Compressor Excessive Vibration Shutdown Messages - York YST Operation Manual

FORM 160.67-O1
ISSUE DATE: 4/1/2015
" Turbine – Shaft end horizontal vibration out
of range"
The input signal from the Turbine Shaft End Horizon-
tal Vibration Transmitter is more than 0.5 mA below
the calibrated minimum input signal, which generally
indicates a defective transmitter, probe or cable. The
chiller can only be started after the transmitter input is
within the calibrated range and the START/STOP con-
trol switch is placed in the STOP-RESET (O) position.
An input signal above 5 Mils would also
indicate a defective transmitter or prox-
imity probe but will generate a normal
safety shutdown message since this value
exceeds the safety setpoint.
" Turbine – Shaft end vertical vibration out of
range"
The input signal from the Turbine Shaft End Vertical
Vibration Transmitter is more than 0.5 mA below the
calibrated minimum input signal. This is outside the
normal operating range and generally indicates a de-
fective transmitter, probe or cable. The chiller can only
be started after the transmitter input is within the cali-
brated range and the START/STOP control switch is
placed in the STOP-RESET (O) position.
" Turbine – governor end horizontal vibration
out of range"
The input signal from the Turbine Governor End Hori-
zontal Vibration Transmitter is more than 0.5 mA below
the calibrated minimum input signal, which generally
indicates a defective transmitter, probe or cable. The
chiller can only be started after the transmitter input is
within the calibrated range and the START/STOP con-
trol switch is placed in the STOP-RESET (O) position.
"Turbine – governor end vertical vibration
out of range"
The input signal from the Turbine Governor End Verti-
cal Vibration Transmitter is more than 0.5 mA below
the calibrated minimum input signal, which generally
indicates a defective transmitter, probe or cable. The
chiller can only be started after the transmitter input is
within the calibrated range and the START/STOP con-
trol switch is placed in the STOP-RESET (O) position.
"Turbine - Shaft end horizontal vibration"
The input signal from the Turbine Shaft End Horizon-
tal Vibration Transmitter is above the TVSP2-Turbine
Vibration Shutdown setpoint shown on the Alarm/
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
Shutdown Setpoints Screen. This check is bypassed
during shutdown until the start sequence is initiated.
The START/STOP control switch must be placed in the
STOP-RESET (O) position before starting the chiller.
" Turbine - Shaft end vertical vibration"
The input signal from the Turbine Governor End Hori-
zontal Vibration Transmitter is above the TVSP2-Tur-
bine Vibration Shutdown setpoint shown on the Alarm/
Shutdown Setpoints Screen. This check is bypassed
during shutdown until the start sequence is initiated.
The START/STOP control switch must be placed in the
STOP-RESET (O) position before starting the chiller.
" Turbine - governor end horizontal
vibration"
The input signal from the Turbine Governor End Hori-
zontal Vibration Transmitter is above the TVSP2-Tur-
bine Vibration Shutdown setpoint shown on the Alarm/
Shutdown Setpoints Screen. This check is bypassed
during shutdown until the start sequence is initiated.
The START/STOP control switch must be placed in the
STOP-RESET (O) position before starting the chiller.
" Turbine - governor end vertical vibration"
The input signal from the Turbine Governor End Verti-
cal Vibration Transmitter is above the TVSP2-Turbine
Vibration Shutdown setpoint shown on the Alarm/
Shutdown Setpoints Screen. This check is bypassed
during shutdown until the start sequence is initiated.
The START/STOP control switch must be placed in the
STOP-RESET (O) position before starting the chiller.
CoMpreSSor exCeSSive vibraTion
ShuTdoWn MeSSageS
Since proximity probes cannot be fitted on a single
stage compressor due to internal space limitations, cas-
ing mounted accelerometers are occasionally used as
the only alternative. However, the shutdown setpoint
and delay may need to be set high enough to prevent
nuisance shutdowns due to stall or surge conditions.
Mechanical vibration problems should remain fairly
steady at a high level; aerodynamic problems will ap-
pear and disappear. Therefore, it is recommended that
the normal operating vibration levels be recorded and
the vibration levels be monitored to provide an indica-
tion of developing mechanical problems.
When MSSP18-Compressor Vibration Sensors is set
for Enabled on Configuration Screen 1, the compres-
sor must be fitted with two accelerometers on the ro-
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