Install Instructions
CG i
GAS-FIRED
wATER
BOILER-
sERIEs
3-
Boiler
Manual
13b
Ratings
LSJ
~I.IDI
.,..
•••II
CERTIFIED,.
c
H
Table
11
Bo
iler ratings
Boiler
model
number
(Note
1)
CGi-25
CGi-3
(Note
5)
CGi-4
(
Not
e 5)
CGi-5
CGi-6
CGi-7
CGi-6
Notes
NO
TI
CE
DOE
Net
AHR
I
Boiler
DOE
Heating
0 - 2,000
feet
2,000 - 4,500
feet
ratings
water
Seasonal
Vent
size
capacity
altitude altitude
(Btuh)
content
e1Ticlency
(Btu
h)
(gallons)
(%AFUE)
(Note
21
Input
Output
Input
Output
(Note
3J
(Note5)
(Note4)
(Btuh)
(Btuh)
(Btuh
) (Btuh)
42,000
50,000
42,000 45,000 38,000 37,000
1.5 84.0 3"
51,000
60,000 51,000
60,000 51
,000
45,000
1.5
85.1
3"
76,000
90,000
76,000 81,000
68,400 66,000
2.1 85.0
3"
100,000 119,000 100,000
120,000
10
1,000 87,000 2.7 83.3
3"
140,000
167,000 140,000
150,000
126,000 122,000
3.3 83.3
3"
167,000 200,000 167,000
180,000
150,000 145,000
3.8
83.0
3"
194,000
233,000 194,000
210,000
175,000 169,000
4.4
82.7
3"
1 .
Add
"PIN"
for
na
tur
al gas boiler -
"PIL"
for
Liquefied Petroleum (propane) gas boiler.
2. Based on standard t
est
procedur
es
pr
esc
rib
ed
by
the
Un
i
ted
States Department
of
En
ergy.
3. Net
AHRI ratings are based on net Installed radiation
of
sufficient quantity
for
the
requirements
of
the
building and nothing
need
be
added
fo
r normal piping and pickup. Ratings are based
on
a
pip-
ing and
pickup
allowance
of
1.15.
An
additional allowan
ce
should
be
made
fo
r unus
ua
l piping and
pick
up
loads.
4. CGi boilers require special venting, consistent w
it
h Category I
or
Ill boiler. Use only the vent materials
a
nd
met
hod
s
spec
ified In this manual. Vent
diameter
sh
ow
n a
bo
ve
Is
for
dire
ct
exhaust
ve
nting. See
Table
3,
page
14, f
or
vent diameter when chimney
draft
venting.
5. As
an
Energy Star
Partner,
Well
-M
cla
in
has detennlned
tha
t
the
CGI-3 & 4 meets
the
Energy Star guidelines for
energy
efficiency.
CGi
boilers
for
residential radiant panel
systems,
converted gravity heating
syste
ms or
ot
her l
ow
water
tempera-
ture applications should
be
installed with balancing
valves
and
bypass
piping equal to the supply and return
size
to
avoid
excessive
flue
gas
condensation
due
to l
ower
operating
water
temperatures.
For
alternate piping,
co
ntact
your
Weil
-M
cLain
sa
l
es
office.
CSA
design certified
for
installation on combustible flooring. Tested for
50
psi
work
i
ng
p
ressure.
Pa
rt
Nu
mbe
r 550-142-780/0712
69