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MS2N
Features and functions
Bosch Rexroth AG
R911347581, Edition 05
The occurring electro-chemical processes within
the cooling system must be minimized via selec-
tion of the materials. Do not combine different
materials, like copper, brass, iron, zinc and halo-
genated plastics (e.g. tubes and sealing made of
PVC).
Fix coolant ducts and check for their tightness in
regular intervals.
Potential equalization
Connect all components within the cooling
system (e.g. motor, heat exchanger, pipe system,
pump, pressure compensation container, etc.)
with a potential equalization. Do the potential
equalization with a copper bus bar or copper wire
with an appropriate conductor cross-section.
Coolant ducts must not contact live parts. Please
observe sufficient insulation according to the reg-
ulations valid for the place of installation.
Cleaning the coolant circuit
Inspect and clean (purge) the cooling system
at regular intervals as specified in the machine
and cooling system manufacturer's maintenance
schedule.
Note that the utilization of unsuitable cleaning
agents may cause irreversible damage to the
motor cooling system. This type of damage does
not lie within the responsibility of Bosch Rexroth.
NOTICE
Damage to the motor cooling system due to
unsuitable cleaning agents!
−
The only liquids or materials allowed to
be used for cleaning and motor cooling
are those which do not corrode the motor
cooling system or do not react aggressively
to the materials used in Bosch Rexroth
motors.
−
Observe the instructions of the manufac-
turers of the cleaning agent and the cooling
system.
Coolants
The coolant must comply with certain criteria
and treated accordingly
). To
ensure corrosion protection and chemical stabili-
zation admix an additive to the cooling water. The
selected coolant additives (biocides, inhibitors)
must comply with the materials in the cooling
system (e.g. copper, brass, stainless steel, etc.)
and minimize the micro-biological growth. Pay
attention to environmentally friendly materials.
A cooling with floating water from the supply
network is not allowed. Floating water can cause
sediments (chalk) or corrosion within the cooling
system.
Remark:
In the case of other used coolants
than water (e.g. oil), a performance reduction
of the motor can be necessary to dissipate the
created power loss.
NOTICE
Motor damage due to missing or incompatible
coolant water!
−
For this reason, water cooled motors may
only be operated as long as coolant supply
is ensured.
−
Do not use any cooling lubricants or cut-
ting materials from machining processes for
cooling.
−
Using aggressive coolant additives or addi-
tives can lead to irreparable motor damage.
Remark:
The dimensioning of the cooling
system is in the responsibility of the machine
manufacturer.
Adjust the required coolant, especially the mate-
rial compatibility must be specified with the man-
ufacturer of the cooling unit and the manufac-
turer of the coolant additives. The basic minimum
requirements for the coolant are displayed in the
following.
Cooling water quality for motors with internal cooling circuit
made of stainless steel.
pH value (bei 20 °C)
6 ... 9
Total hardness
1.2 ... 2.5 mmol/l