AZ ROC C-58 CR-58 Evaporative Cooling & Ventilation Practice Questions - Arizona ROC C-58 CR-58 Evaporative Cooling And Ventilating Examination Exam

To drain mineral-concentrated water continuously, preventing dissolved scale (calcium/magnesium) from building up on media pads and sump walls. To maintain constant high water pressure inside the distribution spider header. To prevent the circulation pump motor from overheating by dumping excess water into the drain line. To dilute the incoming electrical charge of the water pump motor.