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1. | A O Smith Water Heater TC 049R3 ManualSERVICE HANDBOOK Residential Gas and Electric Water Heaters M O D E L S C O V E R E D Residential Gas Water Heaters that are atmospherically vented and use a thermocouple as their electrical source. Residential Electric Water Heaters having one or two heating elements and common wiring configurations for these models. Part No. TC-049R3 $15.00 Printed in the U.S.A. 0505 ... Brands:A | User Manual | ENGLISH | [View] | ||||||||||