6
Installation & Operation Manual
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 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 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
AHRI 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
AHRI
Ratings
Water,
MBH
(Note 3, 8)
AFUE
%
(Note 1, 8)
WBN051
10
50
45
39
95.3
WBN081
16
80
72
63
95.3
WBN106
21
105
94
82
95.4
WBN151
30
150
135
119
95.5
WBN211
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)081 and WB(N,L)106 with 2" vent will
reduce 1% for every 10 feet of vent. Models WB(N,L)151
and WB(N,L)211 with 3" vent will reduce 0.5% for every
10 feet of vent.
8. Ratings have been confirmed by the Hydronics Section of
AHRI.
9. Knight wall mount 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 wall mount is listed to UL353.
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
HIGH ALTITUDE
3,000 FT. TO 12,000 FT.