Desa Water Heater GWP10 GWN10T User Manual

UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER  
SAFETY INFORMATION AND INSTALLATION MANUAL  
MODELS GWN6, GWP6, GWN10, GWP10  
GWN10T AND GWP10T  
WARNING: If the information in this manual is not fol-  
lowed 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.  
• Immediatelycallyourgassupplierfromaneighbor’s  
phone. Follow the gas supplier’s instructions.  
• If you cannot reach your gas supplier, call the fire  
department.  
Installation and service must be performed by a quali-  
fied installer, service agency or the gas supplier.  
Save this manual for future reference.  
 
SAFETY INFORMATION  
Due to high temperatures, the  
applianceshouldbelocatedout  
oftrafficandawayfromfurniture  
and draperies.  
WARNING: This product  
contains and/or generates  
chemicals known to the State  
of California to cause cancer or  
birth defects or other reproduc-  
tive harm.  
Do not place clothing or other  
flammable material on or near  
the appliance. Never place any  
objects on the heater.  
IMPORTANT: Read this owner’s  
manualcarefullyandcompletely  
before trying to assemble,  
operate or service this heater.  
Improper use of this heater can  
cause serious injury or death  
from burns, fire, explosion,  
electrical shock and carbon  
monoxide poisoning.  
Surface of heater becomes very  
hot when running heater. Keep  
children and adults away from  
hot surface to avoid burns or  
clothing ignition. Heater will  
remain hot for a time after shut-  
down. Allow surface to cool  
before touching.  
DANGER:Carbonmonoxide  
poisoning may lead to death!  
Carefully supervise young chil-  
dren when they are in the same  
room with heater.  
Carbon Monoxide Poisoning: Early signs of  
carbon monoxide poisoning resemble the flu, with  
headaches, dizziness or nausea. If you have these  
signs, the heater may not be working properly. Get  
fresh air at once! Have heater 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.  
Make sure grill guard is in place  
before running heater.  
Keep the appliance area clear  
and free from combustible ma-  
terials, gasoline and other flam-  
mable vapors and liquids.  
Natural and Propane/LP Gas: Natural and Pro-  
pane/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.  
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) in-  
side any structure. Locate propane/LP supply  
tank(s) outdoors.  
Make certain you read and understand all warn-  
ings. Keep this manual for reference. It is your  
guide to safe and proper operation of this heater.  
3. Do not install 10,000 Btu/hr units in a bath-  
room (6,000 Btu/hr heaters are allowed in a  
bathroom).  
WARNING: Any change to  
this heater or its controls can  
be dangerous.  
4. 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  
neighborʼs phone. Follow the gas supplierʼs  
instructions  
WARNING: Do not use a  
blower insert, heat exchanger  
insertorotheraccessorynotap-  
proved for use with this heater.  
• If you cannot reach your gas supplier, call  
the fire department  
117001-01A  
3
 
SAFETY INFORMATION  
PRODUCT  
Continued  
IDENTIFICATION  
5. This heater needs fresh, outside air ventilation  
to run properly. This heater has an Oxygen  
Depletion Sensing (ODS) safety shutoff  
system. The ODS shuts down the heater if  
not enough fresh air is available. See Air for  
Combustion and Ventilation, page 5.  
Control Knob  
Ignitor Button  
Grill  
Guard  
6. Keep all air openings in the front and bottom  
of heater clear and free of debris. This will  
insure enough air for proper combustion.  
Glass  
Panel  
7. If heater shuts off, do not relight until you  
provide fresh, outside air. If heater keeps  
shutting off, have it serviced.  
Heater  
Cabinet  
Front  
Panel  
8. Do not run heater  
• where flammable liquids or vapors are used  
or stored  
• under dusty conditions  
Figure 1 - Vent-Free Gas Heater  
UNPACKING  
9. Do not use heater if any part has been under  
water. Immediately call a qualified service  
technician to inspect the room heater and to  
replace any part of the control system and any  
gas control which has been under water.  
1. Remove heater from carton.  
2. Remove all protective packaging applied to  
heater for shipment.  
3. Check heater for any shipping damage. If  
heater is damaged, promptly return to where  
you bought heater.  
10. Turn off heater and let cool before servicing.  
Only a qualified service person should service  
and repair heater.  
PRODUCT FEATURES  
SAFETY DEVICE  
11. Operating heater above elevations of 4,500  
feet (1,371 m) could cause pilot outage.  
12. To prevent performance problems, do not use This heater has a pilot with an Oxygen Deple-  
propane/LP fuel tank of less than 100 lbs.  
(45 kg) capacity.  
tion 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.  
13. Before using furniture polish, wax, carpet  
cleaner or similar products, turn heater off. If  
heated, the vapors from these products may  
create a white powder residue within burner  
box or on adjacent walls or furniture.  
PIEZO IGNITION SYSTEM  
This heater has a piezo ignitor. This system re-  
quires no matches, batteries or other sources to  
light heater.  
14. Provide adequate clearances around air  
openings.  
THERMOSTATIC HEAT CONTROL  
(Thermostat Models Only)  
Thermostat models have a thermostat sensing  
bulb and a control valve. This results in the great-  
est heater comfort. This can also result in lower  
gas bills.  
LOCAL CODES  
Install and use heater with care. Follow all local  
codes. In the absence of local codes, use the lat-  
est 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  
4
117001-01A  
 
Unusually Tight Construction  
AIR FOR COMBUSTION  
AND VENTILATION  
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.  
WARNING: This heater shall  
not be installed in a confined  
space or unusually tight con-  
struction unless provisions are  
provided for adequate combus-  
tionandventilationair. Readthe  
following instructions to insure  
proper fresh air for this and  
other fuel-burning appliances  
in your home.  
Unusually tight construction is defined as  
construction where:  
a. walls and ceilings exposed to the out-  
side atmosphere have a continuous  
water vapor retarder with a rating of  
one perm (6 x 10-11 kg per pa-sec-m2) or  
less with openings gasketed or sealed  
and  
b. weather stripping has been added on  
openable windows and doors and  
Todayʼs homes are built more energy efficient  
than ever. New materials, increased insulation and  
new construction methods help reduce heat loss  
in homes. Home owners weather strip and caulk  
around windows and doors to keep the cold air out  
and the warm air in. During heating months, home  
owners want their homes as airtight as possible.  
c. caulking or sealants are applied to  
areas such as joints around window  
and door frames, between sole plates  
and floors, between wall-ceiling joints,  
between wall panels, at penetrations  
for plumbing, electrical and gas lines  
and at other openings.  
While it is good to make your home energy effi-  
cient, your home needs to breathe. Fresh air must  
enter your home.All fuel-burning appliances need  
fresh air for proper combustion and ventilation.  
If your home meets all of these three cri-  
teria, you must provide additional fresh  
air. See Ventilation Air From Outdoors,  
page 7.  
Exhaust fans, fireplaces, clothes dryers and fuel  
burning appliances draw air from the house to  
operate. You must provide adequate fresh air for  
these appliances. This will insure proper venting  
of vented fuel-burning appliances.  
If your home does not meet all of the  
three criteria above, proceed to Determin-  
ing Fresh-Air Flow For Heater Location,  
page 6.  
Confined and Unconfined Space  
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.  
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 m3 per kw) of the aggregate input  
rating of all appliances installed in that space and  
an unconfined space as a space whose volume is  
not less than 50 cubic feet per 1,000 Btu per hour  
(4.8 m3 per kw) of the aggregate input rating of  
all appliances installed in that space. Rooms com-  
municating directly with the space in which the  
appliances are installed*, through openings not  
furnished with doors, are considered a part of the  
unconfined space.  
All spaces in homes fall into one of the three fol-  
lowing 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.  
* Adjoining rooms are communicating only if  
there are doorless passageways or ventilation grills  
between them.  
117001-01A  
5
 
The space in the above example is a confined space  
because the actual Btu/Hr used is more than the maxi-  
mum Btu/Hr the space can support. You must provide  
additional fresh air. Your options are as follows:  
AIR FOR COMBUSTION  
AND VENTILATION  
Continued  
A. Rework worksheet, adding the space of an  
adjoining room. If the extra space provides an  
unconfined space, remove door to adjoining  
room or add ventilation grills between rooms.  
See Ventilation Air From Inside Building.  
DETERMINING FRESH-AIR FLOW  
FOR HEATER LOCATION  
Determining if You Have a Confined or  
Unconfined Space  
Use this work sheet to determine if you have a  
B. Vent room directly to the outdoors. See Ventila-  
tion Air From Outdoors, page 7.  
confined or unconfined space.  
C. Install a lower Btu/Hr heater, if lower Btu/Hr size  
makes room unconfined.  
Space: Includes the room in which you will install  
heater plus any adjoining rooms with doorless pas-  
sageways or ventilation grills between the rooms.  
If the actual Btu/Hr used is less than the maximum  
Btu/Hr the space can support, the space is an un-  
confined space. You will need no additional fresh  
air ventilation.  
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. (6.1 m) (length) x 16  
ft. (4.88 m) (width) x 8 ft. (2.44 m) (ceiling height)  
= 2560 cu. ft. (72.49 m3) (volume of space)  
WARNING: If the area in  
which the heater may be oper-  
ated is smaller than that defined  
as an unconfined space or if the  
building is of unusually tight  
construction, provide adequate  
combustion and ventilation air  
byoneofthemethodsdescribed  
in the National Fuel Gas Code,  
ANSIZ223.1/NFPA54Section5.3  
or applicable local codes.  
If additional ventilation to adjoining room is  
supplied with grills or openings, add the volume  
of these rooms to the total volume of the space.  
2. Multiply the space volume by 20 to determine  
the maximum Btu/Hr the space can support.  
__________ (volume of space) x 20 = (Maxi-  
mum Btu/Hr the space can support)  
Example: 2,560 cu. ft. (72.49 m3) (volume of  
space) x 20 = 51,200 (maximum Btu/Hr the space  
can support)  
3. Add the Btu/Hr of all fuel burning appliances in  
the space.  
VENTILATION AIR  
Vent-free heater  
Gas water heater*  
Gas furnace  
___________ Btu/Hr  
___________ Btu/Hr  
___________ Btu/Hr  
___________ Btu/Hr  
___________ Btu/Hr  
Ventilation Air From Inside Building  
This fresh air would come from an adjoining  
unconfined space. When ventilating to an adjoin-  
ing unconfined space, you must provide two  
permanent openings: one within 12" (30.5 cm)  
of the ceiling and one within 12" (30.5 cm) of the  
floor on the wall connecting the two spaces (see  
options 1 and 2, Figure 2, page 7). You can also  
remove door into adjoining room (see option 3,  
Figure 2, page 7). 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.  
Vented gas heater  
Gas fireplace logs  
Other gas appliances* + __________ Btu/Hr  
Total = __________ Btu/Hr  
* Do not include direct-vent gas appliances. Di-  
rect-vent draws combustion air from the outdoors  
and vents to the outdoors.  
Example:  
50,000  
___________ Btu/Hr  
10,000  
+ __________ Btu/Hr  
60,000  
= __________ Btu/Hr  
Gas water heater  
Vent-free heater  
Total  
4. Compare the maximum Btu/Hr the space can  
support with the actual amount of Btu/Hr used.  
__________Btu/Hr (maximum the space can support)  
__________Btu/Hr (actual amount of Btu/Hr used)  
Example: 51,200 Btu/Hr (maximum the space  
can support)  
60,000 Btu/Hr (actual amount of  
Btu/Hr used)  
6
117001-01A  
 
AIR FOR COMBUSTION  
INSTALLATION  
AND VENTILATION  
NOTICE:Thisheaterisintended  
for use as supplemental heat.  
Use this heater along with your  
primary heating system. Do not  
install this heater as your pri-  
mary heat source. If you have a  
centralheatingsystem,youmay  
run system’s circulating blower  
whileusingheater.Thiswillhelp  
circulatetheheatthroughoutthe  
house. In the event of a power  
outage, you can use this heater  
as your primary heat source.  
Continued  
12"  
Ventilation Grills  
Into Adjoining Room,  
Ventilation  
Option 2  
Grills  
into Adjoining  
Room,  
Or  
Remove  
Door into  
Adjoining  
Room,  
Option 1  
Option 3  
12"  
WARNING: A qualified ser-  
vice person must install heater.  
Follow all local codes.  
CHECK GAS TYPE  
Figure 2 - Ventilation Air from Inside  
Building  
Use only the correct type of gas (natural or pro-  
pane/LP). If your gas supply is not the correct gas  
type, do not install heater. Call dealer where you  
bought heater for proper type heater.  
Ventilation Air From Outdoors  
Provide extra fresh air by using ventilation grills  
or ducts. You must provide two permanent open-  
ings: one within 12" (30.5 cm) of the ceiling and  
one within 12" (30.5 cm) of the floor. Connect  
these items directly to the outdoors or spaces  
open to the outdoors. These spaces include attics  
and crawl spaces. Follow the National Fuel Gas  
Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for  
Combustion and Ventilation for required size of  
ventilation grills or ducts.  
WARNING: This appliance  
is equipped for (natural or pro-  
pane/LP) gas. Field conversion  
is not permitted.  
INSTALLATION ITEMS  
Before installing heater, make sure you have the  
items listed below.  
IMPORTANT: Do not provide openings for inlet  
or outlet air into attic if attic has a thermostat-  
controlled power vent. Heated air entering the attic  
will activate the power vent.  
for propane/LPgas, external regulator (supplied  
by installer)  
piping (check local codes)  
sealant (resistant to propane/LP gas)  
equipment shutoff valve *  
ground joint union  
Ventilated  
Outlet  
Attic  
Air  
Outlet  
sediment trap  
Air  
To Attic  
tee joint  
pipe wrench  
To  
Crawl  
Space  
for natural gas, test gauge connection*  
* ACSAdesign-certified equipment shutoff valve  
with 1/8" NPT tap is an acceptable alternative to  
test gauge connection. The optional CSA design-  
certified equipment shutoff valve can be purchased  
from your dealer. See Accessories, page 25.  
Inlet  
Air  
Ventilated  
Crawl Space  
Inlet Air  
Figure 3 - Ventilation Air from Outdoors  
117001-01A  
7
 
INSTALLATION  
CAUTION: If you install the  
heater in a home garage  
• heater pilot and burner must  
be at least 18" (45.7 cm) above  
floor  
Continued  
LOCATING HEATER  
This heater is designed to be mounted on a wall.  
WARNING: Maintain the  
minimum clearances shown  
in Figure 4. If you can, provide  
greater clearances from floor,  
ceiling and joining wall.  
• locate heater where moving  
vehicle will not hit it  
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, but  
not limited to, tobacco smoke,  
aromatic candles, cleaning flu-  
ids,oilorkerosenelamps,etc.)in  
the air exist, may discolor walls  
or cause odors.  
WARNING: Never install the  
heater  
• in a bathroom (10,000 Btu/hr  
only. 6,000 Btu/hr models are  
allowed in a bathroom. Check  
local codes.)  
• in a recreational vehicle  
• where curtains, furniture,  
clothing or other flammable  
objects are less than 36"  
(91.5 cm) from the front, top  
or sides of the heater  
IMPORTANT: Vent-free heaters add moisture 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 Combustion and Ventilation, page 5. If high hu-  
midity is experienced, a dehumidifier may be used  
to help lower the water vapor content in the air.  
• as a fireplace insert  
• in high traffic areas  
• in windy or drafty areas  
CEILING  
For convenience and efficiency, install heater  
where there is easy access for operation, inspec-  
tion and service  
36" (91.5 cm)  
6"  
Minimum  
(15.3 cm)  
in coldest part of room  
Minimum  
From  
Sides Of  
Heater  
THERMOSTAT SENSING BULB  
(Thermostat Models Only)  
The thermostat sensing bulb is located inside the  
heater. Do not move this bulb during installation  
or operation of the heater.  
Right  
Side  
Left  
Side  
INSTALLING HEATER TO WALL  
Marking Screw Locations  
1. Determine where you will locate heater.  
3" (7.7 cm)  
Minimum To Top Surface  
Of Carpeting, Tile Or Other  
Combustible Material  
WARNING: Maintain mini-  
mumclearancesshowninFigure  
5, page 9. If you can, provide  
greater clearances from floor  
and joining wall.  
Figure 4 - Mounting Clearances As  
Viewed From Front of Heater  
2. Mark two mounting screw locations on wall  
(see Figure 5, page 9).  
8
117001-01A  
 
Thin or  
INSTALLATION  
Thick Wall  
(thick wall  
shown)  
Continued  
7
3
8
4
8 / "  
7 / "  
(22.5 cm)  
Minimum To  
Maintain 6"  
(15.3 cm)  
Clearance  
From Wall  
(14.7 cm)  
1/16"  
(1.6 mm)  
Space  
1
4
20 / "  
Solid  
Wall  
(51.4 cm)  
Minimum To  
Maintain 3"  
(7.7 cm)  
Mounting  
Screw  
Locations  
Figure 8 - Tightening Anchors  
Placing Heater On Mounting Screws  
1. Locate two keyhole slots on back panel of  
heater (see Figure 9).  
Clearance  
From Floor  
2. Place large openings of slots over screwheads.  
Slide heater down until screws are in small  
portion of slots.  
FLOOR  
Figure 5 - Mounting Screw Locations  
Installing Two Mounting Screws  
Note: Wall anchors and mounting screws are  
in hardware package. The hardware package is  
provided with heater.  
Keyhole Slots  
Attaching to wall stud method  
For attaching mounting screw to wall stud  
1. Drill hole at marked location using 9/64"  
drill bit.  
Figure 9 - Location Of Keyhole Slots On  
Back Panel Of Heater  
2. Insert mounting screw into wall stud.  
Removing Front Panel Of Heater  
1. Remove two screws near bottom corners of  
front panel. See Figure 10.  
3. Tightenscrewuntil1/16"(1.6mm)space(thick-  
ness of penny) is between screwhead and wall.  
Attaching to wall anchor method  
2. Lift straight up on grill guard until it stops. Grill  
guard will slide up about 1/4" (6.4 mm).  
Follow instructions below to attach mounting  
screws to hollow walls (wall areas between studs)  
or solid walls (concrete or masonry).  
3. Pull bottom of front panel forward, then  
down.  
1. Drill holes at marked locations using 5/16"  
drill bit. For solid walls (concrete or masonry),  
drill at least 1 1/4" (3.2 cm) deep.  
2. Fold wall anchor (see Figure 6).  
3. Insert wall anchor (wings first) into hole. Tap  
anchor flush to wall.  
4. For thin walls [1/2" (1.3 cm) or less], insert red  
key into wall anchor. Push red key to “pop”  
open anchor wings (see Figure 7).  
IMPORTANT: Do not hammer key! For thick  
walls [over 1/2" (1.3 cm) thick] or solid walls,  
do not pop open wings.  
5. Tighten two screws until 1/16" (1.6 mm) space  
(thickness of penny) is between screwheads  
and wall (see Figure 8).  
Figure 10 - Removing Front Panel Of  
Heater  
Figure 6 - Folding  
Anchor  
Figure 7 - Popping  
Open Anchor Wings  
For Thin Walls  
117001-01A  
9
 
INSTALLATION  
WARNING: For natural  
gas, never connect heater to  
private (non-utility) gas wells.  
This gas is commonly known  
as wellhead gas.  
Continued  
Installing Bottom Mounting Screw  
1. Locate bottom mounting hole. This hole is  
near bottom on back panel of heater (see  
Figure 11).  
2. Mark screw location on wall.  
3. Remove heater from wall.  
IMPORTANT: For natural gas, check gas line  
pressure before connecting heater to gas line. Gas  
line pressure must be no greater than 10.5 inches of  
water. If gas line pressure is higher, heater regula-  
tor damage could occur.  
4. If installing bottom mounting screw into hol-  
low or solid wall, install wall anchor. Follow  
steps 1 through 5 under Attaching To Wall  
Anchor Method, page 9. If installing bottom  
mounting screw into wall stud, drill hole at  
marked location using 9/64" drill bit.  
CAUTION: For propane/LP  
gas, never connect heater di-  
rectly to the propane/LP supply.  
This heater requires an external  
regulator (not supplied). Install  
theexternalregulatorbetweenthe  
heater and propane/LP supply.  
5. Replace heater on wall.  
6. Insert bottom anchor screw through back  
panel into bottom anchor or drilled hole (see  
Figure 11).  
7. Tighten screw until heater is firmly secured to  
wall. Do not over tighten.  
Note: Do not replace front panel at this time.  
Replace front panel after making gas connec-  
tions and checking for leaks (see pages 10  
through 12).  
For propane/LP gas, the installer must supply an  
external regulator. The external regulator will  
reduce incoming gas pressure. You must reduce  
incoming gas pressure to between 11 and 14 inches  
of water. If you do not reduce incoming gas pres-  
sure, heater regulator damage could occur. Install  
the external regulator with the vent pointing down  
as shown in Figure 12. Pointing the vent down  
protects it from freezing rain or sleet.  
CAUTION: Use only new,  
black iron or steel pipe. Inter-  
nally-tinned copper tubing may  
be used in certain areas. Check  
your local codes. Use pipe of  
large enough diameter to allow  
proper gas volume to heater. If  
pipe is too small, undue loss of  
volume will occur.  
Figure 11 - Installing Bottom Mounting  
Screw  
CONNECTING TO GAS SUPPLY  
WARNING: This appliance  
requires a 3/8" NPT (National  
PipeThread)inletconnectionto  
the pressure regulator.  
Propane/LP  
External  
Supply Tank  
Regulator  
WARNING: A qualified ser-  
vicepersonmustconnectheater  
to gas supply. Follow all local  
codes.  
Vent  
Pointing  
Down  
Figure 12 - External Regulator With Vent  
Pointing Down (Propane/LP only)  
10  
117001-01A  
 
IMPORTANT: Hold the pressure regulator with  
wrench when connecting it to gas piping and/or  
fittings. Do not over tighten pipe connection to  
regulator. The regulator body could be damaged.  
INSTALLATION  
Continued  
Installation must include 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 13).  
CHECKING GAS CONNECTIONS  
WARNING:Testallgaspiping  
and connections, internal and  
external to unit, for leaks after  
installing or servicing. Correct  
all leaks at once.  
IMPORTANT: Install an equipment shutoff valve  
in an accessible location. The equipment shutoff  
valve is for turning on or shutting off the gas to  
the appliance.  
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 heater valves.  
WARNING: Never use an  
open flame to check for a leak.  
Applyanoncorrosiveleakdetec-  
tion fluid to all joints. Bubbles  
forming show a leak. Correct all  
leaks at once.  
WARNING: Use pipe joint  
sealant that is resistant to liquid  
petroleum (LP) gas.  
Install sediment trap in supply line as shown in  
Figure 13. Locate sediment trap where it is within  
reach for cleaning. Locate sediment 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.  
CAUTION: For propane/LP  
gas, make sure external regula-  
tor has been installed between  
propane/LP supply and heater.  
See guidelines under Connect-  
ing to Gas Supply, page 10.  
3/8" NPT  
Pipe  
Nipple  
PRESSURE TESTING GAS SUPPLY  
PIPING SYSTEM  
Pressure  
Regulator  
Test Pressures In Excess Of 1/2 PSIG  
(3.5 kPa)  
Ground  
Joint  
Union  
1. Disconnect appliance with its appliance main  
gas valve (control valve) and equipment  
shutoff valve from gas supply piping system.  
Pressures in excess of 1/2 psig will damage  
heater regulator.  
Heater  
Cabinet  
Equipment  
Shutoff  
Valve *  
Tee Joint  
Reducer  
Bushing to  
1/8" NPT  
2. Cap off open end of gas pipe where equipment  
shutoff valve was connected.  
Natural Gas  
From Gas  
Meter (7" W.C.  
to 10.5" W.C.  
Pressure)  
Propane/LP  
From External  
Regulator  
(11" W.C. to 14"  
W.C. Pressure)  
1/8" NPT  
Plug Tap  
3. Pressurize supply piping system by either  
opening propane/LP supply tank valve for  
propane/LP gas or opening main gas valve  
located on or near gas meter for natural gas  
or using compressed air.  
3"  
Min.  
4. Check all joints of gas supply piping system.  
Apply a noncorrosive leak detection fluid to  
all joints. Bubbles forming show a leak.  
Cap Pipe Tee  
Nipple Joint  
Sediment Trap  
5. Correct all leaks at once.  
Figure 13 - Gas Connection  
6. Reconnect heater and equipment shutoff  
valve to gas supply. Check reconnected fit-  
tings for leaks.  
* ACSAdesign-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 25.  
117001-01A  
11  
 
3. Make sure control knob of heater is in the OFF  
position.  
INSTALLATION  
Continued  
4. Check all joints from equipment shutoff valve  
to thermostat gas valve (see Figure 15 or 16).  
Apply a noncorrosive leak detection fluid to  
all joints. Bubbles forming show a leak.  
Test Pressures Equal To or Less Than  
1/2 PSIG (3.5 kPa)  
1. Close equipment shutoff valve (see Figure 14).  
2. Pressurize supply piping system by either  
opening propane/LP supply tank valve for  
propane/LP gas or opening main gas valve  
located on or near gas meter for natural gas  
or using compressed air.  
5. Correct all leaks at once.  
6. Light heater (see Operating Heater). Check  
all other internal joints for leaks.  
7. Turn off heater (see To Turn Off Gas to Appli-  
ance, page 13).  
3. Check all joints from gas meter for natural gas  
(see Figure 15) or propane/LP supply tank for 8. Replace front panel.  
propane/LP gas, to equipment shutoff valve  
OPERATING HEATER  
FOR YOUR SAFETY READ  
(see Figure 16). Apply a noncorrosive leak  
detection fluid to all joints. Bubbles forming  
show a leak.  
BEFORE LIGHTING  
4. Correct all leaks at once.  
PRESSURE TESTING HEATER GAS  
CONNECTIONS  
1. Open equipment shutoff valve (see Figure 14).  
WARNING: If you do not fol-  
low these instructions exactly,  
a fire or explosion may result  
causing property damage, per-  
sonal injury or loss of life.  
2. For natural gas open main gas valve located  
on or near gas meter. For propane/LPgas open  
propane/LP supply tank valve.  
Open  
Equipment  
Shutoff Valve  
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.  
Closed  
Figure 14 - Equipment Shutoff Valve  
WHAT TO DO IF YOU SMELL GAS  
Control  
Valve  
Location  
• Do not try to light any appliance.  
• Do not touch any electric switch; do not  
use any phone in your building.  
Gas  
Meter  
• Immediately call your gas supplier from  
a neighborʼs phone. Follow the gas  
supplierʼs instructions.  
Equipment  
Shutoff  
Valve  
• If you cannot reach your gas supplier, call  
the fire department.  
C. Use only your hand to push in or turn the  
gas control knob. Never use tools. If the  
knob will not push in or turn by hand,  
donʼt try to repair it, call a qualified service  
technician. Force or attempted repair may  
result in a fire or explosion.  
Figure 15 - Checking Gas Joints for  
Natural Gas  
Propane/LP  
Supply Tank  
Control  
Valve  
Location  
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.  
Equipment  
Shutoff  
Valve  
Figure 16 - Checking Gas Joints for  
Propane/LP Gas  
12  
117001-01A  
 
OPERATING HEATER  
WARNING: Always operate  
manual control heaters at the  
locked positions. Operation  
between these positions may  
create a possible health hazard  
if used in a poorly ventilated  
room. Read owner’s manual for  
complete instructions.  
Continued  
LIGHTING  
INSTRUCTIONS  
1. STOP! Read the safety information, page 12.  
2. Make sure equipment shutoff valve is fully  
open.  
3. Turn off any electric power to the appliance  
if service is to be performed.  
4. Turn control knob clockwise  
OFF position.  
to the  
CAUTION: Do not try to ad-  
just heating levels by using the  
equipment shutoff valve.  
5. Wait five minutes to clear out any gas. Then  
smell for gas, including near the floor. If you  
smell gas, STOP! Follow “B” in the safety  
information, page 12. If you donʼt smell gas,  
go to the next step.  
Control  
Ignitor Button  
Knob  
6. Thermostat Models: Turn control knob  
counterclockwise  
to the PILOT  
position. Press in control knob for five (5)  
seconds.  
Figure 17 - Control Knob In The OFF  
Position for Manual Control Models  
Manual Models: Press in and turn control  
knob counterclockwise  
to the PILOT  
Ignitor  
Button  
position. Keep control knob pressed in for  
five (5) seconds.  
Control  
Knob  
T
O
L
I
P
F
F
O
7. With control knob pressed in, push down  
and release ignitor button. This will light  
pilot. The pilot is attached to the front of  
burner. Note: You may be running this  
heater for the first time after hooking up to  
gas supply. If so, you may need to press in  
control knob for 30 seconds or more. This  
will allow air to bleed from the gas system.  
If needed, keep pressing ignitorbutton until  
pilot lights. If ignitor does not light pilot,  
refer to Troubleshooting, page 16 or contact  
a qualified service person orgas supplierfor  
repairs. Until repairs are made, light pilot  
with match. To light pilot with match, see  
Manual Lighting Procedure, page 14.  
Figure 18 - Control Knob In The OFF  
Position for Thermostat Models  
Ignitor Electrode  
Thermocouple  
Pilot  
Burner  
Figure 19 - Pilot  
8. Keep control knob pressed in for30 seconds  
after lighting pilot.After 30 seconds, release  
control knob.  
TO TURN OFF GAS  
TO APPLIANCE  
• If control knob does not pop up when Shutting Off Heater  
released, contact a qualified service person 1. Turn control knob clockwise  
to the  
or gas supplier for repairs.  
OFF position.  
Note: If pilot goes out, repeat steps 4 thru 7.  
Thermostat models have a safety interlock  
system. Wait one (1) minute before lighting  
pilot again.  
2. Turn off all electric power to the appliance  
if service is to be performed.  
Shutting Off Burner Only (pilot stays lit)  
Turn control knob clockwise  
to the  
9. Turn control knob counterclockwise  
to desired heating level. The main burner  
should light. Manual control heaters should  
be used in locked positions.  
PILOT position.  
117001-01A  
13  
 
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.  
OPERATING HEATER  
Continued  
THERMOSTAT CONTROL  
OPERATION  
Blue Flame  
Pilot Burner  
The thermostatic control used on these models  
differs from standard thermostats. Standard  
thermostats simply turn on and off the burner.  
The thermostat used on this heater senses the  
room temperature. At times the room may  
exceed the set temperature. If so, the burner  
will shut off. The burner will cycle back on  
when room temperature drops below the set  
temperature. The control knob can be set to  
any heat level between 1 and 5. This adjusts the  
amount of gas flow to the burner that increases  
or decreases the burner flame height.  
Thermocouple  
Figure 20 - Correct Pilot Flame Pattern  
Yellow Flame  
Pilot Burner  
Thermocouple  
Note: The thermostat sensing bulb measures  
the temperature of air near the heater cabinet.  
This may not always agree with room tem-  
perature (depending on housing construction,  
installation location, room size, open air tem-  
peratures, etc.) Frequent use of your heater will  
let you determine your own comfort levels.  
Figure 21 - Incorrect Pilot Flame Pattern  
BURNER FLAME PATTERN  
Figure 22, page 15, shows a correct burner flame  
pattern. Figure 23, page 15, shows an incorrect  
burneramepattern.Theincorrectburneramepat-  
ternshowsyellowtippingoftheame. Italsoshows  
the flame higher than 1/2 the glass panel height.  
MANUAL LIGHTING  
PROCEDURE  
1. Remove front panel (see Figure 10, page 9).  
2. Follow steps 1 through 7 under Lighting  
Instructions, page 13.  
WARNING: If yellow tipping  
occurs, your heater could pro-  
duce increased levels of car-  
bon monoxide. If burner flame  
pattern shows yellow tipping,  
proceed with the following in-  
structions.  
3. With control knob pressed in, strike match.  
Hold match to pilot until pilot lights.  
4. Keep control knob pressed in for30 seconds  
after lighting pilot.After 30 seconds, release  
control knob. Now follow step 9, under  
Lighting Instructions, page 13.  
5. Replace front panel.  
NOTICE: Do not mistake orange  
flames with yellow tipping. Dust  
or other fine particles enter the  
heater and burn causing brief  
patches of orange flame.  
INSPECTING HEATER  
Check pilot flame pattern and burner flame pat-  
tern often.  
PILOT FLAME PATTERN  
Figure 20 shows a correct pilot flame pattern.  
Figure 21 shows an incorrect pilot flame pattern.  
The incorrect pilot flame is not touching the  
thermocouple. This will cause the thermocouple  
to cool. When the thermocouple cools, the heater  
will shut down.  
If burner flame pattern is incorrect, as shown in  
Figure 23, page 15,  
turn heater off (see To Turn Off Gas to Appli-  
ance, page 13)  
see Troubleshooting, page 16  
If pilot flame pattern is incorrect, as shown in  
Figure 21  
turn heater off (see To Turn Off Gas to Appli-  
ance, page 13)  
see Troubleshooting, page 16  
14  
117001-01A  
 
BURNER PILOT AIR INLET  
INSPECTING HEATER  
The primary air inlet holes allow the proper  
amount of air to mix with the gas. This provides a  
clean burning flame. Keep these holes clear of dust,  
dirt and lint. Clean these air inlet holes prior to each  
heating season. Blocked air holes will create soot.  
We recommend that you clean the unit every three  
months during operation and have heater inspected  
yearly by a qualified service person.  
Continued  
1/2 GLASS HEIGHT  
(Models GWN6 and GWP6 will be lower due to  
lower input rating)  
We also recommend that you keep the burner  
tube and pilot assembly clean and free of dust and  
dirt. To clean these parts we recommend using  
compressed air no greater than 30 PSI. Your local  
computer store, hardware store or home center  
may carry compressed air in a can. You can use a  
vacuum cleaner in the blow position. If using com-  
pressed air in a can, please follow the directions on  
the can. If you don't follow directions on the can,  
you could damage the pilot assembly.  
Figure 22 - Correct Burner Flame Pattern  
Yellow  
Tipping  
1/2 GLASS HEIGHT  
Figure 23 - Incorrect Burner Flame  
Pattern  
1. Shut off the unit, including the pilot. Allow  
the unit to cool for at least thirty minutes.  
2. Inspect burner, pilot for dust and dirt.  
CLEANING AND  
MAINTENANCE  
3. Blow air through the ports/slots and holes in  
the burner.  
4. Never insert objects into the pilot tube.  
WARNING: Turn off heater  
and let cool before cleaning.  
Clean the pilot assembly also. A yellow tip on the  
pilot flame indicates dust and dirt in the pilot as-  
sembly. There is a small pilot air inlet about two  
inches from where the pilot flame comes out of  
the pilot assembly (see Figure 24). With the unit  
off, lightly blow air through the air inlet. You may  
blow through a drinking straw if compressed air  
is not available.  
CAUTION: You must keep  
control areas, burner and circu-  
latingairpassagewaysofheater  
clean. Inspect these areas of  
heater before each use. Have  
heater inspected yearly by a  
qualifiedserviceperson. Heater  
may need more frequent clean-  
ing due to excessive lint from  
carpeting, beddingmaterial, pet  
hair, etc.  
Pilot Assembly  
Pilot Air Inlet  
Figure 24 - Pilot Air Inlet Hole  
CABINET  
WARNING: Failure to keep  
the primary air opening(s) of  
theburner(s)cleanmayresultin  
sooting and property damage.  
Air Passageways  
Use a vacuum cleaner or pressurized air to  
clean.  
ODS/PILOT AND BURNER  
Use a vacuum cleaner, pressurized air or small,  
soft bristled brush to clean.  
Exterior  
Use a soft cloth dampened with a mild soap and  
water mixture. Wipe the cabinet to remove dust.  
117001-01A  
15  
 
TROUBLESHOOTING  
WARNING:Turnoffandunplugheaterandletcoolbeforeservicing.  
Only a qualified service person should service and repair heater.  
CAUTION: Never use a wire, needle or similar object to clean  
ODS/pilot. This can damage ODS/pilot unit.  
Note: All troubleshooting items are listed in order of operation.  
OBSERVED PROBLEM POSSIBLE CAUSE  
REMEDY  
When ignitor button is pressed 1. Ignitor electrode positioned 1. Replace pilot assembly  
in, there is no spark at ODS/  
pilot  
wrong  
2. Ignitor electrode broken  
2. Replace pilot assembly  
3. Ignitor electrode not connected 3. Reconnect ignitor cable  
to ignitor cable  
4. Ignitor cable pinched or wet  
4. Free ignitor cable if pinched  
by any metal or tubing. Keep  
ignitor cable dry  
5. Broken ignitor cable  
6. Bad piezo ignitor  
7. Piezo ignitor nut is loose  
5. Replace ignitor cable  
6. Replace piezo  
7. Tighten nut holding piezo  
ignitor. Nut is located inside  
heater cabinet at top  
When ignitor button is pressed 1. Gas supply turned off or equip- 1. Turn on gas supply or open  
in, there is a spark at ODS/Pilot  
but no ignition  
ment shutoff valve closed  
2. Control knob not in PILOT 2. Turn control knob to PILOT  
position position  
3. Control knob not pressed in 3. Press in control knob while in  
while in PILOT position PILOT position  
4. Air in gas lines when in- 4. Continue holding down con-  
equipment shutoff valve  
stalled  
trol knob. Repeat igniting  
operation until air is removed  
5. Depleted gas supply (propane/ 5. Contact local propane/LP gas  
LP only)  
6. ODS/pilot is clogged  
company  
6. Clean ODS/pilot (see Cleaning  
and Maintenance, page 15) or  
replace ODS/pilot assembly  
7. Gas regulator setting is not 7. Replace gas regulator  
correct  
16  
 
117001-01A  
TROUBLESHOOTING  
Continued  
OBSERVED PROBLEM POSSIBLE CAUSE  
REMEDY  
ODS/pilot lights but flame 1. Control knob not fully pressed in 1. Press in control knob fully  
goes out when control knob is 2. Control knob not pressed in 2. After ODS/pilot lights, keep  
released  
long enough  
control knob pressed in 30  
seconds  
3. Equipment shutoff valve not 3. Fully open equipment shutoff  
fully open valve  
4. Thermocouple connection 4. Hand tighten until snug, then  
loose at control valve tighten 1/4 turn more  
5. Pilot flame not touching ther- 5. A) Contact local natural or  
mocouple, which allows ther-  
mocouple to cool, causing  
pilot flame to go out. This  
problem could be caused by  
one or both of the following:  
A)Low gas pressure  
propane/LP gas company  
B) Clean ODS/pilot (see  
Cleaning and Maintenance,  
page 15) or replace ODS/pilot  
assembly  
B)Dirty or partially clogged  
ODS/pilot  
6. Thermocouple damaged  
7. Control valve damaged  
6. Replace pilot assembly  
7. Replace control valve  
Burner does not light after 1. Burner orifice is clogged  
ODS/pilot is lit  
1. Cleanburnerorifice(seeClean-  
ing and Maintenance, page 15)  
or replace burner orifice  
2. Inlet gas pressure is too low  
2. Contact local natural or pro-  
pane/LP gas company  
Delayed ignition of burner  
1. Manifold pressure is too low 1. Contact local natural or pro-  
pane/LP gas company  
2. Burner orifice is clogged  
2. Cleanburnerorifice(seeClean-  
ing and Maintenance, page 15)  
or replace burner orifice  
Burner backfiring during com- 1. Burner orifice is clogged or 1. Cleanburnerorifice(seeClean-  
bustion  
damaged  
ing and Maintenance, page 15)  
or replace burner orifice  
2. Replace burner  
2. Burner damaged  
3. Gas regulator defective  
3. Replace gas regulator  
117001-01A  
17  
 
TROUBLESHOOTING  
Continued  
OBSERVED PROBLEM POSSIBLE CAUSE  
REMEDY  
Yellow flame during burner 1. Not enough air  
combustion  
1. Check burner for dirt and de-  
bris. If found, clean burner (see  
Cleaning and Maintenance,  
page 15)  
2. Inlet gas pressure is too low  
3. Gas regulator defective  
2. Contact local natural or pro-  
pane/LP gas company  
3. Replace gas regulator  
Slight smoke or odor during 1. Residues from manufacturing 1. Problem will stop after a few  
initial operation processes hours of operation  
Heater produces a whistling 1. Turning control knob to high- 1. Turn control knob to lowest  
noise when burner is lit  
est position when burner is  
cold  
2. Air in gas line  
position and let warm up for a  
minute  
2. Operate burner until air is  
removed from line. Have gas  
checked by local natural or  
propane/LP gas company  
3. Air passageways on heater 3. Observe minimum installation  
blocked clearances (see Figure 4, page 8)  
4. Dirty or partially clogged 4. Clean burner (see Cleaning  
burner orifice  
and Maintenance, page 15) or  
replace burner orifice  
Heaterproducesaclicking/tick- 1. Metal expanding while heating 1. Thisiscommonwithmostheat-  
ing noise just after burner is lit  
or shut off  
or contracting while cooling  
ers. Ifnoiseisexcessive, contact  
qualified service person  
White powder residue forming 1. When heated, vapors from 1. Turn heater off when using  
withinburnerboxoronadjacent  
walls or furniture  
furniture polish, wax, carpet  
cleaner, etc., may turn into  
white powder residue  
furniture polish, wax, carpet  
cleaners or similar products  
18  
117001-01A  
 
TROUBLESHOOTING  
Continued  
WARNING: If you smell gas  
• Shut off gas supply.  
• Do not try to light any appliance.  
Do not touch any electrical switch; do not use any phone in your building.  
• Immediately call your gas supplier from a neighbor’s phone. Fol-  
low the 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 unwanted 1. Heater burning vapors from 1. Ventilate room. Stop using  
odors  
paint, hair spray, glues, etc. See  
IMPORTANT statement above  
2. Low fuel supply (propane/LP 2. Refill supply tank  
odor causing products while  
heater is running  
gas only)  
3. Gas leak. See Warning 3. Locate and correct all leaks  
statement at top of page  
(see Checking Gas Connec-  
tions, page 11)  
Heater shuts off in use (ODS 1. Not enough fresh air is avail- 1. Open window and/or door for  
operates)  
able  
2. Low line pressure  
ventilation  
2. Contact local natural or pro-  
pane/LP gas company  
3. ODS/pilot is partially 3. CleanODS/pilot(seeCleaning  
clogged and Maintenance, page 15)  
Gas odor even when control 1. Gas leak. See Warning 1. Locate and correct all leaks  
knob is in OFF position  
statement at top of page  
(see Checking Gas Connec-  
tions, page 11)  
2. Replace control valve  
2. Control valve defective  
Gas odor during combustion  
1. Foreign matter between con- 1. Take apart gas tubing and  
trol valve and burner remove foreign matter  
2. Gas leak. See Warning 2. Locate and correct all leaks  
statement at top of page  
(see Checking Gas Connec-  
tions, page 11)  
Moisture/condensation noticed 1. Not enough combustion/ven- 1. Refer to Air for Combustion  
on windows  
tilation air  
and Ventilation requirements  
(page 5)  
117001-01A  
19  
 
ILLUSTRATED PARTS BREAKDOWN  
MODELS GWP6, GWN6, GWP10 AND GWN10  
21  
22  
20  
23  
24  
19  
13  
12  
10  
15  
11  
9
4
10  
14  
17  
18  
8
7
6
16  
5
3
2
11  
11-1  
1
ODS/Pilot  
20  
 
117001-01A  
PARTS LIST  
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions  
listed under Replacement Parts on page 25 of this manual.  
KEY  
NO. PART NO.  
DESCRIPTION  
QTY  
2
1
1
2
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
098304-01 Screw, #10 x 3/8"  
099467-07 Front Panel  
099318-04 Grill Guard  
101108-01 Grill Guard Clip  
102017-02 Bottom Glass Retainer  
098260-11 Glass Panel  
099319-02 Top Glass Retainer  
099317-02 Deflector Unit  
098271-09 Ignitor Cable  
10 098249-01 Nut, M5  
11 110803-01* ODS/Pilot Assembly  
110803-02* ODS/Pilot Assembly  
11-1 110186-01 Thermocouple Kit  
12 104263-03 Burner  
104263-02 Burner  
13 099387-17 Pilot Tubing  
14 104259-01 Injector, 1 piece  
104259-02 Injector, 1 piece  
104259-03 Injector, 1 piece  
104259-04 Injector, 1 piece  
15 NJF-8C  
Hex Nut  
16 099415-17 Pressure Regulator  
099415-18 Pressure Regulator  
17 099462-01 Burner Tubing  
18 099391-02 Regulator Tubing  
19 099413-01 Control Valve  
099413-02 Control Valve  
20  
**  
Cabinet Assembly  
21 097159-04 Piezo Ignitor  
22 099393-02 Control Knob  
23 098508-01 Valve Retainer Nut  
24 099818-01 Internal Tooth Washer  
PARTS AVAILABLE - NOT SHOWN  
100642-02 Assembly, Hardware  
** Not a field replaceable part.  
1
* If replacing ODS pilot and your model is pre 2002, your part  
number will be 100701-03 for natural gas models, 099059-03  
for propane/LP models. The thermocouple part number will be  
098514-01 for both gases. The electrode part number will be  
098594-01 for both gases.  
117001-01A  
21  
 
ILLUSTRATED PARTS BREAKDOWN  
MODELS GWP10T AND GWN10T  
21  
20  
19  
9
13  
15  
12  
18  
11  
9
4
17  
10  
13  
14  
8
7
6
16  
5
2
3
11  
1
11-1  
ODS/Pilot  
22  
 
117001-01A  
PARTS LIST  
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions  
listed under Replacement Parts on page 25 of this manual.  
KEY  
NO. PART NO.  
DESCRIPTION  
QTY.  
2
1
1
2
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
098304-01 Screw, #10 x 3/8"  
099467-07 Front Panel Assembly  
099318-04 Grill Guard  
101108-01 Grill Guard Clip  
102017-02 Bottom Glass Retainer  
098260-11 Glass Panel  
099319-02 Top Glass Retainer  
099317-02 Deflector Unit  
098271-09 Ignitor Cable  
10 098249-01 Nut, M5  
11  
110803-01* ODS/Pilot Assembly  
110803-02* ODS/Pilot Assembly  
11-1 110186-01 Thermocouple Kit  
12 104263-03 Burner  
13 099387-11 Pilot Tubing  
14 104259-05 Injector, 1 Piece  
104259-06 Injector, 1 Piece  
15 NJF 8C  
16 099415-17 Pressure Regulator  
099415-18 Pressure Regulator  
17 104261-01 Burner Tubing  
18 104264-01 Regulator Tubing  
19 098522-11 Thermostat Gas Valve  
098522-18 Thermostat Gas Valve  
Hex Nut  
20  
**  
Cabinet Assembly  
21 097159-04 Piezo Ignitor  
PARTS AVAILABLE - NOT SHOWN  
100642-02 Assembly, Hardware  
** Not a field replaceable part.  
1
* If replacing ODS pilot and your model is pre 2002, your  
part number will be 100701-03 for natural gas models,  
099059-03 for propane/LPmodels. The thermocouple part  
number will be 098514-01 for both gases. The electrode  
part number will be 098594-01 for both gases.  
117001-01A  
23  
 
GWN10  
SPECIFICATIONS  
5,000/10,000 Btu/hr (Variable)  
GWP6  
Natural Gas  
4,400/6,000 Btu/hr (Variable)  
Piezo Ignition  
Propane/LP Gas  
Pressure Regulator Setting - 3" W.C.  
Piezo Ignition  
Inlet Gas Pressure (inches of water)  
Maximum - 10.5", Minimum - 5"  
Pressure Regulator Setting - 8" W.C.  
Inlet Gas Pressure (inches of water)  
Maximum - 14", Minimum - 11"  
Heater Dimensions (H x W x D)  
21.5" x 13.5" x 7" (54.6 x 34.3 x 17.8 cm)  
Heater Dimensions (H x W x D)  
21.5" x 13.5" x 7" (54.6 x 34.3 x 17.8 cm)  
Carton Dimensions (H x W x D)  
25" x 16.75" x 7.75" (63.5 x 42.5 x 19.7 cm)  
Carton Dimensions (H x W x D)  
25" x 16.75" x 7.75" (63.5 x 42.5 x 19.7 cm)  
Heater Weight - 12.5 lb (5.7 kg)  
Heater Shipping Weight - 14 lb (6.4 kg)  
Heater Weight - 12.5 lb (5.7 kg)  
GWP10T  
Heater Shipping Weight - 14 lb (6.4 kg)  
5,000/10,000 Btu/hr (Variable)  
GWN6  
Propane/LP Gas  
4,400/6,000 Btu/hr (Variable)  
Piezo Ignition  
Natural Gas  
Pressure Regulator Setting - 8" W.C.  
Piezo Ignition  
Inlet Gas Pressure (inches of water)  
Maximum - 14", Minimum - 11"  
Pressure Regulator Setting - 3" W.C.  
Inlet Gas Pressure (inches of water)  
Maximum - 10.5", Minimum - 4"  
Heater Dimensions (H x W x D)  
22" x 13.5" x 7" (55.9 x 34.3 x 17.8 cm)  
Heater Dimensions (H x W x D)  
21.5" x 13.5" x 7" (54.6 x 34.3 x 17.8 cm)  
Carton Dimensions (H x W x D)  
25" x 16.75" x 7.75" (63.5 x 42.5 x 19.7 cm)  
Carton Dimensions (H x W x D)  
25" x 16.75" x 7.75" (63.5 x 42.5 x 19.7 cm)  
Heater Weight - 13.5 (6.1 kg)  
Heater Shipping Weight - 15 lb (6.8 kg)  
Heater Weight - 12.5 lb (5.7 kg)  
GWN10T  
Heater Shipping Weight - 14 lb (6.4 kg)  
5,000/10,000 Btu/hr (Variable)  
GWP10  
Natural Gas  
5,000/10,000 Btu/hr (Variable)  
Piezo Ignition  
Propane/LP Gas  
Pressure Regulator Setting - 3" W.C.  
Piezo Ignition  
Inlet Gas Pressure (inches of water)  
Maximum - 10.5", Minimum - 5"  
Pressure Regulator Setting - 8" W.C.  
Inlet Gas Pressure (inches of water)  
Maximum - 14", Minimum - 11"  
Heater Dimensions (H x W x D)  
22" x 13.5" x 7" (55.9 x 34.3 x 17.8 cm)  
Heater Dimensions (H x W x D)  
21.5" x 13.5" x 7" (54.6 x 34.3 x 17.8 cm)  
Carton Dimensions (H x W x D)  
25" x 16.75" x 7.75" (63.5 x 42.5 x 19.7 cm)  
Carton Dimensions (H x W x D)  
25" x 16.75" x 7.75" (63.5 x 42.5 x 19.7 cm)  
Heater Weight - 13.5 (6.1 kg)  
Heater Shipping Weight - 15 lb (6.8 kg)  
Heater Weight - 12.5 lb (5.7 kg)  
Heater Shipping Weight - 14 lb (6.4 kg)  
24  
117001-01A  
 
ACCESSORIES  
REPLACEMENT PARTS  
Purchase this heater accessory from your local Note: Use only original replacement parts. This  
dealer. If they can not supply this accessory, either will protect your warranty coverage for parts  
contact your nearest Parts Central (page 26) or replaced under warranty.  
call DESA Heating Products at 1-866-672-6040 for  
PARTS UNDER WARRANTY  
Contact authorized dealers of this product. If  
referralinformation.Youcanalsowritetotheaddress  
listed on the back page of this manual.  
they canʼt supply original replacement part(s),  
call DESA Heating Productsʼ Technical Service  
Department at 1-866-672-6040.  
When calling DESA Heating Products, have  
ready  
your name  
your address  
model and serial numbers of your heater  
how heater was malfunctioning  
type of gas used (propane/LP or natural gas)  
purchase date  
EQUIPMENT SHUTOFF VALVE  
GA5010  
For all models. Equipment shutoff valve with  
Usually, we will ask you to return the part to the  
factory.  
1/8" NPT tap.  
ELECTRONIC IGNITOR KIT - GA435  
Not Shown  
For all piezo ignitor models. Provides easier  
PARTS NOT UNDER WARRANTY  
Contact authorized dealers of this product. If they  
canʼt supply original replacement part(s), either  
contact your nearest Parts Central (see page 26)  
or call DESAHeating Products at 1-866-672-6040  
for referral information.  
lighting of the pilot.  
SERVICE HINTS  
When Gas Pressure Is Too Low  
When calling DESA Heating Products, have  
ready  
pilot will not stay lit  
model number of your heater  
the replacement part number  
burner will have delayed ignition  
heater will not produce specified heat  
propane/LP gas supply may be low  
Youmayfeelyourgaspressureistoolow. Ifso, con-  
tact your local natural or propane/LP gas supplier.  
TECHNICAL SERVICE  
You may have further questions about installation,  
operation or troubleshooting. If so, contact DESA  
Heating Productsʼ Technical Service Department  
at 1-866-672-6040. When calling please have your  
model and serial numbers of your heater ready.  
You can also visit DESAHeating Productsʼtechni-  
cal service web site at www.desatech.com.  
SERVICE PUBLICATIONS  
Youcanpurchaseaservicemanualfromtheaddress  
listed on the back page of this manual. Send a check  
for $5.00 payable to DESA Heating Products.  
117001-01A  
25  
 
PARTS CENTRAL  
These Parts Centrals are privately owned businesses. They have agreed to support our customerʼs needs  
by providing original replacement parts and accessories.  
Tool & Equipment Co.  
5 Manila Ave  
Washer Equipment Co.  
1715 Main Street  
Hamden, CT 06514-0322  
1-800-397-7553  
203-248-7553  
Kansas City, MO 64108-2195  
KS, MO, AR  
816-842-3911  
Portable Heater Parts  
342 N. County Rd. 400 East  
Valparaiso, IN 46383-9704  
219-462-7441  
East Coast Energy  
707 Broadway  
W. Long Branch, NJ 07764-1501  
732-870-8809  
1-800-755-8809  
1-888-619-7060  
21st Century  
FBD  
2950 Fretz Valley  
Perkasie, PA 18944-4034  
215-795-0400  
1349 Adams Street  
Bowling Green, KY 42103-3414  
270-846-1199  
800-325-4828  
1-800-654-8534  
Fax: 1-800-846-0090  
Laporte’s Parts & Service  
2444 N. 5th Street  
Hartsville, SC 29550-7704  
843-332-0191  
Parts Department  
Master Parts Dist.  
1251 Mound Ave. NW  
Grand Rapids, MI 49504-2672  
616-791-0505  
1-800-446-1446  
Cans Unlimited  
P.O. Box 645  
Taylor, SC 29687-0013  
803-879-3009  
1-800-845-5301  
26  
 
117001-01A  
NOTES  
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117001-01A  
27  
 
WARRANTY INFORMATION  
KEEP THIS WARRANTY  
Model  
Serial No.  
Date Purchased  
Always specify model and serial numbers when communicating with the factory.  
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our  
standard written warranty. We make no other warranty, expressed or implied.  
LIMITED WARRANTIES FOR NEW AND FACTORY  
RECONDITIONED PRODUCTS  
New Products: DESAHeating Products warrants this heater and any parts thereof, to be free of defects in materials  
and workmanship for two (2) years from the date of first purchase, when operated and maintained in accordance  
with the manufacturer's instructions. These warranties are extended only to the original retail purchaser, when  
proof of purchase is provided.  
Factory Reconditioned Heaters: DESAHeating Products warrants this factory reconditioned heater and any parts  
thereof, to be free of defects in materials and workmanship for thirty (30) days from the date of first purchase,  
when operated and maintained in accordance with the manufacturer's instructions. These warranties are extended  
only to the original retail purchaser, when proof of purchase is provided.  
This warranty is extended only to the original retail purchaser. This warranty covers only the cost of part(s) required  
to restore this heater to proper operating condition. Warranty part(s) MUST be obtained through authorized dealers  
of this product and/or DESA Heating Products who will provide original factory replacement parts. Failure to use  
original factory replacement parts voids this warranty. The heater MUST be installed by a qualified installer in  
accordance with all local codes and instructions furnished with the unit.  
This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts  
that fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by  
improper installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related to  
repairing a defective 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, INCLUD-  
ING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO  
(2) YEARS FROM THE DATE OF FIRST PURCHASE; AND DESA HEATING PRODUCTSʼ LIABILITY IS  
HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA HEATING PRODUCTS  
SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT, INCI-  
DENTAL 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:  
2701 Industrial Drive  
P.O. Box 90004  
Bowling Green, KY 42102-9004  
Patent Pending  
117001-01  
Rev. A  
117001 01  
05/05  
NOT A UPC  
 

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