York YK-EP Operation And Maintenance Manual page 31

Table 13: Display only fields
Field/LED name
Leaving Chilled Liquid
Temperature Setpoints –
Setpoint
Leaving Chilled Liquid
Temperature Setpoints –
Shutdown
Leaving Chilled Liquid
Temperature Setpoints –
Restart
Table 14: Programmable
Button Access level
Smart Freeze
Service
(Off / On)
Brine Low
Evaporator Service
Cutout
Refrigerant
(Enabled / Service
Disabled)
Local Leaving
Chilled Liquid
Operator
Temperature
– Range
YK-EP Style B Centrifugal Chiller
Description
Displays the present setpoint to which the chiller is operating,
whether controlled locally or remotely.
Displays the Leaving Chilled Liquid Temperature at which the chiller
will shutdown on Leaving Chilled Liquid – Low Temperature. This
temperature is entered as an offset with the Leaving Chilled Liquid
Temperature Cycling Offset – Shutdown Setpoint below. Although
the offset setpoint is changed manually, the offset being used
can change automatically to prevent the Leaving Chilled Liquid
Temperature from going below the minimum allowed value: 36°F
(water), 34°F (water with smart freeze enabled) or 6°F (brine). The
offset being used is displayed as Effective Offset.
Displays the Leaving Chilled Liquid Temperature at which the chiller
will restart after it has shutdown on LEAVING CHILLED LIQUID –
LOW TEMPERATURE cycling shutdown. This temperature is set as an
offset using the Leaving Chilled Liquid Temperature Cycling Offset –
Restart Setpoint, displayed as OFFSET adjacent to this value.
Description
This value is only available if the chiller is not in Brine mode. It
allows the user to enable the Smart Freeze Point Operation which
allows the chiller to run closer to the freeze point without shutting
down.
This value is only available in Brine mode. It allows the user to
specify the Evaporator Pressure at which a safety shutdown is
initiated.
When an Evaporator Refrigerant Sensor has been installed it must
be enabled via this toggle before the system will utilize the new,
enhanced resolution input.
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 Remote mode can reset the Leaving Chilled Liquid
Temperature Setpoint above the operator programmed BASE
Setpoint. Programmable as 10, 20, 30 or 40°F. It is added to the BASE
value to create a range over which the remote device 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 Leaving Chilled Liquid Temperature Setpoint over the range
of 45.0° to 55.0°F.
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