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Pre-Cooler Pad Maintenance
The Pre-Cooler Pads, which act as air filters and as such protect the coil from fouling, can
catch airborne debris. An inspection is recommended monthly and should focus on:
• Signs of excessive fouling and scaling of the Pre-Cooler Pads.
• Full and even wetting of the face area (when in Pre-Cooler Mode).
• To keep the Pre-Cooler Pads at their top condition, enable the Self-Clean Cycle for the
daily cleaning operation. See page 30 for further details.
Scaling and Fouling
If excessive dust, debris, scale, etc. has accumulated on the Pre-Cooler Pads, it is
recommended to wash the Pre-Cooler Pads by removing them from the unit and rinsing
them using a standard garden hose at a downward angle. Continue rinsing until water
flows freely to the other side. Never use a brush or a high-pressure hose for cleaning off
the Pre-Cooler Pads.
Scale may deposit when the Pre-Cooler Pads dries at the end of each adiabatic cycle. The
rate of scaling will depend on:
• The number of adiabatic starts and stops.
• The water quality.
– To reduce the amount of scaling on the Pre-Cooler pads due to poor water quality,
throttle the bleed line valve open at the pump discharge.
• Poor air quality and debris can cause an accelerated rate of scaling.
• See the Troubleshooting Guide on page 44 for additional ideas on how to address
scaling.
Pre-Cooler Pad Removal
Removal of the pre-cooler pads has been designed as a tool-free operation for quick access
to the interior of the unit for inspection of the coils and sump area. To remove the pads:
• Remove the knobs or latches located along the length of the water distribution system
covers.
• Lift the hinged spray system covers. This will allow the pre-cooler pads to be removed.
• For TSDC2 or TSDF2 units equipped with the EasyPad™ Removal option, locate the
pad installed between the metal baffles. This pad should be removed first to allow
space for removal of subsequent pads. The baffles can also be easily lifted out of
place prior to removal of other pads.
NOTICE: Do not attempt to remove
the Pre-Cooler Pads while wet to
prevent excessive degradation.
NOTICE: For the TSDC, one of the
Pre-Cooler Pads is smaller than
the others and must be returned to
its designated location. Follow the
yellow label of the unit to identify
the location.
Figure 30a. EasyPad™ Removal Option
Figure 30b. EasyPad Removal Option, Pad Removed
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