Economizer anti-surge tuning screen
Figure 31: Economizer anti-surge tuning screen
This screen will show all the data and settings relating to capacity control anti-surge setpoints.
The following Display only parameters are useful to Engineering to help diagnose an unexpected
surge issue on a chiller and are not intended for customer or field service use.
Table 81: Display only
Field/LED name Description
Economizer anti-surge data
Displays the minimum temperature that the economizer can go to
before the economizer compressor will start to surge. Efficiency of
the economizer will be the highest at this point:
• Speed of Sound
• Isentropic Head
• Omega
• Surge Mach
• Mach Number
• Anti-Surge Minimum Econ Temperature
• Active Anti-Surge Minimum Econ Temperature
• Min Temperature Rate Maximum
• Min Temperature Rate Minimum
• Min Frequency Admin Multiplier
91YK-EP Style B Centrifugal Chiller
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