Desa ROPANE CONSTRUCTION HEATER User manual

Variable
30,000, 40,000,
50,000 Btu/Hr
IMPORTANT: Read and understand this manual before assembling, starting or servicing
heater.Improperuseofheatercancauseseriousinjury.Keepthismanualforfuturereference.
PROPANE CONSTRUCTION
HEATER
OWNER’S MANUAL
Save this manual for future reference.
Save this manual for future reference.
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TM
GENERAL HAZARD WARNING:
FAILURETO COMPLYWITH THEPRECAUTIONS ANDINSTRUCTIONS PROVIDEDWITH THIS
HEATER, CAN RESULT IN DEATH, SERIOUS BODILY INJURY AND PROPERTY LOSS OR
DAMAGEFROMHAZARDS OFFIRE,EXPLOSION, BURN,ASPHYXIATION,CARBON MONOX-
IDE POISONING, AND/OR ELECTRICAL SHOCK.
ONLYPERSONS WHOCAN UNDERSTANDAND FOLLOWTHE INSTRUCTIONSSHOULD USE
OR SERVICE THIS HEATER.
IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS AN INSTRUCTIONS
MANUAL, LABELS, ETC. CONTACT THE MANUFACTURER.
TABLE OF CONTENTS
SAFETY INFORMATION ............................................................ 2
PRODUCT IDENTIFICATION ..................................................... 3
UNPACKING ............................................................................... 3
PROPANE SUPPLY.................................................................... 3
THEORY OF OPERATION ......................................................... 4
ASSEMBLY ................................................................................. 4
INSTALLATION ........................................................................... 4
VENTILATION............................................................................. 5
OPERATION ............................................................................... 5
STORAGE................................................................................... 6
MAINTENANCE .......................................................................... 6
TROUBLESHOOTING ................................................................ 7
SERVICE PROCEDURES .......................................................... 8
ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 10
SPECIFICATIONS .................................................................... 12
ACCESSORIES ........................................................................ 12
REPLACEMENT PARTS .......................................................... 12
OWNER’S REGISTRATION FORM.......................................... 13
WARRANTYAND REPAIR SERVICE ........................Back Cover

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SAFETY INFORMATION
WARNING: FIRE, BURN, INHALATION, AND EX-
PLOSION HAZARD. KEEP SOLID COMBUSTIBLES,
SUCHAS BUILDING MATERIALS, PAPER OR CARD-
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.
WARNING:NOT FOR HOME ORRECREATIONAL
VEHICLE USE.
The heater is designed for use as a construction heater in accordance
with ANSI Z83.7/CGA 2.14. Other standards govern the use of fuel
gases and heating products for specific uses. Your local authority can
adviseyou about these.The primarypurposeof constructionheatersis
toprovidetemporaryheatingofbuildingsunderconstruction,alteration
or repair. Properly used, the heater provides safe economical heating.
Products of combustion are vented into the area being heated.
We cannot foresee every use which may be made of our heaters.
CHECKWITHYOURLOCALFIRESAFETYAUTHORITY
IF YOU HAVE QUESTIONS ABOUT HEATER USE.
Otherstandardsgoverntheuseoffuelgasesandheatproducingproducts
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.
Getfreshairatonce!Check forproperventilationandhave heater
serviced.
WARNINGS
Propane Gas: Propane gas is odorless. An odor-making agent is
addedto propanegas. Theodorhelpsyoudetectapropane gasleak.
However,theodoraddedtopropanegasmayfade.Propanegasmay
be present even though no odor exists.
Make certain you read and understand all warnings. Keep this
manual for reference. It is your guide to safe and proper operation
of this heater.
• Installanduseheaterwithcare.Followalllocalordinancesandcodes.
Intheabsenceoflocalordinancesandcodes,refertotheStandard for
Storage and Handling of Liquefied Petroleum Gas, ANSI/NFPA 58
and the Natural Gas Installation Code, CAN/CGA B149.2. This in-
structs on the safe storage and handling of propane gases.
• Use only the electrical voltage and frequency specified on
model plate.
• The electrical connections and grounding of the heater shall fol-
low the National Electric Code, ANSI/NFPA 70, or Canadian
Electrical Code, part 1.
• Electrical grounding instructions — This appliance is equipped
with a three-prong (grounding) plug for your protection against
shock hazard and should be plugged directly into a properly
grounded three-prong receptacle.
• Use only a three-prong, grounded extension cord.
• Use only the hose and factory preset regulator provided with
the heater.
• Use only propane gas set up for vapor withdrawal.
• Provideadequateventilation. Before using heater, provide atleast
a 1.5-square-foot opening of fresh, outside air.
• This product has been approved for use in the Commonwealth
of Massachusetts.
• For indoor use only. Do not use heater outdoors.
• Do not use heater in occupied dwellings or in living or sleep-
ing quarters.
• Do not use heater below ground level. Propane gas is heavier
than air. If a leak occurs, propane gas may sink to the lowest
possible level.
• Keep appliance area clear and free from combustible materials,
gasoline, paint thinner, and other flammable vapors and liquids.
Do not use heater in areas with high dust content.
• Minimum heater clearances from combustibles:
Outlet: 6 Ft. Sides: 2 Ft. Top: 6 Ft. Rear: 2 Ft.
• Keep heater at least six feet from propane tank(s). Do not point
heater at propane tank(s) within 20 feet.
• Keep propane tank(s) below 100° F.
• Check heater for damage before each use. Do not use a dam-
aged heater.
• Check hose before each use of heater. If highly worn or cut,
replace before using heater.
• Locate heater on stable and level surface if heater is hot or operating.
• Not intended for use on finished floors.
• Never block air inlet (rear) or air outlet (front) of heater.
• Keep heater away from strong drafts, water spray, rain, or drip-
ping water.
• Do not leave heater unattended.
• Keep children and animals away from heater.
• Never move, handle, or service a hot, operating, or plugged-in
heater. Severe burns may result. Wait 20 minutes after turning
heater off.
WARNING:Thisproductcontainsand/orgenerates
chemicals known to the State of California to cause
cancer or birth defects, or other reproductive harm.
SAFETY INFORMATION

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PRODUCT IDENTIFICATION
Figure 1 - 50,000 BTU/Hr Model
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.
PROPANE SUPPLY
Propane gas and propane tank(s) are to be furnished by the user.
Usethis heateronlywith apropanevapor withdrawalsupply system.
SeeChapter5 of theStandardfor Storage andHandlingof Liquefied
Petroleum Gas, ANSI/NFPA 58 and/or CAN/CGA B149.2. Your
local library or fire department will have this booklet.
Theamountofpropanegasreadyforusefrompropanetanksvaries.
Two factors decide this amount:
1. The amount of propane gas in tank(s)
2. The temperature of tank(s)
This heater is designed to operate with a minimum 20-pound
propane tank. You may need two or more tanks or one larger tank
in colder weather. Use a 100-pound tank for longer operation or in
very cold weather. Less gas is vaporized at lower temperatures.
Yourlocalpropanegasdealerwillhelpyouselectthepropersupply
system. The minimum surrounding air temperature rating for each
heater is -20°F (-29°C).
Average Number Of
Temperature (°F) Tanks
At Tank Location (100-pound)
40°1
32°1
20°1
10°1
0°1
-10°2
-20 °2
Power
Cord
Hose /
Regulator
Assembly
Valve Inlet
Handle
Shell
Hot Air Outlet
(Front)
Fan
Piezo Ignitor
Button
Automatic Control
Valve Knob
Motor
Heater Base
• To prevent injury, wear gloves when handling heater.
• Never attach duct work to heater.
• Do not alter heater. Keep heater in its original state.
• Do not use heater if altered.
• Turn off propane supply and unplug heater when not in use.
• 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.
SAFETY INFORMATION
Continued
SAFETY INFORMATION
PRODUCT IDENTIFICATION
UNPACKING
PROPANE SUPPLY

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INSTALLATION
WARNING: Review and understand the warnings
inthe SafetyInformation section,pages2and3.They
are needed to safely operate this heater. Follow all
local codes when using this heater.
1. Provide propane supply system (see Propane Supply, page 3).
2. Connect fuel gas fitting on hose/regulator assembly to pro-
panetank(s).Turnfuel gasfittingcounterclockwiseinto threads
on tank. Tighten firmly using a wrench. IMPORTANT: Posi-
tion regulator so that hose leaving the regulator is in a hori-
zontal position (see Figure 6, page 5). This places the regula-
tor vent in the proper position to protect it from the weather.
WARNING: Test all gas piping and connections
for leaks after installation 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.
THEORY OF OPERATION
The Fuel System: The hose/regulator assembly attaches to the
propane gas supply. This provides fuel to the heater.
TheAirSystem:Themotorturnsthefan.Thefanpushesairintoand
around the combustion chamber. This air is heated and provides a
stream of clean, hot air.
The Ignition System: The piezo ignitor lights the burner.
The Automatic Control System: This system causes the heater to
shut down if the flame goes out.
Figure 2 - Cross Section Operational View
ASSEMBLY
1. Remove screw from top of fan guard (see Figure 3). Dis-
card screw.
2. Insert nut clip (provided with handle) with flat side facing up
through slot in top of shell. Align holes in nut clip with screw
hole behind slot in top of shell. (see Figure 4).
3. Place handle over hole and clip. Insert two screws (provided with
handle)throughhandleandtightenintoshell.Makesurerearscrew
goes through shell and into fan guard. Tighten screws firmly.
Figure 3 - Removing Screw from Top of Fan Guard
Figure 4 - Installing Nut Clip
Figure 5 - Attaching Handle
Screw
Nut Clip
Slot
Shell
Screws
Handle
Rear of
Heater
Nut Clip
Flat Side Facing Up
Air For Combustion Air For Heating
Combustion
Chamber Motor
Clean
Heated
Air Out
(Front)
Hose/
Regulator
Assembly
Cool Air
In (Back)
Fan
THEORY OF OPERATION
ASSEMBLY
INSTALLATION

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Valve Inlet
Hose
Knob
Propane
Tank
Propane
Supply
Valve
Regulator
Hose
Fuel Gas
Fitting
Figure 6 - Regulator Position
WARNING: 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 that must be
corrected. Correct all leaks at once.
Figure 7 - Hose and Inlet Connector
VENTILATION
WARNING: Provide at least a 1.5 square foot
opening of fresh, outside air while running heater. If
proper fresh, outside air ventilation is not provided,
carbonmonoxidepoisoningcanoccur.Provideproper
fresh, outside air ventilation before running heater.
OPERATION
WARNING: Review and understand the warnings
inthe
SafetyInformation section,pages2and3.They
are needed to safely operate this heater. Follow all
local codes when using this heater.
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 CordWire Size Requirements
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, 3-hole, grounded
outlet.Motorwillstart.Fanwillturn,forcing airoutfront ofheater.
5. Open propane supply valve on propane tank(s) slowly. Note:
If not opened slowly, excess-flow check valve on propane tank
may stop gas flow. If this happens, close propane supply valve
and open again slowly.
3. Connect hose to valve inlet. Tighten firmly using a wrench.
You must use the regulator supplied with heater.
4. Open propane supply valve on propane tank(s) slowly.
Note:
If not opened slowly, excess-flow check valve on propane tank
may stop gas flow. If this happens, close propane supply valve
and open again slowly.
5. Check all connections for leaks.Apply mixture of liquid soap
and water to gas joints. Bubbles forming show a leak that must
be corrected.
6. Close propane supply valve.
INSTALLATION
Continued
WARNING:Besuremotorandfanarerunningbefore
pushingin automaticcontrolvalvebutton.Flamescould
flash outside heater if motor and fan are not running.
6. Turn control knob to the low position and push in (see Figure
8 and 9, page 6). Hold knob in and push piezo ignitor button.
You may need to push piezo ignitor button 3-8 times until the
main burner lights. When main burner lights, keep automatic
control valve knob pushed in. Release button after 30 seconds.
Note: If main burner fails to light, hose may have air in it. If
so, keep control knob pressed and wait 20 seconds. Release
control knob and wait 20 seconds for unburned fuel to exit
heater. Repeat step 6.
INSTALLATION
VENTILATION
OPERATION
To Start Heater

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MAINTENANCE
WARNINGS
• Never service heater while it is plugged in, con-
nected to propane supply, operating, or hot. Se-
vere burns and electrical shock can occur.
• Keep heater clear and free from combustible
materials, gasoline, and other flammable vapors
and liquids.
• Do not block the flow of combustion or ventila-
tion air.
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. Use household cleaners on difficult spots.
2. Inspect heater before each use. Check connections for leaks.
Applymixtureof liquid soap and watertoconnections.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 ob-
jects. Remove motor and other internal parts if needed to clean
inside of heater (see Service Procedures, page 8).
6. Clean fan blades each season or as needed (see Fan, page 8).
STORAGE
1. Store propane tank(s) in safe manner. See Chapter 5 of Stan-
dard for Storage and Handling of Liquefied Petroleum Gases,
ANSI/NFPA 58. Follow all local codes. Always store propane
tanks outdoors.
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. Remove motor and other internal parts if needed to re-
move foreign objects (see Service Procedures, page 8).
CAUTION: Disconnect heater from propane sup-
ply tank(s).
TO STOP HEATER
1. Tightly close propane supply valve on propane tank(s). Allow
heater to burn remaining fuel in hose.
2. Shut off main burner valve. Do this by turning control knob to
the OFF position until it stops.
TO RESTART HEATER
1. Wait five minutes after stopping heater.
2. Repeat steps under To Start Heater, page 5.
OPERATION
Continued
OFF
MED
HIGH
START/
LOW
Figure 8 - Control Knob Positions
Figure 9 - Automatic Control Valve Button and Piezo Ignitor
Button
7. If main burner goes out, repeat step 6, page 5.
8. When main burner remains lit, rotate control knob to the de-
sired heat level.
Piezo Ignitor
Button
Automatic
Control Valve
Knob
OPERATION
To Start Heater (Cont.)
To Stop Heater
To Restart Heater
STORAGE
MAINTENANCE

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REMEDY
1. Check voltagetoelectricaloutlet. If volt-
age is good, check heater power cord for
breaks
2. Adjust motor/fan guard tokeepfanfrom
hitting inside of heater shell. Bend fan
guard if necessary
3. Replace fan. See Fan, page 8
4. Replace motor. See Motor, page 8
1. Repeat installation and operation in-
structions. See Installation, page 5 and
Operation, pages 5 and 6
2. A) Check ignitor wire. Tighten or reat-
tach loose ignitor wire. See Figure 17,
page 9 for ignitor wire location
B)Setgapbetweenignitor electrode and
target plate to .17"
C) Tighten nut holding piezo ignitor to
base of heater
D) Replace ignitor electrode. See Igni-
tor, page 9
1. This can happen when running heater in
temperatures above 85°F. Run heater in
cooler temperatures
2. Check heater inlet and outlet. Remove
any obstructions
3. Replace fan. See Fan, page 8
4. Clean heater. See Maintenance, page 6
POSSIBLE CAUSE
1. No electrical power to heater
2. Fan hitting inside of heater shell
3. Fan blades bent
4. Defective motor
1. User did not follow installation or op-
eration instructions properly
2. No spark at ignitor. To test for spark, fol-
low step 9 under Ignitor, page 9. If you
see spark at ignitor, have heater serviced
by qualified service person. If no spark
seen:
A) Loose or disconnected ignitor wire
B) Wrong spark gap
C) Piezo ignitor loose
D) Bad ignitor electrode
1. High surrounding air temperature caus-
ing thermal limit device to shut down
heater
2. Restricted air flow
3. Damaged fan
4. Excessive dust or debris in surrounding
area
OBSERVED FAULT
Fandoesnotturnwhenheaterisplugged in.
Heater will not ignite.
Heater shuts down while running.
WARNING:Neverserviceheaterwhileitisplugged
in, connected to propane supply, operating, or hot.
Severe burns and electrical shock can occur.
TROUBLESHOOTING
WARNING: Use only in areas free of high dust content.
Note: Foradditionalhelp,visitDESAInternational’sTechnical
Service web site at www.desatech.com.
TROUBLESHOOTING

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FAN
1. Remove three screws that attach fan guard to heater shell.
2. Remove motor and fan guard from heater shell (see Figure 10).
3. Use hex wrench to loosen set screw that holds fan to motor
shaft (see Figure 11).
4. Remove fan. Be careful not to damage the fan blade pitch.
5a. If replacing fan, remove old fan and discard. Go to step 7 below.
5b. If cleaning fan,use soft cloth moistened with kerosene or solvent.
6. Dry fan thoroughly.
7. Place fan onto motor shaft. Make sure set screw contacts flat sur-
faceonmotorshaft.Tightensetscrew firmly(40-50inch-pounds).
8. Place motor and fan guard into rear of heater shell. Make sure
power cord is properly located (see Figure 13).
9. Insert three screws through heater shell and into fan guard.
Tighten screws firmly.
SERVICE PROCEDURES
WARNING:Neverserviceheaterwhileitisplugged
in, connected to propane supply, operating, or hot.
Severe burns and electrical shock can occur.
ELECTRICAL SYSTEM
The entire electrical system for this heater is contained within the
motor. If any part of the electrical system is damaged, you must
replace motor.
MOTOR
1. Remove three screws that attach fan guard to heater shell.
2. Remove motor and fan guard from heater shell (see Figure 10).
3. Use hex wrench to loosen set screw which holds fan to motor
shaft (see Figure 11). Remove fan. Be careful not to damage
the fan blade pitch.
4. Remove two nuts and two screws that attach fan guard to motor
usingnut-driver.Removefanguardfrom motor (see Figure 12).
5 Disconnect the green power cord wire from motor and remove
black and white wire terminals.
6. Discard old motor.
7. Attach green power cord wire to motor.
8. Attach fan guard to new motor with two nuts and two screws.
9. Replace black and white terminals.
10. Place fan onto motor shaft of new motor. Make sure set screw
contacts flat surface on motor shaft. Tighten set screw firmly
(40-50 inch-pounds).
11. Place motor and fan guard into rear of heater shell. Make sure
power cord is properly located (see Figure 13).
12. Insert three screws through heater shell and into fan guard.
Tighten screws firmly.
Figure 10 - Removing Motor and Fan Guard from Heater
Figure11-SetscrewLocation Figure 12 - Removing or
AttachingFanGuardfromMotor
Figure 13 - Replacing Motor and Fan Guard into Heater
Setscrew
SERVICE PROCEDURES
Electrical System
Motor
Fan

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IGNITOR
1. Remove motor and fan guard from heater (see Motor, page 8,
steps 1 through 5).
2. Remove black ignitor wire from piezo ignitor. Access ignitor
wire through underside of heater base (see Figure 14). Push
wire up through bushing in heater shell.
3. Remove ignitormountingscrew from rearheadusing nut-driver
or standard screwdriver (see Figure 15).
4. Remove ignitor from rear head.
5. Install new ignitor. Attach ignitor to rear head with ignitor
mounting screw.
6. Run ignitor wire from new ignitor through bushing in heater
shell. Attach ignitor wire to piezo ignitor.
7. Set gap between ignitor electrode and target plate to .17" (see
Figure 16).
SERVICE PROCEDURES
Continued
Rear Head
Figure 15 - Removing Ignitor Mounting Screw and Ignitor
Figure 14 - Removing Ignitor Wire from Piezo Ignitor
Ignitor
Ignitor
Mounting
Screw
Bushing
Piezo Ignitor
Underside of
Heater Base
Ignitor Wire
Target Plate
Gap
Area
Figure 16 - Clearance between Ignitor Electrode and Target
Plate
Ignitor
Electrode
WARNING: Make sure heater is disconnected
from propane supply. Heater could ignite causing
severe burns.
8. Test for spark. Push piezo ignitor button and watch for spark
between ignitor electrode and target plate.
9. Place motor and fan guard into rear of heater shell (see Motor,
page 8, steps 9 through 10).
SERVICE PROCEDURES
Ignitor

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28
27
15
17
18
21
1
2
3
2
4
6
7
9
11
21
22
23
24
25
19
2
10
26
16
12 13
14 5
20
20
8
ILLUSTRATED PARTS
BREAKDOWN
MODELS: BLP50VA, REM50PVA
RLP50VA, RM50PVA
ILLUSTRATED PARTS BREAKDOWN
Models BLP50VA, REM50PVA, RLP50VA, RM50PVA

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PARTS LIST
MODELS: BLP50VA, REM50PVA
RLP50VA, RM50PVA
This list contains replaceable parts used in your heater. When
ordering parts, follow the instructions listed under Replacement
Parts on page 12 of this manual.
PARTS LIST
Models BLP50VA, REM50PVA, RLP50VA, RM50PVA
KEY PART
NO. NO. DESCRIPTION QTY.
1 ** Combustion Chamber 1
2 M11084-26 Hex Tap Screw, #10-16 x 3/8" 7
3 105333-03AB Outer Shell (BLP50VA) 1
105333-02 Outer Shell (RM50PVA and REM50PVA) 1
105333-01 Outer Shell (RLP50VA) 1
4 104786-01 Handle Kit 1
5 M11143-1 Bushing, Strain Relief 1
6 101480-12 Wire Assembly 1
7 M11084-27 Hex Tap Screw, #12-14 x 1/2" 3
8 099393-03 Knob, Control 1
9 105341-01 Burner Assembly 1
10 099539-01 Electrode Ignitor 1
11 M11084-38 Hex Tap Screw, #8-18 x 3/8" 1
12 101478-03 Fan 1
13 105332-01 Motor 1
14 103863-01 Fan Guard 1
15 097384-02 Captive Washer Nut 3
16 097968-05 Hex Screw, #4-40 x 1/2" 2
17 NPC-00C Hex Nut, #4-40 2
18 101481-04 Thermal Switch 1
19 097776-01 Universal Bushing 1
20 099237-01 Thermocouple Nut 2
21 104146-01 Thermocouple 1
22 103921-01 Valve/Orifice Assembly 1
23 102445-01 Piezo Ignitor 1
24 078978-03 Sleeve Cap 1
25 105335-01 Base Assembly 1
26 099202-02 Steel Rivet, 1/8" 1
27 M12461-14 Hex Screw, 8-32 x 3/8 2
28 098219-25 Cord, Power Supply 1
PARTS AVAILABLE - NOT SHOWN
097941-28 Tradename Decal (RLP50VA) 2
097647-10 Tradename Decal (BLP50VA) 2
097941-29 Tradename Decal (RM50PVA) 2
099596-16 Tradename Decal (REM50PVA) 2
103867-05 General Information Decal 1
103869-03 Operation Decal 1
099672-01 Notice Decal 1
** Not a field replaceable part.

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SPECIFICATIONS
Output Rating (BTU/Hr)
High......................................................50,000
Medium ................................................40,000
Low ......................................................30,000
Fuel ............................................................Propane Vapor Only
Fuel Consumption
Gallons/Hour ........................................2.19 / 1.09
Pounds/Hour.........................................9.28 / 4.64
Supply Pressure To Regulator
Minimum (for input adjustment)..........10 psi
Maximum .............................................200 psi
Regulator Outlet Pressure
High......................................................18" WC
Manifold Pressure
High......................................................13.7" WC
Low ......................................................17" WC
Hot Air Output (CFM Approx) .................275
Motor .........................................................3,300 RPM, 1/20 HP
Electric Input .............................................120 volt/60 hertz
Amperage ..................................................2
Ignition ......................................................Manual, Piezo
Ignitor Gap.................................................0.17"
Temperature Range for Operation*...........-20°F to 85°F *
Heater Weight (Pounds) ............................13
Shipping Weight ........................................15
Size - L x W x H (Inches)
Heater ...................................................18.5 x 8.0 x 12.8
Carton...................................................19.4 x 9.75 x 14.75
* When running heater in temperatures above 85° F, high internal
temperatures may cause thermal limit device to shut down heater.
Parts Under Warranty
Contact authorized dealers of this product. If they can’t supply
original replacement part(s), either contact your nearest authorized
service center or call DESA International’s Technical Service
Department at 1-866-672-6040.
When calling DESA International, have ready
• your name
• your address
• model number 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 can’t supply
original replacement part(s), either contact your nearest Parts Cen-
tral or call DESA International at 1-866-672-6040 for referral
information.
When calling DESA International, have ready
• model number of your heater
• the replacement part number
REPLACEMENT PARTS
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.
ACCESSORIES
Purchase accessories and parts from your nearest dealer or service
center. If they can not supply an accessory or part, either contact
yournearestPartsCentral(listedintheseparateAuthorizedService
Center booklet) or contact DESA International for information.
DESA International
P.O. Box 90004
Bowling Green, KY
42102-9004
1-866-672-6040
Part Number Description
LPA3055 Hose/Regulator Assembly
U.L. listed.
LPA4020 Fuel Gas Connector
Connects regulator to all standard propane
tanks. U.L. and A.G.A. listed.
SPECIFICATIONS
ACCESSORIES
REPLACEMENT PARTS
TECHNICAL SERVICE
TECHNICAL SERVICE
Youmayhavefurtherquestionsaboutthisheater.Ifso,contactDESA
International’s Technical Service Department at 1-866-672-6040.
When calling, please have your model and serial numbers of your
heater ready.
YoucanalsovisitDESAInternational’sTechnicalServicewebsite
at www.desatech.com.

105331-01C
13
13
For more information, visit www.desatech.com
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 International:
Complete registration form and mail or complete on-line registration at www.desatech.com within 30 days after purchase.
Not Somewhat Very
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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
TM
TAPE
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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

105331-01C
16
For more information, visit www.desatech.com
For more information, visit www.desatech.com
105331-01
Rev. C
10/02
LIMITED WARRANTY
DESAInternational warrantsthis product andany partsthereof, to be free fromdefects in materials and workmanshipfor one (1)year fromthe date
offirstpurchasewhenoperated andmaintainedinaccordance withinstructions.Thiswarranty isextendedonlyto theoriginalretail purchaser,when
proof of purchase is provided.
This warranty covers only the cost of parts and labor required to restore the product to proper operating condition. Transportation and incidental
costs 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.
THIS EXPRESS WARRANTY IS GIVEN IN LIEU OF ANY OTHER WARRANTY EITHER EXPRESSED OR IMPLIED, INCLUDING
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
DESAInternationalassumesnoresponsibilityforindirect,incidentalorconsequentialdamages.Somestatesdonotallowtheexclusionorlimitation
of incidental or consequential damages, or limitations or exclusions may not apply to you. This Limited Warranty gives you specific legal rights
and you may also have other rights which vary from state to state.
KEEP THIS WARRANTY
WARRANTY AND REPAIR SERVICE
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 requireservice, return itto your nearestauthorized service center.Proof ofpurchasemust bepresentedwith the heater.The heater will
be inspected. A defect may be caused by faulty materials or workmanship. If so, DESA International 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 for information regarding your heater, be sure to include the model number and serial number as shown on the model plate.
For more information about this warranty, write:
Model
Serial No.
Date of Purchase
NOT A UPC
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
ATTN: Customer Service Department
TM
105331 01