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Ratings
®
DOE
Part number 550-143-013/0621
39
Series 3
Notes 2, 6 Notes 1, 6 Notes 2, 6 Notes 3,6 Note 4 Note 5
Note 7
Note 7
112 99 87
123 87
148 87 129 737
173 87 852
(1) Based on standard test procedures prescribed by the
United States Department of Energy at combustion
condition of 13.0% CO
2
and –0.02” w.c. breeching
dra.
(2) Ratings shown are for sea level applications only.
For altitudes above 2,000 feet, derate the product
capacity by 4% per 1,000 feet above sea level.
(3) Net AHRI ratings are based on net installed
radiation of sucient quantity for the requirements
of the building and nothing need be added for
normal piping and pick-up. Water ratings are based on
a piping and pick-up allowance of 1.15. An additional
allowance should be made for unusual piping and pick-
up loads.
(4) See page 12 for minimum breeching and chimney sizing.
(5) Boiler dra losses are based on -0.02” in breeching.
(6) MBH refers to thousands of Btu per hour.
(7) A burner nozzle change is required-refer to the burner
instructions or boiler’s rating label for correct selection.
For Beckett AFG, use the burner low re rate bae when
reducing rate.
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