Nakayama PRO NP2120, Руководство пользователя

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BEFORE OPERATION
We suggest to use the pump with pre filters and water purification equipment with inlet hoses to avoid prolonged maintenance on check valve and other
unnecessary damage.
OPERATION
• Plug in the power plug.
• Power on through turning ON/OFF. (If there are not turn on /off on some pumps, plug in to switch on the power supply, without affecting the function).
• Press the “Restart” key on the electronic pressure switch panel with your fingers and then the pump starts to work and pump water.
Electrical connections
• There are reliable ground connections for power supply which is connected with a leakage current protection switch with a maximum leakage current of
30mA.
• The pump should be switched on and off by touching the ON/OFF button.
• The pump comes with a thermal overload protector. In the case of overheating, the thermal overload protector will automatically turn off the pump. After
cooling, the water pump will restart automatically.
Preparation
• It is possible to place the pump on a level solid ground or fix the pump to the ground.
• Connect suction pipe.
• Install suction pipe. When necessary, please wrap teflon PTFE tape on the threads, to prevent air leak at joint.
Tips
• In order to shorten time of sucking water, it is recommended to fill the suction pipe with water before connecting to the pump.
• If transport substance contains sand in water, we strongly recommend installing pre filters so as to prevent access of foreign matter. The inlet pipe’s diameter
shall be at least 3/4”, and the pipe shall be a vacuum proof hose with reinforced threads or a pressure proof tube.
• The inlet pipe shall be provided with a water inlet valve to prevent the evacuation of the suction pipe after use.
• If the inlet pipe is not sealed, the air in the pipe will block the flow.
• The intake should be immersed enough in water to prevent the water pump from being stopped without water flow when the water level drops. The
installation of inlet pipe and pressure pipe shall avoid any mechanical twisting of the pump.
• The inlet pipe shall be connected to the pump under water. The pipeline shall not be higher than the pump. Otherwise, bubbles in the pipe will block the flow.
•
Connect the pressure pipe.
• The pressure pipe shall be able to bear the maximum pressure of the pump.
• 1/2” pressure hose can also be connected with the appropriate bolts, but it will reduce the output flow.
• In order to shorten the suction time, raise the pressure hose by about 1m.
• Any slight unsealing will lead to error, so it is recommended to install a pressure balance component (e.g. a pressure tank) at the pressure side, which
will reduce the number of starting the pump.
• In order to simplify emptying and decompression of system, it is recommended to install a stop switch between the pump and the pressure pipeline. When
emptying the pump, the stop switch could be switched off to prevent water from overflowing in the pressure pipeline.
• Insert power supply.
• All the shut-off devices (jet nozzles, valves, etc.) on the pressure pipe must be fully turned on during water injection and suction, so that the air in the pipe
can completely escape.
• Add water to water inlet of the pump head and fill it up until it overflows.
• Screw the valve cover over the water inlet and screw it tight.
After finishing work
• Turn off the pump by turning on / off. (if there is no turn on/off key on some pumps, then unplug the plug to turn off the pump directly, without affecting
the function).
• Unplug the plug from the socket.
• Check if there is pressure at the pressure side. In case of pressure, relieve pressure by turning on the faucet.
DESCRIPTION OF LED INDICATOR LIGHTS
No indicator lights up
It means that no electricity is in the line.
Indicator light ''Power on'' is on
It means that there is power in the line, but the pump is not working. Press the “Reset” button to turn on the pump. It is also possible that the pump is in a
constant pressure shutdown status. When the pressure at the pressure side line is lower than the starting pressure, the pump will automatically start pumping
water.
Indicator light ''Power on'' is on, the ''Pump on'' lights up
It means that the pump is pumping in normal operation.