-
bacco smoke, aromatic candles,
cleaning fluids, oil or kerosene
lamps, etc.) in the air exist, may
discolor walls.
IMPORTANT: Vent-freefireplacesaddmois-
ture to the air. Although this is beneficial,
installing fireplace in rooms without enough
ventilationairmaycausemildewtoformfrom
too much moisture. See Air for Combustion
and Ventilation, pages 5 through 7.
CAUTION: If you install the
fireplace in a home garage
• fireplacepilotandburnermust
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, pages 28 and
29). If planning to use blower, locate fire-
place near an electrical outlet.
INSTALLATION
NOTICE: This heater is intended
foruseassupplementalheat.Use
this heater along with your pri-
mary heating system. Do not in-
stall this heater as your primary
heatsource.If youhavea central
heating system, you may run
system’scirculatingblowerwhile
usingheater.Thiswillhelpcircu-
late the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
You can recess firebox into the wall. You
can also position fireplace in the optional
cabinet or corner mantels. IMPORTANT:
Onlyuse optional cabinetor corner mantels
specified in this manual. Purchase the op-
tional mantel from your dealer (see Acces-
sories, pages 28 and 29).
Minimum Clearances For Side
Combustible Material, Side Wall,
and Ceiling
A. Clearances from theside of thefireplace
cabinetto anycombustible material and
wall should follow diagram in Figure 7.
Example: The face of a mantel, book-
shelf, etc. is made of combustible ma-
terial and protrudes3 1/2"from the wall.
This combustible material must be 4"
from the side of the fireplace opening
(see Figure 7).
B. Clearancesfrom the top of the fireplace
openingto theceiling should notbe less
than 42 inches.
C. For mantel clearances, see Figure 11
on page 10.
.5 2
7/16
7/8
1
3
/ 4
3
1
/ 2
5
1
/ 4
7
8
3
/ 4
10
1
/ 2
12
1
/ 4
1 4 6 8 10 12 14 16
FIREBOX INCHES
INCHES
Figure 7 - Minimum Clearance for
Combustible to Wall
*Minimum 16 inches from Side Wall
*
Example

9
107034
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Figure 10 - Attaching Fireplace to Wall
Studs
Nailing
Flanges
Nails or
Wood
Screws
INSTALLATION
Continued
2. If installing GA3400T blower acces-
sory, do so at this time. Follow instruc-
tions included with blower accessory.
Note: If not installing blower acces-
sory, you may wish to run electrical
wiring to your fireplace for future
blower installation (see Accessories,
page 28 and 29). Use only approved
three-wire electrical wiring.
36 5/8" 25 7/8"
51 3/4"
26 7/8"
Figure9-RoughOpeningforInstallingin
Corner
BUILT-IN FIREPLACE
INSTALLATION
Built-ininstallationofthisfireplaceinvolves
installing fireplace into a framed-in enclo-
sure. This makes the front of fireplace flush
with wall. An optional brass trim kit acces-
sory is available (see Accessories, pages 28
and29). Brass trim will extendpast sidesof
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 clear-
ances shown in Figure 11, page 10. Follow
theinstructionsbelowtoinstallthefireplace
in this manner.
Actual Framing
Height 26" 26 7/8"
Front Width 26 3/4" 26 7/8"
Depth 9 1/2" 10 1/2"
Bottom 3/4" 3/4"
1. Frame in rough opening. Use dimen-
sions shown in Figure 8 for the rough
opening.
If installing in a corner, use dimensions
shown in Figure 9 for the rough open-
ing. The height is 26 7/8" which is the
same as the wall opening above.
26 7/8"
26 7/8"
3/4" Off
The Floor
Minimum
10 1/2"
Figure8-RoughOpeningforInstallingin
Wall
WARNING: Do not allow any
combustible materials to overlap
the firebox front facing.
IMPORTANT: When finishing your fire-
box, combustible materials such as wall
board, gypsum board, sheet rock, drywall,
plywood, etc. may be butted up next to the
sides and top edge of the firebox. Combus-
tible materials should never overlap the
firebox front facing.
IMPORTANT: Noncombustible materials
suchasbrick,tile,etc.mayoverlapthefront
facing, but should never cover any neces-
sary openings like louvered slots.
WARNING: Do not allow non-
combustible materials to cover
any necessary openings like lou-
vered slots.
WARNING:Useonlynoncom-
bustible mortar or adhesives
when overlapping the front fac-
ing with noncombustible facing
material.
WARNING: Never modify or
cover the louvered slots on the
front of the firebox.
Continued
WARNING: If pre-wiring, do
notconnectwiringto any electri-
cal source at this time.
Install fireplace electrical outlet
and connect wiring to outlet be-
fore connecting to electrical
source. The fireplace electrical
outlet is included with the
GA3400T blower accessory.
Only use the fireplace electrical
outletsuppliedwiththeGA3400T
blower accessory.
Note: Aqualified 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, fol-
low 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 Fireplace to
Gas Supply, page 14.
7. Bend four nailing flanges on outer cas-
ing with pliers (see Figure 10).
8. Attach fireplace to wall studs using
nails or wood screws through holes in
nailing flange.
9. Check allgasconnections forleaks. See
Checking Gas Connections, page 15.
10. If using optional brass trim kit, install
the trim after final finishing and/or
painting of wall. See instructions in-
cluded with brass trim accessory for at-
taching brass trim.

10
107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
Assembling Brass Trim (Brass
trim shipped with mantel)
1. Remove packaging from three remain-
ing pieces of brass 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, page 11.
4. Slide one end of adjusting plate/shim
inslot on mitered edge of top brass trim
(see Figure 14, page 11).
5. Slide other end of adjusting plate/shim
in slot on mitered edge of side brass
trim (see Figure 14, page 11).
6. While firmly holding edges of brass
trim together, tighten both set screws
on the adjusting plate with slotted
screwdriver.
7. Repeat steps 1 through 6 for other
corner.
8. Set brass assembly aside for later
installation.
INSTALLATION
Continued
OPTIONAL MANTEL
INSTALLATION
Note: Refer to instructions provided with
the mantel for assembly instructions. Refer
to instructions below for system installa-
tion. Refer to instructions on page 4 for
fireboxassembly.Blower accessoryshould
be installed if it is being used (see Accesso-
ries, pages 28 and 29).
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 Assem-
bling Brass Trim.
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).
Figure 12 - Attaching Brass Trim to
Fireplace
Figure13-AttachingWoodBasetoFloor
1 3/4" Screw
Wood
Base
8. Remove brass trim kit and mantel. Be
careful not to damage wall or mantel.
9. Place wood base next to wall at instal-
lation location.
10. Attachwood baseto floorwith 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 13).
11. Install gas line. See Connecting To Gas
Supply, page 13.
12. Check for leaks. See Checking Gas
Connections, page 15.
13. Place mantelaround fireplace.Be care-
ful not to damage wall or mantel.
14. Place brass trim kit on the shoulder
screws located on the side and top of
thefireplace. Firmlysnap thebrass trim
over the shoulder screws on fireplace
(see Figure 12).
15. Adjust assembly to remove any gaps.
Attach remaining two 3" wood screws
from hardware pack through openings
inside of fireplace sides into the man-
tel. The openings are located at top be-
hind the area for the brass louvers (see
Figure 12).
16. Reinstall top brass louvers.
13" 16"
19"
21"
2 1/2"
6"
8"
10"
Note:
All vertical
measurements
are from top of
fireplace
opening to
bottom of
mantel shelf. All
measurements
are in inches.
Figure 11 - Minimum Mantel Clearances
for Built-In Installation
Mantel Shelf
Side of
Firebox
Shoulder
Screws
Assembled
Brass Trim
Hole for 3"
wood screw
for attaching
fireplace to
wooden base
Hole for 3" wood screw for
attaching fireplace to mantel
Mantel Clearances for Built-In
Installation
If placing mantel above built-in fireplace,
youmustmeetminimumclearancebetween
mantel shelf and top of fireplace opening.
NOTICE:If yourinstallationdoes
notmeettheminimumclearances
shown, you must do one of the
following:
• raise the mantel to an accept-
able height
• remove the mantel
NOTICE:Surfacetemperaturesof
adjacent walls and mantels be-
comehotduringoperation.Walls
and mantels above the firebox
may become hot to the touch. If
installedproperly,thesetempera-
turesmeettherequirementofthe
national product standard. Fol-
low all minimum clearances
shown in this manual.

11
107034
OWNER’S MANUAL
For more information, visit www.desatech.com
3
2
1
Continued
Figure 15 - Removing Upper Louver
Assembly and Branch Support
INSTALLATION
Continued
Blower Bracket
Mounting Holes
INSTALLING BLOWER
ACCESSORY GA3400T
Removing Upper Louver
Assembly
To install the blower accessory, you must
first remove the upper louver assembly.
1. Liftscreen offheaterandremove log set.
2. Remove 2 screws from each side of
branch support and pull branch support
out (see Figure 15).
3. Remove 4 brass-plated screws from
louver assembly (see Figure 16). Save
these screws.
4. Pull louver assembly straight out from
the cabinet. Be careful not to scratch
the paint. Set louver assembly and
screws aside.
Wire
Harness
Blower Bracket
Assembly
Screw
Power
Cord
Wire
Harness
Switch
Baffle
Wiring Routing
Hole in Baffle
Switch
Plate
Blue Red
Installing Blower Assembly
Note: If you are using a mantel with your
heater, use the following instructions. If
your heater is built-in, see For Built-In In-
stallation on page 12.
1. Install snapbushingsfound inhardware
kitinto bothholes inrear ofvalve cover
shield.
2. Make sure the wire harness is firmly
connected to the terminals on the
blower bracket assembly.
Figure 16 - Installing Blower Bracket Assembly
Valve Cover
Shield
Snap
Bushing
Upper Louver
Assembly
Branch Support
CAUTION: Label all wires
priortodisconnectionwhenser-
vicing controls. Wiring errors
cancauseimproperanddanger-
ous operation.
CAUTION: Verify proper
operation after servicing.
Side Brass
Trim
Top Brass Trim
Mitered Edge
Figure 14 - Assembling Brass Trim
Shim
Set
Screws
Adjusting
Plate
Slot
Slot
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 3 and blue wire from termi-
nal 1. Black wire can remain on middle
terminal 2 (see Figure 16).
4. Carefully disconnect green and white
wires at their insulated connectors.
5. In top of the heater cabinet, locate the
four mounting holes on the outer cas-
ing. Align these four holes with those
on the blower bracket assembly.Attach
blower bracket assembly to the outer
casing with 4 #10 screws provided (see
Figure 16).
6. Route thewire harness through the hole
in left side of baffle. Pull wire harness
through lower opening on the side of
the valve shield. (see Figure 16).
7. Insert the 4 wire harness into one of the
roundholesin the rearofthevalve cover
shield and through the rectangular hole
in the front of shield (see Figure 16).

12
107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
Red
Red
Fan Switch
(Auto/Off/On)
Blue
Blue
Thermostat
Switch
(N.O.)
Green
White Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
1
23
Auto
Figure 20 - Installing Blower Bracket Assembly
Figure17-InstallingSwitchPlatetoValve
Cover Shield
INSTALLATION
Continued
1. Install a snap bushing found in hard-
warekit intoone ofthe holesfound 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 11.
3. A licensed electrician must follow the
wiring diagram to connect incoming
electrical supply to fan kit wiring har-
ness (see Figure 19).
4. Plug powercord to the outlet receptacle
(not provided) as shown in Figure 20.
Wind the extra cable in power cord and
and tie it up with the plastic wire strap
Figure 18 - Wiring Diagram For Blower
Accessory Standard Installation
Figure 19 - Wiring Diagram For Blower Accessory Built-In Installation
Red
Red
Fan Switch
(Auto/Off/On)
Blue
Blue
Thermostat
Switch
(N.O.)
Green
White Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
1
23
Auto
For Built-In Installation
WARNING: A licensed electri-
cian must connect the wiring har-
ness to electrical supply following
all local codes. Electrician must
provideaclampontheboxcoverto
securethewiring.Wiringshouldbe
routed through the bushing in the
hole on the outer casing of heater.
Blower Bracket Assembly
Screw
Wire
Harness
Power
Cord
Plastic
Wire
Strap
Wire
Harness
Switch
Switch
Clamp Connector
(not included)
Blue Red
Outlet
Receptacle
(Not Supplied)
8. Reconnect red wire to switch position
3. Reconnect blue wire to switch posi-
tion1.Reconnect green andwhitewires.
9. Install theswitchplateonthevalvecover
shield with 2 #10 screws provided (see
Figure 17). Route power cord out of the
cabinetby insertingit throughthe bush-
ing on the outer casing (see Figure 16,
page 11). Plug fan kit into 120-Volt
grounded power supply and test opera-
tion. Note: Whenswitchis in theAUTO
position,thefan will startaftertheheater
has run for a few moments. The fan will
continue to run for several moments af-
ter the heater has been turned off.When
switchis intheON position,thefan will
run until turned to OFF. Reinstall upper
louverassembly(seeFigure15,page 11)
and branch support. Close lower louver
door.
Valve Cover
Shield
Switch
Plate Screw
(see Figure 20). Set the cable bundle
between the burner bracket and outer
casing, away from the burner.
5. Test to make sure the blower is work-
ing properly.
6. Reinstallupperlouverassembly(seeFig-
ure 15, page 11) and close lower louver.
Extension Cord
Useextension cordif needed.The cordmust
have a three-prong, grounding plug and a
three-hole receptacle. Make sure cord is in
goodshape.Itmustbeheavyenoughtocarry
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.

13
107034
OWNER’S MANUAL
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CONNECTING TO GAS
SUPPLY
Figure 22 - External Regulator with Vent
Pointing Down
WARNING: A qualified ser-
vice person must connect fire-
place to gas supply. Follow all
local codes.
CAUTION:Neverconnectfire-
place directly to the propane/LP
supply. This fireplace requires
an external regulator (not sup-
plied).Install theexternalregula-
torbetweenthefireplaceandpro-
pane/LP supply.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes.Usepipeof1/2"
or greater diameter to allow
propergas volumeto fireplace.If
pipe is too small, undue loss of
pressure will occur.
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
Theinstallermust supply anexternalregu-
lator. The external regulator will reduce
incoming gas pressure. You must reduce
incoming gas pressure to between 11 and
14 inches of water. If you do not reduce
incoming gas pressure, fireplace regulator
damage could occur. Install external regu-
latorwiththeventpointingdownasshown
in Figure 22. Pointing the vent down pro-
tects it from freezing rain or sleet.
We recommend that you install a sediment
trap in supply line as shown in Figure 23.
Locate sediment trap where it is within
reach for cleaning. Install in piping system
betweenfuelsupplyandheater.Locatesedi-
menttrap 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.
Propane/LP
Supply Tank
Vent Pointing Down
External Regulator
Attaching Wood Base to Solid
Floor
For attaching base to solid floors (concrete
or masonry)
Note: Floor anchors and mounting screws
areinhardwarepackage.Thehardwarepack-
age 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. Foldfloor anchor asshown in Figure21.
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 fas-
tened to floor.
Installationmustincludeaequipmentshutoff
valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
fireplace (see Figure 23).
IMPORTANT: Install equipment shutoff
valve in an accessible location. The equip-
ment shutoff valve is for turning on or
shutting off the gas to the appliance.
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
fromgoing intopipe. Excess sealantin pipe
could result in clogged fireplace valves.
Continued
Figure 23 - Gas Connection
3" Minimum
From External
Regulator
(11" W.C.** to
14" W.C.
Pressure)
CSA/AGA Design-Certified Equipment
Shutoff Valve with 1/8" NPT Tap*
Gas Control
Approved Flexible
Gas Hose
Tee Joint
Pipe
Nipple
Cap
Sediment Trap
*Purchase the optional CSA/AGA design-certified equipment shutoff valve from your
dealer. See Accessories, pages 28 and 29.
**Minimum inlet pressure for purpose of input adjustment.
Figure 21 - Folding Anchor
INSTALLATION
Continued
WARNING: This appliance re-
quiresa 45°maleflarefitting 5/8"-
18 UNF (Unified National Fine
Thread) inlet connection and the
flexible gas line provided.

14
107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
INSTALLATION
Continued
CONNECTING FIREPLACE
TO GAS SUPPLY
Installation Items Needed
• 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 fireplacescreen up andpull
out to remove.
2. Remove screws that attach branch sup-
port to fireplace (see Figure 24). Care-
fully lift up branch support and remove
from fireplace (see Figure 24).
3. Route flexible gas line (provided by
installer)from equipment shutoff valve
into fireplace through side or rear ac-
cess holes in outer casing. Route flex-
ible gas supply line through fireplace
access holes in outer casing.
NOTICE: Most building codes do
not permit concealed gas con-
nections. A flexible gas line (see
Figure 25) is provided to allow
accessibility from the fireplace.
The flexible gas supply line con-
nection to the equipment shutoff
valve should be accessible.
4. Apply pipe joint sealant lightly to male
threads of gas connector attached to
flexible gas line (see Figure 25). Con-
nectflexible gas line to flexible gas line
attached to gas valve of fireplace (see
Figure 25).
5. Check allgasconnections forleaks. See
Checking Gas Connections, page 15.
6. Replace branch support back into fire-
place. Feed flexible gas line into fire-
place base area while replacing branch
support. Make sure the entire flexible
gas line is in fireplace base area. Reat-
tach branch support to fireplace with
screws removed in step 2.
Figure 24 - Removing Branch Support From Fireplace
Flexible Gas Line from
Fireplace Gas Valve
Provided with Fireplace
To Fireplace
Gas Valve
Figure 25 - Attaching Flexible Gas Lines Together
Gas Connector
Flexible Gas Line from
Equipment Shutoff Valve
Provided by Installer
Equipment shutoff
valve
➞
To Gas
Supply
Branch
Support
Shoulder
Screw
Screen
➞
CAUTION: Avoid damage to
regulator.Holdgasregulatorwith
wrenchwhenconnectingittogas
piping and/or fittings.

15
107034
OWNER’S MANUAL
For more information, visit www.desatech.com
ON
POSITION
OFF
POSITION
Pressure Testing Gas Supply
Piping System
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect fireplace and its individual
equipment shutoff valve from gas sup-
plypiping system.Pressures in excessof
1/2 psig will damage fireplace regulator.
2. Cap off open end of gas pipe where
equipmentshutoffvalvewas connected.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Reconnect heater equipment shutoff
valveto gas supply. Check reconnected
fittings for leaks.
Open
Closed
Equipment
Shutoff
Valve
Figure 27 - Checking Gas Joints Shown with Optional Mantel
CHECKING GAS
CONNECTIONS
Figure 26 - Equipment Shutoff Valve
Equipment
Shutoff
Valve
Propane/LP
Supply Tank
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
to all joints. Bubbles forming
show a leak. Correct all leaks at
once.
TestPressuresEqualToorLessThan
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see
Figure 26).
2. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
3. Check all joints from propane/LP sup-
plytank toequipmentshutoffvalve(see
Figure 27). Apply mixture of liquid
soap and water to gas joints. Bubbles
forming show a leak.
4. Correct all leaks at once.
Pressure Testing Fireplace Gas
Connections
1. Open equipment shutoff valve (see
Figure 26).
2. Open propane/LP supply tank valve.
3. Make sure control knob of fireplace is
in the OFF position.
4. Check alljointsfrom equipmentshutoff
valve to thermostat gas valve (see Fig-
ure 27). Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Light fireplace (see Operating Fire-
place, pages 18 through 20). Check all
other internal joints for leaks.
7. Turn off fireplace (see To Turn Off Gas
to Appliance, page 19).
8. Replace front panel.
INSTALLATION
Continued
CAUTION:Makesureexternal
regulator has been installed be-
tweenpropane/LPsupplyandfire-
place.See guidelinesunder Con-
necting to Gas Supply , page 13.
Continued

16
107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
OPTIONAL WALL MOUNTED
THERMOSTAT - GWMT1
WARNING: Do not connect
this thermostat to any electrical
source! Electrical shock and/or
fire hazard will occur.
1. Connect one terminal of 25 ft. wire to
bottomcontact ofswitch (seeFigure 33,
page 17).
2. Connectremaining wire terminal to the
“TH” terminal on the control valve.
Makesure that wire terminals arein the
positions on your unit as pictured in
Figure 33 on page 17. If wires are not
“crossed” the thermostat will not work.
3. Route the 25 ft. wire to a convenient
location to mount your thermostat (no
outside wall). IMPORTANT: The wire
may be shortened but must not be
lengthened.
The thermostat should be mounted 54"
above the floor in a location where there
isgoodaircirculation.Avoidheatsources
such as lamps, direct sunlight, fireplace,
or heat and air conditioning ducts.
4. Gently remove the cover of the ther-
mostat from the base. Grasp the sides
of the cover firmly and pull to separate
from the base.
5. Feed the electrical wires through the
rectangular slots on each side of the
base (see Figure 34, page 17).
WARNING: Do not connect
thethermostattoapowersource.
Electricalshockand/orafirehaz-
ard will occur.
WARNING: Read and follow
installation instructions. Instal-
lation should be done by a quali-
fied installer familiar with low-
voltage wiring procedures.
Figure 30 - Installing Remote Receiver
* Wire harness provided in the fireplace
hardware pack.
Installing 9-Volt Battery in Hand-
Held Remote Control Unit
1. Remove battery cover on back of re-
mote control unit.
2. Attachterminal wires tothe battery(not
included).Place battery into the battery
housing.
3. Replace batterycover ontoremote con-
trol unit.
Figure 31 - Installing Battery in Hand-
Held Remote Control Unit (GHRC Series)
Wires from
Valve
Wire Harness*
Black Wire Red Wire
Red Wire
Black Wire
Battery
Cover
9-Volt
Battery
Terminal
Wires
Remote
Control Unit
Battery
Housing
Figure32-InstallingBatteryinHand-Held
Remote Control Unit (GHRCTA Series)
Remote
Control
Unit
INSTALLATION
Continued
OPTIONAL WIRELESS HAND-
HELD REMOTE CONTROL
ACCESSORIES
(GHRC Series & GHRCTA
Series)
Installing Receiver
1. Remove screws.
2. Disconnect switch wires from the con-
trol valve.
3. Remove switch plate (see Figure 28).
Discard switch plate after removing.
Save the screws.
4. Locate the battery clip mounted on the
back of the receiver (see Figure 29).
5. Slide 9-volt battery (not included)
through the clip.
6. Attach the terminal wires to the battery
(see Figure 29).
7. Connect wires as shown in Figure 30.
8. Install remote receiver unit onto gas
heater base using the two screws re-
moved in step one (see Figure 30).
Figure 28 - Switch Plate and Wiring
Harness
Screw
Switch Plate
Black Wire
Red Wire
Figure 29 - Attaching Battery to Receiver
Battery Clip
9-Volt Battery
Receiver
Terminal
Wires

17
107034
OWNER’S MANUAL
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INSTALLATION
Continued
Figure 33 - Connecting Wire Terminals
OPTIONAL WALL SWITCH -
GWMS2
WARNING: Do not connect
this switch to any electrical
source! Electrical shock and/or
fire hazard will occur.
6. Connect one bare wire end to each ter-
minal (“W” and “R”) of the thermostat
base (see Figure 35).
7. Install the base onto the wall with the
provided screws.
8. Move the temperature adjustment back
and forth to insure the bimetal is free
from restrictions.
9. Replace the cover onto the base. (Upon
installation, the thermostat must be al-
lowed to stabilize at room temperature
for a minimum of 30 minutes for
proper operation).
10. Set switch on heater to Auto position.
11. Set the temperature adjustment to the
desiredsetting.This thermostathasbeen
electronically calibrated at the factory.
No adjustment or leveling is necessary.
1. Connect one terminal of 25 ft. wire to
bottomcontactof switch(seeFigure33) .
2. Connect remainingwire terminalto the
“TH” terminal on the control valve.
Make sure that wire terminals are in
the positions on your unit as pictured
in Figure 33. If wires are not “crossed”
the thermostat will not work.
3. Route the 25 ft. wire to a convenient
location to mount your wall switch (no
outside walls).
WARNING: Do not connect
the switch to a power source.
Electrical shock and/or fire haz-
ard will occur.
WARNING: Read and follow
installation instructions. Instal-
lation should be done by a quali-
fied installer familiar with low-
voltage wiring procedures.
AUTO
OFF
ON
One
terminal of
25 ft. wire
Switch on Gas
Heater
To Wall
Thermostat
or Switch To Wall
Thermostat or
Switch
Control
Valve
Figure34-BackViewofThermostatBase
Feed wires through
rectangular slots
W
R
Figure 35 - Thermostat Base Terminals
“W” and “R”
Terminal “W”
Terminal “R”
IMPORTANT: The wire may be shortened
but must not be lengthened.
4. Connect one bare wire end to each of
theterminalsoftheprovidedwallswitch.
5. Install the wall switch and cover in
the wall.

18
107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
CAUTION:Donottrytoadjust
heatinglevelsbyusingtheequip-
ment shutoff valve.
WARNING: Make sure the
selector switch is in the OFF po-
sition when you are away from
home for long periods of time.
Heater will come on automati-
cally with selector switch in the
ON position.
LIGHTING
INSTRUCTIONS
NOTICE: During initial operation
of new heater, burning logs will
give off a paper-burning smell.
Open window to vent smell. This
will only last a few hours.
OPERATING
FIREPLACE
FOR YOUR SAFETY
READ BEFORE
LIGHTING
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
A. Thisappliancehas a pilot whichmust
belightedby hand.When lighting the
pilot,followthese instructionsexactly.
B. BEFORE LIGHTING smell all
aroundtheappliance areaforgas. Be
suretosmell nextto thefloor because
some gas is heavier than air and will
settle on the floor.
WHATTODOIFYOUSMELLGAS
• Do not try to light any appliance.
• Donot touchany electricswitch; do
notuse any phoneinyourbuilding.
• Immediatelycall yourgassupplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
C. Useonly yourhandto pushinorturn
thegas controlknob.Neveruse 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 re-
place any part of the control sys-
tem and any gas control which has
been under water.
WARNING:Youmustoperate
this fireplace with the fireplace
screen in place. Make sure fire-
place screen is installed before
running fireplace.
1. STOP! Read the safety information,
column 1.
2. Make sure equipment shutoff valve
is fully open.
3. Set switch in OFF position.
WARNING: Burner will come
on automatically within one
minute when the selector switch
is in the ON position after the
pilot is lit.
4. Pressinand turncontrolknob clock-
wise to the OFF position.
5. Waitfive(5)minutesto clearout any
gas. Then smell for gas, including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation. If you don’t smell gas, go
to the next step.
6. Pressinandturn controlknobcoun-
terclockwise to the PILOT
position. Press in control knob for
five (5) seconds (see Figure 36).
Note: You may be running this
heater for the first time after hook-
ing up to gas supply. If so, the con-
trol knob may need to be pressed in
for 30 seconds or more. This will al-
low air to bleed from the gas system.
7. With control knob pressed in, press
and release ignitor button. This will
lightpilot.Thepilotisattachedtothe
front burner. If needed, keep press-
ing ignitor button until pilot lights.
Note: If pilot does not stay lit, con-
tact a qualified service person or gas
supplierforrepairs.Untilrepairsare
made,light pilotwith match.To light
pilot with match, see Manual Light-
ing Procedure on page 19.
8. Keep control knob pressed in for 30
seconds after lighting pilot.After 30
seconds, release control knob.
• If control knob does not pop out
when released, contact a qualified
service person or gas supplier for
repairs.
Note: If pilotgoes out,repeatsteps
4 through 8.
9. Slightly push in and turn control
knobcounterclockwise tothe
ON position.
10. Wait one minute and switch selec-
tor switch to the ON position to
light burner.
11. Set flame adjustment knob to any
level between HI and LO.
Figure 36 - Control Knob and Ignitor Button Location (Shown as Supplied,
No Control Options)
O
F
F
P
I
L
O
T
O
N
L
O
I
H
AUTO
OFF
ON
Control Knob
Ignitor Button
Selector
Switch in
OFF Position Flame
Adjustment
Knob

19
107034
OWNER’S MANUAL
For more information, visit www.desatech.com
OPERATING
FIREPLACE
Continued
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turncontrolknob clockwise
to the OFF position.
2a. SetselectorswitchintheOFFposition.
2b. If Using Optional Hand-Held Re-
mote:Set selectorswitchin theOFF
positiontokeepfromdrainingbattery.
Shutting Off Burner Only (pilot
stays lit)
Youmayshutofftheburnerandkeepthe
pilot lit by doing one of the following:
• Turn control knob clockwise
to the PILOT position.
• UseremotecontrolmanualOFFbutton.
• Setselector switchin theOFF position.
MANUAL LIGHTING
PROCEDURE
Thermostat Control Operation
(Optional GHRCTA Series Only) The
thermostat control setting on the remote
controlunitcanbesettoanycomfortlevel
between WARMER and COOLER. The
burnerwillturn onandoff automatically
to maintain the comfort level you select.
The ideal comfort setting will vary by
householddependingupontheamountof
space to be heated, the output of the cen-
tral heating system, etc.
For wall thermostat operation, follow in-
struction supplied with thermostat acces-
sory GWMT1. For wall switch operation
followinstructionssuppliedwithGWMS2.
1. Followsteps 1through6underLight-
ing Instructions, page 18.
2. Depress control knob and light pilot
with match.
3. Keep control knob pressed in for 30
seconds after lighting pilot.After 30
seconds, release control knob. Now
follow steps 9 through 11, page 18.
OPTIONAL REMOTE
OPERATION
Note: Allremotecontrolaccessoriesmust
bepurchasedseparately(seeAccessories,
pages 28 and 29). Follow installation in-
structions on page 16 of this manual.
NOTICE: You must light the pilot
before using the hand-held re-
mote control unit. See Lighting
Instructions on page 18.
1. Afterlighting, letpilotflameburnfor
aboutone minute.Turn controlknob
to ON position.Adjust flame adjust-
ment knob anywhere between HI
and LO. Slide the selector switch to
the REMOTE position. Note: The
burner maylight ifhand-heldremote
ON button was on when selector
switch was last turned off. You can
now turn the burner on and off with
the hand-held remote control unit.
Figure38-SettingtheSelectorSwitch,ControlKnob,andFlameAdjustmentKnobfor
Remote Operation
Continued
Figure 37 - Pilot
O
F
F
P
I
L
O
T
O
N
L
O
I
H
REMOTE
OFF
ON
Flame Adjustment Knob
Control Knob
Selector Switch in Remote
Position (Optional Remote Control)
Ignitor
Electrode
Pilot Burner
IMPORTANT: Do not leave the se-
lector switch in the REMOTE posi-
tionwhen thepilotis notlit.This will
drain the battery.
IMPORTANT: Be sure to press the
ON/OFF buttons on the hand held
remote control unit for up to 3 sec-
onds to assure proper operation.
GHRC Series Operation:
2a. PresstheON/OFFbuttonto turnthe
burner on and off. When turning
burner off, the pilot will remain lit.
GHRCTA Series Operation:
2b. Press theAUTO/ON/OFF button on
the hand-held remote control (see
Figure 39, page 20). The lights to the
left of the button will show AUTO,
ON, or OFF.
• In the ON mode, the burners will
ignite. The heater is in manual
mode when ON is lit.
• IntheAUTOmode, thethermostat
in the hand-held remote unit con-
trols the room temperature.To in-
creasethe roomtemperature,press
the top arrow of theTEMP button.
To lower the room temperature,
press the bottom arrow of the
TEMP button. At higher settings
the heater will run longer.

20
107034
COMPACT CLASSIC HEARTH FIREPLACE
VMH26PRA
®
For more information, visit www.desatech.com
Figure 41 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Figure 42 - Incorrect Pilot Flame Pattern
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 41 shows a correct pilot flame pat-
tern. Figure 42 shows an incorrect pilot
flame pattern. The incorrect pilot flame is
not properly heating the thermocouple.
When the thermocouple cools, the heater
will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 42.
• turn heater off (see To Turn Off Gas to
Appliance, page 19)
• seeTroubleshooting,pages 22through 24
Pilot Burner Thermocouple
INSPECTING
BURNERS
OPERATING
FIREPLACE
Continued
GWMT1 WALL
MOUNTED
THERMOSTAT
(OPTIONAL)
Make sure the heater switch is on AUTO
and set the temperature adjustment on
wall thermostat to the desired setting.
The thermostat has been electronically
calibrated at the factory and requires no
adjustment or leveling.
Upon installation, the thermostat must
be allowed to stabilize at room tempera-
ture for a minimum of 30 minutes for
properoperation.Seeinstallationinstruc-
tions on pages 16 and 17 of this manual.
GWMS2 WALL
MOUNTED SWITCH
(OPTIONAL)
Makesure the heaterswitch is onAUTO.
This wall switch works just like the con-
ventional light switch. Flip the switch up
for on and down for off.
Note: Make sure thatthisswitch is notin
apositiontobemistakenforalightswitch.
This may result in the heater being inad-
vertently turned on without the proper
precautions being taken. See installation
instructions on page 17 of this manual.
OPERATING BLOWER
Auto/Off/On Switch
Thisblowerhasthreesettings:ON,OFF,
andAUTO.IntheONposition,theblower
will operate constantly. In the OFF posi-
tion, the blower will not operate. In the
AUTOposition,theblowerwillstartwhen
thethermostatsensesasufficientincrease
in firebox temperature.
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.Aftertheheatermodulatestothepilot
position, the blower will continue to run.
The blower will shut off after the firebox
temperature decreases.
Note: Itissafetooperatefireplacewith
blowerturnedoff.However,theblower
helps distribute heated air from the
fireplace.
Figure 40 - Auto/Off/On Switch
IMPORTANT: This remote control
hasbeen specially engineeredto take
an air temperature sample every 5.5
minutes in the auto mode. It will not
respondimmediatelyto thetempera-
turesettingbeing turnedupor down.
IMPORTANT: Thehand-held remote
control unit must be near the heater.
Do not keep the hand-held remote
control unit too close to the heater.
The thermostat on the hand-held re-
mote control unit will heat up too
quickly and turn the heater off.
3. To turn the burner off, press the
AUTO/ON/OFF button until OFF
lights. The pilot will remain lit.
IMPORTANT: To turn the pilot off,
manuallyturnthecontrolknobonthe
heater to the OFF position.
Increases Room
Temperature in
AUTO Mode
Shows
Temperature
Setting
Figure 39 - Thermostat Hand-Held
Remote Control Unit Selections
(GHRCTA Series Only)
The Log Heater
will Automatically
Cycle between
Pilot and the Heat
Setting that has
been Selected
Decreases
Room
Temperature
in AUTO
Mode
Turns Burners
On or Off and
Allows You to
Choose the
Auto Setting