shunt trip breaker please help stuck here

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amgelectrician

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hey guys i am stuck on this shunt trip breaker install.
i have a 20 amp GE shunt trip breaker that is to be connected to a make up air fan for a ansul system.
here are my wires. i have 2 wires from the microswitch on the ansul brown and red, NC relay , i have 2 wires that come down from the fan itself black and white. i have two black wins coming from the shunt breaker and one terminal on the shunt breaker for a wire to be attached, i also have a separate 15 amp breaker on the ready for the connection and i am so lost its not funny can anyone please help me out with the wiring to make this correct.
 
Confirm the "coil"(trip) voltatge on yoru shunt trip breaker (likely 120v but worth verifying)
Connect the fan motor to the normal "load" terminal of the ST breaker (add a switch if desired)
The contacts on the Ansul are a switch leg. Connect one Ansul wire to the shunt coil in the breaker, the other Ansul wire to a 120v source and the remaining shunt wire to the neutral.
 
augie47 said:
Confirm the "coil"(trip) voltatge on yoru shunt trip breaker (likely 120v but worth verifying)
Connect the fan motor to the normal "load" terminal of the ST breaker (add a switch if desired)
The contacts on the Ansul are a switch leg. Connect one Ansul wire to the shunt coil in the breaker, the other Ansul wire to a 120v source and the remaining shunt wire to the neutral.
Click to expand...
yes 120 volts
 
augie47 said:
Confirm the "coil"(trip) voltatge on yoru shunt trip breaker (likely 120v but worth verifying)
Connect the fan motor to the normal "load" terminal of the ST breaker (add a switch if desired)
The contacts on the Ansul are a switch leg. Connect one Ansul wire to the shunt coil in the breaker, the other Ansul wire to a 120v source and the remaining shunt wire to the neutral.
Click to expand...
there are only two wires coming out of the shunt
 
That's the shunt coil..one connects to neutral, the other to 120v from the ansul switch.
The shunt breaker coil is a "light", the ansul is a "light switch" wire accordingly./
 
augie47 said:
That's the shunt coil..one connects to neutral, the other to 120v from the ansul switch.
The shunt breaker coil is a "light", the ansul is a "light switch" wire accordingly./
Click to expand...
i am still confused if i have two wires coming from the ansul system which are for the relay and two wires for the make up air fan and the to wires from the shunt thats six conductors. can anyone draw this out for me or bring it in laymen terms, I've never been so stuck before.
thanx
 
I guess that is what the 15 CB is for?

the ansul contacts must be NO and close on alarm/discharge

probably an on/off switch in series with the fan
verify cb is a shunt trip and not an under voltage

if only ansul nc available need an interposing relay
relay is energized normally and holds nc open, when ansul opens relay drops out contacts close and activate shunt trip
 
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yes i have the relay already in the ansul box two of them one n/o and the other n/c I'm just having a hard time figuring out where my neutral goes from my fan i mean its gotten me so defeated today i am so stressed because there is an inspection tomorrow at 2pm and ill be at the restaurant with my co worker another electrician who is beyond confused at 5am i just hope i get it before then
 
amgelectrician said:
yes i have the relay already in the ansul box two of them one n/o and the other n/c I'm just having a hard time figuring out where my neutral goes from my fan i mean its gotten me so defeated today i am so stressed because there is an inspection tomorrow at 2pm and ill be at the restaurant with my co worker another electrician who is beyond confused at 5am i just hope i get it before then
Click to expand...

then the first sketch is correct
 
i have a 20 amp GE shunt trip breaker that is to be connected to a make up air fan...
Click to expand...

You sure about that? Normally an Ansul discharge kills the EXHAUST fan, lighting and any receptacles under the hood and the gas valve. The makeup air fan remains on.

Also, how are you going to provide a switch for workers to turn both fans on and off?

-Hal
 
hbiss said:
You sure about that? Normally an Ansul discharge kills the EXHAUST fan, lighting and any receptacles under the hood and the gas valve. The makeup air fan remains on.
Click to expand...

The Ansul kills the Make Up Air and keeps the exhaust fan on, that way the fire suppressant gets sucked up into the hood and clears some of the smoke but no new air is added to the fire.
 
ActionDave said:
The Ansul kills the Make Up Air and keeps the exhaust fan on, that way the fire suppressant gets sucked up into the hood and clears some of the smoke but no new air is added to the fire.
Click to expand...
Correct

Roger
 
hbiss said:
You sure about that? Normally an Ansul discharge kills the EXHAUST fan, lighting and any receptacles under the hood and the gas valve. The makeup air fan remains on.

Also, how are you going to provide a switch for workers to turn both fans on and off?

-Hal
Click to expand...

Not to mention the thermal override on the exhaust fan to turn it on in case they forget...:eek:hmy:
 
amgelectrician said:
hey guys i am stuck on this shunt trip breaker install.
i have a 20 amp GE shunt trip breaker that is to be connected to a make up air fan for a ansul system.
here are my wires. i have 2 wires from the microswitch on the ansul brown and red, NC relay , i have 2 wires that come down from the fan itself black and white. i have two black wins coming from the shunt breaker and one terminal on the shunt breaker for a wire to be attached, i also have a separate 15 amp breaker on the ready for the connection and i am so lost its not funny can anyone please help me out with the wiring to make this correct.
Click to expand...
OP's shunt trip breaker is for the make up fan. Note you must also shut down all the cooking appliances under the hood if the ansul system is actuated, you may need relays for this or additional shunt trip breakers on those appliances - all triggered by that same switch on the ansul system. If it is all gas appliances - the system may already have provisions to shut off gas valves, then all you need to be concerned with is make up air.
 
thanx guys

thanx guys

thank you to all who helped me through this ansul inspection, it passed and now i am working on another system to control both make up air and power to the outlets under the hood, quick question , do i need a separate shunt breaker to control both devices or being that i have two micro switches can i use the other to control the outlets using the same shunt breaker, if so how the heck does that work.
 
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