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APC ACECFR20200SE4 Installation Manual Page 12

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EcoBreeze System Operation and Maintenance6
Configuration
Modules
The EcoBreeze is comprised of up to eight identical Modules contained in a common Frame.
These Modules are fully self-contained cooling apparatus, with the exception of a common
Frame-based water system for support of indirect evaporative cooling (IEC). Each Module has
a degree of autonomy supported by its own integral controller. Coordination of the Modules is
handled by the master controller located in the Frame.
Frame
Each 12-meter (40-ft) Frame can accommodate up to eight Modules.
Each 6-meter (20-ft) Frame can accommodate up to four Modules.
The Frame controls the common water system to support the indirect evaporative cooling
mode.
The Frame distributes power from the mains to the Modules.
The Frame master controllers collect all sensor information, including outside air temperature,
outside air humidity, supply air differential pressure, basin level, and water conductivity. The
controllers collect status information for all digital inputs, including supply water pressure,
remote run/stop status, and isolation damper switch. They open/close digital relay outputs,
including power on/off to the two pumps and water treatment electric box, turn on/off two basin
solenoid valves, turn on/off blow-down drain solenoid valve, turn on/off the drain solenoid
valve, turn on/off air pump for the basin level sensors, turn on/off the alarm contact and open/
close isolated damper switch.
Frame controllers have a communication port that supports Modbus RTU for Building
Management Systems (BMS) and a port for a Controller Area Network (CAN) for inter-Module
communication.
SUPPLY
BLOWER
ACCESS
COIL
ACCESS
SUPPLY
BLOWER
ACCESS
COIL
ACCESS
SUPPLY
BLOWER
ACCESS
COIL
ACCESS
SUPPLY
BLOWER
ACCESS
COIL
ACCESS
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