York YK-EP, Operation And Maintenance Manual

Page: 28 / 268

Economizer system screen
Figure 8: Economizer system screen
This screen displays all parameters related to the Economizer feature.
The YK-EP Economizer feature is an optional feature and if so equipped, it must be enabled on the
SETUP Screen. Once enabled, this screen is accessible from the System Screen.
Table 10: Display only fields
Field/LED name Description
Discharge Temperature
Displays the temperature of the refrigerant vapor at the discharge
of the Primary Compressor before the refrigerant enters the
condenser.
Primary % Full Load Amps
Displays the percentage of full load amps (FLA) utilized by the
primary motor.
Primary Current Limit
Displays the primary active motor current limit in percentage of Full
Load Amps.
Primary PRV Position
Displays how open the PRV vanes are in percentage from 100% (fully
open) to 0% (fully closed).
Primary Motor Run (LED) Illuminates when the Primary Compressor is currently running.
Oil Sump Temperature Displays the temperature of the oil in the sump.
Primary Oil Pressure
Display indicates the pressure differential between the high side
oil pressure transducer (primary compressor) and the low side oil
pressure transducer (oil sump). The displayed value includes offset
pressure derived from auto-zeroing during the system prelube.
Economizer Motor Run
(LED)
Illuminates when the Economizer Compressor is currently running.
YK-EP Style B Centrifugal Chiller 28