Oil Sump Screen; Figure 27 - Oil Sump Screen - York YK Style H Operation Manual

FORM 160.76-O2
issue date: 6/15/2015

FIGURE 27 - OIL SUMP SCREEN

OVERVIEW
This screen displays a close-up of the chiller oil sump
and provides all the necessary setpoints for maintain-
ing the Variable Speed Oil Pump (VSOP). In addition,
this screen allows manual control of the frequency
command sent to the VSOP.
DISPLAY ONLY
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 under the Compressor
Screen on Page 47). 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.
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION

OIL SUMP SCREEN

Oil – Saturated Condenser Temperature
Differential
Displays the difference between the Oil Sump Temper-
ature and the Saturated Condenser Temperature. This
parameter is useful when analyzing oil heater opera-
tion 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.
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 being commanded
to operate.
Oil Return Solenoid (LED)
Indicates whether the solenoid is energized.
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