Starting Up The Product After Shutdown Or Standstill; Deblocking The Pump 10 Note; Controller Settings; Priming - Grundfos SCALA Installation And Operating Instructions Manual

9. Starting up the product after shutdown or
standstill
9.1 Deblocking the pump
Warning
Before starting any work on the product, make sure
that the power supply has been switched off and that
it cannot be accidentally switched on.
The end cover incorporates a plug which can be removed by
means of a suitable tool. This makes it possible to deblock the
pump shaft if it has seized up as a result of inactivity.
Fig. 17 Deblocking the pump

9.2 Controller settings

The pump will remember the controller settings even if it is turned
off.

9.3 Priming

If the pump has been drained, it must be filled with liquid before
startup. See section
4. Starting up the

10. Servicing the product

Warning
Before starting any work on the product, make sure
that the power supply has been switched off and that
it cannot be accidentally switched on.

10.1 Maintaining the product

10.1.1 Insect filter
The pump has an insect filter to prevent insects from nesting in
the pump.
The filter is placed on the bottom and can easily be removed and
cleaned with a stiff brush. See fig. 18.
Clean the insect filter once a year or as needed.
Fig. 18 Insect filter
10
product.
10.1.2 Inlet and outlet valves
The pump is maintenance-free, but we recommend that you
check and clean the inlet and outlet non-return valves once a
year or as needed.
1
2
3
4
9
Fig. 19 SCALA pump
To remove the inlet non-return valve, follow the steps below:
1. Turn off the power supply and disconnect the power plug.
2. Shut off the water source.
3. Open a tap to release the pressure in the pipe system.
4. Close the isolating valves and/or drain the pipes.
5. Gradually open and remove the priming plug. See fig.
6. Remove the drain plug and drain the pump. See fig.
7. Unscrew the union nut holding the inlet connection. See fig.
19 (7). Depending on the installation type, it may be
necessary to remove the pipes from both the inlet and outlet
connections.
8. Pull out the inlet connection.
9. Pull out the inlet non-return valve.
10. Clean the non-return valve with warm water and a soft brush.
11. Assemble the components in reverse order.
To remove the outlet non-return valve, follow the steps
below:
1. Turn off the power supply and disconnect the power plug.
2. Shut off the water source.
3. Open a tap to release the pressure in the pipe system.
4. Close the isolating valves and/or drain the pipes.
5. Gradually open and remove the priming plug. See fig.
The plug and non-return valve are one unit.
6. Clean the non-return valve with warm water and a soft brush.
7. Assemble the components in reverse order.
Fig. 20 Outlet and inlet non-return valves
5
6
7
8
19 (5).
19 (8).
19 (5).
Outlet non-return valve
Inlet non-return
valve