Desa LP155AT Owner'S Manual Download Page 5

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For more information, visit www.desatech.com

For more information, visit www.desatech.com

VENTILATION

WARNING: Follow the minimum fresh, outside air

ventilation requirements.  If proper fresh, outside air
ventilation is not provided, carbon monoxide poison-
ing can occur. Provide proper fresh, outside air ven-
tilation before running heater.

Provide a fresh air opening of at least three square feet for each
100,000 Btu/Hr rating. Provide extra fresh air if more heaters are
being used.

VENTILATION

OPERATION

STORAGE

MAINTENANCE

OPERATION

 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.

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 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.

6.

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 po-

sition. Wait ten seconds for safety control to reset, then try again.

Note:

 If heater still does not start after turning thermostat knob to

a higher position, the high temperature switch may have opened
during thermostat shut down. Allow high temperature switch to
reset. This usually takes 10-15 minutes. Try starting heater again
after switch resets.

TO STOP HEATER

1.

Tightly close propane 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.

STORAGE

 CAUTION: Disconnect heater from propane sup-

ply tank(s).

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 
and/or 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.

MAINTENANCE

 WARNING: Never service heater while it is plugged

in, connected to propane supply, operating, or hot.
Severe burns and electrical shock can occur.

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.
Apply mixture of liquid soap and 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.

Summary of Contents for LP155AT

Page 1: ... CAN RESULT IN DEATH SERIOUS BODILY INJURY AND PROPERTY LOSS OR DAMAGE FROM HAZARDS OF FIRE EXPLOSION BURN ASPHYXIATION CARBON MONOX IDE POISONING 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 TABLE OF CONTENTS SAFET...

Page 2: ...inances and codes refer to the Standard for Storage and Handling of Liquefied Petroleum Gas ANSI NFPA 58 and the Propane Gas Installation Code CAN CGA B149 2 This instructs 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 follow the National Electric Code ANSI NFPA 7...

Page 3: ...uel System The hose regulator assembly attaches to the propane gas supply The propane gas moves through the solenoid valve and out the nozzle The Air System The motor turns the fan The fan pushes air into andaroundthecombustionchamber Thisairisheatedandprovides a stream of clean hot air The Ignition System The direct spark ignitor DSI sends voltage to the spark plug ignitor The spark plug ignitor ...

Page 4: ...rming show a leak Correct all leaks at once 1 Provide propane supply system see Propane Supply column 1 2 Connect POL fitting on hose regulator assembly to propane tank s Turn POL fitting counterclockwise into threads on tank Tighten firmly using wrench Tighten regulator with vent pointing down Less gas is vaporized at lower temperatures You may need two or more 100 pound tanks or one larger tank ...

Page 5: ...eater does not start turn on off switch to the OFF po sition Wait ten seconds for safety control to reset then try again Note If heater still does not start after turning thermostat knob to a higher position the high temperature switch may have opened during thermostat shut down Allow high temperature switch to reset This usually takes 10 15 minutes Try starting heater again after switch resets TO...

Page 6: ... 8 hex wrench to loosen setscrew which holds fan to motor shaft 3 Slip fan off motor shaft 4 Clean fan using soft cloth moistened with kerosene or solvent 5 Dry fan thoroughly 6 Replace fan on motor shaft Make sure setscrew is touching back of flat surface on motor shaft see Figure 8 7 Place setscrew on flat of shaft Tighten setscrew firmly 40 50 inch pounds 8 Replace fan guard andupper shell IGNI...

Page 7: ...upted Type Spark Plug Gap Inches N A Ignitor Gap Inches 13 15 Weight Pounds Heater 24 Shipping 35 Size L x W x H Inches 36 1 4 x 14 1 2 x 20 WIRING DIAGRAMS Electrical Connection Diagram Orange Green Automatic Ignition System G V VR ACR AC Position of Leads May Vary Blue Blue White White Black Blue Insulated Connector Solenoid Valve Black Motor Power Cord 120 VAC On Off Switch Black High Temp Swit...

Page 8: ...w desatech com ILLUSTRATED PARTS BREAKDOWN LP155AT MODELS 33 2 1 31 12 26 43 9 32 10 11 38 20 21 6 7 6 5 3 37 34 Note Screws are standard hardware items 28 7 15 17 27 8 14 36 29 39 4 8 13 25 23 16 42 30 20 35 22 24 18 19 41 44 45 46 40 20 47 ILLUSTRATED PARTS BREAKDOWN LP155AT Models ...

Page 9: ...04 05 Shorty Bushing 1 22 M50104 01 Shorty Bushing 1 23 101732 01 Thermal Limit Switch 1 24 097968 05 Screw 4 40 x 1 2 2 25 097384 04 Hex Nut 4 40 Captive Washer 2 26 098511 129 Lower Shell Replacement Part Will Be Black 1 27 098447 03 Side Cover 1 28 098226 01 On Off Switch 1 29 097657 03 Built in Thermostat 1 30 104905 01 Thermostat Knob 1 31 M51104 01 Handle 1 32 M11084 29 Screw 10 16 x 3 4 2 3...

Page 10: ... parts replaced under warranty PARTS 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 s Technical Service Department at 1 800 323 5190 When calling DESA International have ready your name your address model and serial numbers of your heater how heater was malfunctioning p...

Page 11: ..._______________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ ________________________________________________________...

Page 12: ...ity for indirect incidental or consequential damages Some states do not allow the exclusion or limitation 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 For information write DESA Internation...

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