How to pump down a ductless air conditioner split unit to remove

If the unit contains R12 or R22 you are not permitted by law to do the work yoiurself .. you have to have a "certified" person to reclaim the freon ... you might be able to get away with removing R134A (check local law) if thats what it has ... there is a service port that you can hook gages/hoses/vacuum pump up to .. (if not, then one must be added, usually in the form of a saddle valve that penetrates a low side feed pipe ... you should vent it into an approved tank or bladder (like a big balloon) for disposal or reclamation .. there may be a community service in your area that comes out and reclaims freon from old refrigerators and such .. in my area there is a free service that will reclaim the refrigerant and take away the old equipment .. i think its free or low cost .. some people simply vent R134 to atmosphere but that is polluting and may violate some laws .. R134 was thought to pose little hazzard but that is being reconsidered now in many countries

you can become certified yourself by attending a class and taking an exam that shows you understand the dangers and are aware of the law ..