wiring 2-speed pump with T104 + T106

mjc123

Well-known member
Jul 20, 2018
114
Halifax, NS (Canada)
Pool Size
18500
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-15)
Hey all, wondering if anyone else has a T104 + T106 setup and/or has any experience wiring these timers. I wired it following this guide: How to wire Intermatic T10604R with the addition of an SWG connected to terminals 2 & 4 on the T104.

I'm no electrician, but I like to think I have a working knowledge of our residential split-phase power system, and I understand how circuits work. Intuitively, I can trace the circuits and they make sense to me - and yet, when I flipped the switch, the pump did not sound happy so I immediately shut it off. I'll troubleshoot it more when I get home this evening, but if anyone has any ideas as to why this might not work, I would love to know.

My specific wiring diagram is as follows (which I have quadruple checked). I have tried to color-code it somewhat: clocks are light/dark orange, main lines are red or blue, jumpers are green and the two motor speeds are magenta or turquoise. Please note I have left out the ground wires to keep it less cluttered, but they're there!

As an initial troubleshoot, I tried re-drawing the circuit using the individual wiring diagrams for each of the two timers, using this one for the T106:
http://waterheatertimer.org/images/T-106-control-208-277V-4-40.jpg retrieved from How to wire T106 timer

With that, I came up with this instead:

However, when I trace the circuits, although laid out slightly differently, they appear to do the same thing and I think are both correct.

In the meantime, I'm going to isolate the motor and try re-wiring it the way it originally was to confirm it still works properly, and go from there
 
123,

Your first diagram appears correct to me..

The second one has power on A which I would not do..

As a test, I would wire direct to the pump for just low speed and see if it worked, and then again for just high speed and see if it worked..

Jim R.
 
As a test, I would wire direct to the pump for just low speed and see if it worked, and then again for just high speed and see if it worked..

Jim R.

That's exactly the plan, and I'll use the original wire that I know was working (it was a 14-2, which I replaced with a 14-3 so I could have all 3 leads). I just hope I didn't fry it or something this morning when I flipped the switch. The breaker didn't flip so I don't think I did a direct short, but it definitely didn't sound happy.
 
I suspect that that might be the issue. Maybe common is on the wrong terminal?

I've checked it several times. Unless it's mislabeled on the motor itself, it should be correct! Heading home in the next hour or so - doing some troubleshooting is the first thing on my to-do list
 
Ok, took longer to get to than expected (13 month old to blame) but here’s the update:
1) pump runs fine as originally wired: wired to L1 and L2/Common (i.e. high speed)
2) pump does not run on low speed (wired to A and L2/Common. It simply makes an electrical hum like a transformer
3) for the heck of it, in case common was mislabeled, I wired L1 and A (high to low, no common) and it made the exact same “humming” noise

For now, I’m just going to essentially remove the T106 from the picture and simply wire the pump through the T104. I’d like to figure out why low speed doesn’t work though- any ideas?
 
Do you have a picture of the pump label and the wiring in the pump?

Pump labels (incidentally, I couldn’t find any info on this particular model- all the online documentation skips this particular model #):
And


Original wiring before I touched it:

After I changed the wire out for 14-3 (currently the red wire is disconnected):

I took the white plate off and checked that there were no lose connections but didn’t get a photo
 

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