Table 4-2 Substances That Can Destroy The Cooling System - Siemens SIMOTICS FD 1LH1 Operating Instructions & Installation Instructions

Preparations for use
4.5 Coolant specification
Table 4-2
Coolant property or limit value vi‐
olation
Seawater
Water compliant with limit values Use inhibitors/antifreeze with the appropriate concentration. Locate
Entry of oxygen
Chloride
Sulfate
Solids (e.g. sand)
Total hardness
Conductivity
Biological contamination
Oil residue
Mechanical contamination
Inadequate equipotential bond‐
ing
See also
Inhibitors, anti-freeze, biocides (Page 31)
Risk of corrosion with inadequate coolant quality
The materials used in the heat exchanger are selected to match the cooling water quality for
which the heat exchanger was ordered. It cannot necessarily be used under different water
conditions.
NOTICE
Danger of corrosion
If the cooling water quality is unsuitable, the air-to-water heat exchanger may suffer corrosion
and fail.
● The chemical composition of the cooling water must comply with the configuration
● If the cooling water quality fails to satisfy the quality stated on the order, please contact
● Please note the recommended water quality in the operating instructions for the air-to-
30
Substances that can destroy the cooling system
specifications.
the Service Center.
water heat exchanger provided in the Appendix "Additional documents".
Countermeasure
Do not use seawater.
a pressure relief valve in the cooling circuit.
Use a closed cooling circuit. Locate a pressure relief valve in the
cooling circuit.
Use inhibitors/antifreeze with the appropriate concentration.
Use inhibitors/antifreeze with the appropriate concentration.
Dilute the coolant using de-ionized water until the limit value is
reached.
Flush the cooling circuit, without converter and motor. Use dirt fil‐
tering equipment, e.g. sieves, fine filters.
Use inhibitors/antifreeze with the appropriate concentration.
Connect an equipotential bonding conductor to all cooling circuit
components.
Use biocides. Use dirt filtering equipment, e.g. sieves, fine filters.
Use inhibitors/antifreeze with the appropriate concentration.
Flush the cooling circuit, without converter and motor.
Flush the cooling circuit, without converter and motor. Use dirt fil‐
tering equipment, e.g. sieves, fine filters.
Connect an equipotential bonding conductor to all cooling circuit
components.
SIMOTICS FD 1LH1
Operating Instructions 04/2016