switch to fire suppression run in parallel?

[baronson]

Microswitch for the fire suppression system to be wired through a 2 pole switch, Switch to be able to turn exhust fan on and off manually. Microswitch to turn on EF automatically when fire suppression system is initiated.

My question then is how exactly am I wiring this? Does the hot feed directly to the common of the microswitch, then the NO lead to 1 pole of the EF switch and the switchleg to the other pole of the switch? It doesn't seem right..thoughts?

 

[augie47]

Here is a previous thread that should help:
http://forums.mikeholt.com/showthre...ood-and-exaust-supply-dilemma?highlight=ansul

(with credit to Larry Fine)

 

[LarryFine]

(with credit to Larry Fine)

Thanx!


Simply speaking, you can have the microswitch activate a 2-pole contactor whose poles are in parallel with the 2-pole switch.

You could have the (usually) two microswitches parallel the 2-pole switch directly, if you don't need either for anything else.

 

[earlejohnson]

Here is a previous thread that should help:
http://forums.mikeholt.com/showthre...ood-and-exaust-supply-dilemma?highlight=ansul

(with credit to Larry Fine)

Very cool post. By the way Ive been doing some Mc Ds lately all there new equipment has the shunts built in to it, no more shunt trip breakers needed.