Desa BLP375AT User manual

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Save this manual for future reference.
For more information, visit www.desatech.com
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PROPANE/LP CONSTRUCTION
FORCED AIR HEATER
OWNER’S MANUAL
MODELS
BLP375AT
SBLP375AT
225,000 - 375,000 Btu/HrWith
Built-InThermostat AT Series
GENERAL HAZARD WARNING:
FAILURETO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONSPROVIDED WITH THIS
HEATER, CAN RESULT IN DEATH, SERIOUS BODILY INJURY AND PROPERTY LOSS OR
DAMAGEFROM HAZARDSOF FIRE, EXPLOSION,BURN, ASPHYXIATION,CARBON MONOX-
IDE POISONING, AND/OR ELECTRICAL SHOCK.
ONLYPERSONS WHO CAN UNDERSTAND AND FOLLOW THEINSTRUCTIONS SHOULD USE
OR SERVICE THIS HEATER.
IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS AN INSTRUCTIONS
MANUAL, LABELS, ETC. CONTACT THE MANUFACTURER.
IMPORTANT: Read and understand this manual before assembling, starting, or servicing
heater.Improperuseofheatercancauseseriousinjury.Keepthismanualforfuturereference.
TABLE OF CONTENTS
SAFETY INFORMATION ............................................................ 2
PRODUCT IDENTIFICATION ..................................................... 3
UNPACKING ............................................................................... 3
THEORY OF OPERATION ......................................................... 3
PROPANE/LP SUPPLY .............................................................. 4
VENTILATION............................................................................. 4
INSTALLATION ........................................................................... 4
OPERATION ............................................................................... 5
STORAGE................................................................................... 5
MAINTENANCE .......................................................................... 6
SERVICE PROCEDURE ............................................................ 6
SPECIFICATIONS ...................................................................... 7
ACCESSORIES .......................................................................... 7
TECHNICAL SERVICE ............................................................... 7
SERVICE PUBLICATIONS ......................................................... 7
ILLUSTRATED PARTS BREAKDOWNAND PARTS LIST ......... 8
WIRING DIAGRAMS................................................................. 10
REPLACEMENT PARTS .......................................................... 10
OWNER’S REGISTRATION ......................................................11
WARRANTY INFORMATION...................................... Back Cover

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The heater is designed and approved for use as a construction heater
under ANSI Z83.7•CGA Z.14-2000 Construction Heater. The pur-
pose of construction heaters is to provide temporary heating of
buildings under construction, alteration or repair. Properly used, the
heaterprovidessafe economicalheating. Productsofcombustion are
vented into the area being heated.
We cannot foresee every use which may be made of our heaters.
Checkwithyourlocalfiresafetyauthorityifyouhavequestions
about heater use.
Other standards govern the use of fuel gases and heat producing
products for specific uses. Your local authorities can advise you
about these.
Carbon Monoxide Poisoning: Some people are more affected by
carbon monoxide than others. Early signs of carbon monoxide
poisoning resemble the flu, with headaches, dizziness, and/or nau-
sea.Ifyouhavethesesigns,theheatermaynotbeworkingproperly.
Get fresh air at once! Have heater serviced.
Propane/LPGas:Propane/LPgasisodorless.Anodor-makingagent
is added to propane/LP gas. The odor helps you detect a propane/LP
gas leak. However, the odor added to propane/LP gas can fade.
Propane/LP gas may be present even though no odor exists.
Make certain you read and understand all warnings. Keep this manual
forreference.Itisyourguidetosafeandproperoperationofthisheater.
• Install and use heater with care. Follow all local ordinances
and codes. In the absence of local ordinances and codes, refer
to the Standard for Storage and Handling of Liquefied Petro-
leum Gas, ANSI/NFPA 58 and the Propane Installation Code,
CAN/CGA B149.2. This instructs on the safe storage and han-
dling of propane gases.
WARNING: NOT FOR HOME OR RECREATIONAL
VEHICLE USE.
SAFETY INFORMATION
WARNING: FIRE, BURN, INHALATION, AND EX-
PLOSION HAZARD. KEEP SOLID COMBUSTIBLES,
SUCHASBUILDING MATERIALS, PAPER ORCARD-
BOARD, A SAFE DISTANCE AWAY FROM THE
HEATER AS RECOMMENDED BY THE INSTRUC-
TIONS.NEVERUSETHEHEATERINSPACESWHICH
DO OR MAY CONTAIN VOLATILE OR AIRBORNE
COMBUSTIBLES, OR PRODUCTS SUCH AS GASO-
LINE,SOLVENTS,PAINTTHINNER,DUSTPARTICLES
OR UNKNOWN CHEMICALS.
WARNINGS • Use only the electrical voltage and frequency specified on
model plate. The electrical connections and grounding of the
heater shall follow the National Electric Code,ANSI/NFPA 70
or the Canadian Electric Code, Part 1.
• Electricalgrounding instructions —This appliance is equipped
withathree-prong (grounding) plug for your protectionagainst
shock hazard and should be plugged directly into a properly
grounded three-prong receptacle or extension cord.
• This product has been approved for use in the Commonwealth
of Massachusetts.
• For indoor use only. Provide adequate ventilation.
• Keep heater away from strong drafts, wind, water spray, rain,
or dripping water.
• Use only in well-vented areas. Before using heater, provide at
least a three-square-foot opening of fresh, outside air for each
100,000 Btu/Hr of rating.
• Do not use heater outdoors or in occupied dwellings.
• Do not use heater in living or sleeping quarters.
• Keep appliance area clear and free from combustible materi-
als, gasoline, paint thinner, and other flammable vapors and
liquids. Dust is combustible. Do not use heater in areas with
high dust content.
• This heater is equipped with a thermostat. Heater may start at
anytime.
• Check heater for damage before each use. Do not use a dam-
aged heater.
• Use only propane/LP gas set up for vapor withdrawal.
• Keep propane tank(s) below 100° F.
• Do not use heater in a basement or below ground level. Pro-
pane/LP gas is heavier than air. If a leak occurs, propane/LP
gas will sink to the lowest possible level.
• Useonly thehose and factoryregulator providedwith the heater.
• Check hose before each use of heater. If highly worn or cut,
replacewith hosespecified by manufacturerbefore using heater.
• Do not alter heater. Keep heater in its original state.
• Do not use heater if altered.
• Keep heater at least six feet from propane/LP tank(s). Do not
point heater at propane/LP tank(s) within 20 feet.
• Minimum heater clearances from combustibles:
Outlet: 8 Ft. Sides: 2 Ft. Top: 6 Ft. Rear: 2 Ft.
• Locate heater on stable and level surface if heater is hot or
running.
• Keep children and animals away from heater.
• Turn off propane/LPsupply and unplug heater when not in use.
• Never block air inlet (rear) or air outlet (front) of heater.
• Never move, handle, or service a hot, operating, or plugged-in
heater.
SAFETY INFORMATION
WARNING:Thisproductcontainsand/orgenerates
chemicals known to the State of California to cause
cancer or birth defects, or other reproductive harm.

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SAFETY INFORMATION
PRODUCT IDENTIFICATION
UNPACKING
THEORY OF OPERATION
SAFETY INFORMATION
Continued
PRODUCT IDENTIFICATION
Figure 1 - 375,000 Btu/Hr Models
REAR VIEW Thermostat Knob
Power
Cord
Inlet Connector
On/Off Switch
Handle
Outer Shell
Hose/Regulator
Assembly
Hot Air Outlet (Front)
Fan
Guard
UNPACKING
1. Remove all packing items applied to heater for shipment. Keep
plastic cover caps (attached to inlet connector and hose/regu-
lator assembly) for storage.
2. Remove all items from carton.
3. Check all items for shipping damage. If heater is damaged,
promptly inform dealer where you bought heater.
• Never attach duct work to front or rear of heater.
• Use only original replacement parts. This heater must use de-
sign-specific parts. Do not substitute or use generic parts. Im-
proper replacement parts could cause serious or fatal injuries.
• Do not adjust regulator below 7 psig or above 20 psig.
Air For Combustion Air For Heating
THEORY OF OPERATION
The Fuel System: The hose/regulator assembly attaches to the
propane gas supply. The propane gas moves through the solenoid
valve and out the nozzle.
TheAirSystem:Themotorturnsthefan.Thefanpushesairintoand
around the combustion chamber. This air is heated and provides a
stream of clean, hot air.
The Ignition System: The direct spark ignitor (DSI) sends voltage
to the ignitor. The ignitor ignites the fuel and air mixture.
The Safety Control System:This system causes the heater to shut
down if the flame goes out. The motor will continue to run, but no
heat is produced.
Cool Air
In (Back)
Motor
Nozzle
Power
Cord
Hose/
Regulator
Assembly
Solenoid
Valve
Ignitor
Combustion
Chamber
DSI
Figure 2 - Cross Section Operational View
Fan
Clean
Heated
Air Out
(Front)

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PROPANE/LP SUPPLY
VENTILATION
INSTALLATION
PROPANE/LP SUPPLY
Propane/LPgasandpropane/LPtank(s)aretobefurnishedbytheuser.
Use this heater only with a propane/LP vapor withdrawal supply
system. See Chapter 5 of the Standard for Storage and Handling of
Liquefied Petroleum Gas, ANSI/NFPA 58 and the Propane Instal-
lation Code CAN/CGA B149.2. Your local library or fire depart-
ment will have these booklets.
Theamountofpropane/LPgasreadyforusefrompropane/LPtanks
varies. Two factors decide this amount:
1. The amount of propane/LP gas in the tank(s)
2. The temperature of tank(s)
The chart below shows the number of 100-pound tanks needed to
run this heater.
Do not operate this product with any tank smaller than 100 pounds.
Temperature (°F) Number
At Tank of tanks
40°3
32°(Use
20°larger
0°tank
-10°below
-20°40°F)
Lessgas is vaporized at lowertemperatures.You may need a larger
tank in colder weather. Your local propane/LP gas dealer will help
you select the proper supply system. The minimum surrounding air
temperature rating for each heater is -20°F.
VENTILATION
Provide at least three square feet of fresh, outside air for each
100,000Btu/Hrof rating.This heaterrequiresa freshairopening of
at least 11.25 square feet. Provide extra fresh air if more heaters are
being used.
WARNING:Followtheminimumfresh,outsideair
ventilation requirements. If proper fresh, outside air
ventilationisnotprovided,carbonmonoxidepoison-
ing can occur. Provide proper fresh, outside air ven-
tilation before running heater.
INSTALLATION
1. Provide propane/LP supply system (see Propane/LP Supply).
2. Connect POL fitting on hose/regulator assembly to propane/LP
tank(s).TurnPOLfitting counterclockwiseinto threads ontank.
Tighten firmly using a wrench. IMPORTANT: Tighten regula-
tor with black adjustment knob pointing down. Pointing adjust-
ment knob down protects regulator from weather damage.
3. Connect hose toinlet connector.Tightenfirmly usingawrench.
IMPORTANT: Extra hose or piping may be used if needed.
Install extra hose or piping between hose/regulator assembly
and propane/LPtank.You must use the regulator supplied with
the heater.
4. Open propane/LP supply valve on propane/LP tank(s) slowly.
Note: If not opened slowly, excess-flow check valve on pro-
pane/LPtank will stop gas flow. If this happens, you may hear a
clickinsidethe regulatorassembly.Toreset theexcessflow check
valve, close propane/LP supply valve and open again slowly.
WARNING: Review and understand the warnings
in the Safety Information section, page 2. They are
needed to safely operate this heater. Follow all local
codes when using this heater.
WARNING: Test all gas piping and connections
for leaks after installing or servicing. Never use an
open flame to check for a leak. Apply a mixture of
liquid soap and water to all joints. Bubbles forming
show a leak. Correct all leaks at once.
Propane/LP
Tank
Supply Valve
Hose
POL Fitting
Regulator
Adjustment Knob
(pointing down)
Figure 3 - Regulator With Adjustment Knob Pointing Down
Figure 4 - Hose and Inlet Connector
Hose
Inlet Connector

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INSTALLATION
OPERATION
STORAGE
WARNING: Do not adjust regulator below 7 psig or
above 20 psig. Heater may not run properly.
INSTALLATION
Continued
Figure 5 - Adjustable Regulator Set At 7 psig
I
N
C
R
E
A
S
E
10
15
20
10
15
20
5
5
5
10
15
20
Regulator
OPERATION
TO START HEATER
1. Follow all installation, ventilation and safety information.
2. Locate heater on stable and level surface. Make sure strong
drafts do not blow into front or rear of heater.
3. Plug power cord of heater into a three-prong, grounded exten-
sion cord. Extension cord must be at least six feet long. Exten-
sion cord must be UL listed.
Extension Cord Size Requirement
Up to 50 feet long, use 18 AWG rated cord.
51 to 100 feet long, use 16 AWG rated cord.
101 to 200 feet long, use 14 AWG rated cord.
4. Plug extension cord into a 120 volt/60 hertz, three-hole,
grounded outlet.
5. Open propane/LP supply valve on propane/LP tank(s) slowly.
Note: If not opened slowly, excess-flow check valve on pro-
pane/LPtank will stop gas flow. If this happens, you may hear a
clickinsidethe regulatorassembly.Toreset theexcessflow check
valve, close propane/LP supply valve and open again slowly.
WARNING: Review and understand the warnings
in the Safety Information section, page 2. They are
needed to safely operate this heater. Follow all local
codes when using this heater.
WARNING: Do not adjust regulator below 7 psig or
above 20 psig. Heater may not run properly.
6. Make sure regulator is set between 7 and 20 psig.
Note: Higher
regulator setting will allow heater to produce more heat.
5. Adjust regulator between 7 and 20 psig (see Figure 5). Note:
Higherregulator setting will allow heaterto produce more heat.
6. Check all connections for leaks.
7. Close propane/LP supply valve.
7. Turn on/off switch to the ON position. Adjust thermostat to de-
sired setting. If heater does not start, thermostat setting may be
too low. Turn thermostat knob to higher position to start heater.
Note: If heater does not start, turn on/off switch to the OFF posi-
tion. Wait ten seconds for safety control to reset, then try again.
TO STOP HEATER
1. Tightly close propane/LP supply valve on propane tank(s).
2. Wait a few seconds. Heater will burn gas left in supply hoses.
3. Turn on/off switch to the OFF position.
4. Unplug heater.
TO RESTART HEATER
Ifsafetycontrolstopsgas flowtoheater,motor willcontinuetorun.
To restart heater:
1. Turn on/off switch to the OFF position.
2. Wait ten seconds, then turn on/off switch to the ON position.
If heater does not restart
• Check manual valves (if any) and supply valves (on propane/LP
tank). Make sure they are open.
• Check fuel level in propane/LP tank(s). If fuel level is too low,
contact local propane/LP gas company.
If heater still does not restart, contact your local service center.
CAUTION: Disconnect heater from propane/LP
supply tank(s).
STORAGE
1. Store propane/LPtank(s) in safe manner. See chapter 5 of Stan-
dard for Storage and Handling of Liquefied Petroleum Gases,
ANSI/NFPA 58 and the Propane Installation Code CAN/CGA
B149.2. Follow all local codes.
2. Place plastic cover caps over brass fittings on inlet connector
and hose/regulator assembly.
3. Store in dry, clean, and safe place. Do not store hose/regulator
assembly inside heater combustion chamber.
4. When taking heater out of storage, always check inside of
heater. Insects and small animals may place foreign objects in
heater. Keep inside of heater free from combustible and for-
eign objects.

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MAINTENANCE
SERVICE PROCEDURE
1. Keep heater clean. Clean heater annually or as needed to re-
move dust and debris. If heater is dirty or dusty, clean heater
with a damp cloth.
2. Inspect heater before each use. Check connections for leaks.
Applymixture of liquid soapand water to connections.Bubbles
forming show a leak. Correct all leaks at once.
3. Inspect hose/regulator assembly before each use. If hose is
highly worn or cut, replace.
4. Have heater inspected yearly by a qualified service agency.
5. Keep inside of heater free from combustible and foreign objects.
WARNING:Neverserviceheaterwhileitisplugged
in, connected to propane supply, operating, or hot.
Severe burns and electrical shock can occur.
MAINTENANCE
SERVICE PROCEDURE
CLEANING FAN
Clean fan every 500 hours of operation or as needed.
1. Remove screws on side cover using 5/16" nut-driver.
2. Remove side cover.
3. Detach the five motor wires from parts under heater shell. Be
sure to detach only wires coming from motor.
The five motor wires are:
• white wire—to terminal board
• black wire—to terminal board
• blue wire—to thermal switch wire
• orange wire—to solenoid valve
• green wire—to grounding screw on shell
4. Remove fan guard from rear of heater.
5. Reach into rear of heater shell. Carefully pull motor wires
through hole in bottom of shell. Note: Pull wires through hole
one at a time.
6. Remove nuts andmounting bolts holding motor mount toshell.
Use 3/8" nut-driver and 7/16" wrench.
7. Carefully pull motor and fan out of shell. IMPORTANT: Be
careful not to damage fan. Do not set motor and fan down with
the weight resting on fan. This could damage fan pitch.
8. Turn motor and fan around. Place motor and fan into shell
backwards. Note: Motor will go into shell first (see Figure 8).
9. Line up rear mounting holes in shell with first hole on each
side of motor mount (see Figure 8). Note: When holes are
lined up, fan should be outside of shell.
WARNING:Neverserviceheaterwhileitisplugged
in, connected to propane supply, operating, or hot.
Severe burns and electrical shock can occur.
Figure 7 - Location of Fan and Motor
Motor Wires
Mounting
Bolts
Motor Mount
Terminal
Board
Figure 6 - Location of Motor Wires
Grounding Screw
Thermal
Switch Wire
Solenoid
Valve
Figure 8 - Fan and Motor Turned Around
Rear
Mounting
Hole
First
Hole

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SERVICE PROCEDURE
SPECIFICATIONS
ACCESSORIES
TECHNICAL SERVICE
SERVICE PUBLICATIONS
10. Holding mounting bolt, carefully reach through fan blades into
rear of heater. Be careful not to damage fan pitch. Insert bolt
through motor mount and shell.With free hand, attach nut fin-
ger tight. Repeat process for other mounting hole.
11. Use 1/8" hex wrench to loosen setscrew which holds fan to
motor shaft (see Figure 9).
12. Slip fan off motor shaft.
13. Clean fan using soft cloth moistened with kerosene or solvent.
14. Dry fan thoroughly.
15. Replace fan on motor shaft. Make sure setscrew is touching
back of flat surface on motor shaft (see Figure 10).
16. Place setscrew on flat of shaft. Tighten setscrew firmly (40-50
inch-pounds).
17. Remove two nuts and bolts securing motor mount to shell.
18. Pull motor and fan from shell. Turn motor and fan around.
Carefully place back in shell.
Note: Fan will go into shell first.
19. Line up mounting holes in shell with holes on motor mount.
Replace four bolts through shell and motor mount. Insert bolts
from outside of heater. Tighten nuts firmly.
20. Route motor wires through hole in bottom of shell (see Figure 7,
page 6).
21. Connect motor wires as follows (see Figure 6, page 6):
• white wire—to terminal board.
Note: Attach to empty connector on white wire side of ter-
minal board.
• black wire—to terminal board.
Note: Attach to empty connector on black wire side of ter-
minal board.
• blue wire—to thermal switch wire
• orange wire—to solenoid valve
• green wire—to grounding screw on shell
22. Replace side cover.
23. Replace fan guard.
SERVICE PROCEDURE
Continued
Fan
Setscrew
Motor shaft
Figure9-Fan,MotorShaft,and
Setscrew Location
Motor
Shaft
Setscrew
Hub
Fan
Figure 10 - Fan Cross
Section
SPECIFICATIONS
Output Rating (Btu/Hr)...................... 225,000 to 375,000
Fuel .................................................... Propane/LP Vapor Only
Fuel Consumption
Gallons/Hour.................................. 2.5 Min/4.0 Max
Pounds/Hour .................................. 10.4 Min/17.4 Max
Supply Pressure To Regulator
Minimum (for input adjustment) ... 25 psig
Maximum....................................... Tank Pressure
Regulator Outlet Pressure.................. 7-20 psig
Hot Air Output (CFM)...................... 1500
Motor ................................................. 1725 RPM, 1/5 HP
Electric Input ..................................... 120 V/60 Hz
Amperage .......................................... 4.2
Ignition .............................................. ElectronicDirectSpark,D.S.I.
Weight (Pounds)
Heater............................................. 52
Shipping ......................................... 57
Size - L x W x H (Inches)
Carton............................................. 37 x 15.25 x 20.75
Heater............................................. 35 x 13 x 19.5
ACCESSORIES
Purchase accessories and parts from your nearest dealer or service
center. If your dealer or service center can not supply an accessory
or part, either contact your nearest Parts Central (listed in the
separate Authorized Service Center booklet) or call DESA Heating
Products at 1-866-672-6040 for referral information. You can also
write to the address listed on the back page of this manual.
Fuel Gas Connector: LPA4020
A POL adapter with excess-flow check valve.
Thermostat: HA1210
TECHNICAL SERVICE
Youmayhavefurtherquestionsaboutthisheater.Ifso,contactDESA
HeatingProducts’TechnicalServiceDepartmentat1-866-672-6040
or visit our website at www.desatech.com. When contacting
DESA Heating Products, please have your model and serial num-
bers of your heater ready.
SERVICE PUBLICATIONS
You can receive an Illustrated Parts List free of charge. Send your
request and a self-addressed, stamped envelope to DESA Heating
Products(addressonbackpage).Besuretoincludetheheatermodel
number. You can purchase a service manual for $5. Make check
payable to DESA Heating Products.

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ILLUSTRATED PARTS BREAKDOWN
Models BLP375AT and SBLP375AT
ILLUSTRATED PARTS
BREAKDOWN
MODELS
BLP375AT
SBLP375AT
Note: Screws are standard hardware items
2
21
1
4
27
18
3
8
9
10
11
22
17
23
29
16
15
20 7
14
12
13
65
19
32
30
26
31
25
34
33
24

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PARTS LIST
Models BLP375AT and SBLP375AT
PARTS LIST
MODELS
BLP375AT
SBLP375AT
This list contains replaceable parts used in your heater. When ordering parts, follow the
instructions listed under Replacement Parts on page 10 of this manual.
* No Longer Available
** Not a field replacement part.
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 097844-02 Outer Shell Assembly (BLP375AT) 1
097844-04 Outer Shell Assembly (SBLP375AT) 1
2 ** Combustion Chamber Assembly 1
3 ** Burner Assembly 1
4 097805-01 Ignitor 1
5 097918-01 Cleat 2
6 097917-01 Handle 1
7 097806-02 Ignitor Cable 1
8 097811-01 Fan 1
9 097802-01 Motor 1
10 M50104-02 Shorty Bushing 1
11 097838-02 Fan Guard 1
12 M11143-1 Strain Relief Bushing 1
13 098219-17 Cord Assembly 1
14 097809-01 Male Fitting 1
15 097828-01 Solenoid Bracket 1
16 098201-01 Solenoid Valve 1
17 100145-01 Fuel Tube 1
18 099679-01 Nozzle 1
19 097833-04 Side Cover 1
20 097833-03 Side Cover 1
21 101732-03 Thermal Switch Kit 1
22 097829-02 Motor Mount 1
23 098226-01 On/Off Switch 1
24 * Indicator Plate 1
25 099125-01 Terminal Board 1
26 100408-03 Base 1
27 097848-01 Rear Plate Assembly 1
28 100146-01 Elbow Fitting 1
29 098827-01 Compression Fitting 1
30 M10908-1 Screw, Hex TPG "F" 6-32x.25 2
31 097657-03 Thermostat 1
32 104905-01 Thermostat Knob 1
33 110267-01 DSI Wire Harness (2003-45 Only) 1
34 110287-01 DSI Control No. 2003-45 1
PARTS AVAILABLE - NOT SHOWN
M9900-170 Wire Assembly (2003-45 Only) 1
079010-36 Wire Assembly (2003-45 Only) 1
102971-02 Wiring Decal (2003-45 Only) 1
102971-01 Wiring Decal (2003-19 Only) 1
103021-01 Thermostat Decal 1
LPA3030 Regulator & Hose Assembly 1
103019-04 General Information Decal 1
097650-01 Tradename Decal 2
097916-01 Baffle 1
111632-13 Model Data Decal 1
LPA2020 Regulator 1

103018-01H
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PARTS UNDER WARRANTY
Contact authorized dealers of this product. If they cannot supply
original replacement part(s), either contact your nearest Parts
Central or call DESA Heating Products’ Technical Service De-
partment at 1-866-672-6040. When calling DESA Heating Prod-
ucts, have ready:
• your name
• your address
WARNING: Use only original replacement parts.
This heater must use design-specific parts. Do not
substitute or use generic parts. Improper replace-
ment parts could cause serious or fatal injuries. This
will also protect your warranty coverage for parts
replaced under warranty.
REPLACEMENT PARTS
WIRING DIAGRAMS
REPLACEMENT PARTS
WIRING DIAGRAMS
Green
Green
Solenoid
Valve Motor
On/Off
Switch
Green
Power
Cord
T
Blue
Blue
Black
White
DSI
Control
Orange
Ignitor
Thermal
Switch
Orange
Terminal
Board
White White
Black Black
Blue
Connector
Blue
Connector
Connector
Blue
Black
T
Figure 12 - Electrical Ladder Diagram
Green
Black White
Thermal Switch
Blue
Motor
Line Ground Neutral
White
White
Orange
Orange
Green
Black
Connector
Blue
Blue
Ignitor
Solenoid
Valve
Direct Spark
Ignitor
Centrifugal
Switch
Green
Green
Black
TT
Figure 11 - Wiring Diagram
• model and serial numbers of your heater
• how heater was malfunctioning
• purchase date
In most cases, we will ask you to return the part to the factory.
PARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If they cannot supply
original replacement part(s), either contact your nearest Parts Cen-
tral or call DESA Heating Products at 1-866-672-6040 for referral
information. When calling DESA Heating Products, have ready:
• model number of your heater
• the replacement part number

103018-01H
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For more information, visit www.desatech.com
1. Who will heater be used by? ❍ Individual ❍ Business
2. Will you use your heater in more than one location? ❍ Yes ❍ No
3. Where will the product be used? (You may select more than one.) ❍ Workshop ❍ Barn ❍ Residential Construction
❍ Commercial Construction ❍ Garage ❍ Factory ❍ Recreation ❍ Warehouse ❍ Utility Shed/Outbuilding
❍ Other ______________________________ (Specify)
4. Cost of product (excluding sales tax)? $________________________________
5. Maintenance/service work will be performed by: ❍ Self ❍ Service Center ❍ Other ___________________________________
6. If you bought this product yourself, did you plan to purchase this type of product before going into the store? ❍ Yes ❍ No
7. Type of store where product was purchased? ❍ Hardware ❍ Propane Dealer ❍ Natural Gas/Utility Co. ❍ Home Center or Builder’s Supply
❍ Farm/Ag. Supply ❍ Auto Parts ❍ Warehouse Club ❍ Industrial/Contractor Supply ❍ Rental Store
❍ Discount Store ❍ HVAC Dealer ❍ Other _________________________________________________
8. What is your primary source of heat? ❍ Propane (LP Gas) ❍ Natural Gas ❍ Kerosene ❍ Diesel ❍ Electric ❍ Other________________
9. What motivated you to buy this product? ❍ Sudden Cold Weather ❍ Replace Older Model ❍ D.I.Y. Home Project ❍ Emergency Back-Up Heat
❍ Heater on Sale ❍ Construction Project ❍ Hard to Heat Location ❍ Other ________________________________
10. How did you learn about this product brand? ❍ Advertisement ❍ Relative or Friend ❍ Co-Worker ❍ Store Representative
❍ Store Display ❍ Previously Owned a Heater ❍ Other _________________________________________________(Specify)
11. What other brands did you consider? ❍ None ❍ Master ❍ Remington ❍ All-Pro ❍ Dayton ❍ Universal ❍ Mr. Heater ❍ L.B.White Tradesman
❍ John Deere ❍ Dyna-Glo ❍ Dura-Heat ❍ Paulin ❍ Coleman ❍ Vogelzang American ❍ Other ___________________________________
12. Who selected the product? ❍Male ❍Female ❍Both
13. Level of Education of Purchaser: ❍ High School ❍ Vocation/Technical School ❍ Some College ❍ Completed College ❍ Graduate School
14. Age of Purchaser: ❍ Under 20 ❍ 20 - 29 ❍ 30 - 39 ❍ 40 - 49 ❍ 50 - 59 ❍ 60 or Over
15. Buyer’s total annual household income: ❍ Under $19,999 ❍ $20,000 to $34,999 ❍ $35,000 to $49,999
❍ $50,000 to $74,999 ❍ $75,000 to $99,999 ❍ $100,000 and Over
16. What is the population of your area? ❍ Under 10,000 ❍ 10,000 to 25,000 ❍25,000 to 50,000 ❍ 50,000 to 100,000
❍ 100,000 to 250,000 ❍ Over 250,000
17. Store where product was purchased:
Name: ______________________________________ City: _____________________________________ State: __________
18. In choosing this product, how important were the following:
Availability
Price
Brand Name
Overall Quality
Heat Output (Btu/Hr Rating)
Variable Heat Output (Btu/Hr)
Made in USA
Warranty
Local Service
Value for Price
19. This question will allow us to better understand the demographic profile of our customers.Which of the following best describes you? (not required)
❍ African American ❍ Asian American ❍ Mexican ❍ Puerto Rican ❍ Cuban ❍ Other Hispanic ❍ White ❍ Other ___________________
Brand: (Reddy Heater, Master, Remington, etc.)
Model: (R60, HD15, etc.)
Date Purchased: Note: Keep receipt for warranty verification.
Serial Number: 7 or 9 digit number located on product or identification tag.
First Name: Last Name:
Address:
City: State: Zip: Country:
Phone: ( ) - E-Mail:
OWNER'S REGISTRATION FORM
Please answer the following questions to register your product with DESA Heating Products:
Complete registration form and mail or complete on-line registration at www.desatech.com within 30 days after purchase.
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Size
Prior Brand Experience
Built-In Thermostat
Ease of Operation
Special Features
Salesperson’s Recommendation
Friend/Relative’s Recommendation
Portability
Quiet Operation

2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
Postage
Required
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WARNING
PROPANE/LP FORCED AIR HEATERS
PROPANE/LP TANK TOP HEATERS
PROPANE/LP AND NATURAL
GAS GARAGE HEATERS
PROPANE/LP CONVECTION HEATERS
PORTABLE KEROSENE/DIESEL
FORCED AIR HEATERS
PROPANE/LP
PATIO HEATERS PROPANE/LP AND NATURAL GAS CHIMENEAS
OTHER OUTDOOR HEATING PRODUCTS

103018-01H
14
For more information, visit www.desatech.com
For more information, visit www.desatech.com
DESA Heating Products warrants this product and any parts thereof, to be free from defects in materials and workmanship for one (1) year from
the date of first purchase when operated and maintained in accordance with instructions. This warranty is extended only to the original retail
purchaser, when proof of purchase is provided.
Thiswarrantycoversonlythecostofpartsandlaborrequiredtorestoretheproducttoproperoperatingcondition.Transportationandincidentalcosts
associated with warranty repairs are not reimbursable under this warranty.
Warranty service is available only through authorized dealers and service centers.
This warranty does not cover defects resulting from misuse, abuse, negligence, accidents, lack of proper maintenance, normal wear, alteration,
modification, tampering, contaminated fuels, repair using improper parts, or repair by anyone other than an authorized dealer or service center.
Routine maintenance is the responsibility of the owner.
ThisExpressWarranty IsGivenInLieuOfAnyOtherWarrantyEither ExpressedOrImplied,IncludingWarrantiesOfMerchantabilityAndFitness
For A Particular Purpose.
DESA Heating Products assumes no responsibility for indirect, incidental or consequential damages. Some states do not allow the exclusion or
limitationofincidentalorconsequentialdamages,orlimitationsorexclusionsmaynotapplyto you. This Limited Warranty gives you specific legal
rights and you may also have other rights which vary from state to state.
WARRANTY AND REPAIR SERVICE
LIMITED WARRANTY
KEEP THIS WARRANTY
103018-01
Rev. H
08/03
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
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.
WARRANTY SERVICE
Shouldyour heater require service, return it toyournearest authorized service center. Proof of purchasemustbe presented with the heater. The heater will
be inspected. A defect may be caused by faulty materials or workmanship. If so, DESA Heating Products will repair or replace the heater without charge.
REPAIR SERVICE
Return your heater to your nearest authorized service center. Repairs not covered by the warranty will be billed at standard prices. Each Service Center
is independently owned and operated. We reserve the right to amend these specifications at any time without notice.
When writing, always include model number and serial number. For information, write:
NOT A UPC
103018 01
Model
Serial No.
Date of Purchase