IWAKI PUMPS EHN-R User manual

2008 IWAKI CO.
,
LTD.
Iwaki
Electromagnetic Metering Pump
EHN-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 Specification

2Order confirmation
1P423609
CAPACITY
MAX.PRESSURE
STROKE RATE
VOLTAGE
POWER CONSUMPTION
THERMALLY PROTECTED
MODEL
MFG.No.
m /
min
MPa
spm
V FREQUENCY 50/60 Hz
W
CURRENT A
Iwaki
Metering Pump
IWAKI CO.,LTD. TOKYO JAPAN
Back pressure valve
Check valve
Order confirmation
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 accessories are complete.
• A check valve or a back pressure valve
*The attached check valve and back pressure valve vary
with pump models. See page 86 for accessory list.
• A tube (3m)
(ø4×ø9 or ø8×ø13 PVC braided tube)
*ø4×ø9 or ø8×ø13 EVA tube is attached to the PP type.
*No tube is attached to the FC type.
*ø4×ø6 nylon tube is attached to the H type.
c. Check if the delivery is damaged or deformed.
Check for transit damage and loose bolts.

3
Contents
Contents
Order confirmation ............................................................................................. 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.......................................................................................................16
Pump............................................................................................................16
Operational panel ........................................................................................17
Basic displays & Pump states ................................................................18
Identification codes........................................................................................19
Pump/Drive units .........................................................................................19
Control unit ................................................................................................. 20
Installation..................................................................................21
Pump mounting...............................................................................................21
Pipework ......................................................................................................... 22
Tube connection ......................................................................................... 22
Check valve mounting .................................................................................24
Wiring.............................................................................................................. 26
Power supply/Earthing................................................................................ 26
External input cable.................................................................................... 28

4Contents
Operation.....................................................................................32
Before operation ............................................................................................ 32
Points to be checked .................................................................................. 32
Retightening of pump head fixing bolts ...................................................... 32
Degassing................................................................................................... 33
EHN- [11•16•21] [VC•VH•PC•PH•PP] ................................................ 34
EHN- [11•21] [FC] and
[31•36] [VC•VH•PC•PH•PP•FC]........................................................ 36
Flow rate adjustment .................................................................................. 38
Stroke rate adjustment .......................................................................... 39
Stroke length adjustment........................................................................41
Before a long period of stoppage (One month or more)..............................42
Operation programming ............................................................................... 43
Programming flow....................................................................................... 44
Manual operation........................................................................................ 46
EXT operation..............................................................................................47
EXT mode ..............................................................................................47
EXT mode programming....................................................................... 49
STOP function ............................................................................................ 58
STOP function programming................................................................. 58
STOP function cancellation................................................................... 60
Keypad lock ................................................................................................ 62
Maintenance................................................................................64
Troubleshooting............................................................................................. 65
Inspection....................................................................................................... 67
Daily inspection ...........................................................................................67
Periodic inspection ......................................................................................67
Wear part replacement.................................................................................. 68
Wear part list............................................................................................... 68
Before replacement .................................................................................... 69

5
Contents
Valve set replacement ................................................................................ 69
Discharge valve set dismantlement/assembly ...................................... 69
Suction valve set dismantlement/assembly ...........................................72
Diaphragm replacement ..............................................................................73
Exploded view.................................................................................................76
Pump head, Drive unit & Control unit ..........................................................76
Pump head ................................................................................................. 77
EHN-[B11•B16•B21•C16•C21] [VC•VH•PC•PH].................................... 77
EHN-[B31•C31•C36] [VC•VH•PC•PH] ...................................................78
EHN- PP .............................................................................................79
EHN- FC ............................................................................................ 80
EHN-[C31•C36] VH/PH-V ......................................................................81
Check valve (VC•VH•PC•PH)..................................................................... 82
Specification/ Outer dimension ................................................................... 83
Specification ............................................................................................... 83
Pump unit .............................................................................................. 83
Control unit............................................................................................ 85
Power cable........................................................................................... 85
Pump colour .......................................................................................... 85
Accessories ................................................................................................ 86
Options ....................................................................................................... 86
Outer dimensions.........................................................................................87
EHN-[B11•B16•B21] [VC•VH•PC•PH•PP] ..............................................87
EHN-B31[VC•VH•PC•PH•PP]................................................................87
EHN-[C16•C21] [VC•VH•PC•PH•PP].................................................... 88
EHN-[C31•C36] [VC•VH•PC•PH•PP].................................................... 88
EHN-[B11•B21] FC ................................................................................ 89
EHN-[C21] FC ....................................................................................... 89
EHN-[C31•C36] FC ............................................................................... 90

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", "Pro-
hibition" 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
For exportation
Technology related to the use of goods in this instruction manual falls in the
category of technology contained in the Foreign Exchange Order Attachment,
which includes complementary export control of technology. Please be remind-
ed that export license, which is issued by the Ministry of Economy, Trade, and
Industry could be required, when this is exported or provided to someone even
in Japan.

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 dangerous sign, suspend operation
immediately and inspect/solve problems.
Do not use the pump in anything other than a specified purpose
The use of the pump in any purpose other than those clearly speci-
fied may result in failure or injury. Use this product in a specified
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 fire or electrical shock.
Do not use the pump in a flammable atmosphere
Do not place dangerous or flammable goods near the pump for your
safety.
WARNING
Prohibition
Requirement
Do not remodel
Wear
protectors
Electrical
shock
Prohibition
Prohibition

8CAUTION
A qualified operator only
The pump must be handled or operated by a qualified 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 specified power only
Do not apply any power other than the one specified on the nameplate.
Otherwise, failure or fire 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 fixing screws
may loosen and liquid may leak. Optimise 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 fire or electrical shock. Install the pump free from liquid spill.
Ventilation
Poisoning may result when handling a toxic or odorous liquid. Keep
good ventilation in your operating site.
Do not install or store the pump in the following places where...
• Under a flammable atmosphere or in a dusty/humid place.
• Ambient temperature is beyond 0-40 degrees Celsius.
• Under direct sunlight or wind & rain.
Countermeasure against efflux
Take a protective measurement against an accidental chemical
overflow 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
Risk of electrical shock. Do not use the pump without a leakage
breaker. Purchase 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 fixing bolts are loose. Tighten the
bolts diagonally and evenly before initial operation. Also, periodi-
cally tighten the bolts for the prevention of leakage.
Tightening torque
EHN-B11•16•21, C16•21 : 2.16 N•m
EHN-B31, C31•36 : 2.55 N•m
Earthing
Prohibition
Requirement
Electrical
shock
Requirement
Caution
Prohibition

10 Precautions for use
• Electrical work shall be performed by a qualified opera-
tor. Otherwise, personal or property damage accident may
result.
• Do not install the pump in the following places where...
–Under a flammable 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 flow may reduce.
• When two or more pumps are installed, the pump opera-
tion interacts each other and vibration becomes significant,
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