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3.
Check whether the valve between the pump
and the flow rate control module is closed.
4.
If the valve is mounted on the outlet
c onnection piece check whether it is fully
opened.
5. O pen the vent and start the pump slowly.
6. Open the valve slowly.
7. C lose the vent when air is completely
removed.
8.
Repeat the steps 3-7 for the other medium.
3.2.
Requirements of water quality
Do not use the medium that causes corrosion in steel AISI 316L/304L
(1.4404/1.4307) or brazing material in the heat exchanger.
Based on VDI 2035 and only permissible in
respect of sealed heating and cooling sys‑
tems.
Deviating
individually checked as part of project planning.
Open systems are specified separately.
water pH (at 25°C/77°F)
electrical conductivity
(open systems)
electrical conductivity
(sealed systems)
free ammonia
carbon dioxide
iron
manganese
chlorine
nitrate
sulphate
total hardness
(open systems)
total hardness
(sealed systems)
free Chlorine
hydrogen sulfide
hydrogen carbonate
sulphates
sulphide
nitrite
free aggressive carbonic
acid
applications
must
7-10 (6-9 Luna
und Nickel-Lot)
10-500 µS/cm
10-1500 µS/cm
NH
3
CO
2
3+
Fe
2+
Mn
-
Cl
-
NO
3
2-
SO
4
up to 50°C: 15°dH
up to 60°C: 8.4°dH
0.1-16.8°dH
Dependent on the system
volume listed in VDI 2035
Cl
2
H
S
2
-
HCO
3
2-
SO
3
2-
S
-
NO
2
H
CO
2
3
Operation
be
<2.0 mg/l
<20 mg/l
<1.5 mg/l
<0.1 mg/l
Fig.10
<80 mg/l
<80 mg/l
<0.4 mg/l
<0.04 mg/l
<250 mg/l
<1.0 mg/l
<1 mg/l
<0.1 mg/l
<20 mg/l
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