nord B 1050, Operating And Assembly Instructions Manual

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Industrial gear units – Operating and Assembly Instructions
56 B 1050 en-4419
4.3 Lubricant circulation (Option: LC, LCX)
NOTICE!
Gear unit damage due to overheating
• The drive unit may only be commissioned after the pump and the pressure monitor for the
pressure circulation lubrication have been connected and commissioned.
• During operation, the function of the lubricant circulation must be ensured by means of a
monitoring system.
• The gear unit must be shut down immediately in case of failure of the lubrication circulation.
Gear units equipped with lubricant circulation are usually equipped with a pressure monitor to monitor
the pump function. The pressure monitor must be connected so that operation is only possible if the oil
pump has built up pressure. If the pre-set pressure is undershot, the applied electric signal is
interrupted by the pressure switch.
During start-up, the viscosity of the gear oil must not be higher than 1800 cSt. For ISO-VG220 this
corresponds to a temperature of at least 10 °C for mineral oil, and a temperature of at least 0 °C for
synthetic oil. The pressure monitor can only be evaluated after the pump has been put into operation,
as a pressure must first be built up. During commissioning, a lower pressure is permissible for a short
period. The pressure monitor is usually set to 0.5 bar.
4.4 Gear unit cooling with fan( Option: FAN)
WARNING
Risk of eye injury from suspended particles
• Use goggles when switching on the fan.
NOTICE!
Risk of gear unit overheating from insufficient air flow
• Check the contact guard for warping and damage. Repair any damage prior to commissioning.
• An adequate supply of air must be ensured by means of a minimum free space of 30° ahead of the air
intakes. The air inlet grille and the fan blades must be kept clean.
Fan operation increases the probability of dirt and dust deposits in the spaces between the cooling
webs of a ribbed gear unit housing. This will reduce the thermal dissipation performance of the
housing. As a consequence, the gear unit is no longer cooled sufficiently.
The main direction of rotation was specified in the planning phase and can be obtained from the
specific dimension sheet for the order.
The opposite direction of rotation is also permissible. However, in this case the fan does not provide
cooling so that the calculated thermal limit power of the gear unit cannot be complied with.