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The A.O. Smith 100109528 is a genuine OEM 2-element conversion kit designed for electric water heaters. This kit converts a single-element water heater configuration to a dual-element setup, allowing the unit to heat water more efficiently across upper and lower tank zones. Operating at 277 volts and 2500 watts, this kit is intended for commercial or industrial water heater applications where 277-volt service is standard. Installation is performed by a licensed plumber or water heater service technician working with the appropriate electrical infrastructure.
This conversion kit is suited for electric water heater systems operating on 277-volt single-phase power, commonly found in commercial buildings, multi-unit residential structures, and light industrial facilities. The kit provides the components needed to restore or upgrade element configuration in compatible A.O. Smith electric water heater models. Because fitment is model- and serial-number-specific, confirm compatibility against factory production records before installation.
Designed for use in specific A.O. Smith electric water heater models and serial number ranges. Fitment is not universal. Verify the target model and serial number against A.O. Smith factory production records before ordering.
This kit should be installed by a licensed plumber or qualified water heater technician. Disconnect all electrical power to the water heater at the circuit breaker and shut off the cold water supply before beginning any service. Work must comply with applicable local electrical codes and the National Electrical Code (NEC) for 277-volt circuits. Do not energize the elements until the tank is completely full of water to prevent dry-fire damage.
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