www.desatech.com 122493-01C12Heater GasRegulatorFlexible Gas Hose(if allowed by local codes)Figure 11 - Attaching Flexible Gas Hoseto Heater Gas RegulatorFittingINSTALLING HEATER BASEASSEMBLYCAUTION: Do not remove thedata plates attached to the heaterbase assembly. The data platescontain important warranty andsafety information.WARNING: You must securethis heater to fireplace floor. Ifnot, heater will move when youadjust controls. Moving heatermay cause a gas leak.INSTALLATIONContinuedArea of Various Standard Round FluesDiameter Area5" 20 sq. inches6" 29 sq. inches7" 39 sq. inches8" 51 sq. inchesChimney Minimum PermanentHeight Flue Opening6' to 15' 39 sq. inches15' to 30' 29 sq. inchesDamperDamperClampDamperDamperClampDamperFigure 10 - Attaching Damper ClampManufactured FireplaceMasonry FireplaceWARNING: If installing in asunken fireplace, special careis needed. You must raise thefireplace floor to allow access toheater control panel. This will in-sure adequate air flow and guardagainst sooting and controls be-ing damaged. Raise fireplace floorwith noncombustible material.Make sure material is secure.CAUTION: Do not pick upheater base assembly by theburner. This could damageheater. Only handle base as-sembly by grates.IMPORTANT: Make sure heater burners arelevel. If heater is not level, heater will notwork properly.Installation Items Needed• hardware package (provided with heater)• approved flexible gas hose (not provided)(if allowed by local codes)• sealant (resistant to propane/LP gas, notprovided)• electric drill with 3/16" drill bit• flathead screwdriver1. Apply pipe joint sealant lightly to malethreads of fitting to be threaded into gasregulator. Connect approved flexible gashose to gas regulator of heater (see Fig-ure 11).IMPORTANT: Hold gas regulator withwrench when connecting flexible gas hose.2. Locate masonry screws in hardwarepackage.3. Position heater base assembly in fire-place.See chart below for minimum permanent flueopening you must provide. Attach damperclamp so the minimum permanent flue open-ing will be maintained at all times.