Pfannenberg EB 2.0 Serie Cahier D'instructions page 13

CAUTION!
The higher the concentration of glycol the lower the amount of heat rejection you will be able
to get out of the fluid.
CAUTION!
PP...P) differs for viscosity and toxicity. Ethylene glycol is less viscous than Propylene one, so it provide a higher
efficiency in heat exchanging, and has better performance at low temperatures. For applications where is necessary
to ensure a non-toxic process, the propylene glycol based fluids are used because of their low toxicity if ingested; it
can be used for example where fluid can enter into accidental contact with beverages, or for industrial processes for
food and beverages processing. In some applications propylene glycol use is mandatory.
8.1 Waterquality
To keep the hydraulic circuit correct and trouble-free, it is necessary, to check the water quality and if necessary, carry out water
treatment. The standard circuit of a water chiller is a half open system, that means, part of the water steams/evaporates out during
operation. That means, that the concentration of
When using water to dilute the mixture, please consider the following:
•
It's recommended to use demineralized/deionized water (DM/DI) but not destilled water.
•
Do not allow mechanical contamination to get in the water. Use water filters if this could be a problem.
•
Water hardness should not be too high. (see below)
•
Watch for chemical contamination. If this is to become a problem, treat the water with passivators and/or inhibitors.
•
Do not allow biological, slime bacteria, and algae contamination. If this does happen, treat the water with biocides.
PFANNENBERG recommends that the properties of the water has to be checked in order to identify the quality
Water quality A (No water treatment necessary):
Fresh water from the tap, free of contamination
Ph-level:
Hardness:
Conduction:
Chlorine:
Water quality B (Water treatment is recommended):
Fresh water from tap, free of contamination
Ph-level:
Hardness:
Conduction:
Chlorine:
Water quality C (Water treatment manditory):
Fresh water from tap, free of contamination
Ph-level:
Hardness:
Conduction:
Chlorine:
70040-167_01-__(EB2.0_Op._Manual_EN-DE-IT-ES-FR-RU).docx
English
Ethylene glycol (Pfannenberg Protect PP...E) and Propylene glycol (Pfannenberg Protect
glycol
7-9
<5 °dH
<50 µS/cm
<20 mg/l
7-8,5
<10 °dH
<300 µS/cm
<50 mg/l
7-8,5
<20 °dH
<500 µS/cm
<100 mg/l
is getting higher.
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