IWAKI PUMPS EWN-R User manual

2008 IWAKI CO., LTD.
Iwaki
Electromagnetic Metering Pump
EWN-R (Standard)
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.
Safety instructions
Outline Installation Operation Maintenance Specication
T683 '08/12
( )Country codes
IWAKI CO.,LTD. 6-6 Kanda-Sudacho 2-chome Chiyoda-ku Tokyo 101-8558 Japan
TEL:[phone] FAX:[phone](http://www.iwakipumps.jp)
Australia IWAKI Pumps Australia Pty. Ltd. TEL : [phone] FAX : [phone] Korea IWAKI Korea Co.,Ltd. TEL : [phone] FAX : [phone]
Austria IWAKI (Austria) GmbH TEL : [phone] FAX : [phone] Malaysia IWAKIm Sdn. Bhd. TEL : [phone] FAX : [phone]
Belgium IWAKI Belgium n.v. TEL : [phone] FAX : 1367 2030 Norway IWAKI Norge AS TEL : [phone] FAX : [phone]
China IWAKI Pumps (Shanghai) Co., Ltd. TEL : [phone] FAX : [phone] Philippines IWAKI Chemical Pumps Philippines, Inc. TEL : [phone] FAX : [phone]
China IWAKI Pumps (Guandong) Co., Ltd. TEL : [phone] FAX : [phone] Singapore IWAKI Singapore Pte. Ltd. TEL : [phone] FAX : [phone]
China GFTZ IWAKI Engineering & Trading (Guangzhou) TEL : [phone] FAX : [phone] Spain IWAKI Iberica Pumps, S.A. TEL : [phone] FAX : [phone]
China GFTZ IWAKI Engineering & Trading (Beijing) TEL : [phone] FAX : [phone] Sweden IWAKI Sverige AB TEL : [phone] FAX : [phone]
Denmark IWAKI Nordic A/S TEL : [phone] FAX : [phone] Switzerland IWAKI (Schweiz) AG TEL : [phone] FAX : [phone]
Finland IWAKI Suomi Oy TEL : [phone] FAX : [phone] Taiwan IWAKI Pumps Taiwan Co., Ltd. TEL : [phone] FAX : [phone]
France IWAKI France S.A. TEL : [phone] FAX : [phone] Taiwan IWAKI Pumps Taiwan (Hsin-chu) Co., Ltd. TEL : [phone] FAX : [phone]
Germany IWAKI EUROPE GmbH TEL : [phone] FAX : [phone] Thailand IWAKI (Thailand) Co.,Ltd. TEL : [phone] FAX : [phone]
Holland IWAKI Holland B.V. TEL : [phone] FAX : [phone] U.K. IWAKI PUMPS (UK) LTD. TEL : [phone] FAX : [phone]
Hong Kong IWAKI Pumps Co., Ltd. TEL : [phone] FAX : [phone] U.S.A. IWAKI America Incorporated TEL : [phone] FAX : [phone]
Indonesia IWAKI Singapore (Indonesia Branch) TEL : [phone] FAX : [phone] Vietnam IWAKI Pumps Vietnam Joint Venture Co.,Ltd. TEL : [phone] FAX : [phone]
Italy IWAKI Italia S.R.L. TEL : [phone] FAX : [phone]

2
Order conrmation
Order conrmation
After unpacking, check the following points. Contact us or your nearest
dealer if the delivery is imperfect.
a. Check if the delivery is as per order.
Check the nameplate to see if the dis-
charge capacity, discharge pressure
and voltage are as per order.
b. Check if the delivery is damaged or deformed.
Check for transit damage and loose bolts.

3
Contents
Contents
Order conrmation ............................................................................................. 2
Safety instructions ....................................................................... 6
Warning............................................................................................................. 7
Caution.............................................................................................................. 8
Precautions for use ........................................................................................10
Outline ......................................................................................... 12
Introduction.....................................................................................................12
Pump structure & Operating principle .........................................................12
Features.......................................................................................................13
Operational function ....................................................................................13
Part names.......................................................................................................18
Pump............................................................................................................18
Operational panel ........................................................................................19
Basic displays & Pump states ............................................................... 20
Identication codes....................................................................................... 22
Pump/Drive units ........................................................................................ 22
Installation .................................................................................. 24
Pump mounting.............................................................................................. 24
Pipework ......................................................................................................... 25
Tube connection ......................................................................................... 25
Check valve mounting ................................................................................ 27
Wiring.............................................................................................................. 29
Power supply/Earthing................................................................................ 29
External input cable .....................................................................................31
Connections .......................................................................................... 33

4
Contents
Operation ........................................................................................................ 36
Before operation ............................................................................................ 36
Points to be checked .................................................................................. 36
Retightening of pump head xing bolts ...................................................... 36
Degassing....................................................................................................37
Flow rate adjustment .................................................................................. 40
Stroke rate adjustment ...........................................................................41
Stroke length adjustment....................................................................... 43
Before a long period of stoppage (One month or more)............................. 44
Operation programming ............................................................................... 45
Programming ow....................................................................................... 46
Manual operation........................................................................................ 48
EXT operation............................................................................................. 49
EXT mode ............................................................................................. 49
EXT mode programming....................................................................... 50
User mode .................................................................................................. 59
STOP/Pre-STOP function ..................................................................... 60
STOP/Pre-STOP function cancellation ................................................. 62
OUTPUT function.................................................................................. 64
ANA-V/-R selection ............................................................................... 66
Buffer ON/OFF selection....................................................................... 68
PIN number entry ...................................................................................70
Keypad lock .................................................................................................72
Keypad lock activation............................................................................73
Keypad lock release ...............................................................................73
Calibration mode .........................................................................................74
Unit change..................................................................................................75

5
Contents
Maintenance................................................................................ 76
Troubleshooting............................................................................................. 77
Inspection....................................................................................................... 79
Daily inspection ...........................................................................................79
Periodic inspection ......................................................................................79
Wear parts replacement................................................................................ 80
Wear parts list............................................................................................. 80
Before replacement .....................................................................................81
Valve set replacement .................................................................................81
Discharge valve set dismantlement/assembly .......................................81
Suction valve set dismantlemt/assembly .............................................. 83
Diaphragm replacement ............................................................................. 84
Exploded view................................................................................................ 87
Pump head, Drive unit & Control unit ..........................................................87
Pump head ................................................................................................. 88
EWN-[B09•B11•B16•B21•C16•C21] [VC•VH•PC•PH•TC] ..................... 88
EWN-[B31•C31•C36] [VC•VH•PC•PH•TC]............................................ 89
EWN- FC ........................................................................................... 90
EWN-C31PC/P6-V .................................................................................91
EWN- SH & SH-H................................................................................ 92
Specication/ Outer dimension ................................................................... 93
Specication ............................................................................................... 93
Pump unit .............................................................................................. 93
Power cable........................................................................................... 95
Pump colour .......................................................................................... 95
Outer dimensions........................................................................................ 96

6
Read through this section before use. This section describes
important information for you to prevent personal injury or
property damage.
■ Pictorial indication
In this instruction manual, the estimated risk of degree caused by incorrect use
is ranked with the following pictorial indications. First, fully understand informa-
tion on the pictorial indications.
Indicates mishandling could lead to a fatal or seri-
ous injury accident.
WARNING
Pictorial indication accompanies each precaution, suggesting "Caution", "Prohi-
bition" and "Requirement".
Indicates mishandling could lead to personal or
property damage.
CAUTION
Caution marks Prohibition mark Requirement mark
Safety instructions
Safety instructions
Prohibition
Electrical
shock
Caution
Do not remodel
Requirement
Wear
protectors
Earthing

7
Safety instructions
WARNING
Turn off power before work
Risk of electrical shock. Be sure to turn off power to stop the pump
and related devices before work.
Stop the operation
On sensing any abnormality or dangerous sign, suspend the opera-
tion immediately and inspect/solve problems.
Do not use the pump in anything other than a specied purpose
The use of the pump in any purpose other than those clearly speci-
ed may result in failure or injury. Use this product in a specied
condition.
Do not modify the pump
Remodelling the pump carries a high degree of risk. We are not
responsible for any failure or injury results from remodelling.
Wear protective clothing
Always wear protective clothing such as an eye protection, chemi-
cal resistant gloves, a mask and a work cap during dismantlement,
assembly or maintenance work.
Do not damage the power cable
Do not pull or knot the power cable or place a heavy stuff on it.
Damage to the power cable could lead to a re or electrical shock.
Do not use the pump in a ammable atmosphere
Do not place dangerous or ammable goods near the pump for your
safety.
WARNING
Prohibition
Requirement
Do not remodel
Wear
protectors
Electrical
shock
Prohibition
Prohibition

8
CAUTION
A qualied operator only
The pump must be handled or operated by a qualied person with a
full understanding of the pump. Any person who is not familiar with
this product should not take part in the operation or management.
Use a specied power only
Do not apply any power other than the one specied on the nameplate.
Otherwise, failure or re may result. Also, be sure to earth the pump.
Do not run pump dry
Do not run pump dry for more than 30 minutes (even when the
pump runs for degassing). Otherwise, the pump head xing screws
may loosen and liquid may leak. Optimize your system in order for
the pump not to run dry. If the pump run dry for a long period (for
more than 30 minute), the pump head and valve case may deform
by friction heat and consequently leakage results.
Do not wet electric parts or wiring
Risk of re or electrical shock. Install the pump free from liquid spill.
Observe an applicable MSDS
Take account of installation environment. Chemicals shall be con-
trolled in accordance with a MSDS.
Do not install or store the pump in the following places where...
• Under a ammable atmosphere or in a dusty/humid place.
• Ambient temperature is beyond 0-40 degrees Celsius.
• Under direct sunlight or wind & rain.
Countermeasure against efux
Take a protective measurement against an accidental chemical
overow results from pump or piping breakage.
CAUTION
Prohibition
Requirement
Prohibition
Prohibition
Caution
Caution
Requirement

9
Safety instructions
CAUTION
Do not use the pump in a water place
The pump is not totally waterproof. The use of the pump in water or
high humidity could lead to electrical shock or short circuit.
Earthing
Risk of electrical shock. Always earth the pump.
Install an earth leakage breaker
An electrical failure of the pump may adversely affect related de-
vices. Purchase and install an earth leakage breaker separately.
Wear part replacement
Follow instructions in this manual for wear part replacement. Do not
dismantle the pump beyond the extent of the instructions.
Do no use a damaged pump
Using a damaged controller could lead to an electric leak or shock.
Disposal of the used pump
Dispose of any used or damaged pump in accordance with relevant
regulations. Consult a licensed industrial waste products disposing
company.
Tighten the pump head
Liquid may leak if pump head xing bolts are loose. Tighten the
bolts diagonally and evenly before an initial operation. Also, periodi-
cally tighten the bolts for the prevention of leakage.
Tightening torque
EWN-B11•16•21, C16•21: 2.16 N•m EWN-B31, C31•36: 2.55 N•m
Solution compatibility
This pump has been evaluated for use with water only. The suitabil-
ity of this pump for use with liquids other than water, such as acid
and alkaline, is the responsibility of the user. For liquids other than
water, select the best-suited liquid end material combination using a
chemical compatibility chart.
Earthing
Prohibition
Requirement
Requirement
Caution
Prohibition
Caution
Caution

10
Precautions for use
• Electrical work shall be performed by a qualied opera-
tor. Otherwise, personal or property damage accident may
result.
• Do not install the pump in the following places where...
–Under a ammable atmosphere or in a dusty/humid place.
–Under direct sunlight or wind & rain.
–Ambient temperature is beyond 0-40 degrees Celsius.
Protect the pump with a cover when installing it out of
doors.
• Select a level location where is free from vibration and
liquid can't stay. Fix the pump with M5 bolts so as not to
vibrate. If the pump is installed at a tilt, the ow may reduce.
• When two or more pumps are installed, the pump opera-
tion interacts each other and vibration becomes signicant,
resulting in poor performance or failure of internal electri-
cal devices. Select an installation location where tolerates
vibration to enough degree.
• Keep a wide maintenance space around the pump.
• Install the pump as close to a supply tank.
• Install the pump in a cool and dark place when handling
liquids that readily generate gas bubbles such as sodium
hypochlorite or hydrazine solution. Flooded suction mount-
ing is strongly recommended when using the pump with a
supply tank.
Precautions for use
Caution
Caution
Caution
Caution
Caution

11
Safety instructions
• Be careful not to drop the pump onto the oor. A strong
impact may reduce pump performance. Do not use a pump
which has once damaged. Otherwise an electrical leak or
shock may result.
• The pump is a light water-/dust-proof structure of IP65, but
is not totally waterproof. Do not have the pump wet with the
liquid handled or rainwater.
• Never wet the pump head, control unit and drive unit. Oth-
erwise, Failure or an accident may result. Immediately wipe
off liquid if the pump has got wet.
• Do not close the discharge line during operation. Other-
wise, liquid may leak or tubing may break.
• Do not remove the control unit. Note that an applicable con-
trol unit differs with each drive unit. Do not attach a control
unit to a different drive unit. Otherwise, an electrical circuit or
the drive unit may fail.
• Release the pressure from the discharge line before disman-
tling the pump or removing tubing. Otherwise, chemical liquid
gushes out.
• Be careful not to come in contact with residual liquid.
• Do not clean the pump or nameplate with a solvent such
as benzene and thinner. This may discolour the pump or
erase printing. Use a dry cloth or a wet cloth with water
or neutral detergent.
Precautions for use
Caution
Caution
Caution
Caution
Caution
Requirement
Benzine
Thinner

12
Outline
Introduction
The information such as characteristics, features and part
names are described in this section.
Introduction
Pump structure & Operating principle
The EWN series is a diaphragm metering pump which consists of a pump
head, drive unit and control unit. A diaphragm is directly driven by electromag-
netic force.
Principle of operation
The pulse signal controls the electromagnetic force and spring force in order
to make reciprocating motion. The reciprocating motion is transferred to a
diaphragm through a plunger and then volumetric change occurs in the pump
head. This action transfers liquid along with pump head valve action.
Control unit Pump headDrive unit
OUT
IN
Spring
Pump head valve
(Discharge side)
Pump head valve
(Suction side)
Plunger
Diaphragm

13
Outline
Introduction
Features
● Multi voltage
All the EWN-R series is multivoltage type (100-240VAC) and can be selected
without concern for local power voltage.
● High resolution
Digitally-controlled stroke rate range is 0.1-100%. The stroke length shifts for
a ne ow adjustment.
● Waterproof and dustproof structure (IP65)
With the aim of improving resistance to exposure to liquid, the controller unit
is installed on the back of the pump and the control panel is protected with a
cover as standard equipment. A rubber gasket is provided between the pump
head and the bracket to prevent water from entering from the periphery of the
pump head.
*This pump is not completely water resistant. Protect the pump with a cover when
installing it out of doors.
Operational function
● Manual operation (see page 48)
The start/stop of the pump by key operation
*Manual operation can be done at any time during operation or stop.
● EXT operation (see page 49)
The pump operation by the external signal.
The external operation is available after the multiplier or divider program-
ming.
Pump operation
Run Run
Stop
Key operation
(Push key)
Stop

14
Introduction
Multiplier programming (See page 51)
1-9999 shots can be programmed to one pulse signal.
*In the EXT operation, the pump runs at the manual operation stroke rate.
*The pump runs in 1:1 operation when the multiplier is programmed to 1.
Example) When the multiplier is programmed to 5, the pump makes ve
shots per signal.
A buffer works when the pump receives the external signal before the pro-
grammed shots per signal is completed.
*The buffer stores the external signals for up to 65535 shots.
Divider programming (See page 53)
1-9999 pulse signals can be programmed to make one shot.
*The pump can not run over a programmed stroke rate (max. 100%) even if the ex-
ternal signal is entered to run the pump faster.
*The pump runs in 1:1 operation when the divider is programmed to 1.
Example) When the divider is programmed to 5, The pump makes one shot
per 5-signal.
1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3
Pulse signal input
Pump operation
1 2 3 4 5 1 2 3 4 5
Pulse signal input
Pump operation
Pulse signal input
Pump operation
1 2 3 4 5 1 2 3 4 5 1 2 3 4 5

15
Outline
ANA. R (analogue rigid) programming
The pump increases/decreases a flow rate in proportion to 0-20mA. Four (4-
20, 20-4, 0-20, 20-0) programs are provided.
In "4-20" or "20-4" program a disconnection sensor works to stop the pump
as a current value falls below 4mA ("DISCN" blinks on the screen). Check
wiring as necessary. Pushing the start/stop key, this state is released.
Condition
The left graph is in the following
programs.
a. 4-20 (Default setting)
b. 20-4
c. 0-20
d. 20-0
ANA. V (analogue variable) programming
The pump increases/decreases a flow rate in proportion to 0-20mA.
Setting two points can draw a straight line. Depending on the position of the
two points, 0 % may not come at 0mA in some cases. When the stroke rate
could become over 100% at some mA due to the setting, pump speed is lim-
ited to 100%.
Condition
The left graph is in the following
setting.
P1 = 6 mA, 30%
P2 = 17 mA, 85%
20mA
100%
0 4
a
d
c
b
20mA
100%
17
30
85
P1
P2
0 6
Introduction

16
Introduction
● STOP function (See 60 page)
The start/stop of the pump can be controlled by the external signal.
When "NOR. OP" is selected...
The pump stops while receiving the external signal via the STOP terminal.
*The pump resumes operation when the STOP signal is released.
When "NOR. CL" is selected...
The pump runs while receiving the external signal via the STOP terminal.
*The pump stops operation when the stop signal is released.
● Pre-STOP function (See 60 page)
When "NOR. OP" is selected...
The STOP LED lights orange while the pump receiving the external signal via
the Pre-STOP terminal (a contact is closed). Note the pump does not stop
running.
When "NOR. CL" is selected...
The STOP LED stops lightening while the pump receiving the external signal
via the Pre-STOP terminal (a contact is closed).
STOP signal input
Pump operation
Run Run
Stop
STOP signal input
Pump operation
Run
Stop Stop
The pump stops running while
the STOP signal is inputted.

17
Outline
● AUX function (See 37 page)
The pump runs at the maximum stroke rate while receiving the external sig-
nal via the AUX terminal. Use this function for degassing.
● PRIME function (See 37 page)
The pump runs at the maximum stroke rate while both the UP and DOWN
keys are pressed. Use this function for degassing.
● OUTPUT function (See 64 page)
Signals can be sent via the output terminal in sync with a manual operation.
The terminal can be set to on or off.
1 2 3 4 5 1 2 3
Pulse signal input
Pump operation
1 2 3 4 5 1 2 3
▲+▼ keys
Pump operation
Press Press
Introduction

18
Part names
Pump
Part names
Control unit
Used for the start/stop of the
pump and stroke rate adjust-
ment/programming..
Air vent port
Always connect a tube.
Be sure to return the tube
end to the supply tank or
another container.
The air vent port can
rotate 90 degrees.
Stroke length
adjusting knob
Used for adjusting
the flow rate.
Adjusting screw
Used for opening the air vent port.
Nameplate
Describes the
pump specification.
Base
Always fix with bolts.
Pump head
Inlet
Outlet
Air vent body

19
Outline
ON
STOP
MAN DIV MULT ANA. RV P
!
OVER P1 2 LOCK Err Disp SET
spm
L/h
mA
EXT
DISP
Operational panel
Part names
DOWN key
Used for decreasing numeric
values or selecting a program-
ming mode.
LED
Lights as the pump is turned
on and blinks at each shot.
UP key
Used for increasing numeric val-
ues or selecting a programming
mode.
Display
An operational status, current mode and
programmed value are shown here.
Start/stop key
Used for starting/stopping
the pump operation.
EXT key
Used for entering the
EXT mode.
DISP key
Used for checking flow infor-
mation or changing units.

20
■ Basic displays & Pump states
STOP LED
lights redly
ON LED lights
orange
ON LED lights
greenly
ON LED blinks
greenly
―
Manual wait
state. Display
shows stroke
rate in %.
―
The pump
is running in
manual mode.
Display shows
stroke rate in %
― ―
EXT(Multiply)
mode. The
pump is waiting
for the external
signal.
EXT(Multiply)
mode. The
pump is making
the displayed
# of shots per
signal.
― ―
EXT(Divide)
mode. The
pump is waiting
for the external
signal.
EXT(Divide)
mode. The
pump is running
at the displayed
stroke rate.
― ―
EXT(ANA.
R) mode. The
pump is wait-
ing.
EXT(ANA.
R) mode. The
pump is running
at the displayed
stroke rate.
― ―
EXT(ANA.
V) mode. The
pump is wait-
ing.
EXT(ANA.
V) mode. The
pump is running
at the displayed
stroke rate.
― ― ―
AUX mode.
The pump
is running at
the maximum
stroke rate.
Part names
MAN
%
MULT
DIV
%
ANA. R
%
ANA. V
%