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- Page 1 W A L C H E M IWAKI America Inc. EHE Series Metering Pumps EHE Series Electronic Metering Pump Instruction Manual Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA TEL: 508-429-1110 FAX: 508-429-7433 WEB: www.walchem.com...
- Page 2 This document is for information purposes only and is subject to change without notice. Statement of Limited Warranty WALCHEM warrants equipment of its manufacture and bearing its identification to be free from defects in workmanship and material for a period of two years from date of delivery from the factory...
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Page 3: Table Of Contents
TABLE OF CONTENTS Thank you for choosing a Walchem E Series metering pump. This instruction manual deals with the correct installation, operation, programming maintenance, and troubleshooting procedures for the EHE Series metering pumps. Please read through it carefully to ensure the optimum performance, safety and service of your pump. -
Page 4: Introduction
All tubing must be securely attached to the fittings prior to starting the pump (see Section 2.3). Only use Walchem tubing with your pump. Tubing should be shielded to prevent possible injury in case of rupture or damage. UV resistant tubing should be used if the tubing is exposed to UV light. Always adhere to local plumbing codes and requirements. -
Page 5: Specifications
Specifications Pump Series Electronic metering pump with external Analog and pulse control or manual speed control (adjustable to 360 strokes per minute). Manually adjustable stroke length. (Turndown ratio 1800:1) Capacity/Pressure Rating Output Capacity Output per stroke Maximum Conn. Size (in) (mL) Pressure (GPH) -
Page 6: Dimensions
Adjustment Range Stroke length adjustment range 20% to 100% Stroke Length 1 to 360 strokes per minute (1 to 240 strokes per minutes for –HV) Frequency adjustment range Operating Conditions Ambient temperature 32 to 122°F (0 to 50°C) Relative humidity 30 to 90% non-condensing Liquid temperature 32 to 104°F (0 to 40°C) for PVC based Liquid Ends... - Page 7 FC and HV Models Model 6.06 1.05 7.76 6.42 0.65 0.67 9.69 3.15 9.53 5.75 6.06 1.14 7.83 6.42 0.75 0.67 10.00 2.80 9.72 5.75 6.06 1.42 8.13 6.42 0.85 0.67 10.45 2.38 10.12 5.75 36/46 6.06 1.05 7.80 6.42 0.70 0.67 9.69...
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Page 8: Installation
INSTALLATION Unpacking Open the shipping carton and inspect contents for damage. If any items are missing or damaged contact your local distributor to arrange for replacement. CAUTION Pumps are pre-primed with water at the factory. If the application is not compatible with water, drain and dry before use. - Page 9 Figure 1 Figure 2 Figure 3 Flooded Suction Shelf Mount Tank Mount Suction Lift Suction Lift If flooded suction mounting is not possible, a shelf adjacent to (but not directly above) the supply tank often works well (see Figure 2). The supply tank or cover can also be used if it has provisions for mounting a pump (see Figure 3).
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Page 10: Supply Tubing
The EH-HV Series pumps require a flooded suction or pre-primed condition before operation. Flooded suction (mounting the pump below the level of liquid in the supply tank) is recommended for proper operation of high viscosity pumps. (See Figure 1) These pumps are not designed to be self-priming. The pump is supplied with ½”... -
Page 11: Discharge Tubing
WARNING: All fittings and coupling nuts should be tightened by hand. If necessary, small pliers may be used to make it snug. DO NOT use excessive force or large wrenches. COUPLING Rounded edge CLAMP against tubing RING TUBING ADAPTER Figure 6 Tubing Connections Discharge Tubing Cut a length of tubing long enough to go from the pump to the application (injection) point. -
Page 12: Interlocking Pump
maximum backpressure and, depending upon the application, may be higher if the back-pressure is lower than rated. Additionally, the valve does NOT act as an anti-siphon valve. If siphoning is a possibility, or if pumping downhill into open atmosphere (open tank), a separate backpressure/anti- siphon valve must be installed. -
Page 13: Operation
OPERATION Priming Install the pump as described in Section 2.0. With the pump plugged in but not pumping, set stroke length at 100% and frequency at 360 (use the buttons as necessary to adjust the frequency). If the pump is equipped with a manual air vent valve, open the knob ½-1 turn; otherwise disconnect the discharge tubing from the injection valve. -
Page 14: Control Unit Operation And Programming
Control Unit Operation and Programming The EHE Series metering pumps can be operated in either manual or external modes. The external mode can be controlled from a digital or analog external signal. An external stop function is available for remotely suspending operation of the pump and functions independent of the control mode. - Page 15 EH-E Program Overview...
- Page 16 Manual Operation (1) Power ON When power is applied to the pump, the green indicator above ON lights up, the display momentarily shows the software version (“Vx.xE”), and the controller goes to whatever mode the pump was in when power was disconnected. If being powered for the first time, the stroke rate is then displayed, the “WAIT”...
- Page 17 External Operation ANALOG INPUT OPERATION In analog mode the pump will accept a milliamp signal and produce a pump speed proportional to the signal level received. The input resistance of the analog signal is 250. The pump’s response can be fine-tuned by variable set points to meet system requirements.
- Page 18 (5) Setting the Input Current (mA) of SET point 1: Use the and keys to set the input current (mA) of SET point 1. The value will increase with the key and decrease with the key. The numerical value will change slowly by 0.1mA if the keys are pressed briefly, but will increment rapidly if they are held for more than 3 seconds.
- Page 19 (11) Setting the Stroke Rate of SET point 2: Set the stroke rate corresponding to the current setting of SET point 2 using the and keys. The allowable range is 0-360 spm and the default setting from the factory is 360 spm. (12) Press the STOP/START key to confirm the pump speed value of SET point 2 and move back to the WAIT mode.
- Page 20 DIGITAL INPUT OPERATION In digital mode, the pump can accept a non-powered (dry contact) pulse signal from a flowmeter or other similar instrument. The pump can be set to divide pulses by a factor of 1 to 999; or in multiply mode, 1 input pulse can produce 1 to 999 pump strokes.
- Page 21 (6) Press the EXT key to enter the memory selections and return to the “dIG” set menu. (7) Press the START/STOP key to confirm the Digital Operation selection and return to the WAIT mode. The SET backlight will go out and the WAIT light will illuminate. (8) Digital Input Selection: (NOTE: Pump is pre-set at factory with both MULT or DIV set to 1.
- Page 22 (11) Press the START/STOP key to confirm the operation mode and value settings. This will also return to the WAIT mode. The WAIT light will illuminate and the backlight behind SET will go out. (12) IMPORTANT: Changing the pump speed in the WAIT (or MAN) mode using the ...
- Page 23 ALARM Indications In ANALOG Input Operation, if the incoming current matching 360SPM (typically, 20mA=360SPM) is exceeded, the OVER will become backlit. The pump will continue to operate at 360SPM during this condition. While programming the Analog Input Setpoints, if the same value (current or SPM) is set for both Setpoint 1 and 2, “ERR 1”...
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Page 24: Input Wiring And Connections
Sensor Power The control circuit of the EHE series has the ability to provide 12 VDC at up to 10 mA to power a Hall effect sensor or similar device. Connect the sensor power leads to terminal 4 (positive) and... -
Page 25: Ac Power Interruption
STOP Function The EHE series pump also includes a STOP function that allows an external signal to stop the operation of the pump. A switch or solid-state device capable of switching 5 VDC at 2 mA can be connected to terminals 6 (positive) and 8 (negative) of the terminal block. -
Page 26: Maintenance
MAINTENANCE CAUTION: Before working on the pump, disconnect the power cord, depressurize the discharge tubing and drain or flush any residual liquid from the pump head and valves. Always wear protective gear when working around chemicals. Diaphragm Replacement Disconnect AC power to the pump and disconnect the suction tubing and discharge tubing. Remove the four head bolts with a 4mm hex wrench. -
Page 27: Exploded View And Parts Guide
From the exploded view drawing, identify the item number of the part(s) to be ordered. The item numbers are listed and include part number, description and size/material information. Contact your Walchem distributor for further assistance. Accessories (Not shown) Part No. Description... -
Page 28: Ehe31, 36, 46 Liquid End Exploded View
EHE31, 36, 46 Liquid End Exploded View (EHE31/36) (EHE46) 14 (EHE46 & FC models only) (FC models only) (EHE31/36) (EHE46) Head Assembly 14 (EHE46 & FC models only) EHE 31, 36, 46 Head Assembly Valve Cartridge 14 (FC models only) Manual Air Vent Valve See Page 31 for the assembly part numbers... - Page 29 EHE31, 36, 46 Liquid End Parts List Part Liquid Description Size End Mtl Part No Description Size Liquid End Mtl EH2101 Head, E31 PVC VC, VE, VF *13 EH0646 Ball, Valve, 0.500, CE VC, VE, PC, PE, FC EH2102 Head, E31 GFRPP PC, PE E00072 Ball, Valve, 0.500, PTFE EH2103 Head, E31 PVDF...
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Page 30: Ehe 56 Liquid End Exploded View
EHE 56 Liquid End Exploded View 31 32 (FC only) 19 21 (FC only) Head Assembly EHE 56 Head Assembly Valve Cartridge Manual Air Vent Valve See page 31 for the assembly part numbers... - Page 31 EHE 56 Liquid End Parts List Item Part No Description Size Liquid End Mtl EH2114 Head, E56 PVC VC, VE, VF EH2115 Head, E56 GFRPP PC, PE EH2118 Head, E56 PVC Machined EH2116 Head, E56 PVDF EH0656 Housing, Valve, E56, PVC VC, VE, VM, VF EH0685 Housing, Valve, E56, GFRPP...
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Page 32: Ehe 36-Hv Liquid End Parts List
EHE-HV Liquid End Parts List Item Part No Description Size Liquid End EH2392 Head, HV, GFRPP EH2110 Head, HV, GFRPP EH0028 O-Ring, P12, FKM 36,46 HV, HVV Housing, Valve, ½” NPT, PVC EH1244 36,46 HVT, HVP Housing, Valve, ½” Tube, GFRPP EH0679 36,46 HV, HVV... -
Page 33: Drive Control Components
Drive Control Components Item Part No. Description EH1746 Base, Pump, EHE EH0697 Cover, Control Panel EH1658 Gasket, EHE Pump Base EH1071 Screw, M5 x 12, SS, PH EH0696 Gasket, Control/Drive Unit EH0202 Grommet, Cord EH0205 Nut, Strain Relief EH0204 Cap, Strain Relief EH0706 Box, Terminal, EHE EH1036... -
Page 34: Spare Parts Kit
Assembly Part Numbers Key letter from exploded view drawing, previous pages Drive Unit Control Module Head Assembly Valve Cartridge Manual Air Vent Valve Assembly – E H E Series Size Control Voltage Liquid End Head Assembly Liquid End Code Drive Pump Unit Control Module... -
Page 35: Troubleshooting
Tighten pump head bolts. Torque: 19 lb-in (2.16 N-m) Diaphragm is damaged Replace diaphragm O-ring or valve gasket missing. Install o-ring or valve gasket SERVICE POLICY The EHE Series electronic metering pumps have a 2-year warranty. Contact your Walchem distributor for service. - Page 36 FIVE BOYNTON ROAD HOPPING BROOK PARK HOLLISTON, MA 01746 USA TEL: 508-429-1110 Web: www.walchem.com...
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