Author: Irma Lowe (page 1 of 2)

120V 240V Electricity explained – Split phase 3 wire

– good day there guys. Paul here from theengineeringmindset.Com. On this video we’re going to be finding out how three wire splitphase electricity supplies work to get a hundred and twenty and 240 volts. We will seem at how the electrical energy will get from the vigor stationover to the property after which how it’s connectedaround the property and each and every of the important add-ons. Now, this procedure is utilized in North the usa so we are going to be making use of theirterminology and colour coding. If you are from outside this area, then that you would be able to still follow alongside but your electrical systemwill work differently. We’ve got included that in a separate video. Do examine that out. Hyperlinks are in the videodescription down below. Remember electricity isdangerous and can be deadly. You must be qualified and equipped to hold out any electrical work. So, electricity is generatedat the vigour station which is most of the time located far away.The vigour station generatesAC alternating present and is hooked up to a step-up transformer. This transformer increasesthe voltage to shrink losses and is hooked up to the grid. The grid contains high-voltage electrical energy over long distances, overto the towns and cities. As soon as it reaches the cities and cities, it is going to enter a step-down transformer that allows you to decrease thevoltage to a safer stage. From here it is going to be disbursed locally into smaller circuits on distinct streets or organizations of homes. Connected to those distribution cables will be smaller transformers, ordinarily pole-mounted whichagain decrease the voltage down even additional to a degree safeenough for residential use. On the property willbe an electrical power meter so that you can quantify how much electrical power has been used and theelectricity company will use this to bill the property. The transformer will be connectedto the electrical power metre through some cables so they can both run above floor or underground. These cables might be two hotwires and a impartial wire. Throughout the transformer wehave two coils of wire. The major coil is connectedto the energy station and the 2d coil will beconnected to the property.The two scorching wires areconnected to every end of the secondary coil and the impartial is connectedto the centre of the coil. Now, do not fear aboutthat an excessive amount of for now. We’re going to look at thisagain later within the video to comprehend it. So, if we zoom into the property, we discover a important service panelwhich is regularly called a load centre or breaker field. If we get rid of the duvet and look inside of, we first to find the main breaker. This is often on the top of the panel nevertheless it maybe at the backside. The 2 hot wires fromthe electrical power metre will connect directly to thelugs on the fundamental breaker. Coming out of the primary breakerwill be two primary bus bars. These are basically uncovered metal sheets which lift electricityto the circuit breakers. Discover I’ve proven the present flowing backwards and forwards.That is considering the fact that this is ACor alternating current. These bus bars as good asthe lugs are not insulated, they are reside or scorching. The major breaker will also be manuallyflipped to reduce the power to the whole lot downstreamof the fundamental breaker. The main breaker will alsoprovide over present defense to the property. It is rated to manage a certainamount of electrical current passing by way of it, typicallybetween 100 and 200 amps. If this worth is surpassed thenit will shuttle mechanically to check out and protect the propertyand its electrical circuits. Throughout the panel, we additionally havea impartial and floor bus bar. That is basically a stripof metallic with plenty of holes and screws in it. The impartial and groundwires will take a seat in the holes and the screws will lock them in location. On this example, we have a block on both part of the panel. As this is a important panel, the two bus bars can be joined collectively so we’ve a connector bar between them. That method now we have a sharedneutral floor bus bar. Sub panels must have their bar separated however that’s a subject matter for a separate video.From the electrical power metre, we will have the neutralwire linked to the lug on the highest of the impartial floor bar. Realize the fairway screw. That is bonding the neutralbar to the metallic casing of the carrier panel. The rationale of theneutral bar is to come the used electricityback to the transformer. It does really get a littlebit more advanced than that however we’re gonna appear at that in a extra developed difficult video, this is just protecting the basics.So, the two scorching wires willprovide the electrical energy and once it’s used it willreturn to the transformer through the impartial bar. It’s nonetheless AC alternating present but to make it easier to imagine, I’ve handiest animated the currentflowing in a single direction so you will see that the path it will take. Now, if we had been to take our multimeter and fasten one result in the bus bar and the opposite lead to the neutral bar, we would get the readingof round one hundred twenty volts. For those who do not have already got a multimeter then I incredibly motivate youto get one for your toolkit. It’s essential for any electricaltesting and fault-discovering. Links down under for whichone to get and from where. If we connect the multimeterleads to the opposite bus bar and the impartial bar, we’d again get a reading of round 120 volts but when we connect the multimeterleads to the 2 bus bars then we get a reading of doublethat at around 240 volts.So, why is that? What’s taking place right here? So, when we look at how the transformer is hooked up to the fundamental panel, we now have the 2 scorching busbars related to both finish of the secondary coil within the transformer and then we take the impartial bus bar connected to the centreof the secondary coil. So clearly, when weconnect throughout the bus bar and the neutral bar, we’re simplest making use of 1/2 of the coil. So, we are only determining uphalf the electrical voltage the transformer can provide. So, that means we get 120 volts. After we hook up with the two bus bars, we’re connecting to thefull length of the coil. So, we’re choosing up the full voltage which the transformer can furnish. As a result, we get 240 volts. If you want to learnhow transformers work, then examine out our videoon transformer fundamentals. Hyperlinks for that down in thevideo description beneath. Now, coming again to the panelconnected to the bus bar, we will have our circuit breakers.These will look something like this with is black plastic casingand a toggle change on high. The circuit breaker controlsthe drift of electrical energy into person circuits in the property. It can be manuallytripped to cut the power but it surely also has two foremost elements. The first function is overload security. The circuit breaker is rated to control a collection quantity of electrical present. When home equipment or lightsare connected to the circuit they’ll every increasethe current in the circuit. If too many matters areplugged in and grew to become on then ultimately the current shall be more than the breaker canhandle and the breaker will robotically travel to cutthe vigour off to the circuit and guard the property. The second characteristic isshort-circuit safety. When the sizzling and neutralcome into direct contact with every other, the current will dramaticallyincrease almost immediately. When this happens, itcreates a magnetic field for you to trip the breaker andcut the energy routinely. Let’s have a look athow the circuit breaker is hooked up to the electrical circuit. In this instance, we will connectto a easy gentle fitting which is controlled through a swap.We take the scorching wirefrom the circuit breaker and run this to the switch. We then run another wire from the change and over to the light becoming. From the light fittingwe have a impartial wire which includes the return current again to the impartial bus bar. We take the bottom wirefrom the metallic casing of the sealing field and the swap and we also become a member of thisto the impartial bus bar as in this case it is shared. The reason of the scorching wire is to carry the electrical currentover to the light fitting. The purpose of theneutral wire is to hold the used electrical currentback to the important panel and then again to the transformer. The purpose of the groundwire is to furnish safeguard for a fault present. If for illustration, the scorching wire came loose and touched the metalcasing of the sunshine becoming, the ground wire providesa low resistance route back to the panel. With out this path electricitycould glide via you should you touch the metal box. As the current flowsthrough the bottom wire, it could develop the current and so as to shuttle thebreaker automatically.So, the electrical energy flowsthrough the scorching wire, by way of the primary breaker,down the major bus bar and into the circuit breaker. From there it flows along the sizzling wire, throughout the change and light then again along the neutral wire and into the neutral bus baralong the neutral bus bus wire and back to the transformer. I’ve animated this usingAC alternating present however to make it easierto fully grasp the path, I’ve shown it flowing ina single path now.We have now blanketed lighting circuits in detail in a separate video. Do investigate that out. Hyperlinks within the video description beneath. Ok, so what else could we find here? Well, we would to find adouble pole circuit breaker with a purpose to let us connect toboth bus bars to get 240 volts which we will use thepower better home equipment like dryers, levels andair conditioning units. If we appear at the dryer circuit example, we run the pink sizzling wirefrom the circuit breaker which is connected to themain bus bar number two and we run this to the receptacle. Then we run our black hotwire from the opposite terminal of the circuit breaker whichis connected to bus bar one and we join that tothe receptacle also. On this case, we’ve got the neutral wire related between the neutralbus bar and the receptacle in an effort to allow us to geteither a hundred and twenty or 240 volts from the outlet. Then we have a floor wireto provide a trustworthy route for any fault current. Now, we will either connectacross the 2 hot wires for our 240 volt connection or between the sizzling wireand the neutral wire to get 120 volt connection.We will also very likelyfind a GFCI circuit breaker which stands for groundfault circuit interrupter. This may increasingly look some thing like this and relying on the model you purchase, you’ll often have apigtailed impartial wire linked to it. GFCIs are required on distinctive circuits the place shops are used forplaces like kitchens, lavatories, hot tubs et cetera. You should check with theNational electric Code for certain important points. The GFCI breaker has boththe sizzling and the impartial flowing by means of it. This way that you would be able to measure thecurrent flowing from both wires and be certain they are equal. If we took a typical outlet, we would take a hot wire from the breaker and fix this to the outlet terminal. Then we take the impartial wireand run this again instantly to the circuit breaker to aspecific impartial terminal. We then join the pigtailwire into the neutral bus bar. This will furnish the return direction. And of direction, we run theground wire from the outlet back to the neutral floor bar. If we look at this illustration,the present is flowing most commonly unless the man sticks ascrewdriver into the socket.The electrical power then flows by means of him as a substitute of the impartial wire. The GFCI is measuring thecurrent in the two wires and notices that these aren’t equal. It then robotically tripsthe breaker to reduce the vigour and store the person’s existence. We would additionally come acrossan AFCI circuit breaker. This stands for arc faultcircuit interrupter. These are required forcircuits feeding bedrooms, hallways, kitchens et cetera. Once more, assess with theNational electrical Code for targeted small print. AFCIs work also by using being connected to each the hot and impartial wires. Inside of this circuitbreaker is a circuit board which is measuring the circuit and monitoring for patterns which indicate an arc fault is going on. These are installedpretty a lot identically to how we noticed the GFCI breaker. Below ordinary conditions, thecurrent flows by way of the scorching again through the neutral into the breaker and via the pigtail andback through the neutral bar. But if for illustration, a screwwas by chance inserted very close to the cableand eliminated the insulation to expose the copper wires, the electrical energy might now potentially bounce across or arc from the hotwire and into the neutral.The arc is extremely scorching and explanations most residentialelectrical fires. As the arc happens, itcreates a particular signal in the electrical cable. The circuit breaker can notice this and can automaticallytrip to reduce the vigor. Connected to the impartial floor bar will probably be a thick uninsulated copper wire which runs out of the bottom of the panel and off to the bottom rodwhich is pushed into the earth near the property. Under ordinary situations,no electrical current will drift via this wire. Its purpose is to dissipatehigh static voltages from things like lightning. This manner the electricalsystems and apparatus is protected from harm. Additionally, we willalso find a bonding wire to metallic pipe work in the property. That is to furnish a saferoute for electricity to drift must a hot wire come intocontact with a steel pipe and this way will preventa individual being electrocuted in the event that they were to touch the pipe work.Ok guys, that is it for this video but if you wish to continue your learning then check out one ofthe movies on reveal now and i’ll capture you therefor the next lesson. Recall to comply with us onFacebook, Twitter, Instagram as well as theengineeringmindset.Com..

How to Replace an Old Thermostat — by Home Repair Tutor

Hello, Im Jeff Patterson with residence RepairTutor, and in todays video, Im going to exhibit you the way to substitute an old thermostat. Maybe youve received one thats historical andjust wishes to be replaced or youve obtained a more recent one that went kaput, just like the oneIve bought here its a digital thermostat, and it now not works after 10 years, whichis a bummer. But the good news is its super easy toreplace an historical thermostat thats not working anymore. So lets get to it. Of path, earlier than you do anything, flip thepower off to your heating and cooling procedure.Heres my historic thermostat; it turned offcause it was once tough-wired. And Im going to wire up a new Honeywellthermostat. Its RTHL2310, and its real easy. All you need to do is tilt the ancient thermostatforward and pull it off the base plate. Regularly, theres a pin connector thatholds the thermostat to the base plate along with 4 clips. When you’ve got an historical thermostat with mercury,put off it accurately. Take a photo of your present wiring. Thats going to aid you wire the brand new thermostat. But additionally, take into account of how the wires are wired. And youll need to label them with the appropriatelabels. As you’ll discover here, I labeled the fairway wirewith the G sticker.And the relaxation of the wires I labeled accordingto the old configurations. So thats why the blue wire has a W2 stickeron it. Remove the screws that hold the base plateto the wall, after which cautiously once I say carefully, I mean very cautiously holdthe wires with one hand and pull the base plate off the wall. You dont need the wires to return behindthe wall; its an actual affliction, and thats why I put a vice grip set of pliers on thewires to maintain them in situation.Drill holes within the wall that suit the baseplate, and put some blue tape on the wall to capture any of the dust. Location the blue inserts into the wall. Pound them into location with a hammer or thebase of your screwdriver, like me. Cautiously feed the base plate over the wires. And you can also ought to trim any of the wirescoming out of the wall thats what I needed to do right here. After which unscrew the small terminal screwusing a precision screwdriver. Stick the wires into their corresponding slots,and then tighten down the terminal. Get rid of the vice grip, and right here you go. Heres the wiring. I put the blue with the blue, G with the G,yellow with the yellow, W with the white, and R with pink. Relaxed the bottom plate to the wall. Eliminate your blue tape with the entire dirt onit I simply comfortably did that over the thermostat box that got here with the Honeywell thermostat.Put the batteries in. Take away the decal. And then be certain that this switch is setto both gasoline OR OIL or electric. I’ve an electrical furnace. Press the thermostat down onto the tabs. And youre almost performed. You must set the time for all programmablethermostats. Set the time. Hit the run button, and youre good to head. Now, the final thing you have got to do is setup the warmness, Off, or Cool, and then set the Fan to both Auto or On. Good, there you go. Thats the way you substitute an ancient thermostatthats not working anymore. And recall, if you happen to like this video, giveit a thumbs up over on YouTube in order that different folks can see it and advantage from all thedifferent hints. Which you can additionally click on the subscribe button. In case you like DIY movies perhaps youvegot a brand new house or an old condo thats new to you and that wishes plenty of work to it I suppose that youll like my videos because they share a ton of tremendous suggestions.All right, thanks for becoming a member of me in these days. I fairly appreciate your time. Sick see you within the next video. Take care!.

Adding zones to your HVAC system

[Music] 6:09 now imagine a home where all of the lights are tied to 1 change to turn on that switch they all come on good that’s how most homes are heated and cooled with only one thermostat well the authorities at Angie’s record say there are advantages to adding zones to your HVAC approach some rooms for your home stay warmer or cooler than others a zoning approach the combination of a zone panel thermostats and a sequence of dampeners can maintain temperatures more even say you’re asking for cooling upstairs the dampers for downstairs will shut and block off the bloodless air to downstairs after which the air conditioner will come on and all of your air will go upstairs zoning an ordinary two-story house expenditures round $2,500 the foremost time to put in a doning method is when the condo is being developed so if you are within the method of building speak to your builder and spot if it makes sense to your dwelling to zones with their possess thermostat works fine for many houses having extra zones doesn’t mean having bigger efficiency or financial savings putting in a zoning method isn’t going to make your dwelling more effective you are not gonna see it for your utility charges but what you’ll see is a much more at ease temperature in the course of your residence some men and women try to zone by closing registers in special rooms however gurus say that may sincerely do extra harm than excellent we are going to see how people shut every register within the first flooring to try to drive more upstairs but that can make the air conditioner run too cold and freeze up now Angie says most houses improvement from zoning mainly those with vaulted ceilings or a room above a storage many gigantic home windows matters like that she additionally recommends programmable thermostats for highest efficiency

eLearning Module: DriveWizard HVAC – Overview

Hello, i am Paul Avery i am probably the most product coaching engineers with Yaskawa’s technical training offerings group on this eLearning Module we will be discussing Yaskawa’s DriveWizard HVAC program. DriveWizard HVAC is a free windows-headquartered software tool designed to make commissioning and troubleshooting Yaskawa drives so simple as viable. First things first, in the event you do not already have DriveWizard HVAC be certain to download it from our internet site. It may be with ease found making use of the quest bar in the higher proper nook of the Yaskawa house page. Opt for the first search result for DriveWizard HVAC the web page the link will take you to will furnish a download program link DriveWizard HVAC is suitable with all Z1000 and Z1000U Drives and skip programs and most V1000 and E7 Drives. There is a gigantic quantity quantity of aspects in DriveWizard HVAC with that in mind, we will be able to ruin our Overview into shorter movies, every with a certain matter concerning DriveWizard HVAC. The video you are currently viewing is a short introduction effortlessly reviewing the topics so one can be mentioned. We can out with the fundamentals of force Wizard HVAC this includes insurance plan of the process requisites crucial to run DriveWizard and recommendations on putting in the program additionally the various connection ways will likely be verified including pointers for the driving force installation for the special forms of connections that require drivers.In the Programming section we will be able to explain everything there may be to programming your Yaskawa force utilizing DriveWizard HVAC. We will with studying and writing operations leading to the more than a few exporting and sharing choices moreover, you are going to be trained the pleasant technique to transmit critical parameters and screens to Yaskawa’s technical help staff. The third part will quilt Monitoring features This part touches on tips on how to access screens use customized shows investigate Statuses and also covers various tips for trending data. DriveWizard HVAC might also control the force correct from your computer.Section 4 will explain when and tips on how to make use of this device and in addition show the appropriate technique to disengage laptop manipulate of the drive and return control back to the power’s suitable manipulate scheme An foremost notion to realise is that DriveWizard HVAC operates with a database because of this parameters listed in the program are pulled from hooked up databases relying on the pressure’s firmware this will likely be discussed extra in section 5. There are some beautiful strong instruments within DriveWizard HVAC the application Wizard makes setup so much simpler chiefly for any individual new to drives also the once tedious undertaking of jumping from an older VFD generation to the most recent new release will show to be a lot less difficult whenever you acquire an working out of the Convert task instrument. DriveWizard HVAC’s support menu is explored in the final section and we will show the right way to navigate via the potent support menu. There’s various customization that may also be performed inside this menu. Finally, the software update characteristic is discussed..

HVAC Tech School: How to Read AirFlow Differential Pressure?

hi control transcommunity this is Eric Strom quits with control trends smart building and HVAC control news you can use get a lot of questions on the website about Magna hillock gages and how they work think about this way the doctor checks your blood pressure for a reason because basically that pressure allows the blood to flow from your heart through your body if you get a card you got a problem same thing with your buildings and same things with your homes if strict ins like dirty air filters or other restrictions that keep the air from flowing then you have to troubleshoot it because the tenants are not going to be happy so how do you do this well in this video I’m going to talk about a tried-and-true the dwyer Magna healing gage so check it out it’s a short video watch it to the end if you liked it please subscribe to the YouTube channel and give us a life okay so let’s look at the basic Magna heal it gage and as you can see it’s a couple things just a set of magnets it is a center that’s actually senses the differential pressure of the static pressure and then it’s a helix that winds and unwinds as the magnet is pulled from side to side you can see how this works in this particular little video clip here okay you can use these gauges in a lot of different ways typically what you’re going to use it for is to diagnose airflow problems in a unit so to do that you’d be basically putting a pitot tube or some sort of Center in the supply and one in the return and the most important thing to remember that is if you got a pitot tube number that 90-degree end goes into your airflow if you get it backwards it’ll miss your readings up okay so once you get the supply and the return hooked up you’re ready to go you can either read it directly off of the magnet hillock and essentially your equipment will have differential pressure rating that the equipment’s operating optimally at if it’s not in that range then you know you got a problem could be a dirty air flow filter or something could be clogging up your ductwork okay many many uses of this you can use it on your AC units your furnaces you can use in commercial applications too but it’s all based around air flow you’ve got to get the air flow through the system now at Strom plus we still Strom Coast combat is we still sell Magna helix it’s especially the Dwyer Magna hillock is one of the all-time greats still works really well a lot of people have popped over to the electronic ones we stock test oh and a couple of other brands that are really great same principle suffers electronic reading and now we even got to bluetooth so you can actually is your phone to do your Diagnostics okay so I will put some links some individual mag flow meters in the in the notes below so if you’re looking for a mag flow meter then click the links take you right to the Strom quest comm website alright if you like this video please subscribe to our YouTube channel and give us a thumbs up have any questions reach out in comments

If your furnace is working correctly It should do this

If your furnace is working correctly it should do some variation of this depending on brand efficiency model age etc.

Testing for Leaks in New HVAC Units

Alright, we’re getting close to the end gamehere. We’re wrapping this job up. The old unit’s tore out, the new unit’s in. We’ve got all our joints ordered. Now George, tell us a little bit about whatwe got going on her with these gauges. Well, we to make sure our leak, uh, solidjoints don’t have no leaks in em, uh, we put nitrogen on freon lines. We pressurize it up to 200lbs, we’ve had itsittin about 2 hours still at 200 so we know we’ve done the sauder joints don’t have anyleaks.This is also going to help absorb any moisturethat may be in the air since we had it open while we were doing our brazing joints. We put nitrogen through while we were brazing,but this just is, is a safety check to make sure we have no leaks. Get a little, uh, moisture that may be inthe lines to help dry it out before we hook the vacuum pump up. Nitrogen doesn’t hurt anything. It’s not gonna effect the ozone, it’s notgonna cause a fire or anything. We’re just gonna let it go and it don’t causeany harm to the system, don’t cause any harm to the atmosphere, the environment or anything,so. And we basically protected us and protectedthe homeowner.We’ve insured that number one, our six jointsthat we saudered aren’t leaking. That’s insurance, we know that our system’sright. We know number two that we know that we’vecleaned the system properly, that it’s been saudered and charged and the charge is gonnabe right. And number three is we get any extra moistureout of it. Is that correct? That’s right. Alright..

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How to check hvac refrigerant charge level on mini split DIY

okay everyone thank you once again fortuning into our YouTube channel and the purpose of this video is if you haveinstalled a mini-split unit yourself or if you have bought one and it didn’tcome with enough refrigerant or maybe while you were putting in the flaredcopper lines on the inside and you had some refrigerant leak out of the systemjust like you see in this case here it’s starting to freeze up what you want todo first is you want to make sure that your refrigerant levels are up to parand what we’re going to do is connect this blue hose with these gauges on tothe connector down below now a standard connector like this one will not work soyou need to buy an adapter and that’s what we have here and I’ll post a linkon how you can get these as well but first you want to tighten it you want touse a little wrench make sure that it’s nice and tight and then you want to goahead and put this down at the bottom so we can get a reading so we’re going todo that next okay so as you can see down here I’vealready got my adapter in there and I made sure I tightened it well not onlyhere but here as well and what we’re gonna do is you open your low side andyou can tell if you’re doing this for the first time or you don’t know how totell it’s on your low side so some gauges will tell you low and high I meanthat’s as simple as it gets but it’s basically your blue hose you connect itto the access port don’t get confused with these two things here these arejust to open and close when you’re releasing the refrigerant so if you lookin there after you take these out you’ll see that you have a space for an Allenwrench that’s not for that for for what we’re doing here this is the part andyou’ll tell because if you were to remove this inside there’s like a littlepin that looks like a tire gauge it’s a straighter pal and that’s why you’regoing to connect your blue hose to so the sweet spot when you’re measuringyour psi down here you want it to be around the 117 120 range and you can seethis is about half so obviously it needs refrigerant so that’s how you can tellif your unit is not cooling very well or if you see some freezing like if you seesome freezing up here icing up and on the coils on the inside of your unitwhen you’re running in cooling mode that’s not a good sign so in this caseit obviously needs refrigerant so we’re going to go ahead and add it and to dothat we’re going to do another video and if you go ahead and click on the videothat will pop up on the screen it’ll take you straight to that so you can seehow we add refrigerant to it

How a Chiller, Cooling Tower and Air Handling Unit work together

Welcome to Paul from engireeringMindset.com, in this video We will look at the basics of the operation of the central chilled water system It is a typical system for office buildings around the world We have a model of a basic office building just out of all the interior stuff imagine In fact, the roles will be filled with humans, computers and central server rooms It will generate a lot of heat, especially when the building is exposed to the sun in the middle of summer So this building must produce a lot of cooling to deal with this heat to maintain an ideal temperature So how is this done first we need equipment for example here there is a water cooling unit With distribution pumps And air handling unit and cooling tower on the ceiling If a water cooling unit produces cold water in this system The water cooling unit has two main cylinders.The first is the evaporator In which chilled water is produced The other cylinder at the rear is the condenser The heat from the building is collected and sent to the cooling tower In fact this is the stillness of the water cooler Here we have an evaporator which is insulated to keep cool inside Here the compressor, power source and control unit are shown. This is a centrifugal water chiller because there are many different types Which we will not go into in detail in this video We just want to understand the basics of how to cool this building If the chilled water comes out of the evaporator The pump is pulled by the pump and can also be pushed in. Here you notice the pipe covered in dark blue is coming out of the evaporator and placed dark blue to know that it is a very low temperature, the degree of exit is about 8 degrees Celsius, or 6 to 8 degrees Celsius It leaves in this design at 54 liters per second The other pipe with a light blue color to know that it is at a higher temperature of about 14 degrees Celsius or 12 to 14 possible slightly higher or lower depends on the system design and convection of the building Actually the pipes will not be colored this color They can be this color but this is unlikely, their shape in the real world will look like this as you can see here CHW chilled water Flow and chilled water returned We have a colored sticker and illustrative arrows and almost all of the equipment rooms will find a pipe with similar stickers But for illustrative purposes Cover them here so you can understand how the system works If the pump pulls the cooled water at about 8 C and sends it to an upward pipe The shape of the real pump is similar to this and is a direct coupled centrifugal pump The engine at the rear here is connected to the pump but unfortunately it is under isolation you can not see in this picture The chilled water is sent upward in the upstream pipe in this pipe With the height of the building And branch out from the ascending tube to feed the air handling unit The shape of the air handling unit in real life is similar to this.This is an example of a small unit. Here we have the flow back from the cooling or heating coil and I will explain it in moments And here we have a file for heating and another for cooling I’ll talk about them next If the task of an air handling unit is to take warm air from the office Pull it through a fan and pump it to the other side To distribute it through the ducts to different points that you need inside the office In the air handling unit there is a thermal coil and in fact its shape resembles this The chilled water enters the coil and looks through these little rings here And graduated from the top here Enter at 8 C in this example and when you reach the top you will leave the coil at 14 C If this rise in heat because of the air that passes in the unit handling air to cool If warm air enters and passes on the coil, the coil moves its coolness to the air and the air conveys its heat to the coil Air leaves at a lower temperature and water leaves at a higher temperature The air handling unit can be one in one or more or it can be one here and the air duct connects to a number of roles and this is only for illustrative purposes to help you understand This “check” water cooler returns to the rising pipe to feed the evaporator of the water cooling unit in the bottom Inside the water cooler is a separate system that rotates between the condenser and the evaporator and also the steering blades below This is a cooling cycle that occurs inside.What happens here is that the heat inside this pipe is removed by the cooling fluid And sent to the condenser to get rid of its heat to go to the cooling tower. Inside the “water cooler” looks like this, we have one hand “evaporator” which is the coldest side “Intensive” destination here And also “compressor” with “steering blades” at the bottom If the “cooling fluid” flows inside the system here, it conveys heat from one side to the other in continuous flux We have other videos on the cooling cycle if you want to learn more check them out So the heat inside this pipe here was transferred to the “condenser” side. The “condenser” sends this water – now called condenser water – to the cooling tower Here I covered this pipe in red to know that the temperature is higher In this example about 35 degrees Celsius Its flow rate is about 58 liters per second in the direction of the “cooling tower” above This can be changed This represents this design only for illustrative purposes And here we have the return water of the condenser in this example about 28 degrees so when going to the cooling tower and its return lost 7 degrees here in this design but in the real world can not be so high In winter, the difference will be much lower Yes, in the real world, the condenser pipe is like this I apologize, not this, this pipe “see” the water cooled disperse that he will write here condenser water and some of the signs and other colors I apologize for using the wrong image If warm condenser water is sent to the cooling tower on the roof of the building In this example it is an open cooling tower which means that the condenser warm water enters the cooling tower as a spray This spray drops down into the cooling tower and is collected at the bottom The air flowing in the opposite direction flows through these fans here These fans pull the surrounding air out of the building into the cooling tower and pull it out from above In this process warm condenser water will lose some of its heat and the air entering and leaving the cooling tower will come out at a much higher temperature than it entered It will also carry some humidity if its relative humidity will also rise A real cooling tower that looks like this from Baltimore Aircoil.This is a typical cooling tower that can be found on the roof of many buildings. And just to give you an idea if you’re not familiar with the cooling towers, This is New York City and you can see approximate all buildings have cooling towers of a certain size or another and some have more than others this depends on the size of the building and indoor activity They are on the roof of any large building, in almost every city around the world So when the cooling tower water is lost about 7 degrees in the cooling process it is collected at the bottom and then sent down Into the condenser pump and pump into the condenser In fact I have put this pump wrong here Obviously the exit should be the other side but this free video if @ #% ^ $ 🙂 So here is where the condensate water returns to these coils inside here to carry more heat and is sent back to the cooling tower It is important to know that the condensed water system and the cryogenic water system are completely separate and inactive It does not exchange water between them, but is the cooled fluid is what works in the cooling cycle Among these units it is the only thing that moves between them The water here is sealed inside the pipes and leaves for these pipes Also in this example we have one stomach, one mechanical In fact, it is unlikely that you have one equipment, probably n + 1 So n is the number you need plus one Because if this pump is broken, this pump is broken.We cannot generate cold water or condensed water. So at least we will have two units, one working and one on standby, if only one equipment is working They will take turns on the service, the first pump will work for a week and then the other will work for a week and so on This also allows you to perform the necessary maintenance of the system In large buildings you will have a much more complex system. You can have two, three, four or more water coolers. More air handling units and more or larger cooling towers The complexity of the system depends on the convection of the building You may even have a number of separate chilled water systems that you can have for critical places For example, a system supplies server rooms just because they need cooling around the clock You will also have these common central systems that deal with the heat of the place in the roles This is a very initial look and we will go into more complex systems in the next videos Thanks for watching and I hope you watch other videos .

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