10UNVENTED NATURAL GAS LOG HEATER103424INSTALLING HEATER BASEASSEMBLYWARNING: If installing in asunken fireplace, special care isneeded. You must raise the fire-place floor to allow access toheater control panel. This will in-sure adequate air flow and guardagainst sooting. Raise fireplacefloor with noncombustible mate-rial. Make sure material is secure.CAUTION: Do not pick upheater base assembly by burn-ers. This could damage heater.Only handle base assembly bygrates.IMPORTANT: Make sure the heater burn-ers are level. If heater is not level, heater willnot work properly. For thermostat models,avoid damage to thermostat bulb. Avoidnicks or sharp bends in thermostat bulbwire. Keep thermostat bulb in mountingbracket.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" masonry drill bit1. Apply pipe joint sealant lightly to malethreads of gas connector. Install intoregulator. Connect approved flexiblegas hose to gas regulator of heater (seeFigure 11, page 11).IMPORTANT: Hold gas regulator withwrench when connecting gas fittings.2. Position heater base assembly in fire-place.3. Mark screw locations through holes infront of base. If installing in a brick-bottom fireplace, mark screw locationsin mortar joint of bricks.WARNING: You must securethis heater to fireplace floor. Ifnot, heater will move when youadjust controls. Moving heatermay cause a gas leak.INSTALLING DAMPERCLAMP ACCESSORY FORVENTED OPERATIONNote: When used as a vented heater, appli-ance must be installed only in a solid-fuelburning fireplace with a working flue andconstructed of noncombustible material.If your heater is a manually-controlledmodel, you may use this heater as a ventedproduct. There are three reasons for operat-ing your heater in the vented mode.1. The fireplace does not meet theclearance to combustibles requirementsfor vent-free operation.2. State or local codes do not permit vent-free operation.3. You prefer vented operation.If reasons number 1 or 2 above apply to you,you must permanently open chimney fluedamper. You must install the damper clampaccessory (to order, see Accessories, page22). This will insure vented operation (seeFigure 10). The damper clamp will keepdamper open. Installation instructions areincluded with clamp accessory.See chart below for minimum permanentflue opening you must provide. Attachdamper clamp so the minimum permanentflue opening will be maintained at all times.Area of Various StandardRound FluesDiameter (in.) Area (sq. in.)5" 20 sq. inches6" 29 sq. inches7" 39 sq. inches8" 51 sq. inchesChimney Minimum PermanentHeight (ft.) Flue Opening (sq. in.)6' to 15' 39 sq. inches15' to 30' 29 sq.inchesDamperDamperClampDamperClamp DamperDamperManufactured FireplaceMasonry FireplaceFigure 10 - Attaching Damper ClampINSTALLATIONContinuedCAUTION: Do not remove themetal data plates attached to theheater base assembly. The dataplates contain important warrantyinformation.