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1. | A O Smith Water Heater 120 through 250 Series ManualService Handbook Cyclone XHE Extra-High Thermal Efficiency M O D E L S C O V E R E D BTH Models 120 through 250 Series 960 through 967, 970 and 973 Part No. TC-044R6 Printed in the U.S.A. 1105 ... Brands:A | User Manual | ENGLISH | [View] | ||||||||||