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Ratings
Outdoor Knight XL Boiler
Model Number
Note: Change "N" to
"L" for L.P. gas models.
Min
OKN400
80
OKN501
100
OKN601
120
OKN701
140
OKN801
160
Maximum allowed working pressure is located on the rating plate.
NOTICE
Notes:
1. The ratings are based on standard test procedures prescribed by the United States Department of Energy.
2. 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 pickup. Ratings are based on a piping and pickup allowance of 1.15.
3.
Standard Outdoor Knight XL 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.
4. Ratings have been confi rmed by the Hydronics Section of AHRI.
5. Outdoor Knight XL boilers comply with the requirements of CSD-1 Section CW-400 requirements as a temperature operation
control. The manual reset high limit provided with the Outdoor Knight XL is listed to UL353.
AHRI Rating
Input
Gross
MBH
Output
(Note 4)
MBH
Max
(Note 1)
399
370
500
463
600
566
700
658
800
748
Outdoor Knight XL Installation & Operation Manual
Other Specifi cations
Net
AHRI
Boiler Water
Ratings
Content
Water,
Gallons
MBH
(Note 2)
3.4
322
4.2
402
4.2
493
5.0
572
5.7
651
Water
Gas
Air Size
Connections
Connections
1-1/2"
1"
1-1/2"
1"
2"
1"
2"
1"
2"
1"
7
4"
4"
4"
4"
4"
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