www.desatech.com 119169-01E2SAFETY INFORMATIONWARNING: Improper in-stallation, adjustment, al-teration, service or mainte-nance can cause injury orproperty damage. Refer tothis manual for correct in-stallation and operationalprocedures. For assis-tance or additional infor-mation consult a qualifiedinstaller, service agency orthe gas supplier.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 5of this manual.This appliance is only foruse with the type of gasindicated on the ratingplate. This appliance isnot convertible for usewith other gases.This appliance may be in-stalled in an aftermarket,*permanently located,manufactured (mobile)home, where not prohib-ited by local codes.* Aftermarket: Completion of sale, not forpurpose of resale, from the manufacturerWARNING: This productcontains and/or generateschemicals known to the Stateof California to cause cancer orbirth defects or other reproduc-tive harm.IMPORTANT: Read this owner’smanual carefully and completelybefore trying to assemble,operate or service this heater.Improper use of this heater cancause serious injury or deathfrom burns, fire, explosion,electrical shock and carbonmonoxide poisoning.TABLE OF CONTENTSSafety Information ............................................... 2Local Codes......................................................... 4Product Identification ........................................... 4Unpacking............................................................ 4Product Features ................................................. 4Air For Combustion and Ventilation ..................... 5Installation ........................................................... 7Operating Heater ............................................... 15Inspecting Heater .............................................. 17Cleaning and Maintenance ................................ 18Troubleshooting ................................................. 19Specifications .................................................... 23Service Hints ..................................................... 23Replacement Parts ............................................ 23Technical Service............................................... 23Service Publications .......................................... 23Illustrated Parts Breakdown and Parts List........ 24Wiring Diagrams ................................................ 26Accessories ....................................................... 26Parts Centrals .................................................... 27Warranty Information ...........................Back Cover