Grundfos Circulator Pump UPS 50-60

8.3 Replacing the terminal box or capacitor

Before starting any work on this circulator, make sure electrical supply has been switched off and that it cannot be accidentally switched on.

1. Before replacing the terminal box and capacitor, make sure the power is OFF.

2. Remove the terminal box cover/lid by completely loosening the Phillips head screw in the center of the cover/lid.

3. Disconnect all wiring. Move the capacitor to allow access to the screws.

4. Remove the two T15 Torx head screws holding the terminal box in place.

5. Pull firmly and evenly on both sides of the terminal box to free it from the stator / pump head.

Before starting any work on this circulator, make sure electrical supply has been switched off and that it cannot be accidentally switched on.

1. Disconnect or TURN OFF the power supply.

2. Close any isolating valves on either side of the pump to avoid draining the system of liquid.

3. Remove the vent plug to relieve any system pressure retained in the pump. Exercise caution as the fluid may be scalding hot and under pressure. Only after the pressure has been relieved and the pump drained should you proceed with the next steps.

4. Disconnect the electrical leads from the terminal box.

5. Disconnect and remove the conduit from the terminal box.