Weil-McLain 155, 80, 230, 310, 105 manual Ratings, GAS-FIRED WATER BOILER - Boiler Manual

11	GAS-FIRED WATER BOILER — Boiler Manual
Ratings
	DOE

Notes

Notes 1. As an Energy Star Partner, Weil-McLain has determined that Ultra boilers meet the Energy Star guidelines for energy

efficiency.

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.Ultra boilers require special venting, consistent with Category IV boiler. Use only the vent materials and methods specified in Ultra vent supplements. Ultra boilers must be direct-vented. Ultra-230 can be vented with either 3" or 4" vent pipe. Vent length limits for 3" vent are not as long as for 4" vent.

5.Weil-McLain Low temperature seasonal efficiency is based on ASHRAE 103 test method, using boiler return water temperature of 90°F, with boiler outlet water temperature of 110°F.

6.Combustion efficiency is based on I=B=R testing procedure BTS-2000, and equal to 100% minus flue loss.

7.Thermal efficiency is based on I=B=R testing procedure BTS-2000.

8.Weil-McLain Low temperature efficiency is based on the I=B=R testing procedures, using boiler return water temperature of 90°F and boiler outlet water temperature of 110°F.

9.Ratings shown are for sea level applications only. For altitudes from sea level to 5,500 feet above sea level, the Ultra boiler requires no modifications and automatically derates itself by approximately 4% per 1000 feet above sea level. For elevations above 5,500 feet, contact your local Weil-McLain sales office for details.

44 Part number 550-101-233/0903