Weil-McLain GOLD CGS 550-110-260/0508 User Manual page 63

GOLD CGs Gas-Fired Water Boiler — Boiler Manual
13b
Ratings
Table 7 Boiler ratings
Boiler DOE
model Heating
number capacity
(Btuh)
(Note 1) (Note 2)
CGs-3 57,000
(Note 5)
CGs-4 85,000
CGs-5 112,000
CGs-6 140,000
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
Notes 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.
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 fl ue gas condensation due to lower operating water temperatures. For alternate piping,
contact your Weil-McLain sales offi ce. CSA design certifi ed for installation on combustible fl ooring. Tested for
50 psi working pressure.
Part number 550-110-260/0508
0-2,000 feet 2,000-4,500 feet
Input Output Input
(Btuh) (Btuh) (Btuh)
67,000 57,300 60,300
100,000 85,000 90,000
133,000 112,400 119,000
167,000 140,300 150,300
Net Boiler
I=B=R water
Output
ratings content
(Btuh)
(Btuh) (gallons)
(Note 3)
51,600 50,000
76,500 74,000
100,600 97,000
126,300 122,000
DOE
(Note 5)
DOE Vent
Seasonal size
efficiency
(% AFUE)
(Note 5) (Note 4)
1.5 85.3
2.1 84.6
2.7 84.0
3.3 83.4
3"
3"
3"
3"
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