Hello all,
I have a small commercial job I am finishing, (my first restaurant), and I would like some advice about the fire suppression system. Here is what I have:
2 exhaust fans & a MUA unit, all powered via contactors (motor starters).
Simplex G. is doing the under the hood fire system and they have installed pyro-chem microswitches.
The microswitches have 3 wires:
Red/Hot
Black/N.O.
Brown/N.C.
The paper work for the microswitches says they can handle 21A 120v, so it does not look like a need a relay for this model.
My question is about the micro switches, if I run a 120v control circuit to the switches, am i supposed to run a wire from the black/N.O. to the normally open terminal on my contactor. (I want the exhaust to kick on or continue running when the fire system is activated).
I just want to make sure method is correct. I am worried about the 120v from the microswitch causing a short on the contactors, as the power would be from a different phase than the contactor control circuit.
I have a small commercial job I am finishing, (my first restaurant), and I would like some advice about the fire suppression system. Here is what I have:
2 exhaust fans & a MUA unit, all powered via contactors (motor starters).
Simplex G. is doing the under the hood fire system and they have installed pyro-chem microswitches.
The microswitches have 3 wires:
Red/Hot
Black/N.O.
Brown/N.C.
The paper work for the microswitches says they can handle 21A 120v, so it does not look like a need a relay for this model.
My question is about the micro switches, if I run a 120v control circuit to the switches, am i supposed to run a wire from the black/N.O. to the normally open terminal on my contactor. (I want the exhaust to kick on or continue running when the fire system is activated).
I just want to make sure method is correct. I am worried about the 120v from the microswitch causing a short on the contactors, as the power would be from a different phase than the contactor control circuit.