Table of Contents
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Summary of Contents for Walchem EZ Series
- Page 1 W A L C H E M IWAKI America Inc. EZ Series Metering Pumps EZ 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...
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Page 3: Table Of Contents
TABLE OF CONTENTS Thank you for choosing a Walchem EZ Series metering pump. This instruction manual deals with the correct 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. The shaft is attached to a PTFE faced diaphragm which is part of the pump unit. -
Page 5: Model Code
Options Multifunction Valve is supplied in place of the manual air vent valve. Available for the EZ series pumps with VC, VE, VF, PC and PE liquid ends. Not available with the AAVV feature. Auto Air Vent Valve supplied in place of manual air vent valve. -
Page 6: Specifications
Specifications Electrical 50/60 Hz, single phase 115 VAC±10% 0.9 Amp max. 16 watt avg. 230 VAC±10% 0.4 Amp max. 16 watt avg. 115 VAC±10% 1.4 Amp max. 24 watt avg. 230 VAC±10% 0.6 Amp max. 24 watt avg. Operating Conditions Ambient temperature 32°F to 122°F (0°C to 50°C) Relative humidity... -
Page 7: Dimensions
Dimensions EZ Models with thermoplastic liquid end materials EZB Model Shown for reference All dimensions in inches P & Q Model TUBING 1.46 7.44 5.91 7.24 3.21 0.87 0.08 3.54 (3.03) 0.20 1.02 (9.53) 3/8” O.D. 3.94 [6.11] [8.39] [1.83] [7.81] 3.21 0.87... -
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. Pumps are pre-primed with water at the factory. If the application is not compatible with water, drain and dry before use. Be sure to remove caps from fittings before attaching tubing. -
Page 9: Supply Tubing
Coupling Nut Injection (Air Vent Valve) Valve Point of Injection Coupling Nut Return Line PVC Pipe Tubing Straightener Air Gap (user supplied) Coupling Nut Foot Valve Figure 4 Tubing Connections 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 10: Discharge Tubing
Discharge Tubing Cut a length of tubing long enough to go from the pump to the application (injection) point. Additional tubing can be ordered from your distributor. Avoid sharp turns or bends and hot surfaces. Routing tubing through rigid pipe such as PVC pipe is recommended for long runs and/or as protective shielding against corrosive chemicals. -
Page 11: Interlocking Pump
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 installed. -
Page 12: Operation
OPERATION Priming Install the pump as described above. With the pump turned on, set frequency at 100%. If the pump is equipped with an air vent valve, open the knob 1/2 turn. Liquid should move through the suction tubing and into the pump head. When liquid starts running through the vent side tubing, close the air vent knob and continue with output adjustment described below. - Page 13 B. EZ Pumps using the ‘T’ Control Module The EZB-Timer Series is able to operate in Daily, Weekly and 2-Week modes. An external stop input and 12VDC output are also available. Display/Keypad Overview Alpha/numeric display. Indicates WAIT mode, stroke frequency, NUM indicator.
- Page 14 EZ-T Quick Reference Guide MODE Select Key Mode 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. 1. 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.
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Page 16: Calibration
Pressing MODE again will display the current time and date. The pump is now operating in the TIMER mode and will come on at the next programmed timer operation. Calibration If exact output calibration is required, first prime and adjust the pump as above. -
Page 17: Auto Air Vent Valve Operation
Auto Air Vent Valve Operation The Auto Air Vent Valve is an option on select EZ pumps and replaces 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 Air Vent Valve constantly bleeds a controlled amount of volume out of the “Air”... -
Page 18: Multifunction Valve Operation
MultiFunction Valve Operation The MultiFunction Valve is optional on select EZ pumps and replaces the standard Manual Air Vent Valve when ordered. It integrates the air venting/bleeding functions with a back pressure and anti-siphon valve. Air Vent / Bleed Function 1. -
Page 19: 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, discharge tubing, and air vent tubing. -
Page 20: Exploded View & Parts Guide
EXPLODED VIEW & PARTS GUIDE PVC/GFRPP Liquid End Exploded View #1 For EZ pump model sizes 11, 16, and 21 Manual Air Vent Valve (Standard) Auto Air Vent Valve (Optional) Item #1 EZ Heads (Qty 1) Part No Description Size Liquid End Mat’l EH1947 ZB11 PVC... - Page 21 PVC/GFRPP Liquid End Exploded View #1 Components Item Part No Description Size Liquid End Mtl EH0400 Housing, Valve, 3/8 PVC 11, 16, 21 VC, VE, VF, VCA EH0418 Housing, Valve, 3/8 GFRPP 11, 16, 21 PC, PE EH0401 Nut, Coupling, 3/8 PVC 11, 16, 21 VC, VE, VF, VCA EH0419...
- Page 22 PVC/GFRPP Liquid End Exploded View #2 For EZ pump model sizes 31 and 36 Entire Head Assembly Valve Cartridge Air Vent Valve Part numbers for these assemblies are on Page 26...
- Page 23 PVC/GFRPP Liquid End Exploded View #2 Components Item Part No Description Size Liquid End Mtl EH1952 Head, ZB31, PVC VC, VE, VF EH1960 Head, ZC31, PVC VC, VE, VF EH1953 Head, ZC36, PVC VC, VE, VF EH1959 Head, ZB31, GFRPP PC, PE EH1961 Head, ZC31, GFRPP...
- Page 24 PVDF Liquid End Exploded View #3 For all PVDF EZ Pump Models TC Only TC Only FC Only 31 and 36 11, 16, and 21 All sizes Entire Head Assembly Valve Cartridge 14 (FC only) Air Vent Valve Part numbers for these assemblies are on Page 26 14 (FC only)
- Page 25 PVDF Liquid End Exploded View #3 Components Item Part No Description Size Liquid End Mtl EH1963 Head, ZB11, PVDF FC, TC EH1968 Head, ZB16, PVDF FC, TC EH1964 Head, ZB21, PVDF FC, TC EH1969 Head, ZB31, PVDF FC, TC EH1970 Head, ZC16, PVDF FC, TC EH1965...
- Page 26 Accessories (Not Shown) Part No. Description Size Liquid End Mtl E90001 Valve, Injection 3/8 11, 16, 21 E90002 Valve, Injection 3/8 11, 16, 21 VE, VF E90003 Valve, Injection, 3/8 11, 16, 21 E90004 Valve, Injection, 3/8 11, 16, 21 E90007 Valve, Injection, 1/2 31, 36...
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Page 27: 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 rive and Control Components Item Part No. Description Series E00152 Cover, Keypad EZ-D E00153 Membrane Keypad... - Page 28 Head Assembly Air Vent Valve Assembly EZB, EZC Control Module Valve Cartridge (not shown in this view) Drive Unit Key letters: Drive Unit Control Module Valve Cartridge Head Assembly Air Vent Valve Assembly...
- Page 29 Head Assembly * Pump Drive Control (Spare Parts Kit) Model Unit Module EZB11D1- ZB11-D1 EZBD1 ZB11PC ZB11PE ZB11VC ZB11VE ZB11VF ZB11TC ZB11FC (X11PC-PK) (X11PE-PK) (X11VC-PK) (X11VE-PK) (X11VF-PK) (Z11TC-PK) (Z11FC-PK) EZB11D2- ZB11-D2 EZBD2 EZB16D1- ZB16-D1 EZBD1 ZB16PC ZB16PE ZB16VC ZB16VE ZB16VF...
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Page 30: 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. - Page 31 Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA TEL 508-429-1110 FAX 508-429-7433 WEBSITE: www.walchem.com...
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