What does the HWH Reset switch do, and when should it be used? I don't want to push it by accident and have something dreadful happen.
Google is your friend. The top 2 hits:
HWH Lighted Reset Switch (http://beamalarm.com/Documents/hwh/hwh-lighted-reset-switch.html)
http://www.hwhcorp.com/ml37520.pdf