NAKAYAMA PRO NP2015 Peripheral Pump User Manual

: June 4, 2024
: NAKAYAMA PRO

Table of Contents

Technical Data
General Safety Rules
Overview of Pumps
Electrical Connections
Warnings
Installation Instructions
Maintenance and Replacement
Documents / Resources

NP2015
036029| NP2025
036036| NP2108
036043| NP2075
036050| NP2095
036067
---|---|---|---|---

Technical Data

Model	NP2015 (Α)	NP2025 (Α)	NP2018 ( Β)	NP2075 (C)	NP2095 (D)
Description	Volumetric Water Pump

| Volumetric Water Pump

| Automatic Self Priming Jet Pump| Centrifugal Pump| Horizontal Multistage Pump
Rated Power| 370 Watt| 750 Watt| 750 Watt| 1100 Watt| 950 Watt
Max. Head| 40 m| 70 m| 50 m| 20 m| 52 m
Max. Conveying Amount| 2100 L/h| 2700 L/h| 3000 L/h| 24000 L/h| 6600 L/h
Diameter of inlet &| 1”x 1”| 1”x 1”| 1’’x 1”| 2’’| 1,1/4’’x 1”

The manufacturer reserves the right to make minor changes to product design and technical specifications without prior notice unless these changes significantly affect the performance and safety of the products. The parts described/illustrated in the pages of the manual that you hold in your hands may also concern other models of the manufacturer’s product line with similar features and may not be included in the product you just acquired.
Please note that our equipment has not been designed for use in commercial, trade, or industrial applications. Our warranty will be voided if the machine is used in commercial, trade, or industrial businesses or for equivalent purposes.
To ensure the safety and reliability of the product and the warranty validity, all repair, inspection, repair, or replacement work, including maintenance and special adjustments, must only be carried out by technicians of the authorized service department of the manufacturer.

WARNING ! READ THROUGH THE INSTRUCTIONS FOR USE BEFORE STARTING UP THE EQUIPMENT. Failure to follow all instructions listed below may result in electric shock, fire, and /or serious personal injury. Persons, who are not familiar with the instructions, may not operate the equipment. Keep the instructions for use in safe custody. Children and youths are not permitted to operate the equipment.

General Safety Rules

In order to operate the equipment safely, the users shall carefully read and understand the instructions before the first application. The users shall obey all safety instructions. Otherwise, you and others may suffer from injury.
You shall preserve all application and safety instructions for further reference. The equipment shall be used when it has normal functions.
Please use the equipment according to the safety and technical requirements specified in the instructions.
The equipment shall be used within its performance range. Please don’t use the equipment which has an abnormal switch.
Please don’t use the equipment in the room which contains inflammable and combustible liquid or gas.
When the components which fail to be tested and recognized by manufacturers are improperly used, the equipment is likely to suffer from unforeseen damage.
Any application which deviates from the intended purpose as specified in the instructions will be considered an unauthorized application, as a result, the generated problems are independent of the manufacturers.
The equipment shall be connected to the socket which has correct installation and grounding.
Please ensure that the power supply can satisfy the connection regulations before the equipment connection.
Please don’t bend, extrude, pull or drive the power wire to avoid the related dangers caused by line breakage.
Please check the plug and power cable before application. When the power cable has been damaged, please disconnect the plug immediately. Please don’t use the equipment which has a damaged power line.
When the equipment is idle, please ensure that the plug has been pulled out. Meanwhile, the equipment has been closed, then, unplug the power supply.

Overview of Pumps

A. AUTOMATIC SELF-PRIMING WATER PUMP:
These pumps are equipped with automatic functions. It means that when the output valve opens, the pump operates, and vice versa;
B. SELF-PRIMING WATER PUMP:
These pumps have monolithic structures and self-priming functions with high hydraulic performance and a considerable pressure capacity;
C) CENTRIFUGAL WATER PUMP:
These pumps with large output flow can provide stable operation and low noise; Most of the pumps are used for irrigation purposes;
D) PERIPHERAL WATER PUMP:
These pumps with a feature of simple structure but with high heads efficiency is low;
E) MULTILEVEL WATER PUMP:
These pumps with several impellers which to be able to develop high pressure and high water lift but with low power consumption;

Conditions of Proper Use

The pump may maintain normal and continuous operation in the following conditions:

Maximum Ambient Temperature : + 40 Cº
Maximum Water Temperature: + 60 Cº
Maximum Operating Pressure: 8 bar
Maximum Altitude + 1000m

Electrical Connections

The installer is responsible for making the electrical connections to the main power supply in compliance with the relevant regulations in force.

Note the Italian and international regulations demand that fixed installations incorporate a device ensuring Omni polar disconnection from the main power supply;
Make sure that the specifications on the pump rating plate and the rated line values are the same(Fig.D);
Connect the pump to an effective earth circuit and then connect up the phases following the diagram on the terminal block cover rating late;
Check that three-phase pumps stage clockwise when looking at the pump from the motor fan side, swapping over two of the phase connections if they do not (Fig.E)

Warnings

The pump must be earthed safely;
The pump must be set on a dry base;
Do not operate the pump without water;
The pump is only used for pumping clean water or liquids similar to water without sands;

Installation Instructions

The pumps must be installed in a dry well-ventilated place with an ambient temperature of not more than 40 Cº(Fig. A). Fix the pump in place on a solid flat surface using suitable bolts to avoid vibration. The pump must be installed in a horizontal position to ensure that the bearings operate correctly . The diameter of the intake pipe must not be smaller than that of the intake month. If the intake height exceeds 4 meters, use a pipe with a larger diameter. The diameter of the delivery pipe must be chosen to suit the flow rate and pressure required at the take-off points. The intake pipe must be slightly angled up towards the intake mouth to avoid the formation of airlocks(Fig. B). Make sure that the intake pipe is completely airtight and immersed in the water by at least half a meter to avoid the formation of vortexes. Always fit a foot valve at the end of the intake pipe. It is disabled to fit a non-return valve between the delivery mouth and flow rate adjustment gate valve to avoid dangerous water hammering in the event of the pump suddenly stopping. This measure is compulsory if the delivery water column is over 20 meters.
The pipe muse always is fitted using the related brackets (Fig.C)to avoid transmitting stress to the pump body. Take care not to damage any part by over-tightening the pipes when fitting them.
Fill the pump completely with clean water before switching it on. The water should be poured in through the priming plug (Fig.F). When you have completed the operation screw the plug back in again and start the pump . The pump should be primed again whenever it has not been used for a long period of time or when air has made its way into the system.

Maintenance and Replacement

Our pumps do not require any maintenance provide one takes the following precautions: When there is a risk of freezing empty the pump through the drain plug on the bottom of the pump body. Make sure your prime it when subsequently starting it again; check that the foot valve is clean at regular intervals: If the pump is to remain unused for a long period of time(e.g.in the water )(Fig.G), it is advisable to empty it completely and rinse it with clean water and store it in a dry place; If the shaft does not turn freely, release it using a screwdriver inserting it in the special slot (Fig.H); If this is not sufficient to solve the problem , remove the pump body, undo the relevant mounting bolts, and clean it thoroughly, to remove any encrustation.

NEVER CARRY OUT ANY WORK ON THE PUMP WITHOUT HAVING FIRST DISCONNECTED IT FROM THE MAIN POWER SUPPLY. FAILURE TO TAKE THE ABOVE PRECAUTIONS COULD DAMAGE YOUR PUMP AND INVALIDATE THE GUARANTEE.

Τroubleshooting

FAULTS| CAUSES| TROUBLESHOOTING
Fail to start| Thermal protector acting Thermal protector damaged Faulty cord connection Cord disconnected Defective motor Impeller stuck Too low voltage| -If the motor is overheated, it doesn’t operate. Then, wait till getting cold(20~30minutes)
-Replace a new one
-Insert the plug securely
-Connect the cord again
-Replace the new cord
-Repair or replace the motor
-Clean the impeller
-Consult with the power supply company
Motor runs without pumping water| The water level of the well is lower than the standard level or the suction lift is too high Trouble in the non-return valve Filter apparatus or foot valve blocked Air drawn into the suction pipe Air is drawn into the pump from the mechanical seal.| -Check the water level of the well
-Move the pump closer to the water intake level.
-Take off the non-return valve cover, then clean the valve, the valve seat, and the valve hole
-Clean both of them
-After checking the joints of the piping, tighten them perfectly.
-Make sure the foot valve is immersed by at least 50cm.
-Replace the new mechanical seal
Thermal protector for motor works too often| Too low or high power supply voltage The impeller is in contact with another part. Impeller blocked Short or open circuit of the capacitor| -Consult with the power supply company
-Check and repair the defects
-Clean the impeller
-Repair the capacitor
Water does not come out from the pump at the first few minutes after switching on| Air is drawn into the suction pipe| -Repair the defects of piping. (To prevent air leaking)
Pump starts though no water is being used.| Water leaks at piping or pumps Water leaks at the mechanical seal| -Repair piping, pump parts, faucets, etc.
-Replace the mechanical seal
Flow rate insufficient| The suction lift reached the limit Filter apparatus or foot valve was blocked partially dogged. Impeller blocked| – Check the suction lift
-Check the valve or filter apparatus and check the whole suction piping if necessary.
-Disassemble the pump and carefully clean the pump body and impeller.