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103868

OWNER’S MANUAL

VENTILATION

OPERATION

 WARNING: Review and un-

derstand the warnings in the
Safety Information section, page
2. They are needed to safely op-
erate this heater. Follow all local
codes when using this heater.

 WARNING: Provide at least a

1.5 square foot opening of fresh,
outside air while running heater.
If proper fresh, outside air venti-
lation is not provided, carbon
monoxide poisoning can occur.
Provide proper fresh, outside air
ventilation before running heater.

To Start Heater

1.

Follow all installation, ventilation, and
safety information.

2.

Locate heater on stable and level sur-
face. Make sure strong drafts do not
blow into front or rear of heater.

3.

Plug power cord of heater into a three-
prong, grounded extension cord. Exten-
sion cord must be at least six feet long.
Extension cord must be UL listed.

Extension Cord Wire Size Re-
quirements

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. Motor
will start. Fan will turn, forcing air out
front of heater.

5.

Open propane supply valve on propane
tank(s) slowly. 

Note:

 If not opened

slowly, excess-flow check valve on pro-
pane tank may stop gas flow. If this
happens, close propane supply valve
and open again slowly.

6.

Turn control knob to the low position

and push in (see Figure 5). 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 auto-
matic 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. Re-
lease control knob and wait 20 seconds
for unburned fuel to exit heater. Repeat
step 4.

7.

If main burner goes out, repeat step 4.

8.

When main burner remains lit, rotate
control knob to the desired heat level.

 WARNING: Be sure motor and

fan are running before pushing
in  automatic control valve but-
ton. Flames could flash outside
heater if motor and fan are not
running.

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 posi-
tion until it stops.

To Restart Heater

1.

Wait five minutes after stopping heater.

2.

Repeat steps under To Start Heater,
column 1.

Piezo Ignitor
Button

Automatic Control
Valve Knob

Figure 6 - Automatic Control Valve Button
and Piezo Ignitor Button

OFF

MED

HIGH

START/
LOW

Figure 5 - Control Knob Positions

STORAGE

1.

Store propane tank(s) in safe manner.
See Chapter 5 of Standard for Storage
and Handling of Liquefied Petroleum
Gases, ANSI/NFPA 58. 
Follow all lo-
cal 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 in-
side heater combustion chamber.

4.

When taking heater out of storage, al-
ways check inside of heater. Insects and
small animals may place foreign ob-
jects in heater. Remove motor and other
internal parts if needed to remove for-
eign objects (see Service Procedures,
page 7).

 CAUTION: Disconnect heater

from propane supply tank(s).

Summary of Contents for BLP50V

Page 1: ...ATION CARBON MONOXIDE POI SONING AND OR ELECTRICAL SHOCK ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE INSTRUCTIONS SHOULD USE OR SERVICE THIS HEATER IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS AN INSTRUCTIONS MANUAL LABELS ETC CONTACT THE MANUFACTURER Models RLP50V BLP50V and REM50PV IMPORTANT Readandunderstandthismanualbeforeassembling starting orservicingheater Improper use of heater ...

Page 2: ...hock hazard and should be plugged directly into a properly grounded three prong receptacle Use only a three prong grounded exten sion cord Use only the hose and factory preset regulator provided with the heater Use only propane gas set up for vapor withdrawal Provide adequate ventilation Before us ing heater provide at least a 1 5 square foot opening of fresh outside air This heater produces carbo...

Page 3: ...withdrawal supply system See Chapter 5 of the Standard for Storage and Handling of Liquefied Petroleum Gas ANSI NFPA 58 and or CAN CGA B149 2 Your local li braryorfiredepartmentwillhavethisbook let The amount of propane gas ready for use from propane tanks varies Two factors de cide this amount 1 The amount of propane gas in tank s 2 The temperature of tank s This heater is designed to operate wit...

Page 4: ...quidsoapandwatertoalljoints Bubbles forming show a leak Correct all leaks at once Knob THEORY OF OPERATION Combustion Chamber The Fuel System The hose regulator assembly attaches to the propane gas sup ply This provides fuel to the heater The Air System The motor turns the fan The fan pushes air into and around the combustion chamber This air is heated and provides a stream of clean hot air The Ig...

Page 5: ...hts keep auto matic 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 Re lease control knob and wait 20 seconds for unburned fuel to exit heater Repeat step 4 7 If main burner goes out repeat step 4 8 When main burner remains lit rotate control knob to the desired heat level WA...

Page 6: ...nitor 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 Fan does not turn when heater is plugged in Heater will not ignite Heater shuts down while running WARNING Never service heater while it is plugged in connected to propane supply operating or hot Sever...

Page 7: ...hing fan guard to motor you must position power cord as shown in Figure 9 Tighten nuts firmly 8 Place fan onto motor shaft of new mo tor IMPORTANT When placing fan onto motor shaft make sure part number stamped on fan is facing motor Attach fan nut to end of motor shaft Tighten fan nut firmly 9 Place motor and fan guard into rear of heater shell Make sure power cord is properly located see Figure ...

Page 8: ...aft Figure 11 Removing Motor and Fan Guard from Heater Figure 13 Replacing Motor and Fan Guard into Heater Fan 1 Remove three screws that attach fan guard to heater shell 2 Remove motor and fan guard from heater shell see Figure 11 3 Use pliers to remove the fan nut from front of motor shaft see Figure 12 4a If replacing fan remove old fan and discard Go to step 7 below 4b If cleaning fan remove f...

Page 9: ...ll ask you to return the defective 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 Central or call DESA International s Parts Department at 1 800 972 7879 for referral information When calling DESA International have ready model number of your heater the replacement part numbe...

Page 10: ... 103868 PROPANE CONSTRUCTION HEATER 50 000 BTU HR 1 2 3 2 4 6 7 9 11 21 22 23 24 25 19 20 21 5 10 27 16 12 13 14 15 Fan Nut Fan Rubber Washer Motor Motor Assembly 17 26 18 26 8 ILLUSTRATED PARTS BREAKDOWN ...

Page 11: ...n 1 13 103864 01 Motor Assembly Includes Rubber Washer and Fan Nut 1 14 099540 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 05 Thermal Switch Kit 1 19 097776 01 Universal Bushing 1 20 099542 01 Wire Clip 1 21 103919 01 Thermocouple Kit 1 22 103921 01 Valve Orifice Assembly 1 23 102445 01 Piezo Ignitor 1 24 078978 03 Sleeve...

Page 12: ...e 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 PUR POSE DESA International assumes no responsibility for indirect incidental or consequential damages Some states do not allow the exclusion or limitation of incidental or consequential damages or limitat...

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