Whirlwind FH-778 Air Conditioner "hookes law" Questions

need to decommission LG LS-K2463HL split system ie draw down gas before relovating unit. A charging hose or air con. gauges hook hose to low side of unit open vavle bleed off freon but i dont know why

how to pump down a ductless air conditioner split unit to remove how to pump down a ductless air coditioner split unit to remove it. if the unit contains R12 or R22 you are not permitted by law to do ...

how to refill R22 on Reem unit I have manifold with gauges & R22 refrigerant. Need diagram showing hookup? Some HVAC 'experts' install coil lines without a pressure outlet. (ecspecially older units) ...