Power Loss; Coolant Specification; General Coolant Requirements - Siemens SIMOTICS FD 1LH1 Operating Instructions & Installation Instructions
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Preparations for use
4.5 Coolant specification
4.4.5
Power loss
When dimensioning the cooling system, take into account the power losses as a function of the
flow rate for the rated data.
Machine type
1LH....-3A...-....
1MH....-3A...-....
1LH....-3B...-....
1MH....-3B...-....
1LH....-4A...-....
1MH....-4A...-....
1LH....-4B.1.-....
1MH....-4B.1.-....
1LH....-4B.3.-....
1MH....-4B.3.-....
1LH....-4B.5.-....
1MH....-4B.5.-....
1LH....-4B.7.-....
1MH....-4B.7.-....
Power losses as a function of the flow rate for the rated data.
4.5
Coolant specification
4.5.1
General coolant requirements
The coolant must fulfill the following requirements over the long term. The coolant is based on
filtered drinking/municipal water of the quality specified below.
De-ionized water
Specific conductivity
Evaporation residue
NOTICE
High percentage of chloride in drinking water
According to Directive 98/83/EC, drinking water may contain up to 250 mg/l of chloride. This
value is too high for the heat sinks, which may be destroyed if inhibitors are not added.
Use inhibitors if the drinking water has an excessively high chloride percentage.
To better explain the coolant recommendations in this document, some of the problems that
can be encountered if the recommendations are ignored are listed in the table below.
32
Flow rate ± 10 %
[l/min]
40
60
80
< 30 μS/cm
< 20 mg/l
Power loss
[kW]
28
42
56
SIMOTICS FD 1LH1
Operating Instructions 01/2019
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