Installation manual

3EcoBreeze System Operation and Maintenance
Module(s)
Modules are fully self-contained cooling apparatus, with the exception of common Frame
based water system for support of indirect evaporative cooling. Each Module has a degree of
autonomy supported by its own integral controller. Each Module regulates the supply air
temperature for its own outdoor air (OA) fan and compressor.
If a Module loses communication with the Frame master controller, the Module keeps the last
instruction received from the Frame acting master controller, and maintains the supply air
temperature at the last received setpoint.
System
The system consists of a Frame and one or more EcoBreeze Modules.
Features
Basic cooling sequence
EcoBreeze is designed to provide sensible cooling while using a minimal amount of
compressor energy over the course of an operating year. This is facilitated by using natural
heat exchange process across an air-to-air heat exchanger. The heat transfer process may be
enhanced by indirect evaporative cooling, leveraging the outdoor wet-bulb temperature rather
than the higher outdoor dry-bulb temperature. The balance of thermal energy not
accommodated within the air-to-air heat exchanger is removed with a DX system integral to
each Module comprising the system.
The acting master controller is part of the EcoBreeze Indirect Evaporative Cooler (IEC) Frame.
It monitors data center differential pressure as sensed between cool supply air and hot return
air serving the IT equipment within the IT space. The speed of IT fans is regulated as needed to
maintain the pressure differential setpoint. Setpoint regulation is accomplished by means of a
user-tunable, proportional, integral algorithm (PI) loop. The physical sensing points for
differential pressure are located at the Frame supply and return plenum, data center cool
supply and hot return air plenums and across row based containment boundaries.
Economizer selection options
The Frame master controller allows the user to select the operation of the water economizer.
Normally, the Frame controller favors wet operation (water) over dry operation (OA fans only).
By enabling the water saver mode, you can direct the Frame controller to use a minimal
amount of water. This selection can result in using less water at the expense of increased OA
fan energy.