Water Quality Management - Orion RKS250F-S Operation Manual

1. Chilled water should be either clean water (tap water) or a 10% or weaker solution of industrial use
ethylene glycol in water. Use of non-approved water can result in damage to the product, leaking, and
possible electric shock or electrical shorts.
Refer to the following chart for information regarding the standard quality guidelines for clean (tap)
water.
■ Water Quality Control of Clean Water
Conductivity
Chloride ion
Standard
components
Acid consumption
Total hardness
Calcium hardness
Reference
components Ammonium ion
Residual chlorine
Free carbon dioxide
Excerpt from JRA-GL-02-1994 guidelines from The Japan Refrigeration and Air Conditioning Industry Association.
2. If a problem is found after a regular inspection of the water circuit, clean the water tank and water
circuit and replace the water in the tank as necessary. Even if no abnormalities are noticed,
evaporation will occur and concentration of impurities will increase. Therefore the water in the water
tank should be replaced once every 3 months. For further information on regular inspections, see the
section on, "Regular Inspections and Maintenance".

Water Quality Management

Item
pH
Sulphate
(pH4.8)(mgCaCO₃/L)
Silica ion
Iron
Copper
Sulfide ion
CAUTION
(25℃）
(25℃）（μS/cm）
(mgCl¯/L)
(mgSO₄²¯/L)
(mgCaCO₃/L)
(mgCaCO₃/L)
(mgSiO₂/L)
(mgFe/L)
(mgCu/L)
(mgS²¯/L)
(mgNH₄⁺/L)
(mgCl/L)
(mgCO₂/L)
25
Working water
6.8〜8.0
1〜400
Max. 50
Max. 50
Max. 50
Max. 70
Max. 50
Max. 30
Max. 1.0
Max. 1.0
Not detected
Max. 1.0
Max 0.3
Max. 4.0