Water Quality - Johnson Controls RJ H Series Installation Operation & Maintenance

RJ SERIES INSTALLATION MANUAL

Water Quality

In ground water situations where scaling could be heavy or where biological growth such as iron bacteria will be present, a closed loop
system is recommended. The heat exchanger coils in ground water systems may, over a period of time, lose heat exchange capabilities
due to a buildup of mineral deposits inside. These can be cleaned, but only by a qualified service mechanic, as special solutions and
pumping equipment are required. Hot water generator coils can likewise become scaled and possibly plugged. In areas with extremely
hard water, the owner should be informed that the heat exchanger may require occasional flushing.
Units with cupronickel heat exchangers are recommended for open loop applications due to the increased resistance to build-up and
corrosion, along with reduced wear caused by acid cleaning.
Material
pH Acidity/Alkalinity
Scaling Calcium and Magnesium Carbonate
Hydrogen Sulfide
Carbon Dioxide
Corrosion
Ammonia Chloride
Ammonia Nitrate
Ammonia Hydroxide
Ammonia Sulfate
Total Dissolved Solids (TDS)
Iron, Fe
Bacterial Iron Potential
Iron Fouling
(Biological Growth)
Suspended Solids
Erosion
Threshold Velocity (Fresh Water)
Grains = PPM divided by 17 • mg/l is equivalent to PPM
(Total Hardness) less than 350 ppm
Less than .5 ppm (rotten egg smell
appears at 0.5 PPM)
Sulfates Less than 125 ppm
Chlorine Less than .5 ppm
Chlorides Less than 20 ppm
Less than 50 ppm
Ammonia Less than 2 ppm
Less than .5 ppm
Less than .5 ppm
Less than .5 ppm
Less than .5 ppm
Less than 1000 ppm
LSI Index
+ (Ferrous)
2
Less than 1 ppm. Above this level
Iron Oxide
deposition will occur.
Less than 10 ppm and filtered for max of
600 micron size
Copper 90/10 Cupro-Nickel
7- 9
(Total Hardness) less than 350 ppm
Less than 125 ppm
Less than125 ppm
+0.5 to -.05
< .2 ppm
Less than 1 ppm. Above this level
deposition will occur.
Less than 10 ppm and filtered for max of
< 6 ft/sec
12
7 - 9
(Total Hardness) less than 350 ppm
10 - 50 ppm
Less than .5 ppm
10 - 50 ppm
Less than 2 ppm
Less than .5 ppm
Less than .5 ppm
Less than .5 ppm
Less than .5 ppm
1000-1500 ppm
+0.5 to -.05
< .2 ppm
Less than 1 ppm. Above this level
Less than 10 ppm and filtered for max of
600 micron size
< 6 ft/sec
316 Stainless Steel
7 - 9
Less than 1 ppm
Less than 200 ppm
Less than .5 ppm
Less than 300 ppm
10- 50 ppm
Less than 20 ppm
Less than .5 ppm
Less than .5 ppm
Less than .5 ppm
Less than .5 ppm
1000-1500 ppm
+0.5 to -.05
< .2 ppm
deposition will occur.
600 micron size
< 6 ft/sec
2/8/08