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WI 35TU - WI 45TU
9.4 .Water quality requirements
Irrespective of any legal regulations, the ground water should
not contain any substances that could form deposits. Iron
(< 0.2 mg/l) and Manganese (< 0.1 mg/l) limit values must be
adhered to to prevent iron ochre sedimentation from forming in
the heat source system.
The use of surface water or water containing salt is not permis-
sible. Your local water utility can provide you with general infor-
mation regarding the possible use of ground water. Water anal-
yses are carried out by specially-equipped laboratories.
Irrespective of any legal regulations, a water analysis must be
carried out to establish conclusively whether the ground water
is compatible for the evaporator of a heat pump (see table).
If one characteristic is negative “-” or two characteristics are
“0”, the water quality is not sufficient for the heat pump.
If the necessary water quality is not achieved or if this cannot be
guaranteed long-term, we recommended installing a brine-to-
water heat pump equipped with an intermediate circuit.
Table:
Resistance of copper-soldered stainless steel plate heat ex-
changers to substances contained in the water
+
Normally good resistance
0
Corrosion problems can arise,
particularly if several factors receive an evaluation of “0”
-
Should not be used
[<: less than, >: greater than]
10 Faults / troubleshooting
This heat pump is a quality product and is designed for trouble-
free operation. In the event that a fault should occur, it will be
indicated on the heat pump manager display. In this case, con-
sult the "Faults and troubleshooting" page in the operating in-
structions of the heat pump manager.
If you cannot correct the fault yourself, please contact your
after-sales service technician.
ATTENTION!
!!
Work on the heat pump must only be performed by
authorised and qualified after-sales service technicians!
ATTENTION!
!!
Disconnect all electrical circuits from the power source prior
to opening the device.
11 Decommissioning / disposal
Before removing the heat pump, disconnect it from the power
source and close all valves. The heat pump must be dismantled
by trained personnel.
All environmentally-relevant requirements regarding the recov-
ery, recycling and disposal of materials and components should
be observed in accordance with the applicable standards. Par-
ticular attention should be paid to the proper disposal of refrig-
erants and refrigerant oils.
Evaluation characteristic
Approximate
concentration
range (mg/l)
Evaluation of
the copper
Substances that can settle (org.)
0
Ammonia NH
3
< 2
2 to 20
> 20
+
0
-
Chloride
< 300
> 300
+
0
Electrical conductivity
< 10
S/cm
10 to 500
S/cm
> 500
S/cm
0
+
-
Iron (Fe), dissolved
< 0.2
> 0.2
+
0
Free (aggr.) carbonic acid
< 5
5 to 20
> 20
+
0
-
Manganese (Mn), dissolved
< 0.1
> 0.1
+
0
Nitrate (NO
3
), dissolved
< 100
> 100
+
0
PH value
< 7.5
7.5 to 9
> 9
0
+
0
Oxygen
< 2
> 2
+
0
Hydrogen sulphide (H
2
S)
< 0.05
> 0.05
+
-
HCO
3
-/SO
4
2
-
> 1
< 1
+
0
Hydrogen carbonate (HCO
3
-)
< 70
70 to 300
> 300
0
+
0
Aluminium (Al), dissolved
< 0.2
> 0.2
+
0
Sulphate
< 70
70 to 300
> 300
+
0
-
Sulphite (SO
3
), free
< 1
+
Chlorine gas (Cl
2
)
< 1
1 to 5
> 5
+
0
-
