Water Quality Standards - Heat Controller HTV Series Installation, Operation & Maintenance Instructions Manual

Heat Controller, Inc.
Notes:
• Closed Recirculating system is identified by a closed pressurized piping system.
• Recirculating open wells should observe the o

Water Quality Standards

considerations.
Table 3: Water Quality Standards
Water Quality
Parameter
Scaling Potential - Primary Measurement
Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limit
pH Calcium
Hardness Method
Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended)
Scaling indexes should be calculated at 150°F operation for direct use and HWG applications, and at 90°F for indirect HX use. A monitoring
plan should be implemented.
Ryznar Stability Index
Langelier Saturation
Index
Iron Fouling
Iron Fe (Ferrous)
(Bacterial Iron Potential)
Iron Fouling
Corrosion Prevention
pH
Hydrogen Sulfide (H
Ammonia ion as
Hydroxide, Chloride,
Nitrate and Sulfate
Compounds
Maximum Chloride Levels
Erosion and Clogging
Particulate Size & Erosion
Notes:
• Closed Recirculating system is identified by a closed pressurized piping system.
• Recirculating open wells should observe the open recirculating design
HTV/HTD/HTH SERIES
WATER QUALITY STANDARDS
pen recirculating design
HX Material Closed Recirculating
All
All
All
All
All
All
Monitor/treat as needed
S) All
2
All
Copper
Cupro Nickel
304 SS
316 SS
Titanium
<10 ppm of particles and a
maximum velocity of 6 fps filtered
All
for maximum 800 micron (800mm,
- pH ‹7.5 and Ca Hardness ‹100ppm
-
- If <-0.5 minimize steel pipe use. Based upon 150°F
-
If Fe (ferrous) >0.2 ppm with pH 6 - 8, ppm check for
-
6 - 8.5
Minimize steel pipe below 7 and no open tanks with pH <
At H S>0.2 ppm, avoid use of copper and copper nickel
2
-
Copper alloy (bronze or brass) cast components are okay
-
Maximum Allowable at maximum water temperature
50°F
- <20 ppm
- <150 ppm
- <400 ppm
- <1000 ppm
- <1000 ppm
20 mesh) size
Notes:
19
•
•
22
Open Loop and Recirculating Well
6.0 - 7.5
If >7.5 minimize steel pipe use
-0.5 to +0.5
Direct well, 85°F Indirect Well
<0.2 ppm (Ferrous)
<0.5 ppm of Oxygen
Above this level deposition will occur
6 - 8.5
<0.5 ppm
Rotten egg smell appears at 0.5 ppm level
<0.5 ppm
75°F
NR
NR
<250 ppm
<550 ppm
<550 ppm
NR - Application not recommended
"-" No design maximum
100°F
NR
NR
<150 ppm
<375 ppm
<375 ppm