Fig. 10 - Compressor Screen - York YT Millennium Operating & Maintenance

OptiView Control Center
FIG. 10
OVERVIEW
This screen displays a cutaway view of the chiller com-
pressor, revealing the impeller and shows all conditions
associated with the compressor. In addition, with the
proper Access Level, the pre-rotation vanes may be
manually controlled. Animation of the compressor
impeller indicates whether the chiller is presently in a
RUN condition. This screen also serves as a gateway
to subscreens for calibrating the pre-rotation vanes, cal-
ibrating the proximity probe, configuring the Hot Gas
Bypass or providing advanced control of the compressor
motor Variable Speed Drive.
DISPLAY ONLY
Oil Pressure
Displays the pressure differential between the high side
oil pressure transducer (compressor bearing input) and
the low side oil pressure transducer (oil sump). If either
of the transducers used to calculate this differential is
out of range, the display field will show XX.X.
Oil Sump Temperature
Displays the temperature of the oil in the sump
Discharge Temperature
Displays the temperature of the refrigerant in its gaseous
state at discharge of the compressor as it travels to the
condenser.
28
COMPRESSOR SCREEN
Superheat Temperature
Displays the discharge superheat temperature, calcu-
lated as (Discharge temperature – Condenser Saturated
temperature).
Vane Motor Switch (LED)
Illuminates when the vanes are completely closed.
Vent Line Solenoid (LED)
Illuminates when the solenoid is energized.
Pre-Rotation Vanes Control Mode
Access Level Required: SERVICE
Indicates whether the vanes are under manual or auto-
matic control.
[Pre-Rotation Vanes] Open (LED)
Access Level Required: SERVICE
Indicates whether the vanes are in the process of opening.
[Pre-Rotation Vanes] Close (LED)
Access Level Required: SERVICE
Indicates whether the vanes are in the process of closing.
Pre-Rotation Vanes Position
(Variable Speed Drive only)
Access Level Required: SERVICE
This value displays the present position of the pre-ro-
tation vanes as a percentage between 0 and 100%.
FORM 160.55-O1 (920)
00483VIP
YORK INTERNATIONAL