We finally got the go ahead to do the upgrade of a dead Series 4 processor setup to QS and I'm a bit nervous about reusing old HWI keypads and am looking for any kind of tips. These are wired keypads and I will be reusing the old power supply so I have a few seemingly random questions:
1. Is the 15 volt power to the old keypads polarized (ie. does it matter which wire is positive and negative).
2. Is there any functionality loss using the old keypads? In other words, can I do all the programming I could have done with a QS keypad?
3. How much work can I do prior to getting the "upgrade code" from Lutron? Really, this is the most confusing part - I know that I need a link translator and I know I need a code, but I'm not sure at what point I need to use the code. Also, is the code tied to the QS processor or in the software? If I ever change the QS processor will I need to get a new code? Is it possible to accidentally lose the code and be required to buy another one? At what point do I use the code?