Pfannenberg CCE Standart Serie Traduction De La Notice Originale page 11

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:
Protect 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 chloride is getting higher and the system
water will cause corrosion on the installed components.
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.
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: 7-9
Hardness:<5°dH
Conduction:<50µS/cm
Chlorine:<20 mg/l
Water quality B (Water treatment is recommended):
Fresh water from tap, free of contamination
Ph-level: 7-8, 5
Hardness:<10°dH
Conduction:<300µS/cm
Chlorine:<50 mg/l
Water quality C (Water treatment manditory):
Fresh water from tap, free of contamination
Ph-level: 7-8,5
Hardness:<20°dH
Conduction:<500µS/cm
Chlorine:<100 mg/l
70040-170_01-A(CCE_Op._Manual_EN-DE-IT-ES-FR-RU).docx
English
Ethylene glycol (Pfannenberg Protect PP...E) and Propylene glycol (Pfannenberg
If this is to become a problem, treat the water with passivators and/or
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