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Page: 38
VL Series Portable Chillers, 0.25 to 1.5 Tons UGH020/0301
C. USE OF PLAIN GLYCOL:
1. Even through they do lower the freeze point, plain glycols
are even more corrosive than water. The corrosion rate of
plain ethylene glycol on iron, for example, is more than 2.5
times faster than plain water. On steel, it is 4.5 times faster.
D. AUTOMOTIVE BASED ANTIFREEZE:
1. SHOULD NEVER BE USED!
Automotive antifreeze contains
silicate based inhibitors, which are compatible with
automotive components. In an industrial application, the
silicates will leach out and form a gel-like substance on the
heat transfer surfaces and reduce cooling efficiency of the
system. These silicates have shown to significantly reduce
the lifetime of pump seals.
E. MAINTENANCE RESPONSIBILITY:
1. A hygrometer should be used on a regular basis to
determine the mixture strength according to freeze point.
The freeze point temperature should be 25°F below the
lowest required setpoint (see charts on page 35 and 37).
Water will evaporate from the mixture, and if you continue
to add a premixed solution, eventually you will have too
much glycol. It is necessary to add water or glycol to
maintain proper freeze point temperature. The device
pictured is by far the most accurate and easy to use for
maintaining and checking for proper glycol levels.
Contact:
Misco Products:
1-800-358-1100
Model #7084VP