customer wants to start up a york yt chiller that has been sitting idle for 3 years. The history I was told is that the chiller was 200lbs low on refrigerant, in need of leak repairs, when it ran rust could be seen floating in sight glass,oil in rupture disc cup and shaft seal. York has looked at the machine, customer wants second look. There is a hot water heater in room was going to warm up chiller and leak test. As far as the rust I don think just oil changes will solve it. The last leak repair done years ago by another contractor showed the chiller 200lbs low. Is this machine going to be a nightmare that wont go away??????Also last time it was run some years ago went off on purge.