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Problem Solver - August 2013

Improve Pool Efficiency


When looking for ways to reduce costs at your pool, don't forget to consider possible changes in your pump room. By adding the most up-to-date technology to handle your pool's needs, you can dramatically reduce your costs, while saving energy.

Q: Our aquatic facility is looking for ways to drastically reduce energy consumption in the pump room. What can we do to keep our water flowing but keep our electrical bills to a minimum?

A: You should consider adding a variable frequency drive to your pump room. A variable frequency drive is designed specifically to help aquatic facilities save energy and operating costs in pump rooms. The unit increases pump performance, resulting in energy savings up to 98 percent.

The variable frequency drive allows the system to ramp up to full speed during the day as your pool reaches peak bather loads. Then at night, it triggers an automatic valve that allows the water to filter down to where the water is treated.

Look for a unit with a built-in DC link reactor, which will reduce harmonic noise and protect the drive. In addition, your variable frequency drive should offer an initial ramp to provide acceleration of pumps to a desired minimum speed, at which point the normal ramp takes over. This prevents damage to thrust bearing and overheating of the pump.

You can find units designed for a wide range of operation conditions that come with a thermal protection for the drive and the motor.

Q: What else should we look for?

A: Many facilities also opt to install an easy-to-use, variable speed pump in combination with their variable frequency drive. Variable speed pumps with closed impellers guarantee a longer motor life, even under the stress of higher loads. The lightweight, all-plastic pump construction of a variable speed pump is designed for maximum hydraulic performance, maximum corrosion resistance and one-man installation.

Variable speed pumps are well suited for recreational aquatic pump rooms, as they are self-priming, highly energy efficient and have a motor rated for use with a variable frequency drive. A large trap basket will make it easy to service—an important consideration if there are a lot of trees and foliage in your area.

Q: How quickly can a variable frequency drive help reduce energy costs at our pool?

A: With minimal payback time, a variable frequency drive automatically optimizes energy and offers a built-in display to show you how much time remains until your drive pays for itself. Many utility providers around the country even offer rebates to those that install a variable frequency drive—making the investment in the drive minimal.

Specified to save energy, space, costs and time, variable frequency drives are built to be the heart of your pump room.



FOR MORE INFORMATION

Pentair Commercial Aquatics
800-831-7133
www.pentaircommercial.com


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