7
Ratings
A
S
M
E
H
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 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. 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 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.
6. High altitude Knight boilers are equipped to operate from
3,000 to 12,000 feet
only
. The boiler will de-rate by 2% for
each 1,000 feet above sea level. High altitude models are
manufactured with a different control module for altitude
operation, but the operation given in this manual remains
the same as the standard boilers. A high altitude label (as
shown in FIG. A) is also affixed to the unit.
Derate values are based on proper combustion calibration
and CO
2
's adjusted to the recommended levels.
7. Ratings have been confirmed by the Hydronics Section of
AHRI.
Maximum allowed working pressure is located on the rating plate.
NOTICE
Knight Boiler
AHRI Rating
Model Number
Note: Change “N” to
“L” for L.P. gas models.
Input
MBH
(Note 5)
Max Min
Heating
Capacity
MBH
(Note 2,7)
Net
AHRI
Ratings
Water,
MBH
(Note 3,7)
AFUE
%
(Note 1, 7)
KBN081
16
80
74
64
95
KBN106
21
105
97
84
95
KBN151
30
150
139
121
95
KBN211
42
210
196
170
95
KBN286
57
285
267
232
95
Other Specifications
Boiler
Water
Content
Gallons
Water
Connections
Gas
Connections
Air
Size
Vent
Size
(Note 4,8)
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
8. The Knight 286 model can be alternatively vented using a
3" vent/air size. If the 3" vent/air size is used, the maximum
vent/air pipe lengths are limited to 60 equivalent feet each.
9. Knight 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
Knight is listed to UL353.
Installation & Operation Manual