Filter
Top Products
Part number 550-110-282/1108
63
GOLD
CGs-4E Gas-Fired Water Boiler — Boiler Manual
Ratings
Table 7 Boiler ratings
DOE
13b
(Note5)
CGs-4Eboilersusedforresidentialradiantpanelsystems,convertedgravityheatingsystemsorotherlowwater
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,contactyourWeil-McLainsalesofce.CSAdesigncertiedforinstallationoncombustibleooring.
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-4E
(Note 5)
77,000 90,000 77,000 81,000 69,300 67,000 2.1 85.0 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. 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.