Danfoss EM-PMI375-T1100, User Manual

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The relubrication interval depends on the used rotation speed and bearing temperature, and is
presented in Figure below. The different curves represent different bearing temperatures. The
higher the temperature is and the higher the rotation speed is, the lower the relubrication interval
is.
Figure 40. Relubrication interval of the machine (BHS option) compared to rotation speed and bearing
temperature
For more information about the location of grease nipples and grease escape holes, see Chapter Connections and
interfaces.
Bearing relubrication:
1. Make sure that the machine has reached its operating temperature.
2. Remove the plugs from the grease escape holes.
3. Open the grease nipple plugs.
4. Use grease piston to enter speci c amount of grease into the grease nipple.
5. If possible, let the machine run approximately one hour to let the old grease exit. NOTE! It is
normal if no grease exits the electric machine. This is because the cavities inside the electric
machine can hold a lot of grease.
6. Install the plugs on the grease nipples and on the grease escape holes.
Cooling system maintenance
The electric machine cooling system requires certain regular maintenance activities.
The coolant liquid ow direction must be changed yearly. This is done by changing the order of
the coolant connections, or changing the coolant pump direction. The reason for changing the
coolant ow direction is to prevent possible dregs (sediment) accumulating to the cooling system.
The quality of the coolant must be checked yearly. The mixture of water and glycol as well as the
type of the glycol used must be as speci ed. See Chapter Recommended coolants .
EM-PMI375
8. Maintenance
60 | © Danfoss | Produced By: Danfoss Power Solutions | January 2019
| BC265856307805en-000105