Cooling Tower Spray Pump Sequence

From there the fans can sequence or modulate to keep temp.

Cooling tower spray pump sequence.

Air in pump suction. A improper application of tower bypass controls. It s the smallest motor and most effective in cooling. During this start up period flow rates can be so low as to cause bottom venting and prevent sometimes forever formation.

As caused by tower pan vortex pan drain down or faulty bypass. The spray pump cycles off when the temperature pressure falls below the. The vfd cycles off when the temperature pressure falls below the lower deadband. The vfd will cycle on to provide increased cooling.

Pump cavitation and loss of pumping ability as caused by inadequate pump suction pressure. B high pressure drop tower spray nozzles in. Another reason for the pump running first is for water treatment. Evapco home page evapco.

08 16 2018 11 56 pm 22. An unfortunate operational sequence can occur during pump start up when the pump energy head is devoted towards simply raising water from the low level pan to the highest part of the system. From what i have seen the spray pump fires up first. The vfd and the spray pump will remain on until the actual leaving temperature pressure falls below the leaving setpoint.