I got this transformer rated: *Input:* 110/220VAC 60Hz *Outputs:* 24VAC 
@ 2A (12V-0V-12V) and I'm nut sure how to hook it up.  I bought it for 
HVAC control power at 24 VAC, but other applications possible.


http://www.mpja.com/prodinfo.asp?number=7844+TR

The diagram on the input side, shows 2 windings, like a center tap, but 
open at the middle. Black wire to both left ends, and red wire to both 
right ends, that's a red and a black at the center. Do I connect the 
blacks together, and the reds together for 110 volts,

The output shows one center tapped winding with blue wires on the ends, 
and yellow center tap.

I understand the center tap output with my choices for +12, -12  or 24 
VAC, Am thinking for 220 VAC, I want to connect the center red and black 
together, and the outer red and black go to the 220 VAC. For 110 volt, 
do I connect the reds together to say the hot 110, and the blacks 
together to the neutral 110?

Thanks in advance.
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