Spring is a great time to consider your facility’s cooling tower system. As the weather warms up, many comfort cooling systems shut down in the late fall and winter will soon be put back into operation. Following a few “good housekeeping” procedures are important before these systems are filled with water and started up. These steps allow facilities managers to save money and avoid headaches during the cooling season.
Step 1: Clean Cooling Tower Fill, Basin and Hot Deck
To prepare a cooling system for the upcoming season, clean the cooling tower fill, basin and hot deck. Dirt and debris from the previous cooling season and winter months can build up and must be removed. Failure to remove this debris can foul and plug system components, leading to poor cooling system performance.
Additionally, debris can be a food source for microbiological growth, which can cause corrosion and fouling of heat exchange surfaces and can lead to airborne pathogens such as Legionella. To avoid these issues, debris should be removed from the hot deck and distribution holes. Any broken sprayers or distributors should be repaired or replaced, and the system should be sanitized before being returned to service.
Step 2: Clean and Calibrate Cooling Water Controller
To ensure the optimal functioning of your cooling systems, it’s crucial to clean and calibrate various components. These include the cooling water conductivity controller, probes, flow switch, level controls and chemical metering pumps. Conductivity, pH, and ORP probes that have not been serviced for several months should be cleaned and calibrated. Chemical metering pumps may also need to be cleaned and primed with fresh chemicals before calibration.
Components not properly maintained during the previous season may need to be repaired or replaced to help your cooling systems run smoothly and efficiently. Check that all parts function correctly to keep the cooling water’s chemical balance and prevent scale buildup and corrosion.
Step 3: Clean and Lubricate Fans and Motors
The final step in preparing for the cooling season is cleaning fan housings, lubricating fans and motors, and checking for oil leaks. Ensure fan belts are tight and in working order and replace them if necessary. Oil leaks in fan motors can foul the cooling water system, reducing heat transfer efficiency and causing microbiological growth.
RK Water can assist with your facility needs by providing maintenance services for cooling tower systems, including cleaning and disinfecting the water tanks, checking and repairing leaks, and ensuring that the system is functioning correctly before the start of the cooling season. RK Water’s expertise can help you save money on energy costs and avoid costly repairs down the line.
By: RK Water
The Centers for Disease Control and Prevention (CDC) recently reported that Legionnaires’ disease nearly quadrupled in the United States from 2000 to 2015, and most cases could have been prevented with water treatment solutions to prohibit legionella bacterial growth in water.
From 2000 through 2014, legionellosis increased nearly fourfold, from .42 to 1.62 cases per 100,000 persons. The disease is contracted when a person breathes small droplets of water contaminated with the bacteria Legionella. In the past year, about 5,000 Americans were diagnosed, and more than 20 outbreaks were reported. About one in ten infected persons will die from the infection, and most require hospital care to make a full recovery.
The CDC cited that cooling towers are a common source of infection and must be properly maintained to prevent legionellosis, and they recently released a toolkit: Developing a Water Management Program to Reduce Legionalla Growth and Spread in Buildlings: A Practical Guide to Implementing Standards.
Most facilities managers are now familiar with ASHRAE 188-2015 which mandates that everyone with responsibility for centralized water systems-owners, corporate managers, operators and facility managers-must proactively reduce and prevent legionella growth. RK Water provides chemical treatment programs that can be added to existing water treatment programs to reduce the odds of legionella.
We also offer innovative non-chemical technologies like Silver Bullet which uses biocide oxidizers, known as hydroxyl radicals, to kill bacteria and maintain it at low and safe levels-even more effectively than chlorine. In a 2012 University of Pittsburgh study, Silver Bullet™ reduced free-floating legionella bacteria concentration by 78.1{daeb8d662f58e4975bc93960761d671bdf0aa2ad049ea8a375d2717d280ef80b}. It also reduced free-floating Heterotrophic Plate Count (HPC) bacteria by 98.8{daeb8d662f58e4975bc93960761d671bdf0aa2ad049ea8a375d2717d280ef80b} and immobile HPC bacteria by 85.9{daeb8d662f58e4975bc93960761d671bdf0aa2ad049ea8a375d2717d280ef80b}. The HPC test measures microorganisms such as bacteria, yeast and mold in drinking water.
Silver Bullet is safe, quick to install and doesn’t require a large capital investment. The equipment is installed at a facility as an adjunct to its existing water system and the facility pays a monthly rental fee. No large equipment to purchase, and RK Water handles installation, service and maintenance. Want to protect your water system from Legionella? Consider Silver Bullet if you prefer a non-chemical, sustainable solution.