MW TOOLS POAD12 Mode D'emploi page 7

POAD12 - POAD24 - NLFREN - v1.0 - 20042017
EN
35/24 AMP
Main breaker
12V/24V DC battery
5 Operation
To start and prime the pump, the discharge line must be opened to allow trapped air to escape, thus avoiding the potential of
airlock. For demand models, the pressure switch will shut off the pump automatically when discharge valve is closed and the
pressure switch will restart the pump when a valve is opened and the discharge line pressure drops to the ON set point of the
pressure switch. For bypass models, apply power to the pump and open the discharge valve to expel air in the line.
5.1 Demand operation (continuous duty)
Pump models fitted with a pressure switch are known as demand pumps. The pressure switch is preset to shut off the pump
motor automatically when a specific pressure is reached, such as in closed discharge conditions. The pressure switch turns
the pumps motor on automatically as the pressure drops, such as when the discharge valve is opened. Demand operation is
considered an "continuous duty" application. The maximum continuous duty cycle is that which will cause the motor to reach its
maximum thermal limits, due to its good self ventilation. Once the maximum thermal limit is reached, the motor must be allowed
to settle to a lower (ideally ambient) temperature, before resuming operation. Running the pumps at or near the maximum
thermal limit for an extended period may cause pump failure. Demand pump models feature an integral pressure switch that
automatically turns the pumps off/on in response to open/closed discharge conditions.
5.2 Bypass operation (if equipped)
Models equipped with an external bypass system are designed to pump at high pressure while at low or high flow rates.
Models equipped with bypass only must be turned off/on manually, or by an independent control device. Models equipped
with a bypass only will continue to run until the power is manually turned off.
Bypass system pumps are recommended for continuous duty service due to its self-ventilated motor. And motor need maintain
due to each set brush life about 3000 hours. Operation at lower pressure and temperatures, however, will extend overall pump
service life.
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TOOLS