Johnson Controls YORK YK MaxE, Руководство по эксплуатации

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FORM 160.54-O1
23
JOHNSON CONTROLS
eVaporator sCreeN
oVerVieW
This screen displays a cutaway view of the chiller evap-
orator. 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 liquid
flow indicates chilled liquid flow.
dispLaY oNLY
Chilled Liquid Flow Switch (Open / Closed)
Displays whether the liquid flow is present in the evapo -
rator.
Chilled Liquid Pump
Displays the command presently sent by the control
center to the Chilled Liquid Pump (
RUn
or
STOP
).
Evaporator Pressure
Displays the present refrigerant pressure in the evaporator.
Evaporator Saturation Temperature
Displays the present saturation temperature in the
evaporator.
Return Chilled Liquid Temperature
Displays the temperature of the liquid as it enters the
evaporator.
Leaving Chilled Liquid Temperature
Displays the temperature of the liquid as it leaves the
evaporator.
Evaporator Refrigerant Temperature
Displays the temperature of the refrigerant in the evapo-
rator, if the sensor is present.
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 present, otherwise it will be represented
by the Evaporator Saturation temperature.
Leaving Chilled Liquid Temperature Setpoints –
Setpoint
Displays the present setpoint to which the chiller is oper-
ating, 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”. This
temperature is entered as an offset with the “LEAV-
ING CHILLED LIQUID TEMPERATURE CYCLING
OFFSET – SHUTDOWN” setpoint below. Although the
offset setpoint is changed manually, the offset being used
can change automatically to prevent the leaving chilled
liquid temperature from going below the minimum
allowed value: 36ºF (water), 34ºF (water with smart
LD13825
fig. 6
2