Heat Transfer Medium - Wittmann Tempro basic C 90 Translation Of Original Operating Manual

10.2 Heat Transfer Medium

The use of water as heat transfer medium is preferred. The filling of the tool
circuits takes place automatically via the cooling water entry.
CAUTION To keep the soiling and calcification as little as possible, a suitable
anticorrosive agent and hardness stabilizer should be used in the central water
treatment.
Requirements and Care for the Water in Cooling Circuits and Temperature-
Control Units!
There are various requirements for the cooling water (system water) regarding
water quality depending on the type of the facility to be cooled or temperature-
controlled. In order to protect the system components from corrosion and deposits
Wittmann Kunststoffgeräte GmbH recommends always treating the water
with a suitable agent, for example with ST-DOS H-390 (corrosion protection with
non-ferrous metal protection and hardness stabilisers).
We recommend carrying out regular water analyses in order to monitor the water
quality. Furthermore the following water quality* must be upheld depending on the
installed materials, the temperatures and the procedures.
Requirements in principle:
Water Parameter
pH-value
Conductivity (25°C)
Total hardness
Carbonate hardness
Carbonate hardness with hardness
stabilisation
-
Chloride Cl
Sulphate SO
4
Ammonium NH
Iron Fe
Manganese Mn
The following are also required:
1. Systems with stainless steel (particularly for V2A steel, 1.4301)
Chloride Cl
Chloride Cl
Chloride Cl
Chloride Cl
Tempro basic C 90 & Tempro primus C 90
2-
+
4
-
Temperature < 50 °C
-
Temperature
-
Temperature > 90 °C
-
Temperature > 180 °C
Target Value Unit
System Water
7.5 –9.0
< 150
< 15
< 4
< 15
< 100
< 150
< 1
< 0,2
< 0,1
max. 100 mg/l
50 to 90 °C max. 50 mg/l
max. 30 mg/l
max.
BASIC & PRIMUS C90 V 3.0 english / 10.04.2012
-
mS/m
°d
°d
°d
mg/l
mg/l
mg/l
*free of solid
mg/l
matter
mg/l
5 mg/l
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