19
4. The combustion air and vent pipe center lines must
be a minimum of 12” [30.5 cm] apart as shown in
Figs. 8 through 15 pages 17 & 18.
5. The following should be considered when determin-
ing the location of the vent and combustion air ter-
mination:
a. Locate the vent termination where flue vapors
will not damage surrounding shrubs, plants, air
conditioning equipment or be objectionable to
the homeowner.
b. The flue products will form a noticeable plume
of water vapor as they condense in colder air.
Avoid terminating the vent in areas where the
plume could obstruct window views.
c. Prevailing winds could cause freezing of flue
gas condensation and a buildup of water / ice on
surrounding plants, building surfaces or com-
bustion air inlet.
d. Avoid locations where prevailing winds could
affect the performance of the boiler or cause
recirculation of the flue gases, such as inside
corners of buildings, near adjacent buildings,
vertical surfaces, window wells, stairwells,
alcoves, courtyards, or other recessed areas.
e. Do not terminate the vent above doors or win-
dows: flue condensate could freeze causing ice
formations.
f. Locate the vent termination to prevent possible
condensate damage to exterior finishes.
g. Avoid locations of possible accidental contact of
flue vapors with people or pets.
6. The vent termination must also maintain the follow-
ing clearances; as shown in Fig.3, page 13.
a. At least 3 feet [0.9 m] from adjacent walls
b. At least 3 feet [0.9 m] below roof overhangs
c. At least 7 feet [2.1 m] above any public walk-
ways
d. At least 3 feet [0.9 m] above any forced air intake
within 10 feet [3 m] (does not apply to the com-
bustion air inlet of a direct vent appliance).
e. No closer than 12” [30.5 cm] below or horizon-
tally from any door, window or gravity air inlet.
f. Must be at least 4 feet [1.2 cm] from electric
meters, gas meters-regulators, relief valves or
other equipment. Never terminate the vent
above or below any of these items or within 4
feet [1.2 cm] horizontally.
g. A minimum of 12” [30.5 cm] or a maximum of 24”
[61 cm] beyond the exterior wall.
h. A minimum 12 inches [30.5 cm] horizontal spac-
ing from other fan assisted appliance vents (see
page 13).
7. The edge of the combustion air termination coupling
must extend 1” [2.5 cm] beyond the exterior wall as
shown in Figs. 8 through 15 pages 17 & 18.
8. Locate the vent and combustion air terminations in
a manner so as to protect from damage by foreign
objects, such as stones, balls, buildup of leaves or
sediment.
9. Do not connect any other appliance to the vent pipe
or multiple boilers to a common vent pipe.
Direct Vent Installation of Vent/Air Piping
Содержание Prestige CPVC
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