Voltage Limitations; Process Water / Fluids - Pfannenberg Rack Serie Libro De Instrucciones

CAUTION:
of the auxiliary circuit located inside the e-box in the right way.
Unit CE: Factory setting 400/3/50, see picture 5
Unit UL: Factory setting 460/3/60, see picture 6

Voltage Limitations:

Pfannenberg standard Chiller operation is guaranteed within these ranges:
•
Nominal voltage ±10 %
•
Nominal frequency ±1 %
Please refer to the type label to see which are the operating nominal conditions of the unit.

8. 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.
In case units that can work with different voltages (400V or 460V), connect the transformer
Picture 5
Transformer set at 400V
Switch 50-60Hz Automatic
Nominal conditions
230 V / 1 ~ / 50 Hz
230 V / 1 ~ / 60 Hz
400V / 3~ / 50Hz
460V / 3~ / 60Hz
English
24 V AC Aux:
Picture 6
Transformer set at 460V
24 V DC Aux:
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
10
f max
[Hz]
50.5
60.6
50.5
60.6