York YK-EP Operation And Maintenance Manual page 70

Table 56: Display only
Field/LED name
Discharge Pressure
Economizer Pressure
Head Pressure
PRV Position
VGD Control State
Table 57: Programmable
Button Access level
VGD Actuator Service
Open (with
Service
LED)
Close (with
Service
LED)
Hold Service
Auto Service
Table 58: Navigation
Button Access level
Home Service
Economizer
Service
Compressor
Setpoints Service
70
Description
Displays the current discharge pressure of the economizer
compressor.
Shows the pressure within the economizer.
Shows the head pressure of the economizer.
Displays the position of the pre rotation vanes in percent. Fully open
is 100% and fully closed is 0%.
Shows the current state of the VGD Control. It will show various
messages as follows:
• Undefined
• Disabled
• Stall Waiting
• Probing
• Stall Reacting
• PRV Override
• Sensor Failure Override
• Extreme Stall Override
• Manual Hold
• Manual Open
• Manual Close
• Inactive
Description
Displays the current state of the VGD Actuator. It will show either
Auto or Manual.
Pressing this button will send a command to open the VGD. The LED
will indicate on.
Pressing this button will send a command to close the VGD. The LED
will indicate on.
Pressing this button will hold the VGD in it's current position.
Pressing this button returns the VGD to automatic
Description
Returns user to HOME Screen.
Pressing this button will return to the Economizer Compressor
Screen.
Pressing this button will navigate to the Economizer VGD Setpoints
Screen.
YK-EP Style B Centrifugal Chiller