HRX-OM-M090
Chapter 7 Control, Inspection and Cleaning
HRS Series 7.1 Control of Circulating Fluid Quality
7-1
Chapter 7 Control, Inspection and
Cleaning
7.1 Control of Circulating Fluid Quality
Table 7-1 Quality standard for fresh water (tap water)
Standard value
Item Product
For circulating fluid For facility water
pH (at 25
o
C)
－
6.0 to 8.0 6.5 to 8.2
Electric conductance
(at 25
o
C)
[μS/cm]
100 to 300 100 to 800
Chloride ion [mg/L]
50 or less 200 or less
Sulfuric acid ion [mg/L]
50 or less 200 or less
Acid consumption
(at pH 4.8)
[mg/L]
50 or less 100 or less
Total hardness [mg/L]
70 or less 200 or less
Calcium hardness [mg/L]
50 or less 150 or less
Standard
item
Ion silica [mg/L]
30 or less 50 or less
Iron [mg/L]
0.3 or less 1.0 or less
Copper [mg/L]
0.1 or less 0.3 or less
Sulfide ion [mg/L]
Not detected Not detected
Ammonium ion [mg/L]
0.1 or less 1.0 or less
Residual chlorine [mg/L]
0.3 or less 0.3 or less
Referential
item
Separation carbonic
acid
[mg/L]
4.0 or less 4.0 or less
∗ Quoted from JRA-GL-02-1994, The Japan Refrigeration and Air Conditioning Industry Association.
Use specified circulating fluids only. If other fluids are used, they may
damage the product or result in dangerous hazards.
When using fresh water (tap water) ensure that it satisfies the water
standard shown in the table below.
Clean the tank, circulating fluid circuit, and change the circulating fluid
in the tank if any problems are found during the regular check.
Additionally, even if no problems are found, it is necessary to change
the fluid once every 3 months in case evaporation of the fluid causes
concentration of impurities. Refer to the page containing "7.2
Inspection and Cleaning" for the regular check.
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