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Monday, September 5th 2011, 7:47pm

too many wires

I am replacing a controller in my garage. I took the old one out without taking a mental note of how it was wired because I thought this was a simple swap-out. When I go to put my new one on I realize I have a set of +/- ac wires that I don't know what they are for. The old unit had a 24vac transformer that was plugged into a wall receptacle and there are the expected 8 colored wires for my 7 zone system. But...there is also that set of ac wires coming out of the wall next to the colored wires.

Any ideas what this could be for, I can't figure it out. They aren't hot. Looking at my old unit I can't see where these wires were hooked up, but I know they were.

The old box was Weathermatic LawnMate7, the system is about 15 years old.


Advanced Member

Posts: 67

Location: South Jersey


Tuesday, September 6th 2011, 6:18am

It sounds like the old unit had an external 24VAC power supply for the zones. Does your new controller have a built in DC/AC converter? If it does then you shouldn't need the wall brick.

What make and model is the new controller?

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