York YST, Operation Manual

Page: 95 / 164

JOHNSON CONTROLS
95
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
FORM 160.67-O1
ISSUE DATE: 4/1/2015
2
TiMe delaY alarM/ShuTdoWn SeTpoinTS SCreen
LD09277
figure 36 - TiMe delaY alarM/ShuTdoWn SeTpoinTS SCreen
noTe: OptiView
™
Control Center Screens shown may NOT represent the exact screens according to the software version utilized.
overvieW
This screen allows programming of the time delays for
various Alarm and Shutdown conditions primarily as-
sociated with the protection of the turbine and steam
condenser. To view the graphics associated with the
setpoint, the applicable Screen name is also referenced.
All setpoints require a login access level of Service or
higher.
prograMMable
TdSp1 – excessive Slow roll Timeout
Screen: Steam System
Range: 0-2700 Sec Default: 1200 Sec
An immediate shutdown is initiated if the turbine has
been slow rolling longer than the calculated slow roll
warm-up time plus this delay.
TdSp7 - Turbine exhaust high pressure
Timeout
Screen: Steam System
Range: 0-1800 Sec Default: 600 Sec
An immediate shutdown is initiated if the input signal
from the Turbine Exhaust Steam Pressure Transmitter
remains continuously above the PSP7-Turbine Exhaust
Steam High Pressure Shutdown setpoint shown on the
Alarm/Shutdown Setpoints Screen for this delay after
the chiller is in the "System Run" mode.
TdSp8 – excessive Start delay Timeout
Screen: Steam System
Range: 0-2700 Sec Default: 1200 Sec
An immediate shutdown is initiated if the system
prelube has been completed but the operator has failed
to press the Begin Slow Roll key on the Steam System
Screen to initiate the slow roll warm-up within this de-
lay.
TdSp13 – hotwell high level Timeout
Screen: Condensate
Range: 0-60 Sec Default: 10 Sec
An immediate shutdown is initiated if the Hotwell Lev-
el Transmitter input signal remains continuously above
the HLSP2 – Hotwell High Level Shutdown shown
on the Alarm/Shutdown Setpoints Screen or the steam
condenser hotwell high-level switch input to the York
I/O board has been continuously open for this delay.
TdSp15 – Turbine Mechanical Trip Timeout
Screen: Turbine
Range: 5-2400 Sec Default: 10 Sec