7
7. Megging
Megging of the pump can be carried out as described below.
8. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
Caution
Megging of an installation incorporating a GRUNDFOS MAGNA pump is not allowed, as the
built-in electronics may be damaged. If megging of the pump is necessary, the pump should
be electrically separated from the installation.
Megging of pumps
1. Switch off the electricity supply.
2. Remove the wires from terminals L and N and the earth
conductor.
3. Short-circuit terminals L and N using a short wire (see B).
4. Remove the screw for electronics frame connection
(see A).
5. Test between terminals L/N and earth (see C).
Maximum test voltage: 1000 VAC/1500 VDC.
Caution: Never test between supply terminals (L and N).
Maximum permissible leakage current < 35 mA.
6. Fit the screw for electronics frame connection (see A).
7. Remove the short wire between terminals L and N
(see B).
8. Fit the supply wires to terminals L and N and the earth
conductor.
9. Switch on the electricity supply.
TM02 0238 0904
A
B
C
Subject to alterations.
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