Thanks to Canida, he gave a great addition below in the Comments: "A necessary addendum to Step 1: verify this breaker actually maps to your hot water heater. Our breaker box had a full set of labels that turned out to be randomly applied!"
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Step 1: Disconnections
1. Locate your Power Box on your house and turn off the breaker labeled 'Hot Water Heater', ours was H/W Heater.
2. Remove the plate on the hot water heater then remove the wire nuts.
3. If you have conduit running to the wall then remove the plate and the conduit.