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Stuart Turner Monsoon U1.5 bar Twin User Manual

Page 17

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6.14

Pressure vessel: 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).

d) Check air charge at Schrader valve (Fig. 15) using a tyre pressure gauge.

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 Section 5 - Commissioning for

instructions on re-starting pump.

6.15

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.

6.16

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 Pump Assist helpline.

Model

Vessel Pressure

kPa

bar

psi

U1.5 bar Twin

90

0.9

13.0

U2.0 bar Twin

U3.0 bar Twin

U4.0 bar Twin

130

1.3

18.5

U4.5 bar Twin

Fig. 15

Pressure vessel

Schrader valve