York YCAV0157, Installation Operation & Maintenance

Page: 228 / 310

228
JOHNSON CONTROLS
FORM 201.21-NM1 (1223)
UNIT DATA KEY
LD10605
UNIT DATA
KEY
GENERAL
The UNIT DATA Key provides the user with displays
of unit temperatures, and unit related data. Displays
can be selected by repeatedly pressing the UNIT DATA
key or the▲ or ▼ Arrow Keys.
UNIT DATA Key Operation
The first key press displays Evaporator Leaving and
Return Chilled Liquid Temps.
UNIT CHILLED LIQUID LEAVING = XXX.X °F
ENTERING = XXX.X °F
The next key press of the UNIT DATA key or the ▼
(ARROW) key displays the ambient air temperature.
UNIT LOAD TIMER = XXX SEC
UNLOAD TIMER = XXX SEC
UNIT
OUTSIDE AMBIENT AIR TEMP = XXX.X °F
UNIT TEMP ERROR = XXX.X °F
RATE = XXX.X °F/M
The next key press will display the time remaining on
the load and unload timers.
UNIT LEAD SYSTEM NUMBER = X
FLOW SWITCH = XXX
The next key press displays the error in temperature
between the actual leaving chilled liquid temperature
and the setpoint temperature. The display also shows
the rate of change of the chilled liquid temperature.
The next key press displays the system designated as the
lead system and the Flow Switch status (ON or OFF).
MICRO PANEL