JOHNSON CONTROLS
54
FORM 160.78-O2
ISSUE DATE: 5/22/2017
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
DISPLAY ONLY
VGD Opening (LED)
Indicates the VGD is opening.
VGD Closing (LED)
Indicates the VGD is closing
VGD Feedback Voltage
Indicates the voltage from the VGD feedback potenti-
ometer.
VGD Actuator Control Mode
Indicates control status for the VGD actuator.
VGD Calibrated (LED)
Illuminated when calibration has been performed with
0% voltage < 100% voltage.
100% VGD Voltage
Indicates VGD feedback voltage accepted as the 100%
(full open) calibration value.
0% VGD Voltage
Indicates VGD feedback voltage accepted as the 0%
(full closed) calibration value.
PROGRAMMABLE
Set 100% VGD - Gas Path Revision “A” Only
Accepts the present VGD feedback voltage as the
100% calibration value.
Set 0% VGD - Gas Path Revision “A” Only
Accepts the present VGD feedback voltage as the 0%
calibration value.
Start Calibration - Gas Path Revision “B” Only
Initiates the automatic calibration process for the VGD
potentiometer in compressor Gas Path Revision “B”
configuration. See
YORK YMC
2
Service Manual (Form
160.78-M2)
for details of the process.
NAVIGATION
Home
Causes an instant return to the Home Screen.
VGD
Access Level Required: SERVICE
Causes an instant return to the Variable Geometry Dif-
fuser Screen.