Maintenance; General - A.O. Smith DRE-52 Series Instruction Manual

restore factory defaults
From the Main Menu use the Up/Down buttons to select (highlight in black)
the "Restore Factory Defaults" menu.
Press the Operational Button underneath "SELECT." The Restore Factory
Defaults menu will be displayed.
From the Restore Factory Defaults menu press the Operational Button
underneath "YES." The display will show text confirming the factory default
settings have been restored.
Press the Operational Button underneath "BACK" to exit the Restore Factory
Defaults menu.

GEnErAL

ACtIon

MAIntEnAnCE

Periodically the drain valve should be opened and the water
allowed to run until it flows clean. This will help to prevent
sediment buildup in the tank bottom.
Periodically check the temperature and pressure relief valve to ensure
that it is in operating condition. Lift the lever at the top of the valve
several times until the valve seats properly and operates freely.
Water heater maintenance includes periodic tank flushing and
cleaning, and removal of lime scale from the heating element.
The heater tank is equipped with an anode rod to aid in corrosion control
and should be inspected periodically (see Anode Rod Inspection).
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