Specifications

65
JOHNSON CONTROLS
Form 201.28-NM1.EN.PED/CE (0211)
8
SYS X ISN SOUND LIMITING
The ISN sound limiting message indicates the sound
load limit is in effect based on the ISN transmitted sound
limit setpoint. The sound limit must be activated for this
function to operate.
SYS X REMOTE SOUND LIMITING
The Remote sound limiting message indicates the sound
load limit is in effect based on the Remote controlled
sound limit setpoint. The setpoint may be offset using a
remote voltage or current signal. The sound limit option
must be activated for this function to operate.
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 Temperatures.
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
OUTSIDE AMBIENT AIR TEMP = XXX.X °F
The next key press will display the time remaining on the
load and unload timers.
UNIT LOAD TIMER = XXX SEC
UNLOAD TIMER = XXX SEC
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.
UNIT TEMP ERROR = XXX.X °F
RATE = XXX.X °F/M
The next key press displays the system designated as the
lead system and the Flow Switch status (ON or OFF).
UNIT LEAD SYSTEM NUMBER = 1
FLOW SWITCH = OFF
The next key press displays the status of the evaporator
pump and heater, where XXX is either ON or OFF.
UNIT EVAP PUMP RUN = OFF
EVAP HEATER = OFF
The next key press displays the status of Active Remote
Control.
UNIT ACTIVE REMOTE CONTROL = XXXXX
TYPE: RCC ISN CURR TEMP SOUND
XXXXX is either ACTIVE or NONE.
If no remote keys are active, the items on the second line
are all blanked out. Any remote items that are active will
be displayed, while the inactive items will be blanked
out.
The types of remote control are listed as follows:
• NONE - No remote control is actively controlling
the chiller; however, remote monitoring by a remote
device may still be active.
• RCC - A Remote Control Center is providing remote
control. The chiller is in remote mode.
• ISN - YorkTalk via ISN. The chiller in remote
mode.
• CURR - Remote Current Limiting is enabled.
• TEMP - Remote Temperature Reset is enabled.
• SOUND - Remote Sound Limiting is enabled.
The next key press displays the sound limit values as set
under the PROGRAM key by the Local, ISN, and the
Remote Sound Limit Inputs. Any sound limits that are
inactive will display XXX instead of a numeric value.
UNIT SOUND LIMIT LOCAL = XXX %
ISN = XXX REMOTE = XXX %