nord B 1050, Operating And Assembly Instructions Manual, Page: 58 / 112

Industrial gear units – Operating and Assembly Instructions
58 B 1050 en-4419
4.6 External cooling system (option: CS1-X, CS2-X)
NOTICE!
Gear unit overheating
• The drive unit may only be commissioned after the cooling system has been connected and
commissioned.
The system consists of at least a motor pump, a filter and a heat exchanger. In addition, a pressure
switch is usual in order to monitor the pump and therefore the cooling.
For oil / water coolers (option: CS1) the temperature of the cooling fluid and the cooling fluid flow rate
must be monitored and ensured by the operator. The maximum permissible cooling water inlet
temperature is defined during the planning phase and can be found in the order data.
If there is a danger of frost, the operator should add a suitable anti-freeze solution to the cooling water.
For oil / water coolers (option: CS2) an adequate air intake must be ensured. A free space of at least
30° must be provided for the air intake. The air inlet grille and the fan blades must be kept clean.
The permissible maximum ambient temperature for operating the cooling systems is 40 °C. A test by
NORD is required before commissioning if higher ambient temperatures prevail.
Information
Temperature regulation is provided by means of a resistance thermometer (PT100), which is installed
in the oil sump of the gear unit.
It is recommended that the cooling unit is only switched on above an oil temperature of 60°C and
switched off below an oil temperature of 45°C.