Installation & Operation Manual
7
Ratings
Notes:
1. As an Energy Star Partner, Lochinvar has determined that
Knight boilers meet the Energy Star guidelines for energy
efficiency.
2. The ratings are based on standard test procedures
prescribed by the United States Department of Energy.
3. 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.
4. Knight boilers require special gas venting. Use only the vent
materials and methods specified in the Knight Installation
and Operation Manual.
5. Standard Knight boilers are equipped for operation up to
4,500 feet with no field adjustments. Output ratings will be
reduced by 4% for each 1,000 feet above sea level up to
4,500 feet only.
6. High altitude Knight boilers will have a high altitude label
affixed to the unit (as shown in FIG. A) and are equipped
for operation of 4,501 feet to 12,000 feet only with no field
adjustments. For high altitude models, output ratings will
be reduced by 2% for each 1,000 feet above sea level.
High altitude models have a different control module for
altitude operation, but the operation given in this manual
for standard models remains the same.
7. Ratings have been confirmed by the Hydronics Institute,
Section of AHRI.
Maximum allowed working pressure is located on the rating plate.
NOTICE
Knight Boiler
I=B=R Rating
Model Number
Note: Change “N” to
“L” for L.P. gas models.
Input
MBH
(Note 5)
Min Max
Gross
Output
MBH
(Note 2,7)
Net
I=B=R
Ratings
Water,
MBH
(Note 3,7)
KBN080 16 80 72 63
KBN105 21 105 94 82
KBN150 30 150 135 117
KBN210 42 210 190 165
KBN285 57 285 260 226
Other Specifications
Boiler
Water
Content
Gallons
Water
Connections
Gas
Connections
Air
Size
Vent
Size
(Note 4)
0.6 1" 1/2" 3" 3"
0.7 1" 1/2" 3" 3"
1.3 1" 1/2" 3" 3"
1.7 1" 1/2" 3" 3"
2.4 1-1/4" 3/4" 4" 4"
Figure A High Altitude Label Location
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