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Cont ...
7 MAINTENANCE
7.11 Turn off water supplies to the booster set and release pressure
by opening water outlets before attempting maintenance.
7.12
Pressure vessel:
The pressure vessel fitted to this booster set does not require any maintenance
during the life of the product.
If the system set pressure has been adjusted, the pressure vessel air charge
pressure will need to be adjusted as detailed below.
a) Isolate pumps electrically.
b) Isolate the pressure vessel from the system by turning the valve at the base
of the vessel (press button at the base of the valve handle to unlock) (Fig. 4).
c) Release system water pressure from the vessel by opening the drain valve
in the fitting at the base of the vessel (Fig. 4).
Warning: A considerable
volume of water will be released as the vessel discharges.
d) With the drain valve open, unscrew the black plastic cover to reveal the
Schrader valve. Check air charge at Schrader valve (Fig. 12) using a tyre
pressure gauge.
e) Replenish air charge by injecting air into the vessel via the Schrader valve
using a car or bicycle pump (Fig. 12). The vessel charge pressure
must
be 2/3 of the system set pressure, i.e. with a system set pressure of 4.2 bar,
the vessel charge pressure must be set to 2.8 bar.
Do not
exceed a vessel
charge pressure of 4 bar.
f) Replace the black plastic cover to the Schrader valve to ensure a leak tight
seal.
g) Close the drain valve.
h) Open the isolating valve at the base of the vessel.
i) Turn on the electrical suppy at the isolator switch in the connection box.
j) To restart see Section 6.16.
Damage may occur to the vessel if the incorrect charge pressure is
used.
Fig. 12
Schrader valve
(under cap)
Cap
Pressure vessel
