York YMC2 - Evaporator Screen Details

JOHNSON CONTROLS
34
FORM 160.84-OM1
ISSUE DATE: 9/21/2017
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
OVERVIEW
This screen displays a cutaway view of the chiller
evaporator. All setpoints relating to the evaporator side
of the chiller are maintained on this screen. Animation
of the evaporation process indicates whether the chiller
is presently in a RUN condition. Animation of the liq-
uid flow indicates chilled liquid flow.
DISPLAY ONLY
Leaving Chilled Liquid Temperature
Displays the temperature of the liquid as it leaves the
evaporator.
Entering Chilled Liquid Temperature
Displays the temperature of the liquid as it enters the
evaporator.
Evaporator Small Temperature Difference
Displays the difference between the Leaving Chilled
Liquid temperature and the Evaporator Refrigerant tem-
perature. The Evaporator Refrigerant temperature will
be represented by the Refrigerant Temperature sensor
input if the sensor is enabled, otherwise it will be repre-
sented by the Evaporator Saturation temperature.
Evaporator Pressure
Displays the present refrigerant pressure in the evapo-
rator.
Leaving Chilled Liquid Temperature Setpoints
– Setpoint
Displays the present setpoint to which the chiller is op-
erating, whether controlled locally or remotely.
Leaving Chilled Liquid Temperature Setpoints
- Shutdown
Displays the Leaving Chilled Liquid Temperature
at which the chiller will shutdown on LEAVING
CHILLED LIQUID – LOW TEMPERATURE cycling
shutdown. It is calculated automatically from the tem-
perature setpoint minus the shutdown offset setpoint
and limited to chiller minimum.
Leaving Chilled Liquid Temperature Setpoints
– Restart
Displays the Leaving Chilled Liquid Temperature at
which the chiller will restart after it has shutdown on
LEAVING CHILLED LIQUID – LOW TEMPERA-
TURE cycling shutdown. This temperature is set as an
offset using the LEAVING CHILLED LIQUID TEM-
PERATURE CYCLING OFFSET – RESTART setpoint.
EVAPORATOR SCREEN
LD17918a
FIGURE 7 - EVAPORATOR SCREEN