www.desatech.com 112882-01B2WARNING: Improper installation, adjustment, altera-tion, service, or maintenance can cause injury or prop-erty damage. Refer to this manual for correct installationand operational procedures. For assistance or addi-tional information consult a qualified installer, serviceagency, or the gas supplier.WARNING: This appliance is for installation only ina solid-fuel burning masonry or UL127 factory-builtfireplace, or in a listed ventless firebox enclosure. It isdesign-certified for these installations in accordancewith ANSI Z21.11.2. Exception: Do not install this appli-ance in a factory-built fireplace that includes instructionsstating it has not been tested or should not be used withunvented gas logs.WARNING: This is an unvented gas-fired heater. It usesair (oxygen) from the room in which it is installed. Provi-sions for adequate combustion and ventilation air mustbe provided. Refer to Air for Combustion and Ventilationsection on page 6 of this manual.This appliance may be installed in an aftermarket,* per-manently located, manufactured (mobile) home, wherenot prohibited by local codes.This appliance is only for use with the type of gas indi-cated on the rating plate. This appliance is not convert-ible for use with other gases.* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturerTABLE OF CONTENTSSafety Information ............................................... 3Product Identification ........................................... 5Local Codes ........................................................ 5Unpacking ........................................................... 5Product Features ................................................. 5Remote Control Accessories ............................... 5Air For Combustion and Ventilation ..................... 6Installation ........................................................... 8Operating heater ............................................... 19Inspecting Burners ............................................ 22Cleaning and Maintenance ................................ 23Troubleshooting ................................................. 24Wiring Diagram .................................................. 28Service Hints ..................................................... 28Technical Service .............................................. 28Replacement Parts ............................................ 28Specifications .................................................... 28Accessories ....................................................... 29Illustrated Parts Breakdown and Parts List ....... 30Warranty Information ...........................Back Cover