Here's a link to a PDF of a compatibility chart for timers & programmers by Invensys - it has pin-out wiring information for many timers...
http://www.heatweb.com/pdf/Invensys/Programmer%20Compatibility%20Chary.pdf
You don't mention your timer/programmer/bolier or any details of the mix up you have - I hope the chart may be useful to you...
Peccavi, April 2009
