Preliminary Operations - Bertolini GIARDINAGGIO Serie Manual De Uso Y Mantenimiento

3.13 Preliminary operations

WARNING!

Make sure that when the pump is operating, the oil level reaches the reference
mark, depending on the type of pump. Only use oil or semi-hydraulic oil SAE 30.

Make sure that the pressure accumulator has been correctly inflated by means of a
normal compressed air gun with pressure gauge, of the type used for checking the
inflation pressure of tyres. The pressure to which the accumulator is inflated will
depend on the pressure range at which the pump will function. The accumulator is
normally already preloaded to function at the maximum pressure allowed by the
pump. You are advised to comply with the values given in the following table if
different operating pressures are envisaged.
OPERATING PRESSURE
20 to 50
10 to 20
5 to 10
2 to 5
(1 bar/14.5 PSI)
 Make sure that the suction hose is not bent and that it is securely fixed to the
relative pipe fitting and to the filter. Always avoid throttles and prevent air from
being sucked in, as this could prevent the pump from functioning correctly.

When the suction side is connected to the water system or to the water head,
and with the vacuum connection during the starting operation, the lever of the
pressure adjusting valve must be in the by-pass position.

In installations with a cardan shaft, make sure that this is of the correct length,
that the type of cardan shaft and the turning radii are compatible with each other
and remember to periodically grease the sliding parts. This is because the cardan
shaft must be prevented from thrusting against the pump shaft.
ACCUMULATOR PRESSURE
ACCUMULATOR
VALVE
6 to 8
5 to 7
2 to 5
2
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