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c)
Release system water pressure by opening a system outlet (tap).
d)
Isolate both the hot and cold outlet water supplies by closing the appropriate
isolating valves.
e)
Remove pressure vessel from the pump taking care to collect or absorb any
residual water using towels.
f)
Check air pre-charge at schrader valve (Fig. 2) using a tyre pressure gauge.
For details of each individual models pressure requirements and further details,
see pre-installation assembly section.
g)
Replenish air charge if required by injecting air into the vessel via the schrader
valve using a car or bicycle pump, see pre-installation assembly section.
h)
Re-assemble pressure vessel to pump hand tight to achieve a water tight
connection.
i)
Close all system taps, open hot and cold inlet and outlet isolating valves.
j)
After maintenance is completed refer to commissioning section for instructions on
re-starting pump.
6.
As water is heated scale deposits are released in areas of hard water (usually south
of a line between the Wash and Bristol Channel), scale can cause the mechanical
seal to stick if left without use for long periods. We recommend the pump is run for at
least 5 minutes every four weeks to “exercise” all working parts. Run on cool water.
See technical specification for note on water temperature. This particularly applies to
guest bathrooms used infrequently.
Cleaners, Disinfectants and Descalents
On installations where chemical disinfectants or descalents are periodically
used, the compatibility of the chemical solution regarding the pump must be
considered.
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 refer to Stuart
Turner Ltd.
Cont....
