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7.2 Operating Temperature Range Limits
OPTI TEMP systems are designed to operate at fluid temperatures within a certain specified
temperature range. All systems are not designed to operate over the same range. It is
important that you do not operate the system outside of this intended range. Please refer to
the specifications in section 5.2 Specifications and Available Options for details on the
operating temperature limits.
CAUTION: Do not operate units outside recommended temperature range. System damage
and/or personal injury may result.
7.3 Fluid Selection, Water Quality and Corrosion Protection
Generally, OPTI TEMP recommends the use of distilled or de-ionized water instead of tap
water because tap water often has high level of total ionized solids which can accelerate
corrosion. These contaminants function as electrolytes which increase the potential for
galvanic corrosion. Tap water in the US averages 175 ppm sodium chloride (NaCl). The
recommended level for NaCl is between 0.5 to 5 ppm.
Normally OPTI TEMP recommends that systems, which require a fluid conductivity below 240
microsiemans/cm, utilize stainless steel construction. Systems where conductivities are
permitted to be above 240 microsiemans/cm may use a corrosion inhibitor such as
OPTISHIELD® to control corrosion and extend system life.
Note: Before using a corrosion inhibitor or Optishield, flush out the system and refill
with water/glycol to remove any possible construction debris that may be present in
the reservoir or fluid lines.
When using any corrosion inhibitor it is absolutely essential to install filtration on the
return side of the system. This will extend the life of your chiller. Corrosion inhibitors
loosen debris and if filtration is not installed, can cause damage to internal
components.
Visit www.optishield.net
for more information regarding OPTISHIELD®.
There are a wide variety of alternative heat transfer fluids are available for use in re-
circulating systems. However not all fluids are compatible with all materials of construction.
Contact OPTI TEMP to insure fluid compatibility before utilizing heat transfer fluids other than
water, distilled water, de-ionized water, Ethylene Glycol, or Propylene Glycol to insure
warranty terms are not violated.
7.4 Control Interface Layout
Please take a few minutes to familiarize yourself with the controls before starting your chiller
unit.
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