Stuart Turner Monsoon U1.5 bar Twin Installation Instructions Manual page 17

Schrader valve
e) Replenish air charge if required by injecting air into the vessel via the Schrader
valve using a car or bicycle pump, ensuring a system outlet valve (tap) remains
open during this procedure to allow the vessel to exhaust any excess water.
f) Close all system taps, open hot and cold inlet pump isolating valves, turn on
electrical power.
g) 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, please contact
our Pump Assist helpline.
Pressure vessel
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Fig. 16
Cont....