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Kevinsharley's avatar
Kevinsharley
Explorer
Aug 06, 2018

Nautilus iw60 on demand tankless hot water heater wiring

I'm having issues hooking it up the wiring that is. The Nautilus iw60 wires coming off of it or orange black red blue and two whites. The wires that I have out of my travel trailer are green brown and blue along with the main power of black white and the solid copper I know goes to the little green screw on the back of the unit however I don't know what the other wires go to or what's what please help.
The old unit was a 6 gallon Suburban I don't know how to change my preferences so I can get a copy of a schematic sent here so I have to repost this
  • Suburban Water Heater 12V DC Wiring


    Pre 2004 Atwood 12V DC wiring (Brown/Green/Blue wires)
  • IT would help to know WHAT you are replacing......A Suburban or Atwood water heater.


    Nautilus wiring
    Black (-)12VDC
    Red (+) 12VDC
    Blue and Orange - For a lamp connection
    White - 2 white lines for the On Demand Control Center


    RV wires.....
    The Black/White/Copper are 120V AC wires and NOT USED. Nautilus is all 12V DC ONLY
    Open the 120V AC Circuit Breaker for water heater (electric element)...MARK it and wire nut/tape off those wires.

    Need Old water heater brand/model....???

    Here is the wiring diagram for the Nautilus (which should be with installation instructions)


    Nautilus Service/Training Manual