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Series 3
Ratings
DOE
Boiler
Burner Input
Model
GPH
Number
Notes 2, 6
UO-3RE
0.80
Note 7
Note 7
UO-3E
1.00
UO-4E
1.20
UO-5E
1.40
Notes:
(1) Based on standard test procedures prescribed by the
United States Department of Energy at combustion
condition of 13.0% CO
2
draft.
(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 sufficient quantity for the requirements
of the building and nothing need be added for
Part number 550-143-013/0621
water boiler — Boiler Manual
AHRI Certified Ratings
Heating
Seasonal
Capacity
Efficiency
MBH
MBH
AFUE %
Notes 1, 6
Notes 2, 6
112
99
140
123
168
148
196
173
and –0.02" w.c. breeching
Net
Boiler
Rating
Water
(water)
Content
MBH
Gallons
Notes 3,6
87
86
15.0
87
107
15.0
87
129
18.3
87
150
21.5
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 draft 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 fire rate baffle when
reducing rate.
®
Draft
Flue
Shipping
Loss
Conn.
Weight,
Through
Size
Approx.
Boiler
Inches
Pounds
Inches w.c.
Note 4
Note 5
6"
636
0.000
6"
636
0.020
6"
737
0.050
6"
852
0.040
39
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