Table 77: Adjustable
Field/LED
name
Access level Description
Econ Stop
Refrig Flow
Offset
Service
Range 100 to 5000 CFM, Default 2000 CFM
Displays the difference between the refrigerant flow to start the
economizer and the refrigerant flow to stop the economizer. This
offset prevents the economizer from starting and stopping too
rapidly.
Econ
Temperature
Setpoint
Offset
Service
Range -6.0 to -2.5°F, Default -2.5°F
Displays the economizer temperature setpoint offset.
Econ Startup
Delay
Service
Range 0 to 30 minutes, Default 5 minutes
Displays the amount of time set to delay the start of the
economizer.
Econ Start
Econ Level
Offset
Service
Range 0 to 100%, Default 40%
Shows the position of the Pre-Rotation Vanes at full capacity.
Econ
Level High
Shutdown
Service
Range 80 to 100%, Default 95%
Displays the position of the Pre-Rotation Vanes at full capacity.
Full Capacity
PRV Position Service
Range 80 to 100%, Default 95%
Displays the position of the main compressor PRV when it is
considered to be at Full Capacity.
Econ Exit
Boost Econ
Temp Offset
Service
Range 0 to 5°F, Default 1°F
Displays the offset of the temperature that controls when the chiller
exits the boost mode to go into the economizer mode.
Econ PRV
Start Position Service
Range 0 to 30%, Default 2%
Displays the starting position of the economizer prerotation vanes.
Table 78: Setpoints
Button
Access level Description
Econ Gear
Ratio
Override
Admin
Range 0.0 to 7.0, Default 0.0
Shows the override used if the gears are changed to accommodate
customer performance requirements.
Econ Motor
Slip Factor
Admin
Range 0.98 to 1.0, Default 0
Displays the slip factor of the motor. A 60 Hz motor isn't truly 60 Hz,
but rather a 59% motor. The difference is the slip factor.
Econ
Impeller
Diameter
Override
Admin
Range 0.0 to 1.0, Default 0.0
Displays the change in size of the impeller if a different unit is used
in the economizer.
89
YK-EP Style B Centrifugal Chiller
Summary of Contents for 160.87-OM1
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 ...