Water Quality In Heating Systems; Minimum And Maximum Heating Water Flow Rate - Dimplex La 4060Cp Montage- Und Betriebsanleitung

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7.2.2

Water quality in heating systems

!
NOTICE
Damage due to unsuitable filling and additional water
Unsuitable filling and additional water can lead to deposits and corrosion. This can reduce the performance of the heat
pump or cause damage to the system.
The system installer is responsible for the water quality.
Do not use antifreeze (e.g. water / glycol mixture) in the heating water.
Flush the heating system before filling.
The filling water must meet drinking water standards and must comply with VDI 2035. The following limit values must
also be observed:
Evaluation characteristic
Electrical conductivity (saline operation)
Electrical conductivity (low-salt operation)
pH value
Total hardness
Chloride ions (Cl
Iron (Fe)
Hydrogen carbonate/sulphate (HCO
Filterable materials
Values stipulated in VDI2035 are applicable
1.
When using demineralised water, ensure that the pH value is above the minimum permissible value of 8.2. Failure to comply with this value
2.
can result in the heat pump being destroyed.
3. Check operation after 12 weeks at the latest.
Before filling the system, obtain information about the drinking water quality from the local water supply company. In
many regions the local water supply company's website provide an insight into water hardness, pH value and a range of
other constituent substances.
!
Check the water quality 10 to 12 weeks after filling / commissioning.
Document the filling water conditioning, water quality and any actions taken in the system handbook.
7.2.3

Minimum and maximum heating water flow rate

The minimum heating water flow of the heat pump must be ensured for every heating system operating status, e.g. by
installation of a double differential pressureless manifold. The maximum flow rate must not be exceeded. Guarantee the
specified nominal flow rate for every operating status } Device information [12, p. 37] . A built-in flow rate sensor
monitors the necessary minimum flow rate.
EN 24
•
-
)
- 2-
/SO )
3 4
452173.66.03c
Unit
µS/cm
µS/cm
°dH
mg/l or ppm
mg/l or ppm
mg/l
FD 0509
•
LA 4060CP
Concentration range
1
100 - 500
1
< 100
1 2 3
8.2 - 9.5
3.5 - 8.4
< 20
1
< 0.2
> 1.0
< 30
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