QUANTECH
138
SECTION 8 - MICROPANEL
FORM QTC4-NM1
ISSUE DATE: 4/2/2018
Local / Remote Control Mode Selection
Local or Remote Control Mode allows the user to se-
lect the chilled liquid temperature control mode.
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.
OPTIONS LEAD / LAG CONTROL MODE
◄ ► AUTOMATIC
The default mode will be AUTOMATIC. Lag selec-
tions 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 DIS-
ABLED. This display will only appear if the remote
temperature limit option is enabled under the Unit Set-
up 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.
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