I pumped the unit down. i did let the crankcase go into a vacuum for a short period. Shut down unit and let the 30# cylindar empty into system via the liquid charging port on the bottom.
when compressor started, its like a lagging almost low voltage sound\drone for about 3 sec and then takes off normal.
Has anyone else experienced this?
then next 3 starts thru out the morning all sounded normal.
This happened on 2 diffent chillers today as i completed a leak check and repair on each. Systems are tight, 550 microns via my new JB digital vac guage, no leaks now