JOHNSON CONTROLS
61
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
FORM 160.84-OM1
ISSUE DATE: 9/21/2017
3
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 is enabled, the range is 36.0°F to 70.0°F (wa-
ter).
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 shut-
down. This is done by defining an offset above the
Leaving Chilled Liquid Temperature setpoint. It is pro-
grammable over a range of 0°F to 70°F.
Remote Analog Input Range
Access Level Required: OPERATOR
This setpoint defines, for the control center, the re-
mote signal range applied for remote reset of the Leav-
ing Chilled Liquid temperature Setpoint and Current
Limit Setpoint in ANALOG remote mode. If the re-
mote signal is 0-10VDC or 0-20mA, this setpoint must
be programmed for 0-10VDC. If the remote signal
is 2-10VDC or 4-20mA, this setpoint must be pro-
grammed for 2-10VDC.
Local Input Current Limit
Access Level Required: OPERATOR
Allows the user to specify the maximum allowed chill-
er input current (as a percentage of FLA). When the
chiller input current reaches this value, the input cur-
rent override takes effect.
Pulldown Demand Limit
Access Level Required: OPERATOR
Allows the user to specify the current limit value (as
a percentage of Full Load Amps) to which the chiller
will be limited during the specified pulldown limit
time. This value will override the Input Current Limit
value during this time period. This function is used
to provide energy savings following chiller start-up.
Pulldown demand limit is ignored in BAS (ISN) con-
trol source because the BAS system is expected to use
its algorithms to reset current limit as required in that
operating mode.
Pulldown Demand Time
Access Level Required: OPERATOR
Allows the user to set a period of time for which the
pulldown demand limit will be in effect after the chiller
starts.
Print
Generates Setpoints print report.
NAVIGATION
Home
Causes an instant return to the Home Screen.
Setup
Moves to the subscreen allowing setup of general sys-
tem parameters.
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