Everybody seems to like it. Despite it being expensive, I was wondering if I should consider it if/when my conventional gas unit fails. Efficient. Can draw combustion air from outside. No anode needed. I see now that I can remove it from consideration.
http://www.htproducts.com/literature/lp-441.pdf is the installation guide. Page 10 has these requirements:
I don't understand the "water is being over softened " thing. What do you suppose that is about?
Note that the Westinghouse Premium water heaters are the same. They even have the same rules in their installation manual: http://www.westinghousewaterheating.com/literature/whl-001.pdf
http://www.htproducts.com/literature/lp-441.pdf is the installation guide. Page 10 has these requirements:
- Water pH between 6.5 and 8.5
- pH levels below 6.5 can cause an increase in the rate of corrosion.
- pH of 8.5 or higher can potentially cause lime scale build-up
- Maintain water pH between 6.5 and 8.5. Check with litmus paper or have it chemically analyzed by a local water treatment company.
- If the pH is not between 6.5 and 8.5, consult a local water treatment company for solutions.
- Hardness less than 12 grains (200 mg/L) (Residential Use - water temperatures below 140oF)
- Hardness less than 7 grains (120 mg/L) (Commercial Use - water temperatures of 140oF and greater)
- Hardness levels above the required amounts can lead to lime scale build-up throughout the system. Water below 5 grains/ gallon (85 mg/L) may be over softened.
- Consult local water treatment companies for unusually hard water areas (above the required amounts) or for other treatment solutions if water is being over softened (below 5 grains/gallon [85 mg/L]).
- Chloride concentration less than 100 ppm (mg/L)
- Do not fill appliance or operate with water containing chlorides in excess of 100 ppm (mg/L).
- Using chlorinated fresh water should be acceptable as levels are typically less than 5 ppm (mg/L).
- Do not connect the appliance to directly heat swimming pool or spa water.
- Total Dissolved Solids (TDS) less than 500 ppm (mg/L)
- Total dissolved solids are minerals, salts, metals, and charged particles that are dissolved in water.
- The greater the amounts of TDS present, the higher the corrosion potential due to increased conductivity in the water.
- If using softened water to fill the appliance, it is still possible to have high TDS. This water can be corrosive. Consult local water treatment companies for other treatment solutions to reduce this effect.
I don't understand the "water is being over softened " thing. What do you suppose that is about?
Note that the Westinghouse Premium water heaters are the same. They even have the same rules in their installation manual: http://www.westinghousewaterheating.com/literature/whl-001.pdf
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