www.desatech.com 119162-01B2SAFETy INFORMATIONTAbLE OF CONTENTSSafety Information ............................................... 2Product Identification ........................................... 5Local Codes......................................................... 5Unpacking............................................................ 5Product Features ................................................. 5Air For Combustion and Ventilation ..................... 6Installation ........................................................... 8Operating Heater ............................................... 19Inspecting Burners............................................. 23Wiring Diagram .................................................. 23Cleaning and Maintenance ................................ 23Troubleshooting ................................................. 25Specifications .................................................... 29Service Hints ..................................................... 29Technical Service............................................... 29Replacement Parts ............................................ 29Illustrated Parts Breakdown and Parts List........ 30Accessories ....................................................... 33Warranty Information ...........................Back CoverWARNING: Improper in-stallation, adjustment, al-teration, 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 applianceis for installation only in asolid-fuel burning mason-ry or UL127 factory-builtfireplace or in a listed vent-less firebox enclosure. It isdesign-certified for theseinstallations in accordancewith ANSI Z21.11.2. Excep-tion: Do not install thisappliance in a factory-builtfireplace that includesinstructions stating it hasnot been tested or shouldnot be used with unventedgas 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