High Fire [ 200 182 158 2" 3"
92.5% CPVC & PVC
Low Fire J 80 73 63
_ 1 MBH = 1,000BTUH (British Thermal Units Per Hour)
_2_Heating Capacity and AFUE (Annual Fuel Utilization Efficiency) are based on DOE (Departmentof Energy) test procedures.
284 Ibs.
High Fire 196 192 177 174.5 172 169 168 167
Low Fire 78.4 76.8 115 113.5 112 110 109 108
_ Boiler Input Rate is determined at minimum vent length. The rate will decrease as vent length increases.
2_Parameter 17is set to 2,250 at elevations of 2,000 feet and below.
3_Parameter 17 must be raised to 3,200 at altitudes or elevations of 2,000 feet and above.
• Heating Capacity indicates amount of heat available after subtracting losses up the stack. Most of this heat is available
to heat water. Small portion is heat loss from jacket and boiler surfaces, and it is assumed this heat stays in the
structure.
• Net AHRI Rating represents portion of remaining heat that can be applied to heat radiation or terminal units (i.e.,
finned tube baseboard, cast iron radiators, radiant floor, etc.) Difference between Heating Capacity and Net AHRI
Rating, called piping and pickup allowance, establishes reserve for heating volume of water in the system and
offsetting heat losses from piping.
• Net AHRI Ratings shown are based on piping and pickup factor of 1.15 in accordance with AHRI Standard. Net AHRI
Rating of selected boiler should be greater than or equal to calculated peak heating load (heat loss) for building or
area(s) served by boiler and associated hot water heating systems. Consult manufacturer before selecting boiler for
installations having unusual piping and pickup requirements.
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