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Installation of Outdoor Unit
4. Water Control
4.1 Water quality
Water quality should be complied with EN 98/83 EC Directives.
<!> IMPORTANT
• If the product is installed at existing hydraulic water loop, it is important to clean hydraulic pipes to remove sludge and scale.
• Installing sludge strainer in the water loop is very important to prevent performance degrade.
• Chemical treatment to prevent rust should be performed by installer.
• It is strongly recommended to install an additional filter on the heating water circuit. Especially to remove metallic particles
from the heating piping, it is advised to use a magnetic or cyclone filter, which can remove small particles. Small particles
may damage the unit and will NOT be removed by the standard filter of the heat pump system.
• Water quality check should be implemented before completing the installation of system. Detailed guide can be found in the
table as below.
Water Contents
pH
Conductivity
TDS ( Total dissolved solids )
-
Alkalinity ( HCO
)
3
Total hardness
Iron (Fe)
2-
Sulphate ( SO
)
4
-
Nitrite ( NO
)
3
Free chlorine ( Cl
)
2
-
Chlorides ( Cl
)
71.4 ~ 151.7 (mg/L)
ppm
15℃
40℃
pH7
60℃
80℃
15℃
40℃
pH9
60℃
80℃
6
Value
7.5 ~ 9.0
10 ~ 500 μS/cm
8 ~ 400 ppm
60 ~ 300 (mg/L)
4 ~ 8.5 ˚dH
≤ 0.2 (mg/L)
≤ 100 (mg/L)
≤ 100 (mg/L)
≤ 1 (mg/L)
STS316
3,000
500
200
125
18,000
2,600
1,000
550
Installation
STS304
180
50
30
20
700
250
170
130
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