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A.O. Smith 120 through 250 Series User Manual

Page 47

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Instruction manual BFC

47

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6. Isolate the water heater from the power supply by putting the isolator

between the appliance and the mains power supply to position 0.

7. Shut off the gas supply (10).
8. Close the stop valve (11) in the hot water pipe.
9. Close the stop valve (4) between the water tank and the cold water inlet (A).
10. Open the drain valve (9).
11. Bleed the appliance (or installation) so that it drains completely.

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IMD-0423 R0