www.desatech.com 119162-01H2SAFETyTAbLE OF CONTENTSSafety................................................................... 2Product Identification............................................ 5Local.Codes......................................................... 5Optional.Remote.Control.Accessories.................. 5Unpacking............................................................ 5Product.Features.................................................. 6Air.For.Combustion.and.Ventilation...................... 6Installation............................................................ 8Operation............................................................ 22Inspecting.Burners............................................. 26Wiring.Diagram................................................... 26Cleaning.and.Maintenance................................. 26Troubleshooting.................................................. 28Parts................................................................... 32Specifications..................................................... 36Service.Hints...................................................... 36Technical.Service............................................... 36Replacement.Parts............................................. 36Accessories........................................................ 37Warranty...............................................Back.CoverWARNING: Improperinstallation, adjustment,alteration, service or main-tenance can cause injuryor property damage. Referto this manual for correctinstallation and operation-al procedures. For assis-tance or additional infor-mation consult a qualifiedinstaller, service agencyor the gas supplier.WARNING: This ap-pliance is for installationonly in a solid-fuel burningmasonry or UL127 fac-tory-built fireplace or in alisted ventless firebox en-closure. It is design-certi-fied for these installationsin accordance 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 manufacturer