How To Perform without wasting Release Split AC Refrigerant

Disassembling way split ac without wasting freon can you do in the following way:
split ac operated, wait until the indoor unit provides power supply gets outdoor unit.
after the outdoor unit can operate pairs of hose manifold blue reply on freon charging nipple and open the faucet valve cover nuts 1/4 and 3/8 that size (for 0.5 PK ac split size to 1 PK)

after the nut faucet valve open, grab a key size L which is equal to L keyhole who is in the faucet valve.
turn the faucet valve to the right until the end that the size of the quarter with the L key while looking at the needle manifold low pressure manifold to position the needle touched the figure of 30 "(under the number 0 psi vacuum).

after the needle touched the low pressure manifold 30 "faucet valve cap with a 3/8 size L key to the right until the end and then turn off the ac split immediately, do not be too long.
after the split ac turned off, unplug from the mains, when not using the plug means you have to unplug the power cord from the mains supply.
if you are not used to cut power to the power supply cable, I suggest turn off the MCB on the box or on the distribution of electrical power meter so you are not electric shock when disconnecting the power supply cord.

after which there is no power flowing to you then split ac disconnect the cable and the indoor and outdoor nepel.
after connection of indoor and outdoor nepel regardless, replace the cover nut and cover nepel faucet faucet valve with masking tape so that dirt can not enter.

as well as the pipe that is on the indoor unit also closed with masking tape so that dirt can not enter.
end of the pipe split ac installation must also be covered with tape, if you want to reuse.