Orion RKS250F-S Operation Manual page 29

3. Refer to the following chart in order to avert future trouble.
Condition of working
water
The working water has
chloride ion or other
corrosive components
When using a concrete
water tank
When using additives in the
working water such as
antifreeze or other viscous
additives
Water Quality Management
Description of trouble
The presence of chloride ion or other corrosive
components can lead to the corrosion of stainless
steel in areas where water passes, and can also
lead to water and gas leaks.
Even if the concentration of corrosive components
is within water quality standards, rust and other
floating matter can form and stick to surfaces or
scaling can form and separate resulting in
progressive oxygen concentration cell corrosion.
Elution from concrete tanks can lead to a rise in pH
in addition to easy separation of scaling (calcium
carbonate, etc.) resulting in clogging of the
evaporator. Also water leakage can occur due to
corrosion from flaked scaling.
Pump capacity (head) will be reduced.
ORION's
designed
substances such as chloride ion, and avoid
problems like the progression of scaling as
well as other problems related to water
quality. Water quality management should
be carried out to ensure that working water
is within the prescribed water quality
standards.
Install a strainer (20〜40 mesh) that can trap
and prevent iron rust and other foreign
matter from entering the product.
Beware of a rise in pH, and if the water
quality standard level is exceeded, change
the water. If using a new concrete water
tank, repeatedly change the water in the
tank before using in order to reduce the
quantity of components leeching from the
new concrete.
Use a low concentration of industrial-use
ethylene glycol water solution of 10% or
less. Antifreeze does not evaporate so
periodically replace lost water in order to
prevent increasing concentrations.
26
Procedures to take
water quality standards
to help control corrosive
are