JOHNSON CONTROLS
73
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
FORM 160.78-O2
ISSUE DATE: 5/22/2017
2
OVERVIEW
This screen provides a convenient location for pro-
gramming the most common setpoints involved in the
chiller control. This screen also serves as a gateway to
a subscreen for defining the setup of general system
parameters.
DISPLAY ONLY
Leaving Chilled Liquid Temperature - Setpoint
Displays the present Active setpoint to which the chill-
er is operating whether controlled remotely or locally.
This value could come from a 0-20 mA, 4-20 mA,
0-10VDC or 2-10VDC input in Analog Remote mode,
PWM signal in Digital Remote mode, E-Link Gateway
interface in BAS (ISN) mode, or a locally programmed
value.
Leaving Chilled Liquid Temperature Cycling -
Shutdown
Displays the Leaving Chilled Liquid Temperature at
which the chiller will shut down to avoid over-cool-
ing the building. This value is calculated by subtract-
ing the Leaving Chilled Liquid Temperature Cycling
Offset – Shutdown from the Leaving Chilled Liquid
Temperature – Setpoint. If this value is below the abso-
lute minimum allowed shutdown temperature the mini-
mum value is displayed.
Leaving Chilled Liquid Temperature Cycling –
Restart
Displays the Leaving Chilled Liquid Temperature at
which the chiller will restart after it has shut down due
to over-cooling temperature. This value is calculated
by adding the Leaving Chilled Liquid Temperature Cy-
cling Offset – Restart to the Leaving Chilled Liquid
Temperature – Setpoint.
Input Current Limit Setpoint
Displays the active Input Current Limit setpoint. This
is the minimum of the locally or remote (received via
0-10VDC, 2-10VDC, 0-20mA or 4-20mA input or
PWM) programmed Current Limit setpoint or pulldown
limit. In BAS (ISN) remote mode, the remote setpoint
is received from the E-Link Gateway interface.
SETPOINTS SCREEN
LD14860a
FIGURE 32 -
SETPOINTS SCREEN
