www.desatech.com 113093-01H2SAFETYTABLE OF CONTENTSSafety .................................................................. 2Local Codes......................................................... 5Product Identification ........................................... 5Optional Remote Control Accessories ................. 5Unpacking............................................................ 5Air for Combustion and Ventilation ...................... 6Product Features ................................................. 6Installation ........................................................... 8Operation ........................................................... 18Inspecting Burners............................................. 23Cleaning and Maintenance ................................ 24Replacement Parts ............................................ 25Wiring Diagram .................................................. 25Troubleshooting ................................................. 26Specifications .................................................... 30Service Hints ..................................................... 30Technical Service............................................... 30Accessories ....................................................... 31Parts .................................................................. 32Warranty .............................................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 ap-pliance is for installationonly in a solid-fuel burningmasonry or UL127 fac-tory-built fireplace or ina listed ventless fireboxenclosure. It is design-cer-tified for these installationsin accordance with ANSIZ21.11.2. Exception: Do notinstall this appliance in afactory-built fireplace thatincludes instructions stat-ing it has not been testedor should not be used withunvented 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 manufacturer