JOHNSON CONTROLS
36
FORM 160.78-O2
ISSUE DATE: 5/22/2017
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
DISPLAY ONLY
Discharge Temperature
Displays the temperature of the refrigerant in its gas-
eous state at discharge of the compressor as it travels
to the condenser.
Discharge Superheat
Displays the Discharge superheat, calculated as (Dis-
charge Temperature – Condenser Saturation tempera-
ture).
PRV Opening (LED) - Gas Path Revision "A"
Only
Indicates whether the output control is commanding
the PRV's to open.
PRV Closing (LED) - Gas Path Revision "A"
Only
Indicates whether the output control is commanding
the PRV's to close.
Motor Run (LED)
Indicates ON when the digital output run command to
the VSD is on.
Pre-Rotation Vane Command Position - Gas
Path Revision "A" Only
Displays the control output position command to the
PRV as a percentage between 0 and 100%.
Pre-Rotation Vanes Position - Gas Path
Revision "A" Only
This value displays the present position of the pre-rota-
tion vanes as a percentage between 0 and 100%.
Input % Full Load Amps
Displays the chiller current as a percentage of the job
input Full Load Amps (FLA) value.
Motor % Full Load Amps
Displays the current to the motor as a percentage of the
motor maximum current.
VSD Output Frequency
Displays the VSD frequency.
PROGRAMMABLE
There are no programmable fields on this screen.
NAVIGATION
Home
Causes an instant return to the Home Screen.
Capacity Control
Access Level Required: SERVICE
Causes an instant transfer to the Capacity Control
Screen.
MBC
Access Level Required: SERVICE
Moves to the subscreen allowing view of the Magnetic
Bearing Controller parameters and event log. Service
Technicians refer to
YORK YMC
2
Service Manual
(Form 160.78-M2)
.
Surge
Access Level Required: VIEW
Moves to the subscreen that allows viewing and pro-
gramming of the Surge Protection feature. Service
Technicians refer to
YORK YMC
2
Service Manual
(Form 160.78-M2).
VGD
Access Level Required: VIEW
Moves to the subscreen that allows viewing and pro-
gramming of the Variable Geometry Diffuser feature.
Programming requires an access level of SERVICE.
PRV Calibrate - Gas Path
Revision "A" Only
Access Level Required: SERVICE
Only available if the chiller is stopped. Moves to the
subscreen allowing calibration of the Pre-rotation
vanes. Service Technicians refer to
YORK YMC
2
Ser-
vice Manual (Form 160.78-M2).
