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COMPREHENSIVE APPLICATION AND INSTALLATION MANUAL
LG Electronics
Installation check list
Configuration
System Design
Applications
Introduction
1.13 Check water quality
Items to check
Is quality of heat source water acceptable?
Result
Purpose
Protect product, secure flow
Applicants
Common
Water quality should be complied with EN 98/83 EC Directives.
Detailed water quality condition can be found in EN 98/83 EC Directives.
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 re-
move 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.
Use a simple measuring instrument or diagnose a sample to check water quality to verify the following.
Also check pH, TDS(Total dissolved Solid), and water quality by applying formula such as LSI(Langelier
saturation index).
1.14 Preventing freezing and bursting
Items to check
Is there an appropriate measure to prevent freezing and bursting of
flat heat exchanger in winter and is air vent valve installed on bent
part of water pipings? (Use antifreeze solution or operate either
pumps or auxiliary heater)?
Result
Purpose
Subjects of preventing freezing
Applicants
AWHP SPLIT, Monobloc
Antifreeze solution is needed to prevent freezing and bursting if outdoor temperature is too low or the
product is to be out of use for extended period.
Adjust amount of antifreeze solution based on the site's conditions. Check concentration of antifreeze
solution and add more solution if concentration is too weak to maintain a proper level.
Our own antifreeze logic is active by default but the protective logic may not work if the product fails, thus
other physical measures need to be considered.
Antifreezing mixing ratio (by volume)
Freezing point
0 °C
-5 °C
-10 °C
-15 °C
-20 °C
-25 °C
Ethylene glycol
0
12.8
22
29
33.5
38
propylene glycol
0
15.5
26
33
39
44
Ethanol
0
14
24.8
32
37.3
42.2
Indoor
Underfloor
Water piping is
buried underground
or exposed
Indoor
Indoor
Underfloor
Water piping is
buried underground
or exposed
Indoor
