Vanguard VI33NR Quick start guide

For more information, visit www.desatech.com
For more information, visit www.desatech.com
Save this manual for future reference.
Save this manual for future reference.
UNVENTED (VENT-FREE)
GAS FIREPLACE INSERT
OWNER’S OPERATION AND
INSTALLATION MANUAL
®
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result caus-
ing property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable
vaporsandliquidsinthevicinityofthisoranyother
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Donot touchany electricalswitch; donot useany
phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s in-
structions.
• If you cannot reach your gas supplier, call the fire
department.
— Installationandservicemustbeperformedbyaquali-
fied installer, service agency, or the gas supplier.
WARNING: Improper installation,
adjustment, alteration, service, or
maintenance can cause injury or
property damage. Refer to this
manualforcorrectinstallationand
operationalprocedures.Forassis-
tance or additional information
consult a qualified installer, ser-
vice agency, or the gas supplier.
WARNING: This is an unvented
gas-fired heater. It uses air (oxy-
gen) 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 sec-
tion on page 4 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 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
VI33NR
VI33PR
REMOTE READY
GAS FIREPLACE
INSERT Shown with GS38
Surround Kit and
G8010 Brick Liner
Accessories
Patent Pending

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
2
SAFETY INFORMATION
WARNINGS
WARNING:Thisproductcontainsand/orgenerates
chemicals known to the State of California to cause
cancer or birth defects, or other reproductive harm.
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
youhavethesesigns,thefireplaceinsertmaynotbeworkingproperly.
Get fresh air at once! Have fireplace insert 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 insert.
IMPORTANT: Read this owner’s manual carefully and
completelybeforetryingtoassemble,operate,orservice
this fireplace insert. Improper use of this fireplace insert
can cause serious injury or death from burns, fire, explo-
sion, electrical shock, and carbon monoxide poisoning.
WARNING: Any change to this heater or its
controls can be dangerous.
WARNING: Do notallow fans toblow directlyinto
thefireplaceinsert.Avoidanydrafts 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, fireplace hood, 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
neartheappliance.Neverplaceanyobjectsontheheater.
Fireplace insert front and screen becomes very hot
whenrunningfireplaceinsert.Keepchildrenandadults
away from hot surfaces to avoid burns or clothing
ignition.Fireplaceinsertwillremainhotforatimeafter
shutdown. Allow surfaces to cool before touching.
Keepthe appliance areaclearand free fromcombus-
tiblematerials,gasoline,andotherflammablevapors
and liquids.
WARNING: Any outside air ducts and/or ash
dumps in the fireplace must be permanently closed
before installing fireplace insert.
WARNING: Before installing in a solid fuel burn-
ing fireplace, the chimney flue and fireplace must be
cleaned of soot, creosote, ashes, and loose paint by
a qualified chimney cleaner.
TABLE OF CONTENTS
SAFETY INFORMATION
TABLE OF CONTENTS
SAFETY INFORMATION ............................................................ 2
PRODUCT IDENTIFICATION ..................................................... 3
LOCAL CODES........................................................................... 4
UNPACKING ............................................................................... 4
REMOTE CONTROLACCESSORIES ....................................... 4
PRODUCT FEATURES .............................................................. 4
AIR FOR COMBUSTION AND VENTILATION ........................... 4
INSTALLATION ........................................................................... 7
OPERATING FIREPLACE INSERT .......................................... 16
INSPECTING BURNERS.......................................................... 18
CLEANING AND MAINTENANCE ............................................ 19
WIRING DIAGRAMS................................................................. 20
SPECIFICATIONS .................................................................... 20
TROUBLESHOOTING .............................................................. 21
ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 24
ACCESSORIES ........................................................................ 28
OWNER’S REGISTRATION FORM.......................................... 29
REPLACEMENT PARTS .......................................................... 31
TECHNICAL SERVICE ............................................................. 31
SERVICE HINTS....................................................................... 31
WARRANTY INFORMATION...................................... Back Cover

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
3
3
SAFETY INFORMATION
PRODUCT IDENTIFICATION
Carefully supervise young children when they are in
the room with fireplace. When using the hand-held
remote accessory, keep selector switch in the OFF
position to prevent children from turning on burners
with remote.
You must operate this fireplace insert with the fire-
place insert screen and hood in place. Make sure
fireplace insert screen and hood are in place before
running fireplace insert.
SAFETY INFORMATION
Continued
1. This appliance is only for use with the type of gas indicated on
the rating plate. This appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s) inside any structure. Lo-
catepropane/LP supplytank(s) outdoors(propane/LP unitsonly).
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 insert shall not be installed in a bedroom or bathroom.
5. Do not use this fireplace insert as a wood-burning fireplace.
Use only the logs provided with the fireplace insert.
6. Do not add extra logs or ornaments such as pine cones, ver-
miculite,orrockwool.Usingtheseaddeditemscan cause soot-
ing. Do not add lava rock around base. Rock and debris could
fall into the control area of fireplace insert.
7. This fireplace insert is designed to be smokeless. If logs ever ap-
pear to smoke, turn off fireplace insert and call a qualified service
person. Note: During initial operation, slight smoking could oc-
cur due to log curing and burning of manufacturing residues.
8. To prevent thecreationofsoot, follow the instructions inClean-
ing and Maintenance, page 19.
9. Before using furniture polish, wax, carpet cleaner, or similar
products, turn heater off. If heated, the vapors from these prod-
ucts may create a white powder residue within burner box or
on adjacent walls or furniture.
10. This fireplace insert needs fresh air ventilation to run properly.
This fireplace insert has an Oxygen Depletion Sensing (ODS)
safety shutoff system. The ODS shuts down the fireplace in-
sert if not enough fresh air is available. See Air for Combus-
tion and Ventilation, pages 4 through 6. If fireplace insert keeps
shutting off, see Troubleshooting, pages 21 through 23.
11. Do not run fireplace insert
• where flammable liquids or vapors are used or stored
• under dusty conditions
12. Do not use this fireplace insert to cook food or burn paper or
other objects.
13. Do not use fireplace insert if any part has been exposed to or
under water. Immediately call a qualified service technician to
inspect the fireplace insert and to replace any part of the con-
trol system and any gas control which has been under water.
14. Do not operate fireplace insert if any log is broken. Do not
operatefireplaceinsert if a log ischipped(dime-sizedor larger).
15. Turnfireplaceinsertoffandlet coolbeforeservicing.Onlyaquali-
fied service person should service and repair fireplace insert.
16. Operating fireplace insert above elevations of 4,500 feet could
cause pilot outage.
17. To prevent performance problems with propane/LP units, do
not use propane/LP fuel tanks of less than 100 lb. capacity
(propane/LP units only).
18. Provide adequate clearances around air openings.
PRODUCT IDENTIFICATION
Figure 1 - Log Base Assembly
Figure 2 - Fireplace Insert
Top Louver
Assembly
Firebox
Hood
Bottom
Louver Assembly
Screen
Assembly
Top Outer
Casing
Firebox
Support
Blower
Assembly
Gas
Line
Access
AUTO
ON
OFF
COOLER
WARMER
TEMP
O
F
F
P
I
L
O
T
O
N
H
I
L
O
One Piece
Log Set
Remote Selector
Switch (Optional)
Piezo
Ignitor
Optional
Remote
Control
Control
Knobs

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
4
LOCAL CODES
Install and use fireplace insert 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
UNPACKING
CAUTION: Do not remove the warning and in-
struction labels attached to the heater base assem-
bly. These markings contain important warranty and
safety information.
1. With utility knife, cut the carton all the way around above the
staples on the bottom tray. Lift the carton off the heater. Re-
move packing. Note: The hood is located in the packing on
the right hand side of the heater front. Lift the heater off the
bottom tray.
2. Locate two screws above top corners of the fireplace insert
screen. Remove and discard these screws. Lift fireplace insert
screen up and pull out to remove.
3. Remove protective packaging applied to logs, log base assem-
bly, and fireplace insert.
4. Remove fireplace insert hood from carton insert.
5. Check all itemsforanyshipping damage. If damaged, promptly
inform dealer where you bought fireplace insert.
REMOTE CONTROL
ACCESSORIES
There are four optional remote controls that can be purchased
separately for this fireplace insert:
• wall switch
• wall thermostat
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 28.
PRODUCT FEATURES
OPERATION
Thisvent-freefireplaceinsertiscleanburning.Itrequiresnooutside
venting. There is no heat loss out a vent or up a chimney. Heat is
generated by both realistic flames and glowing embers. When used
without the blower, the fireplace insert requires no electricity
making it ideal for emergency backup heat.
SAFETY DEVICE
This fireplace insert has a pilot with an Oxygen Depletion Sensing
(ODS)safetyshutoffsystem.TheODS/pilotisarequiredfeaturefor
vent-free room heaters. The ODS system shuts off the fireplace
insert if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This fireplace insert has a piezo ignitor. This system requires no
matches, batteries, or other sources to light fireplace insert.
BLOWER ASSEMBLY
This fireplace insert is equipped with a blower assembly. The
blower operates thermostatically and has a variable control. The
blower circulates heated air from the fireplace insert into the room.
Use of blower is optional.
AIR FOR COMBUSTION AND
VENTILATION
Today’s homes are built more energy efficient than ever. New
materials,increasedinsulation, and new constructionmethodshelp
reduce heat loss in homes. Home owners weather strip and caulk
aroundwindowsand doors to keepthecold air out andthewarm 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.
Exhaustfans,fireplaces,clothesdryers,andfuelburningappliances
drawairfromthehousetooperate.Youmustprovideadequatefresh
air for these appliances. This will insure proper venting of vented
fuel-burning appliances.
WARNING: This heater shall not be installed in a
confined space or unusually tight construction un-
less provisions are provided for adequate combus-
tion and ventilation air. Read the following instruc-
tionstoinsureproperfreshairforthisandotherfuel-
burning appliances in your home.
LOCAL CODES
UNPACKING
REMOTE CONTROL ACCESSORIES
PRODUCT FEATURES
AIR FOR COMBUSTION AND VENTILATION

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
5
5
PROVIDING ADEQUATE VENTILATION
The following are excerpts from National Fuel Gas Code ANSI
Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation.
All spaces in homes fall into one of the three following ventilation
classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 4 through 6 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 andceilings exposed to theoutside 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 win-
dows and doors and
c. caulking or sealants are applied to areas such as
joints around window and door frames,between sole
platesand 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 6 .
Ifyour home doesnotmeet allofthe three criteriaabove,
proceed to Determining Fresh-Air Flow for Fireplace
Location , column 2.
Confined and Unconfined Space
The National Fuel Gas Code ANSI Z223.1/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 m3per kw) of the aggregate input rating
of all appliances installed in that space and an unconfined space as
aspacewhosevolumeisnotlessthan50cubicfeetper1,000Btuper
hour (4.8 m3per 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
furnishedwith doors,are consideredapartofthe unconfinedspace.
* Adjoining rooms are communicating only if there are doorless
passageways or ventilation grills between them.
AIR FOR COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR
HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Usethisworksheetto determine if you have aconfinedorunconfinedspace.
Space:Includestheroominwhichyouwillinstallheaterplusanyadjoining
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 22 ft. (length) x 18 ft. (width) x 8 ft. (ceiling
height) = 3168 cu. ft. (volume of space)
Ifadditionalventilationtoadjoiningroomis supplied with grills oropen-
ings, add the volume of these rooms to the total volume of the space.
2. Multiply the space volume by 20 to determine the maximum Btu/Hr
the space can support.
__________ (volume of space) x 20 = (Maximum Btu/Hr the space
can support)
Example: 3168 cu. ft. (volume of space) x 20 = 63,360 (maximum
Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater _____________ 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 com-
bustion air from the outdoors and vents to the outdoors.
Example:
Gas water heater _____________ Btu/Hr
Vent-free heater + _____________ Btu/Hr
Total = _____________ Btu/Hr
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: 63,360 Btu/Hr (maximum the space can support)
73,000 Btu/Hr (actual amount of Btu/Hr used)
40,000
33,000
73,000
AIR FOR COMBUSTION AND VENTILATION
Providing Adequate Ventilation
Determining Fresh-Air Flow For Heater Location

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
6
WARNING: If the area in which the heater may be
operated is smaller than that defined as an uncon-
fined space or if the building is of unusually tight
construction,provideadequatecombustionandven-
tilation air by one of the methods described in the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 Sec-
tion 5.3 or applicable local codes .
The space in the example on page 5 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
roomor add ventilationgrills betweenrooms.See VentilationAir From
Inside Building.
B. Vent room directly to the outdoors. See Ventilation Air From Out-
doors.
C. Installa lowerBtu/Hr heater, if lower Btu/Hr sizemakes roomunconfined.
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.
AIR FOR COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining unconfined space.
When ventilating to an adjoining unconfined space, you must
provide two permanent openings: one within 12" of the ceiling and
one within 12" of the floor on the wall connecting the two spaces
(see options 1 and 2, Figure 3). You can also remove door into
adjoining room (see option 3, Figure 3). Follow the National Fuel
Gas Code ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion
and Ventilation for required size of ventilation grills or ducts.
Ventilation Air From Outdoors
Provideextrafreshairbyusingventilationgrillsorducts.Youmust
provide two permanent openings: one within 12" of the ceiling and
one within 12" of the floor. Connect these items directly to the
outdoorsorspacesopentotheoutdoors.Thesespacesincludeattics
andcrawlspaces.FollowtheNationalFuelGasCodeANSIZ223.1/
NFPA 54, Section 5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet or outlet air into
attic if attic has a thermostat-controlled power vent. Heated air
enteringtheattic will activatethepower vent. Any outsideairducts
and/orash dumps inthefireplace shall bepermanently closed atthe
time of appliance installation.
Figure 4 - Ventilation Air from Outdoors
Figure 3 - Ventilation Air from Inside Building
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
Into Adjoining
Room,
Option 1
12"
12"
Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
AIR FOR COMBUSTION AND VENTILATION
Determining Fresh-Air Flow For Heater Location (Cont.)
Ventilation Air

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
7
7
INSTALLATION
CAUTION: This fireplace insert creates warm air
currents. These currents move heat to wall surfaces
nexttofireplaceinsert.Installingfireplaceinsertnext
to vinyl or cloth wall coverings or operating fireplace
insert where impurities (such as, but not limited to,
tobaccosmoke,aromaticcandles,cleaningfluids,oil
or kerosene lamps, etc.) in the air exist, may discolor
walls or cause odors.
WARNING: A qualified service person must in-
stall fireplace insert. Follow all local codes.
WARNING: Never install the fireplace insert
•in a bedroom or bathroom
•in a recreational vehicle
•where curtains, furniture, clothing, or other flam-
mable objects are less than 42 inches from the
front, top, or sides of the fireplace insert
•in high traffic areas
•in windy or drafty areas
NOTICE: This heater is intended for use as supple-
mental 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
throughoutthehouse.Intheeventofapoweroutage,
you can use this heater as your primary heat source.
WARNING: Before installing in a solid fuel burn-
ing fireplace, the chimney flue and firebox must be
cleaned of soot, creosote, ashes, and loose paint by
a qualified chimney cleaner.
Note: Your Vanguard fireplaceinsertis designedtobe used inzero
clearance installations. Wall or framing material can be placed
directlyagainstanyexteriorsurfaceontherear,sides,ortopofyour
fireplace insert, except where standoff spacers are integrally at-
tached. If standoff spacers are attached to your insert, these spacers
can be placed directly against wall or framing materials.
IMPORTANT: Vent-freeheatersadd moisture to theair.Although
this is beneficial, installing fireplace in rooms without enough
ventilation air may cause mildew to form from too much moisture.
See Air for Combustion and Ventilation, pages 4 through 6.
IMPORTANT: Make sure the fireplace insert is level. If fireplace
insert is not level, log set will not work properly.
CAUTION: Close masonry fireplace damper se-
curely before installing fireplace insert. If chimney
doesnothaveadamper,blockorcaptopofchimney.
Failure to cap an open chimney could cause drafts
thatcanaffecttheheater’sperformanceandincrease
surface temperatures.
INSTALLING SURROUND KIT (GS38 OR GS43)
CAUTION:AGS38orGS43surroundkitaccessory
mustbeinstalledonthisfireplaceinsertbeforeinstall-
ing into your masonry fireplace or wall opening.
Note: Use the accessory which best covers the existing masonry
fireplace opening or wall opening.
• Model GS38 Surround Kit (for use with fireplaces with an open-
ing smaller than 30" H and 38" W)
• Model GS43 Surround Kit (for use with fireplaces with an open-
ing 30" to 36 3/4" H and 38" to 43" W)
1. Using a 5/16" nut driver, remove two shoulder screws and
screen (see Figure 5). Remove 5/16" screen mounting shoul-
der screws (do not discard).
2. Remove log packaging from firebox cavity.
Shoulder
Screw Screen
Mounting
Shoulder
Screw (4)
Figure 5 - Removing Screws and Screen
INSTALLATION
Check Gas Type
Electrical Hookup
Installing Surround Kit (GS38 or GS43)
CHECK GAS TYPE
Usethe correctgas type(naturalorpropane/LP)foryourunit. Ifyour
gas supply is not correct, do not install fireplace insert. Call dealer
where you bought fireplace insert for proper type fireplace insert.
ELECTRICAL HOOKUP
(Blower Accessory)
This fireplace insert includes a blower assembly with an electrical
cord. The electrical cord is five feet in length. You must locate
fireplaceinsertwithinreachofa120voltgroundedelectricaloutlet.
If not, install and properly ground GA3555, three-prong 120 volt
electrical outlet, in fireplace insert. Follow instructions included in
kit (see Accessories, page 28).

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
8
Surround Side
5/16" Screws
Phillips
Screws
Figure 6 - Attaching Left Surround Side Panel
3. Align holes in left surround side panel with screen mounting
screw holes. Replace 5/16" screen mounting shoulder screws
removedinstep1(seeFigure6).Donottighten.InstallPhillips
screws in bottom (see Figure 6). Repeat for right side.
4. Using Phillips screwdriver, remove four screws attaching brass
louver. Install one Phillips head screw (included with kit) in
each side (see Figure 7).
5. Align top panel screw holes. Install four Phillips screws, do
not tighten.
6. For model GS43, align six screw holes in side panels with holes
in top panel (see Figure 9). For model GS38, align two screw
holes in side panels with holes in top panel (see Figure 9). Insert
and tighten screws.
7. Carefullyinspectfireplacesurroundassembly.Makesureeachpart
fits properly. Firmly tighten all screws installed during assembly.
CAUTION: Do not overtighten. Metal can bend,
warp, or break under excessive strain.
8. Remove three pieces of brass trim from packaging.
9. Locate four brass screws, two adjusting plates with set screws,
and two shims in the brass hardware packet.
10. Align shim under adjusting plate as shown in Figure 10, page 9.
11. Slide one end of adjusting plate/shim in slot of top brass trim
(see Figure 10, page 9).
12. Slide other end of adjusting plate/shim in slot on mitered edge
of side brass trim (see Figure 10, page 9).
13. While firmly holding edges of brass trim together, tighten both
set screws on the adjusting plate with slotted screwdriver.
14. Repeat for other side.
15. Line up holes in brass trim with holes on side panels of fire-
place surround assembly. Attach with brass-plated screws.
16. Move fireplace insert and surround assembly to masonry fire-
place opening. Make sure fireplace insert and surround assem-
bly fit properly.
Figure 7 - Remove Brass Louver
Brass
Louver
Phillips Screws
Top Surround
Panel Louver Screw Holes
Figure 8 - Attaching Top Surround Panel
Phillips
Screws (4)
INSTALLATION
Continued
Figure 9 - Attaching Side Panels to Top Panel (GS43 Pictured)
Top Panel
Side Panel
AIR FOR COMBUSTION AND VENTILATION
Installing Surround Kit (GS38 or GS43) (Cont.)

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
9
9
Top Brass Trim
Side Brass
Trim
Set Screws
Adjusting
Plate
Shim
Figure 10 - Assembling Brass Trim
Slot
Slot Mitered
Edge
INSTALLATION
Continued
Figure 11 - Installing Hood to Firebox
INSTALLING HOOD
Install hood to top of firebox as shown in Figure 11. Use 7 Phillips
screws provided.
Screws
INSTALLATION CLEARANCES
WARNING: Maintain the minimum clearances. If
you can, provide greater clearances from floor, ceil-
ing, and adjoining wall.
Carefully follow the instructions below. This will ensure safe
installation.
Minimum Clearances For Side Combustible
Material, Side Wall, and Ceiling
A. Clearances from the side of the fireplace cabinet to any com-
bustible material and wall should follow diagram in Figure 12.
Example: The face of a mantel, bookshelf, etc. is made of
combustible material and protrudes 3 1/2" from the wall. This
combustible material must be 4" from the side of the fireplace
opening (see Figure 12).
B. Clearances from the top of the fireplace opening to the ceiling
should not be less than 42 inches.
Figure 12 - Minimum Clearance for Combustible to Wall
*Minimum 16 inches from Side Wall
*
Example
FIREPLACE INSERT INSTALLATION INTO
MASONRY FIREPLACE
Installation of this fireplace insert involves installing fireplace insert
into an existing masonry fireplace. If using a mantel above the
fireplace,youmustfollowtheclearancesshowninFigure14.Follow
the instructions below to install the fireplace insert in this manner.
Minimum
Insert Fireplace Opening
Height 25 9/16" 26 1/4"
Front Width 34 5/16" 35"
Depth 16 11/16" 17 1/4"
1. Use dimensions shown in Figure 13 for the masonry fireplace
opening.
2. Install and properlygroundGA3555,three-prong 120 volt elec-
trical outlet, in fireplace insert. Follow instructions included
in kit (see Accessories, page 28).
3. Install gas pipingtofireplace 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. See Installing Gas Piping
to Fireplace Location, page 11.
4. Carefully set fireplace insert in front of masonry fireplace with
back of insert inside wall opening.
5. Attach flexible gas line to gas supply. See Connecting Fire-
place Insert to Gas Supply, pages 11 and 12.
6. Plug electrical cord into electrical outlet installed in step 2.
7. Carefully place fireplace insert into masonry fireplace.
35"
17
1
/ 4 "
26
1
/ 4 "
Figure 13 - Rough Opening for Installing in Masonry Fireplace
INSTALLATION
Installing Surround Kit (GS38 or GS43) (Cont.)
Installing Hood
Installation Clearances
Fireplace Insert Installation Into Masonry Fireplace

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
10
Supplied Hood Must
Be Used at All Times
Wire-mesh
Screen
Fireplace Noncombustible
Material May
Project Off this
Surface above
the Insert Hood
Mantel Shelf
13" 16" 19" 21"
2
1/2
"
6"
8"
10"
;
;
;
Fireplace Insert
Note: All vertical
measurements are
from top of insert hood
opening to bottom
of mantel shelf.
Wall board or facing
material (above
fireplace) may be of
combustible material,
including decorative
mantel ornaments or
other similar projec-
tions off of the facing
material.
Figure 14 - Minimum Mantel Clearances for Fireplace Insert
Installation
8. Check all gas connections for leaks. See Checking Gas Con-
nections, pages 12 and 13.
9. Install brass trim after final finishing and/or painting of wall
(see Figure 11, page 9).
INSTALLATION
Continued
FIREPLACE INSERT INSTALLATION INTO
FRAMED-IN ENCLOSURE
Installation of this fireplace insert involves installing fireplace insert
intoa framed-in enclosure. Ifusinga mantelabove the fireplace,you
must follow the clearances shown in Figure 14. Follow these instruc-
tions to install the fireplace insert in this manner.
Insert Framing
Height 25 9/16" 26 1/4"
Front Width 34 5/16" 35"
Depth 16 11/16" 17 1/4"
1. Frame in rough opening. Use dimensions shown in Figure 15
for the rough opening.
2. Install and properly ground GA3555, three-prong 120 volt elec-
tricaloutlet,in fireplace insert. Follow instructionsincludedinkit
(see Accessories, page 28).
3. Install gas piping into fireplace location. This installation in-
cludes 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. See Installing Gas
Piping to Fireplace Location, page 11.
4. Carefully set fireplace insert in front of rough opening with
back of insert inside wall opening.
5. Carefully set fireplace insert into rough opening.
6. Attach flexible gas line to gas supply. See Connecting Fire-
place Insert to Gas Supply, page 11.
7. Attach fireplace to wall studs using nails or wood screws
through holes in nailing flange (see Figure 16).
8. Check all gas connections for leaks. See Checking Gas Con-
nections, page 13.
9. Install surround kit. See Installing Surround Kit (GS38 or
GS43), pages 7 through 9.
35"
17 1/4"
26 1/4"
Figure 15 - Rough Opening for Installing in Wall
Figure 16 - Attaching Fireplace Insert to Wall Studs
Nails or
Wood
Screws
Nailing
Flanges
INSTALLATION
Fireplace Insert Installation Into Masonry Fireplace (Cont.)
Fireplace Insert Installation Into Framed-In Enclosure

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
11
11
INSTALLATION
Continued
NOTICE: If your installation does not meet the mini-
mum clearances shown, you must do one of the
following:
•raise the mantel to an acceptable height
•remove the mantel
Mantel Clearances for Insert Installation
If there is a mantel above masonry fireplace, you must meet
minimum clearance between mantel shelf and top of fireplace
opening.
NOTICE:Surface temperatures ofadjacentwalls 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 requirements of the national product standard.
Followallminimumclearancesshowninthismanual.
INSTALLING GAS PIPING TO FIREPLACE
LOCATION
Installation Items Needed
Before installing fireplace insert, 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 *
• sediment trap
• tee joint
• pipe wrench
• approved flexible gas line with gas connector (if allowed by lo-
cal codes) (not provided)
WARNING: A qualified service person must con-
nect fireplace Insert to gas supply. Follow all local
codes.
WARNING: Never connect natural gas fireplace
insert to private (non-utility) gas wells. This gas is
commonly known as wellhead gas.
CAUTION: Use only new, black iron or steel pipe.
Internally-tinned copper tubing may be used in cer-
tain areas. Check your local codes. Use pipe of 1/2"
diameter or greater to allow proper gas volume to
fireplace insert. If pipe is too small, undue loss of
volume will occur.
WARNING: Use pipe jointsealantthat is resistant
to liquid petroleum (LP) gas.
CONNECTING FIREPLACE INSERT TO GAS
SUPPLY
Installationmustincludeanequipmentshutoffvalve,andplugged1/8"
NPTtap.LocateNPTtapwithinreachfortestgaugehookup.NPTtap
must be upstream from fireplace insert (see Figure 18, page 12).
IMPORTANT: Install equipment shutoff valve in an accessible
location. The equipment shutoff valve is for turning on or shutting
off the gas to the appliance.
Checkyourbuildingcodesforanyspecialrequirementsforlocating
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.
INSTALLATION
Fireplace Insert Installation Into Framed-In Enclosure (Cont.)
Installing Gas Piping To Fireplace Location
Connecting Fireplace Insert To Gas Supply
CAUTION: Never connect propane/LP heater di-
rectlytothepropane/LPsupply.Thisheaterrequiresan
external regulator (not supplied). Install the external
regulator between the heater and propane/LP supply.
* A CSA design-certified equipment shutoff valve with 1/8" NPT
tap is an acceptable alternative to test gauge connection. Purchase
the optional CSA design-certified equipment shutoff valve from
your dealer. See Accessories, page 28.
For propane/LP units,the installer must supply an external regula-
tor.Theexternalregulatorwillreduceincominggaspressure.You
mustreduceincoming gaspressuretobetween11and14inchesof
water.Ifyoudonotreduceincominggaspressure,heaterregulator
damage could occur. Install external regulator with the vent
pointing down as shown in Figure 17. Pointing the vent down
protects it from freezing rain or sleet.
Figure 17 - External Regulator with Vent Pointing Down
Propane/LP
Supply
Tank
External
Regulator
Vent
Pointing
Down

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
12
Installation Items Needed
• 5/16" hex socket wrench or nut-driver
• Phillips screwdriver
• sealant (resistant to propane/LP gas, not provided)
1. Remove fireplace insert screen. Remove two screws that hold
fireplace insert screen in place for shipping. These screws are
located near top of screen. Discard screws. Lift fireplace in-
sert screen up and pull out to remove.
2. Remove screws that attach log base assembly to fireplace in-
sert (see Figure 19). Carefully lift up log base assembly and
remove from fireplace insert (see Figure 19).
Note: If adding the G8010 series brick liner accessory, install it
now. Follow instructions in G8010 accessory kit.
CAUTION: Do not pick up log base assembly by
burners. This could damage burners. Only handle
base by grates.
NOTICE: Most building codes do not permit con-
cealed gas connections. A flexible gas line is pro-
vided to allow accessibility from the fireplace (see
Figure20). The flexiblegassupply line connectionto
the equipment shutoff valve should be accessible.
3. Route gas supply line through access opening of fireplace in-
sert (see Figure 19).
4. Connect gas supply line to flexible gas line attached to gas
regulator of fireplace insert (see Figure 20). Use sealant on all
male pipe threads.
5. Check all gas connections for leaks. See Checking Gas Con-
nections, page 13.
6. Replace log base assemblybackintofireplaceinsert.Feed flex-
ible gas line into fireplace insert base area while replacing log
base assembly. Make sure the entire flexible gas line is in fire-
place insert base area. Reattach log base assembly to fireplace
insert with screws removed in step 2.
INSTALLATION
Continued
Figure19-RemovingLogBaseAssemblyFromFireplaceInsert
O
F
F
P
I
L
O
T
O
N
H
I
L
O
Burners
Two Screws
Log Base Assembly
Figure 20 - Attaching Flexible Gas Lines Together
Flexible Gas Line from
Fireplace Gas Regulator
Provided with Fireplace Insert
To Fireplace
Gas Regulator
Equipment
Shutoff Valve
➞
➞
Propane/LP
To External
Regulator
Natural
To Gas
Meter
We recommend that you install a sediment trap in supply line as
showninFigure 18.Locate sedimenttrapwhere itiswithin reachfor
cleaning. Install in piping system between fuel supply and heater.
Locate sediment trap where trapped matter is not likely to freeze. A
sediment trap traps moisture and contaminants. This keeps them
from going into fireplace insert gas controls. If sediment trap is not
installed or is installed wrong, fireplace may not run properly.
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Supplied Flexible
Gas Line
3" Minimum
Propane/LP
From External
Regulator (11"
W.C. to 14" W.C.
Pressure)
Natural
From Gas
Meter (5" W.C.
to 10.5" W.C.
Pressure)
Cap Pipe Tee
Nipple Joint
Sediment Trap
Figure 18 - Gas Connection
* Purchase the optional CSA design-certified equipment shutoff
valve from your dealer. See Accessories, page 28.
INSTALLATION
Connecting Fireplace Insert To Gas Supply (Cont.)
Gas Line
Access

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
13
13
INSTALLATION
Continued
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
aleak.Applyanoncorrosiveleakdetectionfluidtoall
joints.Bubblesformingshowaleak.Correctallleaks
at once.
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 (con-
trol valve) and equipment shutoff valve from gas supply pip-
ing system. Pressures in excess of 1/2 psig will damage fire-
place insert gas 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 for propane/LP gas or opening main gas valve lo-
cated on or near gas meter or using compressed air.
4. Check all joints of gas supply piping system.Apply a noncorrosive
leak detection fluid to all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect fireplace insert 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 21).
2. Pressurize supply piping system by either opening propane/LP
supply tank for propane/LP gas or opening main gas valve lo-
cated on or near gas meter or using compressed air.
3. Check all joints from gas meter to equipment shutoff valve for
natural gas (see Figure 22), or propane/LP supply to equip-
ment shutoff valve for propane/LP (see Figure 23). Apply a
noncorrosive leak detection fluid to all joints. Bubbles form-
ing show a leak.
4. Correct all leaks at once.
Pressure Testing Fireplace Insert Gas
Connections
1. Open equipment shutoff valve (see Figure 21).
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 insert is in the OFF position.
4. Check all joints from gas meter to equipment shutoff valve for
natural gas (see Figure 22), or propane/LP supply to equip-
ment shutoff valve for propane/LP (see Figure 23). Apply a
noncorrosive leak detection fluid to all joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Light fireplace insert (see Operating Fireplace Insert, pages
16 through 18). Check all other internal joints for leaks.
7. Turn off fireplace insert (see To Turn Off Gas to Appliance,
page 17).
Figure 21 - Equipment Shutoff Valve
Equipment
Shutoff
Valve
ON
POSITION
OFF
POSITION
Open
Closed
Equipment
Shutoff Valve
Gas
Meter
Figure 22 - Checking Gas Joints (natural gas)
Manual Gas Valve
INSTALLATION
Checking Gas Connections
Figure 23 - Checking Gas Joints (propane/LP gas)
Equipment Shutoff
Valve Propane/LP
Supply Tank
Manual Gas Valve

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
14
WARNING: You must operate this fireplace in-
sert with the fireplace insert screen in place. Make
sure fireplace insert screen is in place before run-
ning fireplace insert.
Figure 25 - Installing One Piece Log Set (Top View)
Figure 26 - Installing Fireplace Insert Screen
Notches
Screws for
Mounting
Screen
One Piece Log Set
Burner
Ports
2. Install fireplace insert screen by slipping notches of fireplace
insert screen over screws on front of fireplace insert (see Fig-
ure 26).
INSTALLATION
Continued
WARNING:Afterinstallationandperiodicallythere-
after, check to ensure that no flame comes in contact
with any log. With the heater set to High, check to see
ifflamescontactanylog.Ifso,repositionlogsaccord-
ing to the log installation instructions in this manual.
Flames contacting logs will create soot.
It is very important to install the logs exactly as instructed. Do not
modify logs. Only use logs supplied with heater.
1. Place one-piece log set on grate to fit as illustrated in Figure 24.
Make sure middle section at bottom of log set is seated into
"U"-shaped cutout in center of chassis (see Figure 25).
IMPORTANT: Make sure log does not cover any burner ports.
WARNING: Failure to position the parts in accor-
dancewiththesediagramsorfailuretouseonlyparts
specifically approved with this heater may result in
property damage or personal injury.
INSTALLING LOGS
CAUTION: Do not remove the warning and in-
struction labels attached to the heater base assem-
bly. These markings contain important warranty and
safety information.
Figure 24 - Installing One Piece Log Set
O
F
F
P
I
L
O
T
O
N
H
I
L
O
Chassis "U"-shaped
Cutout in
Chassis
One Piece
Log Set
Burner
Middle Section
at Bottom of
Log Set
INSTALLATION
Installing Logs

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
15
15
INSTALLATION
Continued
Figure 27 - Switch Plate and Wiring Harness
Screw
Switch
Plate
Wires
Figure 28 - Installing Remote Receiver
Figure 29 - Connecting Wires
Red Wire
From
Receiver
Valve
White Wire
From
Receiver
Remote Receiver
Mounting
Clips
Remote Switch
Bracket Ignitor
INSTALLING 9-VOLT BATTERIES
Two 9-volt batteries (not included) are required to operate this
heater with the wireless hand-held remote control set. Install one
batteryinthereceiverandone in the hand-held remote control unit.
Note: Only use alkaline batteries.
Figure 30 - Installing Battery in Remote Receiver
Battery Clip
9-Volt
Battery Terminal
Wires
Remote
Receiver
Installing 9-Volt Battery (Not Included) in Hand-
Held Remote Control Unit
1. Remove battery cover on back of remote control unit.
2. Attach terminal wires to the battery. Place battery into the bat-
tery housing.
3. Replace battery cover onto remote control unit.
Figure31 -InstallingBattery inHand-HeldRemote ControlUnit
(GHRC Series)
Battery
Cover
9-Volt
Battery
Terminal
Wires
Remote
Control Unit
Battery
Housing
Figure 32 - Installing Battery in Hand-Held Remote Control Unit
(GHRCTA Series)
9-Volt
Battery
INSTALLATION
Optional Wireless Hand-Held Remote Control Accessories (GHRC and GHRCTA)
Installing 9-volt Batteries
Remote
Control
Unit
Battery
Cover
Terminal
Wires
OPTIONAL WIRELESS HAND-HELD REMOTE
CONTROL ACCESSORIES (GHRC and GHRCTA)
Installing Remote Receiver Unit
1. Disconnect switch wires from the control valve.
2. Remove screws attaching switch plate.
3. Remove switch plate (see Figure 27). Discard after removing.
4. Install remote receiver unit onto gas log heater base using
mounting clips.
5. Push clips firmly into place (see Figure 28).
6. Connect wires as shown in Figure 29.
Installing 9-Volt Battery (Not Included) in Receiver
1. Locate back of receiver under front burner of heater.
2. Locate the battery clip mounted on the back of the receiver.
3. Slide a 9-volt battery through the clip.
4. Attach the terminal wires to the battery.

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
16
LIGHTING
INSTRUCTIONS
WARNING: You must operate this heater with the
fireplace insert screen in place. Make sure fireplace
insertscreenisinstalledbeforerunningfireplaceinsert.
NOTICE: During initial operation of new fireplace
insert, burning logs will give off a paper-burning
smell.Opendamperorwindowtoventsmell.Thiswill
only last a few hours.
1. STOP! Read the safety information above.
2. Make sure equipment shutoff valve is fully open.
3. Set switch to OFF position.
WARNING: Burners will come on automatically
withinoneminutewhentheremoteselectorswitchis
in the ON position after the pilot is lit.
CAUTION: Do not try to adjust heating levels by
using the equipment shutoff valve.
4. Press in and turn control knob clockwise to the
OFF position.
5. Wait five (5) minutes to clear out any gas. Then smell for
gas, including near the floor. If you smell gas, STOP! Fol-
low “B” in the safety information in column 1. If you don’t
smell gas, go to the next step.
6. Press in and turn control knob counterclockwise
to the PILOT position. Press in control knob for five (5)
seconds (see Figure 33).
Note: You may be running this heater 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 al-
low air to bleed from the gas system.
7. With control knob pressed in, press and release ignitor but-
ton. This will light pilot. The pilot is attached to the front
burner.Ifneeded,keeppressingignitorbuttonuntilpilotlights.
Note: If pilot does not stay lit, contact a qualified service
person or gas supplier for repairs. Until repairs are made,
lightpilotwithmatch.To light pilotwithmatch,seeManual
Lighting Procedure on page 17.
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 pilot goes out, repeat steps 4 through 8.
9. Slightly push in and turn control knob counterclockwise
to the ON position.
10. Wait one minuteandswitch selector switch to theONposi-
tion to light burners.
11. Set flame adjustment knob to any level between HI and LO.
O
F
F
P
I
L
O
T
O
N
L
O
I
H
AUTO
OFF
ON
Figure33-ControlKnobandIgnitorButtonLocation(Shownas
Supplied, No Control Options)
Control Knob
Ignitor
Button
Flame Adjustment
Knob Selector Switch
OPERATING FIREPLACE
INSERT
WARNING:If youdonotfollowtheseinstructions
exactly, a fire or explosion may result causing prop-
erty damage, personal injury or loss of life.
A. This appliance has a pilot which must be lighted by hand.
When lighting the pilot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the floor because some gas
is heavier than air and will settle on the floor.
WHAT TO DO IFYOU 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 de-
partment.
C. Useonly yourhand topushin or turn the gascontrolknob.
Never use tools. If the knob will not push in or turn by
hand, don’t try to repair it, call a qualified service techni-
cian 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.
FOR YOUR SAFETY READ
BEFORE LIGHTING
OPERATING FIREPLACE INSERT
For Your Safety Read Before Lighting
Lighting Instructions

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
17
17
OPERATING FIREPLACE
INSERT
Continued
WARNING:Makesuretheselectorswitchisinthe
OFF position when you are away from home for long
periods of time. Heater will come on automatically
with selector switch in the ON position.
Ignitor
Electrode
Pilot Burner
Figure 34 - Pilot
Natural Gas
TO TURN OFF GAS
TO APPLIANCE
MANUAL LIGHTING
PROCEDURE
1. Followsteps1through6underLightingInstructions,page16.
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 16.
Shutting Off Heater
1. Turn control knob clockwise to the OFF position.
2a. Set selector switch in the OFF position.
2b. If Using Optional Hand-Held Remote:Setremoteselector
switch in the OFF position to keep from draining battery.
Shutting Off Burners Only (pilot stays lit)
Youmay shutoffthe burnersandkeep thepilotlit bydoingone
of the following:
• Turn control knob clockwise to the PILOT position.
• Use remote control manual OFF button.
• Set remote selector switch in the OFF position.
1. After lighting, let pilot flame burn for about one minute.
Turn control knob to ON position. Adjust flame adjust-
mentknobanywherebetweenHIandLO.Slidetheremote
selector switch to the REMOTE position (see Figure 35,
page18). Note: Theburnersmay light if hand-heldremote
ON button was on when remote selector switch was last
turned off. You can now turn the burners on and off with
the hand-held remote control unit.
IMPORTANT : Do not leave the remote selector switch in
the REMOTE position when the pilot is not lit. This will
drain the battery.
IMPORTANT: Be sureto presstheON/OFFbuttonson the
hand-heldremotecontrol unit forup to 3 secondstoassure
proper operation.
GHRC Series Operation:
2a. Press the ON/OFF button to turn the 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 36, page 18).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.
• In theAUTO mode, the thermostat in the hand-held re-
moteunitcontrolsthe roomtemperature.To increasethe
roomtemperature,pressthe top arrowof theTEMPbut-
ton. To lower the room temperature, press the bottom
arrow of the TEMP button.At higher settings the heater
will run longer.
NOTICE: You must light the pilot before using the
hand-held remote control unit. See Lighting Instruc-
tions on page 16.
OPTIONAL REMOTE
OPERATION
Note: All remote control accessories must be purchased sepa-
rately (see Accessories, page 28). Follow instructions included
with the remote control.
Ignitor
Electrode
Pilot Burner
Propane/LP Gas
Thermostat Control Operation
(Optional GHRCTA Series Only) The thermostat control set-
ting on the remote control unit can be set to any comfort level
between WARMER and COOLER. The burners will turn on
and off automatically to maintain the comfort level you select.
The ideal comfort setting will vary by household depending
upontheamount ofspacetobe heated,theoutputof thecentral
heating system, etc.
Forwallthermostatoperation,followinstructionsuppliedwith
thermostat accessory GWMT1. For wall switch operation fol-
low instructions supplied with GWMS2.
OPERATING FIREPLACE INSERT
Lighting Instructions (Cont.)
To Turn Off Gas To Appliance
Manual Lighting Procedure
Optional Remote Operation

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
18
OPERATING FIREPLACE
INSERT
Continued
Locate the blower switch by opening lower louver on fireplace
insert. Blower switch is located at lower left inside louver door.
Thisthermostat-controlledblowerhasthreesettings:ON,OFF,
and AUTO. In the ON position, the blower will operate con-
stantly. In the OFF position, the blower will not operate. In the
AUTO position, the blower will start when the thermostat
senses a sufficient increase in firebox temperature.
OPTIONAL BLOWER
OPERATION
INSPECTING BURNERS
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 37 shows a correct pilot flame pattern. Figure 38 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 38
• turn heater off (see To Turn Off Gas to Appliance, page 17)
• see Troubleshooting, pages 21 through 23
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.
Figure 37 - Correct Pilot Flame Pattern
Pilot Burner Thermocouple
Figure 38 - Incorrect Pilot Flame Pattern
Pilot Burner Thermocouple
O
F
F
P
I
L
O
T
O
N
L
O
I
H
ON
OFF
REMOTE
Figure 35 - Setting the Remote Selector Switch, Control Knob,
and Flame Adjustment Knob for Remote Operation
Flame Adjustment Knob
Figure 36 - Thermostat Hand-Held Remote Control Unit
Selections (GHRCTA Series only)
Shows Temperature
Setting
The Log Heater will
Automatically Cycle
between Pilot and
the Heat Setting
that has been
Selected
IMPORTANT: Thisremotecontrolhasbeenspecially en-
gineeredtotakean air temperaturesample every5.5 min-
utes in the auto mode. It will not respond immediately to
the temperature setting being turned up or down.
IMPORTANT: The hand-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
thehand-heldremote controlunit willheatuptooquickly
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, manually turn the con-
trol knob on the heater to the OFF position.
Remote Selector Switch in Remote
Position (Optional Remote Control)
Control Knob in
On Position
Increases Room
Temperature in
AUTO Mode
Decreases Room
Temperature in
AUTO Mode
Turns Burners On
or Off and Allows
You to Choose the
Auto Setting
OPERATING FIREPLACE INSERT
Optional Remote Operation (Cont.)
Optional Blower Operation
INSPECTING BURNERS
Pilot Flame Pattern
Note: Yourgaslogsandthermostatblowerwillnotturnonand
off at the same time. The fireplace insert may run for several
minutesbeforethe blower turnson.Aftertheheatermodulates
tothepilotposition,theblowerwillcontinuetorun.Theblower
will shut off after the firebox temperature decreases.
Note: It is safe to operate fireplace insert with blower turned
off. However, the blower helps distribute heated air from the
fireplace insert.
Natural Gas Propane/LP Gas
Pilot Burner Thermocouple
Pilot Burner Thermocouple
Natural Gas Propane/LP Gas

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
19
19
BURNER FLAME PATTERN
Figure 39 shows a correct burner flame pattern. Figure 40 shows an
incorrect burner flame pattern. If burner flame pattern is incorrect,
• turn heater off (see To Turn Off Gas to Appliance, page 17)
• see Troubleshooting, pages 21 through 23
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in the fitting at the
burnerentrance. Theseholes maybecomeblockedwithdust orlint.
Periodically inspect these holes for any blockage and clean if
needed. Blocked air holes will create soot.
MAIN BURNER
Periodicallyinspectallburnerflameholeswiththeheaterrunning.All
slottedburner flame holesshould be openwithyellow flamepresent.
All round burner flame holes should be open with a small blue flame
present. Some burner flame holes may become blocked by debris or
rust,withnoflamepresent.Ifso,turnoffheaterandletcool.Remove
blockage, blocked burner flame holes will create soot.
Figure39 -Correct FlamePattern withControl KnobSet toHigh
Flame.
Figure 40 - Incorrect Flame Pattern with Control Knob Set to
High Flame
Approx. 3-6"
Above Top of
Logs
More Than
8" Above
Top of Logs
CLEANING AND
MAINTENANCE
WARNING: Turn off heater and let cool before
cleaning.
CAUTION: You must keep control areas, burner,
and circulating air passageways of heater clean. In-
spect these areas of heater before each use. Have
heater inspected yearly by a qualified service person.
Heatermayneedmorefrequentcleaningduetoexces-
sivelintfromcarpeting,pethair,beddingmaterial,etc.
CLEANING BURNER INJECTOR HOLDER
AND PILOT AIR INLET HOLE
Theprimaryairinletholesallowthe properamountofairtomixwith
the gas. This provides a clean burning flame. Keep these holes clear
of dust, dirt, lint, and pet hair. Clean these air inlet holes prior to each
heating season. Blocked air holes will create soot. We recommend
that you clean the unit every three months during operation and have
heater inspected yearly by a qualified service person.
We also recommend that you keep the burner tube and pilot
assembly clean and free of dust and dirt. To clean these parts we
recommendusingcompressedairnogreaterthan30PSI.Yourlocal
computer store, hardware store, or home center may carry com-
pressed air in a can. You can use a vacuum cleaner in the blow
position. If using compressed air in a can, please follow the direc-
tionsonthecan.Ifyoudon't followdirectionsonthecan, youcould
damage the pilot assembly.
1. Shut off the unit, including the pilot.Allow the unit to cool for
at least thirty minutes.
2. Inspect burner, pilot, and primary air inlet holes on injector
holder for dust and dirt (see Figure 41).
3. Blow air through the ports/slots and holes in the burner.
4. Check the injector holder located at the end of the burner tube
again. Remove any large particles of dust, dirt, lint, or pet hair
with a soft cloth or vacuum cleaner nozzle.
Figure 41 - Injector Holder On Outlet Burner Tube
Burner
Tube
INSPECTING BURNERS
Burner Flame Pattern
Burner Primary Air Holes
Main Burner
CLEANING AND MAINTENANCE
Cleaning Burner Injector Holder And Pilot Air Inlet Hole
INSPECTING BURNERS
Continued
Injector Holder
(May Be Brass or
Aluminum
Depending on
Model)
Primary Air Inlet Holes
(Shape of Holes May
Vary by Model)

111285-01A
For more information, visit www.desatech.com
For more information, visit www.desatech.com
20
CLEANING AND
MAINTENANCE
Continued
Figure 42 - Pilot Inlet Air Hole
5. Blow air into the primary air holes on the injector holder.
6. In case any large clumps of dust have now been pushed into
the burner repeat steps 3 and 4.
Clean the pilot assembly also. A yellow tip on the pilot flame
indicates dust and dirt in the pilot assembly. There is a small pilot
airinletholeabouttwoinchesfrom wherethepilotflamecomesout
ofthe pilot assembly(seeFigure 42).Withthe unitoff,lightly blow
airthroughtheairinlethole.Youmayblowthroughadrinkingstraw
if compressed air is not available.
Burner
Tube
Pilot
Assembly
Pilot Air
Inlet Hole
Ports/Slots
LOGS
• If you remove logs for cleaning, refer to Installing Logs, page
14, to properly replace logs.
• Replace log(s) if broken or chipped (dime-sized or larger).
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in the fitting at the
burnerentrance. Theseholes maybecomeblockedwithdust orlint.
Periodically inspect these holes for any blockage and clean if
needed. Blocked air holes will create soot.
MAIN BURNER
Periodicallyinspectallburnerflameholeswiththeheaterrunning.All
slottedburner flame holesshould be openwithyellow flamepresent.
All round burner flame holes should be open with a small blue flame
present. Some burner flame holes may become blocked by debris or
rust,withnoflamepresent.Ifso,turnoffheaterandletcool.Remove
blockage, blocked burner flame holes will create soot.
CLEANING AND MAINTENANCE
Cleaning Burner Injector Holder And Pilot Air Inlet Hole (Cont.)
Logs
Burner Primary Air Holes
Main Burner
WIRING DIAGRAMS
SPECIFICATIONS
WIRING DIAGRAMS
Note : For proper operation of optional accessories, the wires from
the switch to the control must be connected exactly as shown in
Figure 43.
AUTO
OFF
ON
Thermopile
Figure 43 - Switch Wiring Diagram
Red
Variable
Fan Switch Fan Switch
(N.O.)
Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off
12
Black Blue
Figure 44 - Blower Wiring Diagram
CAUTION: Label all wires prior to disconnection
when servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper
operation after servicing.
SPECIFICATIONS
VI33NR VI33PR
Btu (Variable) 20,000/30,000 20,000/30,000
Type Gas Natural Gas Only Propane/LP Only
Ignition Piezo Piezo
Pressure Manifold 3.5" W.C. 8.0" W.C.
Inlet Gas Pressure (in. of water)
Maximum 10.5" 14"
Minimum* 5" 11"
* For input adjustment