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Form 201.28-NM1.1
Issue date: 08/06/2021
Display units selection
Imperial or SI display units may be selected for data
display.
OPTIONS
DISPLAY UNITS
◄ ►
XXXXXXXXXXXXXXXXXX
The user may select system operating temperatures and
pressures to be displayed in either SI (°C, barg) or Im-
perial units (°F, psig).
OPTIONS
DISPLAY UNITS
◄ ►
IMPERIAL
OPTIONS
DISPLAY UNITS
◄ ►
SI
The default mode is IMPERIAL.
System lead/lag control mode selection
The operator may select the type of lead/lag control
desired.
OPTIONS
LEAD / LAG CONTROL MODE
◄ ►
XXXXXXXXXXXXXXXXXX
In most cases, automatic lead/lag will be selected.
When automatic lead/lag is selected, the microproces-
sor will attempt to balance run time by switching the
lead compressor whenever all compressors are shut
OFF. If a compressor is not able to run when the mi-
croprocessor attempts a start, the microprocessor will
select another compressor in an effort to control chilled
liquid temperature. Manual lead/lag allows selecting a
specific compressor to be the lead.
OPTIONS
LEAD / LAG CONTROL MODE
◄ ►
AUTOMATIC
The default mode will be AUTOMATIC.
Lag selections of individual systems will appear as:
OPTIONS
LEAD / LAG CONTROL MODE
◄ ►
MANUAL SYS 1 LEAD
OPTIONS
LEAD / LAG CONTROL MODE
◄ ►
MANUAL SYS 2 LEAD
JOHNSON CONTROLS
Remote temperature reset selection
Remote temperature reset from an external source may
be tied directly into the chiller microprocessor board.
OPTIONS
REMOTE TEMP RESET INPUT
◄ ►
XXXXXXXXXXXXXXXXXX
Selections may be made for DISABLED (no signal), 0
VDC to 10 VDC, 2 VDC to 10 VDC, 0 mA to 20 mA,
and 4 mA to 20 ma.
OPTIONS
REMOTE TEMP RESET INPUT
◄ ►
DISABLED
OPTIONS
REMOTE TEMP RESET INPUT
◄ ►
0.0 TO 10.0 VOLTS DC
OPTIONS
REMOTE TEMP RESET INPUT
◄ ►
2.0 TO 10.0 VOLTS DC
OPTIONS
REMOTE TEMP RESET INPUT
◄ ►
0.0 TO 20.0 MILLIAMPS
OPTIONS
REMOTE TEMP RESET INPUT
◄ ►
4.0 TO 20.0 MILLIAMPS
The default setting for Remote Temp Reset is
DISABLED. This display will only appear if the
remote temperature limit option is enabled under the
Unit Setup Mode.
Remote current limit input selection
Remote current limit from an external source may be
tied directly into the chiller microprocessor board.
OPTIONS
REMOTE CURRENT LIMIT INPUT
◄ ►
XXXXXXXXXXXXXXXXXXXXX
Selections may be made for DISABLED (no signal), 0
VDC to 10 VDC, 2 VDC to 10 VDC, 0 mA to 20 ma,
and 4 mA to 20 mA.
OPTIONS
REMOTE CURRENT LIMIT INPUT
◄ ►
DISABLED
OPTIONS
REMOTE CURRENT LIMIT INPUT
◄ ►
0.0 TO 10.0 VOLTS DC
OPTIONS
REMOTE CURRENT LIMIT INPUT
◄ ►
2.0 TO 10 VOLTS DC
OPTIONS
REMOTE CURRENT LIMIT INPUT
◄ ►
0.0 TO 20.0 MILLIAMPS
SECTION 8 - MICROPANEL
155
8
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