Water Quality And Water Treatment; Process Heat Application - DeDietrich C 340 Series Installation And User Manual

Tab.22 PCB connectors
Wire cross section
solid wire: 0.14 – 4.0 mm² (AWG 26 – 12)
stranded wire: 0.14 – 2.5 mm² (AWG 26 – 14)
stranded wire with ferrule: 0.25 – 2.5 mm² (AWG 24 – 14)
4.7

Water quality and water treatment

Tab.23 Water quality requirements
Heat exchanger material
Heat exchanger type
Property
Degree of acidity (untreated water)
Degree of acidity (treated water)
Conductivity at 25°C
Chlorides
Sulphates
Other components
Total water hardness (German)
Total water hardness (French)
Total water hardness (English)
CaCO3
4.8

Process heat application

7762666 - v.02 - 29092020
The quality of the heating water must comply with the limit values in the
table below. These guidelines must be followed at all times.
Unit
pH
pH
μS/cm
mg/l
mg/l
mg/l
°dH
°fH
°e
mmol/l
If water treatment is necessary, De Dietrich recommends the following
manufacturers:
Cillit
Fernox
Sentinel
Spirotech
In process heat applications (for example pasteurisation and drying and
washing processes), the boiler is being used for industrial purposes and
not for central heating. With process heat, the nominal flow (at ΔT 20°C) in
the primary CH circuit must be guaranteed. The flow in the secondary
circuit may vary.
To ensure that this is the case, a flow rate sensor can be fitted, which
locks out the boiler if the flow falls below a specified level (due to a
defective pump or valve, for example).
Important
The service life of the boiler may be reduced if it is used for
process heat applications.
4 Preparation of installation
Stripping length Tightening torque
8 mm 0.5 N⋅m
Aluminium
Sections
250 - 1300 kW
6.5 - 9.0
6.5 - 9.0
≤ 800
≤ 150
≤ 50
-
≤ 8.4
≤ 15.0
≤ 10.5
≤ 1.5
C 340 / C 640 27