Johnson Controls YORK OPTIVIEW CONTROL CENTER, Operation Manual

Page: 66 / 142

JOHNSON CONTROLS
66
FORM 160.10-O1
ISSUE DATE: 4/27/2018
SECTION 2 - OPTIVIEW OPERATION
is increased, the shutdown threshold is 36.0°F (water)
or 6.0°F (brine) for the next ten (10) minutes. If Smart
Freeze is enabled, the threshold is 34.0°F for the next
ten minutes. After ten minutes have elapsed, the shut-
down threshold becomes the programmed setpoint
value.
Remote Analog Input Range
Access Level Required: OPERATOR
This setpoint defines the remote signal range applied
for remote reset of the leaving chilled liquid tempera-
ture setpoint and current limit setpoint in analog remote
mode. If the remote signal is 0-10VDC or 0-20mA, this
setpoint must be programmed for 0-10VDC. If the re-
mote signal is 2-10VDC or 4-20mA, this setpoint must
be programmed for 2-10VDC.
Local Motor Current Limit
Access Level Required: OPERATOR
Allows the maximum allowed motor current (as a
percentage of FLA) to be adjusted. When the motor
current reaches this value, the pre-rotation vanes will
not open further. If the motor current rises above this
value, the pre-rotation vanes will close to reduce cur-
rent to this setpoint. This value is adjustable from 30 to
100%, with 100% as the default setting.
Pulldown Demand Limit
Access Level Required: OPERATOR
This setpoint limits the motor current (programmed as
a percentage of FLA) during the specified pulldown
demand time. This value will override the motor cur-
rent limit value during this time period. This function is
used to provide energy savings following chiller start-
up and is adjustable from 30 to 100%, with 100% as
the default setting.
Pulldown Demand Time
Access Level Required: OPERATOR
This setpoint programs the period of time the pulldown
demand limit will be in effect after the chiller starts.
The pulldown demand time is adjustable from 0 to 255
minutes, with 0 minutes as the default.
Print
Access Level Required: VIEW
This function will generate a “Setpoints” print report.
Change Setpoint
Access Level Required: VIEW
Allows user to enter login password to change motor
settings. This button is only present at the “View” ac-
cess level.
NAVIGATION
Home
Access Level Required: VIEW
Returns the display to the Home screen.
Setup
Access Level Required: VIEW
Advances to the Setup sub-screen, allowing setup of
general system parameters.