Raspberry Pi – Electric Water Heater Control (Final)

Home Forums Raspberry Pi Projects Raspberry Pi – Electric Water Heater Control (Final)

This topic contains 1 reply, has 1 voice, and was last updated by Z Z 2 years, 7 months ago.

Viewing 2 posts - 1 through 2 (of 2 total)
  • Author
    Posts
  • #180
    Z
    Z
    Keymaster

    This thread is a summary of the electric hot water heater control project I’ve somewhat wrapped up. (Caution: Working with electricity can be dangerous. Any information used from this site should be used at your own risk)

    Wiring/Schematic:

    Tinker Labz - Raspberry Pi Water Control Schematic

    The above image depicts the Raspberry Pi, Crydrom SSR, Adafruit ADC, CT, Temperature sensor, LED, and water heater. This isn’t my exact layout but very close.

    Home Intelligence Management System (HIMS) Homepage:

    Tinker Labz - Home Intelligence Management System (HIMS) Homepage

    The above image depicts the start of the Home Intelligence Management System. More to come on this as I integrate more projects.

    Water Heater Control Screen in HIMS:

    Tinker Labz - Home Intelligence Management System Water Heater Control Screen

    The above image depicts the WordPress Plugin screen created for HIMS that allows for setting the configuration for the water heater controls.

    Water Heater Status page in HIMS:

    Tinker Labz - Home Intelligence Management System Water Heater Status

    The above image depicts the status page in HIMS showing if the water heater is on and the temperature based on an external sensor mounted to the outflow.

    Water Heater Control Box:

    Tinker Labz - Water Heater Control Box

    The above image depicts the water heater control box which is a modified Network Interface Unit cabinet I had. I added the red LED as an indicator when the water heater is offline.

    Water Heater Control Box Inside View 1:

    Tinker Labz - Water Heater Control Box View 1

    The above image depicts the inside of the water heater control cabinet with the hinged “panel” closed protecting the high voltage connections and SSR.

    Water Heater Control Box Inside View 2:

    Tinker Labz - Water Heater Control Box View 2

    The above image depicts the inside of the water heater control cabinet with the hinged “panel” open showing the SSR, CT and high voltage connections. The hinged panel worked well for safety.

    Water Heater Control Box Inside View 3:

    Tinker Labz - Water Heater Control Box View 3


    Tinker Labz - Water Heater Control Box View 4

    The above images depict more inside views of the control box.

    #245
    Z
    Z
    Keymaster

    Well, the Crydom relay fried. They get extremely hot and apparently the little heat sink I used wasn’t sufficient. I would not recommend using one unless you have a better mounting option and method to keep it cooler for this application. I’m going to look at a mechanical relay next and update this once I find out. I’m not too worried as I’d prefer to find a normally closed relay this time instead of the SSR normal open. More to come . . .

Viewing 2 posts - 1 through 2 (of 2 total)

You must be logged in to reply to this topic.