Assessments - 2, GPA: 4.5
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Example: If the vertical dimension from the floor of the unit is 7’ (2.14m), the horizontal run to the face of the outer wall must not exceed 8Z\x' (2.6 m). Sidewall Vent Graph showing the relationship between vertical and horizontal dimensions for a Direct Vent flue system. Horizontal Dimension From the Outside Face of the Wall to the Center of the Fireplace Vent Flange Figure 15 - Rear Wall Venting Graph Venting installation Rear Wall Vent installation When installed as a rear vent unit this appliance may be vented directly to a termination located on the rear wall behind the appliance • The maximum horizontal distance between the rear of the appliance and the outside face of the rear wall is 20" (508 m). Figure 16 • Only one 45° elbow is allowed in these installations. DVR584-600Rear vent no elbows2/99 djt 9Z\x" (241 mm) FP1954wall framing Top View Flat Installation 20" (508 mm) 11Z\x" (292 mm) Figure 16 - Rear Vent Application, Maximum Horizontal Distance 1. Locate and cut the vent opening in the wall. For combustible walls first frame in opening. Combustible Walls: Cut a 11Z\x"H x 9Z\x" W (292 x 241 mm) hole through the exterior wall and frame as shown. Figure 17 Noncombustible Walls: Hole opening should be 7Z\x" (190 mm) in diameter. 2. Rigid vent pipes and fittings have special twist-lock connections. Assemble the desired combination of pipe and elbows to the appliance adaptor with pipe seams oriented towards the wall or floor. Twist-lock Procedure: The female ends of the pipes and fittings have three locking lugs (indentations). These lugs will slide straight into matching slots on the male end of adjacent pipes and fittings. Push the pipe sections together and twist one section clockwise approximately one-quarter turn until the sections are fully locked. Figure 18 3. Attach vent pipe assembly to the fireplace. Set fireplace in front of its permanent location to insure minimum clearances. Mark the wall for a 11Z\x"H x 9Z\x"W (292 x 241 mm) rectangle hole (for noncombustible material such as masonry block or concrete, a 7Z\x" [190 mm] diameter hole is acceptable). Figure 17. The center of the hole should line up with the center line of the horizontal rigid vent pipe end. Be sure to allow for minimum rise. Cut a 11Z\x"x9Z\x" rectangle hole through combustible exterior wall (7Z\x" diameter hole if noncombustible). Frame as necessary. Allow 1/4" minimum rise per foot. Figure 17 7Z\x" (190 mm) FP1954 Figure 17 - Vent Opening Requirements FP1953rigid pipe Female Locking Lugs Note: Horizontal runs of vent must be supported every three (3) feet (914 mm). Use wall straps for this purpose. Male Slots FP1953 Figure 18 - Rigid Vent Pipe Connections 4. Apply a bead of non-hardening mastic around the outside edge of vent cap. Position the vent cap in the center of hole on the exterior wall with the word “UP” on the vent cap facing up. Insure proper clearance of 1" to combustibles is maintained. Attach the vent cap with four wood screws supplied. Figure 19 NOTE: Replace the wood screws with appropriate fasteners for stucco, brick, concrete, or other types of siding. For vinyl siding, stucco, or wood exterior use vinyl siding standoffs between vent cap and exterior wall. The vinyl siding standoff prevents excessive heat from melting the vinyl siding material. Bolt the vent cap to the standoff. Apply non-hardening mastic around outside edge of the standoff instead of the vent cap assembly. Use wood screws provided to attach the standoff. Figure 20 5. Slide fire stop over the vent pipe before connecting horizontal run to vent cap. Figure 21 6. Insert vent pipe into the horizontal termination. The pipe overlap should be a minimum of 1Z\v". Fasten all vent connections with screws provided. 7. Slide fire stop against the interior wall surface and attach with screws. Figure 21 ventING installation Rear Wall Vent installation (continued) HOTFP1955horizontal vent cap Deflecting Shield Vent Cap FP1955 Apply Mastic to All Four Sides Wood Screw Figure 19 - Installing Horizontal Vent Cap WARNING Do not recess vent termination into any wall. This will cause a fire hazard. Cut Vinyl Siding Away to Fit Standoff HOTFP1956vinyl siding standoff Deflecting Shield Standoff FP1957install firestop Interior Wall Surface Vent Cap Apply Mastic to All Four Sides Vent Cap (Horizontal Termination) FP1956 Bolt Nut Wood Screw Figure 20 - Installing Vinyl Siding Standoff FP1957 Horizontal Vent Pipe Screw Figure 21 - Connecting Vent Cap with Horizontal Vent Pipe ventING installation Horizontal termination configurations Since it is very important that the venting system maintain its balance between the combustion air intake and the flue gas exhaust, certain limitations as to vent configurations apply and must be strictly adhered to. The Vent Graph, showing the relationship between vertical and horizontal side wall venting, will help to determine the various dimensions allowable. Figure 22 Minimum clearance between vent pipes and combustible mater...
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