110021-01GFor more information, visit www.desatech.comFor more information, visit www.desatech.com2WARNING: Do not use a blower insert, heatexchanger insert, or other accessory not approvedfor use with this heater.WARNING: This appliance is for installation onlyin a solid-fuel burning fireplace or approved ventlessfirebox enclosure.WARNING: Do not allow fans to blow directly intothe fireplace. Avoid any drafts that alter burner flamepatterns. Ceiling fans can create drafts that alterburner flame patterns. Altered burner patterns cancause sooting.Due to high temperatures, the appliance should belocated out of traffic and away from furniture anddraperies.Do not place clothing or other flammable material onor near the appliance. Never place any objects on theheater.Heater base assembly becomes very hot when run-ning heater. Keep children and adults away from hotsurface to avoid burns or clothing ignition. Heaterwill remain hot for a time after shutdown. Allowsurface to cool before touching.Carefully supervise young children when they are inthe room with heater. When using the hand-heldremote accessory (Remote-Ready Models Only), keepselector switch in the OFF position to prevent chil-dren from turning on burners with remote.SAFETY INFORMATIONDANGER: Carbon monoxide poisoning may leadto death!Carbon Monoxide Poisoning: Early signs of carbon monoxidepoisoning resemble the flu, with headaches, dizziness, or nausea.If you have these signs, the heater may not be working properly.Get fresh air at once! Have heater serviced. Some people aremore affected by carbon monoxide than others. These includepregnant women, people with heart or lung disease or anemia,those under the influence of alcohol, and those at high altitudes.Natural and Propane/LP Gas: Natural and propane/LP gases areodorless. An odor-making agent is added to the gas. The odorhelps you detect a gas leak. However, the odor added to the gas canfade. Gas may be present even though no odor exists.Make certain you read and understand all warnings. Keep this manualfor reference. It is your guide to safe and proper operation of this heater.WARNINGSIMPORTANT: Read this owner’s manual carefully andcompletely before trying to assemble, operate, or ser-vice this heater. Improper use of this heater can causeproperty damage and serious injury or death fromburns, fire, explosion, electrical shock, and carbonmonoxide poisoning.WARNING: Any change to this heater or its con-trols can be dangerous.TABLE OF CONTENTSSAFETY INFORMATIONTABLE OF CONTENTSSAFETY INFORMATION ............................................................ 2PRODUCT IDENTIFICATION ..................................................... 4OPTIONAL REMOTE CONTROL ACCESSORIES .................... 4LOCAL CODES ........................................................................... 4UNPACKING ............................................................................... 4PRODUCT FEATURES .............................................................. 5AIR FOR COMBUSTION AND VENTILATION ........................... 5INSTALLATION ........................................................................... 8OPERATING HEATER .............................................................. 17INSPECTING BURNERS .......................................................... 22CLEANING AND MAINTENANCE ............................................ 23TROUBLESHOOTING .............................................................. 24OPTIONAL POSITIONING OF THERMOSTATSENSING BULB ............................................................... 27SPECIFICATIONS .................................................................... 28WIRING DIAGRAM ................................................................... 28ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ....... 29ACCESSORIES ........................................................................ 34OWNER’S REGISTRATION FORM .......................................... 35REPLACEMENT PARTS .......................................................... 37SERVICE HINTS ....................................................................... 37TECHNICAL SERVICE ............................................................. 37WARNING: This product contains and/or generateschemicals known to the State of California to causecancer or birth defects, or other reproductive harm.