Process Water / Fluids - Pfannenberg CCE Standard-Serie Betriebs- Und Wartungsanleitung

Voltage Limitations:
According to CEI EN 60204-1, Pfannenberg standard Chiller operation is guaranteed within these ranges:
•
Nominal voltage ±10 %
•
Nominal frequency ±1 % [Hz]
Please refer to the type label to see which are the operating nominal conditions of the unit.
For units with special voltages please refer to the type label.

6. Process Water / Fluids

PFANNENBERG chillers should be filled to the proper level with an inhibited glycol designed for Industrial chillers systems. Do
not use automotive antifreeze! The inhibitors used in automotive antifreeze can break down quickly and accelerate the
degradation of the coolant base (glycol); as well as promote corrosion in a system. Silicates used in automotive antifreeze coat
heat exchangers, resulting in reduced heat transfer. Also, silicates can gel causing fouling and plugging of a system.
The ratio of inhibited glycol to water should be adequate to prevent freezing at the lowest ambient temperature. Check the level
with all lines filled. The glycol mixture should be checked periodically (3 to 6 months) for proper concentrations. When
filling the system, always use a pre-mixed solution in the proper ratio to maintain freeze and corrosion protection. Distilled water
is recommended because many municipal water supplies contain large amounts of chlorine, which can react unfavorably with
glycol.
NOTE: If user's circuit is at least 500mm over the hydraulic connection of the chiller, the fluid in the piping may drain
back and overflow the chiller reservoir if the chiller is shut down. This can be prevented by using a check valve in the
supply line, and either a solenoid valve on the return line.
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 working temperature of the mixture (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
70040-120_01-_-(CCE_Op._Manual_EN-DE-IT-ES-FR-RU).docx
English
[V]
Nominal conditions
230 V / 1 ~ / 50 Hz
230 V / 1 ~ / 60 Hz
400V / 3~ / 50Hz
460V / 3~ / 60Hz
dilution
% Min [°C]
20
30
54
dilution
% Min [°C]
20
30
50
V min V max f min
[V] [V] [Hz]
207 253 49.5
207 253 59.4
360 440 49.5
414 506 59.4
Working range temperature
Max [°C]
+10 +101
0 +103
-25 +104
Working range temperature
Max [°C]
+10 +102
0 +103
-25 +108
f max
[Hz]
50.5
60.6
50.5
60.6
Freezing point
-8
-14
-38
Freezing point
-8
-15
-38
10