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Ratings
A
S
M
E
H
Notes:
1. As an Energy Star Partner, Lochinvar has determined that
outdoor 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 AHRI 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. Standard outdoor boilers are equipped to operate from sea
level to 4,500 feet only with no adjustments. The boiler will
de-rate by 4% for each 1,000 feet above sea level up to 4,500
feet.
5. Ratings have been confirmed by the Hydronics Section of
AHRI.
6. Outdoor boilers temperature controls comply with the
requirements of CSD-1 Section CW-400 requirements.
The manual reset high limit provided with the outdoor
boiler is listed to UL353.
Maximum allowed working pressure is located on the rating plate.
NOTICE
Outdoor Knight Boiler
AHRI Rating
Model Number
Note: Change “N” to
“L” for L.P. gas models.
Input
MBH
(Note 4)
Max Min
Heating
Capacity
MBH
(Note 2,5)
Net
AHRI
Ratings
Water,
MBH
(Note 3,5)
AFUE
%
(Note 1, 5)
OKN151 30 150 141 122 94
OKN211 42 210 197 171 94
OKN286 57 285 266 232 94
Other Specifications
Boiler
Water
Content
Gallons
Water
Connections
Gas
Connections
Air
Size
1.3 1" 1/2" 3"
1.7 1" 1/2" 3"
2.4 1-1/4" 3/4" 4"
Outdoor Knight Boiler Installation & Operation Manual