Ratings, Gold cgs gas-fired water boiler — boiler manual – Weil-McLain GOLD CGS 550-110-260/0107 User Manual
Page 63
Part number 550-110-260/0107
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GOLD CGs Gas-Fired Water Boiler — Boiler Manual
Ratings
Table 7 Boiler ratings
DOE
13b
(Note 5)
CGs boilers for residential radiant panel systems, converted gravity heating systems or other low 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 lower operating water temperatures. For alternate piping,
contact your Weil-McLain sales office. CSA design certified for installation on combustible flooring. Tested for
50 psi working pressure.
Boiler
model
number
DOE
Heating
capacity
(Btuh)
0-2,000 feet
2,000-4,500 feet
Net
I=B=R
ratings
(Btuh)
Boiler
water
content
(gallons)
DOE
Seasonal
efficiency
(% AFUE)
Vent
size
Input
(Btuh)
Output
(Btuh)
Input
(Btuh)
Output
(Btuh)
(Note 1)
(Note 2)
(Note 3)
(Note 5)
(Note 4)
CGs-3
(Note 5)
57,000
67,000
57,300
60,300
51,600
50,000
1.5
85.3
3"
CGs-4
85,000
100,000
85,000
90,000
76,500
74,000
2.1
84.6
3"
CGs-5
112,000
133,000
112,400
119,000
100,600
97,000
2.7
84.0
3"
CGs-6
140,000
167,000
140,300
150,300
126,300
122,000
3.3
83.4
3"
Notes
1. Add “PIN” for natural gas boiler - “PIL” for propane gas boiler.
2. Based on standard test procedures prescribed by the United States Department of Energy.
3. Net I=B=R 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 a piping and pickup allowance
of 1.15. An additional allowance should be made for unusual piping and pickup loads.
4. CGs boilers require special venting, consistent with Category III or IV boiler. Use only the vent materials and
methods specified in CGs vent supplements. CGs boilers may be direct-vented (using 3” diameter air piping)
as specified in the direct vent supplements.
5. As an Energy Star Partner, Weil-McLain has determined that the CGs-3 meets the Energy Star guidelines for
energy efficiency.