25
11
MAINTENANCE
Turn off water supplies to the pump and release pressure
by opening water outlets before attempting maintenance
11.1
Inlet Strainer
The inlet strainers may require periodical cleaning. The frequency of this operation
is dependent upon installation conditions. The strainer is located in the inlet
assembly of the pump casing and is removed as follows:
1.
Isolate pump electrically.
2.
Release all system pressure.
3.
Isolate hot and cold water supplies via the integral pump isolating valve
located in the flexible hoses and release hose nuts connected to the pump (see
Section 8 - Pump Connections).
4.
Remove M4 screws (2 off) from inlet assembly, lift brass inlet fitting (with ‘O’-
ring) and clamp away from pump casing (Figure 15).
5.
Remove strainer with long nose pliers noting location lug position upon
removal (Figure 15) and clean thoroughly.
6.
Refit strainer taking care to position lug in body inlet port location slot and re-
assemble pipework. Tighten M4 clamp screws to 1.5 Nm torque.
7.
After maintenance is completed refer to Section 10 – Commissioning for
instructions on re-starting pump.
Figure 15
Strainer
O Ring
Inlet
port
Inlet
fitting
