LG THERMAV ZHBW056A1, Manual, Page: 43 / 52

THERMA V
Monobloc Type
4. Water Control
6
Design and installation
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.
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 type
Antifreeze mixing ratio (by volume)
0°C -5°C -10°C -15°C -20°C -25°C
Methanol 0% 6% 12% 16% 24% 30%
Ethylene glycol 0% 12% 20% 30% - -
Propylene glycol 0% 17% 25% 33% - -