BA 5230 en 04/2011
5.10
Heating
At low temperatures it may be necessary to heat the gear oil before switching on the drive unit or even
during operation. In such cases the use of heating elements is possible. These heating elements convert
electrical energy into heat which is conducted to the surrounding oil. The heating elements are located in
protective tubes inside the housing, thus making it possible to replace them without draining off the oil.
Complete immersion of the heating elements in the oil bath must be ensured.
The heating elements can be controlled by a temperature monitor which emits a signal when minimum and
maximum temperatures are reached; the signal requires amplification.
For a detailed illustration of the gear unit and the position of the addon parts, please refer to the drawings
in the gearunit documentation.
Never switch on the heating elements, unless complete immersion of the heating
elementsin the oil bath is ensured. Fire hazard!
If heating elements are installed afterwards, the maximum heating capacity
(see table 8) on the outer surface of the heating element must not be exceeded.
Table 8:
Specific heating output P
Ho
as a function of the ambient temperature
P
Ho
(W/cm²)
Ambient temperature
°C
0.9
0.8
0.7
+10 to 0
0 to -25
-25 to -50
Operation and maintenance must be in accordance with the pertinent operating instructions.
For technical data, refer to the list of equipment.
5.11
Indication of oil level
The gear unit is fitted with an oillevel indicator (oillevel indicator or oil dipstick) for visual oillevel checking
at standstill. Checking of the oil level can be carried out by looking at the MIN and MAX marks of the oillevel
indicator or oil dipstick when the oil has cooled down.
A detailed view of the gear unit can be obtained from the drawings in the gearunit documentation.
5.12
Oiltemperature monitoring system
Depending on the order specification, the gear unit may be fitted with a Pt 100 resistance thermometer for
monitoring the oil temperature in the sump. In order to measure the temperatures or temperature
differences, the Pt 100 resistance thermometer should be connected to a suitable instrument provided by
the customer. The thermometer has a connection head (protection type IP 54) for the wiring. A twowire
circuit is provided by the manufacturer. However, the customer may fit his own three or fourwire circuit
if required.
For control information, refer to the list of equipment.
Observe the operating instructions relating to the device in all instances.
For a detailed illustration of the gear unit and the position of the addon parts, please refer to the drawings
in the gearunit documentation.
When operating and servicing the components, observe the operating instructions relating to
the components.
For technical data, refer to the data sheet and/or the list of equipment.
