HITACHI WM Series Water Pump Instruction Manual

HITACHI WM Series Water Pump

Specifications:

• Model: WM-P150XX, WM-P200XX, WM-P250XX,WM-P300XX, WM-P350XX
• Motor Type:
• Output: 550W (WM-P150XX), 610W (WM-P200XX),630W (WM-P250XX), 650W (WM-P300XX), 680W (WM-P350XX)
• Suction Lift: Variable
• Discharge Head: Variable
• Capacity: Varies based on total head

Product Usage Instructions

Installation :

1. Ensure the power cord is not damaged and is installed correctly by a professional.
2. Use a Leakage Circuit Breaker specifically for the pump.
3. Check for any water leakage after installation to prevent damage.

Initial Setup:

1. After installation, open the hopper cap and fill in water.
2. Check for any leakage around the pump after filling water and close the hopper cap.

Deep Suction or Long Horizontal Pipe Setup:

1. Close the discharge valve.
2. Open the hopper cap and fill water until it reaches the pump housing cap position.
3. Operate the pump for approximately 5-6 minutes to remove air bubbles. Close the cap tightly.
4. If water is not pumped up, repeat the process until successful.
5. Once water is pumped up, stop the pump immediately and then open the discharge valve.

Maintenance:

• Wear gloves during maintenance to prevent injury.

INTRODUCTION

MODEL : WM-P150XX, WM-P200XX, WM-P250XX, WM-P300XX, WM-P350XX

Thank you for choosing to use the HITACHI pump and supporting the various products of the company.

Please read and understand the manual before using the pump.

Please keep this manual after reading it along with the warranty card as reference.

In the installation of the pump it is necessary to implement it suitsbly, so the buyer should ask the distributor to install it.
Should you want to know the name of the pump model, please read it from the nameplate on the body or the case.

PRECAUTIONS ON SAFE USE

Before using, please try to understand [the precautions on the safe use] carefully and use the pump correctly.

The precautions are shown as follows:
The level of damage and wear that may occur from abuse or ignorance of the warnings is shown in the table as follows.

Warning
Content in the symbol means [The danger may result in severe injury or death]

Precaution
Content in the symbol means [The danger may cause damage to assets or injury]

WARNING

• Do not disassemble, repair or modify the unit unless you are a professional serviceman.

• Do not Disassemble
  This may result in fire, malfunction or personal injury.

• Lake Circuit Breaker
  law You must always ground the appliance, and install a Leakage Circuit Breaker specifically fot it.

• Grounding
  If there is a defect or electric leak, it may cause a short circuit. For installation of an earth wire,please consult the distributor.

• While repairing you must take off the plug or cut off the electricity, and do not use wet hands to plug in or remove the plug out.
  Do not touch with wet hands
  It may cause a short circuit.

• Do not use the pump while its cover is removed.

• Prohibition
  It may cause a short circuit or fire from dust or degenerated insulation.

• Cleaning
  In case there is dust on the plug blades or surface, please clean it.If not, it may cause a fire.

• Repairing
  One should remove the plug out or turn off the switch immediately to prevent an accident.
  In case the pump works abnormally or does not work,call the distributor for inspection and repair.
  There is a risk of fire, short-circuit,power leak, and electric shock.

• Wiring
  Wiring should be made with correctness and safety according to the internal requirements on technical standards for electrical appliances.
  Faulty wiring may cause a short circuit or fire.

• Prohibition
  Do not roll, twist, pull, bend or modify the power cord or cause a mark or damage on it. Do not put heavy things on it, clip, or modify the cord.
  The power cord may be damaged and cause a short circuit.

PRECAUTION

• Power Supply
  In the event of not using it for a long time, remove the plug out of the outlet or turn off the switch.
  If not, it may cause a fire from a electric leak or short circuit due to degenerated insulation.

• WARNING
  While removing the plug, pull the plug body.
  If not, it may cause a electric shock.

• If the power cord is damaged, it must be replaced by the distributor agent or similarly qualified persons in order to avoid a danger.

• Prohibition
  Do not place objects on the pump.
  It may cause the pump is damaged.

• Do not place flammable materials inside the pump cover, and do not cover the pump with any material.
  The pump will overheat, due to inability to vent which may result in fire or pump damage.

• WARNING
  The appliance is not intended for use by persons (including children) with reduced physical,sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
  Children should be supervised to ensure that they do not play with the appliance.
  

• Prohibition
  Do not touch the pump motor while the pump is running.
  Due to the high temperature, it may cause a scald.

• CAUTION
  Check whether the flooring offers effective leakage prevention and drainage.
  Otherwise, in the case of a water leak, it may cause damage to the pump

• Prohibition
  Do not use the pump with other liquids such as oil, thinner or hot water at 40°C or more.
  Otherwise, it may cause injury or a short circuit.
  Components of the pump,such as plastic, rubber parts, can be damaged.

• CAUTION
  While performing maintenance, should wear the gloves during working.
  To prevent possible injury.
  

• Prohibition
  Dy Run) Do not dry run it.
  The water left in the pump may overheat and cause the parts damage.

• CAUTION
  Check the installation area.
  Avoid sites that are easily flooded, as it may cause damage to the pump.

Please read the operational manual with understanding before installing and using Pump.

CAUTION

1. Be careful after filling water,tighten the hopper cap to prevent leaking water.
2. Check the possibility of leaking in step of installing pump (by turning on pump) with certainty before closing the pump cover.
3. Do not open the cover while using.

PART NAMES AND STRUCTURE

Bladder Tank

CAUTION

Do not remove the plug

Only the surface of the rubber and plastic are exposed to water.

ACCESSORY

Strainer
In the event of sucking from a well or a reservoir tank, assemble the strainer to prevent the waste entering the pump.

This pump model does not require the check spring.

Prohibition

• Adjusting the pressure switch may cause the pump malfunction and cause the parts damage. The warranty will be terminated instantly if you adjust pressure switch.

CAUTION

How to prime it

1. After installation on the first run, open the hopper cap and fill in some water
   While filling water, must not be overflow and be careful the water touching any electrical element such as motor, electronic parts, etc.
   For Pumo lower than 350W water must be filled more than 400ml )

2. After filling water, close Hopper cap. Then check the leakage around the pump.

3. In the case of a height of suction is deep 6-8 meters, or length of horizontal pipe is long. Plesase follow these steps.
   Close the discharge valve (as picture below).

4. Open the cap (Hopper cap) and a fill the water. Until full of water from the pump housing cap position. After closing cap, do not tighten.

5. Operate the pump for the air out approximately 5-6 minutes. The pressurized water up to the cap. Immediately turn off the cap and tighten.

6. If the water is not out yet, add more water and do the same. Until pumped up.
   If water pumped up, the pump will be stop working immediately. After that opening the discharge valve. It is finished.

When pumping from deep water or the pump lines are laid horizontally for a great distance, may affect the water suction time.

SPECIFICATIONS

The valves shown in the table variable according to the condition such as pipe diameter number of bent point, foot valve and others.

INSPECTIONS BEFORE INSTALLATION

Check the installation site.

• Choose the place that can easily be checked or serviced.
• It should be installed near the well as much as possible.
• Horizontal piping distance (from the well to the pump) is restricted by the suction height. (From the water level to pump center) set the suction range considering the water level is reduced at minimum level (during the summer time)
• Do not use soft pipes (PE pipe) on hose to connect the suction and discharge side,cause the efficiency of pump became less or easily get in the air.

Limit of the pipe in horizontal lengths is based on the suction height.

Check the sand
Avoid installing water pump in sandy well, it cause damage to the pump.

PRECAUTION

In case of the impeller of motor lock, it may caused by sand or PVC pipes scrap getting stuck in the impeller to check as follows.

• Remove the power plug before repair.
• Drain water out of the pump first.
• Use a wrench to remove the Hex bolt M5 x 20 sus.
• Remove the sand or PVC scrap and clean it up.
• Clean up before replacing the casing cover, tighten the Hex bolts.
• Put the plug in and check the motor operation rotate or not. If no rotate, please contact the distributor.

PRECAUTIONS BEFORE INSTALLATION

Check the installation site to make sure that it has good drainage.
If water leakage, it can result in serious damage.

The water pump should be installed in a horizontal plane,tigthen with nut to avoid abnormal sound from vibration.

The water pump should be installed in a location protected from rain or direct sunlight and well ventilated area.

The water pump should be installed more than 1 meter away from the water tank to prevent water hammer from closing the pump.

(Water hammer)
The water pump should not be installed by attaching to the wall,it will cause noise from the water hammer.

The water pump should not be installed on the water tank without air vent,it will cause abnormal humidity and temperature and cause damage to the product.

INSTALLATION ROUTING THE HARNESS

WARNING

Wiring should be considered a safety priority and comply with the technical standard of the electrical appliance or internal wining!
Faulty wiring may cause a fire or electric shock.

Leake Circuit Breaker
Please connect the ground wire and install a leakage circuit breaker.

WARNING
You must connect a ground wire and install a leakage circuit breaker specifically for this job.
You may have an electric shock when the pump is malfunction.
Install the ground wire to prevent accidents from electric shock when electrical leakage occurs. Grounding and leakage circuit breaker require installation by an electrician specialist. The plug cord must be disconnected from the electrical outiet first and then installed.

Precautions
Do not install the ground wire in the following places. (it is legal prohibition)

• Where there is a gas pipe, telephone line, lightning rod and plumbing.

• Curcuit Breaker
  Installing Leakage Circiut Breaker

• Please Install a circult breaker with the working current less than 15 mA.
  In the case where there is an existing circuit breaker, check as specified above,

HOW TO INSTALL THE PUMP

Installation of the pump depends on suitability of the house or building using the following characteristics:

In case the pumping for tank is on the ground.

In the case of pumping water from a well (should install near the well as much as possible).

PVC Precaution in the installation of PVC pipes

1. Using a tool (saw blade) to cut it will produce PVC waste.
2. Clean the PVC waste with sandpaper or similar material.
3. The cause of pump is not working (motor lock) usually is from PVC waste stuck in the impeller.
   The cause of pump is not working (motor lock) usually is from PVC waste stuck in the impeller.

Preparation before the installation

1. The suction and delivering ranges can be found on the specification of the pump for each model. (Specification page 6)
2. The installation should use the bent joints to a minimum in order not to lose efficiency of water delivery.
3. Do not adjust the pressure switch because it may cause the abnormal operation or pump damaged.
4. If the pump is pumping water from a reservoir or a shallow well, the foot valve should not be installed at the end of pipe because the pump a ready nas a check valve.
5. The installation should install a ground wire to prevent danger in case the insulation deteriorates
6. In case of breakdown during the installation or use, contact the serviceman or distributor.

PROBLEMS AND REPAIRS

When there is a problem during usage, you should stop the pump, remove the plug, and check to find the cause or consult your distributor.

WIRING DIAGRAM

WM-P150XX, WM-P200XX, WM-P250XX, WM-P300XX, WM-P350XX

• WM-P150XX 6,765
• WM-P200XX 7,920
• WM-P250XX 8,525
• WM-P300XX 9,405
• WM-P350XX 10,890

FAQ

Frequently Asked Questions

Q: What should I do if the pump works abnormally or does not work?
A: In case of abnormal operation or failure, contact the distributor for inspection and repair immediately.

Q: Can I adjust the pressure switch on the pump?
A: Adjusting the pressure switch may cause malfunction and void the warranty instantly. Avoid adjusting it yourself.

Q: How should I handle a damaged power cord?
A: If the power cord is damaged, it must be replaced by the distributor agent or a qualified person to avoid any danger.

CONTACTS

• MANUFACTURER : Hitachi Consumer Products (Thailand), Ltd.
• ADDRESS : Kabinburi Factory 610/1 Moo 9 Tambol Nongki
• DISTRIBUTOR Amphur Kabinburi, Prachinburi, Thailand 25110
• Tel. 0-3728-400 (19 Line)
• Fax: 0-3728-4161
• ADDRESS : TOYOBO (THAILAND) CO., LTD.
• 944 Mitrtown Office Tower, 11th Floor room 1103-1106,Rama 4 road, Wangmai, Pathumwan, Bangkok 10330
• Tel. 02-7663942-48 Fax: 02-1082677
• e-mail: pump@toyobo.co.th

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