York YVAA Installation, Operation & Maintenance Instructions Manual page 151

FORM 201.28-NM1.1
ISSUE DATE: 1/31/2018
OPTIONS LOCAL / REMOTE CONTROL MODE
◄ ► XXXXXXXXXXXXXXXXXX
When LOCAL CONTROL mode is selected, chilled
liquid control is from the keypad of the chiller. In local
mode, a remote device can read system data, but not
reset operating parameters.
OPTIONS LOCAL / REMOTE CONTROL MODE
◄ ► LOCAL CONTROL
When REMOTE CONTROL mode is selected, control
of the chilled liquid setpoint is from a remote device
such as an ISN/BAS controller.
OPTIONS LOCAL / REMOTE CONTROL MODE
◄ ► REMOTE CONTROL
The default mode will be LOCAL CONTROL.
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.
JOHNSON CONTROLS
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
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 to 10VDC, 2 to 10VDC, 0 to 20ma, and 4 to 20ma.
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 to 10VDC, 2 to 10VDC, 0 to 20ma, and 4 to 20ma.
OPTIONS REMOTE CURRENT LIMIT INPUT
◄ ► DISABLED
SECTION 8 - MICROPANEL
151
8