Setpoints Screen; Figure 41 - Setpoints Screen - York YK Style H Operation Manual

FORM 160.76-O2
issue date: 6/15/2015

FIGURE 41 - SETPOINTS SCREEN

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 setpoint to which the chiller is
operating whether controlled remotely or locally. This
value could come from a 0 to 20 mA, 4 to 20mA, 0 to
10VDC or 2 to 10VDC input in Analog Remote mode,
PWM signal in Digital Remote mode, E-Link Gateway
interface in 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
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION

SETPOINTS SCREEN

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.
Current Limit Setpoint
Displays the active Current Limit Setpoint. In Local
mode, this is the locally programmed Current Limit
Setpoint. In ISN Remote mode, this is the setpoint re-
ceived from the E-Link Gateway interface. In Analog
Remote mode, this is the setpoint received via 0 to
10VDC, 2 to 10VDC, 0 to 20mA or 4 to 20mA input.
In Digital Remote mode, this is the Pulse width Modu-
lation signal input.
LD14342
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