Cooling Tower Spray Pump Sequence

The vfd will cycle on to provide increased cooling.

Cooling tower spray pump sequence.

The spray pump cycles off when the temperature pressure falls below the. A improper application of tower bypass controls. 08 16 2018 11 56 pm 22. From what i have seen the spray pump fires up first.

For closed loop towers and evaporative coolers it showed stage 1 as the spray pumps for all units and the fans as successive stages. Evapco home page evapco. Pump cavitation and loss of pumping ability as caused by inadequate pump suction pressure. As caused by tower pan vortex pan drain down or faulty bypass.

The vfd and the spray pump will remain on until the actual leaving temperature pressure falls below the leaving setpoint. It s the smallest motor and most effective in cooling. The vfd cycles off when the temperature pressure falls below the lower deadband. B high pressure drop tower spray nozzles in.

Unstable pump operational points as caused by. From there the fans can sequence or modulate to keep temp. Another reason for the pump running first is for water treatment. During this start up period flow rates can be so low as to cause bottom venting and prevent sometimes forever formation.