Surge protection screen (dual-compressor operation)
Figure 20: Surge protection screen (dual-compressor operation)
This screen displays the dual-compressor surge protection parameters. The setpoints applicable to
this feature are maintained here. An LED illuminates when a surge event is detected during dual-
compressor operation.
Note:
This screen and all parameters displayed here apply to dual-compressor operation only.
Table 45: Display only fields
Field/LED name
Description
Surge window time
When the lag compressor is started, this value counts up from 1 minute to the time
programmed as the COUNT WINDOW Setpoint. When it reaches a count equal to
the COUNT WINDOW setpoint, it no longer increments and the number of dual
compressor surge events in the oldest minute is discarded and the number of dual–
compressor surge events in the most recent minute are added, thus providing a
rolling count of the total dual-compressor surge events that have occurred within the
last number of minutes displayed as the SURGE WINDOW TIME. This value is reset
when one or both compressors have shutdown.
Surge window count
Displays the number of dual-compressor surge events that have occurred in the last
15 to 120 minutes (as programmed with the COUNT WINDOW setpoint). If the lag
compressor has been running for less than the COUNT WINDOW setpoint minutes,
it is the number of dual-compressor surge events that have occurred within the last
number of minutes displayed as the SURGE WINDOW TIME. The count is cleared when
the one or both compressors have shutdown.
Total surge count
Displays the total number of dual-compressor surge events detected over the lifetime
of the chiller.
Surge detected (LED)
Lights for 5 seconds each time a dual-compressor surge is detected.
High head lag start (LED)
Lights when a High Head Lag Start condition exists. The lag chiller is prone to surge on
start when a high head condition exists. During these conditions, the lead compressor
will be unloaded before the lag compressor is started.
Lead compressor
Identifies the compressor that has been assigned as the lead compressor.
Lead % Full Load Amps
Displays the motor current of the lead compressor as a percentage of the Full Load
Amps of that compressor motor.
Lead PRV position
Displays the position of the lead compressor pre-rotation vanes position.
Model YD Mod D with OptiView Control Center
60
Summary of Contents for YD Mod D
Page 2: ...2 Model YD Mod D with OptiView Control Center...
Page 8: ...Nomenclature Model YD Mod D with OptiView Control Center 8...
Page 17: ...Figure 2 Chiller operation flow chart 17 Model YD Mod D with OptiView Control Center...
Page 18: ...Figure 2 Chiller operation flow chart Model YD Mod D with OptiView Control Center 18...
Page 19: ...Figure 2 Chiller operation flow chart 19 Model YD Mod D with OptiView Control Center...
Page 20: ...Figure 2 Chiller operation flow chart Model YD Mod D with OptiView Control Center 20...
Page 21: ...Figure 2 Chiller operation flow chart 21 Model YD Mod D with OptiView Control Center...
Page 22: ...Figure 2 Chiller operation flow chart Model YD Mod D with OptiView Control Center 22...
Page 150: ...Figure 57 Sample printout status Model YD Mod D with OptiView Control Center 150...
Page 151: ...Figure 57 Sample printout status 151 Model YD Mod D with OptiView Control Center...
Page 152: ...Figure 58 Sample printout setpoints Model YD Mod D with OptiView Control Center 152...
Page 153: ...Figure 58 Sample printout setpoints 153 Model YD Mod D with OptiView Control Center...
Page 154: ...Figure 59 Sample printout schedule Model YD Mod D with OptiView Control Center 154...
Page 155: ...Figure 60 Sample printout sales order 155 Model YD Mod D with OptiView Control Center...
Page 156: ...Figure 61 Sample printout history Model YD Mod D with OptiView Control Center 156...
Page 157: ...Figure 61 Sample printout history 157 Model YD Mod D with OptiView Control Center...
Page 159: ...Figure 64 Sample printout custom screen report 159 Model YD Mod D with OptiView Control Center...