Microboard where the unbalance calculation is performed. This safety shutdown is not performed
on Electro-Mechanical Starter applications.
Thrust Bearing – Proximity Probe Clearance
The clearance between the compressor high speed thrust collar and the tip of the Proximity Probe
has increased more than +10 mils or decreased to less than -25 mils (for 2 continuous seconds)
from the Reference Position. The minimum allowed clearance is 23 mils. Therefore, if the Reference
position is less than 47 mils, the shutdown will occur when the actual clearance is less than 22 mils.
The clearance is only checked during the last 20 seconds of System Prelube, during System Run and
during coastdown. Therefore, the fault is only detected during those periods.
CAUTION
This shutdown must be evaluated by a qualified Service Technician prior to starting the chiller. Starting
the chiller without this evaluation could result in severe compressor damage. To prevent the chiller
from starting without the proper evaluation, restart is inhibited until the clearance is within acceptable
limits and a special reset procedure is performed by the Service Technician. The evaluation and reset
procedure are contained in
OptiView Control Center - Service Instructions (Form 160.54-M1)
.
Thrust Bearing – Proximity Probe Out Of Range
The clearance between the compressor high speed thrust collar and the tip of the Proximity Probe
has decreased to less than 17 mils.
The clearance is only checked during the last 20 seconds of System Prelube, during System Run and
during coastdown. Therefore, the fault is only detected during those periods.
CAUTION
This shutdown must be evaluated by a qualified Service Technician prior to starting the chiller. Starting
the chiller without this evaluation could result in severe compressor damage. To prevent the chiller
from starting without the proper evaluation, restart is inhibited until the clearance is 10 to -25
mils of the Reference Position and a special reset procedure is performed by the Service Technician.
The evaluation and reset procedure are contained in
OptiView Control Center - Service Instructions (Form
160.54-M1)
.
Thrust Bearing – Limit Switch Open
The High Speed Thrust Bearing Limit Switch contacts, connected to TB3-81, have opened. This
occurs when the Bearing position decreases to less than the allowed position.
CAUTION
This shutdown must be evaluated by a qualified Service Technician prior to starting the chiller. Starting
the chiller without this evaluation could result in severe compressor damage. To prevent the chiller
from starting without the proper evaluation, restart is inhibited until the switch contacts have closed
and a special reset procedure is performed by the Service Technician. The evaluation and reset
procedure are contained in
OptiView Control Center - Service Instructions (Form 160.54-M1)
.
213
YK-EP Style B Centrifugal Chiller
Summary of Contents for YK-EP
Page 2: ...2 YK EP Style B Centrifugal Chiller...
Page 6: ...6 YK EP Style B Centrifugal Chiller...
Page 227: ...Figure 72 Sample printout of Status 227 YK EP Style B Centrifugal Chiller...
Page 228: ...Figure 73 Sample printout of Status cont YK EP Style B Centrifugal Chiller 228...
Page 229: ...Figure 74 Sample printout of Setpoints 229 YK EP Style B Centrifugal Chiller...
Page 230: ...Figure 75 Sample printout of Setpoints cont YK EP Style B Centrifugal Chiller 230...
Page 231: ...Figure 76 Sample printout of Schedule 231 YK EP Style B Centrifugal Chiller...
Page 232: ...Figure 77 Sample printout of a Sales order YK EP Style B Centrifugal Chiller 232...
Page 233: ...Figure 78 Sample printout of a Sales order cont 233 YK EP Style B Centrifugal Chiller...
Page 234: ...Figure 79 Sample printout of History YK EP Style B Centrifugal Chiller 234...
Page 235: ...Figure 80 Sample printout of History cont 235 YK EP Style B Centrifugal Chiller...
Page 236: ...Figure 81 Sample printout of a security log report YK EP Style B Centrifugal Chiller 236...
