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Optional High Wind Termination Cap Secure Flashing with Non-Hardening Sealant and Roofing Nails Figure 5.15 Step 9. Twist-lock the vent cap and seal. Note: For multi-story vertical installations, a ceiling firestop is required at the second floor, and any subsequent floors (Figure 5.16). The opening should be framed to 10 in. x 10 in. (254mm x 254mm) inside dimensions, in the same manner as shown in Figure 5.13 on page 16. MIN. 1 in. (25mm) CLEARANCE CEILING FIRES TOP NAILS MIN. 1 in. (25mm) CLEARANCE MIN. 1 in. (25mm) CLEARANCE MIN. 1 in. (25mm) CLEARANCE Figure 5.16 WARNING • Fire Risk. Explosion Risk. Any occupied areas above the first floor, including closets and storage spaces, which the vertical vent passed through must be enclosed. The enclosure may be framed and sheetrocked with standard construction materials; however, refer to these installation instructions for the minimum allowable clearance between the outside of the vent pipe and the combustible surfaces of the enclosure. Do not fill any of the required air space with insulation. August 1, 2008 Heat & Glo · Tiara Petite B · 7026-101K Page 17 2. Cathedral Ceiling Step 1. Follow installation Steps 1 and 2 under vertical installation section, page 15. Step 2. Remove shingles or other roof covering as necessary to cut the rectangular hole for the support box. Cut the hole 1/8 in. (3mm) larger than the support box outline. Step 3. Lower the support box through the hole in the roof until the bottom of the support box protrudes at least 2 in. (51mm) below the ceiling (Figure 5.17). Align the support box both vertically and horizontally with a level. Temporarily tack the support box in place through the inside walls and into the roof sheathing. Level Cathedral Ceiling Support Box 2 in. (51mm) Min. below finished ceiling Cut hole 1/8 in. (3mm) greater in size than pattern of support box as it is projected onto roof line Figure 5.17 Step 4. Using tin snips, cut the support box from the top corners down to the roofline, and fold the resulting flaps over the roof sheathing (Figure 5.18). Before nailing it to the roof, run a bead of non-hardening mastic around the top edges of the support box to make a seal between it and the roof. Clean out any combustible material from inside the support box. Step 5. Assemble the desired lengths of pipe and elbows necessary to reach from the appliance up through the round support box. Ensure that all pipe and elbow connections are in their fully twist-locked position. Assemble as instructed. Figure 5.18 Step 6. Place the support clamp (provided with the support box) inside the support box (at the bottom), and secure to the pipe section. The clamp allows the support box to support the weight of the pipe sections. Continue to add pipe sections until you are above the roofline. Step 7. Complete the cathedral ceiling installation by following the same procedures outlined in steps 7 through 9 for vertical installations, pages 16-17. Step 8. Install the black trim collar around the outside of the cathedral ceiling support box (Figure 5.19). The two pieces of the trim collar slide over one another to allow for easy adjustment around the support box. Using the six screws provided, secure the four corners and the overlapping sections of the trim collar to the ceiling. You may want to predrill the holes for the overlapped sections for ease of installation. Trim Collar Screws Cathedral CeilingSupport Box Figure 5.19 Page 18 Heat & Glo · Tiara Petite B · 7026-101K August 1, 2008 August 1, 2008 Heat & Glo · Tiara Petite B · 7026-101K Page 19 3. Class A Metal Chimney Figure 5.20 TERMINATION CAP EXISTING METAL CHIMNEY SYSTEM TOP ADAPTOR FLASHING 4 in. (102mm) FLEX PIPE RETRO CONNECTOR DIRECT VENT PIPE High Wind Termination Cap Sheet Metal Screws Drill Four 1/8 in. (3mm) Diamater Holes Figure 5.22 Figure 5.23 Step 4. Pass the flex pipe down through the center of the chimney system, and center the top adapter on the top of the chimney pipe. Drill four 1/8 in. (3mm) diameter holes through the top adapter, and into the chimney top. Ensure that you are drilling into the metal on the chimney. Twist lock the high wind termination cap onto the top adapter (Figures 5.22 and 5.23). Step 5. Pull the flex pipe down through the ceiling support box, until it protrudes approximately 3 in. (76mm). Connect the flex pipe to the retro connector, and attach with sheet metal screws. Step 6. Push the flex pipe back up into the ceiling support box, center the retro connector, and attach it to the support box with sheet metal screws. Step 7. The connection between the appliance and the retro connector may be completed with sections of direct vent pipe. Top Adapter Sheet Metal Screws Flex Pipe Figure 5.21 Step 1. Remove existing chimney cap. Step 2. Measure the distance from the top of the chimney to the bottom of the ceiling support box, add 3 in. (76mm) to this measurement, and cut a section of 4 in. (101mm) flex pipe to that length (the flex should be fully...
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