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6 MAINTENANCE
6.13 Inlet strainer: Incorporated in the strainer is a removable gauze filter which
may require periodic cleaning. The frequency of this operation is dependent
upon installation conditions.
The strainer is located in the inlet pipework to the pump (Fig. 13). The gauze
filter is removed as follows:-
a) Isolate pump electrically.
b) Release all system pressure.
c) Isolate water supply.
d) Remove screwed hexagonal plug from strainer body taking care to collect or
absorb any residual water (Fig. 13).
Fig. 13
e) Remove and clean stainless steel gauze filter.
f) Reassemble gauze and secure plug tightly.
g) Turn on water supplies, connect power supply and test.
6.14 Pressure vessel: The pressure vessel should be checked once every 6 months
to have its air charge checked or replenished, this should be carried out as
follows:-
a) Isolate pump electrically.
b) Isolate the water supply by closing the appropriate isolating valves.
c) Release system water pressure by opening a system outlet on the system.
d) Remove pressure vessel from the pump taking care to collect or absorb any
residual water using towels.
e) Check air charge at Schrader valve (Fig. 14) using a tyre pressure gauge.
f) Replenish air charge if required by injecting air into the vessel via the
Schrader valve using a car or bicycle pump (Fig. 14).
g) Reassemble pressure vessel to pump hand tight to achieve a water tight
connection. Ensure sealing 'O'-ring is in place.
h) Close all system outlets, open inlet and outlet isolating valves.
i)
After maintenance is completed refer to Section 5 - Commissioning for
instructions on re-starting pump.
6.11 Disconnect electrical supply before working on the pump.
6.12 Turn off water supplies to the pump and release pressure by
opening water outlets before attempting maintenance.
Strainer
Gauze
- 16 -
Gasket
Hex plug
Cont ...
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