York YST, Operation Manual, Page: 113 / 164

JOHNSON CONTROLS
113
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
FORM 160.67-O1
ISSUE DATE: 4/1/2015
2
rrSp7 – Main Steam inlet block valve
Screen: Steam System
Range: 1-100 %/Sec Default: 5 % RPM/Sec
This is only used if MSSP4-Turbine Start Mode is set
for Auto on Configuration Screen 1. It is the rate that
the control signal being sent to the analog output con-
trolling the Main Steam Inlet Block Valve is increased
from 0-100% after the ramp-to-rated speed is initiated
and decreased prior to unloading the chiller after a soft
shutdown is initiated.
Change Setpoints
Access Level Required: SERVICE
This key enables the field selection cursor. The opera-
tor may then toggle between the programmable data
fields using the Cursor Arrow keys.
navigaTion
home
Access Level Required: VIEW
Causes an instant return to the Home Screen.
Setpoints
Access Level Required:
VIEW
Causes an instant return to the Setpoints Screen.
Configuration Setpoints
Access Level Required:
VIEW
Causes an instant return to the Configuration Setpoints
Screen 1.
pressure Setpoints
Access Level Required: VIEW
Moves to a sub-screen that allows programming of
various pressure thresholds pertaining to the operation
of the chiller.
Time Setpoints
Access Level Required: VIEW
Moves to a sub-screen that allows programming of
various time delays pertaining to the operation of the
chiller.