Improper use can damage the gear unit. Follow the instructions given below in order to protect
the gear unit against overheating:
● When you install the protective device for the coupling or similar on gear units that are
equipped with a fan, make sure that you leave sufficient clearance for cooling air to be drawn
into the fan.
The required clearance is specified in the dimension drawing in the complete
documentation for the gear unit.
● Make sure that the air guide cover is correctly fastened.
● Protect the air guide cover against damage by external components.
● Make sure that there is no contact between the fan and the air guide cover.
● Note that the cooling effect can be significantly impaired if the fan is dirty or if the surface of
the housing is covered with dust or contaminants that act as an insulating layer.
Clean the fan and the gear unit. Observe the cleaning information in chapter Cleaning the
fan and gear unit (Page 93).
3.7.2 Cooling coil
Introduction
The gear unit can be equipped with a cooling coil in the oil sump. The cooling coil is connected
to a cooling water supply. The cooling water connection must be provided by the operator. The
cooling water can be fresh water, sea water or brackish water.
Principle of operation
Heat from the gear unit oil is transferred to the cooling water as it flows through the cooling coil.
Note
To prevent the formation of condensation, make sure that the cooling coil is fully immersed in
the oil.
Improper use can damage the cooling coil. Be sure to take the following precautions:
● Make sure that the cooling water pressure does not exceed 8 bar.
The direction of water flow through the gear unit is optional.
● Make sure that the ends of the cooling coil are not twisted and that the reducer screws are
not removed.
● If there is a risk of freezing temperatures, drain the cooling water out of the coil and blow the
coil out with compressed air to remove any water residue.
● Use a suitable cooling water flow regulator (e.g. a pressure reducing valve or an appropriate
isolation valve) in order to prevent excessive water pressure at the cooling water inlet.
Description
3.7 Cooling
REDUREX Gear unit 5200en
Operating Instructions 03/2019 29
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