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Auto-Discrete Backup Spray System
The Auto-Discrete Backup Spray System provides a backup water system for adiabatic
cooling in case of component failure. The system senses if the pump, make-up valve, or
float switch fails, and if so, disables the pump and triggers a backup supply of water to
spray over the Pre-Cooler Pads. The system also sends an alarm signal. The system has an
automatic reset feature, whereby it periodically checks the components to identify if the
fault has cleared. If it has cleared, it returns the unit to normal operation, or the system
can be manually reset.
Figure 27b. Auto-Discrete Operation (TSDC)
Auto-Discrete
Valve Open
(Water In)
Pump Valve
Closed
Drain Open
Figure 27a. Pre-Cool Mode Operation (TSDC)
Auto-Discrete Valve Closed
Pump Valve Open
(Water In)
Figure 28. Location of Auto-Discrete Valve on TSDC2 and TSDF2
Detail A
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