McQuay MAC Manual de usuario Pagina 5

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Supports up to 50 chillers and 120 fan coil units. Meets the
requirements of a wide variety of applications.
Displays up to 46 chiller and 6 fan coil faults/alarms.
Simplifies troubleshooting and reduce valuable service time.
Priority settings. Offer users flexibility to preset the priority of
operation on chiller(s) or fan coil unit(s) so that units are
automatically forced OFF if the priority units are OFF.
Threshold value setting. Offers users flexibility to preset
operating thresholds that will automatically force all units into
COOL or HEAT mode if the number of units requiring either
mode crosses the threshold for that mode.
Programmable timer. Allows users to preset two ON/OFF
timers for each unit and up to five timers for multiple units based
on the time and day of the week to greatly reduce energy costs
during unoccupied periods.
Holiday setting. Allows users to preset up to 10 holiday timers
(99 day duration each) to automatically turn units OFF and greatly
reduce energy costs during unoccupied holidays.
Alarm memory backup (EEPROM). Will display the last state
of Chiller/Fan Coil unit alarms prior to a power failure and allows
service technicians to view previous alarm records to assist in
troubleshooting and maintenance.
Password protection for advanced parameter settings
(Chillers). Helps prevent the loss of key chiller operating
parameters that have been set by experienced professionals.
Low power mode (Chillers and Fan Coils). Helps conserve
energy during an electrical power breakdown, operating on a built-
in backup battery with no LCD display and one timer and
interrupt active.
Key parameter display. Saves service technicians time by
allowing key parameters (defrost/compressor discharge sensor
temperature, water in/out temperature, compressor ON/OFF status
and COOL/HEAT mode water-in temperature, etc.) to be viewed
on the Smart Manager keypad versus at each unit.
Accumulative compressor run time. Allows service technicians
to view compressor run times and provides a reminder for routine
system service.
Multiple temperature zone control. Fan coil units can be
managed independently or in zones with similar air conditioning
requirements to provide maximum comfort.
Real Time Clock (RTC). Time and date appear on all LCD
screens for easy reference and can be set by the user.
Features and Benefits
Threshold value setting automatically
forces units into HEAT or COOL mode
once the threshold for that mode
has been crossed.
Alarm messages display on the Smart
Manager LCD to simplify troubleshooting.
Alarms are automatically cleared once the
fault has been resolved
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