Oil sump screen
Figure 46: 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 65: Display only fields
Field/LED name
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. See the explanation of auto-zeroing under
. 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
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.
Target Oil Temperature
Displays the desired oil temperature setpoint for the Oil Heater control. The Target
Setpoint is the Condenser Saturation Temperature plus 50°F with a minimum setpoint
of 110°F and a maximum of 160°F.
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 Sump Saturation Temp
Displays the Saturation Temperature of the Oil Sump.
Oil Heater (LED)
Indicates whether the oil heater output is energized.
Oil Return Solenoid (LED)
Illuminates when the Oil Return Solenoid output is energized.
Oil Pump Run Output (LED)
Illuminates when the Oil Pump Run output is energized.
Oil Pump Drive Command
Frequency (Variable Speed Oil Pump
Only)
Displays the actual speed command being sent to the VSOP. This value could be
the result of automatic control based on the Oil Pressure Setpoint, or the result of a
manual speed command.
77
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center