Instruction manual

Part number 550-142-056/0411
GWC gas-fired water boiler — Boiler Manual
38
DIRECT VENT — Sidewall with separate pipes (continued)
For multiple boiler applications using the manifolded
c
ombustion
air o
ption,
the v
ent
can b
e
t
erminated
in
an e
lbow
as in Figur
e
43
,
pag
e
37
,
o
r
in a c
oupling
o
r
sid
ewall
t
ermination
plat
e.
T
he
v
ents
m
ust
b
e
lo
cated
f
ollowing
the r
estrictions
in Figur
e
41
,
pag
e
35
and
Figur
e 38, page 31.
In addition to the vent materials, this installation requires
t
wo
(
2)
W
-T
s
idewall
t
ermination
p
lates
a
nd
a b
ird
s
creen
f
or
e
ach
a
ir
a
nd
v
ent
t
ermination
fi
tting,
u
nless
u
sing
a
n
A
L29-4C
v
ent
t
ermination
fi
tting
w
ith
i
ntegral
s
creen.
T
wo
p
lates
a
nd
t
wo
b
ird
s
creens
a
re
s
upplied
w
ith
t
he
b
oiler.
Prepare wall penetrations
1. Two W-T sidewall termination plates are included with each boiler.
U
se
o
ne
o
f
the sid
ewall
t
ermination
plat
es
as a t
emplate
t
o
mar
k
air
pipe and vent pipe hole locations.
a. Hole centers in the plates are 3¾" apart.
b. Hole diameters are 3.14" for holes as is. Use as is for 3" AL29-4C
pipe. Remove knockout to provide 3
5
⁄8 " hole for 3" PVC pipe.
2. Air pipe penetration:
a. Cut a hole for the air pipe.
b
. Size
the air pip
e
hole as c
lose
as d
esired
t
o
the air pip
e
ou
tside
diame
ter.
3. Vent pipe penetration:
a. Cut a hole for the vent pipe.
b
. Cut
the v
ent
pip
e
hole t
o
at least 3.9 inc
hes
f
or
3" PV
C
v
ent
o
r
3.4"
for 3"
AL29-4C
vent.
c. Insert
a g
alvanized
m
etal
t
himble
i
n
t
he
v
ent
p
ipe
h
ole
a
s
sho
wn in Figure 45.
4.
Follow
a
ll
l
ocal
c
odes
f
or
i
solation
o
f
v
ent
p
ipe
w
hen
p
assing
through floors or walls.
5. Seal exterior openings thoroughly with exterior caulk.
Termination and fittings
1. Prepare the vent termination elbow and the air termination elbow
b
y
inse
rting
b
ird
scr
eens,
unless using an AL29-4C v
ent
t
ermina-
tion
fitt
ing
w
ith
int
egral
scr
een.
(S
ee
Figur
e
43
,
pag
e
37
.)
T
wo
b
ird
scr
eens are supplied with the boiler.
2. When
c
ompleted,
t
he
a
ir
te
rmination
e
lbow
o
pening
m
ust
b
e
o
riented
at least 12 inc
hes
b
elow
the v
ent
t
ermination
and at least
12 inches above grade or snow line as shown in Figure 43, page 37.
3. You
c
an
or
ient
t
he
v
ent
t
ermination
e
lbow
e
ither
d
irectly
o
ut-
ward
o
r
9
0
d
egrees
a
way
f
rom
t
he
a
ir
i
nlet
e
lbow
a
s
s
hown
i
n
Figure 43, page 37.
4. Maintain
t
he
r
equired
d
imensions
o
f
t
he
fi
nished
t
ermination
piping
as shown in Figure 43, page 37.
5. For multiple boiler terminations, see Figure 44, page 38.
6. Do
not e
xtend
e
xposed
v
ent
pip
e
ou
tside
o
f
b
uilding
mo
re
than
sho
wn
in this d
ocument.
C
ondensate
c
ould
fr
eeze
and b
lock
v
ent
pip
e.
If extending the vent and air pipes out from the wall,
instal
l
a c
oupling
o
n
ea
ch
pip
e.
M
ount
the piping w
ith
the
coupling flush with the outer plate.
Figure 44 Multiple separate pipes sidewall terminations
Figure 45 Sidewall termination assembly — using
separate pipes
1 Vent piping
2 Air piping
3 W-T sidewall termination plates, supplied
with boiler (remove knockout if using PVC
pipe; leave knockout in if using AL29-4C
vent pipe)
4 Galvanized thimbles, by installer
5 Bird screens, supplied with
boiler
6 Air inlet elbow
7 Elbow
8 Nipple
9 Elbow (vent termination)