Desa VK42N SERIES Owner's Operation And Installation Manual

Also see for K42N SERIES: OWNER'S OPERATION AND INSTALLATION MANUAL OWNER'S OPERATION AND INSTALLATION MANUAL

111921-01AFor more information, visit www.desatech.comFor more information, visit www.desatech.com1313INSTALLATION FOR VERTICAL TERMINATIONNote: Vertical restrictor must be installed in all vertical installations.1. Determine the route your vertical venting will take. If ceilingjoists, roof rafters, or other framing will obstruct the ventingsystem, consider an offset (see Figure 19) to avoid cutting loadbearing members.Note: Pay special attention to these instal-lation instructions for required clearances (air space) to com-bustibles when passing through ceilings, walls, roofs, enclo-sures, attic rafters, etc. Do not pack air spaces with insulation.Also note maximum vertical rise of the venting system andany maximum horizontal offset limitations.2. Set the fireplace in desired location. Drop a plumb line downfrom the ceiling to the position of the fireplace exit flue. Markthe center point where the vent will penetrate the ceiling. Drilla small locating hole at this point.Drop a plumb line from the inside of the roof to the locatinghole in the ceiling. Mark the center point where the vent willpenetrate the roof. Drill a small locating hole at this point.VENTING INSTALLATIONINSTRUCTIONSContinuedFlat Ceiling Installation1. Cut a 10 3/4" square hole in the ceiling using the locating hole asa center point. The opening should be framed to 10 3 /4"x10 3 /4"(273mm x 273mm) inside dimensions, as shown in Figure 9 onpage 8 using framing lumber the same size as the ceiling joists.If the area above the ceiling is an insulated ceiling or a room,nail firestop from the top side. This prevents loose insulationfrom falling into the required clearance space. Otherwise, in-stall firestop below the framed hole. The firestop should be in-stalled with no less than three nails per side (see Figure 20).Figure 19 - Offset with Wall Strap and 45°ElbowsFigure 20 - Installing FirestopIf area above is not a room, installfirestop below framed hole.If area above is a room, installfirestop above framed hole.2. Assemble the desired lengths of pipe and elbows necessary toreach from the fireplace flue up through the firestop. Be sureall pipe and elbow connections are fully twist-locked (see Fig-ure 8, page 8).3. Cut a hole in the roof using the locating hole as a center point.(Cover any exposed open vent pipes before cutting hole in roof.)The 10 3/4"x10 3/4" hole must be measured on the horizontal;actual length may be larger depending on the pitch of the roof.There must be a 1" clearance from the vent pipe to combustiblematerials. Frame the opening as shown in Figure 9, page 8.4. Connect a section of pipe and extend up through the hole.Note: If an offset is needed to avoid obstructions, you mustsupport the vent pipe every 3 feet. Use wall straps for thispurpose (see Figure 19). Whenever possible, use 45° elbowsinstead of 90° elbows. The 45° elbow offers less restriction tothe flow of the flue gases and intake air.5. Place the flashing over the pipe section(s) extending throughthe roof. Secure the base of the flashing to the roof and fram-ing with roofing nails. Be sure roofing material overlaps thetop edge of the flashing as shown in Figure 19. There must bea 1" clearance from the vent pipe to combustible materials.6. Continue to add pipe sections until the height of the vent capmeets the minimum building code requirements described inFigure 7 on page 6.Note: You must increase vent height forsteep roof pitches. Nearby trees, adjoining rooflines, steeppitched roofs, and other similar factors may cause poor draftor down-drafting in high winds. Increasing the vent height maysolve this problem.7. Twist-lock the vent cap onto the last section of vent pipe.Note: If the vent pipe passes through any occupied areas above the firstfloor, including storage spaces and closets, you must enclose pipe. Youmay frame and sheetrock the enclosure with standard constructionmaterial. Make sure and meet the minimum allowable clearances tocombustibles. Do not fill any of the required air spaces with insulation.VENTING INSTALLATION INSTRUCTIONSInstallation for Vertical Termination45° ElbowWall StrapRoof FlashingCeiling Firestop