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TrilliumSeries™ Adiabatic
Cooler - TRF Operation & Maintenance Manual
–
Control Logic
Page | 40
8. Control Logic
The controller controls the fan speed based on the actual fluid outlet temperature and the standard or free cooling set point,
ensuring a minimum electrical consumption and noise level. The PLC will operate as described in
. The process fluid
temperature set point and the adiabatic switchpoint are adjustable via the Setpoint menu. The PLC continuously measures the
fluid output temperature via a temperature sensor installed in the fluid out pipe, and the ambient temperature via a temperature
sensor that is factory installed on the unit. The PLC is pre-programmed and ready for operation. However, depending on the
size of the installation, you may need to adjust the pre-programmed parameters during start-up.
NOTICE:
Changing the controller's parameters may result in an undesired operation of the
unit, such as a hunting phenomenon, premature activation of pre-cooling (and increased
water consumption) or delayed pre-cooling activation (fluid outlet temperatures exceeding
the design temperature).