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

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6.13 No other routine maintenance is required.
6.14
Water scale: As water is heated scale deposits are released in areas of hard
water, scale can cause the mechanical seal to stick if left without use for long
periods. The pump must be run for at least 5 minutes every four weeks to
“exercise” all working parts. Run on cool water. See Section 7 - Technical
Specification for note on water temperature. This particularly applies to guest
bathrooms used infrequently.
6.15 Cleaners, Disinfectants and Descalents:
Acid based descalents and aggressive cleaning agents must not
come into contact with the pump. The pump must be removed from
the system prior to the use of these products. The system should be
flushed to remove all chemicals before the pump is re-connected.
If in any doubt as to the suitability of the chemical solutions, please
contact our helpline.
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. 9) 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 section for
instructions on re-starting pump.
Strainer
Pump inlet
Fig. 9