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Material
High-alloy steel, Group 2
(V4A)
Installation employing differ‐
ent materials ("mixed instal‐
lation")
PVC
Hoses
Gaskets
Hose connections
4.5.4
Potential equalization on the cooling circuit components
● Connect an equipotential bonding conductor to all of the components in the cooling system
● Implement the equipotential bonding using a copper rail or finely stranded copper cable with
4.6
Coolant specification
4.6.1
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.
SIMOTICS FD 1LN1
Operating Instructions 01/2019
Component
Pipes, valves and fit‐
tings
Pipes, valves and fit‐
tings
Pipes, valves and fit‐
tings, hoses
Pipes, valves and fit‐
tings
Transition from pipe to
hose
(motor, converter, piping system, etc.).
the appropriate cable cross-sections. In this way, you suppress electrochemical processes.
Remark
Can be used for drinking or municipal water with a chloride content
< 500 ppm.
Do not use a mixed installation.
Do not use any components manufactured out of PVC.
Reduce the use of hoses for connecting devices to a minimum. Do
not use any hoses as main connecting line for the complete system.
Recommendation: EPDM hoses with an electrical resistance
> 10
Ω, e.g. "Semperflex FKD" supplied from Semperit or "DEMIT‐
9
TEL" from PE/EPD, supplied from the Telle company.
Use seals manufactured from fluorinated rubber in accordance with
DIN ISO 1629, AFM34, EPDM (recommended).
Fasten the hose connections with bracket clamps in accordance
with EN 14420.
< 30 μS/cm
< 20 mg/l
Preparations for use
4.6 Coolant specification
33
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