www.desatech.com 111245-01B2WARNING: 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 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 manufacturerState of Massachusetts: The installation must be made by a licensed plumber or gas fitter in theCommonwealth of Massachusetts.Sellers of unvented propane or natural gas-fired supplemental room heaters shall provide to eachpurchaser a copy of 527 CMR 30 upon sale of the unit.Vent-free gas products are prohibited for bedroom and bathroom installation in the Common-wealth of Massachusetts.TABLE OF CONTENTSSafety Information ............................................... 3Product Identification ........................................... 4Local Codes ........................................................ 5Unpacking ........................................................... 5Product Features ................................................. 5Air for Combustion and Ventilation ...................... 6Installation ........................................................... 8Operating Fireplace ........................................... 25Inspecting Burners ............................................ 28Cleaning and Maintenance ................................ 29Troubleshooting ................................................. 30Specifications .................................................... 33Service Hints ..................................................... 33Technical Service .............................................. 33Illustrated Parts Breakdown and Parts List ....... 34Replacement Parts ............................................ 40Accessories ....................................................... 40Wiring Diagram .................................................. 42Templates .......................................................... 43Parts Central ..................................................... 45