IWAKI PUMPS NRD Series User manual

Safety instructions
Overview Installation Operation Maintenance Specication
© 2014 IWAKI CO.,LTD.
Iwaki Direct Drive Pump
NRD Series (built-in type)
Instruction manual
Thank you for choosing our product.
Please read through this instruction manual before use.
This instruction manual describes important precautions and
instructions for the product. Always keep it on hand for quick
reference.
http://www.iwakipumps.jp
IWAKI CO.,LTD. 6-6 Kanda-Sudacho 2-chome Chiyoda-ku Tokyo 101-8558 Japan
TEL: [phone] FAX: [phone]
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T874-1 '16/10

2
Order conrmation
Open the package and check that the product conforms to your order. If
any problem or inconsistency is found, immediately contact your distribu-
tor.
a. Check if the delivery is correct.
Check the nameplate to see if the
information such as model codes, dis-
charge capacity, discharge pressure
are as ordered.
b. Check if the delivery is damaged or deformed.
Check for transit damage and loose bolts.
Order conrmation

3
Contents
Contents
Order conrmation ............................................................................................. 2
Safety instructions .......................................................................5
WARNING.......................................................................................................... 6
CAUTION........................................................................................................... 7
Precautions for use ......................................................................................... 9
Overview...................................................................................... 11
Introduction.....................................................................................................11
Pump structure & Operating principle .........................................................11
Part names.......................................................................................................12
Limitations.......................................................................................................12
Before operation ..........................................................................................12
Priming.........................................................................................................13
Liquid to be handled ....................................................................................13
ON-OFF operation.......................................................................................13
Identication codes........................................................................................14
Installation ..................................................................................15
Pump mounting...............................................................................................15
Pipework ..........................................................................................................16
Plumbing layout ...........................................................................................16
Discharge & Suction valves ...................................................................17
Pressure gauge ......................................................................................17
Drain valve..............................................................................................17
Plumbing......................................................................................................17
Plumbing precautions ..................................................................................19
Suction line.............................................................................................19
Discharge line........................................................................................ 20
Wiring.............................................................................................................. 20
Power & External signal cables.................................................................. 20
Before wiring ......................................................................................... 20

4Contents
Rated current & Starting current ............................................................21
Wiring examples ......................................................................................... 22
Specication (connector)....................................................................... 22
Wiring diagram (option cable) ............................................................... 23
Wiring diagram (with no 1-5VDC signal generator) .............................. 23
Operation.....................................................................................24
Before operation............................................................................................ 24
Start-up........................................................................................................24
Shutdown.................................................................................................... 25
Maintenance................................................................................26
Troubleshooting............................................................................................. 26
Retightening of pump head xing screws................................................... 27
Drainage.......................................................................................................... 28
Blowdown ................................................................................................... 28
Inspection....................................................................................................... 30
Daily inspection .......................................................................................... 30
Specication/Outer dimension .....................................................................31
Specication ................................................................................................31
Wet ends..................................................................................................... 32
NRD-05/-08/-12/-20/-30 ........................................................................ 32
Outer dimensions........................................................................................ 33
NRD-05/-08 with sideways-mounted base ........................................... 33
NRD-08 custom type ............................................................................ 34
NRD-12.................................................................................................. 35
NRD-20/-30 ........................................................................................... 36
Performance curves ....................................................................................37
NRD-05 ..................................................................................................37
NRD-08..................................................................................................37
NRD-12.................................................................................................. 38
NRD-20 ................................................................................................. 38
NRD-30................................................................................................. 39

5
Safety instructions
Keep fire away
Safety instructions
Read through this section before use. This section describes
important information for you to prevent personal injury or
property damage.
■ Symbols
In this instruction manual, the degree of risk caused by incorrect use is noted
with the following symbols. Please pay attention to the information associated
with the symbols.
Indicates mishandling could lead to a fatal or
serious accident.
WARNING
A symbol accompanies each precaution, suggesting the use of "Caution", "Pro-
hibited actions" or specic "Requirements".
Indicates mishandling could lead to personal
injury or property damage.
CAUTION
Caution marks Prohibited mark Requirement mark
Electrical
shock
Caution Requirement
Export Restrictions
Technical information contained in this instruction manual might be treated
as controlled technology in your countries, due to agreements in international
regime for export control.
Please be reminded that export license/permission could be required when this
manual is provided, due to export control regulations of your country.
Prohibited Do not rework
or alter Wear
protection

6WARNING
Turn off power before service
Risk of electrical shock. Be sure to turn off power to stop the pump
and related devices before service is performed.
Stop operation
If you notice any abnormal or dangerous conditions, suspend op-
eration immediately and inspect/solve problems.
Do not use the pump in any condition other than its intended purpose
The use of the pump in any conditions other than those clearly
specied may result in failure or injury. Use this product in specied
conditions only.
Do not modify the pump
Alterations to the pump carries a high degree of risk. It is not the
manufacturer's responsibility for any failure or injury resulting from
alterations to the pump.
Wear protective clothing
Always wear protective clothing such as an eye protection, chemical
resistant gloves, a mask and a face shield during disassembly, assem-
bly or maintenance work. The specic solution will dictate the degree
of protection. Refer to MSDS precautions from the solution supplier.
Use of hazardous chemicals
Risk of personal injury or re. Check/monitor plumbing system for a
leak before or in operation when handling a ammable, corrosive or
harmful liquid.
Do not damage the power cable
Do not pull, knot, or crush the power cable. Damage to the power
cable could lead to a re or electrical shock if cut or broken.
Do not operate the pump in a ammable atmosphere
Do not place explosive or ammable material near the pump.
WARNING
Requirement
Wear
protectors
Caution
Requirement
Keep fire away
Prohibited
Do not rework
or alter
Prohibited

7
Safety instructions
CAUTION
Qualied personnel only
The pump should be handled or operated by qualied personnel with a
full understanding of the pump. Any person not familiar with the prod-
uct should not take part in the operation or maintenance of the pump.
Use specied power only
Do not apply power other than that specied on the nameplate.
Otherwise, failure or re may result. Ensure the pump is properly
grounded.
Do not run pump dry
Running the pump without liquid, friction heat builds up and dam-
ages the internal parts of pump.
Ventilation
Fumes or vapors can be hazardous with certain solutions. Ensure
proper ventilation at the operation site.
Do not install/store the pump:
• Where ambient temperature can exceed 0-50ºC (32-125ºF).
• In a flammable atmosphere or in a dusty/humid environment.
• In direct sunlight or wind & rain.
• In mechanical vibration.
• In a corrosive atmosphere such as chlorine gas.
Spill precautions
Ensure protection and containment of solution in the event of
plumbing or pump damage (secondary containment).
Do not stand on the pump
Personal injury may result as the pump turns over.
Do not touch the pump or pipe with bare hands
Risk of burning. The surface temperature of the pump or pipe rises
high along with liquid temperature in or right after operation.
CAUTION
Requirement
Requirement
Requirement
Requirement
Caution
Prohibited
Prohibited
Prohibited

8CAUTION
Keep electric parts and wiring dry
Risk of re or electric shock. Install the pump where it can be kept dry.
Keep away from around the pump when turning ON power
The pump doesn't have an ON-OFF switch and starts as the power
cable is plugged in with 1-5VDC control voltage provided.
Remove foreign matters
Turn off power and clean the pump if foreign matters enter the
pump. Otherwise, the pump may be damaged.
Static electricity
When low electric conductivity liquids such as ultra-pure water and
fluor inactive liquid (e.g. FluorinertTM) are handled, static electricity
may generate in the pump and may cause static discharge. Take
countermeasures to remove static electricity.
Check pump head bolts
Liquid may leak if any of pump head bolts become loose. Tighten the
bolts diagonally and evenly by 1.6N•m before initial operation and at
regular intervals.
Do not use the pump in a wet location
The pump is not waterproof. Use of the pump in wet or extremely
humid locations could lead to electric shock or short circuit.
Do no use a damaged pump
Using a damaged pump could lead to an electric shock or death.
Disposal of the used pump
Dispose of any used or damaged pump in accordance with local
rules and regulations. If necessary, consult a licensed industrial
waste disposal company.
Do not pressurize the pump
If the pump is pressurized over the maximum discharge pressure, O
ring seal may be impaired and leakage may result.
Requirement
Requirement
Caution
Requirement
Requirement
Prohibited
Prohibited
Prohibited
Prohibited

9
Safety instructions
Precautions for use
• Electrical work should be performed by a qualified electri-
cian. Otherwise, personal injury or property damage could
result.
• Do not install the pump:
–In a ammable/corrosive/explosive atmosphere.
–In a dusty place.
–In direct sunlight or wind & rain.
–In mechanical vibration.
– Where ambient temperature can exceed 0-50ºC (32-
125ºF).
–Where ambient humidity can exceed 30-85RH.
• Allow sufcient space around the pump for easy access
and maintenance.
• Use care handling the pump. Do not drop. An impact may
affect pump performance. Do not use a pump that has
been damaged to avoid the risk of electrical damage or
shock.
• This pump is not capable of self-priming. Always prime
the pump before operation.
Precautions for use
Caution
Requirement

10 Precautions for use
• The pump is not waterproof. Do not operate the pump while
wet with solution or water. Failure or injury may result. Im-
mediately dry off the pump if it gets wet.
• Do not close discharge line during operation. Solution may
leak or piping may break.
• Solution in the discharge line may be under pressure.
Release the pressure from the discharge line before dis-
connecting plumbing or disassembly of the pump to avoid
solution spray.
• Wear protective clothing when handling or working with
pumps. Consult solution MSDS for appropriate precautions.
Do not come into contact with residual solution.
• Do not clean the pump or nameplate with a solvent such
as benzine or thinner. This may discolour the pump or
erase printing. Use a dry or damp cloth or a neutral
detergent.
Caution
Caution
Caution
Requirement
Benzine
Kerosene

11
Overview
Introduction
Pump characteristics, features and part names are described
in this section.
Introduction
Pump structure & Operating principle
The NRD pump is a canned motor pump with a brushless DC motor.
The magnetic force of the motor rotates the driven magnet in order for the
impeller to revolve in the pump chamber, where a liquid is transferred from the
inlet to outlet.
Overview
Outlet
Impeller
Driven magnet
Inlet
Motor

12 Part names
Limitations
Before operation
Water hammer phenomenon may occur when starting or stopping operation,
especially when a discharge line is too long.
When starting operation:
First prime the pump and close a discharge valve. Run the pump and then
start to open the valve to meet a duty point slowly.
When stopping operation:
Slowly close a discharge valve until it bottoms out. Then turn off power to stop
the pump.
*Do not close a discharge line sharply, or water hammer phenomenon may occur and
damage the pump with impact pressure.
Part names
Outlet
Base
Always fix with screws.
Specification label
Use the pump according to
the specifications on the label.
Pump head
Not capable of self-priming. Always
prime the pump before operation.
Inlet

13
Overview
Limitations
Priming
This pump is not capable of self-priming. Always prime the pump before opera-
tion. Running the pump without priming water, internal parts are excessively
worn by friction heat and fatal pump damage results.
Liquid to be handled
Do not use the following liquids.
• Fluids which inflate polypropylene
• Paraffinic hydrocarbons such as gasoline and kerosene
• Halogenated hydrocarbons such as trichloroethylene and carbon tetrachloride
• Ether and low-grade ester
• Slurry (never use slurry, which wears out the pump bearings.)
• Magnetic fluid
• Explosive or flammable liquid
A strong magnet is inside the pump.
Do not use the pump with any liquid which contains
metals such as iron and nickel.
Observe the viscosity limit of 1mPa•s.
(at SG of 1.07 for the NRD-05/-08/-12 and 1.0 for the NRD-20/-30)
Pure water may bring poor lubrication to the bearing. Contact us in advance.
Effect of temperature change
Viscosity, vapour pressure or corrosiveness changes with liquid temperature.
Observe the allowable ranges of ambient/liquid temperatures on page 31.
ON-OFF operation
Do not turn on or off the pump 2 times or more per minute and observe the al-
lowable shortest ON or OFF time of 15sec.
Iron
Nickel

14 Identication codes
Identication codes
The model code represents the following information.
NRD - 05 T V 24 - R S
a b c d e f g
a. Series name
NRD
b. Pump size
05/ 08/ 12/ 20/ 30
c. Bearing material
T: Filled PTFE (NRD-05/-08/-12/-20/-30)
d. O ring material
V: FKM
E: EPDM
e. Power voltage
24: 24VDC
f. Connection
No code: Tube
R: R thread
N: NPT thread
g. Base
No code: Sideways-mounted
S: Custom type

15
Installation
Pump mounting
1
2
Installation
Installation of the pump, tubing and wiring are described in
this section.
Observe the following points
• Risk of electrical shock. Be sure to turn off power to stop the pump and
related devices before service is performed.
• If you notice any abnormal or dangerous conditions, suspend operation
immediately and inspect/solve problems.
• Do not place explosive or flammable material near the pump.
• Use of a damaged pump could lead to an electric shock or death.
• A strong magnet is inside the pump. Do not bring a watch or magnetic
device which may be adversely affected by a magnetic force.
Pump mounting
Select a suitable place.
Allow sufficient space around the pump for easy access and maintenance.
•Select a level location, free from vibration, that won't hold liquid. If the
pump is not installed level, output may be affected.
• Keep good ventilation, taking account of the self-heating of pump.
Mounting position
This pump is not capable of self-priming
and should be installed lower than the sup-
ply tank liquid level. Always keep a liquid
level 30cm higher than the outlet of the
tank, or air may enter a suction line and
bearings may be worn badly.
Anchor the pump.
Anchor the pump with four bolts so it doesn't vibrate.
See page 33, 34 & 35 for suitable bolt size.
NOTE
Do not mount the pump in a vertical direction.
3
30cm
or more

16 Pipework
Pipework
Connect tubes to the pump and install a check valve.
Precautions
• Using a high ow pump and a small supply tank, a liquid level in the tank
changes greatly.
• Do not allow a drop of adhesive agent or sealant into pipework. They may
cause fatal damage to the pump.
• If pipework directory weighs on the pump, deformation or damage may
result. Be sure to install pipe supports.
• Air may be entrained into a suction line when a supply tank is refilled dur-
ing operation. Take any action to prevent air ingress such as installing a
baffle.
• Make sure every joint in plumbing is securely sealed.
• Use a corrosion-/pressure-resistant vinyl tube such
as a braided and a teflon tube, otherwise a suction
tube can be crushed by negative pressure (espe-
cially for hot liquid).
Plumbing layout
Discharge pressure
monitoring gauge
Three way joint
Pipe support
Check valve
(Backflow prevention)
Discharge valve
(Shout off valve)
Flooded suction
Air vent valve
Drain valve
Air vent line
Pipe support
Suction valve (Shut off valve)

17
Installation
■ Discharge & Suction valves
Install a ball valve on a discharge line for the adjustment
of a ow rate/delivery head or shutting off a ow, and
on a suction line for the convenience of maintenance or
shutting off a ow, as close to the pump as possible.
■ Pressure gauge
Install a pressure gauge for monitoring discharge line pressure.
■ Drain valve
Install a drain valve in between the pump inlet and a suction valve for blowing
down liquid.
Plumbing
Tube
Cut the tube end flat.
Select a tube in accordance with the inlet and outlet of the
pump. Connection will not be secured if a different size
tube is used.
Connect tube into the pump inlet.
First slide an applicable screw/band tube clamp onto a
tube. Then push a tube end into an inlet or outlet until
it bottoms out.
Clamp down connection.
Be sure to secure the tube connection with a
clamp to eliminate the possibility of leakage.
NOTE
• The pump inlet and outlet are plastics. Do not use excessive force.
• Always use a screw/band tube clamp. Do not use wire clamp.
Pipework
1
2
3
Clamp
Tube

18 Pipework
Pipe
Connect to plastic thread pipe.
The inlet and outlet of the pump are made of plastics. They must be
connected to plastic thread pipes. Using metal pipes, these plastics
parts will break.
Apply thread sealing tape.
Wrap a sealing tape two to three turns to the inlet and outlet of the
pump. Do not wrap too many times unnecessarily, otherwise the con-
nection may break.
NOTE
Do not use a liquid sealant. A liquid sealant can deteriorate the plastic connection.
Plumb the pump.
Excessive force may be applied to the connection point between the pump
head and the motor. Always hold the pump head while screwing in pipes.
Avoid holding the motor unit.
Also, observe the rated maximum tightening torque of pipes to the pump
inlet and outlet.
Model Inlet Outlet
NRD-05/-08 4.0N•m 2.0N•m
NRD-12/-20/-30 6.0N•m 6.0N•m
1
2
3

19
Installation
Plumbing precautions
■ Suction line
• In order to minimize plumbing resistance, have plumbing shortest with the mini-
mum bends. Note cavitation* tends to occur when plumbing length is too long.
• A liquid level should be at least 30cm higher than the tank outlet for the pre-
vention of air ingress.
• Keep liquid in a supply tank free from foreign matters. Clean the tank at intervals.
• Avoid any loops in a plumbing run that could form a vapour trap. A suction
line should be laid on a rising gradient of 1/100 toward the pump so as to
expel air easily.
• Be sure to secure connections on a suction line for the prevention of entrained
air. The presence of air in a suction line may prevent liquid delivery.
• Do not use a suction tube, pipe or coupler with a smaller I.D. than the pump inlet.
Suction line examples
Acceptable Unacceptable
Pipework
Cavitation
Air bubbles caused by a negative pressure in the pump unit, accompanied with
vibration and noise. Performance deterioration or part corrosion results.
Glossary
Ascending gradient Descending gradient
U-shaped piping Arched piping
Air trap
Flooded suction Suction lift

20
■ Discharge line
• Use measures to keep the pump connections free from stress. Weight and
thermal expansion/contraction of the piping can stress connection points.
• The longer the plumbing length, the more pipe resistance. If the plumbing
length is long, widen the pipe I.D. accordingly to reduce the pipe resistance
and ensure the rated pump performance is kept.
• Liquid in the pump and plumbing may freeze and consequently cause dam-
age at a freezing temperature. Drain or flush the pump and plumbing before
leaving them for a long period.
Wiring
Wiring for power source, earthing and external signal.
Observe the following points
• Electrical work should be performed by a qualified electrician. Conform
to local electric codes.
• Risk of electrical shock. Be sure to turn off power to stop the pump and
related devices before service is performed. Or an electrical shock or
short circuit may result.
• Be careful for power not to be turned on during work.
Power & External signal cables
■Before wiring
• Check that the main power is turned off.
• Electrical work should be performed in accordance with local electric codes,
with an appropriate wire gauge or so.
• Apply the rated power voltage. See the spec label.
• The pump doesn't have an ON-OFF switch. The pump starts as a power
cable is plugged in. Do not turn ON and OFF power in a short time.
• When an external fuse is used and it has blown, always solve the root cause
of blowout. Be sure to unplug the pump before investigation. If the fuse blows
frequently, the starting current may be a root cause.
• Check power voltage has reduced to 0V before turning on power, especially
right after operation. Otherwise, the pump may not start to run.
Wiring