4.4.3
Components and materials of the cooling circuit
The following table lists a wide variety of materials and components which can occur in a
cooling circuit or which are prohibited.
Table 4-1
Materials and components of a cooling circuit
Material
Component
Remark
Zinc
Pipes, valves and fit‐
tings
Do not use any components manufactured out of zinc.
Brass
Pipes, valves and fit‐
tings
Can be used in closed cooling circuits with inhibitor.
Copper
Pipes, valves and fit‐
tings
Can only be used in closed cooling circuits with inhibitor. Locate an
isolating element, e.g. connecting pipe of the devices, between the
heat sink and copper component.
Steel (e.g. S235JR)
Cable
Can be used in closed cooling circuits with inhibitors or anti-freeze.
Check for the formation of oxide; to do this, use a sight glass, for
example.
Cast steel, cast iron
Pipes, motors
Can be used in closed cooling circuits. Use sieves and return flush
filter; for stainless steel cooling systems, use a Fe separator.
High-alloy steel, Group 1
(V2A)
Pipes, valves and fit‐
tings
Can be used for drinking or municipal water with a chloride content
< 250 ppm.
High-alloy steel, Group 2
(V4A)
Pipes, valves and fit‐
tings
Can be used for drinking or municipal water with a chloride content
< 500 ppm.
Installation employing differ‐
ent materials ("mixed instal‐
lation")
Pipes, valves and fit‐
tings
Do not use a mixed installation.
PVC
Pipes, valves and fit‐
tings, hoses
Do not use any components manufactured out of PVC.
Hoses
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
9
Ω, e.g. "Semperflex FKD" supplied from Semperit or "DEMIT‐
TEL" from PE/EPD, supplied from the Telle company.
Gaskets
Pipes, valves and fit‐
tings
Use seals manufactured from fluorinated rubber in accordance with
DIN ISO 1629, AFM34, EPDM (recommended).
Hose connections
Transition from pipe to
hose
Fasten the hose connections with bracket clamps in accordance
with EN 14420.
4.4.4
Potential equalization on the cooling circuit components
● Connect an equipotential bonding conductor to all of the components in the cooling system
(motor, converter, piping system, etc.).
● Implement the equipotential bonding using a copper rail or finely stranded copper cable with
the appropriate cable cross-sections. In this way, you suppress electrochemical processes.
Preparations for use
4.4 Configuration of the cooling circuit and coolant supply
SIMOTICS FD 1LH1
Operating Instructions 01/2019
31
Summary of Contents for SIMOTICS FD 1LH1
Page 2: ...23 01 2019 19 26 V11 01 ...
Page 28: ...Description SIMOTICS FD 1LH1 28 Operating Instructions 01 2019 ...
Page 122: ...Operation 8 10 faults SIMOTICS FD 1LH1 122 Operating Instructions 01 2019 ...
Page 140: ...Maintenance 9 2 Corrective Maintenance SIMOTICS FD 1LH1 140 Operating Instructions 01 2019 ...
Page 162: ...Disposal 11 5 Disposal of components SIMOTICS FD 1LH1 162 Operating Instructions 01 2019 ...
Page 164: ...Service and Support SIMOTICS FD 1LH1 164 Operating Instructions 01 2019 ...
Page 168: ...Quality documents SIMOTICS FD 1LH1 168 Operating Instructions 01 2019 ...
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