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Installation & Operation Manual
6
Ratings
Notes:
1. As an Energy Star Partner, Lochinvar has determined that
Knight wall mount 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 wall mount boilers require special gas venting. Use
only the vent materials and methods specified in the Knight
Wall Mount Installation and Operation Manual.
5. Standard Knight wall mount 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 wall mount boilers are equipped to
operate from 3,000 to 12,000 feet only with no field
adjustments. The boiler will de-rate by 2% for each 1,000
feet above 3,000 feet. 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.
Maximum allowed working pressure is located on the rating plate.
NOTICE
Knight Wall Mount Boiler
I=B=R Rating
Model
Number
Note: Change
“N” to “L” for L.P.
gas models.
Input
MBH
(Note 5)
Min Max
Heating
Capacity
MBH
(Note 2, 8
Net
I=B=R
Ratings
Water,
MBH
(Note 3, 8)
AFUE
%
(Note 1, 8)
WBN050 10 50 45 39 95.3
WBN080 16 80 72 63 95.3
WBN105 21 105 94 82 95.4
WBN150 30 150 135 119 95.5
WBN210 42 210 190 165 95.7
7. The Knight Wall Mount boiler input rate, on some
models, is reduced for vent lengths beyond the
minimum. Models WB(N,L)080 and WB(N,L)105 with
2" vent will reduce 1% for every 10 feet of vent. Models
WB(N,L)150 and WB(N,L)210 with 3" vent will reduce
0.5% for every 10 feet of vent.
8. Ratings have been confirmed by the Hydronics Institute,
Section of AHRI.
Other Specifications
Boiler Water
Content
Gallons
Water
Connections
Gas
Connections
Vent/Air Size
(Note 4)
0.6 1" 1/2" 2"
0.6 1" 1/2" 2"
0.7 1" 1/2" 2"
1.3 1" 1/2" 3"
1.7 1" 1/2" 3"
Figure A High Altitude Label Location
UNIT EQUIPPED FOR
3,000 FT. TO 12,000 FT.
HIGH ALTITUDE