York YST Operation Manual page 145

FORM 160.67-O1
ISSUE DATE: 4/1/2015
Setpoints Screen. The chiller can only be started after
the transmitter input signal decreases to 0.1 °F below
the Shutdown Setpoint and the START/STOP control
switch is placed in the STOP-RESET (O) position.
" Turbine – Shaft end brg Temperature out of
range"
This message only applies to when the turbine is sup-
plied with bearing RTD sensors and MSSP14-Turbine
Bearing Temperature Sensors is set for Enabled on
the Configuration Screen 1. It appears when the input
signal from the Turbine Shaft End Bearing RTD Tem-
perature Transmitter is below 32 °F. This is outside the
normal operating range and generally indicates a de-
fective transmitter or RTD sensing element. The chiller
can only be started after the transmitter input is indicat-
ing a temperature that is within range and the START/
STOP control switch is placed in the STOP-RESET
(O) position.
" Turbine – governor end brg Temperature
out of range"
This message only applies to when the turbine is sup-
plied with bearing RTD sensors and MSSP14-Turbine
Bearing Temperature Sensors is set for Enabled on
the Configuration Screen 1. It appears when the input
signal from the Turbine Governor End Bearing RTD
Temperature Transmitter is below 32 °F. This is out-
side the normal operating range and generally indicates
a defective transmitter or RTD sensing element. The
chiller can only be started after the transmitter input
is indicating a temperature that is within range and the
START/STOP control switch is placed in the STOP-
RESET (O) position.
" Turbine – Shaft end bearing high
Temperature"
This message only applies to when the turbine is sup-
plied with bearing RTD sensors and MSSP14-Turbine
Bearing Temperature Sensors is set for Enabled on
the Configuration Screen 1. It appears when the in-
put signal from the Turbine Shaft End Bearing RTD
Temperature Transmitter is above the TSP5-Turbine
Shaft End Brg High Temp shutdown setpoint shown
on the Alarm/Shutdown Setpoints Screen. The chiller
can only be started after the transmitter input signal de-
creases to 0.1 °F below the Shutdown Setpoint and the
START/STOP control switch is placed in the STOP-
RESET (O) position.
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
" Turbine – governor end bearing high
Temperature"
This message only applies to when the turbine is sup-
plied with bearing RTD sensors and MSSP14-Turbine
Bearing Temperature Sensors is set for Enabled on the
Configuration Screen 1. It appears when the input sig-
nal from the Turbine Governor End Bearing RTD Tem-
perature Transmitter is above the TSP7-Turbine Gov-
ernor End Brg High Temp Shutdown setpoint shown
on the Alarm/Shutdown Setpoints Screen. The chiller
can only be started after the transmitter input signal de-
creases to 0.1 °F below the Shutdown Setpoint and the
START/STOP control switch is placed in the STOP-
RESET (O) position.
" Turbine – Supply oil pressure out of
range"
This message only applies to when the turbine is sup-
plied with an auxiliary oil pump and MSSP6-Turbine
Lubrication Type is set for Pump on the Configuration
Screen 1. It appears when the input signal from the
Turbine Supply Oil Pressure Transmitter is above 29.8
PSIG. This is outside the normal operating range and
generally indicates a defective transmitter. The chiller
can only be started after the transmitter input is indi-
cating a pressure that is within range and the START/
STOP control switch is placed in the STOP-RESET
(O) position.
An input signal less than 0 PSIG while
the auxiliary oil pump is running or while
the turbine is running would also indicate
a defective transmitter but will generate
a normal safety shutdown message since
this value exceeds the safety setpoint.
"Turbine – Supply oil low pressure"
This message only applies to when the turbine is sup-
plied with an auxiliary oil pump and MSSP6-Turbine
Lubrication Type is set for Pump on the Configura-
tion Screen 1. It appears when the input signal from
the Turbine Supply Oil Pressure Transmitter is below
the PSP8-Turbine Supply Oil Low Pressure shutdown
setpoint shown on the Alarm/Shutdown Setpoints
Screen. This check is bypassed for the first 45 seconds
of the prelube after the message "START SEQUENCE
INITIATED" is displayed. The START/STOP control
switch must be placed in the STOP-RESET (O) posi-
tion before starting the chiller.
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