Regency P48-NG2 Owners & Installation Manual

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Regency P48-NG2 Owners & Installation Manual Manual pdf 25 page image

Regency ® P48-2 Zero Clearance Direct Vent Gas Fireplace24INSTALLATION6) Continue to assemble pipe lengths.Note: If an offset is necessary in the atticto avoid obstructions, it is importantto support the vent pipe every 3feet (0.9 meter), to avoid excessivestress on the elbows, and possibleseparation. Wall straps are availablefor this purpose(Diagram 2).Galvanized pipe is desirable above the rooflinedue to its higher corrosion resistance. Continueto add pipe sections through the flashing untilthe height of the vent cap meets the minimumheight requirements specified in Diagram 5 orlocal codes. Note that for steep roof pitches,the vertical height must be increased.Diagram 3NOTE:For best results and optimum performancewith each approved venting system, it ishighly recommended to apply “Mill-Pac”sealant (supplied) to every inner pipe connec-tion. Failure to do so may result in draftingor performance issues not covered underwarranty. Silicone (red RTV) is optional.UNIT INSTALLATIONWITH VERTICALTERMINATION1) Maintain the 1-1/4"(32mm) clearances(air spaces) t oc o m b u s t i b l e s w h e npassing through ceilings,walls, roofs, enclosures,attic rafter, or othernearby combustiblesurfaces. Do not pack airspaces with insulation.Check "VentingArrangemnt - VerticalTermination" section forthe maximum verticalrise of the ventingsystem and themaximum horizontaloffset limitations.2) Set the gas appliancein its desired location.Drop a plumb bob down from the ceilingto the position of the appliance flue exit,and mark the location where the vent willpenetrate the ceiling. Drill a small hole at hispoint. Next, drop a plumb bob from the roofto the hole previously drilled in the ceiling,and mark the spot where the ventwill penetrate the r o o f .Determine if ceilingjoists, roof raftersor other framing willobstruct the ventingsystem. You maywish to relocatet h e a p p l i a n c eor to offset, asshown in Diagram2 to avoid cuttingl o a d b e a r i n gmembers.3) A Firestop spacer must be installed in thefloor or ceiling of every level. To install theFirestop spacer in a flat ceiling or wall, cuta 11 inch (279mm) square hole. Frame thehole as shown in Diagram 3 and install thefirestop.4) Assemble the desired lengths of pipe andelbows. Ensure that all pipes and elbowconnections are in the fully twist-lockedposition and sealed.Diagram 4: The upper half of the flashing isinstalled under the roofing material and notnailed down until the chimney is installed.This allows for small adjustments.5) Cut a hole in the roof centered on the smalldrilled hole placed in the roof in Step 2. Thehole should be of sufficient size to meetthe minimum requirements for clearanceto combustibles of 1-1/4"(32mm). Slip theflashing under the shingles (shingles shouldoverlap half the flashing) as per Diagram 4.A poor draft, or down drafting can result fromhigh wind conditions near big trees or adjoiningroof lines, in these cases, increasing the ventheight may solve the problem.7) Ensure vent is vertical and secure the baseof the flashing to the roof with roofing rails,slide storm collar over the pipe section andseal with a mastic.8) Install the vertical termination cap by twist-locking it.Note: Any closets or storage spaces, whichthe vent passes through must beenclosed.Diagram 5Diagram 1Roof PitchMinimum VentHeightFeet Metersflat to 7/12 2 0.61over 7/12 to 8/12 2 0.61over 8/12 to 9/12 2 0.61over 9/12 to 10/12 2.5 0.76over 10/12 to 11/12 3.25 0.99over 11/12 to 12/12 4 1.22over 12/12 to 14/12 5 1.52over 14/12 to 16/12 6 1.83over 16/12 to 18/12 7 2.13over 18/12 to 20/12 7.5 2.29over 20/12 to 21/12 8 2.44Diagram 2