JOHNSON CONTROLS
102
FORM 160.54-O1
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 sub-screen for dening the setup of general system
parameters.
DISPLAY ONLY
Leaving Chilled Liquid Temperature - Setpoint
Displays the present setpoint to which the chiller is oper-
ating 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, MicroGateway 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-cooling
the building. This value is calculated by subtracting the
Leaving Chilled Liquid Temperature Cycling Offset
– Shutdown from the Leaving Chilled Liquid Tem-
perature – Setpoint. If this value is below the absolute
minimum allowed shutdown temperature the minimum
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 Cycling Offset
– Restart to the Leaving Chilled Liquid Temperature
– Setpoint.
Current Limit Setpoint
(Flash Memory Card version C.MLM.01.01 or later)
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 MicroGateway interface. In Analog re-
mote mode, this is the setpoint received via 0-10VDC,
2-10VDC, 0-20mA or 4-20mA input. In Digital remote
mode, this is the Pulse width Modulation signal input.
LD14342
FIG. 26
OptiView Control Center
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