Warning
Note
Operation
Tower Start-Up
Among other sources, outbreaks of Legionnaires’ Disease have reportedly been traced to cooling towers. Maintenance and water treatment procedures that prevent amplification and dissemination of Legionella and other airborne bacteria should be formulated and implemented BEFORE systems are operated and continued regularly thereafter to avoid the risk of sickness or death.
Water System:
1.New installations should be cleaned and treated with biocides by a water treatment expert before startup.
2.Remove any and all accumulated debris from tower. Pay particular attention to inside areas of cold water basin, hot water basins, louvers and drift eliminators. Make sure that cold water suction screens are clear and properly installed.
3.Fill the water system to an approximate depth of 71⁄2" (192 mm) in the depressed area of the cold water basin at the air inlet side of the tower. This is the recommended operating water level. Adjust the float valve so that it is 75% open at that level. Continue filling the system until the water reaches a level approximately 1⁄8" (3 mm) below the lip of the overflow.
If tower is equipped with a standard suction connection, vent ac- cumulated air from the top of the suction hood by removing one or both tap screws provided at that location. Replace these tap screws when venting is complete.
4.Completely open hot water flow control valve(s). Start your pump(s) and observe system operation. Since the water system external to the tower will have been filled only to the level achieved in the cold water basin, a certain amount of
Some
12
