Siemens SIMOTICS M-1FE2, Configuration Manual

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Motor components and options
4.1 Motor components
SIMOTICS M-1FE2 built-in motors
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Configuration Manual, 05/2021, A5E50494252B AB
4.1.3.6 Coolant
Coolant specification
As coolant, use only water that complies with the "water specification for coolant".
Note
If possible, use deionized water with reduced conductivity (5 ... 10 μ S/cm) as the coolant.
Table 4- 9 Coolant water specifications
Quality of the coolant water for motors with a cooling
jacket manufactured out of steel or aluminum
Chloride ions < 40 ppm, can be achieved by adding deionized water.
Sulfate ions < 50 ppm
Nitrate ions < 50 ppm
pH value For steel: 6 ... 9; for aluminum: 6 ... 8
Electrical conductivity < 500 μ S/cm
Total hardness < 170 ppm
Dissolved solids < 340 ppm
Size of entrained particles < 100 μ m
Corrosion protection 0.2 to 0.25% inhibitor, Nalco TRAC100 (previously 0GE056)
Anti-freeze protection When required, 20 - 30% Tyfocor
The values specified for the water as a coolant are the requirements for a closed cooling
circuit. Not all of the specified concentrations will occur in the water at the same time.
When necessary, contact your water utility for the values.
Note
Inhibitor is not required if a Tyfocor concentration > 20% is ensured.
Derating is not required for antifreeze protection components < 30%.
Measures for frost danger
If there is danger of frost, adopt frost protective measures for complete or preassembled
motor spindle units.
•
Replenish antifreeze for operation (see Table "Coolant water specifications").
Note
• Avoid mixing different antifreeze products.
• Use and dose the antifreeze according to the manufacturer’s specifications.