NORD Drivesystems B1050 - Manual (Page 20)

4. Commissioning
www.nord.com B1050-GB-0213 -21-
4. Commissioning
4.1 Checking the oil level
The oil level must be checked prior to commissioning. See Section 5.2.
4.2 Lubricant cooling with internal water cooler
Caution!
The drive may only be commissioned after the cooling coil has been connected to the cooling
circuit, and the cooling circuit has been put into operation.
The coolant must have a similar thermal capacity as water (specific thermal capacity at 20°C
c=4.18 kJ/kgK). Industrial water without any air bubbles or sediments is recommended as a
coolant. The water hardness must be between 1° dH and 15° dH, and the pH value must be
between pH 7.4 and pH 9.5. No aggressive liquids should be added to the coolant!
The coolant pressure must not exceed 8 bar. The required quantity of coolant is 10
litres/minute, and the coolant inlet temperature should not exceed 40°C; we recommend
10°C.
We also recommend fitting a pressure reducer at the coolant inlet to avoid any damage due to
excessive pressure.
If there is a danger of frost the operator should add a suitable anti-freeze solution to the cooling
water.
The temperature of the cooling water and the cooling water flow rate must be supervised
and ensured by the operator.
Note!
With a thermostat in the cooling water inlet, the volume of cooling water can be adjusted to
the actual requirements.
4.3 Lubricant cooling with external oil/water cooler (cooling system)
Attention!
The operating instructions for the cooling system must be observed.
The oil / water cooler consists of at least a motor pump, a filter and a flat plate heat exchanger. In
addition, a pressure switch is usual in order to monitor the pump and therefore the lubrication.
Caution!
The drive unit may only be put into operation after the cooling coil has been connected and
put into operation.