York YK Style H Operation Manual page 51

Table 30: Display only fields
Field/LED name
Discharge Superheat
Hot Gas Bypass Valve Position
Oil Pump Drive Command
Frequency (Variable Speed Oil Pump
Only)
High Speed Thrust Bearing Limit
Switch (LED)
Vane Motor Switch (LED)
Oil Return Solenoid (LED)
VSD Output Frequency
Motor % Full Load Amps
Input % Full Load Amps
PRV Opening (LED)
PRV Closing (LED)
PRV Command
PRV Position Standard Deviation
Motor Run (LED)
Table 31: Programmable
Button
PRV Stroke Time
PRV Period
Fault Acknowledge
Table 32: Navigation
Button
Home
Capacity Control
Oil Sump
Surge
VGD
PRV Calibrate
Proximity Probe Calibrate
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center
Description
Displays the discharge superheat, calculated as (Discharge Temperature – Condenser
Saturation temperature).
Displays the hot gas bypass valve position if that option is installed.
Displays the present frequency at which the oil pump is being commanded to run.
Displays the status position of the High Speed Thrust Bearing Limit Switch.
Extinguished when closed. This is the normal position. Only displayed on units with
Prox Switch.
Illuminates when the vanes are completely closed.
Illuminates when the solenoid is energized.
Displays the present frequency at which the VSD is being commanded to run. Only
displayed when a VSD drive is installed.
Displays the current to the motor as a percentage of the motor maximum current.
Displays the chiller current as a percentage of the job input Full Load Amps (FLA)
value.
Indicates whether the vanes are in the process of opening.
Indicates whether the vanes are in the process of closing.
This value displays the present position of the Pre-rotation Vanes as a percentage
between 0 and 100%.
Indicates the amount of error between the PRV setpoint and feedback. Shown in
Admin level only.
Illuminates when the compressor motor is running.
Description
Is set for the time the PRV takes to stroke from 0 to 100%. Adjustable between 1.0 and
180 seconds. Defaults to 100 seconds for 60 Hz line frequency and 120 seconds for 50
Hz line frequency units. Only displayed in Admin Access.
Sets the PRV tuning period. Adjustable between 0.01 and 0.20 seconds; default is 0.10
seconds) Only displayed in Admin Access.
This option allows clearing of the High Speed Thrust Bearing Limit Switch safety
shutdown.
Description
Returns user to Home Screen.
Navigates to the Capacity Control Screen.
Navigates to the Oil Sump Screen.
Navigates to the subscreen that allows viewing and programming of the Surge
Protection feature.
Navigates to the subscreen that allows viewing and programming of the variable
geometry diffuser feature.
Only available if the chiller is stopped and the system uses a Variable Speed Drive or
Hot Gas Bypass control. Navigates to the subscreen allowing calibration of the Pre-
rotation Vanes. Required Service Access Level.
Only available if the chiller is stopped. Navigates to the subscreen allowing calibration
of the High Speed Thrust Bearing Proximity Probe sensor. Only shown on units with a
Proximity Probe. Requires Service Access level.
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