EcoSmart ECO-21 Installation Instructions Manual page 13

secure. Confirm that the correct wire gauge was used, and that the ground connections
were made in accordance with all applicable codes.
7. Before turning the power on, the system must be flushed as required in the plumbing
instructions.
8. When the unit is powered up the green LED indicator light will turn ON and then OFF. This
is normal. The tankless hot water heater is now ready to use!
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