Walchem EZ Series Instruction Manual
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Walchem EZ Series Instruction Manual

Electronic metering pump
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IWAKI PUMPS
EZ Series Electronic Metering Pump
Instruction Manual
Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA
TEL: 508-429-1110
WEB: www.walchem.com

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  • Page 1 IWAKI PUMPS EZ Series Electronic Metering Pump Instruction Manual Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA TEL: 508-429-1110 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 or authorized...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Thank you for choosing a Walchem EZ Series metering pump. This instruction manual deals with the cor- rect installation, operation, maintenance and troubleshooting procedures for the EZ metering pumps. Please read through it carefully to ensure the optimum performance, safety and service of your pump.

  • Page 4: Introduction

    Principle of Operation The EZ series electronic metering pumps consist of a pump unit, a drive unit, and a control unit. The drive unit is an electromagnetic solenoid. When the solenoid coil is energized by the control unit the armature shaft moves forward due to the magnetic force of the solenoid.

  • Page 5: Model Code

    FC. Not available with the ADV feature. A Auto Degassing Valve is supplied under the manual air vent valve. Available for the EZ Series in B11/16/21 and C16/21 sizes with –VC/-VE liquid ends only.

  • Page 6: Capacity/Pressure Rating

    1.4.3 Capacity/Pressure Rating Size Maximum Maximum Connection Max Output per Output Capacity Pressure Size (in) Stroke (mL) Tubing O.D (Gal/hr) (mL/min) 0.11 0.18 0.26 0.56 0.22 0.36 0.75 0.35 1.17 Auto Degassing valve reduces output by approx. 20% 1.4.4 Adjustment Range Frequency adjustment range: 0 to 360 strokes per minute 1.4.5 Materials of Construction Liquid...

  • Page 7: Dimensions

    1.5 Dimensions EZB Models with thermoplastic liquid end materials (except -FC) 7.95” (See Note 1) 1.85” Tubing (ID x OD) ø1/4” x ø3/8” Tubing (ID x OD) ø1/4” x ø3/8” 3.54” Tubing (ID x OD) ø1/4” x ø3/8” 3.21” 3.94” 0.08”...
  • Page 8 EZC Models with thermoplastic liquid end materials (except FC) 8.66” (See Note 1) 1.85” Tubing (ID x OD) ø1/4” x ø3/8” Tubing (ID x OD) ø1/4” x ø3/8” 3.94” Tubing (ID x OD) ø1/4” x ø3/8” 4.57” 4.13” (1.06”) Model Size 16-21 0.94"...

  • Page 9: Installation

    INSTALLATION 2.1 Unpacking Open the shipping carton and inspect contents for damage. If any items are missing or damaged contact your local distributor. Pumps are pre-primed with water at the factory. If the application is not compatible with water, drain and dry before use.

  • Page 10: Supply Tubing

    Injection Coupling Nut Valve (Air Vent Valve) Point of Injection Coupling Nut Return Line PVC Pipe Tubing Straightener (user supplied) Air Gap Ceramic weight Coupling Nut Foot Valve Figure 4 Connection Tubing 2.3 Supply Tubing The supply tubing run should be as short as possible. For flooded suction mounting, install a shut-off valve with an appropriate tubing connector at the tank outlet.

  • Page 11: Discharge Tubing

    However, the back pressure by the injection valve can vary and 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 Walchem MultiFunction valve or a separate back pressure/anti-siphon valve must be in- stalled.

  • Page 12: Interlocking Pump

    Outer Diameter 1/2" 3/8" NPT 1/2" NPT Trim back as needed to fit tee or fitting Figure 7 Injection Valve 2.6 Interlocking Pump CAUTION! Control of pump operation is critical. Operation and chemical addition during no flow situations can create hazardous situations from elevated chemical concentrations and chemical gasses trapped in the line.

  • Page 13: Adjustment And Control

    3.2 Adjustment and Control 3.2.1 EZ Pumps using the ‘D’ Control Module If less than full output is required, set the frequency to the appropriate percentage of maximum desired. Example: Model EZB21D1-VE has maximum output of 1.5 GPH. Desired output is 1.2 GPH. 1.2 ÷ 1.5 = 0.8 or 80% Set the frequency of the pump to 0.8 x 360 = 288 spm by pushing the UP or DOWN arrow keys.
  • Page 14 EZ-T Quick Reference Guide MODE Mode Key Select Key FROM: PRESS: TIMER RUN MODE Move to WAIT menu MENU MODE Move to MANUAL menu WAIT MENU Move to TIME / DATE setting menu (Hold for 3 seconds) Move to TIMER programming menu HOUR Move to TIMER MODE selection menu MODE...
  • Page 15 Programming and Timer Use CAUTION! Before use, check the time and date. Set to the local time and date before programming. Incorrect time/date can result in incorrect operation. Manual Operation From the WAIT menu, pressing the MODE key will enter the manual mode. Pressing SEL will toggle the pump on and off manually.

  • Page 16: Calibration

    3.3 Calibration f exact output calibration is required, first prime and adjust the pump as above. Then connect a calibration column to the suction side of the pump. Turn the pump on for one minute and read the amount of liquid pumped from the col- umn.

  • Page 17: Auto Air Vent Valve Operation

    3.6 Auto Degassing Valve Operation The Auto Degassing Valve (ADV) is an option on select EZ pumps and is added under the standard Manual Air Vent Valve when ordered. It is used primarily in applications where gassing is a problem and pumps can lose prime. Unlike the Manual Air Vent Valve, the Auto Degassing Valve constantly bleeds a controlled amount of volume out of the “Air”...
  • Page 18 The MultiFunction Valve is optional on select E-Series pumps and replaces the standard Manual Air Vent Valve when ordered. It integrates the air venting/bleeding functions with a back pressure, anti-siphon, and pressure relief valve. For more detailed specifications of the MultiFunction Valve, see its separate instruction sheet at walchem.com. Air Vent / Bleed Function 1.

  • Page 19: Maintenance

    MAINTENANCE CAUTION! Before working on the pump, disconnect the power cord, depressurize the discharge tub- ing and drain or flush any residual liquid from the pump head and valves. Always wear protective gear when working around chemicals. 4.1 Diaphragm Replacement Disconnect AC power to the pump and disconnect the suction tubing, discharge tubing, and air vent tubing.

  • Page 20: Exploded View & Parts Guide

    EXPLODED VIEW & PARTS GUIDE PVC/GFRPP Liquid End Exploded View For EZ pump model sizes 11-36 Entire Head Assembly Valve Cartridge Multifunction Valve Part numbers for these assemblies are on Page 26...
  • Page 21 PVC/GFRPP Sizes 11-36 Liquid End Components Item Part# Description Material Size Liquid End Material EH1947 Pump Head VC, VE, VF EH1948 VC, VE, VF EH1949 VC, VE, VF EH1950 VC, VE, VF EH1951 VC, VE, VF, EH1952 VC, VE, VF EH1960 VC, VE, VF EH1953...
  • Page 22 PVC/GFRPP Sizes 11-36 Liquid End Components (continued) Item Part# Description Material Size Liquid End Material EH0061 Seat, Valve FKMA VC, PC EH0069 FKMA B16,21 / C16,21 VC, PC EH0119 FKMA B31 / C31,36 VC, PC EH0048 EPDM VE, VF, PE EH0071 EPDM B16,21 / C16,21...
  • Page 23 VCA-VEA Liquid End Exploded View For EZ pump model sizes 11 thru 21 Liquid Item Part# Description Material Size Material EH1947 Pump Head VCA,VEA EH1948 VCA,VEA EH1949 VCA,VEA EH1950 VCA,VEA EH1951 VCA,VEA EH2328 Housing, Valve (Suction) B11,16,21 / C16,21 VCA,VEA EH2330 Coupling Nut B11,16,21 / C16,21 VCA,VEA...
  • Page 24 TC/TA Liquid End Exploded View For EZ Pump Models 11-36 Liquid Item Part# Description Material Size Material EH2407 Pump Head PVDF TC, TA EH2408 PVDF TC, TA EH2409 PVDF TC, TA EH1969 PVDF TC, TA EH2411 PVDF TC, TA EH2412 PVDF TC, TA EH1966...
  • Page 25 FC Liquid End Exploded View For EZ Pump Models 11-36 Liquid Item Part# Description Material Size Material EH2407 Pump Head PVDF EH2408 PVDF EH2409 PVDF EH1969 PVDF EH2411 PVDF EH2412 PVDF EH1966 PVDF EH1967 PVDF EH2361 Housing, Valve PVDF B11,16,21 / C16,21 EH2362 PVDF B31 / C31,36...
  • Page 26 Stainless Steel (SH-N) Liquid End Exploded View For EZ Pump Models 11-36 Item Part# Description Material Size EH2021 Pump Head 316SS EH2176 316SS B16 / C16 EH2022 316SS B21 / C21 EH2023 316SS B31 / C31 EH2024 316SS EH0429 Housing, Valve 316SS B11,16,21 / C16,21 EH0433...
  • Page 27 Accessories (Not Shown) Part No. Description Size Liquid End Mtl CAN-1VC-7 Valve, Injection 3/8 11, 16, 21 CAN-1VE-7 Valve, Injection 3/8 11, 16, 21 VE, VF CAN-1PA-7 Valve, Injection 3/8 11, 16, 21 CAN-1PC-7 Valve, Injection, 3/8 11, 16, 21 CAN-1PE-7 Valve, Injection, 3/8 11, 16, 21...

  • Page 28: Exploded View

    Drive and Control Module Exploded View T-CONTROL MODULE B: D-CONTROL MODULE Drive Unit D-Control Module T-Control Module Part numbers for these assemblies are on Page 26 A: DRIVE UNIT Item Part No. Description Series E00152 Cover, Keypad EZ-D E00153 Membrane Keypad EZ-D EH1036 Gasket, Terminal Box...
  • Page 29 Head Assembly EZB, EZC Control Module Valve Cartridge (not shown in this view) Drive Unit Key letters: A Drive Unit B Control Module C Head Assembly D Valve Cartridge...
  • Page 30 Head Assembly* (Spare Parts Kits) Pump Model Drive Control Unit Module EZB11D1- ZB11-D1 EZBD1 NZB11 EZB11D2- (N11-PK) EZB16D1- ZB16-D1 EZBD1 NZB16 (N16-PK) EZB16D2- EZB21D1- ZB21-D1 EZBD1 NZB21 EZB21D2- (N21-PK) EZB31D1- ZB31-D1 EZBD1 NZB31 EZB31D2- (N31-PK) EZC16D1- ZC16-D1 EZCD1 N16 (N16-PK) EZC16D2- ZC16-D2 EZCD2...

  • Page 31: 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 EZ Series electronic metering pumps have a 2-year warranty. Contact your Walchem distributor for service.

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