TABLE OF CONTENTS
Thank you for choosing a Walchem EH or EZ Series metering pump. This instruction manual
deals with the correct installation, operation, maintenance and troubleshooting procedures for
the EHB, EHC and EZ model metering pumps. Please read through it carefully to ensure the
optimum performance, safety and service of your pump.
1.0
INTRODUCTION...........................................................................................................1
1.1
Safety and Caution Notes..........................................................................................1
1.2
Principle of Operation ................................................................................................1
1.3
Model Code ...............................................................................................................2
1.4
Specifications ............................................................................................................3
1.5
Dimensions................................................................................................................4
2.0
INSTALLATION ............................................................................................................8
2.1
Unpacking .................................................................................................................8
2.2
Location.....................................................................................................................8
2.3
Supply Tubing ......................................................................................................... 10
2.4
Discharge Tubing .................................................................................................... 11
2.5
Installing Injection/BackPressure Valve ................................................................... 11
2.6
Electrical.................................................................................................................. 12
3.0
OPERATION ............................................................................................................... 13
3.1
Priming .................................................................................................................... 13
3.2
Adjustment .............................................................................................................. 13
3.3
Calibration ............................................................................................................... 14
3.4
External Control....................................................................................................... 14
3.5
STOP Function........................................................................................................ 25
3.6
AC Power Interruption (Y-Control Module) .............................................................. 25
3.7
Auto Air Vent Valve Operation................................................................................. 26
3.8
MultiFunction Valve Operation................................................................................. 26
3.8
MultiFunction Valve Operation................................................................................. 27
4.0
MAINTENANCE .......................................................................................................... 28
4.1
Diaphragm Replacement ......................................................................................... 28
4.2
Valve Replacement ................................................................................................. 28
4.3
Tubing ..................................................................................................................... 28
5.0
EXPLODED VIEW & PARTS GUIDE .......................................................................... 29
6.0
TROUBLESHOOTING ................................................................................................ 41
7.0
SERVICE POLICY ...................................................................................................... 42
Summary of Contents for EH Series
Page 46: ...Notes...
