This product must be used in accordance to the following directions by HVACR professionals only.
Drain water from system and flush system to remove loose scale and sludge. Fill system with fresh water adding one gallon of Liquid Scale Dissolver for every 20 gallons of water in the system. Vent enclosure(s) to prevent the build-up of pressure. Allow the cleaner to circulate until all the scale is removed. If the cleaner turns blue or purple, the solution has been neutralized and another treatment or more of cleaner is required. For convenience, pH strips are also supplied with each product.
The system is free of scale when the solution retains a green color for 15-30 minutes. Most cleanings can be accomplished within two to four hours. After cleaning, thoroughly rinse with flowing water making sure all residuals of the cleaner have been flushed. Consult Nu-Calgon publications 3-106 and 3-918 for additional instructions and precautions before the use of the product.