3
PN 240012689 Rev. A [05/15/2019]
New York City MEA Number 484-84-E Vol. IV.
BOILER RATINGS & CAPACITIES
Table 1 - RATINGS NATURAL AND PROPANE GASES
Model
Input
*Mbh
Heating
Capacity
*Mbh
**Net
AHRI Rating
Water
*Mbh
AFUE
Vent Diameter (Inches)
To Chimney
(Category I)
Horizontal Vent
(Category III)
UHSW42
42.5
36
31
84.4
4
3
UHSW75
75.0
63
55
83.4
4
3
UHSW112
112.5
94
82
83.0
4
3
UHSW150
150.0
125
109
82.7
4
3
UHSW188
187.5
155
135
82.3
4
4
UHSW225
225.0
186
162
82.0
4
4
* MBH = 1,000 Btuh = British Thermal Unit Per Hour. Boilers are equipped for altitudes up to 2,000 feet only. U.S.A.
Only - For altitudes above 2,000 feet, ratings should be reduced at the rate of 4% for each 1,000 feet above
sea level. Canada Only - Boilers may be used at high altitude (2,000-4500 feet/640-1350m) by using a certified
field conversion kit, resulting in a 10% de-rate. Contact Provincial authority having jurisdiction for installations
above 4500 ft (1350m)above sea level.+ Heating Capacity based on D.O.E. (Department of Energy) test
procedure.
**Net AHRI Water Ratings i
ndicate amount of remaining heat input that can be used to heat the radiation
or terminal units. Net AHRI Ratings shown are based on an allowance of 1.15 Selection of
boiler size should be based upon “Net AHRI Rating” being equal to or greater than calculated
heat loss of building.
Manufacturer should be consulted before selecting a boiler for installations having unusual piping
and pickup requirements.
This boiler cannot be used with all types of chimneys. Read these instructions carefully before installing.
These Gas-Fired Hot Water Boilers are low pressure, sectional cast iron boilers Design Certified by C.S.A. (Canadian
Standards Association) for use with Natural and Propane Gases. Constructed and hydrostatically tested for maximum
working pressure of 50 psi in accordance with A.S.M.E. Boiler and Pressure Vessel Code Section IV Standards for cast iron
heating boilers.
Boilers must stand on noncombustible floor. If installed on combustible floor, please refer to Repair Parts manual for
appropriate Combustible Floor Base part number.
Boilers For Use At High Altitude
Boiler is factory equipped for use at altitudes of 0-2,000 feet above sea level. For use at altitudes above 2,000 feet above
sea level, input ratings are reduced by change in main burner orifice size.
U.S.A.
For altitudes above 2,000 feet above sea
level, input ratings should be reduced at rate of 4% for each 1,000 feet above sea level. Consult National Fuel Gas Code
(NFPA54/ANSI Z223.1), or manufacturer for correct orifice sizing information. High altitude orifices are available from
boiler manufacturer.
Содержание UHSW Series
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