W900 Series Controller

Walchem’s online support is here to assist you with installation, troubleshooting tips, and training materials.

If you need additional support, please click here to locate your local master distributor. Walchem’s master distributors maintain a local inventory of pumps, controllers and spare parts, are fully trained to provide technical support and understand the needs of customers in their territories.

Here’s where you find quick programming guides for your W900 controller.
Print out or save to your phone for easy access!
W900 Menu Maps
W900 Quick Programming Boiler
W900 Quick Programming Cooling Tower
W900 Quick Programming: Biocide
Trying to troubleshoot your W900 controller?
Print out or save to your phone for easy access!
ORP Sensor Troubleshooting
pH Sensor Troubleshooting
VTouch Connection Troubleshooting Guide
Spare Parts drawings for your W900 controller.
Print out or save to your phone for easy access!
Controller Spare Parts
Sensor Options


Visit Walchem’s YouTube channel
for more technical support videos!

Intro to Wiring the W900
Walchem YouTube Channel

Intro to Wiring the W900