You need the Engineer code to change the programming. Bit involved, but I can tell you how if you have the code. Otherwise you could wire the immediate zone you want to change, in parallel with a timed zone - often zone 1 is timed.
Dave
December 2007
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home alarm systems.