5 - Fan Shutdown and Door Release off One Panel Relay - Introduction to Fire Alarms
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- Опубликовано: 4 окт 2024
- I'm explaining how fire alarm systems work for new technicians or other employees who deal with these systems. This is my 5th video in a string of many Khan Academy-styled lessons. This video introduces trouble contacts on an FACP and also reviews alarm contacts. I show how you can use an external relays to control multiple building functions even with only one onboard alarm relay.
Another amazing video. This information is such a big help to everybody. Its great when an intelligent person like yourself is both willing and capable of transferring your technical knowledgeable so clearly and easy to understand. Thanks Michael
instablaster.
I've been SOOO wanting to know how to wire nacs from a relay and I've never found a video on it until a couple months later (today) I used my brain for once and typed in "fire alarm panel replays". Thanks, Joe!
just again to say many thanks for taking the time to make these numerous videos,,,which you do not probably know how much they help people with a thirst for knowledge ,,,,at any age,,,many thanks ,,,Stormin
Thank you very much for the videos...It is a very detailed explanation of the Fire Alarm System. Just what I needed.
Thx bro, i really appreciate your videos. Greeting form Venezuela
Don't steal in new york please
Thank you for your explaining
Thanks for the video, it helps a lot.
thank you for you videos , you helping me a lot
Thank you very much..I finished this series and it was very helpful and informative ...although of I don't understand last video well 😅..but it was very helpful...
What shoot I watch next in your series 🤔
Very helpful videos !
I believe the hot from the fan supply should go to your common, but nice video!
Joe your videos really help me a lot. After one year watching all i am back to refresh my acknowledge about this fire system. I never saw any more from you in you tube. Did you retired from made videos here.
Thanks for the kind words. I'm glad they've helped you. I haven't made any videos in a few years and I don't really have a good reason. I haven't ruled out making more but I really haven't been motivated to recently.
Please make more videos related to it thanks
Thank you!!!
Thanks 🙏
hello Sir joe, new sub here i really appreciated this output ... how about an HVAC if fire occurs then aircon will shut down do you have any video or tutorials for this i mean the diagram how to connect into the panel
Thanks for your efforts,
One question please, Suppose I have one normally open relay to turn on a fan in case of alarm, In normal condition, the fan is off because the circuit is already open, So how can I supervise this circuit if the wire is cut in normal condition?
In theory you could wire the relay so it's always powered up, then run one leg of the fan circuit through the contact of the relay that's open when the relay has power. That would make the relay fail safe. If something happened to the wiring going to the fan relay, the relay would change states and the fan would start. You could then take it a step further and put a power supervision relay on the power circuit that runs the fan to supervise that portion of the circuit.
What software are you using
hello sir thank you for the vieos i think u made a mistake with the fans ...first of all the hot wire should go to the commun then it leaves the relays from the NC so when the relay is activated it opens and stops the fan from sppining again thank you so much
On this style of relay it's labeled out of the box. So in other words, NC is closed until the relay gets power. At that point, NC is actually the open contact, and NO is closed. Wiring to the NO contact when and keeping the relay powered makes this a fail safe circuit. I know that can be confusing.
Hi Sir this is WAQAR ALI from UAE,
I am fire alarm and fire fighting engineer,
Sir can u help me for the connection of Zone control valve , means how to interface with panel, and 2nd is wiring for repeater panel to main panel......
Please
Thank you,
I have some videos on how sprinkler valves are tied to an alarm panel.
Shouldn't the door and fan relay be NC since you want the circuit to be complete (door open and fan running) under normal conditions?
Justin,
At around the 5:30 mark in three video I explain that once that MR-201 relay gets powered up, its contacts change states. At that point the NC contact opens and the NO contact closes. I emphasize it again at the 7:30 mark because I can see how it could be confusing. the relays labels apply to the state of the relay out of the box, with no power applied.
Yes, seems like he was mixing up NC/NO a bit
Patrick, no I wasn't. When the MR-201 gets power, the coil picks and NO closes. That's important to understand.
You are right, my bad! I was the one mixed up.
Please pA system interface send vedio
Can you tell me how to wire up a damper shutdown without 24v and using the 120v?
Alex, you need to use a relay you can control, like an MR-101 or equivalent. Then run the damper through the contacts. It might be helpful to watch the video on elevator shunt trip. That shows how to control an MR-101 using the power you're controlling (in your case, the damper power). Be careful though, it's easy to screw up and you don't want to damage your panel.
@@JoeKlochan can't we use a Rib realay too?
By the way YOU ARE AWESOME I LOVE YOUR VIDEOS! I learned so much and made me just understand fire alarm way better.
Yeah, as long as it's rated for the current.
@@JoeKlochan Hello thank you for educating videos they are very professional.I have one question. If the fun that we want to shut off is connected to the distribution board what is the procedure to trip the breaker that the fan ia connected to.
On a voice evac it would be cool if it said "A trouble conition is present at... " Adressanle I mean
That can easily be done on modern systems. I've never seen it required or desired.