Stuart Turner Techflo QT 50TNH - Manual (Page 13)

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6.13 No other routine maintenance is required.
6.14 Should ever the need arise for the vessel to have its air charge checked or
replenished, it should be carried out as follows: -
a) Isolate pump electrically.
b) Isolate hot and cold water supplies via the integral pump isolating valve
located in the flexible hoses (see Section 3 - Pump Connections).
c) Release system water pressure by opening a system outlet (tap).
6 MAINTENANCE
6.11 Turn off water supplies to the pump and release pressure by
opening water outlets before attempting maintenance.
6.12 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 (Fig. 10) and is
removed as follows:-
a) Isolate pump electrically.
b) Release all system pressure.
c) Isolate hot and cold water supplies via the integral pump isolating valve
located in the flexible hoses and release hoses by holding the collets
connected to the pump on the inlet side (see Section 3 - Pump Connections).
d) The strainer is now visible and can gently be prised out of the inlet
connection. Clean thoroughly.
e) Refit strainer.
f) Re-connect flexible hoses (see Section 3 - Pump Connections).
g) After maintenance is completed refer to Section 5 - Commissioning for
instructions on re-starting pump.
Strainer
Pump inlet
Fig. 10