A.O. Smith DRE 52, Installation, User And Service Manual

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4. Replace the heating element when the resistance value is not correct.
a)
Decommision the water heater (see 8.7).
b) Loosen electrical wires earth (A) and live (L) on the element.
c) Loosen the heating element.
d) Take the heating element out of the water heater.
e) Place a new element in the tank.
f) Tighten the heating element.
g) Attach the electrical wires earth (A) and live (L) on the element.
5. Make sure that all wiring is installed correctly.
6. Make sure that all electrical screw connections are tightened.
7. Install the isolating material.
8. Close the door.
9. If necessary, fill the water heater (see 8.6.1).
9.4 Finalization
When all maintenance activities are done:
1.
If necessary, fill the water heater (see 8.6.1).
2. Turn on the water heater (see 4.1).
3. Check if the performance of all components is correct:
a)
Make sure that the water heater operates the operating cycle correctly.
b) If applicable, make sure that the T&P valve operates correctly.
Open the T&P valve pressure relief and make sure that water spurts out.
Warning
Hot water can come out of the T&P valve.
c) Make sure the pressure relief connection of the expansion valve operates
correctly.
Open this pressure relief and make sure that water spurts out.
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48 Installation, Maintenance and Service part
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