York OPTIVIEW Operation Manual page 46

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
DISPLAY ONLY
Active Stall Voltage
Displays the Stall Detector output voltage (x.xxVdc),
as received by the Microboard, from the stall board.
Active Stall Voltage Type
Displays STANDARD or ENHANCED to indicate
whether the Active Stall Voltage has enhanced filtering
applied when necessary to normalize flow noise.
Active High Limit
Displays the present value of the stall voltage High
Limit to which the control compares the stall detector
voltage input to determine appropriate reaction with
the VGD. This limit varies according to drive speed
and suction conditions.
Active Low Limit
Displays the present value of stall voltage Low Limit
to which the control compares the stall detector voltage
input to determine appropriate reaction with the VGD.
This limit varies according to drive speed and suction
conditions.
Mach Number
Displays the compressor calculated mach number,
based on drive speeed and suction conditions.
VGD Closing (LED)
Illuminates when a close signal is being applied to the
VGD.
VGD Opening (LED)
Illuminates when an open signal is being applied to the
VGD.
VGD Position
Displays the position of the VGD over the range of 0%
(fully closed) to 100% (fully open). Displayed as XXX
until calibration procedure is performed by a qualified
Service technician.
Maximum VGD Position - Gas Path Revision
"A" Only
Displays calculated limit that the VGD is permitted to
open to in probing mode.
VGD Command - Gas Path Revision "B" Only
Displays the position command from the control to
the VGD.
46
Surge Detected (LED)
Illuminates for 5 seconds each time a surge is detected.
VGD Count
Displays the number of times the Stall Detector Board
output voltage goes above the High Limit setpoint. The
count can be cleared with in ADMIN access level us-
ing the VGD Cycle Count key on the VGD Setpoints
Screen.
VGD Time ( __Days __Hrs __Min __Sec)
Displays the accumulated time the Stall Detector Board
output voltage is greater than the High Limit Setpoint
while the chiller is running.
VGD Control State
Displays the current state of the VGD control. The
states are: Stall Waiting, Stall Reacting, Probing - Gas
Path A, Capacity Control - Gas Path B, Surge Reacting,
Surge Waiting, and Manual.
Time Remaining
While the VGD is in the Stall Waiting State, displays
the time remaining in the "Probe Wait Time" interval
(value programmed as the Probe Wait Time Setpoint).
Discharge Pressure
Displays the compressor discharge pressure as sensed
by the transducer used for the stall signal determina-
tion.
Condenser Pressure
Displays the condenser pressure sensed by the con-
denser shell transducer.
Head Pressure
Displays the resultant of the Condenser Pressure minus
the evaporator pressure.
Pre-Rotation Vanes Position - Gas Path
Revision "A" Only
Displays the position of the Pre-rotation vanes over
the range of 0% (fully closed) to 100% (fully open).
Displayed as XXX until calibration procedure is per-
formed by a qualified Service Technician.
FORM 160.78-O2
ISSUE DATE: 5/22/2017
JOHNSON CONTROLS