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How to hook up a 2 wire thermostat

Discussion in 'General Electronics Discussion' started by computer-joe, Dec 16, 2017.

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  1. computer-joe

    computer-joe

    29
    6
    Oct 6, 2016
    I have an old thermostat which i want to replace, but i don't understand exactly how it's supposed to be done.
    It's a simple baseboard heater with no fan, air conditioning or anything fancy

    It only has 2 wires, and the instructions are no good
    it was supposed to be simple but turned difficult in minutes

    Where exactly are these wires supposed to go

    old thermo wiring
    20171215_185215.jpg

    Thermo
    20171215_191613.jpg

    Instructions
    instruct.png




    i also have a second thermostat which i did not succeed to install it,
    20171215_191639.jpg

    instructions
    th2.png


    why oh why is this so hard







    does anyone know exactly how i am supposed to hook these up??
     
  2. Externet

    Externet

    775
    168
    Aug 24, 2009
    The original thermostat is meant to interrupt maaany Amperes at the current the baseboard heater element consumes in series to it. Works/rated usually on 230VAC

    The replacement thermostats shown are wimpy ones meant to signal 24V relays inside an airconditioner/furnace/fan unit to turn on/off.

    Wrong device for your needs. If you hook it up, will leak its smoke. For sure.
     
    Rayregula likes this.
  3. Externet

    Externet

    775
    168
    Aug 24, 2009
    Check the plastic nut connectors have healthy, clean, tight splices inside, at both ends of the heater assembly before replacing thermostat. Diagnose, probe for continuity at the existing thermostat and voltage supply presence. It usually is :

    ACphase1circuit breaker-----x----thermostat-----x------heater element-----x-----circuitbreaker2ACphase2

    x= splice/joint/connector

    Listen for a 'click' when turning knob.

    ----> https://duckduckgo.com/?q=baseboard+thermostat&t=canonical&iax=images&ia=images

    ----> http://www.homerepairforum.com/forum/attachment.php?attachmentid=1987&d=1348147051

    Be careful touching live wires, will give you the giggles. Work safely.
     
    Last edited: Dec 16, 2017
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