Economizer oil pump screen
Figure 28: Economizer oil pump screen
This screen displays a close-up of the chiller economizer oil sump and provides all the necessary
setpoints for maintaining the Economizer Variable Speed Oil Pump (VSOP). In addition, this screen
allows manual control of the frequency command sent to the VSOP.
Table 71: Display
Field/LED
name
Access level Description
Oil Pressure –
Displays the pressure differential between the high side oil pressure
transducer (output of oil filter) and the low side oil pressure
transducer (compressor housing). The displayed value includes
offset pressure derived from auto-zeroing during the System
Prelube (refer to explanation of auto-zeroing in Primary compressor
screen). If either of the transducers used to calculate this differential
is out of range, the display field will show XX.X.
Oil Sump
Temperature
– Displays the temperature of the oil in the sump.
Pump Oil
Pressure
(HOP)
–
Displays the high side oil pressure measured at the compressor
bearing input.
Sump Oil
Pressure
(LOP)
– Displays the low side oil pressure measured at the sump.
Oil Pump
Run Output
(LED)
– Indicates whether the oil pump is operating.
YK-EP Style B Centrifugal Chiller82
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