Weil-McLain 550-110-260/0107 manual 13b Ratings, Doe

GOLD CGs Gas-Fired Water Boiler — Boiler Manual

13b Ratings

								DOE
										(Note 5)
Table 7  Boiler ratings
Boiler		DOE	0-2,000 feet		2,000-4,500 feet		Net	Boiler	DOE	Vent
model	Heating						I=B=R	water	Seasonal	size
			Input	Output	Input	Output
number	capacity						ratings	content	efficiency
		(Btuh)	(Btuh)	(Btuh)	(Btuh)	(Btuh)	(Btuh)	(gallons)	(% AFUE)
(Note 1)		(Note 2)					(Note 3)		(Note 5)	(Note 4)
CGs-3		57,000	67,000	57,300	60,300	51,600	50,000	1.5	85.3	3"
(Note 5)
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"
	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 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 550-110-260/0107

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