Ratings - Lochinvar WH 55-399 Installation & Operation Manual

Ratings

Knight Wall Mount Boiler
Input
Model Number
MBH
Note: Change
(Note 5)
"N" to "L" for
L.P. gas models.
Min
WHN055 11
WHN085 17
WHN110 22
WHN155 31
WHN199 40
WHN285
57
WHN399
80
Maximum allowed working pressure is located on the rating plate.
NOTICE
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.
6
I=B=R Rating
Heating Net
Capacity
I=B=R
MBH Ratings
Water,
MBH
Max
(Note 2, 8) (Note 3, 8)
55 51 44
85 79 69
110 102 89
155 144 125
199 186 162
285 265 230
399 379 330
Installation & Operation Manual
Other Specifications
AFUE
%
Boiler Water
Water
Content
Connections
Gallons
(Note 1, 8)
96
2.5
96
2.5
96
3.5
96
3.5
96
5.0 1 1/4"
96
5.0 1 1/4"
95
6.5 1 1/2"
7. The Knight Wall Mount boiler input rate, on some models,
is reduced for vent lengths beyond the minimum. Two inch
vent will reduce Models WH(N,L) 055, WH(N,L) 085 and
WH(N,L)110 by 0.6%, 0.94%, and 1.2% for every 10 feet
of vent. Three inch vent will reduce Models WH(N,L)155,
WH(N,L)199 and WH(N,L) 285 by 0.3%, 0.5%, and 0.6%
for every 10 feet of vent. Four inch vent will reduce Model
WH(N,L) 399 by 0.4% for every 10 feet of vent.
8. Ratings have been confirmed by the Hydronics Institute,
Section of AHRI. Model 399 has a thermal efficiency
rating.
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 boiler is listed to UL353.
Figure A High Altitude Label Location
Vent/Air
Size
Gas
Connections
(Note 4)
1" 1/2" 2"
1" 1/2" 2"
1" 1/2" 3"
1" 1/2" 3"
1/2" 3"
1/2" 3"
3/4" 4"
UNIT EQUIPPED FOR
HIGH ALTITUDE
3,000FT TO 12,000FT