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Titan-SCR2 N-120, water heater, need schematics

Im looking schematics for Titan N120 SCR2 anyone can help?
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  • herron_m Apr 14, 2009

    Need the wiring diagram for a Titan N-120 tankless water heater. I had to take mine apart to clean deposits out of it. I need to know which wires go where on the control board and which wires go where on the heating elements.



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I have taken pictures and produced a wiring diagram for this model

Posted on May 11, 2009

  • 9 more comments 
  • Michael Malys Nov 21, 2010

    I am having the same problem. Would you give me the picture of the wiring also?

  • DevilDog35 Dec 27, 2010

    I could use one too! Mine started smelling of melting plastic or burning wire. I found the first (left) heating element thermostat a little loose. I hope i can fiix it.

  • robert finn Jan 20, 2011

    I would love a copy of said diagram as well. thanking you

  • Parose84 Mar 07, 2011

    Did you get a wiring diagram for the Titan Scr2 N-120 tankless water heater. Can you please send it to me.

  • Parose84 Mar 07, 2011

    Can you please send me the wiing diagram.

  • REV5132 Mar 22, 2011

    Could you send me a picture of the wiring also

  • Judes May 19, 2012

    Good Day I am sorry to bother but we really need the picture also as we changed the elements and still nothing so I hate to know we may have wasted the cost of the elements. Please help and send us your pic.

  • Judes May 19, 2012

    Good Day we too need your picture as we bought the elements and need to check the wiring. Please can you send it to us.

  • Jorge Ju?rez
    Jorge Ju?rez May 22, 2012

    Good day herron_m, I need a copy too of your wiring diagram, could you send it to me ???

  • Joyce Garrity
    Joyce Garrity Dec 08, 2012

    I need a schematic too?!

  • btr1127
    btr1127 Feb 28, 2013

    please send me a copy toooo please


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Niagra Industries who builds the N-120 charges a flat rate $60 to repair the unit and ship it back to you no matter what happens to it. They will not supply a diagram. One common problem is a supply wire inside burning into two pieces. I have two that are bad. One lasted 3 years and the oher didn't work out of the box but I had it as a backup and didn't try it til the warranty had expired.

Posted on May 09, 2009

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The pin outs for the Titan SCR2 N-120 made prior 2004 with the two red LEDs one on the top of the other and the analog thermometer in the middle of the panel is: Numbering the pins from the Left to the Right.
1. Red -> Phase A
2. White -> Phase B
3. White -> Thyristor 1, Gate Leg 3
4. White -> Thyristor 2, Gate Leg 3
Red -> Thermostat
6. Red -> Reed Switch

Also on the left side of the board there is a 10K 5Watt resistor that gets loose from the board because overheats and it needs to core solder back with soldering iron.

Posted on Mar 28, 2012

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I didn't get a diagram with mine either.
Contact and use " contact us" " to see if they will supply the diagram.
I had no respose from them when I asked if I could put a remote temperature control in my bathroom. I can do it myself now that the warrenty has expired. LOL

Posted on May 06, 2009

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Posted on Jan 02, 2017

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On the left side of the board there is a 10K 5Watt resistor that gets loose from the board because of overheat and it needs to core solder back with soldering iron.


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