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IMPORTANT: Read and understand this manual before assembling, starting or servicing
heater. Improper use of heater can cause serious injury. Keep this manual for future reference.

LP155AT Models

150,000 Btu/Hr with Built-in Thermostat

PROPANE CONSTRUCTION
HEATER

OWNER’S MANUAL

Save this manual for future reference.

Save this manual for future reference.

For more information, visit www.desatech.com

For more information, visit www.desatech.com

TM

 

GENERAL HAZARD WARNING:

FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONS PROVIDED WITH THIS
HEATER, 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

SAFETY INFORMATION ............................................................ 2

PRODUCT IDENTIFICATION ..................................................... 3

UNPACKING ............................................................................... 3

THEORY OF OPERATION ......................................................... 3

PROPANE SUPPLY .................................................................... 4

INSTALLATION ........................................................................... 4

VENTILATION ............................................................................. 5

OPERATION ............................................................................... 5

STORAGE ................................................................................... 5

MAINTENANCE .......................................................................... 5

SERVICE PROCEDURES .......................................................... 6

SPECIFICATIONS ...................................................................... 7

WIRING DIAGRAMS ................................................................... 7

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ......... 8

ACCESSORIES ........................................................................ 10

TECHNICAL SERVICE ............................................................. 10

REPLACEMENT PARTS .......................................................... 10

WARRANTY AND REPAIR SERVICE ...................................... 12

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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