I. Disassemble Vent Sections
•Rotate either section (see Figure 10.10) so the seams on both pipe sections are aligned as shown in Figure 10.11.
•Pull carefully to separate the pieces of pipe.
Figure 10.10 Rotate Seams for Disassembly
Figure 10.11 Align and Disassemble Vent Sections
J. Cathedral Ceiling
1.Follow installation Steps 1 and 2 under vertical instal- lation section, page 16.
2.Remove shingles or other roof covering as necessary to cut the rectangular hole for the support box. Cut the hole 1/8 in. (3 mm) larger than the support box outline.
3.Lower the support box through the hole in the roof until the bottom of the support box protrudes at least 2 in. (51 mm) 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. (51 mm) MIN. BELOW FINISHED CEILING
CUT HOLE 1/8 in. (3 mm)
GREATER IN SIZE THAN
PATTERN OF SUPPORT
BOX AS IT IS PROJECTED
ONTO ROOF LINE
Figure 5.17
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
WARNING! Risk of Fire! Clean out ALL materials from inside the support box and complete the vertical vent run and termination.
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
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