Figure 12 - Capacity Control Screen - York YZ MODEL A Operation And Maintenance Manual

SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION

FIGURE 12 - CAPACITY CONTROL SCREEN

This screen displays the pertinent parameters associat-
ed with capacity control in relation to Leaving Chilled
Liquid temperature, current and pressure overrides, and
DISPLAY ONLY FIELDS
FIELD/LED NAME
Evaporator Pressure
[Evaporator Pressure] Override
Threshold
Condenser Pressure
[Condenser Pressure] Override Thresh-
old
Input Current % FLA
[Input Current % FLA] Override Thresh-
old
Motor Current % FLA
Entering Chilled Liquid
Leaving Chilled Liquid
42
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 service.
DISPLAY ONLY FIELDS
Displays the pressure in the evaporator.
Displays the evaporator pressure setpoint below which the low evaporator pres-
sure capacity control override takes effect.
Displays the pressure in the condenser.
Displays the condenser pressure setpoint above which the high condenser
pressure capacity control override takes effect.
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).
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 current limit.
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.
Displays the temperature of the chilled liquid as it enters the evaporator.
Displays the temperature of the chilled liquid as it leaves the evaporator.
LD26734
DESCRIPTION
JOHNSON CONTROLS
FORM 161.01-OM1
ISSUE DATE: 6/8/2018