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CGi
SERIES 4 — GAS-FIRED WATER BOILER —
13b
Ratings
Table 11 Boiler ratings
Boiler
model
0 - 2,000 feet
number
Altitude
Input
(Note 1)
(Btuh)
CGi-25
48,000
CGi-3
58,000
CGi-4
90,000
CGi-5
119,000
100,000
CGi-6
158,000
133,000
CGi-7
190,000
160,000
CGi-8
222,000
186,000
1. Add "PIN" for Natural gas boiler - "PIL" for Liquefied Petroleum (propane) gas boiler.
2. Based on standard test procedures prescribed by the United States Department of Energy.
3. Net AHRI ratings are based on net installed radiation of sufficient quantity for the requirements
of the building and nothing need be added for normal piping and pickup. Ratings are based on
Notes
a piping and pickup allowance of 1.15. An additional allowance should be made for unusual piping
and pickup loads.
4. CGi boilers require special venting, consistent with Category I, or III boilers. Use only the vent materials
and methods specified in this manual. Vent diameter shown above is for direct exhaust venting.
See Table 3, page 14, for vent diameter when chimney draft venting.
CGi boilers for residential radiant panel systems, converted gravity heating systems or other
low water temperature applications should be installed with balancing valves and bypass pip-
ing equal to the supply and return size to avoid excessive flue gas condensation due to lower
operating water temperatures. CSA design certified for installation on combustible flooring.
Tested for 50 psi working pressure.
70
2,000 - 4,500 feet
Altitude
Output
Input
Output
(Btuh)
(Btuh)
(Btuh)
40,000
43,000
36,000
49,000
52,000
43,000
76,000
81,000
68,000
107,000
90,000
142,000
119,000
171,000
143,000
200,000
168,000
Boiler Manual
AHRI Certified Ratings
Heating
Seasonal
Capacity
Efficiency
Btuh
AFUE %
(Note 2)
41,000
84.0
49,000
84.0
77,000
84.0
102,000
84.0
135,000
84.0
162,000
84.0
189,000
84.0
Net
Boiler
Ratings
water
Vent
(water)
content
size
Btuh
Inches
(Note
Gallons
3)
(Note 4)
35,000
1.5
42,000
1.5
66,000
2.1
88,000
2.7
117,000
3.3
140,000
3.8
164,000
4.4
Part Number 550-142-302/0124
3"
3"
3"
3"
3"
3"
3"
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