Tuya TS0601 - Moes HY368 TRV - Best Practices - Summary Thread

[hainfelder]

Is there a way to set valve position directly?

I did not find a way to set the valve position directly. (it would be great though - then all the logic could be programmed in HA)

But user @gavlexx may have found a way. See his post here on HAC. He replaced the NTC (temperature probe) with a fixed resistor.

@gavlexx

Advanced users of this valve can make upgrade to control valve position without any temperature calibrations.
You can solder fixed resistor instead of NTC and then set target temperature to change valve position to desired value. If X is your target temperature then valve position will set according to actual temperature Y:
Y=X+1: position - 100%
Y=X: position - 90%
Y=X-1: position - 80%
…
Y=Х-8: position - 10%
Y=X-9: position - 0%

So you can fix Y with certain resistor (say 10k for 25 degrees) and then set position indirectly - by setting target temperature different from this fixed value for several degrees. Without any calibration. And you will be sure that your valve position is set to your desired value without any fluctuation for internal temperature sensor.

Not confirmed.

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Tuya TS0601 - Moes HY368 TRV - Moes HY369RT, SHOJZJ 378RT, Silvercrest TVR01, Immax 07732B, Evolveo Heat M30 - set valve position, Best Practice