Allied Air A96US2V Installation Instructions Manual page 33

DIRECT VENT CONCENTRIC ROOFTOP
TERMINATION
71M80, 69M29 or 60L46 (US)
41W92 or 41W93 (Canada)
Figure 41
DIRECT VENT CONCENTRIC WALL TERMINATION
71M80, 69M29 OR 60L46 (US)
41W92 or 41W93 (Canada)
Figure 42
OPTIONAL VENT TERMINATION FOR MULTIPLE
UNIT INSTALLATION OF DIRECT
VENT WALL TERMINATION
Figure 43
507404-04
DIRECT VENT APPLICATION
USING EXISTING CHIMNEY
NOTE: Do not discharge exhaust gases directly into any chimney or
vent stack. If vertical discharge through an existing unused chimney
or stack is required, insert piping inside chimney until the pipe open
end is above top of chimney and terminates as illustrated. In any
exterior portion of chimney, the exhaust vent must be insulated.
Details of Exhaust Piping Terminations for Non-Direct
Vent Applications
Exhaust pipes may be routed either horizontally through
an outside wall or vertically through the roof. In attic or
closet installations, vertical termination through the roof is
preferred. Figures 45 through 48 show typical terminations.
1. Exhaust piping must terminate straight out or up as
shown. The termination pipe must be sized as listed
in Table 7. The specified pipe size ensures proper
velocity required to move the exhaust gases away from
the building.
2. On field supplied terminations for side wall exit, exhaust
piping may extend a maximum of 12 inches (305 mm) for
2" PVC and 20" (508 mm) for 3" (76 mm) PVC beyond
the outside wall. See Figure 46.
3. If exhaust piping must be run up a sidewall to position
above snow accumulation or other obstructions, piping
must be supported every 24" (610 mm) as shown in
Figure 47. When exhaust piping must be run up an
outside wall, any reduction in exhaust pipe size must
be done after the final elbow.
Issue 1621
Figure 44
Page 33 of 80