====== Hydrostatic Bearing Oil Chillers ======
==== M Franz, Oct 5, 2018 ====



In the event that the one of the green indicators fails to illuminate 
when the chillers are set
to "AUTO", the mushroom switch is pulled and the circulating pump is 
running, there is
another way to verify operation. Under the Omron temperature controller 
on the right,
front of the chillers-control cabinet, there is a multi-position, rotary 
selector. Above this
selector is a digital, LED amperes display. This display will show the 
ampere draw of the
motor selected with the rotary switch. The two first most 
counterclockwise positions
of the selector should show the ampere draw of whichever chiller is 
running at the time.
Since the chillers alternate at every startup, checking both of the 
positions should reveal
current draw for one of the motors, verifying operation. Normal current 
operating range
is 6.3 - 7.2 amperes, depending on oil temperature, ambient air 
temperature, and whether
of not the operating chiller's condenser fan is running at the time.