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THERMA V
Split Type
4. Water Control
4.1 Water quality
Water quality should be complied with EN 98/83 EC Directives.
Detailed water quality condition can be found in EN 98/83 EC Directives.
CAUTION
•
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.
4.2 Frost protection
In areas of the country where entering water temperatures drop below 0 °C, the water pipe must be protected by
using an approved antifreeze solution. Consult your heat pump unit supplier for locally approved solutions in your
area.
Calculate the approximate volume of water in the system. And add the water volume contained in the heat pump
to this total volume.
Antifreeze type
Methanol
Ethylene glycol
Propylene glycol
CAUTION
•
Use only one of the above antifreeze.
•
If a antifreeze is used, pressure drop and capability degradation of the system can be occurred.
•
If one of antifreezes is used, corrosion can be occurred. So please add corrosion inhibitor.
•
Please check the concentration of the antifreeze periodically to keep same concentration.
•
When the antifreeze is used (for installation or operation), take care to ensure that antifreeze must not be
touched.
•
Ensure to respect all laws and norms of your country about antifreeze usage.
Antifreeze mixing ratio (by volume)
0°C
-5°C
0%
6%
0%
12%
0%
17%
-10°C
-15°C
12%
16%
20%
30%
25%
33%
Design and installation
-20°C
-25°C
24%
30%
-
-
-
-
5
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