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

IOM Manual

Water Quality Standards

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 limits below
pH/Calcium Hardness
Method
Index Limits for Probable Scaling Situations -
Scaling indexes should be calculated at 150°F [66°C] for direct use and HWG applications, and at 90°F [32°C] for indirect HX use.
A monitoring plan should be implemented.
Ryznar
Stability Index
Langelier
Saturation Index
Iron Fouling
Iron Fe 2+ (Ferrous)
(Bacterial Iron potential)
Iron Fouling
Corrosion Prevention
pH
Hydrogen Sulfide (H S)
2
Ammonia ion as hydroxide, chloride,
nitrate and sulfate compounds
Maximum
Chloride Levels
Erosion and Clogging
Particulate Size and
Erosion
Notes:
• Closed Recirculating system is identified by a closed pressurized piping system.
• Recirculating open wells should observe the open recirculating design considerations.
• NR - Application not recommended.
• "-" No design Maximum.
HBH SERIES
HX Closed
Material Recirculating
-
All
(Operation outside these limits is not recommended)
-
All
-
All
-
All
-
All
6 - 8.5
All
Monitor/treat as
needed
-
All
-
All
Copper -
-
304 SS -
316 SS -
Titanium -
<10 ppm of particles
and a maximum
velocity of 6 fps [1.8 m/s].
All
Filtered for maximum
800 micron [800mm,
20 mesh] size.
Open Loop and Recirculating Well
pH < 7.5 and Ca Hardness <100ppm
If >7.5 minimize steel pipe use.
If <-0.5 minimize steel pipe use. Based upon 150°F [66°C] HWG and
Direct well, 85°F [29°C] Indirect Well HX
<0.2 ppm (Ferrous)
2+
If Fe (ferrous)>0.2 ppm with pH 6 - 8, O2<5 ppm check for iron bacteria.
<0.5 ppm of Oxygen
Above this level deposition will occur .
Minimize steel pipe below 7 and no open tanks with pH <8
At H S>0.2 ppm, avoid use of copper and copper nickel piping or HX's.
2
Rotten egg smell appears at 0.5 ppm level.
Copper alloy (bronze or brass) cast components are OK to <0.5 ppm.
Maximum Allowable at maximum water temperature.
50°F (10°C) 75°F (24°C)
<20ppm
<150 ppm
<400 ppm <250 ppm
<1000 ppm <550 ppm
>1000 ppm >550 ppm
<10 ppm (<1 ppm "sandfree" for reinjection) of particles and a maximum
velocity of 6 fps [1.8 m/s]. Filtered for maximum 800 micron [800mm,
20 mesh] size. Any particulate that is not removed can potentially
clog components.
17
Heat Controller, Inc.
6.0 - 7.5
-0.5 to +0.5
6 - 8.5
<0.5 ppm
<0.5 ppm
100°F (38°C)
NR NR
NR NR
<150 ppm
< 375 ppm
>375 ppm
Rev.: 6/2/2010