70
12.1 Ratings and Capacities
• Constructed and hydrostatically tested for maximum
allowable working pressure of 50 psig (pounds per
square inch gauge) (115 kPa) in accordance with
ASME Boiler and Pressure Vessel Code, Section IV,
Rules for Construction of Heating Boilers.
• In USA,
for elevations beyond 2,000-ft reduce
input by 4% for each 1,000-ft above sea level in
accordance with National Installation Code ANSI
Z223.1
• In Canada,
input rate is reduced by 10% for
elevations 2,000-ft to 4,500-ft. Contact Provincial
Authority having jurisdiction for Installations above
4500-ft (1350m) above sea level.
TABLE 14: SEA LEVEL RATINGS
NATURAL AND PROPANE GASES
Model
Number
Input, (MBH)
(1)
Heating Capacity
(MBH)
(1)(2)
Net AHRI Rating,
Water (MBH)
(1)(3)
AFUE
(2)
Maximum
Minimum
241
36
216
188
95.0
(1)
1000
Btu/hr (British Thermal Units Per Hour)
(2)
Heating Capacity and AFUE (Annual Fuel Utilization Efficiency) are based on DOE (Department of Energy)
test procedures.
(3)
Net AHRI Ratings based on piping and pickup allowance of 1.15. Contact Technical Support before selecting boiler for
installations having unusual piping and pickup requirements, such as intermittent system operation, extensive piping
systems, etc.
12 - RATINGS AND CAPACITIES
Central Heating
MAX
MIN
0-2,000 Ft
0-610 m
2,000-4,500 Ft
610-1,370 m
Heating Input
(Gross)
MBH
241
228
36
kW
70.6
69.0
10.5
Heat Output
(modulating)
Btu/h
216,330
205,410
32,070
kW
63.4
60.2
9.4
Gas Rate A
(Natural Gas)
ft3/h
242.6
228.22
35.9
m3/h
6.87
6.46
1.01
Gas Rate E
(LPG Gas)
ft3/h
95.0
90
13.5
m3/h
2.69
2.55
0.38
Max. CH
Water Temp.
(Approx.)
°F
°C
176
80
P/N 240011654, Rev. C [06/08/2017]
UCS-240
