Installation manual

33EcoBreeze System Operation and Maintenance
Environment Control
The EcoBreeze can sense ambient temperature and automatically switch between DRY and
WET mode to optimize efficiency. The Frame controls the Modules to provide the conditioned
air to the computer room.
Air-to-air heat exchange
Air-to-air heat exchange is the DRY mode and only requires the power of the fans to move the
air (extremely energy efficient). All water in the system is dumped during dry operation to
prevent freezing and the energy efficient outside air fan modulates airflow across the heat
exchanger to maintain the IT supply air setpoint.
• When ambient air drops below 4.4°C (40°F) the system water is dumped to prevent
freezing. The system water will also be dumped after 24 hours (user adjustable setting)
of spray-free operation.
• Only the fans are required to move the air.
• Cool air passes over the outside of the heat exchanger channels, cooling the hot IT air
flowing inside.
Indirect evaporative cooling (IEC)
Indirect evaporative cooling is the WET mode and allows for economizing in hot, dry climates.
Unevaporated water is collected and recirculated through the chemical-free water treatment
system. The conductivity meter in the water basin maintains optimal water-makeup.
• Heat is removed from the IT air by evaporating water on the outside of the heat
exchanger channels.
• Water is supplied evenly over the heat exchanger channels via spray nozzles.
• Maintains the adjustable IT supply air setpoint.
Proportional DX cooling
If ambient conditions do not allow evaporative cooling to meet the supply air setpoint, the
proportional refrigerant circuit will start automatically at a varying capacity to help cool to the
setpoint.
The refrigerant circuit is only designed to handle 60% of the load for each Module. This means
that at least 40% of the cooling will always be handled by the IEC heat exchanger.
• Variable speed compressors allow for optimal efficiency.
• Supplements evaporative cooling to maintain the supply air setpoint.
• Designed for 60% of full load.
• Uses R410a refrigerant.
Setpoints
Setpoints are the target values each mode will maintain. User setpoints are at the Frame level,
not separate for each Module