Coolant - Siemens SIMOTICS T-1FW6 Operating Instructions Manual

3.4.3.2

Coolant

Providing the coolant
The customer must provide the coolant. The motors are designed for water cooling. The water
must comply with the requirements corresponding to the corrosion protection agent.
Note
Power derating when using oil as coolant
If you are using oil as coolant, then this can reduce the power loss dissipated by the cooler.
Appropriately reduce the motor power. Contact your local sales partner if you have any
questions.
Use water with anti-corrosion protection agent
If you use water with corrosion protection agent as coolant, you can avoid scaling and the
formation of algae and slime as well as corrosion.
This allows you to avoid the following damage and/or faults, for example:
• Worsening of the heat transfer
• Higher pressure losses due to restricted cross-sections
• Blockage of nozzles, valves, heat exchangers and cooling ducts
General requirements placed on the coolant
The coolant must be pre-cleaned or filtered in order to prevent the cooling circuit from becoming
blocked. Formation of ice is not permissible.
Note
The maximum permissible size of particles in the coolant is 100 μm.
Requirements placed on the water
Water, which is used as basis for the coolant must comply as a minimum with the following
requirements:
• Chloride concentration: c < 100 mg/l
• Sulfate concentration: c < 100 mg/l
• 6.5 ≤ pH value ≤ 9.5
Coordinate additional requirements with the manufacturer of the anti-corrosion agent.
1FW6 built-in torque motors
Operating Instructions, 09/2022, A5E52220812B AA
Description
3.4 Design
49