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Modes of Operation
TrilliumSeries™ Condenser Bookmark and Share

Science Behind the Operation

Dry Mode

When the ambient air is below the set point, the unit runs as a dry cooler to save water and energy. The ambient air condenses the refrigerant in the microchannel coils which is then returned to the system.

Dry Mode Operation

On-Demand Adiabatic™ Pre-Cooler Mode

When the unit is in On-Demand Adiabatic™ Pre-Cooler mode, water is evenly sprayed over the highly efficient media. The air is humidified as it passes through the media, cooling temperatures down to 2-3ºF above wet-bulb temperature. Such substantial depression of the dry bulb temperature results in a major increase in dry cooling capacity.

The cooler air passes over the microchannel and condenses the refrigerant in the microchannel which is then returned to the system. In the sump there is an industrial duty pump that recirculates the water. Part of the distributed water is evaporated, while the excess water assists in rinsing the On-Demand Adiabatic™ Pre-Cooler media. The EcoFlex Controls determine when the water is purged from the sump.

  • On-Demand Adiabatic Pre-Cooler Operation Modes: There are three different ways to optimize unit operation.
    • Standard Logic (Default): The controller will start the Pre-Cooler Mode at a preset outside air temperature to increase the unit’s capacity and efficiency.
    • Water Saver Logic: The controller will optimize the unit’s dry efficiency and only use water when the conditions require the extra cooling capacity. Pre-Cooler Mode will be initiated only when the outside air temperature is above the switch point and the fans are running at 90% or above for over 60 seconds. This mode will recheck conditions every two hours.
    • Energy Saver Logic: The controller will optimize its sequence so that the least amount of energy is consumed to meet the present load of the unit. Pre-Cooler Mode will be initiated at 10 degrees below the switch point and if the fan speed is above 35%.

On-Demand Adiabatic Pre-Cooler Mode

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