Cooling; Fan; Cooling Coil - Siemens REDUREX Assembly And Operating Instructions Manual

5.7

Cooling

Depending on requirements, the gear unit is fitted with a cooling coil, an added­on oil­supply system with
water oil­cooler or a separately provided oil­supply system. In the case of a separate oil­supply system,
the specific instructions for this oil­supply system must be observed.
5.7.1

Fan

The fan is mounted on the high­speed shaft of the gear unit and is protected from accidental contact by
an air guide cover. The fan draws in air through the safety grid in the air guide cover and blows it over the
gear­unit housing. It thereby dissipates a certain amount of heat from the housing.
For gear units fitted with a fan, sufficient space must be allowed for air intake when
mounting the safety guards for the coupling or other components.
It must be ensured that the air guide cover is correctly fastened. The air guide cover
must be protected against damage from outside. The fan must not come into contact
with the air guide cover.
The cooling effect is considerably reduced if the fan or the gear housing are dirty
(see section 10, "Maintenance and repair").
5.7.2

Cooling coil

The gear unit can be fitted with a cooling coil in the oil sump. Cooling water is supplied by way of a water
connection. The operator must provide this connection. Either fresh water, sea water or brackish water can
be used for cooling purposes.
When water is flowing through the cooling coil, a certain amount of heat is transferred from the oil to the
water and thereby removed from the system.
The water can flow through the gear unit in either direction. The pressure of the cooling
water must not exceed 8 bar.
If the gear unit is being withdrawn from service for a longer period and if there is
a danger of freezing, the cooling water must be drained off. Remove any remaining
water with compressed air.
The ends of the cooling coil must never be twisted because this could destroy the
cooling coil.
The reducing bolt must not be tightened or removed because this may result in
damage to the cooling coil.
Be especially careful when blowing with compressed air.
Wear protective glasses!
Avoid too high pressure on the cooling­water entry. For this a cooling­water flow control must
be used (e.g. a pressure reducer or a suitable valve).
BA 5200 EN 08/2010
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