I put a newer electronic coin acceptor in an old air machine. To make this work I added a simple 120/24 transformer to power the acceptor. I took its 120 volts off the timer, but when I measured its secondary, only read 14 volts AC. So I thought, well I just got a bad transformer. I replaced it with another new one and read 120 volts AC going to the primary. Well I still got 14 volta AC out the other side. There are times when I'm sure there are aliens hovering somewhere above just to see how dumb they can make me look. Can anyone explain this?
Please tell me how this is possable
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Ghetto Wash
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Thought 1. The transformers I use are 120/240 to 24. Do you have it wired like it was 240?
Thought 2. Did you put the transformer in parrellel with the timer and not in series?
Thought 2. Did you put the transformer in parrellel with the timer and not in series?
soapy
Senior Member
Are you sure that you have a full 120v coming in? I would put a volt meter on it to confirm.
Reds
Member
I had a similiar problem once and it went away when I wired a ground direct from the contactor coil that I was having trouble with to the 24v ground terminal on the transformer. That fixed it. I am not electrically inclined. I was just grabbing at straws and this seemed to fix the problem.
The transformer is a simple one with only a 120 primary and a 24 secondary. I measured the voltage going in, 123 volts ac, and measured the secondary with no load at 15 volts. It is wired in parallel with the timer.
Could it be possible you have 2 mismarked transformers? Sounds like they have a 240v primary. If they are they from the same manufacture, can you try a different brand transformer? This is an interesting one that I want to know the answer to.
This happened to me when I finished installing my SFR system that the Previous Owner had started to install. He had the panel to the SFR wired into 110v when it should have been 220v. What keyed me into tracking down the wiring was when I measured the output of the 24v transformer. I was getting 14v. Sure enough, after looking at the schematic and tracking the line back to the breaker box, it was wired into a single pole breaker. Luckily he never fired up the system. Wouldn't have been good on the 220v pump....
This happened to me when I finished installing my SFR system that the Previous Owner had started to install. He had the panel to the SFR wired into 110v when it should have been 220v. What keyed me into tracking down the wiring was when I measured the output of the 24v transformer. I was getting 14v. Sure enough, after looking at the schematic and tracking the line back to the breaker box, it was wired into a single pole breaker. Luckily he never fired up the system. Wouldn't have been good on the 220v pump....
2Biz you win a cigar on this one. Although I ordered 120 to 24 vac transformers from Grainger, they gave me 240 to 24, and the label is soo small I didn't notice it. We,, even us "experts" can have a duh moment. Sure wish I would have read that label before I posted here.
