Install Instructions (Venting)

18
c
. Prevailing winds could cause freezing of flue
gas condensation and a buildup of water / ice on
s
urrounding plants, building surfaces or com-
bustion air inlet.
d. Avoid locations where prevailing winds could
affect the performance of the boiler or cause
r
ecirculation 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. 2 on page 15.
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. 6 through 8 on page 19.
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.
2
.2.2 Direct Vent - Vent Installation - Sidewall
1. Vent and Combustion Air Penetration
- Vent pipe penetration through combustible or
non-combustible wall material should maintain a
minimum 1/4” [6mm] clearance for 3” and 4”
PVC/CPVC vents or 1” for 2” PVC/CPVC Vents.
The diameter of the penetration hole should be
4” [10.2 cm] minimum for 2” and 3” pipe or 5”
[12.7 cm] minimum for 4” pipe. When using
Polypropylene or Stainless Steel vent refer to
vent manufacture’s installation instructions, sup-
plied with the vent for clearances.
- Combustion air pipe penetration can maintain
zero clearance. The diameter of the penetration
hole should be 2-3/8” [6 cm] minimum for 2” pipe
or 3-1/2” [8.9 cm] minimum for 3” pipe or 4-1/2”
[11.4 cm] minimum for 4” pipe.
2. The installer must use a galvanized metal thimble for
the vent pipe penetration.
3. Locate the vent and combustion air pipe penetra-
tions to provide clearances as described in Figs. 6
through 8 on page 19.
4. The installer must comply with all local codes for iso-
lating the vent pipe as it passes through floors and
walls.
5. The installer should seal all exterior openings
around penetration with an exterior silicon caulk.
2.2.3 Termination Fittings - Sidewall
1. The vent and combustion air terminations must
include a factory supplied “bird screen” installed as
shown in Figs. 9 & 10 on page 20.
2. The combustion air pipe must terminate using a 90º
elbow as shown in Figs. 6 through 8 on page 19.
3. The vent pipe can terminate:
- Using a 90º elbow as shown in Fig. 6 on page 19.
- Using coupling as shown in Fig. 8 on page 19.
The vent termination must be installed 12” [30.5 cm]
minimum above grade / highest anticipated snow level.
Do not extend the vent pipe outside the sidewall
beyond the dimensions shown in Figs. 6 through 8
on page 19. Extended exposure of the vent pipe
could cause condensate to freeze and block the vent
pipe.
WARNING
2.0 Direct Vent Installation of Vent/Air Piping