HVAC lab, Basic wiring for heat, Contactors and sequencers

I was tutoring several students with basic wiring this week so I made this video for them to review. If you where not in class this may be confusing. It is long and dry but covers some of the basics.

[@josephberry5997]

My instructors don't teach they show you tube videos. Thank you for making me a better at what I do.

[@love2hvac]

I'm sorry to hear about instructors but I'm glad you have the drive to learn and I overcome obstacles. The drive to learn and understand will always pay off. Keep that up!

[@adamedwards2435]

File a lawsuit for the return of the money they scammed you out of.

[@PremierBuildingService]

You are the reason I’m passing my hvac course thank you for making these videos

[@love2hvac]

Thank you, I appreciate the feedback and I'm glad I can help.

[@levimust4479]

Clearly a seasoned instructor. Specifics and underlying principles. Excellent class. Thanks.

[@dreadthelionheart]

I learned more in this video than 2 months in HVAC school... thanks

[@OlFaithful]

Quite possibly the best explanation on the entire internet 🙏

[@ping_me1vp]

This guy is an excellent instructor, he has very positive energy, explains clearly without any bull shit. This would be really great for these new lids coming into the field, an instructor like this is worth a million dollars

[@ricmadthesilverslayer9281]

This way of teaching helps waay more than the class I learned in

[@keithbailey7535]

Don't blame class lol! Just. Jiving

[@surumaantipas2376]

What a great content! Thank sir for clearing all my doubt.

[@prasadkhawas2844]

What a great explanation. I was struggling in my motor control class, how all these components works and create a ladder diagram. This is a great help to understand all the logic. Thank you so much.

[@bplevine1]

You're an excellent instructor. This puts some more of the pieces of the puzzle together. Thanks for sharing your expertise.

[@georgesharrizon7293]

you're a great teacher sir , a magnificent educator. I wish every teacher just like you !

[@love2hvac]

Thank you George! That makes my day

[@richardomclean227]

i live in Jamaica and start watching your channel about week now and take note Learn a lat. i just want to say keek doing good for the world

[@dustyduds3953]

Outstanding instruction! I was struggling with wiring a rotary phase converter and this tutorial cleared up my confusion with powering my contactors through the low power side of my transformer. Thank you!!!!

[@acrservicesmathewr7565]

This is an amazing demonstration. Love how simple and clear you demonstrate the flow of AC current. I get confused in the field wiring diagrams but you have made it easier to understand. And how you need to be 100 percent correct to prevent fires. Always be sure with the wiring diagrams. Thank you Ty

[@alexisdavis164]

I’m amazed at how awesome this is explained. It’s very very very important to understand these diagrams in order to be able to diagnose!

[@estevanorona9079]

Great instruction, nothing like knowing the theory of operation to enhance your troubleshooting skills! Having the passion for teaching makes it easy!

[@mcesar85]

I thank you so much for the time you take to show us how it is, very simple instructions, I love it!!!! I’ve been trying to find the right video on how the sequence of operations work on an electrical heater and you NAILED IT!!!!

[@hvactech5829]

Your video is crystal clear of instruction and super informative. Great job as always, THANK YOU!

[@rayli2330]

Thank you very much for the great video. Just took a HVAC electricity class, but didn't have a chance to actually wire because of no school. Your video pretty much answers most of my questions I had. Awesome video! Thank you!!

[@ramchillarege1658]

You are a fantastic instructor. Thank you for an excellent tutorial.

[@tomasalcantar2972]

You did great teaching this. I was able to comprehend easily and learn so much from you. Thank you!

[@pctuterman1]

You are an awesome instructor. You really make learning easy.

[@EdTube444]

I recently got my 608 certification and then did a class on electrical heat. My instructor was awesome. But that was very specific to a particular system. As we all know improvisation is when you really know what you are doing and can do it safely. This is THE BEST VIDEO SERIES I HAVE EVER SEEN! And I have see a lot. Great job! Thumbs up and subscribed.

[@jayR0191]

Great job teaching I’ve been learning so much from your videos

[@otisjohnson9651]

Excellent instructor!

[@niazahmadaziz8979]

thanks for your hard work. your teaching style are incradible

[@aladincarpetcleaning6416]

I recently stumbled on to this channel and the video learning is amazing! Easily understood for the beginner or professional. Wish all teachers had the same demeanor and flow for learning. Great job!!!

[@hadkeenbair480]

Your videos is real helpful. Keep up the great work sir

[@professorkiwi]

This is soooo awesome!!! Good refresher and reminders. Thanks!

[@alexv3866]

Great, thank you for your hard work at explaining!

[@hg2.]

Fine teaching video. Am making connections with the other in-the-field videos.

[@dallasjurgens4112]

You are a great teacher with a wonderful style. You seem like a kind and patient man. I have learned a lot from you. You deserve a Like and Subscribe from me and I wish you the best for the future.

[@jgomez35728]

Thank you very much for uploading. Your videos are very helpful.

[@abdelilahchichou2412]

Geat video, very nice and clear explanation, I really like it. Thank you.

[@dukerob1973]

You’re A GREAT TEACHER. Thanks man

[@kevaughnmorrison379]

I am from 🇯🇲 u are a good instructor

[@jasonoak4564]

This is gold. Should have way more views.

[@officialmultie]

This is an Incredible video man! Thank you so much

[@DocHolliday86]

Short and straight to the point. Hell yea

[@saraabodian1687]

Your video are very useful appreciate your efforts thank you

[@agaligabenjamin596]

You are a great teacher.👌👌👌

[@johndavidson5564]

could have saved nine months of class time if i had seen this video in 2015

[@larryherbert4317]

thanks Ty for another great video. I am working my way thru them!😎

[@love2hvac]

I will be doing an entire electrical series in order soon!

[@eddiegomez3628]

Awesome demonstration

[@jamesshiota7249]

Great video! Helped me a lot!

[@jawedhasan6195]

Great explanation👍👍👍👍👍👍👍👍 Thank you very much❤️❤️

[@enyce28live]

Great ! Thanks. Very informative!

[@rolandovargas5149]

👍👍👍👍👍 No se porque Google me recomendo estecanal pero es una de las mejores I don't know why Google recommended me this channel but it is one of the best

[@love2hvac]

Gracias por ver mis videos, me dio mucho gusto saber que los disfruto.

[@muneebshah7617]

Rapid Oxidation 🤣 ( Great Explanation Sir! )

[@adamedwards2435]

My training in school on wiring electrical circuits was the instructor passed out a schematic. Pointed out where the hookup wire was and wooden cane. That was it!

[@love2hvac]

Oh thats sad. I have the class go one wire at a time untill they have the basics. Then I give them other wiring diagrams for them to apply what they learned. All about steps

[@marcoselgaucho1106]

Awesome vid! Thanks

[@karimmecherfi5346]

My respect to you sir you are wonderful explaining electrical diagram easy and professional manner I have just a comment I’m not trying to teach you here sir I’m learning from you and subscribed to your channel I think it was a moment you were unplugging the wires off the contactor you forgot to turn the power off safety first just for safety always first and one more thing I would like to mention here with my fellow students many technicians they think they are electricians and keep missing with the electricity even if the work on electrical components because as you know they to have acknowledged about the code and many other things doesn’t even know what the wire size and what amperage has to use for that wire and so on I want conclude this for technician should stick for what he learned as a tech to deal with units not as electrician I was trying to share this with my classmates students thank you sir and marry Christmas to you all

[@love2hvac]

You are 100% correct! Keep up the good work

[@karimmecherfi5346]

Ty Branaman I really do appreciate that sir thanks for replying

[@dlssimpson594]

Great Job Explaining!

[@love2hvac]

Thank you

[@thomasbowden3746]

You're the greatest!!

[@yoelsitico]

Very very good explanation thanks you

[@butlerstouchHVAC]

great explanation

[@robertsmith2956]

I jumped 240 volts to the 24 volt heat pump reverse solenoid. You never heard a stuck valve pop open so hard in your life, and the SMOKE...... Got another two seasons out of it by adding a momentary on push button to case for when it stuck again.

[@keithb6817]

New to the feild started hvac class in may

[@jaimemoncada7237]

que buena explicacion

[@syedbasheer8210]

Great...thanks

[@hg2.]

Thank you!

[@pedrojardim1163]

thanks very useful appreciate

[@pedrojardim1163]

thank u ----that helps alot

[@reginaldsotero]

you're the man !

[@evelyn367]

superb video 100% legend

[@jaimehernandez5688]

Thanks you very much!

[@aarondelauder8196]

thank you!

[@MrBrix3]

Excellent Thanks....

[@getemjohnny]

Awesome video. Can we get more like this

[@love2hvac]

I plan on an entire electrical series. J I'm just super behind schedule

[@frankcloskey7789]

Another thing is important, one wire at a time when changing out parts . . Wiring is critical knowing how it works. You cant go wrong. 3/18/21

[@exoticprincess8831]

Nice work

[@khemistri351]

Am I the only one that felt the cool breeze, when he turn that fan on😮

[@phillichillin1716]

Honestly man thanks so much for this. Learned a fuck ton! 👌🏾

[@jeanfrancois7470]

Thankyou for your time

[@love2hvac]

Thanks for watching!

[@jimanders6666]

thanks !!!!

[@dumptrks]

Great Video Ty! Just a suggestion adjust camera if your going to draw out of frame or show a piece of equipment

[@love2hvac]

Thank you. I did not even think about being out of frame. Haha sorry about that. National technical Institute Henderson Nevada has recorded my complete set with a professional videographer . They have an online and a fusion online/hands on course that is 1000 times better than this. Thanks for watching and the suggestions help for next time.

[@dumptrks]

@@love2hvac do you offer more advanced classes or just the basic theory?

[@love2hvac]

@@dumptrks we have a variety of classes. Install class, Campus HVAC class 4 months long Local fusion class Online fusion class where all the theory is done online and then campus is a one week 6 days of 10 pluss hours a day of lab only work. We have a online theory only course for people already working in the field. We are creating some advanced specially courses for people with field experience. We have a goodman/amana build a tech program The school was just approved to offer a plumbing course. With more on the way.

[@peyvandmanavipour396]

hi thanks for sharing your knowledge with us... but i got a question, why do we use a fuse on our low voltage? what does that do? and what happens if we dont use it.... i am trying to use a heat lamp to warm up a coop and i was planning to use a thermostat, and this is a very big help. thank you

[@love2hvac]

The low voltage fuse is going to protect the transformer and protect the low voltage wiring from becoming a heater and catching fire in the event of a short. Low voltage shorts are verry common.

[@OlFaithful]

Thanks!

[@love2hvac]

Thank you so much!!!!!

[@EhsanFarahmandzadeh]

very nice explanation

[@love2hvac]

Thank you!

[@haroldcouch4168]

Hey Ty that 1st demonstration both lightbulbs came on so they were never two separate circuits

[@mrnacirema4280]

God bless you ❤

[@HsingSun]

Thank you for your video. Question: If the cooling system keeps running, does Sequencer relate to cooling functions?

[@yanslabrada8904]

thank you

[@sizzytop39]

hey great lesson, ive got no issue with what you covered. But one thing i do need cleared up is with heating stages.. say your home has 2 thermostats, 2 zones, one is calling so it initiates that first stage of heating, turns on the respective elements etc. what I can't grasp is how the 2nd thermostat engages the remaining elements... because both thermostats just come into the unit and terminate from there and use the same switching components, what turns the remaining elements on in that full call for heat where both levels of the home are calling for heat and all elements get energized? looking forward to hearing from you

[@love2hvac]

If you use a 2 stage thermostat it will have a W1 and a W2. W1 would power the the low voltage load of one sequencer that would close and pass power to say 2 heat elements. If the temperature of the room drops below 1.5 or 2 degrees of the set point it will close and energize W2, that would wire to the second sequencer, that would close and control another 2 heat elements. There are many way to wire this. Many use a single stage thermostat and only 1 (w) will power all the sequencers at once. Or you can have a 3 stage that can power 3 different sequencers individually

[@andrewthacker114]

Excellent teaching. Thank you. So the sequencer brings on the indoor fan during heat cycle , I was thinking the sequencer only brought on the heat .

[@love2hvac]

It depends how it's wired. Some manufactures used the sequencer to bring on the heat and the fan and others used the thermostat to bring the fan on with "g" get imal to energize the fan relay and the sequencers only operated the heat elements. I will be recording the entire electrical series soon. (Hopefully)

[@andrewthacker114]

@@love2hvac thanks, I’ll look out for it, I’m a refrigeration guy, so my AC needs brushing up.

[@juliusthewarrior4063]

new subscriber here.

[@raulortiz1964]

Good morning , first of all I like to say that your HVAC videos are very helpful to me. I'm currently in the HVAC program through Bates Technical College. Our first project was to make our initials out of copper by soldering and brazing it. My Question to you, is it possible to use "Neon" on my frame to make it glow green? if so how would I approach that? Ortiz

[@love2hvac]

Anything is possible with enough time and money. It would be much easier to use some LED lighting or LED light strips%tube strips. With christmas here it may even be easier with a larger selection available. If your set on neon here is a link to help you build your own. lifehacker.com/make-your-own-diy-neon-sign-with-el-wire-and-plastic-tu-1786774719

[@perrymichaelgraphics]

If I wanted to construct a board similar to this what all would I need to put this together

[@GamingwithGamerGirls]

L1 & L2 are typically used for voltage over 120.

[@love2hvac]

Electric furnaces represented here are 208-230v. Teaching it as L and N while technically correct for the lower training voltage causes confusion when the students get to the live furnace.

[@gerardomatias9758]

Great teaching 👍 , I do have a question about some contacters is there a way to show you something that I'm trying to do ?

[@love2hvac]

find me on linked in and we can communicate from there

[@1weirddoe571]

With the sequencer, why would turn the elements and the fan turn off at the same time, because there is residual heat, so why wouldn't the fan stay on for another two minutes let's say?

[@love2hvac]

It is possible to wire it in a way to do just that. Theybtypucally done because customers do not want to feel a draft of "cold" air. When the element shuts off the temperature would very quickly drop. Also there is little heat to regain, only seconds worth. A gas furnace is much different and requires that off delay.

[@clevelandtaylor5809]

I am trying to build this exact same board for instructing my students. Is there any way you could put the items you used in the description? Especially how you built the makeshift termostat. Thank you very much for your informative video. I have subscribed to your channel.

[@love2hvac]

I will see if I can find a list

[@getemjohnny]

Any good books you recommend on electrical troubleshooting? I can’t wait for more of the electrical videos

[@michaelcostello6991]

What is the purpose of the on delay and off delay of the thermal relay. Does one heater come on first and then the second heater and fan ? It looked like they both came on together in your panel. Thanks

[@love2hvac]

You can purchase them at different times intervals. They reason is to spread the load out. The fan should come on with the first heater and off with the last heater. You have a great question. When I remake the electrical videos I will be sure and discuss this. Thank you.

[@michaelcostello6991]

@@love2hvac Thanks. I could not remenber what i had read in the past about this.

[@raulortiz1964]

Good evening, I like to say that your Basic wiring for heat, Contactors and sequencers is great video. I am on my 6th HVAC quarter and I must say I am Not the greatest with basic wiring and schematics at all. Bates tech does not offer a class on schematics. Where can I take a class like so to enhance my knowledge in general? Ortiz

[@love2hvac]

I'm in the process of making videos for schematics. It's just taking a little bit longer than I expected.

[@RC-Heli835]

Hey Ty! Hey on a real system should the 24V common of the transformer be chassis grounded? You wouldn't believe how hard it is to find the answer to that question.

[@love2hvac]

There is no requirement. My opinion does not matter, as the equipment gets a UL rating for either way that I chose so I CO back the way it was. It's alternating current so the electrons are moving from R to C with 24v of pressure then back from C to R with 24 v of pressure changing 60 times a second. When the C is grounded the case becomes part of the circuit. Personally I don't like that and it gives really weird reading when troubleshooting. But again my preference does not matter. I can say that c can be grounded but it is not the same as ground. Imagine if the house used ground instead of neutral, electricians would loose there mind, but it seems to be 1/2 normal for the 24v system to do that.

[@RC-Heli835]

@@love2hvac Ok thanks for responding man! Your years of experience is very valuable!😀

[@almighty_rza8085]

Where can I get those electrical blocks your plugging the wires into?

[@ricmadthesilverslayer9281]

Probly home depot or a specialty store

[@love2hvac]

I will ask my lab assistant tomarow

[@emailfilters]

30:06 - Aren't the heat strips supposed to de-energize before the fan, so the fan is still blowing the residual heat through the ductwork?

[@love2hvac]

On electric heat, typically no because it ends up being a "cool draft" complaint from the customer. One manufacture added a time delay on the fan for a few seconds for effecency. Some new ecm motors accomplish this as the motor ramps down. The air in the duct traveling approx 720FPM. We are talking seconds. With a gas furnace we want to run the fan for effecency as there is still a lot of heat energy traped in the heat exchanger. The second reason is to cool the heat exchanger. This is why the much longer and usually adjustable fan off delay on a gas furnace.

[@randytrivette6618]

I just had a really high power bill…Two months ago the blower motor quit working indoors ..I had a company come out and they installed a new sequencer , and Evidently wired it so every time the blower fan comes on the heat strip comes on ..Even if you run fan only the Air handler was pulling 22 Amps at the panel box…so the heat strip has been running saveral hours a day for the last two months …what did they do wrong??? I had a different service tech from a different company come out yesterday and he figured out the sequencer or time delay relay was wired wrong ..he put in a different one and everything works fine..

[@love2hvac]

That will do it! Horrible for the electric bill, great for dehumidification. Now was the unit still cycling on and off? If it was then its grossly oversized

[@randytrivette6618]

@@love2hvac I don’t think so, it’s at my daughters house and she has been complaining about it always running,,, alsoI did call the HVAC company that wired it wrong and sent him pictures and he called today and said that he feels bad and is going to pay the difference in the power bills for the last three months

[@love2hvac]

That sounds like a great company. Everyone makes mistakes it's how we handle them. Good news

[@Abdulrahman_Hi]

Remember guys: "A switch is a switch is a switch" !