Stuart Turner Showermate U1.8 bar Twin - Manual (Page 18)

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6 MAINTENANCE
6.11 Turn off water supplies to the pump and release pressure by
opening water outlets before attempting maintenance.
6.12 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. 17) using a tyre pressure gauge.
Model Vessel Pressure
kPa bar psi
All Models 150 1.5 21.75
Fig. 17
Pressure vessel
Schrader valve
Single pump shown
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.