Empire Comfort Systems DVP42FP30N-4, Инструкция по установке и руководство пользователя, Страница: 32 / 80

31455-10-1115 Page 32
VERTICAL TERMINATION
Locate and mark the center point of the venting pipe. Using a nail
on the underside of the roof and drive this nail through this center
point. Make the outline of the roof hole around this center point.
NOTE: Size of the roof hole dimensions depend on the pitch of
the roof. There must be a 1 inch clearance (25mm) to the
vertical pipe sections. This clearance is to all combustible
material.
Cover the opening of the vent pipe and cut and frame the roof hole.
Use framing lumber the same size as the roof rafters and install the
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seal. Non-hardening sealant should be used to completely seal this
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Determining Minimum Vent Height Above the Roof.
WARNING: Major U.S. building codes specify minimum
chimney and/or vent height above the roof top. These mini-
mum heights are necessary in the interest of safety. These
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Flat to 6/12 12" (305 mm)
6/12 to 7/12 15" (381 mm)
Over 7/12 to 8/12 18" (457 mm)
Over 8/12 to 16/12 24" (610 mm)
Over 16/12 to 21/12 36" (914 mm)
Figure 54
Note that for steep roof pitches, the vent height must be increased.
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pitched roofs, and other similar factors can result in poor draft, or
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this problem.
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Figure 55 .
Figure 55
General Maintenance
Conduct an inspection of the venting system semi-annually.
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or streaks and, in extreme cases, holes. These components
should immediately be replaced.
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any bird nests or other foreign material.
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droplets forming in the inner liner and subsequently dripping
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disturbed and, consequently, loosened. Also, check mechanical
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A removable panel or other means must be provided in the enclosure
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NOTE: This also pertains to vertical vent systems installed on the
outside of the building.
Slide the vertical vent cap over the ends of the vent pipe and secure.
See Figure 56.