Vent Diagrams - Majestic Quartz Series Installation Manual

F. Vent Diagrams
General Rules:
• When penetrating a combustible wall, a wall shield
firestop must be installed.
• When penetrating a combustible ceiling, a ceiling firestop
must be installed.
• Horizontal runs of vent do not require vertical rise;
horizontal runs may be level.
• It is recommended that the horizontal termination cap
have a 1/4 inch downward slant to allow any moisture
in cap to be released. See Figure 4.9.
If venting configuration differs from the vent diagrams on
the following pages (Figure 4.12-4.26), these rules also
apply:
• SUBTRACT 3 ft from the total H measurement for
each 90º elbow installed horizontally.
• SUBTRACT 1-1/2 ft from the total H measurement
for each 45º elbow installed horizontally.
• A maximum of three 90º elbows (or six 45º elbows)
may be used in any vent configuration. Some elbows
may be installed horizontally. See Figure 4.13.
• Elbows may be placed back to back anywhere in
the system.
•
Any 90º elbow may be replaced with two back to
back 45º elbows.
1/4 in. max.
(6 mm)
Figure 4.9
Majestic • QUARTZPLA36IN / QUARTZPLA36IL Installation Manual • 2643-980 Rev. B • 7/22
Measuring Standards:
Vertical and horizontal measurements listed in the vent
diagrams and clearances for termination were made
using the following standards:
• Pipe measurements are shown using the effective length
of pipe. See Section 12.A (Figure 12.1 for DVP, Figure
12.9 for SLP) for information on effective length of pipe
components.
• Horizontal terminations are measured to the outside
mounting surface (flange of termination
Figure 4.10.
• Vertical terminations are measured to top of last section
of pipe. See Figure 4.11.
• Horizontal pipe installed level with no rise.
Figure 4.10 Measure to Outside Mounting Surface
Figure 4.11 Measure to Top of Last Section of Pipe
cap).
MEASURE TO SHADED SURFACE
(OUTSIDE MOUNTING SURFACE)
See
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