Ratings
Copper-fin
I=B=R Rating
Model Number |
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| Gross | Net |
Input |
| MBH | I=B=R | ||
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| Output | Ratings | ||
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| (Note 4) | MBH | Water, | |
Note: Change “N” to |
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| MBH | ||
“L” for L.P. gas models. |
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| Min |
| Max | (Note 1) | (Note 2) |
CBN497 | 250 |
| 495 | 401 | 349 |
CBN647 | 350 |
| 645 | 522 | 454 |
CBN747 | 350 |
| 745 | 603 | 524 |
CBN987 | 360 |
| 985 | 798 | 694 |
CBN1257 | 720 |
| 1255 | 1017 | 884 |
CBN1437 | 720 |
| 1435 | 1162 | 1010 |
CBN1797 | 720 |
| 1797 | 1454 | 1264 |
CBN2067 | 990 |
| 2065 | 1673 | 1455 |
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Installation & Service Manual
Other Specifications
Boiler Water |
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| Vent Size | |
Water | Gas |
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Content |
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Connections | Connections | (Note 3) | ||
Gallons | ||||
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1.7 | 2" | 1 1/4" | 6" | |
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2.0 | 2" | 1 1/4" | 8" | |
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2.1 | 2" | 1 1/4" | 8" | |
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2.2 | 2 1/2" | 2" | 10" | |
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2.6 | 2 1/2" | 2" | 12" | |
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2.9 | 2 1/2" | 2" | 12" | |
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3.3 | 2 1/2" | 2" | 14" | |
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3.6 | 2 1/2" | 2" | 14" | |
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NOTICE | Maximum allowed working pressure is located on the rating plate. |
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Notes: |
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1. The ratings are based on standard test procedures prescribed | HIGH ALTITUDE | ||
LABEL | |||
by the United States Department of Energy. | |||
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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.
4.The
feet above 2000 feet elevation. Consult the factory for | Figure A High altitude label location_boiler | |
installations above 2000 feet elevation. | ||
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5. Ratings have been confirmed by AHRI. |
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