Setpoints screen
Figure 35: Setpoints screen
This screen provides a convenient location for programming the most common setpoints involved
in the chiller control. It also serves as a gateway to a subscreen for defining the setup of general
system parameters.
Table 83: 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 value could come from:
•
0-20 mA, 4-20 mA, 0-10 VDC or 2-10 VDC input in Analog Remote mode
•
PWM signal in Digital Remote mode
•
SC-EQ communications interface in ISN (BAS) mode
•
A locally programmed value
Leaving chilled liquid
temperature: Remote
range
Displays the Remote Range, which is set by the Local Leaving Chilled Liquid Temperature Range
setpoint. It is a value between 10ºF and 40ºF added to the Local LCHLT Setpoint defining the
maximum Remote LCHLT setpoint.
Leaving chilled liquid
temperature cycling:
Shutdown
Displays the Leaving Chilled Liquid Temperature at which the chiller shuts down to avoid over-
cooling the building. This value is calculated by subtracting the Leaving Chilled Liquid Temperature
Cycling Shutdown Offset 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 restarts after it has shut down
due to cycling off on low water temperature. This value is calculated by adding the Leaving Chilled
Liquid Temperature Cycling Restart Offset to the Leaving Chilled Liquid Temperature Setpoint.
Chiller current limit
setpoint
Displays the current limit that is in effect during the Chiller Steady State period (this period is in
effect after the Chiller Pulldown Period is no longer in effect). The Chiller Current Limit setpoint can
be from a 0-20 mA, 4-20 mA, 0-10 VDC, or 2-10 VDC input in Analog remote mode, or PWM input
in Digital remote mode, or SC-EQ communication interface in ISN (BAS) remote mode, or a Local
Chiller Limit setpoint entered at the keypad. The Chiller Pulldown Period is in effect when the chiller
enters “System Run” until the Leaving Chilled Liquid Temperature is within 2ºF of the Leaving
Chilled Liquid Temperature setpoint. During this period, the Chiller Pulldown Demand Limit
setpoint is in effect. The Chiller Current Limit setpoint is in effect for the remainder of “System
Run”.
93
Model YD Mod D with OptiView Control Center
Summary of Contents for YD Mod D
Page 2: ...2 Model YD Mod D with OptiView Control Center...
Page 8: ...Nomenclature Model YD Mod D with OptiView Control Center 8...
Page 17: ...Figure 2 Chiller operation flow chart 17 Model YD Mod D with OptiView Control Center...
Page 18: ...Figure 2 Chiller operation flow chart Model YD Mod D with OptiView Control Center 18...
Page 19: ...Figure 2 Chiller operation flow chart 19 Model YD Mod D with OptiView Control Center...
Page 20: ...Figure 2 Chiller operation flow chart Model YD Mod D with OptiView Control Center 20...
Page 21: ...Figure 2 Chiller operation flow chart 21 Model YD Mod D with OptiView Control Center...
Page 22: ...Figure 2 Chiller operation flow chart Model YD Mod D with OptiView Control Center 22...
Page 150: ...Figure 57 Sample printout status Model YD Mod D with OptiView Control Center 150...
Page 151: ...Figure 57 Sample printout status 151 Model YD Mod D with OptiView Control Center...
Page 152: ...Figure 58 Sample printout setpoints Model YD Mod D with OptiView Control Center 152...
Page 153: ...Figure 58 Sample printout setpoints 153 Model YD Mod D with OptiView Control Center...
Page 154: ...Figure 59 Sample printout schedule Model YD Mod D with OptiView Control Center 154...
Page 155: ...Figure 60 Sample printout sales order 155 Model YD Mod D with OptiView Control Center...
Page 156: ...Figure 61 Sample printout history Model YD Mod D with OptiView Control Center 156...
Page 157: ...Figure 61 Sample printout history 157 Model YD Mod D with OptiView Control Center...
Page 159: ...Figure 64 Sample printout custom screen report 159 Model YD Mod D with OptiView Control Center...