To his credit, my PB finally changed out my IC40, which based on prior post a couple of weeks ago, was probably undersized or malfunctioning (I could never get any chlorine reading at all unless I left it on 100% for several days in a row).
At my request (and based on some feedback from this forum), although he still felt that the IC40 should be adequate, he installed an IC60 in it's place. However, since installation about 5 days ago, the red flow light goes on anywhere from 8 to 49 minutes after startup of my pump when it is on low speed (I timed it several times). The flow light is green and stays green if it is on high pump speed. The IC40 always had a green flow light on low speed up until the moment it was removed and the IC60 installed.
The IC40 and IC60 have identical listed flow requirements, so this doesn't make sense to me. If the IC40 had adequate flow on low speed, the IC60 should as well. Also, why would the flow light stay green for 30 or 40 minutes or longer, indicating adequate flow, then change to red? It would seem that if flow wasn't adequate, the flow light should turn red immediately after startup on low speed.
The only potential problem I can see is that the pipe leading into the intellichlor is directly off a "U-turn" (2 90 degree turns separated by about 10 inches of pvc) in the PVC- it is only about 2 inches from the turn to the inlet of the IC60, rather than the recommended 12 to 18 inches of straight pipe. However, this would not explain why the IC40 flow was adequate on low speed while the IC60 gets a red no flow light. The location/configuration of installation has been the same for both Intellichlors.
To me, it looks like I got another bad Intellichlor which needs replacement or at least a new flow switch. What do all of you think? Any comments or suggestions? Thanks in advance.