York YK Style H Operation Manual page 52

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
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 Cur-
rent Limit.
[Evaporator] Entering Liquid
Displays the temperature of the chilled liquid as it en-
ters the evaporator.
[Evaporator] Leaving Liquid
Displays the temperature of the chilled liquid as it
leaves the evaporator.
[Evaporator (Cooling)] Active Setpoint
Displays the active temperature setpoint to which the
chiller is set to control liquid leaving the evaporator.
The Active Setpoint is a target to the Local, Remote or
BAS (ISN) LCHLT programmed setpoint, depending
on the control source selected. When the chiller is not
running, the Active Setpoint is set to Entering Chilled
Liquid Temperature - LCHLT Setpoint Start Offset
When the VSD starts, the Active LCHLT Setpoint is
ramped to the programmed LCHLT Setpoint at the
programmable LCHLT Setpoint Ramp Rate. When
the chiller is running, performing capacity control, any
change to the programmed LCHLT setpoint results in
a ramp from the old Active Setpoint value to the new
LCHLT setpoint value at the programmed LCHLT
Setpoint Ramp Rate. Displayed when the unit is cool-
ing or cooling/heating.
[Evaporator (Cooling)] Delta T
Displays the difference between the temperature of the
chilled liquid leaving the evaporator and the Leaving
Chilled Liquid Active Setpoint. Only displayed when
the unit is cooling or cooling/heating. Control State
Displays the present source controlling the command
to the capacity control devices, based on conditions as
follows:
• Inactive- Capacity Control is not active.
• Cooling Control – Capacity Control is active with
no overrides acting.
• Heating Control – Capacity Control is active with
no overrides acting.
• Input Current- Input Current Override is in con-
trol.
• Motor Current- Motor Current Override is in con-
trol.
52
• Condenser Pressure – Condenser Pressure Over-
ride is in control.
• Evaporator Pressure- Evaporator Pressure Over-
ride is in control.
• Low LCHLT- LCHLT low temperature Override
is in control.
• Discharge Superheat- Low Discharge Superheat
Override is in control.
• High LCLT- High Leaving Condenser Liquid
Temperature Override is in control.
Load Limit
Displays if any load limiting control is acting on the
temperature control output to the capacity control de-
vices. The field indicates the following:
• Inactive - Capacity Control is not active
• None – No limit is in effect
• Input Current
• Motor Current
• Condenser Pressure
• Evaporator Pressure
• Discharge Superheat
Head Pressure
Displays the difference between condenser refrigerant
pressure and evaporator refrigerant pressure.
VGD Position
Displays the feedback position of the VGD 0 to 100%.
Entering Condenser Liquid Temperature
Displays the temperature of the condenser liquid enter-
ing the condenser.
[Condenser] Entering Liquid
Displays the temperature of the condenser liquid as it
enters the evaporator.
[Condenser] Leaving Liquid
Displays the temperature of the condenser liquid as it
leaves the evaporator.
[Condenser (Heating)] Active Setpoint
Displays the active temperature setpoint to which the
chiller is set to control liquid leaving the condenser in
a Heat Pump unit. The Active Setpoint is a target to
FORM 160.76-O2
issue date: 6/15/2015
JOHNsON CONtROLs