The time invested in preparation for cooling system start-up can pay big dividends later in the season.
Proper preparation will save water, energy and chemical dollars by ensuring efficient, deposit free, corrosion free heat
transfer surfaces throughout the cooling season. It also will save time and eliminate maintenance headaches during peak
demand periods. The following list is a guide to properly prepare cooling water systems for start-up.
Operating Personnel Training
- Review the purpose of each cooling water treatment chemical used in the system with the operating personnel.
- Review chemical treatment dosage rates.
- Review safe handling procedures for all chemicals used in the system.
- Review testing and recording procedures.
- Make sure that there are adequate reagents for test.
- Check the shelf life of the reagents.
Cooling Tower Mechanicals
- Remove all debris from within and around unit, then flush as required.
- Check and clean strainers, bleed, overflow and drain.
- Lubricate fan and motor bearings per manufacturer’s recommendation.
- Change oil in gear reducer assembly as per manufacturer’s recommendation.
- Check belts, motor pulley and motor mounts. Replace and adjust as required.
- Inspect electrical connections, contactors, relays and operating/safety controls.
- Check motor operating conditions.
- Clean float valve assembly and check for proper operation.
- Check operating setpoints. Adjust as required.
- Read water meter prior to filling the system to determine system capacity. Record in log book.
Water Treatment - OPEN COOLING SYSTEMS
- Clean and calibrate sensors, verify all controller settings and functions, inspect water meters, and validate
proper operation of the flow switch and bleed valve.
- Chemically test the system water for proper bleed rate and treatment levels. Adjust accordingly.
- Visually inspect the open portions of the system for evidence of corrosion, scale or slime and algae growth.
- Slug feed biocide and antifoam to control slime and algae growth. Conduct microbiological test.
- Confirm all chemical pumps are free of leaks, fully functional, and primed.
- Inspect all chemical tubing for cracks.
- Inventory the remaining water treatment chemicals and re-order as required.
Water Treatment - CLOSED SYSTEMS
- Chemically test the system water for proper treatment levels.
- Adjust the treatment level for proper operation.
- Conduct microbiological test in chilled or process loops.
- Record results of the test and inspection including recommendations in log book.