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Bosch Compress 3400i AWS Manual

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Regulations
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Compress 3400i AWS – 6721852066 (2023/01)
If the limits for water hardness stated in table 3 are exceeded, the
performance of the heat pump will deteriorate over time. If this
performance degradation can be accepted, the limits in figure 1 are
required to ensure the operation of the heat pump throughout its entire
service life.
Table 4 Table for heat pumps
Fig. 1 Limits for water treatment in heat pump systems
A Use completely de-mineralized fill water above the curve,
conductivity ≤ 10 microsiemens /cm.
B Use untreated tap water below the curve. Fill according to the
drinking water regulation.
HwWater hardness.
V Total water volume: fill volume of the heating system and top-up
volume over the service life of the heat pump.
If the total water volume is above the limit curve in the diagram (Fig. 1)
suitable measures are required for water treatment.
Suitable measures are:
• Use of fully de-mineralized fill water with a conductivity of ≤ 10
microsiemens / cm.
To prevent oxygen from entering the heating water, the expansion vessel
must be adequately dimensioned.
When installing diffusion open pipes, a system separation with the help
of a heat exchanger is required.
Heat pump
output [kW]
Total alkalinity
/ total hardness
of the filling
water [°dh]
Maximum fill and top-up water
volume Vmax [m3]
Q < 50 Requirements
according to
figure 1
Requirements according to
figure 1
0,00
0,20
0,40
0,60
0,80
1,00
1,20
1,40
1,60
1,80
2,00
2,20
2,40
2,60
0 5 10 15
0010036248-002
V [m
3
]
H
W
[°dH]
A
B
… 5 …


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