Table 48: Display only fields
Field/LED name
Description
Delta T
Displays the difference between the temperature of the chilled liquid leaving the
evaporator and the Leaving Chilled Liquid Active Setpoint.
Control state
Displays the present source controlling the command to the capacity control devices,
based on conditions as follows:
•
Inactive - Capacity Control is not active.
•
Temperature Control - Capacity Control is active with no overrides acting.
•
Input Current - Input Current Override is in control.
•
Motor Current - Motor Current Override is in control.
•
Condenser Pressure - Condenser Pressure Override is in control.
•
Evaporator Pressure - Evaporator Pressure Override is in control.
•
Low LCHLT - LCHLT low temperature Override is in control.
Load limit
Displays if any load limiting control is acting on the temperature control output to the
capacity control devices. The field indicates the following:
•
Inactive - capacity control is not active
•
None - no limit is in effect
•
Input current
•
Motor current
•
Condenser pressure
•
Evaporator pressure
Head pressure
Displays the difference between condenser refrigerant pressure and evaporator
refrigerant pressure.
Lead compressor
Displays which compressor is lead.
Capacity control output devices
Displays the following for each of the devices that is available: VSD (Variable Speed
Drive if installed), VGD (Variable Geometry Diffuser) or HGBP (Hot Gas Bypass Valve if
installed):
•
Active Output (LED): Indicates which device is currently selected by the control
for manipulation.
•
Command: Displays the output command from the control to the device in Hertz
to the VSD or in percent of full open to the VGD or HGBP valve.
•
Feedback: Displays the present speed feedback from the VSD or present
position feedback from the VGD.
•
Active Min: Displays the prevailing minimum value to which the control to the
device is limited, based upon surge controls or operating limits.
•
Control Mode: Displays whether the device is under Automatic or Manual
control or inactive.
Lag PRV position
Displays the Pre-Rotation Vane position of the Lag compressor.
Table 49: Programmable
Button
Description
Select PRV control
Sets the PRV to be manually controlled.
Select HGBP control
Sets the Hot Gas Bypass to be manually controlled.
Manual increment
Sets the percentage amount that the PRV or HGBP will move with each press of the
Manual Increase or Decrease button (adjustable between 0.1% and 10%).
Increase
Opens the selected PRV or HGBP with each press by the amount set in the Manual
Increment setting.
Decrease
Closes the selected PRV or HGBP with each press by the amount set in the Manual
Increment setting.
Set
Allows the service technician to set the selected PRV or HGBP to a desired position
between 05 and 100% for testing.
Auto
Returns the manually controlled PRV or HGBP back to Automatic program control.
63
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...
