York YK-EP, Operation And Maintenance Manual

Page: 79 / 268

Oil sump screen
Figure 27: Oil sump screen
This screen displays a close-up of the chiller oil sump and provides all the necessary setpoints for
maintaining the Variable Speed Oil Pump (VSOP). In addition, this screen allows manual control of
the frequency command sent to the VSOP.
Table 68: Display only
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.
Oil –
Saturated
Condenser
Temperature
Differential
–
(Variable Speed Oil Pump Only) Displays the difference between the
Oil Sump Temperature and the Saturated Condenser Temperature.
This parameter is useful when analyzing oil heater operation since it
is used in the control of the oil heater.
Pump Oil
Pressure
(HOP)
–
Displays the high side oil pressure measured at the compressor
bearing input.
79 YK-EP Style B Centrifugal Chiller