York YK-EP Operation And Maintenance Manual page 89

Table 77: Adjustable
Field/LED
Access level
name
Econ Stop
Refrig Flow Service
Offset
Econ
Temperature
Service
Setpoint
Offset
Econ Startup
Service
Delay
Econ Start
Econ Level Service
Offset
Econ
Level High Service
Shutdown
Full Capacity
Service
PRV Position
Econ Exit
Boost Econ Service
Temp Offset
Econ PRV
Service
Start Position
Table 78: Setpoints
Button Access level
Econ Gear
Ratio Admin
Override
Econ Motor
Admin
Slip Factor
Econ
Impeller
Admin
Diameter
Override
YK-EP Style B Centrifugal Chiller
Description
Range 100 to 5000 CFM, Default 2000 CFM
Displays the difference between the refrigerant flow to start the
economizer and the refrigerant flow to stop the economizer. This
offset prevents the economizer from starting and stopping too
rapidly.
Range -6.0 to -2.5°F, Default -2.5°F
Displays the economizer temperature setpoint offset.
Range 0 to 30 minutes, Default 5 minutes
Displays the amount of time set to delay the start of the
economizer.
Range 0 to 100%, Default 40%
Shows the position of the Pre-Rotation Vanes at full capacity.
Range 80 to 100%, Default 95%
Displays the position of the Pre-Rotation Vanes at full capacity.
Range 80 to 100%, Default 95%
Displays the position of the main compressor PRV when it is
considered to be at Full Capacity.
Range 0 to 5°F, Default 1°F
Displays the offset of the temperature that controls when the chiller
exits the boost mode to go into the economizer mode.
Range 0 to 30%, Default 2%
Displays the starting position of the economizer prerotation vanes.
Description
Range 0.0 to 7.0, Default 0.0
Shows the override used if the gears are changed to accommodate
customer performance requirements.
Range 0.98 to 1.0, Default 0
Displays the slip factor of the motor. A 60 Hz motor isn't truly 60 Hz,
but rather a 59% motor. The difference is the slip factor.
Range 0.0 to 1.0, Default 0.0
Displays the change in size of the impeller if a different unit is used
in the economizer.
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