Magic Aire HCA 04, Installation, Operation And Maintenance Manual

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035-000049-001 Page 24 HCA IOM 1.1 8-28-2017
Introduction:
Condition
pH 7 to 9
Total Hardness
Calcium and magnesium carbonate should not exceed 20
grains per gallon (350 ppm).
Iron Oxides < 1 ppm.
Iron Bacteria No level allowable.
Brackish
Calcium or sodium chloride concentrations ≤ 125 ppm.
(Seawater is approximately 25,000 ppm)
Sediment/Solids
Provide ≤ 800 micron filtration on open loop or ground
source systems.
Ammonia, Ammonium Hydroxide
0.5 ppm max.
Ammonium Chloride, Ammonium Nitrate 0.5 ppm max.
Ammonium Sulfate 0.5 ppm max.
Chlorine/Chlorides 0.5 ppm max.
Hydrogen Sulfide
2
None Allowable
NOTES:
1. If the concentration of these corrosives exceeds the maximum allowable level, then the
potential for serious corrosion problems exists.
2. Sulfides in the water quickly oxidize when exposed to air, requiring that no agitation occur as
the sample is taken. Unless tested immediately at the site, the sample will require stabilization
with a few drops of one Molar zinc acetate solution, allowing accurate sulfide determination up to
24 hours after sampling. A low pH and high alkalinity cause system problems, even when both
values are within ranges shown. The term pH refers to the acidity, basicity, or neutrality of the
water supply. Below 7.0, the water is considered to be acidic. Above 7.0, water is considered to
be basic. Neutral water contains a pH of 7.0.
3. To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equivalent to ppm.
For Heat Exchanger Coils with Copper Tubes
Magic Aire Water Quality Guidelines
Acceptable Level
Corrosion
1
Poor cooling/heating water quality can cause serious problems. Ground source
or open loop water quality varies and therefore should be tested to determine
suitability for use with Magic Aire equipment. Test water for hardness, acidity
and iron content before the equipment is installed. Poor water quality can cause
one or more of the following problems: mineral deposits, sediment deposits or
corrosion. These problems will result in fouling, contamination or damage to
water coils and may render them inoperable or inefficient. It is the responsibility
of the customer to insure that the water quality meets or exceeds water quality
specifications prescribed in Table 1.
Table 1