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Old 08-03-2020, 04:23 PM   #1
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Join Date: Aug 2020
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Tankless water heater swap

I have a 2015 crossroads z1 301bh. Atwood water heater burst causing us to make a switch to a girard tankless water heater. My problem is the girard heater runs only in 12vdc. I have two sets of wires leading back that should in theory be 12vdc. However after attempting to hook up to them as soon as the switch comes on the power alters and no longer registers 12vdc and girard he rater does not come on. The two sets of wires are white and orange and the other set is black and white. Anyone actually know which is which for this purpose?
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Old 08-03-2020, 10:18 PM   #2
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In the Systems category of the Documents section of this forum there is an Attwood [sic] Hot Water Service manual that has wiring schematics in it. It should help you identify the wires.

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Old 08-08-2020, 09:38 AM   #3
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We have this tankless water heater. I suggest calling the manufacturer. We called them and they were very helpful with troubleshooting some error issues.
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