York YK-EP, Operation And Maintenance Manual

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Variable Geometry Diffuser setpoints screen
Figure 22: Variable Geometry Diffuser setpoints screen
The Variable Geometry Diffuser setpoints are maintained on this screen. All setpoints require a
login access level of Service.
Note: Requires a login access level of SERVICE.
Table 53: Display only
Field/LED name Description
Stall Detector Voltage
Displays the Stall Detector output voltage, as received by the
Microboard.
Discharge Pressure Displays the Discharge Pressure.
Condenser Pressure Displays the Condenser Pressure
Pre-Rotation Vanes Position
Displays the position of the Pre-Rotation Vanes over the range of 0%
(fully closed) to 100% (fully open). Displayed as XXX until calibration
procedure is performed by Service Technician.
VGD Closed Limit Switch
Displays the status of the VGD Limit Switch. Displayed as CLOSED
when the switch is closed. This would be when the VGD is in the fully
closed position. Otherwise, the switch is displayed as open.
Diffuser Gap Close (LED) Illuminates when a close signal is being applied to the VGD.
Diffuser Gap Open (LED) Illuminates when an open signal is being applied to the VGD.
Surge Avoidance Surge
Detected (LED)
Illuminates momentarily when a surge is detected by the Surge
Protection feature. If equipped with a VSD or MVVSD, these are
only the surges detected while the drive is running at maximum
frequency.
YK-EP Style B Centrifugal Chiller 66