Table 5: Programmable
Button
Access level Description
Clear Fault
Service
When any safety conditions have been detected and the chiller has
been shutdown, the main status display of the chiller will continue
to display a message indicating the cause of the shutdown. Using
this key, the message can be cleared once the Safety condition has
been removed.
Warning
Reset
Operator
Use of this key acknowledges a warning condition and resets the
message display associated with it.
Start/Stop
Soft Key
Operator
This key will initially be displayed as Start and when pressed, allows
the operator to Start the chiller. If the chiller is in Local mode it
will start immediately. If the chiller is in Remote mode then it will
start once the Start key is pressed and the remote mode calls for
a start. Once started, the soft key changes to Stop and if pressed,
will initiate a Soft Stop. A Soft Stop fully closes the Pre-Rotation
Vanes prior to shutting down the compressor. This reduces bearing
wear by eliminating compressor backspin at shutdown. While the
vanes are closing, "Vanes Closing Before Shutdown" is displayed
on the System Status Line. When the Vane Motor Switch (VMS)
closes, indicating the vanes have fully closed (or 3.5 minutes
have elapsed, whichever occurs first), the Run signal is removed
from the compressor motor starter and a System Coastdown is
performed. While the vanes are closing, if a Safety Stop is initiated
with the Safety Stop Switch or any fault other than Leaving Chilled
Liquid Temp – Low Temperature, Remote Stop, Multi-Unit Cycling –
Contacts Open, System Cycling – Contacts Open Or Control Panel –
Schedule occur, it will immediately enter System Coastdown.
Table 6: Navigation
Button
Description
System
Used to provide additional system information.
Evaporator
A detailed view of all evaporator parameters, including the programmable
Leaving Chilled Liquid Setpoints.
Condenser
A detailed view of all condenser parameters, including control of the liquid
level functions.
Compressor
A detailed view of all the compressor parameters. This includes Pre-Rotation
Vane control, Hot Gas Bypass Control, Proximity Probe Calibration, and PRV
Calibration.
Oil Sump
A detailed view of all the oil pump and oil sump parameters. This includes the
Variable Speed Oil Pump when installed. It also controls the Seal Lubrication
functionality.
YK-EP Style B Centrifugal Chiller
24
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...
