Quick question on a DIY thermostat controller for PELTIER WATER CHILLER

Discussion in 'General Marijuana Growing' started by Airwalker16, Feb 26, 2018.

  1.  
    Airwalker16

    Airwalker16 Well-Known Member

    431DB7EB-82C1-46DD-9D64-16F922EAEBE0.jpeg E1B7136C-A5E8-4978-9F53-15B0E9863E8E.jpeg BDE0EFB7-B492-40E4-BD6B-AF5465B37600.jpeg 34C49959-27E2-482E-B727-4FEF3A020207.jpeg question for mainly @dstroy but anyone who can help I’d appreciate an answer.
    If I were to buy a peltier water chiller and want to run it to a thermostat controller with a thermistor probe, would I just simply run the power supply to the 12v inlet, and then run the actual red and black wires(including the fan wires) to the 20a max relay output side? Also, has anyone had any experience with peltier coolers for chilling something small like I need? Which is around 5-7Gallons?

    I’d wire it all into a small project box so it’s nice and tidy.
     
  2.  
    dstroy

    dstroy Well-Known Member

    Yeah man, the load (cooler and fan) should get connected to the relay out.

    The power goes to the “dc 12v power interface” like you said.

    No practical experience with peltier coolers, just played around with them for fun so no clue how much water you can chill with it.
     
  3.  
    Airwalker16

    Airwalker16 Well-Known Member

    So the fans on these coolers I assume are probably rated for a quarter of an amp, maybe half or full, but those just get connected too? And pulls only what they need from the total of 6 amps?
     
  4.  
    Airwalker16

    Airwalker16 Well-Known Member

    @dstroy what’s the idea with this?
     
  5.  
    dstroy

    dstroy Well-Known Member

    Most computer size fans like that only use about 5-15w. There’s a sticker on the fan motor that says what it needs.
     
  6.  
    Airwalker16

    Airwalker16 Well-Known Member

    Yeah I know that. Also they usually say 0.25-1amp as well. So my question is do I just connect it all the same to the 6amp driver(20amp outlet relay on thermostat) and it will only pull what it Needs?
     
  7.  
    dstroy

    dstroy Well-Known Member

    Since you know the wattage and voltage you can calculate amperage easily.

    Yes, connect it all to the same output. You do not want that peltier chip to turn on and not have a fan running, it won't work or will break.
     
  8.  
    Airwalker16

    Airwalker16 Well-Known Member

    and I’m afraid I’m going to overload my 20a breaker with the addition of the chiller. Does it just need 6amps to get started or is that a constant draw of Power? Am I gonna need to add another 20a breaker to my box and add 3-4 more outlets? I’m already running quite a bit on this first one. 1100w of LEDs, 4 small air pumps and one large commercial one, multiple fans (1-6”/2-4”/2-oscillating), 1/10hp water chiller, 2 larger water pumps and one small one, and a few do dads here and there.

    I’ve never Tripped it before.
     
  9.  
    marijaymade

    marijaymade Member

    I like it, but I think I need some training to do this better to avoid stories that touch.
     

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