Desa DVC36 Owner's Installation Instructions Manual

Contents

www.desatech.com118197-01C 13INSTALLATION FOR VERTICALTERMINATIONNote: Vertical restrictor must be installed in allvertical installations.1. Determine the route your vertical ventingwill take. If ceiling joists, roof rafters or otherframing will obstruct the venting system,consider an offset (see Figure 19) to avoid cut-ting load bearing members. Note: Pay specialattention to these installation instructions forrequired clearances (air space) to combustibleswhen passing through ceilings, walls, roofs,enclosures, attic rafters, etc. Do not pack airspaces with insulation. Also note maximumvertical rise of the venting system and anymaximum horizontal offset limitations.2. Set the fireplace in desired location. Drop aplumb line down from the ceiling to the posi-tion of the fireplace exit flue. Mark the centerpoint where the vent will penetrate the ceiling.Drill a small locating hole at this point.Drop a plumb line from the inside of the roofto the locating hole in the ceiling. Mark thecenter point where the vent will penetrate theroof. Drill a small locating hole at this point.Flat Ceiling Installation1. Cut a 10 3/4" square hole in the ceiling usingthe locating hole as a center point. The openingshould be framed to 10 3/4" x 10 3/4" (27.3 cm x27.3 cm) inside dimensions, as shown in Figure9 on page 8 using framing lumber the samesize as the ceiling joists. If the area above theceiling is an insulated ceiling or an attic space,nail firestop from the top side. This preventsloose insulation from falling into the requiredclearance space. If the area above the ceiling isa living space, install firestop below the framedhole. The firestop should be installed with noless than three nails per side (see Figure 20).2. Assemble the desired lengths of pipe andelbows necessary to reach from the fireplaceflue up through the firestop. Be sure all pipeand elbow connections are fully twist-locked(see Figure 8, page 8).3. Cut a hole in the roof using the locating holeas a center point. (Cover any exposed openvent pipes before cutting hole in roof.) The10 3/4" x 10 3/4" hole must be measured onthe horizontal; actual length may be largerdepending on the pitch of the roof. Theremust be a 1" clearance from the vent pipe tocombustible materials. Frame the opening asshown in Figure 9, page 8.4. Connect a section of pipe and extend upthrough the hole.Note: If an offset is needed to avoid obstruc-tions, you must support the vent pipe every 3feet. Use wall straps for this purpose (see Fig-ure 19). Whenever possible, use 45° elbowsinstead of 90° elbows. The 45° elbow offersless restriction to the flow of the flue gasesand intake air.VENTINg INSTALLATIONINSTRUCTIONSContinuedFigure 19 - Offset with Wall Strap and 45°Elbows4° ElbowWall StrapRoof FlashingCeiling FirestopFigure 20 - Installing FirestopIf area above is a living space, installfirestop below framed hole.If area above is an attic space or insulatedarea, install firestop above framed hole.