Setpoints screen
Figure 60: Setpoints screen
This screen provides a convenient location for programming 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.
Table 110: Display only fields
Field/LED name
Description
Leaving Chilled Liquid Temperature
– Setpoint
Displays the present setpoint to which the chiller is operating whether controlled
remotely or locally. This setpoint could come from a 4 mA to 20 mA input, 0 VDC to 10
VDC input, a PWM signal, SC-EQ communications interface in BAS 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 overcooling the building. This value is calculated by subtracting the Leaving
Chilled Liquid Temperature Cycling Offset – Shutdown from the Leaving Chilled
Liquid Temperature – 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
Displays the active current limit setpoints expressed as a percentage of FLA.
Note:
For fields requiring access level of SERVICE. Service Technicians refer to the
OptiView
Control Center - Service Instructions (Form 160.76-M1)
for operation instructions and explanation
of all programmable setpoints and displayed values.
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center
114