This a condensate trap. It is used to drain the water that the coils produce the pans.
In the earlier pictures of the fan walls there is no wiring. The next step will be to take 12 individual runs of wiring from this VFD to the fans. VFD mean variable frequency drive. The VFD's will control the fan speed. The speed will be activated upon the amount of air needed to cool the building. The heat load is determined by the vices people and outside air temperatures. The control panel (not shown) will determine this. It interacts with the building energy system
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