Megging; Megging Of Upe Pumps; High-Voltage Test - Grundfos UPED 80-120 FZ Montageanleitung Und Bedienungsanleitung

Fault
8. Insufficient heat in some
places in the heating
system.
Note
The R100 can also be used for fault finding.

10. Megging

Megging of an installation incorporating an
UPE 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.
Twin head pumps: The master and slave pumps
must be megged separately.
Megging of the pump can be carried out as
described below.

10.1 Megging of UPE pumps

See also section 5.2 Wiring diagram.
1. Switch off the power supply.
2. Remove the conductors from terminals L, N and
earth (terminals 9, 10 and 11).
3. Short-circuit terminals L and N using a short wire.
4. Test between terminals L/N and earth.
Maximum test voltage: 1000 VAC or 1500 VDC.
Note: Never test between supply terminals
(L and N).
Maximum permissible leakage current:
< 20 mA.
5. Remove the short wire between terminals L and
N.
6. Fit the supply wires to terminals L and N and
the earth terminal.
7. Switch on the power supply.

10.2 High-voltage test

If it is necessary to high-voltage test the UPE pump,
the megging instructions must be followed.
See section 10. Megging.
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Cause
a) The flow is too low.
Remedy
Increase the head (setpoint) and/or
change over to constant pressure.