Table of Contents
Advertisement
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 Figure 25. 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).
TrilliumSeries™ Adiabatic Cooler - TRF Operation & Maintenance Manual – Control Logic
Page | 40
Advertisement
Table of Contents
