LG THERMA V AHNW16606B0, Installation Manual, Page: 33 / 65

Installation Manual 33
ENGLISH
Installation of Indoor Unit
To prevent damage to the components of the hydraulic system, we recommend the additional
installation of Micro-bubble venting system.
The micro bubbles in the system forms larger bubbles which eventually can cause corrosion of the
system, result in system component malfunction and operation disturbance.
The table below represents the maximal allowed content of individual substances in the heating
water and the influence of these on the heat exchanger. Do not use the heating water that contains
any substance in concentrations ;resulting in corrosion of the heating system (influence “-”). Do not
use heating water that contains two or more substances in concentrations ;resulting in corrosion in
the heating system (influence “0”).
Table: Influence of various aggressive substances in the heating water based up on the stability of
stainless copper welded plate transmitters. (+ = no influence, 0 = danger of corrosion, - = corrosion -
use not permitted).
The heating system has to be filled with water with the hardness scale between 5 °dH and 10 °dH.
Malfunctions of the device caused by water hardness is not covered by the warranty.
TYPE OF PRESENT
SUBSTANCE
UNIT CONCENTRATION
INFLUENCE TO THE HEAT
CONDUCTOR
‘Organic sediment mg / L 0
Ammonia NH
3
mg / L
< 2 +
1 to 20 0
> 20 -
Chloride mg / L
< 300 +
> 300 0
Allowed water hardness °dH 5 – 10
Electrical conductivity µS / cm
< 10 0
10 to 500 +
> 500 -
Iron (Fe) removed mg / L
< 0.2 +
> 0.2 0
Free carbonic acid mg / L
< 5 +
5 to 20 0
> 20 -
Manganese (Mn) removed mg / L
< 0.1 +
> 0.1 0
Nitrates (NO
3
) removed mg / L
< 100 +
> 100 0
pH value mg / L
< 7.5 0
7.5 to 9 +
> 9 0
Oxygen mg / L
< 2 +
> 2 0
Hydrogen sulphide (H
2
S) mg / L
< 0.05 +
> 0.05 -
HCO3- / SO
4
2
- mg / L
> 1 +
< 1 0
Hydrogen carbonate mg / L
< 70 0
70 to 300 +
> 300 0
Aluminium (Al) removed mg / L
< 0.2 +
> 0.2 0
Sulphates mg / L
< 70 +
70 to 300 0
> 300 -
Sulphite (SO
3
) mg / L < 1 +
Chlorine (gas) (Cl
2
) mg / L
< 1 +
1 to 5 0
> 5 -