york screw start up

[frostybritt]

york chiller pack, 2x250 kw screw comps been switched off for three years plus, what pre start up checks could anybody recommend other than heaters and valve positions,system have been charged (r134a) and commissioned about 5 years ago. have worked on recips mostly but not screws ,lookin for info if anybody can assist, cheers guys.

[techie]

hey dude best thing you can do strip comp out flush it out put new oil in and change oil seperator accumulator filter drier xpansion valve and actuator valves you dnt no what state it is in so you might have to overhaul it on the safe side of things there are no gaurantees how long it will run for if you leave on old oil that has been standing