www.desatech.com 113097-01L2SAFETyWARNING: 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 ap-pliance is for installationonly in a solid-fuel burningmasonry or UL127 factory-built fireplace or in a listedventless firebox enclo-sure. It is design-certifiedfor these installations inaccordance with ANSIZ21.11.2. Exception: Donot install this appliancein a factory-built fireplacethat includes instructionsstating it has not been test-ed or should not be usedwith unvented gas logs.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 manufacturerTAbLE OF CONTENTSSafety .................................................................. 2Product Identification ........................................... 5Local Codes......................................................... 5Unpacking............................................................ 5Product Features ................................................. 5Air for Combustion and Ventilation ...................... 6Installation ........................................................... 8Operation ........................................................... 19Inspecting Burners............................................. 23Cleaning and Maintenance ................................ 23Service Hints ..................................................... 24Technical Service............................................... 24Troubleshooting ................................................. 25Optional Positioning of Thermostat Sensing Bulb .. 29Specifications .................................................... 30Accessories ....................................................... 31Parts Central...................................................... 31PARTS ............................................................... 32Replacement Parts ............................................ 35Warranty ..............................................Back Cover