www.desatech.com 113109-01G2SAFETYTAbLE OF CONTENTSSafety .................................................................. 2Product Identification ........................................... 4Local Codes......................................................... 5Unpacking............................................................ 5Product Features ................................................. 5Air For Combustion And Ventilation ..................... 6Installation ........................................................... 8Operation ........................................................... 19Inspecting Burner .............................................. 23Cleaning and Maintenance ................................ 24Troubleshooting ................................................. 25Wiring Diagram .................................................. 29Specifications .................................................... 29Replacement Parts ............................................ 29Technical Service............................................... 29Service Hints ..................................................... 29Parts .................................................................. 30Accessories ....................................................... 34Warranty ..............................................Back CoverWARNING: Improperinstallation, adjustment,alteration, service ormaintenance can causeinjury or property dam-age. Refer to this manualfor correct installationand operational proce-dures. For assistance oradditional informationconsult a qualified in-staller, service agency orthe gas supplier.WARNING: This is anunvented gas-fired heat-er. It uses air (oxygen)from the room in whichit is installed. Provisionsfor adequate combustionand ventilation air mustbe provided. Refer to Airfor Combustion and Ven-tilation section on page 6of this manual.This appliance may be in-stalled in an aftermarket,*permanently located,manufactured (mobile)home, where not prohib-ited by local codes.This appliance is only foruse with the type of gasindicated on the ratingplate. This appliance isnot convertible for usewith other gases.* Aftermarket: Completion of sale, not forpurpose of resale, from the manufacturerWARNING: This product con-tains and/or generates chemicalsknown to the state of Californiato cause cancer or birth defectsor other reproductive harm.IMPORTANT: Read this owner’smanual carefully and completelybefore trying to assemble,operate or service this heater.Improper use of this heater cancause serious injury or deathfrom burns, fire, explosion,electrical shock and carbonmonoxide poisoning.