Author: Irma Lowe (Page 2 of 2)

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 .

David Weekley Homes 2-Minute Tip: Changing Your HVAC Filter

Hi, I’m Maintenance Max and this is your2-minute Tip. Today we’re going to give you a few tipson changing your HVAC filter. Changing your filter is a simple yet necessarytask. You should change, clean or check your air filters on a quarterly basis.You can set up maintenance reminders on your personal buyer site at myDWhome.com. Be sure you select a filter with a Merv rating between Merv 8 and Merv 11. A clogged filter can slow air flow to your system and damage the fan motor. Thismeans that your air conditioner cannot run as efficiently as possible and itwill result in a higher energy bill. Excessive damage may render your airconditioner completely inoperable. Filters are generally located in a largemetal grill assembly in a hallway or ceiling. They will look larger andslightly different than the air registers found in other rooms. The grillwill have a swing down door that will allow you to access the actual filter.You can release the swing down door using the small plastic or metal tabs oneach side.Some filters can be located in the air handler unit in your attic or ina mechanical closet or room. These filters will be accessed through aslide-out assembly. If you have any questions about accessing this type offilter please contact our Warranty Service Team for assistance. Once youaccess the filter, simply remove the old filter and replace with a new filter.Many have an arrow on the side that indicates which way the air should flow.Always point the arrow up or toward the furnace. The filter for your fresh airsystem may also be located in the same return. You should check this filteranytime you are replacing the other filter and replace as needed..

What is the Starting Salary for an HVAC Technician

Hey folks, what is an HVAC techniciansstarting salary? Thats what we are going to discuss todayon Fox Family Heating Air and Solar. IntroIf this is your first time watching our channel, please click the subscribe button. If you click the bell next to it youllbe notified of all of our new videos as its released. The first thing you need to know is, in thetrades like HVAC if you have a great personality, are clean cut, responsible, will get to workon time, and not drink alcohol or smoke weed on the job, youll probably go far in hisfield.Its a job that will keep you fit and strongbecause your carrying, lifting, pushing, squatting, climbing all around during your shift! Its also a job that never seems to be thesame day in and day out, which is what I absolutely love about HVAC. So, The US Bureau of Labor Statistics saythe need for HVAC techs is going to grow by 15% until 2026. At the same time there is major shortage ofblue-collar workers to fill those HVAC spots. Why is that? Is it because our parents have been tellingus since day 1 that we have to college and get a degree if we want to make somethingof ourselves? I think that might be it actually.Since my childhood growing up in the 80s,I have definitely witnessed the increase in white collar jobs out there. And those jobs today most likely need somesort of degree. I get it. However, I think the Baby Boomers and GenerationXers are making the push for that kind of thinking in their children. A mindset that has almost ignored the factthat we still have to flush toilets, turn on the heater, and sometimes fix our appliances,or run pipes for sprinkler systems. All jobs that do not require a college degree. Not only does it not require a college degree,but you wont have a crazy $15,000 college tuition to pay for when you do finally geta job. Skilled trades are acquired. Handed down from generation to generation. In my opinion, HVAC techs learn the best fromon the job training.Nothing substitutes learning out in the field. For those of you thinking about going to tradeschool, thats fine, but here I am and I didnt have to go to trade school. Now, one thing you need to keep in mind aboutHVAC technicians is there are so many types of HVAC jobs. I would say, Service techs, installers, andmaintenance techs are the HVAC jobs you probably think of the most when you think about gettinginto our field. But warehouses, need workers to supply thosetechnicians with the equipment they need. So maybe youd like to get into HVAC andwork in the distributors warehouse. You name a brand of HVAC equipment and thereis probably a supply warehouse in your area that carries that equipment and all the partsit needs for servicing. Your probably going to get a $10 to $15 anhour job working in the warehouses, but hey, you wont be crawling around attics either! In California we have Title 24 Techniciansthat act as a third-party verification technician who comes out at the end of all our jobs andverifies proper return air, refrigerant charges, andduct leakage.These guys are making hourly rates like $12.00plus they get a monetary bonus for each actual job they test. These guys are making good money, but theydrive to hell and back all over the state trying to get to their next job to make thatmoney. Looong days during the busy season, and shortdays of work in the slow times. Another HVAC job is Home Performance.Technicians deal with the whole house performanceand try to get existing homes to perform better for their customers by sealing up air gapsand penetrations to make the house less leaky. These techs usually work off commission. They are salesy type technicians selling aconcept of home performance. And the jobs they sell promise lots of rebatesfor the customer and a good salary for the technician. Ive already told you guys this, but whenI started out in the HVAC industry, I was 35 years old and had just left my job as abartender for 15 years where I was making really good money. Around $75,000 a year. But for me it was time to get out of thatindustry and move up to a real job. Because I was a mechanic in the Air Forceback in the 90s, I already knew I had an inclination for the mechanical field.Working with tools came pretty natural forme. So, I found my first HVAC job at one of thebig companies around here. The advantages of starting at a company likea bigger company, are steady work, for one. As an installer I was literally installingevery single day. It was grueling hard work sometimes, but Iwasnt at home sitting on my butt either. In 2010, they started me out at $10 an hour(pauseand stare) but I knew if they saw my work ethic, I wouldget a raise soon. And I did! I got my EPA and my 410A certificates whichgot me an extra $2 an hour, so within a month I was already at $12. A few months later, after they saw my workand how dependable I was, they gave me another couple dollars an hour which brought me upto $14. I was working for the install department at the time and had just been bumped up to $16 an hour beforeI started asking to go into the service side of the field. Well, my install manager wasnt having it.Instead she offered me a position as leadinstaller, running my own jobs for another $2 an hour. So, after one year I was making $18 as anHVAC technician. A couple months later I got up to $20 an hour. And maybe even on to $21.00 an hour. But naturally, my inclination was to moveover to the service side where most techs want to work. In order to do that my company made me goall the way back to $14 an hour so I could prove to them I knew the service side. So, once again I just had to keep workinghard and proving myself to get back up to about $18 an hour before I quit and startedmy own company. The crappy part of working for big companiesis this company had a ceiling of $25 an hour which is barely higher than the national averageof 22.00 an hour for HVAC techs.But take my technicians for example, theymake 20-27 an hour have opportunities throughout the day to make extra money on system add-onsthat we really think will help the system last longer and be safer for our customersfamily. They also sell complete systems while theyare out in the field. If a system is sold by those techs they geta percentage of the sale. In our case its 6% of the sale. Our techs love that big pay day when it hits! And now with us installing solar, their salestickets are getting bigger and their commission on a 20,000 solar sale on top of a 10,000HVAC sale really starts adding up. We currently have a tech that is getting readyto propose a 78,000 dollar job to a customer of ours for over 30kW of solar.If it sells, hell make over $4,600 commissionon just one job. Thats crazy! But back to when I started. Even when I got to $20 an hour, I knew I couldntgo any higher than $25 at my company. This is eventually what made me start lookingoutside of that company and onto bigger pay. So, thats just my story. So many technicians before and after me willhave a different story about how they got into the field and everything. And their starting salaries were probablydifferent than mine, probably higher starting pay for sure! I know of techs who started working at thestate for 18.00 an hour plus full benefits. But for the most part, HVAC Apprentices workersstart in the field around 16.50 an hour. On a national scale, the highest paying areasfor seasoned techs are the District of Columbia at $32 an hour. Alaska, Hawaii, Illinois, and Connecticutare right at the $30 an hour mark on average. The states with the highest number of newopenings for HVAC mechanics and installers are Florida, California, Texas, New York,Arizona and Nevada. If you are coming into this field green, youmay need to start at the bottom and work your way up.This is the best way anyways because thenyou get to learn how your new company does things instead of trying to break you of old habits you may have learned at another company. Once again, its called the trades for a reason. And – Its a learning process. Well guys, good luck and stay with your dreams. I told you about the lack of techs in thisfield because I want you to be armed with that knowledge as you negotiate your pay.I mean theres always people out there whowill take your job and do it for less. But its a rarity someone wants to workas hard as an HVAC technician. Thanks for watching, and well see you onthe next video!.

Five Most Common Problems With Air Conditioners HVAC Heaters Indoor AC Fans

Allright today I wanted to go over the five most common problems with air conditioners say you’re going to turn you’re air conditioner or heater on on cool or heat and the car and you lower your temperature down and let’s say nothing happens. The unit does not turn on the blower in turn at all first thing you want to check is the burners it can be a barrier breaker you often have a condenser breaker and then an offender to the fan himself these people here for the fan. So make sure your burners are oncoming dial. Sometimes if they do tripped they will travel halfway, and when you reset it you need the breaker to turn all the way off and then the crusher turns all the way back. Next thing to look at is the door switch Often there is a service by switch on the air conditioner heater unit it’s usually right here what you want to do is order press left to see if it will get that switch involved. So if you have it on heat or cool and motor already.There are many times what the problem will be Sometimes you may need to add a screw. Like this one a screws were added to make sure it was held in place. Or you can lock the tape from the door. If you add a screw you want to make sure the screw is not going to penetrate anything. Like any pipe or anything like that like a refrigerant hose behind it that you want to make sure you pick a spot which is good, and you don’t want a screw that is too long you don’t want to put it in anything it is not supposed to.Okay number three most common problem with air conditioners. So one we had Called an offender, two, the service by switch. The third most common cause of a non-working air conditioner Is open here when it comes to hatching sometimes Let’s say it is not unsafe it is this is like a mailbox bolt that Hooks the door in place and If that came open and it hatches fall open A lot of times that happens, your evaporator coil will freeze in a block of ice So, while you are there you are filtering and your filter makes sure you have a good air flow that a lot of the times that will happen are that will turn around a block of ice and you won’t even be able to pull the air filter off of it what you want to do is come over here to your thermostat and just turn cool down and just turn up the home fan so the fan turns up and down and put the switch down here in the way you can defrost the air conditioner and you also kind of want to look to make sure you condensation line does not overflow get built up with too much water from the ice melt something like that keep an eye on it, but keeping the fan up will help melt the ice faster and dry everything you know comes back to normal it take a while and ashes you will be able to put it to cool and motor again and you will close the door again and again if you need to you will add a screw or you can add some tape to make sure its held in place and do not open up to you again. Number four most common problem with HVAC heaters and air conditioners is a fan car that will not start. Often you can just replace the fan starts capacitor. I have a video showing you how to do it, “First thing to try” before you just walk out and the place of the car is to try to replace it the fan starts capacitor and it’s not really a start cap it’s actually a run cap but replace that capacitor that capacitor helps get the fan going And give it that initial kick to start without it can’t start it will just sitting there and humming and sometimes you can even start printing it with a pen or something you know “very careful” And the fifth most common cause of loss of your heating or air conditioning is a faulty thermostat so you can click on to my video on how to fix a faulty thermostat. In any case, these are the five most common problems with heating and air conditioning that you will come across what gives you call a new call or heat, and I have videos on everyone so you can check them out.I will try to fix the links here or correct on this video so you can Click on those to watch. And that’s it the five most common problems with the indoor side of HVAC heating and air conditioning. .

Best AC Company in Phoenix Scottsdale AZ [HVAC Warranty Tip]

I’m very excited to have back with us today,we have Chris Hays with Hays Cooling & Heating. And tell us about your company. We were a small mom and pop shop that we started in 2001. We’ve grown to quite a few employees. I was going to say, look at you. We’re expanding. You’re all grown up. Yes, getting older. You’ve taken off. Okay and some of the stuff I know people,constantly I’m telling people, get your either air conditioner or heater serviced. Mainly the AC, because people wait until it’sway too long and then all of the sudden you know it’s forget it. They do, the other thing is that even witha new system you still have to maintain those new systems per the manufacturer warranty. Do you really? Yes. Okay so, I maintain mine, so I didn’t knowthat but I at least keep up with mine so we’re all good.They are starting to check and they are lookingat the records now, so they are coming back to us and asking us for the records and ifthe records aren’t there, they aren’t going to cover the warranty. Okay, and so if someone does have a problem,besides the fact that they do need to have you come out and do the maintenance, or justkind of maintain it. But if they do have an issue with somethingcan you guys come out and say okay, yes this needs to be replaced or yes, we can just fixit. Does it kind of go that way? That’s exactly what we’re good at and if yoursystem is older there’s a great promotion going on, 0% for 48 months and up to $1,000in an instant rebate from Hays Cooling and Heating. Get out, okay.Partnered with Trane. Well, that is fantastic, and we just loveTrane. Yes. Okay, so people can just give you a call andjust figure out what they need and you’re going to help them. That’s what we’re here for. I like it, well thank you so much for joiningus. Thanks for having us..

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