Re: smoke detectors
Don,
In most cases you are exactly right. The elevators at NHIS is Loudon NH work on that principle. There are smoke detectors installed at the top and bottom of each elevator shaft and a heat detector is installed w/in 1' of each smoke. The smoke detector tell the elevator that there is a fire and the elevator is recalled to a safe floor. The heat goes off at 195 degrees and activates a shunt trip breaker, thus cutting off all supply power to the elevator shaft. At 205 degrees the sprinkler system soaks the elevator shaft and the car inside of that.
I guess they think that it WILL work this way. I hope so, if not, the shunt trips, occupants are stuck in car, getting wet and hopefully not hot!
Jim
[ July 11, 2005, 10:57 AM: Message edited by: volt101 ]