T105 is 120volt timer with NO NC terminals:
http://waterheatertimer.org/pdf/t105.pdfThe model number of timer shows inside the door panel. However any Intermatic and some GE timing mechanisms can fit into the same box, so wiring has to be checked with diagram shown in manual to be be sure.
Problem is not clear.
You are operating two different things: the filter pump and the pool vacuum?
You want the filter to operate via the timer.
And you want the pool vacuum to turn on whenever you flip a power switch, except the power switch is wired into the timer ... which means you have to flip the timer manual override lever and flip the power switch to operate the vacuum.
To work around this problem, rewire switch wires so they connect to terminals 3 and A.
Black wire to terminal 3 and white wire to terminal A.
For more information, add a comment.
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html
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