Recirculation Pump; Sump Water Level Float Switches - Baltimore Aircoil Company TrilliumSeries TRF Operation & Maintenance Manual

Recirculation pump

Each unit is supplied with two 1/3 HP submersible recirculation pumps as shown in Figure 12. Each pump recirculates water to
one air inlet face. Both pumps are located on the same side of the unit and can be accessed via the sump access door. Never
lift or carry the pump by the electrical cord, use the pump handle to install/remove pump. At least quarterly and upon seasonal
startup, clean the pump by removing debris from the bottom strainer portion of the pump.
Figure 12. Submersible recirculation pumps

Sump Water Level Float Switches

Three industrial grade stainless steel float switches maintain the water level in the sump between a minimum and maximum
level in order to ensure sufficient water is available for a proper wetting of the adiabatic pre-cooler pads. All switches are
factory set at the correct level. Each unit is supplied with three sump water level float switches as shown in Figure 13. At least
quarterly and upon seasonal startup, inspect to confirm that each float is free to move and not coated with any substance.
Clean each float switch as needed. This can be done without disturbing the installation by wiping the float and stem to remove
any buildup.
Figure 13. Sump water level float switches
TrilliumSeries™ Adiabatic Cooler - TRF Operation & Maintenance Manual – Component Information & Maintenance
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