TABLE OF CONTENTS
Thank you for choosing a Walchem E-Class metering pump. This instruction manual deals with the
correct installation, operation, maintenance and troubleshooting procedures for the EW and EK 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 ............................................................................................................ 7
2.1
Unpacking ................................................................................................................. 7
2.2
Location ..................................................................................................................... 7
2.3
Supply Tubing............................................................................................................ 8
2.4
Discharge Tubing ...................................................................................................... 9
2.5
Installing Injection/BackPressure Valve ................................................................... 10
2.6
Electrical .................................................................................................................. 10
3.0
OPERATION ............................................................................................................... 11
3.1
Pump Operation & Programming ............................................................................. 11
3.2
External Inputs & Outputs ........................................................................................ 13
3.3
Adjustment .............................................................................................................. 16
3.4
MultiFunction Valve Operation ................................................................................. 17
3.5
Auto Air Vent Valve Operation ................................................................................. 18
3.6
Priming .................................................................................................................... 18
3.7
Calibration ............................................................................................................... 19
3.8
AC Power Interruption ............................................................................................. 19
4.0
MAINTENANCE .......................................................................................................... 20
4.1
Diaphragm Replacement ......................................................................................... 20
4.2
Valve Replacement ................................................................................................. 20
4.3
Tubing ..................................................................................................................... 20
5.0
EXPLODED VIEW & PARTS GUIDE .......................................................................... 21
6.0
TROUBLESHOOTING ................................................................................................ 32
7.0
SERVICE POLICY ...................................................................................................... 32
