Capacity control screen
Figure 21: Capacity controls screen
This screen displays the pertinent parameters associated with capacity control in relation to Leaving
Chilled Liquid temperature, current and pressure overrides, and anti-surge control. This screen also
provides a means for a service technician to control VGD, Speed, and Optional Hot Gas Bypass Valve
manually for maintenance or service.
Table 35: Display only fields
Field/LED name Description
Evaporator Pressure Displays the pressure in the evaporator.
[Evaporator Pressure]
Override Threshold
Displays the evaporator pressure setpoint below which the low
evaporator pressure capacity control override takes effect.
Condenser Pressure Displays the pressure in the condenser.
[Condenser Pressure]
Override Threshold
Displays the condenser pressure setpoint above which the high
condenser pressure capacity control override takes effect.
Input Current % FLA
Displays the percent of useful job full load current presently supplied
to the chiller, determined from the highest of the three phase Input
Currents/(Input Job FLA setting/0.9).
[Input Current % FLA]
Override Threshold
Displays the active input current percent limit, which is the minimum
of Local Input Current Limit, Remote Input Current Limit, and Pulldown
Current Limit or BAS (ISN) current limit.
Motor Current % FLA
Displays the percentage of maximum motor current delivered to the
motor, determined from the highest of the three phase Motor Currents/
Maximum Motor Current Limit.
[Motor Current % FLA]
Override Threshold
Displays the active motor current percent limit, which is a percentage of
the minimum of VSD and motor maximum current limits.
Entering Chilled Liquid Displays the temperature of the chilled liquid as it enters the evaporator.
YMC
2
Mod B with OptiView
™
Control Center
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