@raptor3624 MCB = Miniature Circuit breaker. Loosely speaking it is a switch that turn itself off when the current exceeds it's rating , basically acting as a fuse.
@avi Running current for a 2 ton 3 star AC should be around 10A, exact ratings you will get in the specification sheet. For an AC of this rating a 16A MCB is recommended and this should take care of any surge currents as well. Putting a 32A MCB is not of much use, as it will defeat the purpose of putting the MCB.
The current rating of wire is given as maximum current rating and not as continous current rating. So for a 2 ton AC it is suggestd that use a 4 sq mm wire, though 2.5 sqmm wire shall also take the load easily.
If you pair a 2.5 sq mm wire with 32A MCB, in case of overcurrent your wire will blow before your MCB trips.
Installation kit for AC are normally priced around ₹250 per running feet. This includes drain pipe, pair of copper tubes and ISI marked 2.5 sq mm 3 core cable[DOUBLEPOST=1461747777][/DOUBLEPOST]
@avi Your AC has a power rating of 1910 watts, so specified running current will be 8.3 Amp. Also I just checked, the AC board purchased by you already has a MCB so there is no need to install extra MCB.