Quote:
Originally Posted by sundancer 87
Then where is the flame sensor wire? For many years all I've seen for DSI ignition is a much larger red wire for ignition.
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Here is a diagram of two 6-gallon water heaters made by Atwood. You will see that the diagram on the right exactly duplicates the OP's.
The one on the left is gas-only, no electric. It has some sort of a "pilot-relight" feature with a spark assembly. On my 2013 Coleman, it was even older, I had to push the red button on the valve in and hold it while lighting the pilot manually.
The diagram on the right is a gas/electric model, with automatic spark. The high voltage tower and porcelain insulator above the burn tube indicates that is a spark wire.
The Atwood owner's manual is a little strange, in that there are several diagrams without legends to the points numbered. Also, for a beginner, who has trouble with winterizing and valves, this is of no use. Written from just a water heater manufacturer's perspective, they just say that for winterizing, drain and flush (with air or water) the residual water at the bottom. As if it stands alone, and is not connected to an RV!