HRX-OM-R026
Chapter 8 Control, Inspection and Cleaning
HRSH Series
8.1
Control of Circulating Fluid, facility water Quality
8-1
Chapter 8 Control, Inspection and
Cleaning
8.1 Control of Circulating Fluid, facility water Quality
Table 8-1 Quality standard for clean water (tap water)
Item
Unit
Standard value
For circulating
fluid
For facility water
Standard
item
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
Ion silica
[mg/L]
30 or less
50 or less
Referential
item
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
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 clean water (tap water) ensure that it satisfies the water
standard shown in the table below.
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 because
evaporation of the fluid causes concentrations of impurities. Refer to
the page containing "8.2 Inspection and Cleaning" for the regular
check.
