Replacement Of Power Head - Grundfos UPE 2000 FZ Series Montage- Und Betriebsanleitung

4. Replacement of power head

Dismantling
Warning
Please note that the pump may be hot for a while after being
switched off and that hot liquid may escape from the pump
during dismantling.
Warning
Never make any connections in the pump control box unless
the power supply has been switched off for at least 5 minutes.
Make sure that voltage supplies from other external systems
have been switched off as well.
Always use an antistatic service kit (Grundfos ESD,
protection set prod. no. 96884939) when dismantling and
Caution
assembling the terminal box as the electronics are sensitive
to static electricity. Connect the antistatic service kit to the
connection terminal of the protective earth lead (PE terminal).
1. Note the pump type of the faulty power head and find the corresponding
service nameplate delivered together with the new power head. Fit the
service nameplate on the new power head. See fig. 9.
2. Switch off the power supply to the pump, and make sure that it cannot be
accidentally switched on again during replacement.
3. Close the isolating valves on either side of the pump or empty pipe
system for water.
4. Remove the four screws securing the control box cover. Remove the
cover. See fig. 2.
5. Before disconnecting any leads, carefully note their position.
6. Disconnect all leads from the control box.
7. Unscrew the five screws securing the PCB to the control box bottom and
remove the PCB from the control box. See fig. 4.
8. Remove the two rubber plugs. See fig. 6.
9. Remove the two screws securing the terminal box to the power head.
See fig. 5.
8