PROPANE CONVECTION CONSTRUCTION HEATEROWNER’S MANUALIMPORTANT: Read and understand this manual beforeassembling, starting, or servicing heater. Improper useof heater can cause serious injury. Keep this manual forfuture reference.GENERAL HAZARD WARNING:Failure to comply with the precautions and instructions pro-vided with this heater, can result in death, serious bodily injuryand property loss or damage from hazards of fire, explosion,burn, asphyxiation, and/or carbon monoxide poisoning.Only persons who can understand and follow the instruc-tions should use or service this heater.If you need assistance or heater information such as an in-structions manual, labels, etc. contact the manufacturer.Variable 15,000/25,000Btu/Hr ModelsSave this manual for future reference.For more information, visit www.desatech.comTABLE OF CONTENTSSafety Information ............................................... 2Product Identification ........................................... 3Unpacking ........................................................... 3Theory of Operation ............................................ 3Ventilation ............................................................ 3Propane Supply ................................................... 4Installation ........................................................... 4Operation ............................................................. 4Storage ................................................................ 5Maintenance ........................................................ 5Inspecting Burner ................................................ 5Specifications ...................................................... 6Technical Service ................................................ 6Troubleshooting ................................................... 6Illustrated Parts Breakdown and Parts List ......... 7Replacement Parts .............................................. 7Warranty and Repair Service .............................. 8