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Ratings
Maximum allowed working pressure is located on the rating plate.
NOTICE
Installation & Service Manual
Copper-fin
I=B=R Rating
Model Number
Note: Change “N” to
“L” for L.P. gas models.
Input
MBH
(Note 4)
Min Max
Gross
Output
MBH
(Note 1)
Net
I=B=R
Ratings
Water,
MBH
(Note 2)
CBN315 158 315 258 224
CBN360 180 360 295 257
CBN399 200 399 328 285
CBN500 250 500 410 357
Other Specifications
Boiler Water
Content
Gallons
Water
Connections
Gas
Connections
Vent
Size
(Note 3)
1.09
2" 3/4" 8"
1.12
2" 1" 9"
1.22
2" 1" 10"
1.30
2" 1" 10"
Notes:
1. The ratings are based on standard test procedures
prescribed by the United States Department of Energy.
2. 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.
3. Copper-fins require special gas venting. Use only the vent
materials and methods specified in the Installation and
Service Manual.
4. The Copper-fin is orificed for operation up to 2000 feet
altitude. The ap pli ance will be derated 4% per 1000 feet
above 2000 feet el e va tion. Consult the factory for
installations above 2000 feet elevation.
5. Ratings have been confirmed by AHRI.
Figure A High Altitude Label Location
UNIT EQUIPPED FOR
HIGH ALTITUDE
UP TO 2000 FT.