Installation of Indoor Unit
30
Air-to-Water Heat Pump
In case of damage of the hydraulic components of the system, despite considering the listed guide-
lines for permitted substance content in the heated water, we recommend installing an additional
SpiroVent RV2 air (micro-bubble) venting system. The presence of micro bubbles in the system
eventually forms larger bubbles which in time can cause corrosion of the system, system compo-
nent malfunction and operation disturbance.
Maximal allowed content of individual substances in the heating water and the influence of these on
the heat exchanger are presented in the table below. It is not allowed to use heating water which
contains any substance in concentrations which cause corrosion in the heating system (influence
“-”). It is also not allowed to use heating water which contains two or more substances in concentra-
tions which could cause corrosion in the heating system (influence “0”).
Table: Influence of various aggressive substances in the heating water 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 between 5 °dH and 10 °dH. Mal-
functions of the device because of water hardness are 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
-
1,MFL69676201,영영 2017. 3. 8. 영영 3:07 Page 30