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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 39)
Cooling water intake temperature
The maximum cooling water intake temperature is 25 °C.
NOTICE
Condensation for an excessively low cooling water intake temperature
If the temperature difference between cooling water and ambient temperature is greater than
5 K, this may result in condensation forming in the machine. This results in material damage.
● Make sure that the condensation can drain away freely.
● Adopt appropriate measures to achieve the required intake temperature of the cooling
● Alternatively, dry the ambient air.
SIMOTICS FD 1MH1
Operating Instructions 08/2017
Substances that can destroy the cooling system
water.
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.
Preparations for use
4.5 Coolant specification
37
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