Install Instructions (Venting)

29
3.0 Category IV Installation of Vent/Air Piping
3
.2.4 Category IV - Multiple Boiler Installation -
Sidewall
1. On installations of multiple PRESTIGE boilers, ter-
minate each vent pipe as described in this manual.
2. The wall penetration of the vent should be a mini-
mum 12” [30.5 cm] from the adjacent vent pipe of
another boiler for installations in the U.S as shown
Fig. 19. For installations in Canada, provide clear-
ances as required by CAN/CSA B149.1.
Fig. 19 shows one option for vent terminations of
multiple PRESTIGE boilers. Any vent termination
option shown in Figs. 17 & 18 on page 28 can be
used for multiple PRESTIGE boilers. The 12” [30.5
cm] minimum distance between centerlines of the
vent piping must be maintained for any chosen
option.
Reference Figs. 17 & 18 on page 28 for the configu-
ration dimensions of the vent for each unit installed
in a multiple installation.
NOTICE
NOTICE
3
.2.2 Category IV - Vent Installation - Sidewall
1. Vent Penetration
- Vent pipe penetration through combustible or
non-combustible wall material should maintain a
minimum 1/4” [6 mm] 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
the vent manufacture’s installation instructions,
supplied with the vent for clearances.
2. The installer must use a galvanized metal thimble for
the vent pipe penetration.
3. Locate the vent pipe penetration to provide minimum
clearances as described in Figs. 17 & 18 on page
28.
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 penetrations with an exterior silicon caulk.
3.2.3 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 piping must terminate at the boil-
er with a 90º elbow.
3. The vent pipe can terminate:
- Using a coupling as shown in Fig. 17 on page 28.
- Using a 90º elbow as shown in Fig. 18 on page 28.
The vent termination must be installed 12” [30.5 cm] min-
imum above grade / highest anticipated snow level.
Do not extend the vent pipe outside the sidewall
beyond the dimensions shown in Figs. 17 & 18 on
page 28. Extended exposure of the vent pipe could
cause condensate to freeze and block the vent pipe.
WARNING
1
2
"
[
3
0
.
5
c
m
]
M
i
n
.
A
b
o
v
e
G
r
a
d
e
/
H
i
g
h
e
s
t
A
n
t
i
c
i
p
a
t
e
d
S
n
o
w
L
e
v
e
l
Vent
Termination
1
2
"
M
i
n
.
[
3
0
.
5
c
m
]
3
6
"
M
a
x
.
[
9
1
.
4
c
m
]
1
2
"
M
i
n
.
-
2
4
”
M
a
x
.
[
3
0
.
5
c
m
-
6
1
c
m
]
T
o
W
a
l
l
T
y
p
.
Category IV - Sidewall Vent Terminations
of Multiple Boilers
Fig. 19: