Vanguard Heating Electric Heater VMH3000TN User Manual

®
VENT-FREE NATURAL GAS  
MINI-HEARTH® HEATER  
OWNER’S OPERATION AND INSTALLATION MANUAL  
VMH3000TN  
15,000 to 30,000 Btu/Hr  
Shown With Optional  
Mantel Which Features  
a Built In Base  
with Thermostat  
WARNING:Improperinstalla-  
tion, adjustment, alteration,  
service, or maintenance can  
causeinjuryorpropertydam-  
age. Refer to this manual for  
correct installation and op-  
erational procedures. For as-  
sistance or additional infor-  
mation consult a qualified in-  
staller, service agency, or the  
gas supplier.  
WARNING:Iftheinformationinthismanualisnot  
followed exactly, a fire or explosion may result  
causing property damage, personal injury, or  
loss of life.  
— Do not store or use gasoline or other  
flammable vapors and liquids in the vicinity  
of this or any other appliance.  
— WHAT TO DO IF YOU SMELL GAS  
• Do not try to light any appliance.  
• Do not touch any electrical switch; do not  
use any phone in your building.  
• Immediately call your gas supplier from a  
neighbor’s phone. Follow the gas supplier’s  
instructions.  
WARNING:Thisisanunvented  
gas-fired heater. It uses air  
(oxygen) from the room in  
whichitisinstalled.Provisions  
for adequate combustion and  
ventilation air must be pro-  
vided. Refer to Air For Com-  
bustion and Ventilation sec-  
tion on page 5 of this manual.  
• If you cannot reach your gas supplier, call  
the fire department.  
— Installation and service must be performed  
byaqualifiedinstaller,serviceagency,orthe  
gas supplier.  
This appliance may be installed in an aftermarket*, permanently located, manufactured  
(mobile) home, where not prohibited by local codes.  
Thisapplianceisonlyforusewiththetypeofgasindicatedontheratingplate. Thisappliance  
is not convertible for use with other gases.  
*Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer  
Save this manual for future reference.  
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OWNER’S MANUAL  
Note: Do not remove  
Lighting and Warning  
Plates from heater  
PRODUCT  
ASSEMBLY  
ASSEMBLING HEATER  
IDENTIFICATION  
Control Knob  
Tools Required:  
Ignitor Button  
• Phillips screwdriver  
• 5/16" hex wrench  
• slotted screwdriver  
Lighting and  
Warning Plates  
Removing Front Panel Of Heater  
1. Remove two screws near bottom cor-  
ners of front panel with Phillips screw-  
driver.  
2. Pull bottom of front panel forward, then  
down (see Figure 2) .  
Heater  
Cabinet  
Screen  
Front  
Panel  
Log  
Figure 1 - Vent-Free Gas Log Propane/LP Gas Space Heater  
Figure2-RemovingFrontPanelofHeater  
PRODUCT  
FEATURES  
UNPACKING  
Installing Log  
Note: For easier installation, lay heater on  
its back.  
1. Remove log from inside top of heater.  
Discard protective packaging.  
2. Attach ignitor cable to piezo ignitor  
(see Figure 3).  
3. With Phillips screwdriver, remove four  
screws holding screen in place. Re-  
move screen.  
4. Gently slide log between log retaining  
brackets on deflector assembly (see Fig-  
ure 4, page 4). The log should fit firmly  
against bottom of log retaining brackets.  
5. Reattach screen using four screws re-  
CAUTION: Do not remove the  
metal data plates attached to the  
heater base assembly. The data  
platescontainimportantwarranty  
information.  
SAFETY DEVICE  
This heater has a pilot with an Oxygen  
Depletion Sensing (ODS) safety shutoff  
system. The ODS/pilot is a required feature  
for vent-free room heaters. The ODS/pilot  
shuts off the heater if there is not enough  
fresh air.  
1. Remove heater from carton.  
2. Remove all protective packaging ap-  
plied to heater for shipment.  
3. Make sure your heater includes two  
hardware packets.  
PIEZO IGNITION SYSTEM  
This heater has a piezo ignitor. This system  
requires no matches, batteries, or other  
sources to light heater.  
4. Check heater for any shipping damage.  
If heater is damaged, promptly inform  
dealer where you bought heater.  
moved in step 3.  
Piezo Ignitor  
THERMOSTATIC HEAT  
CONTROL  
This heater has a thermostat sensing bulb  
andacontrolvalve. Thisresultsinthegreat-  
est heater comfort. This can also result in  
lower gas bills.  
Ignitor  
Cable  
Figure3-AttachingIgnitorCabletoPiezo  
Ignitor  
Continued  
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NATURAL GAS RESIDENTIAL HEATERS  
5. Slide other end of adjusting plate/shim  
ASSEMBLY  
in slot on mitered edge of side brass  
trim (see Figure 6).  
Continued  
6. While firmly holding edges of brass  
trim together, tighten both set screws  
on the adjusting plate with slotted  
screwdriver.  
Log  
Heater Cabinet  
Deflector  
7. Repeat steps 1 through 6 for other side.  
8. Place the assembled trim on front of  
heater cabinet. Attach on top and sides  
with four brass screws included in hard-  
ware package (see Figure 7).  
Front Panel  
Log  
Retaining  
Brackets  
Screen  
9. Reattach front panel to heater if you are  
going to mount the heater to the base.  
Do not reattach front panel at this time  
if you are going to mount heater to wall.  
Truss-  
Head  
Screw  
Top Brass  
Trim  
Adjusting  
Plate  
Nut  
Side Brass  
Trim  
Set  
Screws  
Burner Shield  
Screw  
Brass Front Trim  
Screw  
Shim  
Figure 4 - Assembling Heater  
Slot  
Mitered Edge  
Brass Front  
Trim  
Front Panel  
Slot  
WARNING: Always have  
burnershieldandscreeninplace  
beforeoperatingheater.Thispre-  
ventsexcessivetemperatureson  
heater surfaces.  
Failure to position the parts in  
accordance with these diagrams  
or failure to use only parts spe-  
cificallyapprovedwiththisheater  
mayresultinpropertydamageor  
personal injury.  
Figure 6 - Assembling Brass Trim  
Screws  
Assembled  
Brass Trim  
Nut  
Truss-Head  
Screw  
Figure 5 - Attaching Brass Front Trim to  
Front Panel  
Attaching Brass Front Trim to  
Front Panel  
1. Locate brass front trim in brass trim  
package.  
Assembling and Attaching  
Brass Trim  
1. Remove packaging from remaining  
three pieces of brass trim.  
2. Slide the head of two truss-head screws  
from hardware packet into each end of  
brass front trim (see Figure 5).  
2. Locate four brass screws, two adjust-  
ing plates with set screws, and two  
shims in the hardware packet.  
Figure 7 - Attaching Brass Trim to Heater  
3. Line up screws with holes in front panel  
(see Figure 4). Insert screws in holes.  
Attach nuts from inside of front panel.  
Tighten with wrench.  
3. Align shim under adjusting plate as  
shown in Figure 5.  
4. Slide one end of adjusting plate/shim  
in slot on mitered edge of top brass trim  
(see Figure 6).  
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OWNER’S MANUAL  
Confined and Unconfined Space  
PROVIDING ADEQUATE  
VENTILATION  
AIR FOR  
The National Fuel Gas Code, ANS Z223.1  
defines a confined space as a space whose  
volume is less than 50 cubic feet per 1,000  
Btu per hour (4.8 m3 per kw) of the aggre-  
gate input rating of all appliances installed  
in that space and an unconfined space as a  
space whose volume is not less than 50  
cubic feet per 1,000 Btu per hour (4.8 m3 per  
kw) of the aggregate input rating of all  
appliances installed in that space. Rooms  
communicating directly with the space in  
whichtheappliancesareinstalled*,through  
openings not furnished with doors, are con-  
sidered a part of the unconfined space.  
COMBUSTION AND  
VENTILATION  
The following are excerpts from National  
Fuel Gas Code, NFPA 54/ANS Z223.1, Sec-  
tion5.3, AirforCombustionandVentilation.  
WARNING: This heater shall  
notbeinstalledinaconfinedspace  
or unusually tight construction  
unless provisions are provided  
foradequatecombustionandven-  
tilation air. Read the following in-  
structions to insure proper fresh  
air for this and other fuel-burning  
appliances in your home.  
All spaces in homes fall into one of the three  
following ventilation classifications:  
1. Unusually Tight Construction  
2. Unconfined Space  
3. Confined Space  
The information on pages 5 through 7 will  
help you classify your space and provide  
adequate ventilation.  
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.  
Unusually Tight Construction  
Today’s homes are built more energy effi-  
cient than ever. New materials, increased  
insulation, and new construction methods  
helpreduceheatlossinhomes.Homeowners  
weather strip and caulk around windows and  
doorstokeepthecoldairoutandthewarmair  
in. During heating months, home owners  
want their homes as airtight as possible.  
The air that leaks around doors and win-  
dows may provide enough fresh air for  
combustion and ventilation. However, in  
buildings of unusually tight construction,  
you must provide additional fresh air.  
* Adjoining rooms are communicating only  
iftherearedoorlesspassagewaysorventila-  
tion grills between them.  
Unusually tight construction is de-  
fined as construction where:  
While it is good to make your home energy  
efficient, your home needs to breathe. Fresh  
air must enter your home. All fuel-burning  
appliances need fresh air for proper com-  
bustion and ventilation.  
a. walls and ceilings exposed to the  
outside atmosphere have a con-  
tinuous water vapor retarder with  
a rating of one perm (6x10-11 kg  
per pa-sec-m2) or less with open-  
ings gasketed or sealed and  
Exhaustfans, fireplaces, clothesdryers, and  
fuel burning appliances draw air from the  
house to operate. You must provide ad-  
equate fresh air for these appliances. This  
will insure proper venting of vented fuel-  
burning appliances.  
b. weather stripping has been  
added on openable windows and  
doors and  
c. caulking or sealants are applied  
to areas such as joints around  
window and door frames, be-  
tween sole plates and floors, be-  
tween wall-ceiling joints, be-  
tween wall panels, at penetra-  
tions for plumbing, electrical, and  
gas lines, and at other openings.  
If your home meets all of the three  
criteria above, you must provide ad-  
ditional fresh air. See Ventilation Air  
From Outdoors, page 7.  
If your home does not meet all of the  
threecriteriaabove,proceedtoDeter-  
mining Fresh-Air Flow For Heater Lo-  
cation, page 6.  
Continued  
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NATURAL GAS RESIDENTIAL HEATERS  
AIR FOR  
COMBUSTION AND  
VENTILATION  
Continued  
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION  
Determining if You Have a Confined or Unconfined Space  
Use this worksheet to determine if you have a confined or unconfined space.  
Space:Includestheroominwhichyouwillinstallheaterplusanyadjoiningroomswithdoorlesspassagewaysorventilationgrillsbetween  
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 heater  
Gas water heater*  
Gas furnace  
___________________Btu/Hr  
___________________Btu/Hr  
___________________Btu/Hr  
___________________Btu/Hr  
___________________Btu/Hr  
Example:  
30,000  
30,000  
60,000  
Gas water heater  
Vent-free heater +  
Btu/Hr  
Btu/Hr  
Btu/Hr  
Vented gas heater  
Gas fireplace logs  
Total  
=
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)  
60,000 Btu/Hr (actual amount of Btu/Hr used)  
The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support.  
You must provide additional fresh air. Your options are as follows:  
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to 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 heater, if lower Btu/Hr size makes room unconfined.  
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no  
additional fresh air ventilation.  
WARNING: If the area in which the heater may be operated is smaller than that defined as an unconfined space  
or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of  
the methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3 or applicable local codes.  
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OWNER’S MANUAL  
AIR FOR  
COMBUSTION AND  
12"  
VENTILATION  
Continued  
VENTILATION AIR  
Ventilation Grills  
Into Adjoining Room,  
Option 2  
Ventilation  
Grills  
into Adjoining  
Room,  
Ventilation Air From Inside  
Building  
Or  
Remove  
Door into  
Adjoining  
Room,  
Thisfreshairwouldcomefromanadjoining  
unconfined space. When ventilating to an  
adjoining unconfined space, you must pro-  
vide two permanent openings: one within  
12" of the ceiling and one within 12" of the  
floor on the wall connecting the two spaces  
(see options 1 and 2, Figure 8). You can also  
remove door into adjoining room (see op-  
tion 3, Figure 8). Follow the National Fuel  
Gas Code, NFPA 54/ANS Z223.1, Section  
5.3, Air for Combustion and Ventilation for  
required size of ventilation grills or ducts.  
Option 1  
Option 3  
12"  
WARNING: Rework work-  
sheet, adding the space of the  
adjoining unconfined space. The  
combined spaces must have  
enough fresh air to supply all  
appliances in both spaces.  
Figure 8 - Ventilation Air from Inside Building  
Ventilated  
Attic  
Ventilation Air From Outdoors  
Outlet  
Air  
Provide extra fresh air by using ventilation  
grills or ducts. You must provide two per-  
manent openings: one within 12" of the  
ceiling and one within 12" of the floor.  
Connect these items directly to the outdoors  
orspacesopentotheoutdoors.Thesespaces  
include attics and crawl spaces. Follow the  
National Fuel Gas Code, NFPA 54/ANS  
Z223.1,Section5.3,AirforCombustionand  
Ventilation for required size of ventilation  
grills or ducts.  
Outlet  
Air  
To Attic  
To  
Crawl  
Space  
Inlet  
Air  
IMPORTANT: Do not provide openings for  
inlet or outlet air into attic if attic has a  
thermostat-controlledpowervent.Heatedair  
enteringtheatticwillactivatethepowervent.  
Ventilated  
Crawl Space  
Inlet Air  
Figure 9 - Ventilation Air from Outdoors  
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NATURAL GAS RESIDENTIAL HEATERS  
LOCATING HEATER  
INSTALLATION  
CAUTION: This heater cre-  
ates warm air currents. These  
currents move heat to wall sur-  
faces next to heater. Installing  
heater next to vinyl or cloth wall  
coverings or operating heater  
where impurities (such as to-  
bacco smoke, aromatic candles,  
cleaning fluids, oil or kerosene  
lamps, etc.) in the air exist, may  
discolor walls.  
WARNING:Maintainthemini-  
mumclearancesshowninFigure  
10. If you can, provide greater  
clearancesfromfloor,ceiling,and  
joining wall.  
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  
heat source. If you have a central  
heating system, you may run  
system’scirculatingblowerwhile  
using heater. This will help circu-  
late the heat throughout the  
house. In the event of a power  
outage, you can use this heater  
as your primary heat source.  
You can locate heater on floor. The op-  
tional hearth base is needed. You can also  
install optional decorative mantels on the  
heater (some mantels require the hearth  
base). IMPORTANT: Only use optional  
mantels and hearth base specified in this  
manual. Purchase the optional mantel and  
hearth base from your dealer. See Accesso-  
ries, page 23.  
IMPORTANT:Vent-freeheatersaddmois-  
ture to the air. Although this is beneficial,  
installing heater in rooms without enough  
ventilation air may cause mildew to form  
from too much moisture. See Air for Com-  
bustion and Ventilation, pages 5 through 7.  
WARNING: A qualified ser-  
vice person must install heater.  
Follow all local codes.  
The heater may also be mounted on a wall.  
Youcannotuseoptionalmantelifmounting  
heater on a wall.  
CAUTION: If you install the  
heater in a home garage  
• heaterpilotandburnermustbe  
at least 18 inches above floor.  
• locateheaterwheremovingve-  
hicle will not hit it.  
CHECK GAS TYPE  
WARNING: Never install the  
heater  
Use only natural gas. If your gas supply is  
not natural gas, do not install heater. Call  
dealer where you bought heater for proper  
type heater.  
• in a bedroom or bathroom  
• in a recreational vehicle  
• where curtains, furniture,  
clothing, or other flammable  
objectsarelessthan42inches  
from the front, top, or sides of  
the heater  
Forconvenienceandefficiency,installheater  
• where there is easy access for operation,  
inspection, and service.  
INSTALLATION ITEMS  
Beforeinstallingheater,makesureyouhave  
the items listed below.  
• in coldest part of room.  
• as a fireplace insert  
An optional fan kit is available from your  
dealer. See Accessories, page 23. If plan-  
ning to use fan, locate heater near an electri-  
cal outlet.  
• piping (check local codes)  
• sealant (resistant to propane/LP gas)  
• equipment shutoff valve *  
• ground joint union  
• test gauge connection *  
• sediment trap  
• in high traffic areas  
• in windy or drafty areas  
CEILING  
• tee joint  
36"  
Minimum  
• pipe wrench  
6"  
Minimum  
From  
Sides Of  
Heater  
* A CSA/AGA design-certified equipment  
shutoff valve with 1/8" NPT tap is an ac-  
ceptable alternative to test gauge connec-  
tion. Purchase the optional CSA/AGA de-  
sign-certifiedequipmentshutoffvalvefrom  
your dealer. See Accessories, page 23.  
Left  
Side  
Right  
Side  
5"  
Minimum To Top Surface  
Of Carpeting, Tile Or Other  
Combustible Material  
FLOOR  
Figure 10 - Mounting Clearances As Viewed From Front of Heater  
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OWNER’S MANUAL  
Marking Screw Locations  
INSTALLATION OPTIONS  
INSTALLATION  
1. Tape mounting bracket to wall where  
heater will be located. Make sure  
mounting bracket is level.  
Continued  
There are three options for mounting this  
heater.  
THERMOSTAT SENSING  
BULB  
A. Mounting heater to wall  
B. Mounting heater to optional hearth base  
WARNING:Maintainminimum  
clearances shown in Figure 13. If  
you can, provide greater clear-  
ancesfromfloorandjoiningwall.  
The thermostat sensing bulb has been placed  
insidetheheaterforprotectionduringshipping.  
C. Mounting heater to optional mantel  
(some mantels require the hearth base)  
Locating Thermostat Sensing  
Bulb  
1. Remove front panel of heater (see Fig-  
ure 2, page 3).  
A. MOUNTING HEATER TO  
WALL  
2. Mark screw locations on wall (see Fig-  
ure 13).  
Mounting Bracket  
Note: Only mark last hole on each end  
of mounting bracket. Insert mounting  
screws through these holes only.  
2. Locate thermostat sensing bulb just  
under burner assembly.  
The mounting bracket is located on back  
panel of heater. It has been taped there for  
shipping. Remove mounting bracket from  
back panel.  
IMPORTANT: Attach thermostat sensing  
bulb to back of heater for proper operation.  
3. Remove tape and mounting bracket  
from wall.  
11"  
Min.  
16"  
Attaching Thermostat Sensing  
Bulb  
1. Remove thermostat sensing bulb from  
holders inside heater. Route through  
slot opening in bottom of heater.  
Only Insert Mounting  
Screws Through Last  
Hole On Each End  
20 3/4"  
Min.  
AjdoingWal  
2. Place clamp on thermostat sensing bulb  
as shown in Figure 11. Clamp is pro-  
vided in hardware package.  
Mounting  
Bracket  
Floor  
3. Snap clamp into upper mounting hole  
as shown in Figure 11. Mounting hole  
is located on lower left edge on back  
of heater. Make sure the thermostat  
sensing bulb is pointing up.  
Figure 12 - Mounting Bracket Location  
Figure 13 - Mounting Bracket Clearances  
Methods For Attaching  
Mounting Bracket To Wall  
Attaching Mounting Bracket To  
Wall  
Only use last hole on each end of mounting  
bracket to attach bracket to wall. These two  
holes are 16 inches apart from their centers.  
Attach mounting bracket to wall in one of  
two ways.  
Note: Wall anchors, mounting screws, and  
spacers are in hardware package. The hard-  
ware package is provided with heater.  
Thermostat  
Sensing Bulb  
Attaching To Wall Stud Method  
Clamp  
1. Attaching to wall stud  
2. Attaching to wall anchor  
Forattachingmountingbrackettowallstuds.  
1. Drill holes at marked locations using  
9/64" drill bit.  
Attaching To Wall Stud: This method pro-  
vides the strongest hold. Insert mounting  
screws through mounting bracket and into  
wall studs.  
2. Place mounting bracket onto wall. Line  
up last hole on each end of bracket with  
holes drilled in wall.  
Figure 11 - Attaching Thermostat Sens-  
ing Bulb  
Attaching To Wall Anchor: This method  
allows you to attach mounting bracket to  
hollow walls (wall areas between studs) or  
to solid walls (concrete or masonry).  
3. Insert mounting screws through bracket  
and into wall studs.  
4. Tighten screws until mounting bracket  
is firmly fastened to wall studs.  
Decidewhichmethodbettersuitsyourneeds.  
Eithermethodwillprovideasecureholdfor  
the mounting bracket.  
Continued  
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NATURAL GAS RESIDENTIAL HEATERS  
Placing Heater On Mounting  
Bracket  
1. Locate two horizontal slots on back 1. Locate two bottom mounting holes.  
Installing Bottom Mounting  
Screws  
INSTALLATION  
Continued  
Attaching To Wall Anchor Method  
panel of heater.  
These holes are near bottom on back  
panel of heater (see Figure 17).  
For attaching mounting bracket to hollow  
walls (wall areas between studs) or solid  
walls (concrete or masonry).  
2. Place heater onto mounting bracket.  
Slide horizontal slots onto stand-out 2. Mark screw locations on wall.  
tabs on mounting bracket.  
3. Remove heater from mounting bracket.  
1. Drill holes at marked locations using  
5/16" drill bit. For solid walls (concrete  
or masonry), drill at least 1" deep.  
4. If installing bottom mounting screws  
Horizontal Slots  
into hollow or solid wall, install wall  
anchors. Follow steps 1 through 4 un-  
der Attaching To Wall Anchor Method.  
If installing bottom mounting screw  
into wall stud, drill holes at marked lo-  
cations using 9/64" drill bit.  
2. Fold wall anchor as shown in Figure 14.  
Stand-Out  
Tab  
3. Insert wall anchor (wings first) into  
hole. Tap anchor flush to wall.  
4. For thin walls (1/2" or less), insert red  
key into wall anchor. Push red key to  
“pop” open anchor wings.  
5. Replace heater onto mounting bracket.  
6. Place spacers between bottom mount-  
ing holes and wall anchor or drilled hole.  
IMPORTANT: Do not hammer key!  
For thick walls (over 1/2" thick) or solid  
walls, do not pop open wings.  
Mounting Bracket  
(attached to wall)  
7. Hold spacer in place with one hand.  
With other hand, insert mounting screw  
through bottom mounting hole and  
spacer. Place tip of screw in opening  
of wall anchor or drilled hole.  
Figure 16 - Mounting Heater Onto Mount-  
ing Bracket  
5. Place mounting bracket onto wall. Line  
up last hole on each end of bracket with  
wall anchors.  
6. Insert mounting screws through bracket  
and into wall anchors.  
8. Tighten both screws until heater is  
firmly secured to wall. Do not over  
tighten.  
7. Tighten screws until mounting bracket  
is firmly fastened to wall.  
Note: Do not replace front panel at this  
time. Replace front panel after making  
gas connections and checking for leaks  
(see pages 12 and 13).  
Figure 14 - Folding Anchor  
Figure 17 - Installing Bottom Mounting  
Screws  
Figure 15 - Popping Open Anchor Wings  
For Thin Walls  
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OWNER’S MANUAL  
Mounting Heater to Optional  
Hearth Base  
1. Lay heater on its back on a table with  
the bottom of heater overhanging the  
edge of the table.  
Securing Hearth Base to Floor  
INSTALLATION  
1. Position hearth base in desired location.  
Mark holes for drilling (See Figure 18).  
Remove hearth base.  
Continued  
B. MOUNTING HEATER ON  
OPTIONAL HEARTH BASE  
2. For carpeted floor, make a small cut  
with a sharp knife at marked locations  
before drilling.  
2. Remove 2 shipping screws in bottom  
of heater. Discard shipping screws.  
Tools needed:  
• #2 Phillips screwdriver  
• slotted screwdriver  
If securing to a wood floor, drill a 3/4"  
deep hole using a 1/8" diameter drill  
bit. Do not use anchors in wood floors.  
3. Line up mounting holes on top of hearth  
base with holes in bottom of heater (see  
Figure 18).  
• electric drill (if securing base to floor)  
If securing to a concrete floor, drill a 1  
3/8" deep hole using a 1/4" diameter  
concrete drill bit. Completely insert an-  
chors into each hole.  
The optional hearth base kit includes the  
following:  
4. Using a Phillips screwdriver, secure  
hearth base to heater with four sheet  
metal screws (see Figure 18).  
• Hearth Base  
5. Stand heater up on base.  
• 4 Wood Screws  
• 4 Sheet Metal Screws  
• Brass Base Trim  
• Hearth Insert  
3. Mount heater to hearth base following  
steps under Mounting Heater to Op-  
tional Hearth Base. After mounting  
heater, position heater and hearth base  
over drilled holes. With slotted screw-  
driver, secure hearth base to floor with  
four wood screws.  
6. Place hearth insert in hearth base as  
shown in Figure 19.  
7. Assemble brass trim (see steps 1  
through 7 under Assembling and At-  
taching Brass Trim, page 4).  
• 4 Anchors  
• 2 Brass Screws  
8. Slide base trim on heater base. Attach  
brass trim to base with two brass screws  
included as shown in Figure 19.  
Note: It is an option to secure “A” model  
hearthbasetofloor. YoumustsecuretheB”  
and “C” model hearth bases to floor. To  
secure hearth base to floor, follow instruc-  
tionsunderSecuringHearthBasetoFloor.If  
not securing hearth base to floor, proceed to  
Mounting Heater to Optional Hearth Base.  
Bottom of Heater  
Shipping Screw  
Hearth  
Insert  
Base  
Screw  
Mounting  
Holes  
Brass Base  
Trim  
Sheet Metal  
Screw  
Figure19-PlacingHearthInsertonHeater  
Base and Attaching Brass Base Trim  
Holes for Securing  
Heater to Floor  
Figure 18 - Attaching Heater to Hearth  
Base  
Continued  
104431  
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NATURAL GAS RESIDENTIAL HEATERS  
INSTALLATION  
CAUTION:Usepipejointseal-  
ant that is resistant to liquid pe-  
troleum (LP) gas.  
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  
proper gas volume to heater. If  
pipe is too small, undue loss of  
pressure will occur.  
Continued  
C. MOUNTING HEATER TO  
OPTIONAL MANTEL  
We recommend that you install a sediment  
trap in supply line as shown in Figure 20.  
Locate sediment trap where it is within  
reach for cleaning. Install in piping system  
betweenfuelsupplyandheater.Locatesedi-  
ment trap where trapped matter is not likely  
to freeze. A sediment trap traps moisture  
and contaminants. This keeps them from  
going into heater controls. If sediment trap  
is not installed or is installed wrong, heater  
may not run properly.  
See Instructions Included  
With Mantel Kit.  
Assembling Mantel  
IMPORTANT: Only use the optional man-  
tels specified in this manual. See Accesso-  
ries, page 23 for proper mantel kits. This  
heater is only approved for use with models  
GMF800/GMU801 series, GM900F/  
GM901Useries,GM902F/GM903Useries,  
GM700F/GM701U series, and GM702F/  
GM703Useriesmantelkits.Usinganyother  
mantel will void the CSA/AGA approval  
for this heater. Only use models GMF800/  
GMU801series,GM900F/GM901Useries,  
GM902F/GM903U series, GM700F/  
GM701U series, and GM702F/GM703U  
series mantels with this heater. Do not use  
these mantels with any other product.  
Installation must include an equipment  
shutoff valve, union, and plugged 1/8" NPT  
tap. Locate NPT tap within reach for test  
gauge hook up. NPT tap must be upstream  
from heater (see Figure 20).  
IMPORTANT:Installanequipmentshutoff  
valve in an accessible location. The equip-  
ment shutoff valve is for turning on or  
shutting off the gas to the appliance.  
IMPORTANT:Holdpressureregulatorwith  
wrench when connecting it to gas piping  
and/or fittings.  
Apply pipe joint sealant lightly to male  
threads. This will prevent excess sealant  
from going into pipe. Excess sealant in pipe  
could result in clogged heater valves.  
Note: Burner bracket not  
shown for clarity  
Pressure  
Regulator  
CONNECTING TO GAS  
SUPPLY  
3/8" NPT  
Pipe Nipple  
WARNING:Thisappliancere-  
quires a 3/8" NPT (National Pipe  
Thread) inlet connection to the  
pressure regulator.  
Ground  
Heater Cabinet  
Union  
Joint  
Tee Joint  
Reducer  
Bushing to  
1/8" NPT  
WARNING: A qualified service  
personmustconnectheatertogas  
supply. Follow all local codes.  
Equipment Shutoff  
Valve *  
Test Gauge  
Connection *  
From Gas Meter  
(5" W.C. to 10.5"  
W.C. Pressure)  
WARNING: Never connect  
heater to private (non-utility) gas  
wells. This gas is commonly  
known as wellhead gas.  
1/8" NPT  
Plug Tap  
Tee Joint  
Pipe  
IMPORTANT: Check gas line pressure be-  
fore connecting heater to gas line. Gas line  
pressure must be no greater than 14 inches  
of water. If gas line pressure is higher,  
heater regulator damage could occur.  
Sediment  
3" Minimum  
Nipple  
Trap  
Cap  
Figure 20 - Gas Connection  
* ACSA/AGAdesign-certifiedequipmentshutoffvalvewith1/8"NPTtapisanacceptable  
alternative to test gauge connection. Purchase the optional CSA/AGA design-certified  
equipment shutoff valve from your dealer. See Accessories, page 23.  
104431  
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OWNER’S MANUAL  
Test Pressures Equal To or Less Than  
1/2 PSIG (3.5 kPa)  
Pressure Testing Heater Gas  
Connections  
1. Open equipment shutoff valve (see Fig-  
ure 21).  
INSTALLATION  
Continued  
1. Close equipment shutoff valve (see Fig-  
ure 21).  
CHECKING GAS  
CONNECTIONS  
2. Pressurize supply piping system by  
either using compressed air or open-  
ing main gas valve located on or near  
gas meter.  
2. Open main gas valve located on or near  
gas meter.  
WARNING: Test all gas pip-  
ing and connections for leaks  
after installing or servicing. Cor-  
rect all leaks at once.  
3. Make sure control knob of heater is in  
the OFF position.  
3. Check all joints from gas meter to  
equipment shutoff valve (see Figure  
22). Apply mixture of liquid soap and  
water to gas joints. Bubbles forming  
show a leak.  
4. Check all joints from equipment shutoff  
valve to thermostat gas valve (see Fig-  
ure 22). Apply mixture of liquid soap  
and water to gas joints. Bubbles form-  
ing show a leak.  
WARNING:Neveruseanopen  
flame to check for a leak. Apply a  
mixture of liquid soap and water  
toalljoints.Bubblesformingshow  
a leak. Correct all leaks at once.  
4. Correct all leaks at once.  
5. Correct all leaks at once.  
6. Light heater (see Operating Heater,  
pages 14 and 15). Check all other in-  
ternal joints for leaks.  
Equipment  
Shutoff  
Open  
Pressure Testing Gas Supply  
Piping System  
Valve  
7. Turn off heater (see To Turn Off Gas to  
Appliance, page 14).  
Test Pressures In Excess Of 1/2 PSIG  
(3.5 kPa)  
8. Replace front panel.  
1. Disconnect appliance with its appliance  
main gas valve (control valve) and equip-  
ment shutoff valve from gas supply pip-  
ing system. Pressures in excess of 1/2 psig  
will damage heater regulator.  
Closed  
Figure 21 - Equipment Shutoff Valve  
Thermostat Gas  
Valve Location  
2. Cap off open end of gas pipe where  
equipment shutoff valve was connected.  
3. Pressurize supply piping system by  
either using compressed air or open-  
ing main gas valve located on or near  
gas meter.  
4. Check all joints of gas supply piping  
system. Apply mixture of liquid soap  
and water to gas joints. Bubbles form-  
ing show a leak.  
Gas Meter  
5. Correct all leaks at once.  
Equipment  
Shutoff  
Valve  
6. Reconnect heater and equipment  
shutoff valve to gas supply. Check re-  
connected fittings for leaks.  
Figure 22 - Checking Gas Joints  
104431  
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NATURAL GAS RESIDENTIAL HEATERS  
7. Keep control knob pressed in for 30  
LIGHTING  
INSTRUCTIONS  
OPERATING  
HEATER  
seconds after lighting pilot. After 30  
seconds, release control knob.  
• If control knob does not pop up  
when released, contact a qualified  
service person or gas supplier for  
repairs.  
1. STOP! Read the safety information  
in column 1.  
FOR YOUR SAFETY  
2. Make sure equipment shutoff valve  
is fully open.  
READ BEFORE  
LIGHTING  
Note: If pilot goes out, repeat steps  
3 through 7. This heater has a safety  
interlock system. Wait one (1) minute  
before lighting pilot again.  
3. Turn control knob clockwise  
to the OFF position.  
WARNING: If you do not fol-  
low these instructions exactly, a  
fireorexplosionmayresultcaus-  
ing property damage, personal  
injury or loss of life.  
4. Wait five (5) minutes to clear out any  
gas. Then smell for gas, including  
near the floor. If you smell gas,  
STOP! Follow “B” in the safety in-  
formation, column 1. If you don’t  
smell gas, go to the next step.  
8. Turn control knob counterclockwise  
to desired heating level. The  
main burner should light. Set control  
knob to any heat level between HI  
and LO.  
A. This appliance has a pilot which must  
be lighted by hand. When lighting the  
pilot, follow these instructions exactly.  
5. Turn control knob counterclockwise  
to PILOT position. Press in  
control knob for five (5) seconds (see  
Figure 23).  
CAUTION:Donottrytoadjust  
heatinglevelsbyusingtheequip-  
ment shutoff valve.  
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.  
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. This will allow air to  
bleed from the gas system.  
Ignitor Electrode  
Thermocouple  
WHAT TO DO IF YOU SMELL  
GAS  
Pilot Burner  
• Do not try to light any appliance.  
• Do not touch any electric switch; do  
not use any phone in your building.  
• Immediately call your gas supplier  
from a neighbor’s phone. Follow  
the gas supplier’s instructions.  
• If you cannot reach your gas sup-  
plier, call the fire department.  
6. With control knob pressed in, push  
down and release ignitor button.  
This will light pilot. The pilot is at-  
tached to the front of burner. If  
needed, keep pressing ignitor but-  
ton until pilot lights.  
Note: If pilot does not stay lit, refer  
to Troubleshooting, pages 16 through  
18. Also contact a qualified service  
person or gas supplier for repairs.  
Until repairs are made, light pilot with  
match. To light pilot with match, see  
Manual Lighting Procedure, page 15.  
C. Use only your hand to push in or turn  
the gas control knob. Never use tools.  
If the knob will not push in or turn  
by hand, don’t try to repair it, call a  
qualified service technician or gas  
supplier. Force or attempted repair  
may result in a fire or explosion.  
Figure 24 - Pilot  
TO TURN OFF GAS  
TO APPLIANCE  
Shutting Off Heater  
1. Turn control knob clockwise  
to the OFF position.  
D. Do not use this appliance if any part  
has been under water. Immediately  
call a qualified service technician to  
inspect the appliance and to replace  
any part of the control system and  
any gas control which has been un-  
der water.  
Ignitor Button  
Control Knob  
2. Turn off all electric power to the ap-  
pliance if service is to be performed.  
LO  
P I L O T  
O F F  
H I  
Shutting Off Burner Only (pilot  
stays lit)  
IGNITOR  
Figure 23 - Control Knob In The OFF  
Position  
Turn control knob clockwise  
the PILOT position.  
to  
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OWNER’S MANUAL  
BURNER FLAME PATTERN  
OPERATING  
INSPECTING  
BURNER  
Figure 27 shows a correct burner flame  
pattern.Figure28showsanincorrectburner  
flame pattern. The incorrect burner flame  
pattern shows yellow tipping of the flame.  
It also shows the flame higher than one  
inch above the log.  
HEATER  
Continued  
Check pilot flame pattern and burner flame  
pattern often.  
THERMOSTAT  
CONTROL OPERATION  
PILOT FLAME PATTERN  
The thermostatic control used on this  
heater differs from standard thermostats.  
Standard thermostats simply turn on and  
off the burner. The thermostat used on  
this heater senses the room temperature.  
The thermostat adjusts the amount of gas  
flow to the burner. This increases or de-  
creases the burner flame height. At times  
the room may exceed the set temperature.  
Figure25showsacorrectpilotflamepattern.  
Figure 26 shows an incorrect pilot flame  
pattern.Theincorrectpilotflameisnottouch-  
ing the thermocouple. This will cause the  
thermocouple to cool. When the thermo-  
couple cools, the heater will shut down.  
Note: When using the heater the first time,  
the flame will be yellow for approximately  
one hour until the log cures.  
WARNING: If yellow tipping  
occurs, your heater could pro-  
duce increased levels of carbon  
monoxide. If burner flame pat-  
tern shows yellow tipping, follow  
instructions,bottomofthispage.  
If pilot flame pattern is incorrect, as shown  
in Figure 26  
If so, the burner will shut off. The burner • turn heater off (see To Turn Off Gas to  
willcyclebackonwhenroomtemperature  
drops below the set temperature.  
Appliance, page 14)  
• see Troubleshooting, pages 16 through 18  
NOTICE: Do not mistake orange  
flames with yellow tipping. Dirt  
or other fine particles enter the  
heater and burn causing brief  
patches of orange flame.  
The control knob can be set to any heat  
level between HI and LO.  
Pilot Burner  
Note: The thermostat sensing bulb mea-  
sures the temperature of air near the  
heatercabinet.Thismaynotalwaysagree  
with room temperature (depending on  
housing construction, installation loca-  
tion, room size, open air temperatures,  
etc.). Frequent use of your heater will let  
you determine your own comfort levels.  
Thermocouple  
Ifburnerflamepatternisincorrect,asshown  
in Figure 28  
GOOD PILOT  
GRH/OV 0  
• turn heater off (see To Turn Off Gas to  
Figure 25 - Correct Pilot Flame Pattern  
Appliance, page 14)  
• see Troubleshooting, pages 16 through 18  
MANUAL LIGHTING  
PROCEDURE  
Top of Flame About  
One Inch Above Logs  
Pilot Burner  
1. Remove front panel (see Figure 2,  
page 3).  
Thermocouple  
2. Follow steps 1 through 5 under Light-  
ing Instructions, page 14.  
BAD PILOT/LP  
GRH/OV 008  
3. With control knob pressed in, strike  
match. Hold match to pilot until pi-  
lot lights.  
Figure 26 - Incorrect Pilot Flame Pattern  
Figure 27 - Correct Burner Flame Pattern  
4. Keep control knob pressed in for 30  
seconds after lighting pilot. After 30  
seconds, release control knob. Now  
follow step 8 under Lighting Instruc-  
tions, page 14.  
Yellow Tipping  
5. Replace front panel.  
Figure28-IncorrectBurnerFlamePattern  
104431  
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NATURAL GAS RESIDENTIAL HEATERS  
TROUBLESHOOTING  
Note: For additional help, visit DESA  
International’stechnicalservicewebsite  
CAUTION: Never use a wire,  
WARNING: Turn off and un-  
plug heater and let cool before  
servicing. Only a qualified ser-  
vice person should service and  
repair heater.  
needle, or similar object to clean  
ODS/pilot.ThiscandamageODS/  
pilot unit.  
Note:Alltroubleshootingitemsarelistedin  
order of operation.  
OBSERVED PROBLEM  
POSSIBLE CAUSE  
REMEDY  
When ignitor button is pressed, there is no 1. Ignitor electrode positioned wrong  
spark at ODS/pilot 2. Ignitor electrode broken  
1. Replace ignitor  
2. Replace ignitor  
3. Ignitor electrode not connected to igni- 3. Reconnect ignitor cable  
tor cable  
4. Ignitor cable pinched or wet  
4. Free ignitor cable if pinched by any  
metal or tubing. Keep ignitor cable dry  
5. Tighten nut holding piezo ignitor to  
heater cabinet. Nut is located inside  
heater cabinet at top  
5. Piezo ignitor nut is loose  
6. Broken ignitor cable  
7. Bad piezo ignitor  
6. Replace ignitor cable  
7. Replace piezo ignitor  
When ignitor button is pressed, there is 1. Gas supply turned off or equipment 1. Turn on gas supply or open equipment  
spark at ODS/pilot but no ignition  
shutoff valve closed  
shutoff valve  
2. Control knob not in PILOT position  
2. Turn control knob to PILOT position  
3. Control knob not pressed in while in 3. Press in control knob while in PILOT  
PILOT position  
position  
4. Air in gas lines when installed  
4. Continue holding down control knob.  
Repeat igniting operation until air is re-  
moved  
5. ODS/pilot is clogged  
5. Clean ODS/pilot (see Cleaning and  
Maintenance, page 19) or replace ODS/  
pilot assembly  
6. Gas regulator setting is not correct  
6. Replace gas regulator  
ODS/pilot lights but flame goes out when 1. Control knob not fully pressed in  
1. Press in control knob fully  
control knob is released  
2. Control knob not pressed in long enough 2. After ODS/pilot lights, keep control  
knob pressed in 30 seconds  
3. Safety interlock system has been triggered 3. Wait one minute for safety interlock sys-  
tem to reset. Repeat ignition operation  
4. Equipment shutoff valve not fully open 4. Fully open equipment shutoff valve  
5. Thermocouple connection loose at con- 5. Hand tighten until snug, then tighten 1/4  
trol valve  
turn more  
6. Pilot flame not touching thermocouple, 6. A) Contact local natural gas company  
which allows thermocouple to cool,  
causing pilot flame to go out. This prob-  
lem could be caused by one or both of  
the following:  
B) Clean ODS/pilot (see Cleaning and  
Maintenance, page 19) or replace ODS/  
pilot assembly  
A) Low gas pressure  
B) Dirty or partially clogged ODS/pilot  
7. Thermocouple damaged  
8. Control valve damaged  
7. Replace thermocouple  
8. Replace control valve  
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OWNER’S MANUAL  
TROUBLESHOOTING  
Continued  
OBSERVED PROBLEM  
POSSIBLE CAUSE  
REMEDY  
Burner does not light after ODS/pilot is lit  
1. Burner orifice is clogged  
1. Clean burner (see Cleaning and Mainte-  
nance, page 19) or replace burner orifice  
2. Burner orifice diameter is too small  
3. Inlet gas pressure is too low  
2. Replace burner orifice  
3. Contact local natural gas company  
Delayed ignition of burner  
1. Manifold pressure is too low  
2. Burner orifice is clogged  
1. Contact local natural gas company  
2. Clean burner (see Cleaning and Mainte-  
nance, page 19) or replace burner orifice  
Burner backfiring during combustion  
1. Burner orifice is clogged or damaged  
1. Clean burner (see Cleaning and Mainte-  
nance, page 19) or replace burner orifice  
2. Replace burner  
2. Burner damaged  
3. Gas regulator defective  
3. Replace gas regulator  
Yellow flame during burner combustion  
1. Not enough air  
1. Check burner for dirt and debris. If  
found, clean burner (see Cleaning and  
Maintenance, page 19)  
2. Gas regulator defective  
2. Replace gas regulator  
Slight smoke or odor during initial operation 1. Residues from manufacturing processes 1. Problem will stop after a few hours of  
operation  
Heater produces a whistling noise when 1. Turning control knob to HI position 1. Turn control knob to LO position and  
burner is lit  
when burner is cold  
2. Air in gas line  
let warm up for a minute  
2. Operate burner until air is removed from  
line. Have gas line checked by local  
natural gas company  
3. Air passageways on heater blocked  
3. Observe minimum installation clear-  
ances (see Figure 10, page 8)  
4. Dirty or partially clogged burner orifice 4. Clean burner (see Cleaning and Mainte-  
nance, page 19) or replace burner orifice  
Whitepowderresidueformingwithinburner 1. When heated, vapors from furniture pol- 1. Turn heater off when using furniture  
box or on adjacent walls or furniture  
ish, wax, carpet cleaners, etc. turn into  
white powder residue  
polish, wax, carpet cleaners, or similar  
products  
Continued  
104431  
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NATURAL GAS RESIDENTIAL HEATERS  
TROUBLESHOOTING  
Continued  
WARNING: If you smell gas  
• Shut off gas supply.  
• Do not try to light any appliance.  
• Do not touch any electrical switch; do not use any phone in your  
building.  
• Immediatelycallyourgassupplierfromaneighbor’sphone.Followthe  
gas supplier’s instructions.  
• If you cannot reach your gas supplier, call the fire department.  
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning  
supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles,  
etc., create fumes. These fumes may mix with combustion air and create odors.  
OBSERVED PROBLEM  
POSSIBLE CAUSE  
REMEDY  
Heater produces a clicking/ticking noise 1. Metal expanding while heating or con-  
1. This is common with most heaters. If  
noise is excessive, contact qualified ser-  
vice person  
just after burner is lit or shut off  
tracting while cooling  
Heater produces unwanted odors  
1. Heater burning vapors from paint, hair  
spray, glues, etc. (see IMPORTANT  
statement above)  
1. Ventilate room. Stop using odor caus-  
ing products while heater is running  
2. Gas leak. SeeWarning statement at  
top of page  
2. Locate and correct all leaks (see Check-  
ing Gas Connections, page 13)  
Heater shuts off in use (ODS operates)  
1. Not enough fresh air is available  
2. Low line pressure  
3. ODS/pilot is partially clogged  
1. Open window and/or door for ventilation  
2. Contact local natural gas company  
3. Clean ODS/pilot (see Cleaning and  
Maintenance, page 19)  
Gas odor even when control knob is in OFF 1. Gas leak. SeeWarning statement at  
1. Locate and correct all leaks (see Check-  
ing Gas Connections, page 13)  
2. Replace control valve  
position  
top of page  
2. Control valve defective  
Gas odor during combustion  
1. Foreign matter between control valve  
and burner  
1. Take apart gas tubing and remove for-  
eign matter  
2. Gas leak. SeeWarning statement at  
top of page  
2. Locate and correct all leaks (see Check-  
ing Gas Connections, page 13)  
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OWNER’S MANUAL  
4. Check the injector holder located at the  
end of the burner tube again. Remove  
CLEANING AND  
MAINTENANCE  
REPLACEMENT  
any large particles of dust, dirt, lint, or PARTS  
pet hairs with a soft cloth or vacuum  
Note: Use only original replacement parts.  
Thiswillprotectyourwarrantycoveragefor  
parts replaced under warranty.  
cleaner nozzle.  
WARNING: Turn off heater  
and let cool before cleaning.  
5. Blow air into the primary air holes on  
the injector holder.  
PARTS UNDER WARRANTY  
6. In case any large clumps of dust have  
now been pushed into the burner repeat  
steps 3 and 4.  
CAUTION: You must keep  
control areas, burner, and circu-  
lating air passageways of heater  
clean. Inspect these areas of  
heater before each use. Have  
heaterinspectedyearlybyaquali-  
fied service person. Heater may  
needmorefrequentcleaningdue  
to excessive lint from carpeting,  
pet hair, bedding material, etc.  
Contact authorized dealers of this product.  
If they can’t supply original replacement  
Clean the pilot assembly also. A yellow tip part(s), call DESA International’s Techni-  
on the pilot flame indicates dust and dirt in cal Service Department at 1-800-323-5190  
the pilot assembly. There is a small pilot air for referral information.  
inlet hole about two inches from where the  
WhencallingDESAInternational,haveready  
pilot flame comes out of the pilot assembly  
• your name  
(see Figure 30). With the unit off, lightly  
• your address  
blow air through the air inlet hole. You may  
blowthroughadrinkingstrawifcompressed  
air is not available.  
• model and serial numbers of your heater  
• how heater was malfunctioning  
• type of gas used (propane/LP or natural gas)  
• purchase date  
CLEANING BURNER  
INJECTOR HOLDER AND  
PILOT AIR INLET HOLE  
Injector Holder  
The primary air inlet holes allow the proper  
amount of air to mix with the gas. This  
provides a clean burning flame. Keep these  
holesclearofdust, dirt, andlint. Cleanthese  
air inlet holes prior to each heating season.  
Blocked air holes will create soot. We rec-  
ommend that you clean the unit every 2,500  
hours of operation or every three months.  
Usually, we will ask you to return the defec-  
tive part to the factory.  
Ports/Slots  
PARTS NOT UNDER  
WARRANTY  
Burner  
Tube  
Contact authorized dealers of this product.  
If they can’t supply original replacement  
part(s), call DESA International’s Parts  
Department at 1-800-972-7879 for referral  
information.  
Primary Air Inlet  
Holes  
Wealsorecommendthatyoukeeptheburner  
tube and pilot assembly clean and free of  
dustanddirt.Tocleanthesepartswerecom-  
mend using compressed air no greater than  
30 PSI. Your local computer store, hard-  
ware store, or home center may carry com-  
pressed air in a can. You can use a vacuum  
cleaner in the blow position. If using com-  
pressed air in a can, please follow the direc-  
tions on the can. If you don't follow direc-  
tions on the can, you coulddamage the pilot  
assembly.  
Figure 29 - Injector Holder On Outlet  
Burner Tube  
WhencallingDESAInternational,haveready  
• model number of your heater  
Pilot Air Inlet  
Hole  
• the replacement part number  
SERVICE HINTS  
When Gas Pressure Is Too Low  
• pilot will not stay lit  
Pilot Assembly  
1. Shut off the unit, including the pilot.  
Allow the unit to cool for at least thirty  
minutes.  
• burner(s) will have delayed ignition  
• heater will not produce specified heat  
Figure 30 - Pilot Inlet Air Hole  
CABINET  
2. Inspect burner, pilot, and primary air  
inlet holes on injector holder for dust  
and dirt (see Figure 29).  
When Gas Quality Is Bad  
• pilot will not stay lit  
Air Passageways  
• Use a vacuum cleaner or pressurized air  
to clean.  
• burner(s) will produce flames and soot  
• heater will backfire when lit  
3. Blow air through the ports/slots and  
holes in the burner.  
Youmayfeelyourgaspressureistoolowor  
gas quality is bad. If so, contact your local  
natural gas supplier.  
Exterior  
• Use a soft cloth dampened with a mild  
soap and water mixture. Wipe the cabi-  
net to remove dust.  
104431  
19  
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®
NATURAL GAS RESIDENTIAL HEATERS  
ILLUSTRATED  
PARTS  
24  
21  
BREAKDOWN  
VMH3000TN  
25  
23  
7
8
10  
20  
6
16  
13  
18  
17  
12  
5
14  
9
6
10  
11  
22  
26  
1
15  
19  
3
4
2
1
12-1  
12-2  
1
104431  
20  
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OWNER’S MANUAL  
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed  
under Replacement Parts on page 19 of this manual.  
PARTS LIST  
VMH3000TN  
KEY  
NO.  
VMH3000TN  
PART NO.  
DESCRIPTION  
QTY.  
1
2
3
4
5
6
7
8
098304-01  
Screw, #10 x 3/8"  
Front Panel  
6
1
1
1
1
6
1
8
1
1
2
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
1
5
100566-01CK  
100573-01BR  
100568-02BR  
100903-04  
098303-02  
099066-01  
M11084-26  
100571-03BR  
098271-03  
098249-01  
099440-05  
Screen Assembly  
Burner Shield  
Log, Service Kit  
Screw, #8 x 3/8"  
Mounting Bracket  
Screw, #10 x 3/8"  
Deflector Unit  
Ignitor Cable  
9
10  
11  
12  
Nut, M5  
ODS/Pilot Assembly  
Thermocouple  
Ignitor Electrode  
Burner  
3/16" Pilot Tubing  
Injector  
12-1 098514-01  
12-2 098594-01  
13  
103447-01  
099387-03  
103845-09  
NJF-8C  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
Nut, Hex  
099415-11  
103408-01  
103255-01  
103256-01  
103837-03  
101046-01  
098522-12  
098529-07  
097159-04  
098304-03  
Pressure Regulator  
Burner Bracket  
3/8" Outlet (Burner) Tubing  
3/8" Inlet Tubing  
Bracket Support  
Log Strap  
Thermostat Gas Valve  
Cabinet  
Piezo Ignitor  
Screw, #8 x 3/8"  
PARTS AVAILABLE — NOT SHOWN  
100562-01  
100563-01  
101899-01  
100769-02  
100642-01  
100565-01  
101416-30  
Lighting Instructions Plate  
Warning Plate  
1
1
1
1
1
1
1
Brass Trim Assembly  
Brass Trim Hardware  
Hardware Package  
Warning Plate Fastener Kit  
Instructional Video  
104431  
21  
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®
NATURAL GAS RESIDENTIAL HEATERS  
SPECIFICATIONS  
TECHNICAL  
SERVICE  
You may have further questions about in-  
stallation, operation, or Trouble Shooting.  
If so, contact DESA International’s Techni-  
cal Service Department at 1-800-323-5190.  
Btu (Variable)  
Type Gas  
15,000/30,000  
Natural Only  
Piezo  
Ignition  
Pressure Regulator Setting  
Inlet Gas Pressure (in. of water) *  
Maximum  
Minimum  
Dimensions, Inches (H x W x D)  
3" W.C.  
10.5"  
5"  
You can also visit DESA International’s  
technical service web site at  
Heater  
Carton  
23.75 x 25.9 x 8.5  
25.8 x 28.7 x 10.1  
Weight (pounds)  
Heater  
29  
35  
Shipping  
* For purposes of input adjustment  
104431  
22  
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OWNER’S MANUAL  
ACCESSORIES  
Purchasetheseheateraccessoriesfromyour  
local dealer. If they can not supply these  
accessoriescallDESAInternational’sSales  
Department at 1-800-458-2472 for infor-  
mation. You can also write to the address  
listed on the back page of this manual.  
HEARTH BASE - GHB802  
Series  
For locating heater on the floor. Includes  
brass trim. Complete installation instruc-  
tions included.  
CORNER MANTEL  
Unfinished - GM703U Series  
Finished - GM702F Series  
EQUIPMENT SHUTOFF  
VALVE - GA5010  
Forusewithheater. Featuresabuilt-inbase.  
Space-savingcornerdesignfeaturingclean,  
classic lines. Available in a walnut finish or  
an unfinished hardwood, ready to stain or  
paint. Complete assembly and installation  
instructions included.  
Equipmentshutoffvalvewith1/8"NPTtap.  
FAN KITS  
GA3100A - Manually-  
Controlled  
GA3200TA - Thermostatically-  
Controlled  
PREMIER MANTEL  
Unfinished - GM903U Series  
Finished - GM902F Series  
White Lacquer Finish - GM904W  
(differs slightly from illustration)  
Provides better heat distribution. Makes  
heater more efficient. Complete installation  
and operating instructions included.  
Forusewithheater. Featuresabuilt-inbase.  
Sturdy hardwood construction with classic  
styling and attractive molding. Available in  
a walnut finish or an unfinished hardwood,  
ready to stain or paint. Complete assembly  
and installation instructions included.  
104431  
23  
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WARRANTY INFORMATION  
KEEP THIS WARRANTY  
Model ________________________________  
Serial No. _____________________________  
Date Purchased ________________________  
Always specify model and serial numbers when communicating with the factory.  
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard written  
warranty. We make no other warranty, expressed or implied.  
LIMITED WARRANTY  
VENT-FREE NATURAL GAS LOG HEATERS  
DESA International warrants this product to be free from defects in materials and components for four (4) years from the date of  
first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable  
instructions. To make a claim under this warranty the Bill of Sale or cancelled check must be presented.  
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to restore this heater  
to proper operating condition and an allowance for labor when provided by a DESA Authorized Service Center. Warranty part(s)  
MUST be obtained through authorized dealers of this product and/or DESA International who will provide original factory  
replacementparts.Failuretouseoriginalfactoryreplacementpartsvoidsthiswarranty.TheheaterMUSTbeinstalledbyaqualified  
installer in accordance with all local codes and instructions furnished with the unit.  
This warranty does not apply to parts that are not in original condition because of normal wear and tear, or parts that fail or become  
damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by improper installation. Travel, diagnostic  
cost, labor, transportation and any and all such other costs related to repairing a defective heater will be the responsibility of the owner.  
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE  
PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND  
LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTA-  
BILITYANDFITNESSFORAPARTICULARPURPOSETOFOUR(4)YEARSONALLCOMPONENTSFROMTHEDATE  
OF FIRST PURCHASE; AND DESA INTERNATIONAL’S LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE  
OF THE PRODUCT AND DESA INTERNATIONAL SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSO-  
EVER INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.  
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or  
consequential damages, so the above limitation on implied warranties, or exclusion or limitation on damages may not apply to you.  
This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.  
For information about this warranty write:  
INTERNATIONAL  
2701 Industrial Drive  
P.O. Box 90004  
Bowling Green, KY 42102-9004  
104431-01  
Rev. D  
104431 01  
03/00  
NOT A UPC  
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