Vaillant geoTHERM SERIES, Руководство по установке, Страница: 15 / 132

Installation
Installation instructions geoTHERM 0020051574_04
15
4
(unsuitable) appears in the “Stainless Steel” column or if
the property “
à
” appears three times, operation with an
intermediate circuit is not permitted.
When water from lakes and ponds is used, an intermediate
circuit must always be installed. The intermediate circuit
must be filled with brine fluid (30 % mixture).
Water components Concentration
in mg/l
Copper Stainless
steel
(1.4401)
Iron, dissolved
Fe ** < 0.2
> 0.2
¨
¯
**
¨
¨
Manganese, dissolved
Mn ** < 0.1
> 0.1
¨
¯
**
¨
¨
Aluminium, dissolved
Al < 0.2
> 0.2
¨
à
¨
¨
Hydrogen sulphide
H
2
S
< 0.05
> 0.05
¨
¯
¨
¨
Sulphide
SO
3
< 1
¨ ¨
Chlorine gas, free
Cl
2
< 0.5
0.5 - 5
> 5
¨
à
/
¯
¯
¨
¨
à
/
¯
Ammonia
NH
3
< 2
2 - 20
> 20
¨
à
¯
¨
¨
¨
Carbonic acid,
free aggressive
CO
2
< 5
5 - 20
> 20
¨
à
¯
¨
¨
¨
Oxygen
O
2
< 2
> 2
¨
à
¨
¨
Sulphate
[SO
4
]
2-
< 70
70 - 300
> 300
¨
à
/
¯
¯
¨
¨
¯
Hydrogen carbonate
HCO
3
-
< 70
70 - 300
> 300
à
¨
à
¨
¨
¨
Ratio
HCO
3
-
/[SO
4
]
2-
<1.0
>1.0
à
/
¯
¨
¨
¨
Chloride
Cl
-
< 300
> 300
¨
à
¨
à
Nitrate, dissolved
NO
3
< 100
> 100
¨
à
¨
¨
Optical characteris-
tics *** Limit value Clear,
colour-
less Clear,
colour-
less
Water
overall hardness 4.0 - 8.5 °dH
¨ ¨
pH value < 6.0
6.0 - 7.5
7.5 - 9.0
> 9.0
à
à
¨
à
à
à
/
¨
¨
¨
Electrical conductivity
(at 20 °C)
<10
m
S/cm
10 - 500
m
S/cm
>500
m
S/cm
à
¨
¯
¨
¨
¨
4.2 Well water quality limit values
¨
= Resistance normally good
à
= Danger of corrosion; if several criteria are rated with
à
: critical
¯
=unsuitable
**) To prevent the sedimentation of iron ochre, especially in the
absorbing well, a limit value of < 0.2 mg/litre for iron (Fe) and
< 0.1 mg/litre for manganese (Mn) must be observed.
***) Cloudiness or settleable substances must not be present in the
groundwater, irrespective of the statutory regulations.
Extremely fine dirt particles that lead to clouding of the water
also cannot be eliminated by filters. They may therefore accu-
mulate in the evaporator and adversely affect the heat transfer
performance.