Installation; Water Control; Water Quality; Frost Protection - LG Therma V AHUW056A3 Engineering Product Data Book

THERMA V
Split Type

9. Installation

9.1 Water Control

9.1.1 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 removed by the standard filter of the heat pump
system.

9.1.2 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 AWHP unit supplier for locally approved solutions in your area.
Calculate the approximate volume of water in the system. (Except the AWHP unit.) And add the water volume
contained in AWHP unit to this total volume.
Antifreeze type
Ethylene glycol
Propylene glycol
Methanol
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 Anti-freeze usage.
Antifreeze mixing ratio (by volume)
0°C -5°C
0% 12%
0% 17%
0% 6%
-10°C -15°C
20% 30%
25% 33%
12% 16%
Hydro Box Unit
-20°C -25°C
- -
- -
24% 30%
15