I have come to the conclusion that the Crydom D1D12 relay is unsuitable (I believe it is actually rated for 100VDC, not AC), burnt out, or both. Upon connection to AC wall power, it immediately tries to power the heating element. Upon putting 5 volts to the DC side of the relay, it pulls so much amperage through the element that the water actually visibly swirls from the convection, and the lights in my garage dim. I have wisely disconnected it. I believe I will be replacing it with a Sharp S108T01, which is rated at 120 VAC, 8 Amps.
When I run it, I see no visible signs that it is overloading the circuit. Tomorrow I'll borrow a multimeter from work to find out just how much power is going through the circuit.
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Wednesday, 13 April 2011
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