Water Filtering and Sterilization and Hot Water Recirculation

[fsgraz]

My RV is under restoration, so now or never. I wanted to experiment a bit out of the pure sensorics and iot and try another interesting use case:

1. 12V water boiler - in series with the Truma Combi gas boiler
2. wireless node to handle the boiler power supply (see the link above)
3. water tank loading with pre-filter, valve, pump and 1-stage filter
4. water filter, ultra-violet sterilizer, thermostatic mixer and warm water recirculation.

This new node handles the water loading, starting the valve and the pump via a push button, and stopping after 10' or when a Tank Full capacitive sensor is enabled.
A water flow sensor switches on the UVC water sterilizer for a minimum of 15' (to save power and minimize the amount of power cycles applied to the UVC lamp).

Three temperature sensors measure the temperature on the hot water delivery and return, and the connection between the Truma Combi boiler and the electric boiler.
The purpose is to keep the hot water always ready at the taps, keep the boilers water at the same temperature when needed and a few more other cases.

A pressure sensor inhibits the recirculation pump and the UVC Lamp if the pressure is too low.

This time I've pushed myself out of the comfort zone.

[hlehoux]

excellent!

[fsgraz]

@hlehoux thank you :blush:

[OldSurferDude]

Do you do gizmos for open heart surgery, too? I love all the valves!

:)

OSD

[fsgraz]

@OldSurferDude thank you !

[Lashundatayd]

That flow sensor triggering the UVC for a set time is a smart power-saving trick. Really impressive build overall.