SMC Networks HRSH250-W*-20 Series

HRX-OM-Q026
Chapter 7 Control, Inspection and Cleaning
HRSH Series 7.1 Quality Control of Circulating Fluid and Facility Water
7-1
Chapter 7 Control, Inspection and
Cleaning
7.1 Quality Control of Circulating Fluid and Facility
Water
Table 7-1 Quality criteria for clean water (tap water)
Item
Unit
Criterion
Circulating fluid
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
Sulphate 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
Ionic 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]
Should not be
detected any
Should not be
detected any
Ammonium ion
[mg/L]
0.1 or less
1.0 or less
Residual chlorine
[mg/L]
0.3 or less
0.3 or less
Free carbon dioxide
[mg/L]
4.0 or less
4.0 or less
Quoted from the standard “JRA-GL-02-1994”, The Japan Refrigeration and Air Conditioning Industry
Association.
Replace the circulating fluid and/or the facility water if any problems
are found in the regular check. Even if no problems are found, some of
the water in the tank evaporates and impurity concentration in the
circulating fluid increases. Replace the circulating fluid on the tank
once in every 3 months. Refer to the section "7.2 Inspection and
Cleaning" for regular inspection.
Use specified fluids only. If other fluids are used, they may damage the
product, causing fluid leakage, or result in hazards such as electric
shock or leakage of electricity.
When using clear water (tap water), ensure that it satisfies the water
quality criteria shown in the table below.