Regency ® P48-2 Zero Clearance Direct Vent Gas Fireplace 11VENTINGINTRODUCTIONThe P48-2 uses the "balanced flue" technologyCo Axial system. The inner liner vents productsof combustion to the outside while the outerliner draws outside combustion air into thecombustion chamber thereby eliminating theneed to use heated room air for combustion andlosing warm room air 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's ownseparate vent system. Common vent systemsare prohibited.* For "C" screw position the top facing supportis reversed."C" Screw Position:For a facing material depth of 1-1/4" (32mm),the top facing support must be reversed.UNIT ASSEMBLYPRIOR TOINSTALLATIONThe Top Facing Support, the Side Nailing Stripsand the 2 Top Standoffs must be correctlypositioned and attached to the top before unitis slipped into position.TOP STANDOFF ASSEMBLYThe top standoffs are shipped in a flat positionand must be folded into shape and attached.1) Remove the standoffs from the fireplacetop.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 topwith 2 screws per standoff (on oppositecorners).TOP FACING SUPPORT ANDSIDE NAILING STRIPSDetermine the total thickness of facing material(e.g. drywall plus ceramic tiles) to allow thefinished surface to be flush with the front of theunit. Total facing thickness can vary from 1/2"(13mm) to 1-1/4" (32mm) thick.The Top Facing Support & Side Nailing Strips canbe mounted in 3 different positions dependingon the thickness of the facing material.1) Mount Top Facing Support using the 3supplied screws into the three pre-punchedscrew holes on the top front of the unit. Usehole positions A, B, or C depending on yourfacing depth.2) Use the same screw hole position for theSide Nailing Strips as was used for the TopFacing Support. Attach each side nailingstrip using 3 screws.INSTALLATIONScrewPositionFacing Material DepthA 1/2" / 13mmB 7/8" / 22mmC* 1-1/4" / 32mm