®
Series 3
WATER
BOILER
— Boiler Manual
Ratings
®
DOE
Part number 550-142-182/1014
39
AHRI Certifi ed Ratings
Boiler
Model
Number
Burner Input
Heating
Capacity
Seasonal
Effi ciency
Net
Rating
(water)
Boiler
Water
Content
Flue
Conn.
Size
Shipping
Weight,
Approx.
Draft
Loss
Through
Boiler
GPH MBH
MBH
AFUE
%
MBH
Gallons
Inches
Pounds
Inches w.c.
Notes 2, 6,
Notes 1, 6
Notes 2, 6
Notes 3,6
Note 4
Note 5
UO-3RE
Note 7
0.80
Note 7
112
98
87
86
15.0
6”
636
0.000
UO-3E
1.00
140
123
87
107
15.0
6”
636
0.020
UO-4E
1.20
168
148
87
129
18.3
6”
737
0.050
UO-5E
1.40
196
173
87
150
21.5
6”
852
0.040
Notes:
(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
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 suffi cient 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 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 fi re rate baffl e when
reducing rate.