York YST User Manual

JOHNSON CONTROLS
59
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
FORM 160.67-O1
ISSUE DATE: 4/1/2015
2
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.
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.

York YST Specifications

General

Brand	York
Model	YST
Category	Chiller
Language	English