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Standard Features—5 Ton Systems
Liebert
®
Mini-Mate2
™
8
2.4 System Controls
System controls include a microprocessor control board mounted in the evaporator/chilled water
unit and a wall-mounted interface with a two-line, 16-character liquid crystal display. A seven-key,
membrane keypad for setpoint/program control, unit On/Off and alarm silence is below the LCD
screen. It provides temperature setpoint and sensitivity adjustment, humidity setpoint and
sensitivity adjustment, digital display of temperature, humidity, setpoints, sensitivities and alarm
conditions.
The wall-box is field-wired to the microprocessor control using standard four-conductor thermostat
wire (field-supplied). The temperature and humidity sensors are in the wall box, which can be
installed up to 300 feet (91.4m) from the evaporator unit. The unit-mounted control board also
includes common alarm terminals and shutdown terminals. The unit automatically restarts after a
power outage.
Figure 6 Wall-box
2.4.1 Other Standard Control Features
• Adjustable auto restart • Calibrate sensors
• 5 day/2 day setback • Predictive humidity control
• Password protection • Common alarm output
• Alarm enable/disable • Remote shutdown terminals
• Self-diagnostics