Install Instructions
CG
i
GAS-FIRED
wATER
BOILER-
sERIEs
a-
Boiler
Manual
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8
Prepare boiler location - vent system
Failure to follow all instructions can result
in
flue gas spillage
and
carbon
mon
oxide emissions, causing severe
personal inj
ur
y or death.
Inspect existing chimney before installing boiler. Failure to clean
or
rep
la
ce perforated pipe
or
tile lining will cause
severe
pe
rson
al
injury
or
dea
th.
Direct
exhaust
venting (Category
Ill)
-
DO
NOT COMMON vent the CGi
in
a direct exhaust system
(Ci
te
gory
Ill
).
COJ
mecting more than
one
ap
pliance
to
a direct exhaust system will cause flue
gas
spillage or appliance
malfunction, resulting in possible severe personal injury, death
or
substantial property da
ma
ge.
When removing
boiler
from
an
existing common
vent
system:
At the
time
of
removal
of
an existing boiler, the following
steps shall
be followed with each appliance remaining con-
nected to the common venting system placed in operation,
while
the
other
appliances remaining connected to
the
comm
on
ve
ntin
g
syste
m
are
not
in
operatio
n.
a.
Seal
any
unused
openings
in
the
co
mm
on
ve
nting
system.
b. VIsually
Inspect
the
venting
system
for proper size
and
horizontal pitch
and
determine there
is
no blockage
or restrictio
n,
leakage, co
rr
osion
or
other de
fi
ciencies
which cou
ld
cause
an
unsafe condition.
c.
Test
vent
system
- Insofar
as
is
(>
Tactical,
dose
all
building
doo
rs
and
windows
and
all
doors
between
the space in wh
ic
h the appliances remaining connected
to the co
mm
on venting system are located
and
other
spaces
of
the building.
Turn
on
clothes dryers
and
any
appl
ia
nce n
ot
connected to
the
common
ve
nting system.
Turn
on any exhau
st
funs,
such
as
range hoods
and
bathroom exhausts, so they will operate at maxi
mum
speed.
Do
not operate a stmmt
er
exhaust
fun.
Close
firep
lace
dampers.
d.
Place
In
operation
the
appliance
being
inspected.
Follow
the
operating instructions.
Adj
u
st
the
m1
ostat
so
app
lian
ce
will oper
ate
continu
ous
l
y.
e.
Test
for
spillage
at
draft
hood
re
li
ef
opening after 5
minutes
of
main
burner operation.
Us
e the flame
of
a
match or candle.
f.
After
it
has been determined
that
each
appliance
re
mai
n
in
g
con
nected
to
the common ven
ting
syste
m
properly vents when tested as outlin
ed
above, r
et
urn
doors, windows, exhaust funs, firepla
ce
dampers,
and
any other gas-burning appliance
to
their previous con-
ditions
of
use.
Any
improper operation
of
comm
on
ve
nting system
sho
uld
be co
rr
ected
so
th
e installation confomts with the National
Fuel Gas
Code, ANSI Z22
3.
1 - latest edition. Correct by
resizing
to
approach the minimum size as determined
using the appropriate tables
in
Part I I
of
that code.
Ca
-
nadian installations
must
comply with BI49.1 or BI49
.2
Installation Code.
Chimney
or
vent
requirements
1.
Venting must
be
installed according to Part 7,
Venting
of
Equipment, of National
FU
el Gas
Code,
ANSI Z223.1 - latest e
dition
and
ap
-
plicab
le
building codes. Canadian installations
must
comply with BI49.1
or
BI49.2 Installation
Codes.
2.
See
Ratings table
on
pa
ge
66 for minintwn chim-
ney
or
vent sizes. A chi
mn
ey or vent without a
listed
cap
sho
u
ld
extend
at
least
3 feet
above
the
highest
point where
it
passes through a r
oof
of
a building
and
at
least
2 teet
higher
than
any
portion
of
a building within a
ho
rizontal
distance
of
10
teet. A chimney or vent
mu
st
not
extend less than the distances stated above.
3. A lined chi
mney
is preferred
and
must
be
used
when requir
ed
by local, state, pr
ov
incial
and
national codes, laws, regulations
and
ordinances.
Vitreous tile linings
with
joints
that
prevent
retention
of
moisture and
Ji
ni
ngs
m
ade
of
non-
corrosi
ve
materials are best.Advice for flue con-
nections
and
chi
mn
ey linings can
be
obta
in
ed
fro
m local gas utility. Type B double-wall metal
ve
nt pipe or
si
ngle-wall
ve
nt pipe may be used
as
a lin
er.
4. Cold masonry c
himn
eys, also known as outside
chimneys, typically have one
or
more walls ex-
posed to outside air. When any atmospheric gas-
fired boiler with automatic vent damp
er
is vented
t
hrough
this
type
of
chimney, the potential
exists
fo
r condensation to occur. Condensation
can damage a masonry chim
ney.
Weil
-Mclain
recommends the following to prevent possible
damage.
a.
Line
c
himn
ey
wi
th
co
rr
osi
on
-
resistant
m
eta
l
li
ner
suc
h as AL29-4CS single-wall
stainless steel orB-vent.
Size liner per
National Fuel Gas Code
ANS
I
Z223.1
-
latest edition.
b.
Provide drain
trap
to remove any conden-
sate.
Part Number 550-142-780/0712