Daikin UAA-ST3M, Installation & Maintenance Manual

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26 | P a g e
𝑚𝑔(𝐶𝑙
−
)/L
𝑚𝑔(𝑆𝑂
2−
4
)/L
𝑚𝑔(𝐶𝑎𝐶𝑂
3
)/L
𝑚𝑔(𝐹𝑒 )/L
𝑚𝑔(𝑆
2−
)/L
Daikin recommends a water quality that meets the following standards:
Item Reference value
Tendency
Corrosion Softening
pH value (25°C)
-
7.5~9.0
Electric conductivity (25°C) µS/cm <800
<200
<200
Acid consumption (pH=4.8) <100
Full hardness <200
<1.0
no containing
<1.0
<50
Note:
Stands for factors of corrosion and softening tendency
𝑆𝑂
4
2−
𝐶𝑙
−
𝑆
2−
𝑁𝐻
4
+
𝑆𝑖𝑂
2
𝐹𝑒
𝑚𝑔(𝐶𝑎𝐶𝑂
3
)/L
𝑚𝑔(𝑁𝐻
4
+
)/L
𝑚𝑔(𝑆𝑖𝑂
2
)/L