Economizer capacity control screen
Figure 29: Economizer capacity control screen
This screen displays a view of the economizer capacity control setpoints and buttons. It provides all
necessary inputs for manual control of the economizer.
Table 74: Display only
Field/LED name Description
Economizing Mode LED LED lights up when the economizer or the Anti Surge is operating.
Economizer Saturated
Temperature
Displays the saturation temperature within the economizer.
Anti Surge Minimum
Temperature
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.
Delta T
Displays the temperature that is the result of subtracting the
Economizer Saturation Temperature minus the Economizer
Saturation Temperature Setpoint.
Motor Current % FLA
Displays the percent of full load amps of the economizer
compressor motor.
Override Threshold
If Motor Current % full load amps is higher than the Override
Threshold, the capacity control will be overridden, it means the
economizer prerotation vanes can't be opened more to increase the
capacity.
Boost Mode LED
This LED is on whenever the Economizer Operation Mode is Boost or
Boost Anti Surge.
Entering Chilled Liquid
Temperature
Displays the entering chilled liquid temperature at the evaporator
and the condenser.
85YK-EP Style B Centrifugal Chiller
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