Hayward Universal H-Series Service/Installation: H150FDN H200FDN H250FDN H300F - Page 8

8 2. POOL/SPA WATER CHEMISTRY The chemistry balance and mineral content of swimming pool water changes daily due to the addition of pool and sanitizing chemicals, bather loads, rain, runoff and the amount of sun - to name a few. Improper chemistry balance and mineral content can cause scaling and deposits to form on pool walls, in the filtration system, in the heat exchanger tubes and additionally can promote corrosive action to all metals in the water path. Changing spa water regularly and maintaining the correct chemical balance in your pool/spa will keep the pool/spa safe and sanitary, and will help protect the heat exchanger. Use a 4-way pool/spa water test kit to check your water frequently (at least weekly). Use the following guidelines to help protect your heater's heat exchanger: Chlorine Bromine pH Total Alkalinity Calcium Hardness Salt Recommended Level 1 - 3 ppm 2 - 4 ppm 7.4 - 7.6 80 - 120 ppm 200 - 400 ppm Effect of Low Levels hazy water, algea growth, bacteria causing infections corrosive to heat exchanger, swimmer irritation corrosive to heat exchanger, large fluctuations in pH corrosive to heat exchanger Effect of High Levels swimmer irritation, bleaching of clothes/hair, corrosive to heat exchanger cloudy water, scaling of heat exchanger, reduced sanitizer effectiveness scaling of heat exchanger scaling of heat exchanger 2700 - 5000 ppm poor salt chlorinator performance corrosive to heat exchanger 3. SKIMMER CHLORINATION Placing chlorine or bromine tablets directly into the skimmer may result in high chemical concentrations flowing through the heater. DO NOT place chlorine or bromine tablets in the skimmer. 4. CHLORINATOR INSTALLATION Chlorinators must be installed downstream of the heater, and a check valve must be installed between the heater and chlorinator to prevent high chemical concentrations from back flowing into the heater. Make sure your piping arrangement meets the chlorinator installation requirements shown on page 27. 5. BYPASS Until water chemistry is properly balanced, and if your piping has a bypass valve installed for the heater, open the bypass so that corrosive and potentially damaging water will not flow through the heater and therefore the heat exchanger. Close the bypass valve once the water is properly balanced. Failure to close the bypass valve when attempting to operate the heater will result in extensive damage to the heat exchanger. Ensure water flow through the heater is restored before operating the heater. A bypass feature is also advantageous for service needs and for the ability to remove the heater from the water path when not heating. Refer to page 26 for further information. USE ONLY HAYWARD GENUINE REPLACEMENT PARTS Pomona, CA Clemmons, NC Nashville, TN Tel: 908-351-5400 www.haywardpool.com