VSD tuning screen
Figure 26: VSD tuning screen
This screen applies to both Variable Speed Drives (VSD) and Medium Voltage Variable Speed Drives
(MVVSD). It displays a cutaway view of the chiller compressor, revealing the Pre-Rotation Vanes.
Animation of the Pre-Rotation Vanes indicates their position. In addition, this screen allows manual
control of the vanes and manual control of the Command Frequency being sent to drive.
Note: Requires a login access level of SERVICE.
Table 65: Display only
Field/LED name Description
Output Frequency
Displays the frequency at which the drive is operating the motor.
This value is returned from the drive.
Pre-Rotation Vanes Position
Displays the position of the Pre-Rotation Vanes in percent over the
range of 0% (full close) to 100% (full open).
Delta P/P
Displays the chiller head pressure calculated as (condenser pressure
- evaporator pressure/evaporator pressure).
Temperature Differential
(LCHLT – Setpoint)
Displays the difference between the Leaving Chilled Liquid
Temperature and the Leaving Chilled Liquid Temperature Setpoint.
Frequency Control Mode
Displays whether the Command Frequency to the drive is derived
from manual or automatic frequency control mode.
Command Frequency
When equipped with a VSD or equipped with a MVVSD, this is the
speed command being sent to the Drive Logic Board in either Auto
or Manual Speed Control mode.
% Full Load Amps
Displays the motor current as a percentage of chiller Full Load
Amps.
YK-EP Style B Centrifugal Chiller76
To Next Page
Loading...
Need help?
General