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FORM 160.72-O1 (810)
figure 22 -
SETUP SCREEN
overvieW
This screen provides a convenient location for pro-
gramming the most common setpoints involved in the
chiller control.
displaY onlY
leaving Chilled liquid Temperature
Displays the present setpoint to which the chiller 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 sig-
nal in Digital Remote mode, remote 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 Off-
set - 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.
JOHNSON CONTROLS
seTup sCreen
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.
prograMMaBle
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 (see
below) is enabled, the range is 36.0°F to 70.0°F (water).
A remote device can provide an analog signal (0-20mA
or 4-20mA, 0-10VDC or 2-10VDC) in Analog Remote
mode or PWM signal in Digital Remote mode that chang-
es the setpoint by creating an offset above the operator
programmed Base Leaving Chilled Liquid Temperature
setpoint. This offset may be defined up to 10.0°F or 20.0°F
above the Base setpoint (see the Remote Leaving Chilled
3
61
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