Weil-McLain Gold CGs-4E Manual page 63

CGs-4E Gas-Fired Water Boiler — Boiler Manual
GOLD
13b
Ratings
Table 7 Boiler ratings
Boiler DOE
model Heating
number capacity
(Btuh)
(Note 1) (Note 2)
CGs-4E 77,000
(Note 5)
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. The CGs-4E boiler requires special venting, consistent with Category IV boiler. Use only the vent materials
and methods specified in CGs vent supplements. The CGs-4E boiler MUST 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-4E meets the Energy Star guidelines for
energy efficiency.
CGs-4E boilers used for residential radiant panel systems, converted gravity heating systems or other low water
temperature 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.
Part number 550-110-282/1108
0-2,000 feet 2,000-4,500 feet
Input Output Input
(Btuh) (Btuh) (Btuh)
90,000 77,000 81,000
Net Boiler
I=B=R water
Output
ratings content
(Btuh)
(Btuh) (gallons)
(Note 3)
69,300 67,000 2.1
DOE
(Note 5)
DOE Vent
Seasonal size
efficiency
(% AFUE)
(Note 5) (Note 4)
85.0 3"
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