Document nkR4GnxbYvQxD64eMYnmRDe9w

380 CHAPTER IS 1952 Guide are considered consistent with good practice, although there are boilers which have high efficiencies and also operate at higher transmission rates. TESTING AND RATING CODES The Society has adopted four solid fuel testing codes, a solid fuel rating code, and an oil fuel testing code. ASHVE Standard and Short Form Heat Balance Codes for Testing Low-Pressure Steam Heating Solid Fuel Boilers--Codes 1 and 2--(Re vision of June, 1929),1 provide a method for conducting and reporting tests to determine heat efficiency and performance characteristics. ASHVE Performance Test Code for Steam Heating Solid Fuel Boilers ---Code No. 3--(Edition of 1929)1 is intended for use with ASHVE Code for Rating Steam Heating Solid Fuel Hand-Fired Boilers.2 The object of this test code is to specify the tests to be conducted, and to provide a method for conducting and reporting tests to determine the efficiencies and performance of the boiler. The ASHVE Standard Code for Testing Steam Heating Boilers Burning Oil Fuel,3 (Adopted June, 1932), provides a standard method for con ducting and reporting tests to determine the heating efficiency and per formance characteristics when oil fuel is used with steam heating boilers. The ASHVE Standard Code for Testing Stoker-Fired Steam Heating Boilers,4 (Adopted June, 1938), provides a test method for determining the efficiency and performance characteristics of any stoker and boiler combination burning any type of solid fuel, such as. anthracite or bi tuminous coal. The Steel Boiler Institute, Inc. has adopted a Rating Code for Com mercial Steel Boilers and Residential Steel Boilers, and for Testing OilFired Residential Steel Boilers (Fifth Edition as Revised Jan. 1, 1948). The commerical boilers (defined as those having 129 to 2500 sq ft of heating surface) are rated in square feet (steam) on the basis of heating surface with limitations set for grate area, furnace volume, and furnace height. SBITable 1. Net Rating Data fob Residential Steel Boilers--Oil Fired0 Sq Ft Steam 275 320 400 550 700 900 1100 1300 1500 1800 2200 2600 3000 SBI Net Rating Sq Ft Water 440 510 640 880 ,1120 1440 1760 2080 2400 2880 3520 4160 4800 Btu 66000 77000 96000 132000 - 168000 216000 264000 312000 360000 432000 528000 624000 720000 Minimum Furnace Volume Cu Ft 2.5 2.9 3.6 5.0 6.4 8.2 10.0 11.8 13.6 16.4 20.0 23.6 27.3 Heating Surface Sq Ft 16 19 24 32 41 53 65 77 88 106 129 153 177 * Stoker-fired and Gad-fired SBI Net Rating not greater than Oil-fired. Hand-fired, SBI Net Rating (Steam) not greater than 14 times the square feet of heating surface. is. ! !' i% j