Installation, Operation & Maintenance | HEV/H SERIES | Heat Controller, Inc. |
|
|
|
WATER QUALITY STANDARDS
Table 3: Water Quality Standards
Water Quality Parameter
HX
Material
Closed
Recirculating
Open Loop and Recirculating Well
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
All
-
pH < 7.5 and Ca Hardness <100ppm
Index Limits for Probable Scaling Situations - (Operation outside these limits is not recommended)
Scaling indexes should be calculated at 66°C for direct use and HWG applications, and at 32°C for indirect HX use. A monitoring plan should be implemented.
Ryznar Stability Index
Langelier Saturation Index
All
All
-
-
6.0 - 7.5
If >7.5 minimize steel pipe use.
If
Iron Fouling
Iron Fe 2+ (Ferrous) (Bacterial Iron potential)
Iron Fouling
All
All
-
-
<0.2 ppm (Ferrous)
If Fe2+ (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 .
Corrosion Prevention
pH
Hydrogen Sulfide (H2S)
Ammonia ion as hydroxide, chloride, nitrate and sulfate compounds
Maximum
Chloride Levels
All
All
All
Copper
Cupronickel
304SS
316SS
Titanium
6 - 8.5
Monitor/treat as
needed
-
-
-
-
-
-
-
6 - 8.5
Minimize steel pipe below 7 and no open tanks with pH <8
<0.5 ppm
At H2S>0.2 ppm, avoid use of copper and copper nickel piping or HX's. Rotten egg smell appears at 0.5 ppm level.
Copper alloy (bronze or brass) cast components are OK to <0.5 ppm.
<0.5 ppm
Maximum Allowable at maximum water temperature.
10∃C | 24∃C | 38 C |
<20ppm | NR | NR |
<150 ppm | NR | NR |
<400 ppm | <250 ppm | <150 ppm |
<1000 ppm | <550 ppm | < 375 ppm |
>1000 ppm | >550 ppm | >375 ppm |
Erosion and Clogging
Particulate Size and
Erosion
All
<10 ppm of particles and a maximum velocity of 1.8 m/s Filtered for maximum 841 micron [0.84 mm, 20 mesh] size.
<10 ppm (<1 ppm "sandfree” for reinjection) of particles and a maximum velocity of 1.8 m/s. Filtered for maximum 841 micron 0.84 mm,
20 mesh] size. Any particulate that is not removed can potentially clog components.
The ClimateMaster Water Quality Table provides water quality requirements for ClimateMaster coaxial heat exchangers. When water properties are outside of those requirements, an external secondary heat exchanger must be used to isolate the heat pump heat exchanger from the unsuitable water. Failure to do so will void the warranty for the coaxial heat exchanger.
Notes:
&ORVHG5HFLUFXODWLQJV\VWHPLVLGHQWLILHGE\Dclosed pressurized piping system.
5HFLUFXODWLQJRSHQZHOOVVKRXOGREVHUYHWKHRSHQUHFLUFXODWLQJGHVLJQFRQVLGHUDWLRQV
15Application not recommended.
1RGHVLJQ0D[LPXP
Rev.: 3/22/2012
18
