Economizer compressor screen
Figure 14: Economizer compressor screen
This screen displays a cutaway view of the Economizer compressor, revealing the impeller, and
shows all conditions associated with the compressor. In addition, with the proper access level,
the Pre-Rotation Vanes may be manually controlled. Animation of the compressor impeller
indicates whether the chiller is presently in a RUN condition. This screen also serves as a gateway to
subscreens for calibrating the Pre-Rotation Vanes, calibrating the Proximity Probe, configuring the
Hot Gas Bypass, or providing advanced control of the Compressor Motor Variable Speed Drive.
Table 29: Display only
Field/LED
name
Access level Description
Oil Pump
Drive
Command
Frequency
–
Displays the command frequency of the Oil Pump Drive. The
frequency will go up or down to match the pump motor output to
the required oil pressure.
Discharge
Temperature
–
Displays the temperature of the refrigerant in its gaseous state at
discharge of the compressor as it travels to the condenser.
Discharge
Superheat
–
Displays the discharge superheat, calculated as (Discharge
Temperature – Condenser Saturation temperature).
High Speed
Thrust
Bearing Limit
Switch LED
–
Displays when the high-speed thrust bearing limit switch is
activated.
Pre-Rotation
Vanes
Opening LED
– Displays when the Economizer PRV is opening.
YK-EP Style B Centrifugal Chiller46
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