www.desatech.com111604-01L 5LOCAL CODESInstall and use fireplace with care. Follow all localcodes. In the absence of local codes, use the lat-est edition of The National Fuel Gas Code ANSIZ223.1/NFPA 54*.*Available from:American National Standards Institute, Inc.1430 BroadwayNew York, NY 10018National Fire Protection Association, Inc.Batterymarch ParkQuincy, MA 02269Note: Where listed vented decorative logs arerequired, thermostat operation is not permitted.UNPACKINGCAUTION: Do not remove thedata plates attached to the heaterbase assembly. The data platescontain important warranty andsafety information.1. With utility knife, cut the carton all the wayaround above the staples on the bottom tray.Lift the carton off the heater. Remove packing.Note: The hood is located in the packing onthe right hand side of the heater front. Lift theheater off the bottom tray.2. Locate two screws above top corners of thefireplace screen. Remove and discard thesescrews. Lift fireplace screen up and pull outto remove.3. Remove protective packaging applied to logs,log base assembly and fireplace.4. Remove fireplace hood from carton insert.5. Check all items for any shipping damage. Ifdamaged, promptly inform dealer where youbought fireplace.PRODUCT FEATURESOPERATIONThis vent-free fireplace is clean burning. It requiresno outside venting. There is no heat loss out avent or up a chimney. Heat is generated by bothrealistic flames. When used without the blower, thefireplace requires no electricity making it ideal foremergency backup heat. This heater is designedfor vent-free operation. It has been tested and ap-proved to ANSI Z21.11.2 standard for unventedheaters. State and local codes in some areas pro-hibit the use of vent-free heaters.SAFETY DEVICEThis fireplace has a pilot with an Oxygen DepletionSensing (ODS) safety shutoff system. The ODS/pilot is a required feature for vent-free room heat-ers. The ODS/pilot system shuts off the fireplaceif there is not enough fresh air.PIEZO IGNITION SYSTEMThis fireplace has a piezo ignitor. This systemrequires no matches, batteries or other sources tolight fireplace.OPTIONAL BLOWER ASSEMBLY(GA3750 SERIES & GA3650TBSERIES)This fireplace accepts an optional blower assembly(not included). The GA3650TB Series bloweroperates thermostatically and features a variablespeed control. The GA3750 Series blower operatesmanually and also features a variable speed control.The blower circulates heated air from the fireplaceinto the room. See Accessories, page 34.AIR FOR COMBUSTIONAND VENTILATIONWARNING: This heater shallnot be installed in a confinedspace or unusually tight construc-tion unless provisions are provid-ed for adequate combustion andventilation air. Read the followinginstructions to insure proper freshair for this and other fuel-burningappliances in your home.Todayʼs homes are built more energy efficientthan ever. New materials, increased insulation andnew construction methods help reduce heat lossin homes. Home owners weather strip and caulkaround windows and doors to keep the cold air outand the warm air in. During heating months, homeowners want their homes as airtight as possible.While it is good to make your home energy effi-cient, your home needs to breathe. Fresh air mustenter your home. All fuel-burning appliances needfresh air for proper combustion and ventilation.Exhaust fans, fireplaces, clothes dryers and fuelburning appliances draw air from the house tooperate. You must provide adequate fresh air forthese appliances. This will insure proper ventingof vented fuel-burning appliances.