En
gl
is
h (
G
B)
18
9.1.2 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.
Fig. 20
SCALA2 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. 20 (5).
6. Remove the drain plug and drain the pump. See
fig. 20 (8).
7. Unscrew the union nut holding the inlet
connection. See fig. 20 (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. 20 (5). 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. 21
Outlet and inlet non-return valves
9.2 Customer service information
For further information on service parts, see
Grundfos Product Center on
www.product-selection.grundfos.com.
9.3 Service kits
For further information on service kits, see Grundfos
Product Center on www.grundfos.com.
TM
06
38
18
10
15
1
5
6
7
8
2
3
4
9
TM
06
43
31
19
15
Outlet non-return
valve
Inlet non-return
valve
