York YR Manual page 28

Optiview Control Center
SECTION 2 - OPTIVIEW™ CONTROL CENTER
to make ice at a faster rate as explained in the "Opera-
tion" section. The water cooling setpoint range is 38°F
to 70°F. The Brine cooling setpoint range is 20°F to
70°F and the default is 45°F. When in Brine mode and
Ice Storage mode is ON, it is automatically activated
and deactivated by the setpoint that is entered:
• At 20°F to 32°F Ice Storage mode is activated.
• More than 32°F to 70°F deactivates Ice Storage
mode.
This allows the chiller to be switched in and out of Ice
Storage mode (when in Brine mode and ice storage is
ON) by locally or remotely changing this setpoint.
Leaving Chilled Liquid Temperature Setpoints
– Remote Range
Displays the present maximum range above the Leaving
Chilled Liquid Temperature setpoint that this setpoint
can be remotely changed to. This is the Local Leaving
Chilled Liquid Temperature - Range setpoint (See the
description in the following section of programmable
setpoints).
Leaving Chilled Liquid Temperature Setpoints
– Shutdown
Displays the Leaving Chilled Liquid Temperature at
which the chiller will shut down to avoid over-cooling
the building. By default this value is 4°F below the
Leaving Chilled setpoint. The displayed value is the
difference between the present Leaving Chilled Liquid
Temperature setpoint and the setpoint entered for the
Leaving Chilled Liquid Temperature Cycling Offset –
Shutdown.
Leaving Chilled Liquid Temperature Setpoints
– Shutdown Offset
Displays the offset below the Leaving Chilled Liquid
Temperature setpoint at which the chiller will shutdown
to avoid over-cooling. This is the Leaving Chilled Liq-
uid Temperature Cycling – Shutdown setpoint (See the
description in the following section of programmable
setpoints).
Leaving Chilled Liquid Temperature Setpoints
– Restart
Displays the Leaving Chilled Liquid Temperature at
which the chiller will restart after it has shut down to
avoid over-cooling. By default, the chiller will restart at
the Leaving Chilled Liquid Temperature setpoint. The
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displayed value is the difference between the present
Leaving Chilled Liquid Temperature setpoint and the
setpoint entered for the Leaving Chilled Liquid Tem-
perature Cycling Offset - Restart. If Ice Storage is ON
and the Leaving Chilled Liquid Temperature setpoint is
less than or equal to 32.0ºF, the Restart Temperature is
the value programmed as the Ice Storage Restart Tem-
perature.
Leaving Chilled Liquid Temperature Setpoints
– Restart Offset
Displays the offset above the Leaving Chilled Liquid
Temperature setpoint at which the chiller will restart
after it has shut down to avoid over-cooling. This is the
Leaving Chilled Liquid Temperature Cycling - Restart
setpoint (See the description in the following section of
programmable setpoints). If Ice Storage is ON and the
Leaving Chilled Liquid Temperature setpoint is less
than or equal to 32.0ºF, the Restart Offset is the value
programmed as the Ice Storage Restart Offset.
Ice Storage Active (LED)
Illuminates when Ice Storage mode is active. It is ac-
tive when Ice Storage mode has been turned ON and
the Leaving Chilled Liquid Temperature setpoint is set
to less than or equal to 32.0°F. Extinguished when Ice
Storage mode is turned ON but not Active. It is not
active when the Leaving Chilled Liquid Temperature
setpoint is more than 32.0°F. If Ice Storage mode is
turned OFF, this indicator is not displayed.
Programmable
Local Leaving Chilled Liquid Temperature –
Range
Access Level Required: OPERATOR
This is the range over which an analog (0 to 20mA,
4 to 20mA, 0 to 10VDC or 2 to 10VDC) in Analog
Remote mode or a digital signal (PWM) in Digital Re-
mote mode can reset the Leaving Chilled Liquid Tem-
perature setpoint above the operator programmed Base
setpoint (see below). Programmable as either 10, 20,
30, or 40°F, with a default of 10°F, it is added to the
Base value to create a range over which the remote de-
vice can reset the setpoint. For example, if this setpoint
is programmed for 10°F and the operator programmed
value is 45°F, then the remote device can set the Leav-
ing Chilled Liquid Temperature setpoint over the range
45.0° to 55.0°F.
FORM 160.81-O1 (1020)
ISSUE DATE 10/05/2020
JOHNSON CONTROLS