Installation manual

11
ENVISION SERIES INSTALLATION MANUAL
Solenoid Wiring
Water control valves draw their power directly from a unit’s 24V transformer and can overload and possibly burn out the
transformer. Check total VA draw of the water valve and ensure that it is under 15 VA.
Water Quality
In ground water situations where scaling could be heavy or where biological growth such as iron bacteria will be pres-
ent, 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 qualied
service mechanic, as special solutions and pumping equipment are required. Desuperheater 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 ushing.
Open Loop - Well Water Systems (continued)
Material Copper 90/10Cupro-Nickel 316StainlessSteel
pH Acidity/Alkalinity 7-9 7-9 7-9
Scaling Calcium and Magnesium Carbonate (Total Hardness) less than 350 ppm (Total Hardness) less than 350 ppm (Total Hardness) less than 350 ppm
Corrosion
Hydrogen Sulde
Less than .5 ppm (rotten egg smell
appears at 0.5 PPM)
10 - 50 ppm Less than 1 ppm
Sulfates Less than 125 ppm Less than 125 ppm Less than 200 ppm
Chlorine Less than .5 ppm Less than .5 ppm Less than .5 ppm
Chlorides Less than 20 ppm Less than125 ppm Less than 300 ppm
Carbon Dioxide Less than 50 ppm 10 - 50 ppm 10- 50 ppm
Ammonia Less than 2 ppm Less than 2 ppm Less than 20 ppm
Ammonia Chloride Less than .5 ppm Less than .5 ppm Less than .5 ppm
Ammonia Nitrate Less than .5 ppm Less than .5 ppm Less than .5 ppm
Ammonia Hydroxide Less than .5 ppm Less than .5 ppm Less than .5 ppm
Ammonia Sulfate Less than .5 ppm Less than .5 ppm Less than .5 ppm
Total Dissolved Solids (TDS) Less than 1000 ppm 1000-1500 ppm 1000-1500 ppm
LSI Index +0.5 to -.05 +0.5 to -.05 +0.5 to -.05
IronFouling
(Biological Growth)
Iron, Fe²+ (Ferrous)
Bacterial Iron Potential
< .2ppm < .2 ppm < .2 ppm
Iron Oxide
Less than 1 ppm. Above this level
deposition will occur.
Less than 1 ppm. Above this level
deposition will occur.
Less than 1 ppm. Above this level
deposition will occur.
Erosion
Suspended Solids
Less than 10 ppm and ltered for
max of 600 micron size
Less than 10 ppm and ltered for
max of 600 micron size
Less than 10 ppm and ltered for
max of 600 micron size
Threshold Velocity (Fresh Water) < 6 ft/sec < 6 ft/sec <6 ft/sec
2/8/08
NOTE: Grains = PPM divided by 17 mg/l is equivalent to PPM