JOHNSON CONTROLS
35
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
FORM 160.84-OM1
ISSUE DATE: 9/21/2017
3
Leaving Chilled Liquid Temperature Setpoints
– Remote Range
Displays the temperature range proportional to a re-
mote analog input used to reset the Leaving Chilled
Liquid temperature upward by this amount remotely.
Leaving Chilled Liquid Temperature Setpoints
(Shutdown) – Effective Offset
Displays the present value of the leaving chilled liquid
temperature shutdown offset in effect limited by the
chiller minimum temperature.
Leaving Chilled Liquid Temperature Setpoints
(Restart) – Offset
Displays the value set for leaving chilled liquid tem-
perature restart offset.
Evaporator Saturation Temperature
Displays the present saturation temperature in the
evaporator, determined from evaporator pressure.
Chilled Liquid Flow Switch (Open/Closed)
Displays whether the liquid flow switch input indicates
flow is present in the evaporator.
Chilled Liquid Pump
Displays the command presently sent by the control
center to the Chilled Liquid Pump run contacts (RUN
or STOP).
Evaporator Refrigerant Temperature
Displays the temperature of the refrigerant in the evap-
orator.
PROGRAMMABLE
Local Leaving Chilled Liquid Temperature -
Setpoint
Access Level Required: OPERATOR
This value allows the user to define the Leaving
Chilled Liquid Temperature that is to be maintained by
the chiller. It is programmable over the range of 38.0°F
to 70.0°F (water) or 10.0°F to 70.0°F (brine). If Smart
Freeze (see below) is enabled, the range is 36.0°F to
70.0°F (water).
When the chiller is running, performing capacity
control, any change to the LCHLT setpoint results
in a ramp from the old value to the new value at the
programmed LCHLT setpoint ramp rate.
Local Leaving Chilled Liquid Temperature -
Range
Access Level Required: OPERATOR
This is the range over which an analog or a digital sig-
nal (PWM) can reset the Leaving Chilled Liquid Tem-
perature setpoint above the operator programmed Base
Setpoint.
Leaving Chilled Liquid Temperature Cycling
Offset - Shutdown
Access Level Required: OPERATOR
This value allows the user to specify the Leaving
Chilled Liquid Temperature at which the chiller will
shut down on a LEAVING CHILLED LIQUID – LOW
TEMPERATURE cycling shutdown. This is done by
defining an offset below the Leaving Chilled Liquid
Temperature setpoint. It is programmable over a range
of 1°F to 64°F.
Leaving Chilled Liquid Temperature Cycling
Offset - Restart
Access Level Required: OPERATOR
This value allows the user to specify the Leaving
Chilled Liquid Temperature at which the chiller will
restart after a shutdown on a LEAVING CHILLED
LIQUID – LOW TEMPERATURE cycling shutdown.
This is done by defining an offset above the Leaving
Chilled Liquid Temperature setpoint. It is program-
mable over a range of 0°F to 70°F.
NAVIGATION
Home
Causes an instant return to the Home Screen.
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