HRX-OM-R039
Chapter 9
Product Warranty
Control, Inspection and Cleaning
HRSE 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)
Item
Product
Standard value
For circulating fluid
Standard item
pH (at 25
o
C)
－
6.0 to 8.0
Electric conductance (at 25
o
C)
[μS/cm]
100 to 300
Chloride ion
[mg/L]
50 or less
Sulfuric acid ion
[mg/L]
50 or less
Acid consumption (at pH 4.8)
[mg/L]
50 or less
Total hardness
[mg/L]
70 or less
Calcium hardness
[mg/L]
50 or less
Ion silica
[mg/L]
30 or less
Referential
item
Iron
[mg/L]
0.3 or less
Copper
[mg/L]
0.1 or less
Sulfide ion
[mg/L]
Not detected
Ammonium ion
[mg/L]
0.1 or less
Residual chlorine
[mg/L]
0.3 or less
Separation carbonic acid
[mg/L]
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.
