Corrosion Protection - Pfannenberg EB Series Operating And Maintenance Instructions Manual

EN

5.5.2 Corrosion protection

PFANNENBERG recommends that Pfannenberg Protect Glycol is also used as a rust inhibitor.
The percentages of glycol into the mixture is related to the minimum ambient temperature of the chiller (that must
be in line with the minimum working set point of the unit, please see the technical data of the unit):
Propylene glycol
PP20P
PP30P
PP50P
Ethylene glycol
PP20E
PP30E
PP50E
CAUTION
Malfunction due to glycol concentration
The higher the concentration of glycol the lower the amount of heat rejection you will be able to get out of the
fluid.
CAUTION
Safety issues due to wrong glycol selection
Ethylene glycol (Pfannenberg Protect PP...E) and Propylene glycol (Pfannenberg Protect PP...P) differs for
viscosity and toxicity. Ethylene glycol is less viscous than Propylene one, so it provides 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.
Operating and Maintenance Instructions - Chiller - Series EB 210 - EB 440
dilution Working range temperature
% Min [°C]
20
30
50
dilution Working range temperature
% Min [°C]
20
30
50
Max [°C]
-7 +107
-12 +115
-30 +120
Max [°C]
-7 +107
-15 +115
-35 +120
Freezing point
-10
-15
-33
Freezing point
-10
-18
-38
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