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1. | A O Smith Water Heater TC 049 R2 ManualA.O. SMITH SERVICE HANDBOOK Residential Gas and Electric Water Heaters Prepared by the Technical Training Department Asland City, Tennessee T he first portion of this Service Handbook addresses service issues associated with Residential Gas Water Heaters that are atmospherically vented and use a thermocouple as their electrical source. The second portion of this Handbook addresses service issues of Residential Electric Water Heaters having one or two heating elements and common wiring co... Brands:A | User Manual | ENGLISH | [View] | ||||||||||