Re: Power cut if temps are too high

[Mel Beckman <mel () beckman org>]

Most EPO “mushroom” buttons can be wired either NO or NC. 

-mel via cell

> On May 27, 2019, at 3:27 PM, Brian Kantor <Brian () ampr org> wrote:
>
> I was assuming the EPO trigger is a circuit that is normally OPEN
> and is closed when the button is pushed.
>
> If instead, it is a normally-CLOSED circuit, then you are correct,
> you would want two thermostats that both OPENED when the temperature
> rose, which would typically be HEATING thermostats, not AIR CONDITIONING
> thermostats.
>
> Either method could have been installed; in the computer room I
> worked in, the EPO was a normally-open circuit that closed when you
> hit any one of the buttons placed around the room and at the exits.
>
> Or indeed, if the fire suppression system triggered.
>    - Brian
>
> > On Mon, May 27, 2019 at 06:10:49PM -0400, Brandon Ross wrote:
> > > On Mon, 27 May 2019, Brian Kantor wrote:
> > >
> > > A simple air conditioner thermostat wired to the EPO switch.
> > > For safety, wire two thermostats in series so BOTH have to trip
> > > before power is shut off.
> >
> > Admittedly it's been a long time since I worked with basic circuitry, but 
> > wouldn't wiring them in series cause the circuit to be interrupted if 
> > EITHER thermostat tripped?
> >
> > -- 
> > Brandon Ross                                            Yahoo:  BrandonNRoss
> > Voice:  +1-404-635-6667                                        ICQ:  2269442
> > Signal Secure SMS, Viber, Whatsapp:  +1-404-644-9628     Skype:  brandonross
> > Schedule a meeting:  http://www.doodle.com/bross