When to replace a commercial pool chemical controller

Chemical controllers do not usually fail all at once. They become unreliable, unsupported, and invisible, and the cost shows up as staff time, chemistry excursions, and risk. These are the signs that a replacement should be in the capital plan.

Seven signs

• The model is discontinued and replacement parts or probes are hard to source.
• No remote visibility: the only way to know the pool's chemistry after hours is to drive there.
• No alarm notification, or alarms go to a person who has left.
• Repeated probe replacement without stable readings, suggesting an electronics or flow-cell problem.
• No data logging, so you cannot show the health department or your own management what happened last Tuesday.
• The controller cannot interlock feed with flow, or the interlock is bypassed.
• Only one person knows how to operate it.

Planning the replacement

• Start with an assessment of the whole loop: sample line, flow cell, probes, feed equipment, and chemical storage. A new controller on a bad sample line is a bad controller.
• Define what you want to see and control: pH and ORP only, or free chlorine PPM, alkalinity, flow, pressures, inventory, VFD, UV, heater.
• Decide who receives alarms and how, and who can change setpoints.
• Check whether the change triggers plan review by your permit-issuing official (10 NYCRR 6-1.8); your engineer and FreyTech can advise.
• Schedule around the pool calendar and plan for training of current and future operators.

FreyTech's system assessment produces a documented recommendation for a staged or complete upgrade. Request one from the contact page.