Rheem STELLAR 4A Series Owner's Manual And Installation Instructions page 44

COMMISSIONING
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation,
such as on a building site or where the premises is vacant, then;
•
Switch off the electrical supply at the water heater isolating switch on the
switchboard and at the isolating switch at the water heater (if installed).
•
Unplug the power supply cord from the power outlet (power supply cord
model only).
•
Close the cold water isolation valve at the inlet to the water heater.
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