IWAKI PUMPS EWN-R User manual

2012 IWAKI CO., LTD.
Iwaki
Electromagnetic Metering Pump
EWN-R (Chlorine Dioxide type)
Instruction manual
Thank you for choosing our product.
Please read through this instruction manual before use.
This manual is intended to supplement the EWN-R series
standard manual of T683 and addresses new information for
the release of the Chlorine Dioxide type.
Always keep it on hand for quick reference.
T811 '12/02
( )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 Italia S.R.L. 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 : 1367 2030 Malaysia IWAKIm Sdn. Bhd. TEL : [phone] FAX : [phone]
China IWAKI Pumps (Shanghai) Co., Ltd. TEL : [phone] FAX : [phone] Norway IWAKI Norge AS TEL : [phone] FAX : [phone]
China IWAKI Pumps (Guangdong) 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 EUROPE NL Branch 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 Inc TEL : [phone] FAX : [phone]
Indonesia IWAKI Singapore (Indonesia Branch) TEL : [phone] FAX : [phone] Vietnam IWAKI Pumps Vietnam Co.,Ltd. TEL : [phone] FAX : [phone]

2
Order conrmation
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 distributor.
a. Check if the delivery is correct.
Check the nameplate to see if the
information such as model codes dis-
charge capacity and discharge
pressure are as ordered.
b. Check if the delivery is damaged or deformed.
Check for transit damage and loose bolts.
Export restrictions
Technical information contained in this instruction manual might be treated
as controlled technology in your countries, due to agreements in interna-
tional 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.

3
Contents
Contents
Order conrmation ............................................................................................. 2
Identication codes......................................................................................... 4
Pump/Drive/Control units.............................................................................. 4
Pipework ........................................................................................................... 5
Tube connection ........................................................................................... 5
Wear part replacement.................................................................................... 6
Wear part list ................................................................................................. 6
Exploded view.................................................................................................. 7
Pump head ................................................................................................... 7
EWN-CH ................................................................................................. 7
Specications/Outer dimensions .................................................................. 8
Specications ............................................................................................... 8
Pump unit ................................................................................................ 8
European power cable ............................................................................ 8
Pump colour ............................................................................................ 8
Outer dimensions.......................................................................................... 9
EWN-CH ................................................................................................. 9

4
Identication codes
The model codes of the pump/drive units and the control unit represent the fol-
lowing information.
Pump/Drive/Control units
EWN - B 11 FC E R - CH
a b c d e f g h
a. Series name
EWN: Multivoltage electromagnetic metering pump
b. Drive unit (Average power consumption)
B: 20W
C: 24W
c. Diaphragm effective diameter
11: 10mm 16: 15mm 21: 20mm
d. Wet end materials
Code Pump head Valve O ring Valve seat Gasket Diaphragm
FC PVDF CE FFPM PCTFE PTFE PTFE
+ FKM
Material code
PVDF : Polyvinylidene diuoride FKM : Fluorine-contained rubber
PTFE : Polytetrauoroethylene CE : Alumina ceramics
PCTFE : Polymonochlorotriuoroethyle FFPM : Peruoroelastomer
e. Tube connection bore
No code: I.D.4 × O.D.6
f. Power cable
E: European type
g. Control unit function
R: Standard
h. Special conguration
CH: Chlorine Dioxide type
Identication codes

5
Pipework
Connect tubes to the pump and install a check valve.
Before operation
• Cut the tube ends at.
Necessary tools
• Adjustable wrench or spanner
Tube connection
a. Pass a tube into the tting nut and slide
it down to the tting as far as it will go.
Then hand tighten the nut.
b. Turn further the fitting nut 180 degrees
clockwise with an adjustable wrench or
spanner.
*The plastic tting nut may be broken if it is
tightened too much.
Tube end (Side view)
Pipework
Tube
Fitting nut
Fitting
Slide it down

6
Wear part replacement
Wear part replacement
To run the pump for a long period, wear parts need to be replaced periodically.
It is recommended that the following parts are always stocked for immediate
replacement. Contact us or your nearest distributor for detail.
Precautions
• Solution in the discharge line may be under pressure. Release the pres-
sure from the discharge line before disconnecting plumbing or disassem-
bly of the pump to avoid solution spray.
• Rinse wet ends thoroughly with tap water.
• Each time the pump head is dismantled, replace the diaphragm, O rings,
valve gaskets and valve sets with new ones.
Wear part list
Parts # of parts Estimated life
Pump
Valve set 2 sets
8000 hours
Diaphragm 1
*The high pressure types have a rear diaphragm sheet on the back side of the dia-
phragm.
*Wear part duration varies with the pressure, temperature and characteristics of liquid.
*The estimated life is calculated based on the continuous operation with clean water at
ambient temperature.
14
11
13
12
14
17
11
13
12
14
7

7
Exploded view
Pump head
■ EWN-CH
No. Part names # of parts
1Pump head 1
3Fitting 1
4Fitting nut 3
5Air vent body B 1
6Lock nut 1
7Diaphragm 1
10 Air vent body A 1
11 Valve guide 4
12 Valve seat 4
13 Valve 4
14 Valve gasket 6
17 Gasket 2
18 Diaphragm spacer *
19
Hex. socket head bolt
[PW•SW]
4
23 Adjusting screw 1
25 O ring 1
26 O ring 1
27 O ring 1
41 Cap 4
*The number of diaphragm spacers
varies with pump model.
Exploded view
4
14
11
13
12
11
13
12
17
1
23
26
25
10
27
5
3
19
7
41
18
14
11
13
12
11
13
12
17
6
14
14
14
14
4
4

8
Specications/Outer dimensions
Specications/Outer dimensions
Specications
Information in this section is subject to change without notice.
■ Pump unit
Model code
Flow rate
L/H
(mℓ/min)
Discharge
pressure
MPa
Stroke length
%
(mm)
Stroke rate
%
(spm)
Power con-
sumption
W
Current
value
A
Weight
kg
EW N - B11 2.3
(38) 1.0
50-100
(0.5-1.0)
0.1-100
(1-360)
20 0.8 2.8EWN-B16 3.9
(65) 0.7
EWN-B21 6.0
(100) 0.4
EWN-C16 4.8
(80) 1.0 40-100
(0.5-1.25) 24 1.2 3.7
EWN-C21 7.8
(130) 0.7
*These specications were collected at the time of our shipping inspection and based
on pumping clean water at ambient temperature and rated voltage.
*Flow rates were collected at the maximum discharge pressure, 100% stroke length
and 100% stroke rate. A ow rate increases as a discharge pressure decreases.
*Allowable room temperature: 0-40°C
*Allowable liquid temperature: 0-60°C
*Allowable power voltage deviation: ±10% of the rated range
■ European power cable
Conduction
section area 0.75 [mm2] Triplex cable(L/N/PE) Standard H03VV-F
Length 2000 [mm] Terminal
treatment European plug
■ Pump colour
Blue Munsell colour system 7.5PB 3/8
Red Munsell colour system 5R 3/10

9
Specications/Outer dimensions
Outer dimensions
■ EWN-CH
40
125
(255)
(68)
116
100
6
(198)
(164)
(34)
100
(23)
80
106
15
20
15 20
IN
10
(37)
AIR
OUT

10