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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 permissi-
ble. Your local water utility can provide you with general informa-
tion regarding the possible use of ground water. Water analyses
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]
Approximate
Evaluation characteris-
concentration
tic
range (mg/l)
Substances that can settle (org.)
Ammonia NH
3
Chloride
Electrical conductivity
10 to 500 S/cm
Iron (Fe), dissolved
Free (aggr.) carbonic acid
Manganese (Mn), dissolved
Nitrate (NO
), dissolved
3
PH value
Oxygen
Hydrogen sulphide (H
S)
2
2
HCO
-/SO
-
3
4
Hydrogen carbonate (HCO
-)
3
Aluminium (Al), dissolved
Sulphate
Sulphite (SO
), free
3
Chlorine gas (Cl
)
2
EN-9
Evaluation of
the copper
0
< 2
+
2 to 20
0
> 20
-
< 300
+
> 300
0
< 10 S/cm
0
+
> 500 S/cm
-
< 0.2
+
> 0.2
0
< 5
+
5 to 20
0
> 20
-
< 0.1
+
> 0.1
0
< 100
+
> 100
0
< 7.5
0
7.5 to 9
+
> 9
0
< 2
+
> 2
0
< 0.05
+
> 0.05
-
> 1
+
< 1
0
< 70
0
70 to 300
+
> 300
0
< 0.2
+
> 0.2
0
< 70
+
70 to 300
0
> 300
-
< 1
+
< 1
+
1 to 5
0
> 5
-
452237.66.10 · FD 9603
9.5 Maintenance
Refrigeration circuits with a minimum refrigerant fill quantity of
3 kg, or "hermetically sealed" refrigeration circuits with at least
6 kg, must be tested for leaks yearly by the operator according to
regulation (EC) No. 842/2006.
The leakage tightness test is to be documented and archived for
a minimum of 5 years. The test is to be carried out by certified
personnel only, according to regulation (EC) No. 1516/2007. The
table enclosed in the appendix can be used as a basis for the
documentation.
ATTENTION !
Local regulations may differ from EU directive 842/2006. The appropriate
local regulations for heat pump leakage tightness test must be observed.
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 in-
dicated on the heat pump manager display. In this case, consult
the "Faults and troubleshooting" page in the operating instruc-
tions 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. Partic-
ular attention should be paid to the proper disposal of refrigerants
and refrigerant oils.
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