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Dry Operation
As illustrated in Figure 2, when the unit operates in dry mode, ambient air cools the process fluid in the coils, which then
returns to the system. The unit operates in dry mode when the ambient dry bulb temperature is less than the adiabatic
switchpoint temperature.
Figure 2. Dry Operation
Adiabatic Switchpoint
The adiabatic switchpoint temperature, also referred to as dry swtichpoint temperature, is the ambient dry bulb temperature at
which the unit transitions from dry operation to adiabatic operation. Once the ambient temperature reaches the switchpoint, the
recirculating pumps turn on to pre-cool the intake air.
Operating Modes
Default
Utilizes factory set operating parameters that balance water and energy savings. Refer to Table 12 for more information.
Energy Saver
The unit is equipped with Energy Saver mode, which can be enabled at any time. This mode optimizes the operating
parameters to save energy. Energy Saver mode will enter adiabatic operation more quickly than Default or Water Saver
modes, resulting in lower fan power energy consumption. Refer to Table 12 for more information.
Water Saver
The unit is equipped with Water Saver mode, which can be enabled at any time. This mode optimizes the operating
parameters to save water. Water Saver mode will cause the unit to stay in dry operation longer than Default or Energy Saver
modes, resulting in lower water consumption. Refer to Table 12 for more information.
TrilliumSeries™ Adiabatic Cooler - TRF Operation & Maintenance Manual – General Information
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