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Iwaki
Electromagnetic Metering Pump
EHN-YN (multi-tube connection)
Instruction manual
Thank you for choosing our product.
Please read through this instruction manual before use.
This instruction manual describes important precautions and instruc-
tions for the product. Always keep it on hand for quick reference.
©2010 IWAKI CO., LTD.
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Table of Contents
Related Manuals for IWAKI PUMPS EHN-B11VC
Summary of Contents for IWAKI PUMPS EHN-B11VC
- Page 1 Iwaki Electromagnetic Metering Pump EHN-YN (multi-tube connection) Instruction manual Thank you for choosing our product. Please read through this instruction manual before use. This instruction manual describes important precautions and instruc- tions for the product. Always keep it on hand for quick reference. ©2010 IWAKI CO., LTD.
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Page 2: Order Confirmation
Order confirmation 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, discharge capacity, discharge pressure and power voltage are as ordered. -
Page 3: Table Of Contents
Contents Order confirmation ............................2 Safety instructions ..............6 Warnings ................................ 7 Cautions ................................. 8 Precautions for use ............................ 10 Overview ...................12 Introduction ..............................12 Pump structure & Operating principle ...................... 12 Features ..............................13 Operational function ........................... 13 Manual mode ............................13 EXT mode .............................. - Page 4 Operation ..................31 Before operation ............................31 Points to be checked ..........................31 Retightening of pump head fixing bolts ....................31 Use of a hexagon wrench instead of a torque wrench ................ 31 Degassing ..............................32 Flow rate adjustment ..........................34 Flow rate, stroke rate and stroke length ....................34 Precautions of flow rate adjustment ....................34 Stroke rate adjustment ........................
- Page 5 Exploded view ............................. 57 Pump head, Drive unit & Control unit ....................... 57 Pump head ............................... 58 EHN-B11/-B16/-B21/-B31/-C16/-C21/-C31/-C36 VC/VH/PC/PH ............58 EHN-B11/-B16/-B21/-B31/-C16/-C21/-C31/-C36 PP ................58 EHN-B11/-B16/-B21/-B31/-C16/-C21/-C31/-C36 -NAE ............... 59 Check valve (VC/VH/PC/PH/PP) ......................59 Specifications/Outer dimensions ......................60 Specifications ............................60 Pump ..............................60 Control unit ............................
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Page 6: Safety 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 follow- ing symbols. -
Page 7: Warnings
WARNINGS 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. Electrical shock Stop operation If you notice any abnormal or dangerous conditions, suspend operation immediately and inspect/solve problems. -
Page 8: Cautions
CAUTIONS Qualified personnel only The pump should be handled or operated by qualified personnel with a full understanding of the pump. Any person not familiar with the product Requirement should not take part in the operation or management of the pump. Use specified power only Do not apply power other than that specified on the nameplate. - Page 9 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. Prohibited Grounding Risk of electrical shock! Always properly ground the pump. Conform to lo- cal electric codes.
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Page 10: Precautions For Use
Precautions for use • Electrical work should be performed by a qualified electrician. Otherwise, personal injury or property damage may result. Caution • Do not install the pump: –In a flammable atmosphere. –In a dusty/humid place. –In direct sunlight or wind & rain. –Where ambient temperature can exceed 40ºC or falls below 0ºC. - Page 11 • The pump has a rating of IP65, but is not waterproof. Do not operate the pump while wet with solution or water. Failure or injury may result. Immedi- ately dry off the pump if it gets wet. Caution • Do not close discharge line during operation. Solution may leak or tub- ing may break.
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Page 12: Overview
Overview Pump characteristics, features and part names are described in this sec- tion. Introduction Pump structure & Operating principle The EHN series is a diaphragm metering pump which consists of a pump head, drive unit and control unit. A diaphragm is directly driven by electromagnetic force. Principle of operation Electromagnetic force and spring force make reciprocating motion. -
Page 13: Features
Features ● Multivoltage operation The EHN series is a multivoltage type (100-240VAC) and can be selected without concern for local power voltage. ● High turndown ratio Offers a digitally-controlled range of 1-360 (1spm resolution). ● IP rating of 66 The sealed drive unit and control unit assure IP66. * This pump is not water resistant. -
Page 14: Ext Mode
EXT mode ■ Proportional control (Analogue control : See page 39) The pump increases/decreases a stroke rate in the range of 0-360spm in proportion to 0-20mA. An optimal proportional line must be established beforehand based on two different operating points (P1-A1, P2-A2). -
Page 15: Divisor Programming
■ Divisor setting (Digital control : See page 43) The pump increases/decreases a stroke rate by the external signal and the divisor. Set a divisor (1-999 pulse rates) per shot in advance of operation. * In the digital control with a preset divisor, the pump does not run over 360 spm at any pulse rate. *The pump makes one shot per pulse when a divisor is set to 1. -
Page 16: Part Names
Part names Pump Gasket Covers a control unit mounting screw. Adjusting screw Used for opening the air vent port. 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. -
Page 17: Operation Panel
Operation panel STOP OVER Lights as the pump stops Lights when the pump is set running by the STOP signal. to run over 360spm through an EXT mode. Lights during EXT operation. WAIT Set point 1 and 2 Lights during a wait state. Lights when set point 1 and 2 are being set for analogue control. -
Page 18: Basic Displays
■ Basic displays Display States Manual mode. The pump is running at 360spm. A waiting state. "WAIT" indication appears. Numerical value shows the MAN speed. EXT mode with a multiplier 5. The pump is making five shots per signal. EXT mode with a divisor 5. The pump is making one shot per 5-signal. -
Page 19: Alarm Displays
■ Alarm displays Display States "EXT" and "OVER" indications appear when the pump under ana- logue control is set to run over 360spm by the external current signal, however, the pump speed does not exceed that maximum rate at any current value. -
Page 20: Identification Codes
Identification codes Each code represents the following information. Pump EHN - B 11 VC M YN - a. Series name EHN : Multivoltage electromagnetic metering pump b. Drive unit (Average power consumption) B : 20W C : 24W c. Diaphragm effective diameter 11 : 10mm 16 : 15mm 21 : 20mm... -
Page 21: Control Unit
e. Tube size Code Tube I.D. × O.D. Applicable pumps ø4×ø9/ø4×ø6 EHN-11/-16/-21 No code* ø8×ø13/ø9×ø12 EHN-31/-36 *A numeric code in this field represents a custom tube size. f. Fitting : Multi-tube connection g. Control unit function : High functional h. Special version : High compression type NAE : Auto degassing type Control unit... -
Page 22: Installation
Installation This section describes the installation of the pump, piping and wiring. Read through this section before work. Points to be observed Observe the following points when installing the pump. • Be sure to turn off power to stop the pump and related devices before service is per- formed. -
Page 23: Plumbing
Plumbing Connect tubes to the pump and install a check valve. Before operation Tube end (side view) • Cut the tube ends flat. Necessary tools • An adjustable wrench or spanner. Tube connection a. Pass a tube into the fitting nut and stopper and then slide it down Tube to the adapter as far as it will go. - Page 24 Connect tubes into the inlet and outlet. Outlet Tube Inlet Tube Connect an air bleed tube into the air vent port (or automatic air vent port for the NAE type). Route back the other tube end to a supply tank or a container. Air bleed tube Air vent port Automatic air...
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Page 25: Check Valve Mounting
Check valve mounting Install an optional check valve to the EHN-YN for the prevention of a back flow, siphon and overfeeding. In the following cases be sure to install the check valve. • A suction side liquid level is higher than a discharge side or an injection point at atmospheric pressure. Suction side Discharge side •... - Page 26 Mount a check valve at the discharge tube end. * The CAN check valve has the R1/2 and R3/8 thread connections as well as an O.D. 9mm tube connection. Cut off an unused part and adjust the connection length as necessary. CA check valve R1/2 O.D.9mm...
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Page 27: Wiring
Wiring Wiring for power voltage, earthing and external signals. Points to be observed Observe the following points during wiring work. • Electrical work should be performed by a qualified electrician. Always observe local electric codes. • Observe the rated voltage range, or the electrical circuit in the control unit may fail. •... -
Page 28: Signal Wire Connection
Surge voltage The electronic circuit in the control unit may fail due to a surge voltage. Do not place the pump close to a high power device of 200V or more which may generate a large surge voltage. Otherwise, take any of the following measures. •... - Page 29 NOTE • Do not lay on these signal cables in parallel with a power cable. Otherwise the electromagnetic induction noise is generated and malfunction or failure may result. • The following products are the recommended SSRs (Solid State Relays) for signal input. Any other SSRs might cause malfunction.
- Page 30 Connect the external signal cable. a. Use a precision screwdriver to connect signal wires to the signal- line terminal block. b. Attach the power-line and signal-line terminal blocks to the PCB. c. Adjust the slackness of the signal cable, pulling it out. d.
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Page 31: Operation
Operation This section describes pump operation and programming. Run the pump after pipework and wiring are completed. Before operation First check tubing and wiring are correct. And then perform degassing and flow rate adjust- ment before starting operation. Points to be checked Before operation, check if: •... -
Page 32: Degassing
Degassing The gas in the pump and tubing is the obstacle to liquid delivery and needs to be expelled before the pump is started. Especially: • When the pump starts to run for the first time. • When a flow rate is too low. •... - Page 33 Rotate the adjusting screw two revolutions anticlockwise Adjusting screw to open the air vent port. NOTE Do not rotate the screw three revolutions. The adjusting screw may come off with solution spray. Push the start/stop key and run the pump for more than ten minutes for degassing.
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Page 34: Flow Rate Adjustment
Flow rate adjustment The flow rate can be changed by a stroke rate and a stroke length adjustment. The stroke rate represents the pump speed in spm (stroke per minute). The stroke rate adjustment is the main way to adjust the flow rate from the pump. The stroke length represents the moving distance of the plunger. -
Page 35: Stroke Rate Adjustment
■ Stroke rate adjustment The stroke rate can be set by keypad operation from 1 to 360spm. The relation between the flow rate* and the stroke rate is shown as below. Fixed stroke length * 100% discharge capacity equals to the flow rate described on the nameplate. -
Page 36: Stroke Length Adjustment
■ Stroke length adjustment The stroke length can be adjusted when the moving distance of the plunger is changed by the stroke length adjusting knob. The stroke length adjustment range is 50-100% for the B type, 40-100% for the C type. The relation between the flow rate* and the stroke length is shown as below. -
Page 37: Operation Programming
Operation programming Operation at each mode is individually set and controlled by keypad operation. Select a prop- er mode to make optimal operation. Default setting and Setting range Minimum incre- Mode Parameters Default Setting ranges ment/decrement Stroke rate Manual 1-360 1*²... -
Page 38: Programming Flow
Programming flow STOP ON/OFF selection Buffer ON/OFF selection Buffer ON (Divisor) Buffer OFF (Multiplier) EXT mode selection Digital control (Divisor) Digital control (Multiplier) Power ON Buffer OFF (Divisor) Buffer ON (Multiplier) Wait state Analog control Digital/Analog selection WAIT Digital control Analog control Manual operation WAIT... -
Page 39: Operation
Operation Read this section before operation. Manual operation Run or stop the pump by keypad operation. Supply the rated power voltage to the pump. The ON LED lights and a previous mode at the last shutoff returns. * The pump waits in the manual mode when turning on power with a default setting. Push the start/stop key to return to the wait state. - Page 40 Select "ANA". Scroll through "dIG" and "ANA" selection by the UP and DOWN keys. Push the start/stop key to return to the wait state. Push the DOWN key while pressing the EXT key to call up the analog control set- ting mode.
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Page 41: Digital Control Programming
■ Digital control programming The pump operation is controlled by the external (pulse) signal. Set a multiplier or a divisor as necessary for its intended purpose before operation. Multiplier setting The pump increases/decreases a stroke rate by the external signal and the multiplier. Set a multiplier (1-999 shots) per pulse in advance of operation. - Page 42 Push the EXT key to call up the buffer ON/OFF selection. Scroll through "X-ON" and "X-OFF" by the UP and DOWN keys. Buffer ON/OFF selection Buffer OFF (Divisor) Buffer ON (Divisor) Buffer ON (Multiplier) Buffer OFF (Multiplier) Push the start/stop key to return to the wait state. Push the DOWN key while pressing the EXT.
- Page 43 Divisor programming The pump increases/decreases a stroke rate by the external signal and the divisor. Set a divisor (1-999 pulse rates) per shot in advance of operation. NOTE If a divisor is set to 1, the pump speed equals to the external pulse rate (1:1 operation). This operation, how- ever, may be upset when the pulse rate has exceeded 360spm and the extra signals are cancelled.
- Page 44 Push the EXT key to call up the buffer ON/OFF selection. Scroll through "/-ON" and "/-OFF" by the UP and DOWN keys. Buffer ON/OFF selection Buffer OFF (Divisor) Buffer ON (Divisor) Buffer ON (Multiplier) Buffer OFF (Multiplier) Push the start/stop key to return to the wait state. Push the DOWN key while pressing the EXT key.
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Page 45: Stop Function
STOP function The start/stop of the pump operation can be controlled by the external stop signal. • Operation stop at the stop signal input: "M-OF" The pump stops while receiving the stop signal. • Operation resumption at the stop signal input: "M-ON" The pump runs while receiving the stop signal. -
Page 46: Keypad Lock
Keypad lock Keypad lock can be active for the prevention of erroneous key operation. NOTE Any key operation is not effective when keypads are locked. In an emergency, turn off the main power to stop operation. Keypads are locked again when the pump is powered. ■... -
Page 47: Maintenance
Maintenance This section describes troubleshooting, maintenance, wear part replace- ment, exploded views and specifications. Points to be observed Observe the following points during maintenance work. • Follow instructions in this manual for replacement of wear parts. Do not disassemble the pump beyond the extent of the instructions. -
Page 48: Troubleshooting
Troubleshooting First check the following points. If the following measures do not help remove problems, con- tact your nearest distributor. ■ Pump States Possible causes Solutions The pump does not Power voltage is too low. • Observe the allowable voltage range of run. -
Page 49: Inspection
Inspection Perform daily and periodic inspection to keep the best pump performance and safety. Daily inspection Check the following points. If you notice any abnormal or dangerous conditions, suspend operation immedi- ately and inspect/solve problems. See the "Troubleshooting" section as necessary. When wear parts come to the life limit, replace them with new ones. -
Page 50: 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 your nearest distributor for detail. Precautions • Solution in the discharge line may be under pressure. Release the pressure from the discharge line before disconnecting plumbing or disassembly of the pump to avoid solu- tion spray. -
Page 51: Before Replacement
Before replacement First release pressure from the pump head and discharge line. Stop the pump operation. Rotate the adjusting screw two revolutions anticlockwies or open an air vent line to re- lease pressure. NOTE Do not rotate the screw three revolutions from the closed position. The adjusting screw may come off with solution spray. - Page 52 Remove the air vent body B by the 21mm box wrench Air vent body B Pull out the valve set by a pair of tweezers. Build up the new valve set into the pump head and fasten Air vent body B the air vent body B via the lock nut.
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Page 53: Suction Valve Set Disassembly/Assembly
■ Suction valve set disassembly/assembly NOTE Be careful not to drop the valve set. Remove the fitting nut and remove the suction tube. Fitting nut Suction tube Remove the fitting by an adjustable wrench or a spanner. Fitting Pull out the valve set by a pair of tweezers. Place a new valve set into the fitting. -
Page 54: Air Vent Valve Set Replacement (Nae Type)
Air vent valve set replacement (NAE type) Loosen the fitting nut and remove the air bleed tube. Air bleed tube * Be careful not to get wet with a residual chemical AUTO air vent port Remove the fitting by an adjustable wrench or a spanner. Fitting Pull out the valve set by a pair of tweezers. -
Page 55: Diaphragm Replacement
Diaphragm replacement Necessary tools • An adjustable wrench or spanner • A hexagon wrench • A torque wrench NOTE Pay attention not to loose diaphragm spacers. A few diaphragm spacers may be inserted between the retainer and plunger for the adjustment of a diaphragm location. Note that the number of diaphragm spacers provided varies at different pumps. - Page 56 NOTE • Fit the retainer with its round edge to the diaphragm. Mating parts • Do not remove the bracket spacer. If removed, replace it Bracket as shown to the right. Bracket spacer Screw the new diaphragm into the plunger as far as it will go. Run the pump and set the stroke length to 100%.
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Page 57: Exploded View
Exploded view Pump head, Drive unit & Control unit Do not dismantle the pump beyond the extent shown in the diagram below. Air vent Cable gasket Cable nut Terminal case Diaphragm spacer Gasket Valve set* Retainer Tapping screw Control unit Diaphragm Bracket Valve set*... -
Page 58: Pump Head
Pump head ■ EHN-B11/-B16/-B21/-B31/-C16/-C21/-C31/-C36 VC/VH/PC/PH Part names # of parts Pump head Fitting Fitting nut Air vent body B Lock nut Diaphragm Retainer Air vent body A Valve guide Valve seat Valve Valve gasket O ring Diaphragm spacer Hex socket cap bolt [PW•SW] Adjusting screw O ring O ring... -
Page 59: Ehn-B11/-B16/-B21/-B31/-C16/-C21/-C31/-C36 -Nae
■ EHN-B11/-B16/-B21/-B31/-C16/-C21/-C31/-C36 -NAE Part names # of parts Pump head Fitting Fitting nut Air vent body B Lock nut Diaphragm Retainer Air vent body A Valve guide Valve seat Valve Valve gasket O ring (S14) Diaphragm spacer Hex socket cap bolt [PW•SW] Adjusting screw O ring (P4) O ring (P10A) -
Page 60: Specifications/Outer Dimensions
Specifications/Outer dimensions Specifications Information in this section is subject to change without notice. ■ Pump VC/VH/PC/PH/PP Discharge Stroke length Current Power Flow rate Stroke rate Connection Weight Model code pressure value con. ml/min EHN-B11 ø4×ø9 EHN-B16 ø4×ø6 0.5-1.0 EHN-B21 (50-100) ø8×ø13 EHN-B31 ø9×ø12... -
Page 61: Control Unit
■ Control unit Manual Mode Operation mode EXT (multiplier or divisor) Mode selection Key operation Setting range 1-360spm Stroke rate Spm programming UP and DOWN keys M-OF The pump stops during contact input. STOP function M-ON The pump runs during contact input. Input signal No-voltage contact or open collector* n (1-999) shots per signal (multiplier)*... -
Page 62: Check Valve
■ Check valve Set pressure Tube size Wet end Model code Wet ends Applicable pump models codes CA-1VC-M ø4×ø9/ EHN-B11/-B16/-B21 ø4×ø6 EHN-C16/-C21 CA-1VE-M 0.17 CA-2VC-M EHN-C31 CA-2VE-M ø8×ø13/ ø9×ø12 CA-2VCL-M EHN-B31 0.05 EHN-C36 CA-2VEL-M CA-1V-M PC/PP ø4×ø9/ EHN-B11/-B16/-B21 ø4×ø6 EHN-C16/-C21 CA-1E-M 0.17 CA-2V-M... -
Page 63: Outer Dimensions
Outer dimensions ■ EHN-B11/-B16/-B21 VC/VH/PC/PH/PP (218) (47) LOCK (21) (25) 81.5 7 16 10 ■ EHN-B31 VC/VH/PC/PH/PP (220) (47) LOCK (21) (27) 81.5 7 16 10 Specifications/Outer dimensions... -
Page 64: Ehn-C16/-C21 Vc/Vh/Pc/Ph/Pp
■ EHN-C16/-C21 VC/VH/PC/PH/PP (237) (47) LOCK (18) (27) ■ EHN-C31 VC/VH/PC/PH/PP (239) (47) LOCK (18) (29) Specifications/Outer dimensions... -
Page 65: Ehn-C36 Vc/Vh/Pc/Ph/Pp
■ EHN-C36 VC/VH/PC/PH/PP (238) (47) (18) (29) ■ EHN-B11/-B16-NAE (218) (47) AIR(AUTO) LOCK (21) (25) 81.5 7 16 Specifications/Outer dimensions... -
Page 66: Ehn-C16/-C21-Nae
■ EHN-C16/-C21 NAE (237) (47) AIR(AUTO) LOCK (18) (27) Specifications/Outer dimensions... - Page 68 TEL: +61 2 9899 2411 FAX: +61 2 9899 2421 Germany / IWAKI Europe GmbH Sweden / IWAKI Sverige AB China (Hong Kong) / IWAKI Pumps Co., Ltd. TEL: +49 2154 9254 50 FAX: +49 2154 9254 55 TEL: +46 8 511 72900 FAX: +46 8 511 72922...
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