If excessive deposits of minerals or salts begin to build on the air entering edge of the Media, there may be one or two solutions.

1. Water flow down the Media is not sufficient enough to wash debris from the surface. Adjust manual flow valve to create more flow.

2. The water is excessively hard with latent minerals. A water conditioning system should be installed if conditions warrant.

The Media face can be cleaned while water is flowing by brushing it with a soft bristled brush in an up and down direction. After brushing, rinse Media with water, remove Media and flush out pan and sump. Replace Media with blue dye edge top and on the leaving edge of air flow. On 6" or thicker pads, refer to the arrows indicating the direction of air flow. (Special care shuld be taken while handling wet Media). If Media is replaced improperly, it could cause condenser damage.

CAUTION: Do not attempt to clean Media by brushing side to side, this will damage Media.

If deposits are too hard for normal brush cleaning, use a Calgonite type condenser coil cleaner. Flush Media after application and brushing.

CAUTION: Do not use an acid base cleaner. Use of such chemicals will destroy bonding glues and resins in media.

All Cool Egde CE-100 Model pre-coolers should be flushed out and cleaned periodically to remove any algae or mineral deposits. In winter, turn off water and electrical power to all model pre-coolers and drain lines to prevent any damage from freezing or splitting. On the CE-100 Model also drain reservoir of water by removing overflow tube.


1. Flush debris from bottom of the cell casing or sump at least twice a year.

2. If a valve or tubing becomes plugged, back flush it with the existing water line.


Where danger of freezing exists, the water supply line must be disconnected and allowed to drain below roof line. Drain sump on recirculating models. Loosen fitting at outlet of solenoid valve to drain any water in distribution tubes and internal plumbing. CELdek Media should be removed if ice or snow storms are anticipated to prevent damage to Media from freezing and thawing.


Scale formation looks like frost and normally shows up on the air entry side of the pad. To prevent scale formation, a bleed-off equal to 10-50% of the amount of water evaporated may be required. The exact amount will depend on the pH and hardness of the water. Once the bleed-off rate is established, the scale can be controlled.

If chemical treatment is needed, the recommended treatment approach is the use of crystal modifiers: such as sulfonated polystyrenes and polymaleic acid. This treatment allows scale to form, but the chemical additives distort the resulting crystal structure, changing the scale to a non-adherent sludge. The sluge deposits are easy to flush from the media surface.


Although algae may grow on a HumiCool™ evaporative cooling pad, it will not cause deterioration or rot. But, if allowed to grow freely, in may eventually clog the passages and inhibit the flow of air. Algae buildup is controlled by implementing simple maintenance techniques. The program should be started early. For more information call us.


Copyright 2007 Cool Edge