IWAKI EWN-B31 VC 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
Overview Installation Operation Maintenance Specication
T683-5 '13/09
( )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]
Italy IWAKI Europe GmbH, Italy Branch TEL :[phone] FAX:[phone]
Austria IWAKI EUROPE GmbH
TEL :[phone] FAX:[phone]
Korea IWAKI Korea Co.,Ltd.
TEL :[phone] FAX: [phone]
Belgium IWAKI Belgium n.v.
TEL :[phone] FAX:13672030
Malaysia IWAKIm Sdn. Bhd.
TEL :[phone] FAX:[phone]
China IWAKIPumps(Shanghai)Co.,Ltd.
TEL :[phone] FAX:[phone]
Norway IWAKI Norge AS
TEL :[phone] FAX:[phone]
China IWAKIPumps(Guandong)Co.,Ltd.
TEL :[phone] FAX:[phone]
Singapore IWAKI Singapore Pte. Ltd.
TEL :[phone] FAX:[phone]
China GFTZIWAKIEngineering&Trading(Guangzhou)
TEL :[phone] FAX: [phone]
Spain IWAKI Europe GmbH, Spain Branch TEL: [phone] FAX:[phone]
China GFTZIWAKIEngineering&Trading(Beijing)
TEL :[phone] FAX:[phone]
Sweden IWAKI Sverige AB
TEL :[phone] FAX:[phone]
Denmark IWAKI Nordic A/S
TEL :[phone] FAX:[phone]
Switzerland IP Service SA
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 IWAKIEuropeGmbH,NetherlandsBranch TEL: [phone] FAX :[phone] U.K. IWAKI Pumps (UK) LTD.
TEL :[phone] FAX:[phone]
HongKong IWAKI Pumps Co., Ltd.
TEL :[phone] FAX :[phone]
U.S.A. IWAKI AMERICA Inc
TEL :[phone] FAX: [phone]
Indonesia IWAKISingapore(IndonesiaBranch)
TEL :[phone] FAX: [phone]
Vietnam IWAKI Pumps Vietnam Co.,Ltd.
TEL :[phone] FAX :[phone]

2Order conrmation
Order conrmation
After unpacking, check the following points. Contact us or your nearest
distributor if the delivery is imperfect.
a. Check if the delivery is as per order.
Check the nameplate to see if the in-
formation such as discharge capacity,
discharge pressure and power 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
Overview......................................................................................12
Introduction.....................................................................................................12
Pump structure & Operating principle .........................................................12
Features.......................................................................................................14
Operational functions...................................................................................14
Part names.......................................................................................................19
Pump............................................................................................................19
Operational panel ....................................................................................... 20
Basic displays & Pump states ................................................................21
Identication codes....................................................................................... 23
Pump/Drive units ........................................................................................ 23
Installation ..................................................................................25
Pump mounting.............................................................................................. 25
Pipework ......................................................................................................... 26
Tube connection ......................................................................................... 26
Check valve mounting ................................................................................ 28
Wiring.............................................................................................................. 30
Power voltage/Earthing .............................................................................. 30
Signal wire connection................................................................................ 32
Connections .......................................................................................... 34

4Contents
Operation.....................................................................................37
Before operation.............................................................................................37
Points to be checked ...................................................................................37
Retightening of pump head xing bolts .......................................................37
Use of hexagon wrench instead of a torque wrench ............................. 38
Degassing................................................................................................... 38
Flow rate adjustment ...................................................................................41
Stroke rate adjustment ...........................................................................42
Stroke length adjustment....................................................................... 44
Before a long period of stoppage (One month or more)............................. 45
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
spm indication..............................................................................................75

5
Contents
Maintenance................................................................................76
Troubleshooting............................................................................................. 77
Inspection....................................................................................................... 79
Daily inspection ...........................................................................................79
Periodic inspection ......................................................................................79
Wear part replacement.................................................................................. 80
Wear part list............................................................................................... 80
Before replacement .....................................................................................81
Valve set replacement .................................................................................81
Discharge valve set dismantlement/assembly .......................................81
Suction valve set dismantlement/assembly .......................................... 83
Spacer set replacement (Auto degassing type) .................................... 84
Air vent valve set replacement (Auto degassing type) .......................... 85
Diaphragm replacement ............................................................................. 85
Exploded view................................................................................................ 88
Pump head, Drive unit & Control unit ......................................................... 88
Pump head ................................................................................................. 89
EWN-[B09•B11•B16•B21•C16•C21] [VC•VH•PC•PH•TC] ..................... 89
EWN-[B31•C31•C36] [VC•VH•PC•PH•TC]............................................ 90
EWN FC .................................................................................................91
EWN C31PC/P6-V ................................................................................ 92
EWN SH/SH-H/SH-H2.......................................................................... 93
EWN with an Automatic air vent............................................................ 94
Specications/Outer dimensions ................................................................ 95
Specications ............................................................................................. 95
Pump unit .............................................................................................. 95
Power cable............................................................................................97
Pump colour ...........................................................................................97
Outer dimensions........................................................................................ 98

6Safety instructions
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 Grounding

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 operation
On sensing any abnormality or danger, suspend operation immedi-
ately 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 a power cable
Do not pull or knot a power cable or place a heavy stuff on it. Dam-
age to the 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

8CAUTION
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 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. Optimise your system in order for
the pump not to run dry. If the pump runs dry for a long period (for
more than 30 minutes), the pump head and the valve cases 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 should be
controlled 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 exceeds 40ºC or falls below 0ºC.
• Under direct sunlight or wind & rain.
Countermeasure against efux
Take protective measures 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 not use a damaged pump
Using a damaged control unit could lead to an electric leak or shock.
Disposal of the used pump
Dispose of any used or damaged pump in accordance with relevant regu-
lations. 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 evenly to the following torque in diagonal order before initial
operation. Periodically retighten them for the prevention of leakage.
Tightening torque
E WN - B11/-B16/-B21/-C16/-C21 : 2.16 N•m
EWN-B31/-C31/-C36 : 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 should 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 exceeds 40ºC or falls below 0ºC.
Protect the pump with a cover when installing it out of
doors.
• Select a level location where is free from vibration and liq-
uid can't stay. Anchor the pump with M5 bolts so as not to
vibrate. If the pump is installed at a tilt, a 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 an ample working area around the pump for inspec-
tion and maintenance.
• 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 applica-
tion is strongly recommended for these liquids.
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 a discharge line during operation. Otherwise,
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 pressure from a discharge line before dismantling
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 benzine 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
Overview
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
Overview
● Auto degassing system
• Once air is entrained through the suction port, the working pressure difference
between the pump head valve and the air vent valve separates entrained air
from liquid.
• Entrained air is expelled to open air through the automatic air vent valve body.
• Only liquid is delivered to a discharge line through the discharge port. Note a
small amount of liquid is expelled with entrained air.
OUT
AIR
LOCK
Pump head
Suction port
Air vent valve
Automatic air
vent valve body
Pump head valve
Introduction
Discharge port Air vent port

14
Features
● Multivoltage operation
The EWN-R series is a multivoltage type (100-240VAC) and can be selected
without concern for local power voltage.
● High turndown ratio
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 control 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 functions
● 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 multiplier or divisor programming.
Pump operation
Run Run
Stop
Key operation
(Push key)
Stop
Introduction

15
Overview
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 makes one shot per pulse 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 an external signal before the pro-
grammed shots per signal is completed.
*The buffer stores the external signals for up to 65535 shots.
Divisor 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 a divisor
is set to run the pump faster.
*The pump makes one shot per pulse when a divisor is programmed to 1.
Example) When a divisor 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
Introduction

16
ANA. R (analogue rigid) programming (See page 57)
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 (See page 55)
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 a 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

17
Overview
● STOP function (See page 60)
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 page 60)
When "NOR. OP" is selected...
The STOP LED lights orange while the pump is 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 is 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.
Introduction

18
● AUX function (See page 40)
The pump runs at the maximum stroke rate while receiving the external sig-
nal via the AUX terminal. Use this function for degassing.
● Priming function (See page 40)
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 page 64)
Signals can be sent via the output terminal in sync with 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

19
Overview
Part names
Pump
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 a supply tank or a
container.
The air vent port can
rotate 90 degrees.
Stroke length
adjusting knob
Used for adjusting
a flow rate.
Adjusting screw
Used for opening the air vent port.
Nameplate
Describes the
pump specifica-
tions.
Base
Always fix with bolts.
Pump head
Inlet
Outlet
Air vent body
Part names

20
ON
STOP
MAN DIV MULT ANA. RV P
!
OVER P1 2 LOCK Err Disp SET
spm
L/h
mA
EXT
DISP
Operational panel
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, a selected mode and
a 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.
Part names