Installation And Operation Of Liquid-Cooled Devices; Water-Cooled Devices; Heat Sink And Operating Pressure; Materials In The Cooling Circuit - KEB COMBIVERT F6 Series Instructions For Use Manual

WATer-cOOLeD DeVIceS

5 Installation and Operation of Liquid-cooled Devices

5.1 Water-cooled devices
The use of water-cooled KEB COMBIVERT drive controllers is offered, because there
are process-caused coolants available with some applications. However, the following
instructions must be observed.

5.1.1 Heat sink and operating pressure

Design system
Aluminium heat sink with
stainless steel tubes
NOTICE

5.1.2 Materials in the cooling circuit

For the screw connections and also for the metallic articles in the cooling circuit which are in con-
tact with the coolant (electrolyte) a material is to be selected, which forms a small voltage differ-
ence to the heat sink in order to avoid contact corrosion and/or pitting corrosion (electro-chemical
voltage series, see the following table). The specific case of application must be checked by the
customer in tuning of the complete cooling circuit and must be classified according to the used
materials. With hoses and seals take care that halogen-free materials are used.
A liability for occuring damages by wrongly used materials and from this resulting corro-
sion cannot be taken over!
Material formed ion
Lithium Li+
Potassium K+
Calcium Ca2+
Sodium Na+
Magnesium Mg2+
Titan Ti2+
Aluminium Al3+
Manganese Mn2+
Zinc Zn2+
Material
Stainless steel 1.4404
Deformation of the heat sink!
► In order to avoid a deformation of the heat sink and the damages
thereby, the indicated maximum operating pressure may not be
exceeded briefly also by pressure peaks.
► The pressure equipment directive 2014/68/EU on pressure equip-
ment must be observed!
Standard poten- Material
tial
-3.04 V Nickel
-2.93 V Tin
-2.87 V Lead
-2.71 V Iron
-2.38 V Hydrogen
S t a i n l e s s
-1.75 V
steel
-1.67 V Copper
-1.05 V Carbon
-0.76 V Silver
max. operating pres-
sure
10 bar
formed ion
Ni2+
Sn2+
Pb3+
Fe3+
2H+
various
Cu2+
C2+
Ag+
continued on the next page
connection
=> „5.1.4 Connection
of the cooling system"
Standard poten-
tial
-0.25 V
-0.14 V
-0.13 V
-0.037 V
0.00 V
0.2...0.4 V
0.34 V
0.74 V
0.80 V
75