© 2008 Aqua-Hot
®
600-D Hydronic Heating System Installation Manual
— Page E-1 —
appendix E: antifreeze Mixture Water Quality
Antifreeze Mixture Water Quality:
In order to ensure maximum performance and longev-
ity of an Aqua-Hot heating system’s boiler tank and
associated components, it has been determined that
there is a need to use distilled, de-ionized, or soft water
in combination with concentrated propylene glycol for
the Aqua-Hot’s antifreeze and water heating solution.
Please note that this is only necessary when mixing
concentrated propylene glycol antifreeze with water;
suppliers of pre-mixed antifreeze are responsible for
the use of high-quality (distilled, de-ionized, or soft)
water when preparing their antifreeze for sale.
Hard water possesses a high-level of calcium and
magnesium ions, which deplete the propylene glycol an-
tifreeze’s corrosion inhibitors. This, in turn, causes the
antifreeze and water heating solution to begin turning
acidic, which can corrode the Aqua-Hot’s Boiler tank
and associated components prematurely. Therefore,
concentrated propylene glycol should be diluted with
distilled, de-ionized, or soft water which is 80 ppm or
less in total hardness. The local water agency should
have up-to-date water quality reports which should
indicate if the local tap water is within this guideline.
Summary of Contents for 600-D
Page 1: ...2008 Aqua Hot Heating Systems Inc Installation Manual...
Page 43: ...Appendix B Appendix B Wire Gauge Information...
Page 45: ...Appendix C Appendix C Electronic Controller Features...
Page 48: ...Appendix D Appendix D Antifreeze Types...
Page 50: ...Appendix E Appendix E Antifreeze Mixture Water Quality Recommendations...
Page 52: ...Appendix F Appendix F Antifreeze Terms and Mixture Ratio...
