Table 43: Display only
Field/LED name
Description
Surge Avoidance Surge
Count
This is the total number of surges accumulated by the Surge
Protection feature. If equipped with a VSD or MVVSD, it is only the
surges detected while the drive is running at maximum frequency.
Surge Avoidance Surge
Detected (LED)
Illuminates momentarily when a surge is detected by the Surge
Protection feature. If equipped with a VSD or MVVSD these are
only the surges detected while the drive is running at maximum
frequency.
It illuminates momentarily when a surge is detected by the Surge
Protection feature. If equipped with a VSD, it illuminates whenever a
surge is detected, regardless of the VSD operating speed.
Hot Gas Bypass Control
Mode
Indicates whether the Hot Gas Bypass is under automatic, manual
or override control. When in manual control, it is controlled from
this screen. When in override control, Minimum Load, VSD Override
or VGD Override is displayed as appropriate. Refer to the OptiView
Control Center Service Manual for details of these messages.
Table 44: Valve position
Actual position
Valve position %
0% to 19%
0% (fully closed)
20% to 39%
25% open
40% to 59%
50% open
60% to 79%
75% open
greater than 79%
100% (fully open)
Table 45: Programmable
Button
Access level Description
Close
Percentage
Service
(5 to 15% Default 15%)
This is the incremental amount that the Hot Gas Valve will be closed
at 10 minute intervals after the HOLD period has elapsed.
Hold Period
Service
(30 to 120 minutes; default 30 minutes)
This is the period of time after no more surges are detected that the
Hot Gas Valve closing will begin.
Minimum
Load
Service
(0 to 4°F; default 0°F)
This sets the offset below the Leaving Chilled Liquid Temperature
Setpoint at which the Hot Gas Valve will be opened to the position
allowed by the Maximum Open Setpoint.
Maximum
Open
–
(25 to 100%)
The maximum allowable position for the Hot Gas Valve during a
Minimum load override condition.
YK-EP Style B Centrifugal Chiller
58
Содержание 160.87-OM1
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Страница 231: ...Figure 76 Sample printout of Schedule 231 YK EP Style B Centrifugal Chiller ...
Страница 232: ...Figure 77 Sample printout of a Sales order YK EP Style B Centrifugal Chiller 232 ...
Страница 233: ...Figure 78 Sample printout of a Sales order cont 233 YK EP Style B Centrifugal Chiller ...
Страница 234: ...Figure 79 Sample printout of History YK EP Style B Centrifugal Chiller 234 ...
Страница 235: ...Figure 80 Sample printout of History cont 235 YK EP Style B Centrifugal Chiller ...
Страница 236: ...Figure 81 Sample printout of a security log report YK EP Style B Centrifugal Chiller 236 ...
Страница 260: ...Figure 87 Microboard 031 03630 007 Figure 88 Program card 031 03601 002 YK EP Style B Centrifugal Chiller 260 ...