14 Regency ® P121-2/P121LC-2/P121RC-2/P131-2 Zero Clearance Direct Vent Gas FireplaceINSTALLATIONVENTINGINTRODUCTIONThe P121-2/P121LC-2/P121RC-2/P131-2 usesthe "balanced flue" technology Co -Axial system.The inner liner vents products of combustion tothe outside while the outer liner draws outsidecombustion air into the combustion chamberthereby eliminating the need to use heatedroom air for combustion and losing warm roomair up the chimney.Note: These flue pipes must not beconnected to any other appliance.The gas appliance and vent system must bevented directly to the outside of the building,and never be attached to a chimney serving aseparate solid fuel or gas burning appliance.Each direct vent gas appliance must use it'sown separate vent system. Common ventsystems are prohibited. (See "Rigid Pipe VentingSystems" for more details and exceptions).UNIT ASSEMBLYPRIOR TOINSTALLATIONThe 4 Top Standoffs must be correctly positioned and attached to the top before unit is slippedinto position.Top Standoff AssemblyThe top standoffs are shipped in a flat position and must be folded into shape and attached.1) Remove the standoffs from the fireplace top.2) Take each standoff and bend into the correctshape. Bend up at the bend lines until thescrew holes in the standoff and the pre-punched screw holes on the fireplace topline up.3) Attach the standoff securely to the top with4 screws per standoff (on opposite corners).Facing & Finishing RequirementsThis fireplace is supplied with a 3" metal extension trim above the fireplace. The extension trim may be replaced if the framing is faced with a non-combustible material placed flush with the front and side face of the unit and extending from the top of the unit. (ie. tile, slate, etc.)