NORD Drivesystems B2050 - Manual (Page 29)

4. Commissioning
www.nord.com B2050-GB-0613 -29-
4.3 Operation with pressure circulation lubrication
Attention!
If pressure circulation lubrication is used, the operational viscosity of the gear oil on
start-up must not exceed 1800 cSt. For ISO-VG220 this corresponds to a maximum
temperature of 10℃ for mineral oil, and a temperature of at least 0℃ for synthetic oil.
Danger!
The drive unit may only be commissioned after the pump for the pressure circulation
lubrication has been connected and commissioned. Observe the operating instructions
for the pump.
For operation in explosion hazard atmospheres, only approved and labelled circulation
pumps may be used. The ATEX labelling must conform to the details of the system
and/or machine design.
During operation, the function of the lubricant circulation must be monitored and
ensured. The gear unit must be shut down immediately in case of failure of the
lubrication circulation.
All gear units equipped with lubricant circulation are provided with a pressure switch to monitor
the pump function. The connection of the pressure switch and the evaluation of the signal must
be carried out by the operator. The pressure switch must be connected so that operation is only
possible if the oil pump has built up pressure. During commissioning, a lower pressure is
permissible for a short time.
4.4 Pressure safeguard
The pressure safeguard is an electric switch, which monitors the lubrication pressure of gear
units with circulation lubrication or targeted lubrication. If the pre-set pressure is undershot, the
applied electric signal is interrupted by the pressure safeguard. Evaluate the signal accordingly.
Caution!
Connect the pressure safeguard so as to be fully functional before starting operation for the
first time. The pressure safeguard can only be used in combination with a monitoring system.
Note!
Evaluate the pressure safeguard after initially operating the pump, as pressure must be built
up.