I have just installed one. On one side, I want to avoid the remote control to avoid about 100 Eur in the remote itself. On the other hand, that will just do manual step 1-2-3 on my unit otherwise, I should add few others 100 Eur to add CO2 and that will still be in only one place. This is why I would still try to add the remote integrated with HA 0-10v and different mobile sensors around house.
Thanks a lot, will check the project you followed and hope I have enough skills to finalize it and maybe for me will work.
If I have any other solution, will report back.
By the way, @guidok , how did you connect, only the 10v and GND pins? Or to the 12v pin also which I suppose is for the powering up of the wired remote itself from which will create the 0-10v.
Very good post, but I’m a bit confused. Bought one of these EC-fans ( Kanalfläkt CK 125 C EC ), from factory it got a potentiometer connected. My idea is to adapt it after this post but the confusing part for me is. Yes it’s specififed to use 0-10v. Manual doesnt really tell what values to enter for various speeds. Manual only shows specific of wires, but are all “EC” 0-10v the same or ?
I had an EC fan with no documentation and used my multimeter to work out the 10v and GND wire on the fan. I then removed my potentiometer on the fan and to allow the PWM (or what ever control board you are using) to directly input the 0-10v control voltage to the correct wires. My fan also had a tachometer wire but I didn’t bother with that.
i too am using an EC fan however in my case i need a PWM signal of 10V i bought the unit mentioned by @cuball. What is strange is that it works, however the fan judders on startup with around 10 sec gap between judders and eventually at a random point it will fire up. In HA i can only move the slider from 12% to 32% from lowest speed to maximum speed. What i am confused by is that the PWM module is out putting the voltage from 0-10V, but the doc states it is PWM as shown in diagram below, am i using the wrong module?
Havent had time to get around, but I did just order pwm to voltage, seams like I have all the other stuff, I’ll update with picture when I’ve set it up
Well I got all the stuff now, fiddling with to get some life in it
Thanks @inspectorgrow. Just ordered one and I will replace the existing one. Have a nice day!
Upd
I just changed PWM to DAC. I flashed it by esphome. Everything is working fine and now I have 0-10V linear voltage despite 5 V input power. Very easy to do with WeMos mini D1.
Hi @Guesswho620 , have you please managed by any way the automation for your Wolf CWL-400? I have a similar device and looking for a solution to set the right fan speed. thanks
sorry @Gaborlean , I’ve just came across your post! I ended up not doing this automation, after consulting with my provider who installed my air flow system. My initial goal was to shut down airflow when my airquality sensor detected smoke particles coming from neighbour (burning leaves even in my capital city is still a thing unfortunately, and f**cking unhealthy). He told me that you never completely stop an air flow system, not for a minute, because then condensation starts, and all sorts of other helth related problems arise (fungus, bacteria grow in the condensated vapor in the tubes, etc.) He suggested putting an active carbon filter plus an F7 filter in the machine to mitigate smoke issues), and I found a dirt cheap, but quality aftermakret filter provider called cleanfilter.eu where I found carbon filters for a very reasonable price, and yes, they do eliminate smoke smell in such cases). I hope this helps.
