Question about Rheem Water Heaters
1) If upper element is receiving 240V, then water heater should have some hot water.
If upper element is burned out, then tank will have no hot water, but element will still test for 240V
2) Keep in mind that upper element heats top part of tank first.
Only when top part of tank reaches thermostatic temperature will power be sent to lower thermostat and element. This is called non-simultaneous operation.
3) Non-simultaneous operation is necessary for most water heater installations because both elements are not ON at same time. Either upper element is ON or lower element is ON or both are off.
Each element is typically 4500 watts, which is 18.75 amps.
If both elements were ON at same time, it would consume 37.5 amps, so circuit breaker would have to be 40 or 50 amp with 8 or 6 gauge wire.
4) Add a comment with your experience so others with same-similar problem can benefit.
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Posted on Mar 26, 2011
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Posted on Jan 02, 2017
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