Dry Throat Ac I Bought Voltas Split AC 1 Ton Recently. I Kept The Temperature As 21 Degree And Fan As Automatic.?

I bought Voltas split AC 1 ton recently. I kept the temperature as 21 degree and Fan as automatic.? - dry throat ac

But I felt very cold and my throat is very dry aftersome time. Can someone tell me what the temperature is perfect for me. I live in Chennai (India).