Grundfos LS Series, Installation And Operating Instructions Manual

Page: 23 / 36

English (GB)
23
Motor bearings
Lubricate the motor bearings in accordance with the
indications on the motor nameplate.
Grease specifications: See
Ball bearing grease
below.
Ball bearing grease
1)
Grundfos recommends Shell Gadus S2 V2202 or
SKF LGHP 2 grease for relubrication.
Grid coupling
A grid coupling must be regreased at intervals.
Normally, the interval is one year, but it can be
shorter if the environment is aggressive or the
operating conditions are harsh. Use the same grease
for the coupling as for the ball bearings. See
Ball
bearing grease .
Proceed like this:
1. Remove the coupling guards.
2. Remove the two lubricating plugs.
3. Pump grease into one of the lubricating holes to
push the old grease out of the opposite hole.
4. Keep pumping until the fresh grease comes out.
5. Refit and fasten the two plugs.
6. Mount the coupling guards again.
7. Taking the product out of operation
The following shutdown procedures apply to most
normal shutdowns. If the pump is to be inoperative
for a long time, follow the storage procedures in
section
7.2 Long-term shutdown .
1. Always close the outlet or throttle valve before
stopping the pump. Close the valve slowly to
prevent hydraulic shock, but make sure that the
pump does not run against a closed valve for
more than a few seconds.
2. Switch off the power supply to the motor.
7.1 Short-term shutdown
1. For overnight or temporary shutdown periods
under non-freezing conditions, the pump may
remain filled with liquid. Make sure the pump is
fully primed before restarting.
2. For short or frequent shutdown periods at
temperatures below 0 °C, keep the liquid moving
within the pump casing and insulate or heat the
pump exterior to prevent freezing.
Manufacturer Lubricant
Shell Gadus S2 V2202
1)
SKF LGHP 2
1)
Exxon Polyrex
Chevron
SRI grease NLGI 2
Black pearl NLGI 2
Philips Polytac
Texaco Polystar RB