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Oil sump screen
Figure 25: Oil sump screen
This screen displays a close-up of the chiller oil sump with pertinent oil system status, pressures
and temperatures. This screen also serves as a gateway to subscreens that allow programming of
setpoints for the Variable Speed Oil Pumps for compressor #1 and #2.
Table 58: Display only fields
Field/LED name
Oil heater (LED)
System oil return solenoid (LED)
Oil sump temperature
Sump oil pressure (LOP)
Oil pump 1: Oil pump run output
(LED)
Oil pump 1: Pump oil pressure
(HOP)
Oil pump 1: Oil pressure
Oil pump 1: Oil pump drive
command frequency
Oil pump 1: Setpoint or target oil
pressure
Oil pump 1: Pulldown time
remaining
72
Description
Lights when the oil heater output is energized.
Lights when the oil solenoid output is energized.
Displays the temperature of the oil in the sump.
Displays the low side oil pressure measured at the sump.
Illuminates when compressor #1 Variable Speed Oil Pump is being commanded to
run.
Displays the high side oil pressure measured at the compressor #1 bearing input.
Displays the pressure differential between the Pump oil pressure (HOP) transducer
for compressor #1 and the common Sump oil pressure (LOP) transducer. If this
compressor is the lead compressor, includes offset pressure derived from auto-
zeroing during the compressor #1 pre-lube. However, if compressor #2 is the lead
compressor, this value includes offset pressure derived from auto-zeroing during
compressor #2 Pre-lube (refer to auto-zeroing explanation under the Compressor
Screen). If either transducer used to calculate this differential is out of range, the
display field will show XX.X.
Displays the speed command applied to compressor #1 Variable Speed Oil Pump.
Displays the oil pressure setpoint that compressor #1 Variable Speed Oil Pump is
controlling to. During the pre-lube and for the first 15 seconds of System Run, this is
the target Setpoint, and is fixed at 45.0 PSID. For the remainder of compressor #1 run,
it is the programmed Setpoint Oil Pressure.
Displays the time remaining until the user programmed Setpoint Oil Pressure is used.
While this clock is decrementing, the Target Oil Pressure Setpoint (fixed at 45.0 psid) is
in effect.
Model YD Mod D with OptiView Control Center
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