Kawamoto Pump KAWA-ACE NR User manual

Instruction Manual
Thank you for purchasing our home pump.
Please make sure to read this manual and have a full
understanding of the contents before starting use.
This manual provides precautions for preventing
personal injuries or physical damage.
After reading, keep this instruction manual in a safe
place for quick reference.
Home pump
KAWA-ACE
®
NR type
BT001
No. 87230430
For storage
Uniting water with an abundant lifestyle .................. Kawamoto Pump
Contents
Important safety instructions . . . . . . . . . . . . . . 2
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Names of parts . . . . . . . . . . . . . . . . . . . . . . . . 7
How to use. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Water quality testing . . . . . . . . . . . . . . . . . . . . 9
Product specification . . . . . . . . . . . . . . . . . . . . 9
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . 27
Specialty constructions are necessary for installation of this
product. Read "Installation and preparation" thoroughly and
understand the content before starting operation. Do not install
and prepare the product by the customer.
Important safety instructions . . . . . . . . . . . . . 10
Installation and piping . . . . . . . . . . . . . . . . . . 16
Electrical work . . . . . . . . . . . . . . . . . . . . . . . . 19
Trial operation . . . . . . . . . . . . . . . . . . . . . . . . 20
Inspection and maintenance . . . . . . . . . . . . . 24
Replacing consumables . . . . . . . . . . . . . . . . 26
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 27
How to handle (for customers)
Installation and preparation (for construction shops)

2
How to handle (for customers)
Specifications
Prohibition
Never operate the pump at a pressure higher than the maximum operating pressure. Failure to
do so could result in serious accidents.
Bring-in and installation
Prohibition
Do not connect the pump directly to the
water pipe. It is possible that the tap water becomes
contaminated by counter flow of water.
Request the installation to the dealer
(construction shops). Inappropriate construction
may cause electric shock, fire, injury by falling on over-
turning.
While unpacking, be careful with nails
and staples. Failure to do so could result in injury.
Store the pump at a location, where a
lock is provided, such as a pump room.
Or take an appropriate measure such as
installing the fence or enclosure, so any
irrelevant person cannot easily touch the
pump. Otherwise, anyone may touch the rotating
parts or hot parts, causing injury; settings on the electric
parts box or valve open/close state may be improperly
changed, causing abnormal operation of the pump and
water flow to stop.
Prohibition
Do not burn the resin and rubber parts
at the site. Burning resin and rubber could result in
emission of hazardous gases.
How to handle
Important safety instructions
This manual provides precautions for using this product safely and for preventing personal injuries or physical
damage.
The precautions are classified as "DANGER," “WARNING,” and “CAUTION” to indicate the degree of possible
injury or damage and urgency in case of improper handling.
All precautions are important matters related to safety and must be observed.
Contents of hazard degree indicated by "Danger," "Warning," or "Caution"
DANGER Contents which if ignored could lead to imminent death or serious injury
WARNING Contents which if ignored could lead to death or serious injury
CAUTION Contents which if ignored could lead to personal injury or physical damage
Symbols
This symbol ( ) indicates
items requiring caution.
For example, the symbol
means “electrical shock
hazard”.
This symbol ( )
indicates items you must
not do. For example, the
symbol means “no
disassembling”.
This symbol ( ) indicates
something that you must do. For
example, the symbol means
“forcing execution” and means
“grounding must be done”.
DANGER
W
WARNING

3
How to handle (for customers)
Bring-in and installation
For longer use of the product, install
the product at a well-ventilated place
without dust, corrosive gas, explosive
gas, salt, humidity, vapor, condensation,
and exposure to wind, rain, and direct
sunlight. When the product is installed in an
improper environment, short circuit, electric shock, or
fire may be caused due to faulty insulation of the motor
or electric parts box.
Prohibition
Do not use the pump in an explosive
environment. Otherwise, fire may be caused.
Electrical work
Avoid connecting multiple electric
devices to one outlet (octopus outlet)
and construct wiring by using the special
wiring. Otherwise, short circuit, electric shock, or fire
may be caused.
Remove dust from the power plug, wire
connecting part, junctions, and terminals.
Accumulated dust may be heated up and causes fire.
Prohibition
Insert the power plug completely and do
not use damaged plugs. If the plug is inserted
incompletely, electric shock or fire may be caused.
Operation and trial operation
When connecting or disconnecting the
wiring, always shut down the power
before you start operating. Failure to do so
could result in electric shock.
Prohibition
After the power is turned on or while the
power is on, do not touch the charging
part of the electric parts box, motor
terminals, and cable ends. Otherwise, short
circuit, electric shock, or fire may be caused.
Prohibition
Do not use the pump with the pump cover
removed. Failure to do so could result in short circuit,
electric shock, or fire from the accumulated dust or
faulty insulation.
Prohibition
Do not splash water on the motor and the
control panel (electric parts box). Otherwise,
electric shock, short circuit, or fire may be caused.
In case of the power outage, turn off the
power switch. Otherwise, the product and the
facility may get damaged, or the pump may suddenly
start moving and cause injury at the time of power
recovery.
Prohibition
Do not put hands or feet near the suction
port during operation. Suction into the port may
cause injury.
Prohibition
Do not use or operate the product in a
hoisted condition. The product may fall down,
and injury may be caused.
Inspection/Maintenance
If the product stops working or if any
abnormality is sensed (i.e., broken
cable or burning smell), stop operation
immediately and shut down the power.
Then contact the place of purchase
for inspection or repairs. If the product is
continuously operated in an abnormal condition or the
repair is inappropriate, short circuit, electric shock, fire,
and/or water leakage may be caused.
Do not
disassemble
or modify
This product must be disassembled,
repaired or modified only by a qualified
repair technician. Improper repairs could result in
malfunction, damage, electric shock, and fire.
When inspecting or replacing the product,
always shut down the power before you
start working. Failure to do so could result in short
circuit, electric shock, or injury.
When moving and reinstalling the
product, consult the place of purchase. If
the product is improperly installed, short circuit, electric
shock, fire, or water leakage may be caused.
When inspecting or replacing the electric
part such as the control panel (electric
parts box), be sure to check with a tester
that there is no voltage remained before
you start working. Failure to do so could result in
electric shock, or injury.
If the motor insulation resistance is
decreased to 1M
Ω
or lower, immediately
contact the place of purchase. Otherwise, the
motor may get burnt out, or electric shock or fire may be
caused.
When repairing the product, use our
genuine parts. If any part other than the genuine
parts is used, breakage or accidents may be caused. In
addition, the product could not be used with its optimal
condition.
WARNING

4
How to handle (for customers)
Product specifications
Perform repair coating at an interval that
suits to your use condition of the product.
At screws, and processed parts and other parts with
antirust coating, rust may be caused in an environment
with high humidity, condensation, and water splash. The
rust may cause unexpected damages and injuries.
Select a product that is the most suitable
for your application. Use for improper application
may lead to an accident.
Prohibition
Warning to
electric shock
Always use this product within the
specified specifications. Failure to do so could
result in electric shock, fire, water leakage, etc.
The Danger, Warning, and Caution labels
have contents that could endanger
people's lives or damage properties. Be
sure to follow the instructions on the
labels. Otherwise, the product may get broken, or
electric shock, fire, injury, etc. may be caused.
Prohibition
Do not use the product for fluids that are
out of the range of specified fluid quality.
Otherwise, the pump may get broken, and short circuit,
electric shock, and fire may be caused.
For applications for living things (such as
fish farm, fish preserve, and aquarium) or
for important facility, prepare the spare
pump. Otherwise, malfunction of the pump will cause
oxygen deficiency and water quality deterioration,
causing risks to lives that are under influence of the
pump.
For applications for transfer of food,
check the use materials carefully. Failure to
do so could result mixing of foreign objects.
Do not use this product for living things
that are not compatible with copper alloy.
Otherwise, risks to lives may be caused.
Bring-in and installation
Prohibition
Do not give a shock or tumble the
product. Otherwise, the product may get broken.
When the product is used for drinking
water, perform water quality inspections
at the installation and periodically
according to the instructions from the
specialized agencies. If the water quality is
deteriorated, drinking such water may cause health
damage.
Prohibition
Do not put objects on the product or do
not mount on the product. Otherwise, the
product may get broken or a mounted person may get
injured by tumbling.
Prepare a buzzer or other facility for
alarms, so the malfunction of the product
can be confirmed. Failure to do so could result
in serious accidents due to continuous use of the
malfunctioning product.
޺ȁগ
Do not make any modifications such as
drilling holes to the control panel (electric
parts box). Drill fragments, iron filings, etc. created
by such modifications may attach to parts and cause
fires or malfunction.
If there is any possibility of congelation
during winter period, prevent congelation
by using lagging material or heater. Failure
to do so could cause damages due to congelation.
Tidy up the surrounding environment
before starting the installation, inspection,
or other operation. Failure to do so could result in
injury by slipping and tumbling.
Prevent air from accumulating in the
pipes. Failure to do so may cause abnormal operation
of the pump.
Prohibition
Do not directly connect the commercial
power supply to the motor. Otherwise, fire,
malfunction, or breakage may be caused.
Prohibition
Do not cover your head with the plastic
bag used for packing of the product.
Otherwise, suffocation may be caused.
Electrical work
Prohibition
Do not scratch, damage, process, forcibly
bend, pull, twist, bundle, or pinch the
power cable. Do not put a heavy object
on the power cable. Otherwise, the cable breaks,
and fire or electric shock may be caused.
Operation and trial operation
If the water was not used for a long
period, run the water for a while and
check that the water becomes clean
before you start using the water. If the water
quality is deteriorated, drinking such water may cause
health damage.
Prohibition
Do not use this product in a range
outside the rated voltage. Failure to observe
this could result in fire or electric shock.
Check that the rotating direction is right.
If rotated in the wrong direction, impeller nuts or bolts
may get loose and cause an accident.
CAUTION

5
How to handle (for customers)
Operation and trial operation
Prohibition
Caution for
rotating parts
Do not insert
fingers in
rotating parts
Do not touch rotating parts or insert
fingers or objects in the opening during
operation. Failure to observe this could result in
electric shock, damage, or personal injury.
Do not touch
Very hot:
do not touch
Do not touch the pump, motor, and heater
during or immediately after operation.
These parts can be very hot and cause burns.
Shut off the power when not using the
product for a long time. Failure to do so could
result in short circuit, electric shock, or fire from faulty
insulation.
Prohibition
Do not idle or perform shut off operation
of a certain period of time. In addition, do
not allow mixing of air into the handling
fluid. Otherwise, casing, bearing, shaft seal may
get damaged, or pumping becomes unavailable. In
addition, the pump may get overheated, causing a
burn.
Check that the pump and pipes are filled
with water. Lack of water may result in fire or
disconnection of the heater.
Prohibition
Do not operate a 50Hz-specified pump in
60Hz. Otherwise, a breakage due to an excessive
pressure or motor burnout due to overload may be
caused.
Do not operate a 60Hz-specified pump in
50Hz. The pump performance may be degraded.
Use valves in the designated condition.
Otherwise, the product cannot be operated properly,
causing damages in the units.
Prohibition
Do not place flammable objects around
the pump, cable, or in the pump cover.
Or do not cover these parts with a
flammable object. Flammable objects may get
overheated, causing a start of fire.
At startup of the operation after long-
time storage or a recess, perform a trial
operation by following the "installation"
and "operation" procedures in a specified
order. There are possibilities of pump constraint by
seizure, motor burnout, or idling by water drainage.
Operate the pump within the specification
range. Failure to do so may cause pump damage or
accident.
At the time of trial operation, remove air
in the product and pipes thoroughly. Failure
to do so may cause air lock of the pump, temperature
increase, causing breakdown or accident.
Prohibition
At the time of priming and exhaust, avoid
splashing of water over the product.
Otherwise, short circuit, electric shock, fire, or
malfunction may be caused.
Inspection/Maintenance
When the product is not used during
winter time, turn off the power and drain
water from the pump and pipes. When the
product is left with water inside of the pump and pipes,
the pump may get damaged due to congelation of the
pump.
Prohibition
When the pump is hot, do not remove the
plug (priming cup/exhaust outlet). Failure
to observe this could result in spouting of boiling water
and causing a burn.
When the pump is not used for a long
time, drain water from the pump and
pipes. Otherwise, accumulated water may get rotten,
and bacteria may be increased.
To use the product safely for a long time,
conduction of both periodical and daily
inspections are recommended. Failure to do
so may cause breakage of pump and accident. For the
periodical inspection, consult the place of purchase.
Periodically check the performance of
protective relay. The product does not operate
properly at the time of accident, causing electric shock
or malfunction.
Replace the consumables periodically.
When the consumables are continuously used in
deteriorated and worn-out condition, accidents such
as water leak, seizure, and breakage may be caused.
For the periodical inspection and replacement of parts,
consult the place of purchase.
When the pressure gauge or the
compound gauge is used, keep the cock
closed while the gauge is not used for
measurement. If the cock is kept opened all the
time, the pressure gauge or the compound gauge may
get broken.
Be sure to perform the inspection by
following the inspection items. Otherwise,
generation of malfunction cannot be prevented in
advance, causing accidents.
CAUTION

6
How to handle (for customers)
Unpacking
After unpacking, please check the following items. In case of problems, contact the place of purchase.
●Check the nameplate to ensure that the correct product has been delivered.
●Check that no parts have been damaged during transportation, and that no bolts, nuts, etc. are loose.
Tighten any parts that are loose.
●Make sure that all of the ordered accessories have been included.
Main unit Strainer Instruction manual
25mm: 200, 250W
Note:
The ground bar or ground plate is not included. Prepare either of them by yourself.
BT002 BT003 AL005
Notes
●The following cases may be out of the scope of warranty range: use outside of the application range,
disobedience to caution and other messages, inappropriate repair and modification, problem occurred
due to nature of God, problem occurred due to installation environment (abnormal power supply, foreign
object, sand, etc.), conditions not complying laws, regulations, and equivalent rules, malfunction due to
carelessness or by intention, problem due to replacement of consumables or due to resale.
●When contacting us, please provide "model" and "manufacturing number" of your product.
●For the disposal method of unnecessary parts and packing materials, check with laws, ordinances, or
standards etc. based on the laws.
* The illustrations in this manual show a typical model of the NR type. Some models differ slightly from the
illustrations.

7
How to handle (for customers)
Pump cover
Motor
Accumulator
Heater
Electric parts box
Motor
Fine sensor
Hexagonal
drainage plug
Front
Accumulator
Electric parts box
Base
Power cord
Plug
(Priming cup/
exhaust outlet)
Plug
Back
(2m)
Connector
(Earth terminal)
Condenser
Power plug
Fine sensor
(priming cup/
exhaust outlet)
Nameplate
Rhombic flange
with valve seat
Rhombic flange
(discharge opening)
(suction opening)
Names of parts
The illustrations below shows a typical model of the NR type. Some models differ slightly from the illustrations.
Caution
Make sure to remove the protector (cardboard) inside the pump cover before using the product.
BT024

8
How to handle (for customers)
SOURCE TROUBLE
RESET
SENSOR
MOTOR
FLOAT
Fine sensor
Source lamp
Trouble lamp
Reset button
Motor
Power source
Shorting wire
(for float switch)
Lamp indications
If there is no water even when the faucet is turned on, remove the pump cover, and then check the condition of
the lamps.
Source lamp
Lights up in red when the power is on.
Trouble lamp
Lights up or flashes in orange if there is a defect in the electric parts box, motor, or pump. At the same time, the
pump stops automatically. Refer to “Troubleshooting” (page. 27) for detailed procedure for the failures.
* When the trouble lamp lights, remove the cause of failure and reset the pump by pressing the reset button
after 10 minutes.
Caution
When carrying out inspection or maintenance of the pump, do not touch the motor and connectors with the
power on.
Mechanism of this product
When turning on the faucet, the water pressure inside this product (pump) decreases. When the built-in
fine sensor
(
*
1)
detects a pressure failure, the pump operates automatically to set the water pressure back to
the prescribed level. When the water supply reduces to less than approximately 4 liters/min by turning off
the tap, the fine sensor detects it and the pump stops automatically. (The pump may not stop soon because
of the timer function. This is not a failure.)
(*1) The sensor that has the pressure transmitter and flow switch necessary for the automatic operation of the pump in
one unit
BT025
Removing and attaching the pump cover
How to remove
1Loosen both screws on the pump cover.
2Remove the pump cover.
How to attach
1Align the notches on both sides of the pump cover
with the screws on both sides of the base, and then
attach the pump cover to the base.
2Fasten both left and right screws to the pump cover.
* The pump cover will be secured. Confirm that the
pump cover does not move or cannot be easily
removed.
Screw
Screw
Base
Pump cover
Electric parts box
BT026

9
How to handle (for customers)
How to use
The construction shop will perform operations from the installation throughout the trial operation. Preparation by
the customer is not required. When the power is on, the pump operates automatically simply by turning on/off
the faucet.
Caution
・A squeak is made when the pump starts or stops. This is not a failure.
・This product starts/stops automatically. This is not a failure.
・When any failure occurs in this product, refer to “Troubleshooting” on page 27.
Water quality testing
Please note the following when requesting testing for water quality by the specialized agencies, etc.
(1) Use water obtained from a faucet for a water examination.
(2) When doing a microbiological examination
・Use a water container for testing bacteria sterilized at the specialized agencies.
・Do not touch the inside of the container or lid to prevent bacterial contamination.
・To prevent contamination, immediately request testing at the specialized agencies after obtaining water
samples.
(3) Contact the specialized agencies for other details about water quality testing.
Product specification
Pumping fluid
Fluid quality,
fluid temperature
Clean water (pH. 5.8 to 8.6), 0 to 40°C (no freezing), leaching
performance standards conforming product
Chloride ion
concentration
200mg/L or less
Solid object concentration, diameter 50mg/L or less, 0.3mm or less
Installation location (ambient
temperature/humidity)
Indoor, outdoor (0 to +40°C/90% RH or less)
Suction condition Total suction head: within -8m (20°C) / pour head: within 5m
Supply voltage Single phase 200V
(within +/-10%, interphase unbalance rate: 3% or lower)
Frequency 50Hz or 60Hz exclusive
Main circuit switch Solid state relay (SSR)
Motor protection method Auto-cut off by thermal protector (built-in motor)
Indicator Source lamp, trouble lamp
CAUTION
Install the product at an altitude of 1000m or lower. If the product must be installed at a location of
an altitude above 1000m, consult the place of purchase.

10 For construction shops
Installation and preparation (for construction shops)
Bring-in and installation
޺ȁগ
Do not connect the pump directly to the
water pipe. It is possible that the tap water becomes
contaminated by counter flow of water.
Install the product surely by following
the instruction manual. Install the pump
horizontally on the footing, and fix with the foundation
bolts. Inappropriate installation may cause short circuit,
electric shock, fire, injury by falling or over-tumbling. In
addition, pump vibration may also be caused.
Follow the applicable laws and
regulations for the construction.
Inappropriate construction not only fails to comply with
regulations but also may cause electric shock, fire,
injury by falling or over-tumbling.
While unpacking, be careful with nails
and staples. Failure to do so could result in injury.
Specifications
޺ȁগ
Never operate the pump at a pressure higher than the maximum operating pressure. Failure to
do so could result in serious accidents.
Installation and preparation (for construction shops)
Specialty constructions are necessary for installation of this product. Read "Installation and preparation" thoroughly
and understand the content before starting operation. Do not install and prepare the product by the customer.
Important safety instructions
This manual provides precautions for using this product safely and for preventing personal injuries or physical
damage.
The precautions are classified as “DANGER,” “WARNING,” and “CAUTION” to indicate the degree of possible
injury or damage and urgency in case of improper handling.
All precautions are important matters related to safety and must be observed.
Contents of hazard degree indicated by “Danger,” “Warning,” or “Caution”
DANGER Contents which if ignored could lead to imminent death or serious injury
WARNING Contents which if ignored could lead to death or serious injury.
CAUTION Contents which if ignored could lead to personal injury or physical damage.
Symbols
This symbol ( ) indicates
items requiring caution.
For example, the symbol
means “electrical shock
hazard”.
This symbol ( )
indicates items you must
not do. For example, the
symbol means “no
disassembling”.
This symbol ( ) indicates
something that you must do. For
example, the symbol means
“forcing execution” and means
“grounding must be done”.
DANGER
W
WARNING

11
For construction shops
Installation and preparation (for construction shops)
Bring-in and installation
Store the pump at a location, where a
lock is provided, such as a pump room.
Or take an appropriate measure such as
installing the fence or enclosure, so any
irrelevant person cannot easily touch the
pump. Otherwise, anyone may touch the rotating
parts or hot parts, causing injury; settings on the electric
parts box or valve open/close state may be improperly
changed, causing abnormal operation of the pump and
water flow to stop.
If there is any possibility that internal
pressure of the discharging pipe
increases due to high temperature during
summer time, install an appropriate
depressurizing equipment (such as a
safety valve). Due to pressure increase, the pipes
and valves may get damaged, causing injury.
Prohibition
Do not burn the resin and rubber parts
at the site. Burning resin and rubber could result in
emission of hazardous gases.
For longer use of the product, install
the product at a well-ventilated place
without dust, corrosive gas, explosive
gas, salt, humidity, vapor, condensation,
and exposure to wind, rain, and direct
sunlight. When the product is installed in an
improper environment, short circuit, electric shock, or
fire may be caused due to faulty insulation of the motor
or control panel (electric parts box).
Prohibition
Do not use the pump in an explosive
environment. Otherwise, fire may be caused.
Prohibition
Do not connect an inverter. Connecting an
inverter may result in fire or damage to the condenser.
Electrical work
Electrical work must be performed by a
professional engineer. Improper wiring and
connection could result in malfunction, short circuit,
electric shock, and fire.
Be sure to
connect to
ground
Be sure to connect the earth ground wire
to the product. Malfunctions or short circuits may
result in electrical shock if not connected. (Refer to page
19 for details.)
Be sure to
connect to
ground
Be sure to make the ground connection
before starting any electrical operations.
Operations without secure grounding could result in
malfunction, short circuit, electric shock, and fire.
Avoid connecting multiple electric
devices to one outlet (octopus outlet)
and construct wiring by using the special
wiring. Otherwise, short circuit, electric shock, or fire
may be caused.
Remove dust from the power plug, wire
connecting part, junctions, and terminals.
Accumulated dust may be heated up and causes fire.
Before turning on the power, check
that the wire connecting section and
junctions are not loose or unconnected.
Even one section loosened or disconnected may cause
fire or electric shock.
Prohibition
Insert the power plug completely and do
not use damaged plugs. If the plug is inserted
incompletely, electric shock or fire may be caused.
Operation and trial operation
When connecting or disconnecting the
wiring, always shut down the power
before you start operating. Failure to do so
could result in electric shock.
Do not touch
After the power is turned on or while the
power is on, do not touch the charging
part of the electric parts box, motor
terminals, and cable ends. Otherwise, short
circuit, electric shock, or fire may be caused.
Prohibition
Do not use the pump with the pump cover
removed. Failure to do so could result in short circuit,
electric shock, or fire from the accumulated dust or
faulty insulation.
Prohibition
Do not splash water on the motor and the
control panel (electric parts box). Otherwise,
electric shock, short circuit, or fire may be caused.
In case of the power outage, turn off the
power switch. Otherwise, the product and the
facility may get damaged, or the pump may suddenly
start moving and cause injury at the time of power
recovery.
Prohibition
Do not put hands or feet near the suction
port during operation. Suction into the port may
cause injury.
Prohibition
Do not use or operate the product in a
hoisted condition. The product may fall down,
and injury may be caused.
WARNING

12 For construction shops
Installation and preparation (for construction shops)
Inspection/Maintenance
If the product stops working or if any
abnormality is sensed (i.e., broken
cable or burning smell), stop operation
immediately and shut down the power.
Then contact the place of purchase
for inspection or repairs. If the product is
continuously operated in an abnormal condition or the
repair is inappropriate, short circuit, electric shock, fire,
and/or water leakage may be caused.
Do not
disassemble
or modify
This product must be disassembled,
repaired or modified only by a qualified
repair technician. Improper repairs could result in
malfunction, damage, electric shock, and fire.
When inspecting or replacing the product,
always shut down the power before you
start working. Failure to do so could result in short
circuit, electric shock, or injury.
When moving and reinstalling the
product, consult the place of purchase. If
the product is improperly installed, short circuit, electric
shock, fire, or water leakage may be caused.
When inspecting or replacing the electric
part such as the control panel (electric
parts box), be sure to check with a tester
that there is no voltage remained before
you start working. Failure to do so could result in
electric shock, or injury.
If the motor insulation resistance is
decreased to 1MΩor lower, immediately
contact the place of purchase. Otherwise, the
motor may get burnt out, or electric shock or fire may be
caused.
When repairing the product, use our
genuine parts. If any part other than the genuine
parts is used, breakage or accidents may be caused. In
addition, the product could not be used with its optimal
condition.
Product specifications
Perform repair coating at an interval that
suits to your use condition of the product.
At screws, and processed parts and other parts with
antirust coating, rust may be caused in an environment
with high humidity, condensation, and water splash. The
rust may cause unexpected damages and injuries.
Select a product that is the most suitable
for your application. Use for improper application
may lead to an accident.
Prohibition
Warning to
electric shock
Always use this product within the
specified specifications. Failure to do so could
result in electric shock, fire, water leakage, etc.
The Danger, Warning, and Caution labels
have contents that could endanger
people's lives or damage properties. Be
sure to follow the instructions on the
labels. Otherwise, the product may get broken, or
electric shock, fire, injury, etc. may be caused.
Prohibition
Do not use the product for fluids that are
out of the range of specified fluid quality.
Otherwise, the pump may get broken, and short circuit,
electric shock, and fire may be caused.
For applications for living things (such as
fish farm, fish preserve, and aquarium) or
for important facility, prepare the spare
pump. Otherwise, malfunction of the pump will cause
oxygen deficiency and water quality deterioration,
causing risks to lives that are under influence of the
pump.
For applications for transfer of food,
check the use materials carefully. Failure to
do so could result mixing of foreign objects.
Do not use this product for living things
that are not compatible with copper alloy.
Otherwise, risks to lives may be caused.
Bring-in, installation, and water quality
Prohibition
Do not scratch, damage, process, forcibly
bend, pull, twist, bundle, or pinch the
power cable. Do not put a heavy object
on the power cable. Otherwise, the cable breaks,
and fire or electric shock may be caused.
Prohibition
Do not install the pump at a location
without a water drainage treatment and
a water-proof treatment. Otherwise, when the
water leaks, serious damage may be caused.
* Damages occurred due to a facility without water drain
and water preventive treatments are not within the
responsibility of Kawamoto Pump.
CAUTION
WARNING

13
For construction shops
Installation and preparation (for construction shops)
Bring-in, installation, and water quality
Do not use
pump in
humid location
Do not install the pump at a location with
a lot of moisture such as a bathroom. If a
short circuit occurs, it could result in electric shock.
Prohibition
Do not install in locations such as
machinery and chemical factories
where harmful gases containing acid,
alkali, organic solvents, paint and gases
containing corrosive components are
generated or in where dust is abundant.
Doing so may result in short circuits or fire.
Prohibition
Do not give a shock or tumble the
product. Otherwise, the product may get broken.
When the product is used for drinking
water, perform water quality inspections
at the installation and periodically
according to the instructions from the
public health department. If the water quality
is deteriorated, drinking such water may cause health
damage.
Prepare the spare pump for unexpected
breakdown of the pump. Water supply may be
stopped, and the facility may get stopped.
Depending on the facility, attach a filter
appropriate to the discharge side and
flush sufficiently and confirm there are
no foreign objects before using the
pump. There may be a risk of contaminating the
treatment solution with cutting oil, rubber mold releasing
agents and other foreign matter at the time of product
manufacturing, or cutting oil and other foreign matter
included in the piping system.
Remove the companion flange from the
pump and insert into the pipe. Otherwise,
damage or water leak may be caused.
Prohibition
Do not put objects on the product or do
not mount on the product. Otherwise, the
product may get broken or a mounted person may get
injured by tumbling.
Prepare a buzzer or other facility for
alarms, so the malfunction of the product
can be confirmed. Failure to do so could result
in serious accidents due to continuous use of the
malfunctioning product.
Prohibition
Do not make any modifications such as
drilling holes to the control panel (electric
parts box). Drill fragments, iron filings, etc. created
by such modifications may attach to parts and cause
fires or malfunction.
Install the product at an altitude of 1000m
or lower. If the product must be installed at a location
of an altitude above 1000m, consult the place of
purchase.
Apply sealing agent to the screws on the
pipe to prevent water leakage. Failure to do
so may cause water to leak.
If a device with rapid change of flow rate
such as a flash valve is used, consult the
place of purchase in advance. When the flash
valve is used while the pump is stopped, the pressure
inside of the pipe rapidly decreases, causing pressure
change or air mixture.
If there is a risk of freezing during winter,
prevent freezing by using insulation or a
heater. Failure to do so may result in damage from
freezing.
Tidy up the surrounding environment
before starting the installation, inspection,
or other operation. Failure to do so could result in
injury by slipping and tumbling.
Prepare the suction pipes for each pump.
Avoid right angled loops and set the
pipes as short as possible and with as
few bent as possible with a rising slope
(1/100 or more). Otherwise, the pump may not
work properly.
Prohibition
Do not use the pump outside of the
range of total suction head specification.
Otherwise, the pump may not work properly.
Confirm that no debris or foreign objects
are clogging the strainer of the suction
intake before operating the pump. Negative
pressure will be created on the suction side and cause
malfunction or result in damage.
Prevent air from accumulating in the
pipes. Failure to do so may cause abnormal operation
of the pump.
Prohibition
Do not directly connect the commercial
power supply to the motor. Otherwise, fire,
malfunction, or breakage may be caused.
Before installing the pump, be sure to
clean the well. Remove foreign objects
such as sand from inside and outside
of the pipes. When foreign object such as sand is
sucked, pumping may become not possible due to sand
bite.
Water level of the well changes. Be
careful with the operating water level.
When the water level lowers, the pump may suck air in,
causing idling.
Prohibition
Do not cover your head with the plastic
bag used for packing of the product.
Otherwise, suffocation may be caused.
CAUTION

14 For construction shops
Installation and preparation (for construction shops)
Electrical work
Prohibition
Do not feed the power cable and control
cable in one pipe or duct. Erroneous operation
of the product or other equipment may be caused.
If the outlet has to be prepared outside
under unavoidable situation, use water-
proof outlet. Failure to do so could result in short
circuit, electric shock, or fire.
Prohibition
Do not scratch, damage, process, forcibly
bend, pull, twist, bundle, or pinch the
power cable. Do not put a heavy object
on the power cable. Otherwise, the cable breaks,
and fire or electric shock may be caused.
Operation and trial operation
Prohibition
Do not use this product in a range
outside the rated voltage. Failure to observe
this could result in fire or electric shock.
Check that the rotating direction is right.
If rotated in the wrong direction, impeller nuts or bolts
may get loose and cause an accident.
Prohibition
Caution for
rotating parts
Do not insert
fingers in
rotating parts
Do not touch rotating parts or insert
fingers or objects in the opening during
operation. Failure to observe this could result in
electric shock, damage, or personal injury.
Do not touch
Very hot:
do not touch
Do not touch the pump, motor, and heater
during or immediately after operation.
These parts can be very hot and cause burns.
Prohibition
Do not idle or perform shut off operation
of a certain period of time. In addition, do
not allow mixing of air into the handling
fluid. Otherwise, casing, bearing, shaft seal may get
damaged, or pumping becomes unavailable. In addition,
the pump may get overheated, causing a burn.
Check that the pump and pipes are filled
with water. Lack of water may result in fire or
disconnection of the heater.
Prohibition
Do not operate a 50Hz-specified pump in
60Hz. Otherwise, a breakage due to an excessive
pressure or motor burnout due to overload may be
caused.
Do not operate a 60Hz-specified pump in
50Hz. The pump performance may be degraded.
Use valves in the designated condition.
Otherwise, the product cannot be operated properly,
causing damages in the units.
Prohibition
Do not place flammable objects around
the pump, cable, or in the pump cover. Or
do not cover these parts with a flammable
object. Flammable objects may get overheated,
causing a start of fire.
At startup of the operation after long-
time storage or a recess, perform a trial
operation by following the "installation"
and "operation" procedures in a specified
order. There are possibilities of pump constraint by
seizure, motor burnout, or idling by water drainage.
Operate the pump within the specification
range. Failure to do so may cause pump damage or
accident.
At the time of trial operation, remove air
in the product and pipes thoroughly. Failure
to do so may cause air lock of the pump, temperature
increase, causing breakdown or accident.
At the time of priming and exhaust, avoid
splashing of water over the product.
Otherwise, short circuit, electric shock, fire, or
malfunction may be caused.
Prohibition
Do not allow the pump to suck in sand or
foreign objects. Failure to observe this could result
in the failure of the pump to start or operate normally.
Inspection/Maintenance
When the product is not used during
winter time, turn off the power and drain
water from the pump and pipes. When the
product is left with water inside of the pump and pipes,
the pump may get damaged due to congelation of the
pump.
Before starting disassembly or
inspection, check that the internal
pressure is zero. Failure to do so could result in
spouting of water causing accident and injury.
When measuring the insulation
resistance, use an insulation resistance
meter (250V or lower) that matches to the
power voltage. Otherwise, the electric parts box,
etc. may get broken.
Prohibition
When the pump is hot, do not remove the
plug (priming cup/exhaust outlet). Failure to
observe this could result in spouting of boiling water and
causing a burn.
When the pump is not used for a long
time, drain water from the pump and
pipes. Otherwise, accumulated water may get rotten,
and bacteria may be increased.
CAUTION

15
For construction shops
Installation and preparation (for construction shops)
Operating principle
When turning on the faucet, the water pressure inside this product (pump) decreases. When the built-in
fine sensor
(
*
1)
detects a pressure failure, the pump operates automatically to set the water pressure back
to the prescribed level. When the water supply reduces to less than approximately 4 liters/min by turning
off the tap, the fine sensor detects it and the pump stops automatically. (The pump may not stop soon
because of the timer function. This is not a failure.)
(*1) The sensor that has the pressure transmitter and flow switch necessary for the automatic operation of the pump in
one unit
Inspection/Maintenance
To use the product safely for a long time,
conduction of both periodical and daily
inspections are recommended. Failure to do
so may cause breakage of pump and accident. For the
periodical inspection, consult the place of purchase.
Periodically check the performance of
protective relay. The product does not operate
properly at the time of accident, causing electric shock
or malfunction.
Replace the consumables periodically.
When the consumables are continuously used in
deteriorated and worn-out condition, accidents such
as water leak, seizure, and breakage may be caused.
For the periodical inspection and replacement of parts,
consult the place of purchase.
When the pressure gauge or the
compound gauge is used, keep the cock
closed while the gauge is not used for
measurement. If the cock is kept opened all the
time, the pressure gauge or the compound gauge may
get broken.
Be sure to perform the inspection by
following the inspection items. Otherwise,
generation of malfunction cannot be prevented in
advance, causing accidents.
CAUTION

16 For construction shops
Installation and preparation (for construction shops)
Installation and piping
Selecting the installation site
Select sites like those described below for installing the product.
●A location that is not directly influenced by wind and rain from typhoons, etc.
●A location that is well-ventilated, cool and not exposed to rain and direct light.
●A location where the temperature around the pump is lower than 40°C.
●A location that is as close to the water supply source and as low as possible.
●A location where at least 30 cm space can be secured around and above the product for inspection and
repair.
●A level surface
Precaution for installation
●Install the pump horizontally, and secure it with foundation bolts.
Purchase foundation bolts separately.
Select a bolt size that is sufficiently longer than M8 x base thickness (58mm). (2 bolts)
●Do not overtighten the foundation bolts. Overtightening may result in deforming or damaging the resin base.
Measures against cold
●This pump incorporates a heater that keep it warm automatically at low temperature. However, this
antifreezing mechanism is insufficient in an area where ambient temperature is extremely low (0°C or less).
Prepare a shed etc. for the pump, and install the pump inside.
●To prevent congelation, wrap the pipes with lagging material or install pipes belowground.
●When the power is turned off, the antifreezing mechanism does not operate. In a cold region, do not turn off
the power until water is removed even if this product is not used for a long time.
Caution
Carry out thorough measures against congelation. Kawamoto Pump assumes no responsibility for breakage
caused by congelation.
Do not install the pump at a location without a water drainage treatment and a water-proof treatment.
Otherwise, when the water leaks, serious damage may be caused.
* Damages occurred due to a facility without water drain and water preventive treatments are not
within the responsibility of Kawamoto Pump.
Install the product at an altitude of 1000m or lower. If the product must be installed at a location of
an altitude above 1000m, consult the place of purchase.
CAUTION
Do not place flammable objects around the pump, cable, or in the pump cover. Or do
not cover these parts with a flammable object. Flammable objects may get overheated,
causing a start of fire.
CAUTION
Warning to fire
Prohibition
Prohibition

17
For construction shops
Installation and preparation (for construction shops)
Installation
Install the product while observing the following items.
When using the product to suck in water from a well
●
Set up the product so that the total suction head is
within 8m.
The total suction head must be a sum of the
suction height and the piping-loss height of
horizontal pulling etc. depending on the type of
pipe used.
●The water level drops in low-water season. The
total suction head should be based on the time of
low water.
●The depth of submersion under water must be
at least 10 times the pipe diameter while being
careful not to suck air in.
●The depth to the bottom of the well must be 30cm
or more.
●Attach a strainer to the end of suction pipe.
●When the pump could suck in foreign objects,
sand, etc., install a sand filter (special accessory)
to the suction pipe.
●Do not install a sand filter to the discharge pipe.
211
2
At least
30 cm
Drainage ditch
Total suction
head
Within 8m
Submersion depth
10 times or more of the pipe diameter
At least 30 cm
Strainer
Pipe support
Sand filter
(special accessory)
When sucking in water from a water tank
●
Set up the product so that the total suction head is
within 2m.
●The depth of submersion under water must be at
least twice the pipe diameter.
●The depth to the bottom of the water tank must be
at least twice the pipe diameter.
●The settings of the
pump sensor before shipment
are all set to “
starting suction head for well water.”
Please adjust the sensor. (See page 22.)
●Purchase the water tank accessory set (special
accessory) separately.
At least
30 cm
Total suction head
Within 2m
At least twice
the pipe diameter
When pouring water from a water
tank
●Set up the product so that the pour head is within
5m.
●Install a sluice valve near the suction opening for
maintenance.
●The settings of the pump sensor before shipment
are all set to “ starting suction head for well water.”
Please adjust the sensor. (See page 22.)
At least
30 cm
Drainage ditch
Pour head
Within 5m
Pipe support
Sluice valve
BT027
BT028
BT029

18 For construction shops
Installation and preparation (for construction shops)
Piping
Notes on piping
●Remove the flanges before piping work.
●Make the pipes as short as possible, and
minimize bending parts.
●Use pipes appropriate for respective types. If the
pipe diameter is shorter than the regulation size, it
may cause low water volume or disable pumping.
●Install a sluice valve near the discharge opening
for maintenance.
●Install pipe supports so that the pipe weight is not
directly applied to the pump.
●Fasten the pipe joints completely to prevent air
suction, water leakage, etc.
●Incline the suction pipes to prevent air from
accumulating in the pipes. Avoid right angled
loops and set the pipes with a rising slope (1/100
or more).
Type
NR255-F2
NR256-F2
Pipe diameter
25mm
Pipe specificatios
BT030
Apply sealing agent to the screws on the pipe, so the water leak can be prevented surely. Failure to
do so may cause water leak.
CAUTION

19
For construction shops
Installation and preparation (for construction shops)
Grounding
1Connect a ground wire to the connector (earth
terminal: M4) on the base.
(Eartn terminal: M4)
Connector
Ground plate
Soldering
Ground bar
30cm
or more
2Connect a ground plate of 30cm square or more
or a ground bar of 1cm or more in diameter
and 40cm or more in length to a ground wire by
soldering, and bury it in the wet ground to the
depth of 30cm or more.
Caution
Be careful not to damage a pipe etc. when
burying the ground bar.
About a sterilization device
●If you need a sterilization device, contact the place of purchase.
●When using a sterilization device of a third party, purchase the control unit, DMS4 (special accessory). (Some
models are not available.)
Turning on the pump
Turn on the power and confirm that the source lamp
lights up red.
Caution
Before turning on the power, check that the cords
are correctly connected, and that the connectors (1
to 3 in the illustration) are not loose.
SOURCE TROUBLE
RESET
SENSOR
MOTOR
FLOAT
1
2
3
Source lamp
BT031
BT032
Electrical work
Electrical work must be performed by a professional engineer. Improper wiring and connection
could result in malfunction, short circuit, electric shock, and fire.
WARNING

20 For construction shops
Installation and preparation (for construction shops)
Trial operation
Do not allow the pump to suck in sand or foreign objects. Failure to observe this could result in the
failure of the pump to start or operate normally.
Check that the rotating direction is right. If rotated in the wrong direction, impeller nuts or bolts may
get loose and cause an accident.
Do not touch rotating parts or insert fingers or objects in the opening during
operation. Failure to observe this could result in electric shock, damage, or
personal injury.
Do not touch the pump, motor, and heater during or immediately after operation. These
parts can be very hot and cause burns.
When connecting or disconnecting the wiring, always shut down the power before you start
operating. Failure to do so could result in electric shock.
After the power is turned on or while the power is on, do not touch the charging part of the control
panel (electric parts box), motor terminals, and cable ends. Otherwise, short circuit, electric shock,
or fire may be caused.
WARNING
CAUTION
Caution for
rotating parts
Do not insert
fingers in
rotating parts
Do not touch
Do not touch Very hot:
do not touch
Warning to
electric shock
Prohibition
Prohibition
Prohibition