JOHNSON CONTROLS
40
FORM 160.81-O1 (1020)
ISSUE DATE 10/05/2020
SECTION 2 - OPTIVIEW™ CONTROL CENTER
Optiview Control Center
OIL SEPARATOR SCREEN
Overview
This screen displays a close-up of the chiller oil sump
and provides all the necessary setpoints for maintain-
ing the oil.
Display Only
Discharge Temperature
Displays the temperature of the refrigerant in its gas-
eous state at discharge of the compressor as it travels
to the Oil Separator.
Discharge Superheat
In software versions C.MLM.05.04.xxx (and later),
displayed value is Discharge Temperature minus Dis-
charge Saturation Temperature. Discharge Saturation
Temperature is not a displayed value. In earlier ver-
sions, it is Discharge Temperature minus Condenser
Saturation Temperature.
Oil Pressure
Displays the pressure of the oil at the input to the com-
pressor.
Discharge Pressure
Displays the pressure at the discharge of the compressor.
Differential Oil Pressure
Displays the pressure differential between the oil pres-
sure (as sensed at the input to the compressor) and the
evaporator pressure. If either of the transducers used
to calculate this differential is out of range, the display
field will show XX.X. The displayed value includes
the offset pressure that is derived during the first 15
seconds of “Start Sequence Initiated” (Refer to the fol-
lowing explanation of offset pressure).
Differential Oil Pressure = (Oil Pressure – Evaporator
Pressure) ± Offset Pressure
Differential Filter Pressure
Displays the pressure differential between the input to
the oil filter (Discharge Pressure) and the input to the
compressor. This value is used to check for filter clog-
ging. If either of the transducers used to calculate this
differential is out of range, the display field will show
XX.X. The displayed value includes the offset pressure
that is derived during the first 15 seconds of “Start Se-
quence Initiated”. (Refer to the following explanation
of offset pressure).
Differential Filter Pressure = (Discharge Pressure – Oil
Pressure) ± Offset Pressure
FIGURE 12 - OIL SEPARATOR SCREEN
LD12825
