Use Of The Pressure Adjusting Valve - Bertolini GIARDINAGGIO Serie Manual De Uso Y Mantenimiento

3.12 Use of the pressure adjusting valve

WARNING!
Carefully comply with the following instructions, otherwise the pump warranty will
become void.
1.
Always start with the pressure at 0 bar, never with the pump in pressure. This operation
is of fundamental importance. If operation starts with the pump in pressure, the internal
components would be stressed immediately without the lubricant having had the
chance to circulate.
2. Turn the lever on the control unit in the anti-clockwise direction to the by-pass position
(see "HOW TO START THE PUMP" paragraph).
3.
Turn the adjusting knob on the valve in the anti-clockwise direction so as to lower the
pressure to 0 bar. This is highly recommended during the initial step;
4. Only start the pump when the valve is in the by-pass position, then allow it to operate
for at least two minutes or until the air has been completely bled from the hydraulic
circuit.
5. Turn the lever in the clockwise direction to the "Press" position with the spray gun or
spraying boom closed, and turn the knob clockwise until the required pressure has
been reached.
6. Turn on the spray gun or spraying boom and start to spray.
WARNING!
During the first step, you are strongly advised to start the pump with the regulating
valve knob turned to 0 pressure and with the lever in the by-pass position.
Maintain this configuration for a couple of minutes so as to lubricate the internal
components of the pump and allow the diaphragms to set in position before the
pressure is increased.
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