York YST Operation Manual page 59

FORM 160.67-O1
ISSUE DATE: 4/1/2015
pre-rotation vanes
Displays the present control signal being sent to the
PRV positioning logic used to control the Open/Close
digital outputs connected to the PRV actuator. The data
field below the output display shows the Auto/Manual
status of the Pre-Rotation Vanes as presently selected
on the Auto/Manual Screen.
prograMMable
none
navigaTion
home
Access Level Required: VIEW
Causes an instant return to the Home Screen.
pid Setup 1
Access Level Required: VIEW
Moves to a sub-screen that allows programming
of the tuning parameters for the Leaving Chilled
Liquid Temperature, Evaporator Pressure, Condenser
Pressure, Hotwell Level, and Subcooler Level PID
controllers.
pid Setup 2
Access Level Required: VIEW
Moves to a sub-screen that allows programming of
the tuning parameters for the Governor (Slow Roll),
Governor (Min Rated), Governor (Rated), Governor
Valve Position Limit, Horsepower Limit PID
controllers.
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
auto/Manual
Access Level Required: SERVICE
Moves to a sub-screen that allows the operator to
manually control any of the capacity control devices.
The programmable Anti-Surge limits are also accessible
from this screen.
Setpoints
Access Level Required: VIEW
Moves to a sub-screen that allows programming of
various parameters pertinent to the operation of the
capacity controls. It is also the gateway to Capacity
Control Setpoints Screen 2.
2
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