Thank you so much for these videos. I struggle to pay attention, my mind will wander constantly as the instructor is teaching. These videos help me focus. Watching, listening and taking notes helps me retain the information better. Plus, I get to rewind when I become distracted. Thank for taking the time to educate me!
Some of the best explained info ive ever heard. Thanks so much for the careful consideration of " wording"/ terminology because its very easy to become complacent of wording leading to a total misunderstanding of functions for those who are wanting and trying to be good techs but that are just not quite there yet. Great job guys!!
you said a mouth full there my friend i am 66 and retired for a long time ,,,,,i always said everything can depend on HOW A TEACHER explains certain things ,,,they can understand it well OR cause a big f,,,,ing mess LOL ,,,,,enjoy the new year
We need a troubleshooting sequence to figure out what went wrong with heat pumps, besides typical operation sequence. Like with furnace operation. Trace what's supposed to happen, and find the defects. Like stuck or worn out reversing valve. What would you see, how would you know? What would your pressures be like?
wow ! nice review for this retired old man lol ,,,,,,well done guys ! now in 2020 first day ,,my heat pump is running in north florida ,,,,,not like miami or ft laud here at all for just little over 4 hours away ! thank you
Really help I use to always wonder how did the heat pump work, but it’s amazing how the coils make that switch. 3 main things that he spoke was reversing valve defrosting board the common suction line how they rotate depending if it heat or cold air
when the system goes into defrost it simply goes back into cool mode with the fan cycled off so the head pressure can go up and then a signal is sent to the indoor board to turn on the heatstrip so it can warm up the cold air while its in defrost. And the main reason you want to have a high head preasure is so the hot gas can melt the ice around the outside coil.
Here in Colorado, heat pumps are usually connected to a furnace for a dual-fuel setup because NG is far less expensive and efficient compared to heat strips. If you buy an efficient enough heat pump, it will be less of a problem or requirement of NG furnace. But I love my Bryant Evolution Heat pump and high-efficiency Bryant Evolution furnace. The cost of electricity is skyrocketing but our solar panels produce plenty of power during the day to run the heat pump completely.
Hello, I am wondering what the drawbacks would be to putting the compressor in a shed? Specifically an uninsulated 8' x 8' x 9' open eaved (32 sq ft of open soffit vent)) building on an 8" concrete slab. This would be in a 95% heat situation but in very high humidity. I am thinking of all the corrosion, leaf/needle accumulation, as well as snow. Since the unit is just coated steel and the fins are so close together avoiding having them foul up would help the unit's longevity immensely. This is a 17' line set that I have another two layers of insulation over the top of the original. i started it up two days ago (45 degrees night and day 100% humidity) and am seeing a lot of condensate coming off the bottom of the casing which has a drain installed leading outside. I installed it up off the floor about two feet on a wood shelf with 4x4 legs drilled into the concrete. The issue is it makes enough water to keep the wood soaked and a puddle on the floor (although that drains out the door it will be an ice rink in the freezing weather). I am hoping to protect the unit from the wind and rain/snow that accumulates here in a temperate rain forest and coastal winds. I have found the plastic drain fitting is proud of the bottom enough to always have a layer of cold condensate in the bottom which condensates on the bottom side of the bottom in a major way. I am thinking of spray foaming between the shelf and the bottom with low expansion canned foam to stop this happening? As the temperature outside drops I can't see it doing anything but becoming a block of ice building up from the bottom? What are your thoughts? I have not found this addressed anywhere else. Thanks. Doug
Can this be used with an existing heating/cooling system i.e. existing furnace/AC kicks on in extreme cold/heat otherwise heat pump is on? Also does system have a backup so it works when power goes out?
The evaporator is referred to as the indoor coil and the condenser coil as the outdoor coil to eliminate confusion, indoor fan, outdoor fan... when d3aling with heat pumps.
Thank you for helping educate people who have to know EVERYTHING due to corrupt tech companies who only want to sell units and not repair. There should be a law. I went through four last time I had an issue and finally fixed with blower motor instead of $6500 replacement. Those liars are killing your industry.
It's all fun an games until an untrained homeowner gets electrocuted since they neglected essential safety procedures prior to working on the system since they became an HVAC guru via CZcams over night....
@@factfactory575 No one suggested DIY on HVAC, or other major systems, or even tolerating unlicensed repair guys. But since most 'servce calls' and 'repair techs' are just salesmen, it's good to have knowledge to find the right, licensed guy (one who doesn't carry or sell systems).
Hi, I just want to leave rough in lines in my new construction for now between air handler and outside heat pump unit. Should I leave just two half inch copper lines or do I need anything else. I will leave two 5 conductor low voltage wires and ac wiring as well. Also do I need to insulate those copper lines?
I have an 8-year-old Bryant 213B heat pump & Bryant gas furnace. This morning (at 35 degrees outdoors) I upped my thermostat from 64 to 69 degrees. The heat pump and furnace fan came on and ran for just a couple of minutes. Then, due to the call for 5 degrees of heat all at once, the Aux gas heat was initiated which makes sense. I heard the gas burner fire up and the vent pipe got hot. My concern is this: I could hear that my heat pump was still running. I learned that the 2 units (HP & gas furnace) should never run at the same time. I suppose it could be that the HP is possibly running in a different mode, such as defrost or possibly in some way that would not be harmful, but I don't know. So, I immediately dialed back the thermostat to shut it down. I don’t know how to confirm if this is a ‘dangerous’ situation or not. I don’t know if the heat pump is supposed to ‘run on’ in some otherwise safe mode temporarily. I am afraid that if I let it run on just to see if it eventually shuts down I might do damage in the meantime. The fact is that it may have been doing this all along but since I installed a new thermostat recently I am being hyper-vigilant now. I am very confident that my thermostat wiring and setup is correct. I would feel better if I knew that the HP is supposed to behave like this under these conditions. Can anyone comment on this if you happen to know?
in the indoor unit we have two coils and a directional valve? One for cooling and one for heating? Or Is there one and the same element that performs two functions?
Yes and No. The reversing valve only selects the direction of the refrigerant once it leave the compressor. For heatpump mode It simply sends the liquid to the outdoor coil so It can absorb heat there then takes the heat to the indoor coil and a fan blows the warm air into the conditioned space.
Does the compressor run during the Heat cycle just like during the Air Conditioning cycle? Will the electric consumption be just as high in the winter as it is in the summer?
I installed a Carrier heat pump system a few months ago. Heating and cooling functions are fine so far. But there is a wild constant humming sound from the bottom of the unit (transformer?) when the system is not working. Is this normal? Thanks.
Just graduated HVAC trade school and have a buddy that's having an issue with his outdoor heat pump unit. Says he hears his outdoor unit run randomly in cool (lives in las vegas about 70 degree weather currently). He noticed it because his unit is right next to his bedroom. Thermostat is set to off the times that this has happened and the said he didn't feel any air coming out of his Vents. Told him to check for any schedules on the thermostat and there was none aside from it already not calling for it because the tstat is off. What are some possible things that can cause this. When I went I didn't see anything out of the ordinary and it happens randomly.
Great explanation, but isn't this a long way round just to say that the system swaps the coils, and bypasses the expansion valve that is not in use? Then it has a back-up electric heater inside and a fan-kill option outside to get the coils hot enough to defrost. I was hoping for an explanation of some of the engineering, I guess, like if the suction line is still larger, what effect does that have coming off the compressor in heat mode, etc.
I like how he just starts off saying most of us know this then glossing over it like we already know lol my dude we're here watching this video because we know almost nothing.
No point in learning about a heat pump if you don't understand how a AC unit operates first, that would be the first step. He really should have mentioned that but this content is for their students, not really directed at the public.
endothermic and exothermic state changes through the manipulation of pressure. three way valve position determines the direction of flow. Come to Canada boys, we'll get yall learned up. those valves are called suction and liquid line service valves by the way.
Took me a while to understand that the heat pump is also the reversing Valve. I was looking for an actual pump or anything like that until I got my thoughts together
Hi my name is Jose I am from Los Angeles ca I watching your videos and I loved but you never told about water source heat pump please if you have any time to talk about water source
I always thought heat pumps made a lot of sense to me, the system literally is pumping heat... it takes heat from either inside or outside and pumps it from one space to the other
Jesse....you're awesome. Just one minor detail....please allow me to remove the "bar code sticker" (@ 9:39) from your shirt collar so you can be all comfy....
I assume that you are talking about the air handle or furnace. Yes, as backup or emergency heating, there can be either gas fire or electric elements that can be in place.
Yes some heatpumps are equiped with 2 or even three ways to heat. In the HVAC/R industry me call them dual-fuel or multi-fuel systems. Ive seen one with heatpump for primary , electric for back up, and natural gas for a third source. Ive also seen pellet fuel burners on ground source heatpumps. Its all in what makes economical sense.
COOLING CYCLE is a just cycle in a HEAT PUMP SYSTEM HEATING CYCLE orREVERSE CYCLE is just another cycle in a HEAT PUMP SYSTEM HEAT PUMP is any SYSTEM that allows you to capture energy from point A and take it to point B as that happens through a thermo-dynamic process we call this energy heat In the end of the day HEAT is only a label that we use to talk about energy so whoever is listening to us understand that we are talking about energy transference in a thermo-dynamic process There are many other language traps in HVAC like “cold retention” and so on.. They have been around for decades!
I think "taking heat from outside air" confuses people. The heat transferred into the house comes from the compression. Outside air just needs enough heat to boil off the refrigerant in the outdoor coil.
@@HVACS the refrigerant evaporated from the outside air is still below 40. Cool vapor prevents overheating from the compressor, right? Heat of compression will be about 100-120, right? After the heat exchange in the indoor coil, air from the register around 90. Not confusing temp and heat as latent heat isn't really a factor in heating mode. I'm no professor, but you need enough outside heat to boil in the outdoor coil. All sensible heat should come from compression, no?
The term "heat pump" originates from physics and thermodynamics. "Heat" = thermal energy, thus even environments that feel cold still contain heat. It's "cold" to us humans, because we have limited ranges of temperature we tolerate and like to live and feel comfortable in. Thermodynamically, heat will flow from where it is higher to where it is lower: - in the absence of some force/energy opposing that flow - and if there's a path for that thermal energy to flow What are some of the things that oppose/slow down that flow? Thermal insulation is one. Physically, they're ways that increase that flow path thus slowing down the overall heat transfer from warmER to coldER. Another one is a heat pump, a system that opposed that thermodynamic flow, pretty much at the cost of energy (adding heat to the larger overall system). Air conditioners, refrigerators, even furnaces (in a sort of roundabout way), are all heat pumps. ACs are easier to conceptualize because people already understand what they accomplish (even if vaguely). They're just fixed in the direction in which they pump heat, which is why ACs aren't used in the off-seasons. A heat pump, as in the appliance, is thus "just" an AC that can operate bidirectionally, pumping the heat in either direction as well. If you took a small 5k btu window ac unit and flipped it around in the winter, you could have a really poor man's "heat pump" (appliance), in effect "air conditioning" the already cold outdoors even further. Purpose-designed heat pump appliances are accomplishing the same with some additional components, and likely design + engineering so that coil systems can serve as both condensers and evaporators. In the summer, it costs energy, in the form of additional heat to the net thermodynamic system of home indoors + outdoor environment, to effect a cooler area such as a home. But in the winter, this works in our favor, outputting more heat than energy that is put in, because the difference is heat being taken from the colder outdoors.
Engineering-wise, there's more to it. ACs aren't generally designed to cool the cool side to below ~60F because they're for human comfort, so they are heat pumps designed for efficient operation in that temperature range. A refrigerator is a heat pump designed to cool down to lower temperatures, below freezing in the case of freezers, partly due to the heat pumps used, partly due to also having an insulated box. A heat pump (appliance) has to be able to efficiently extract heat from an outdoor environment that's potentially closer to that of the refrigerator than that of the above AC example. So not only is it more versatile an appliance in that it's usable during both heating and cooling seasons, it also needs better engineering for the reversibility of heat pumping direction but also for extracting heat in colder temps during the heating season. This is where features like Hyper Heat come in.
Thank you! Great info. Looking forward to more.
I really appreciate Jesse taking us inside the condensing unit. Really helped me demystify where the lines are going once they're ran inside the unit.
Moved into a new-to-us house that had this system, from a home with a gas furnace, and had no clue how it all worked... now I do! thank you!
Thank you so much for these videos. I struggle to pay attention, my mind will wander constantly as the instructor is teaching. These videos help me focus. Watching, listening and taking notes helps me retain the information better. Plus, I get to rewind when I become distracted. Thank for taking the time to educate me!
Same thing happens to me as well. Also, english being my second language is also the reason.
Some of the best explained info ive ever heard. Thanks so much for the careful consideration of " wording"/ terminology because its very easy to become complacent of wording leading to a total misunderstanding of functions for those who are wanting and trying to be good techs but that are just not quite there yet. Great job guys!!
you said a mouth full there my friend i am 66 and retired for a long time ,,,,,i always said everything can depend on HOW A TEACHER explains certain things ,,,they can understand it well OR cause a big f,,,,ing mess LOL ,,,,,enjoy the new year
Amazingly clear and precise video. Incredibly thorough video. Thank you so much!
Nice information guys. And since you guys put out the free videos I will do my part and not skip the commercials, only fair. Thanks.
Ty brother! Informative, clear, loud and slow.
We need a troubleshooting sequence to figure out what went wrong with heat pumps, besides typical operation sequence. Like with furnace operation. Trace what's supposed to happen, and find the defects. Like stuck or worn out reversing valve. What would you see, how would you know? What would your pressures be like?
ill give this 5 star. very good explanation.finally no more intros direct to the point.
Really, what is up with that??
Loved the video. It was very informative and he nicely explianed the concept practically.
Love these videos. Excellent description of the system and the process.
Glad you like them!
wow ! nice review for this retired old man lol ,,,,,,well done guys ! now in 2020 first day ,,my heat pump is running in north florida ,,,,,not like miami or ft laud here at all for just little over 4 hours away ! thank you
This is THE best HVAC channel out there. This dudes like a surgeon but only in the HVAC field....
👍👍👍👍 nice explanation I don’t work on many heat pumps here in Iowa nice refresher.
this is a great channel to watch, learned a lot. keep it up with a good content....
Really help I use to always wonder how did the heat pump work, but it’s amazing how the coils make that switch. 3 main things that he spoke was reversing valve defrosting board the common suction line how they rotate depending if it heat or cold air
Thank you very much for your teaching hope you guys make more of this. Heat pumps thanks 🙏
We’re starting to see alot more of these up in Connecticut. Thanks for the video!
when the system goes into defrost it simply goes back into cool mode with the fan cycled off so the head pressure can go up and then a signal is sent to the indoor board to turn on the heatstrip so it can warm up the cold air while its in defrost. And the main reason you want to have a high head preasure is so the hot gas can melt the ice around the outside coil.
Wow
Bam!
What's the reading on the hot line?? When it comes out
Good explanation exhibits what it's doing. How's the cycle sensed & actuated to defrost the iced outside coil? Time or by a temperature sensor?
The defrost terminator initiates and terminates defrost by temp.
What a great explanation, well done.
Would like to see a video on pressure drop on line sets / sizing
Thanks for the videos, great work!!!
Great video and good detailed explanation.... keep this video coming
As a HVAC student I love your videos
Thank you for your clear explanation and good luck always
Thank you so much for sharing this teaching video.
Pretty helpful thanks sir for simplifying it made a little easier to understand
Wow this is a lot. Thank you for the information very much needed
great information. thank you so much!
Here in Colorado, heat pumps are usually connected to a furnace for a dual-fuel setup because NG is far less expensive and efficient compared to heat strips. If you buy an efficient enough heat pump, it will be less of a problem or requirement of NG furnace. But I love my Bryant Evolution Heat pump and high-efficiency Bryant Evolution furnace. The cost of electricity is skyrocketing but our solar panels produce plenty of power during the day to run the heat pump completely.
Great explanation!
Very helpful video - thanks for posting! :D
Thank you so much what you shared for us.
Thank you got great information on Heat Pump system.....
I see you have Comfortguard on that system. Good info.
Thanks!! Good video.
Great video Guys
Thanks a lot for this video 👏👏👏👏🇻🇪.
fantastic job
very informative. thanks.
Hello, I am wondering what the drawbacks would be to putting the compressor in a shed? Specifically an uninsulated 8' x 8' x 9' open eaved (32 sq ft of open soffit vent)) building on an 8" concrete slab. This would be in a 95% heat situation but in very high humidity. I am thinking of all the corrosion, leaf/needle accumulation, as well as snow. Since the unit is just coated steel and the fins are so close together avoiding having them foul up would help the unit's longevity immensely. This is a 17' line set that I have another two layers of insulation over the top of the original. i started it up two days ago (45 degrees night and day 100% humidity) and am seeing a lot of condensate coming off the bottom of the casing which has a drain installed leading outside. I installed it up off the floor about two feet on a wood shelf with 4x4 legs drilled into the concrete. The issue is it makes enough water to keep the wood soaked and a puddle on the floor (although that drains out the door it will be an ice rink in the freezing weather). I am hoping to protect the unit from the wind and rain/snow that accumulates here in a temperate rain forest and coastal winds. I have found the plastic drain fitting is proud of the bottom enough to always have a layer of cold condensate in the bottom which condensates on the bottom side of the bottom in a major way. I am thinking of spray foaming between the shelf and the bottom with low expansion canned foam to stop this happening? As the temperature outside drops I can't see it doing anything but becoming a block of ice building up from the bottom? What are your thoughts? I have not found this addressed anywhere else. Thanks. Doug
Relly nice explained
Good video!
Heat pumps are krazy tight and mind blowing yo.
That’s what I’m Really Really realizing now
Good video. Any chance on getting a video on multimeter basics in the field?
Good teaching master
great video.
Nicely done
Good stuff guys thanks
Hi sir any jobs in air conditioning technician s plzzz information
realy great info
That was nice!
Can this be used with an existing heating/cooling system i.e. existing furnace/AC kicks on in extreme cold/heat otherwise heat pump is on? Also does system have a backup so it works when power goes out?
The evaporator is referred to as the indoor coil and the condenser coil as the outdoor coil to eliminate confusion, indoor fan, outdoor fan... when d3aling with heat pumps.
nice description of the systems and operation, can you clean up those wires with some wire ties so it is easier to see what the components are
Thank you for helping educate people who have to know EVERYTHING due to corrupt tech companies who only want to sell units and not repair. There should be a law. I went through four last time I had an issue and finally fixed with blower motor instead of $6500 replacement. Those liars are killing your industry.
It's all fun an games until an untrained homeowner gets electrocuted since they neglected essential safety procedures prior to working on the system since they became an HVAC guru via CZcams over night....
@@factfactory575 No one suggested DIY on HVAC, or other major systems, or even tolerating unlicensed repair guys. But since most 'servce calls' and 'repair techs' are just salesmen, it's good to have knowledge to find the right, licensed guy (one who doesn't carry or sell systems).
Very true, I work for an HVAC wholesale company.
What is the transformer on outside unit for. Does this supply the 24V to the inside of the house as well.
Thanks 👍
2:02 Nice..Balance point what is the balance point for Florida?... curious...and HHD? I would assume high balance low HHD
Hi, I just want to leave rough in lines in my new construction for now between air handler and outside heat pump unit. Should I leave just two half inch copper lines or do I need anything else. I will leave two 5 conductor low voltage wires and ac wiring as well. Also do I need to insulate those copper lines?
I have an 8-year-old Bryant 213B heat pump & Bryant gas furnace. This morning (at 35 degrees outdoors) I upped my thermostat from 64 to 69 degrees. The heat pump and furnace fan came on and ran for just a couple of minutes. Then, due to the call for 5 degrees of heat all at once, the Aux gas heat was initiated which makes sense. I heard the gas burner fire up and the vent pipe got hot. My concern is this: I could hear that my heat pump was still running. I learned that the 2 units (HP & gas furnace) should never run at the same time. I suppose it could be that the HP is possibly running in a different mode, such as defrost or possibly in some way that would not be harmful, but I don't know. So, I immediately dialed back the thermostat to shut it down. I don’t know how to confirm if this is a ‘dangerous’ situation or not. I don’t know if the heat pump is supposed to ‘run on’ in some otherwise safe mode temporarily. I am afraid that if I let it run on just to see if it eventually shuts down I might do damage in the meantime. The fact is that it may have been doing this all along but since I installed a new thermostat recently I am being hyper-vigilant now. I am very confident that my thermostat wiring and setup is correct. I would feel better if I knew that the HP is supposed to behave like this under these conditions. Can anyone comment on this if you happen to know?
I live in North California we don't get snow here when installing this or wiring this should wire the defrost wire or just bypass it
good info
in the indoor unit we have two coils and a directional valve? One for cooling and one for heating? Or Is there one and the same element that performs two functions?
The bypass for either heating or cooling occurs at the reversing valve?
Yes and No. The reversing valve only selects the direction of the refrigerant once it leave the compressor. For heatpump mode It simply sends the liquid to the outdoor coil so It can absorb heat there then takes the heat to the indoor coil and a fan blows the warm air into the conditioned space.
Can you please do one on a commercial carrier unit
What happens when it's very cold outside how take heat on temperature colder ..? It's normally head pump running and doesn't stop on this colder days
Does the compressor run during the Heat cycle just like during the Air Conditioning cycle? Will the electric consumption be just as high in the winter as it is in the summer?
I see. The flibjabber encapsulates the mobibblybob at the same time the jigglydiggly sucks out the whammyjamjibblybop. Got it!
I have a heat pump and a gas furnace. The company I work for does this a lot here in Indiana.
What is the reason for doing that? I want to know, thanks
whole suction line have to be insulated?
I installed a Carrier heat pump system a few months ago. Heating and cooling functions are fine so far. But there is a wild constant humming sound from the bottom of the unit (transformer?) when the system is not working. Is this normal? Thanks.
Unfortunately that is normal in my experience. But I am no electrical expert.
Probably the contactor. It might have gotten wet or have insects in it.
Do the fans blow the same direction or do they change in respect to the coils absorbing and dissipating heat?
they always blow the same
Just graduated HVAC trade school and have a buddy that's having an issue with his outdoor heat pump unit. Says he hears his outdoor unit run randomly in cool (lives in las vegas about 70 degree weather currently). He noticed it because his unit is right next to his bedroom. Thermostat is set to off the times that this has happened and the said he didn't feel any air coming out of his Vents. Told him to check for any schedules on the thermostat and there was none aside from it already not calling for it because the tstat is off. What are some possible things that can cause this. When I went I didn't see anything out of the ordinary and it happens randomly.
Great explanation, but isn't this a long way round just to say that the system swaps the coils, and bypasses the expansion valve that is not in use? Then it has a back-up electric heater inside and a fan-kill option outside to get the coils hot enough to defrost. I was hoping for an explanation of some of the engineering, I guess, like if the suction line is still larger, what effect does that have coming off the compressor in heat mode, etc.
I couldn't ever figure out what went wrong except to replace a worn out reversing valve. What could be worse besides a compressor burn out?
I like how he just starts off saying most of us know this then glossing over it like we already know lol my dude we're here watching this video because we know almost nothing.
No point in learning about a heat pump if you don't understand how a AC unit operates first, that would be the first step. He really should have mentioned that but this content is for their students, not really directed at the public.
endothermic and exothermic state changes through the manipulation of pressure. three way valve position determines the direction of flow. Come to Canada boys, we'll get yall learned up. those valves are called suction and liquid line service valves by the way.
🙄🇨🇦
Can you provide us with your heat pump videos on youtube I am sure we could learn a lot from your wealth of knowledge.
I thought they were two position valves. Inny or outty, like belly buttons.
Do these also have a reheat coil?
Nice in comfortable
Took me a while to understand that the heat pump is also the reversing Valve. I was looking for an actual pump or anything like that until I got my thoughts together
Sounds easy enough.
Hi my name is Jose I am from Los Angeles ca I watching your videos and I loved but you never told about water source heat pump please if you have any time to talk about water source
Gooooooood
Please make vidio tutorial how to repair heat pump error 29.. thank aboat it Mr
I always thought heat pumps made a lot of sense to me, the system literally is pumping heat... it takes heat from either inside or outside and pumps it from one space to the other
Yes. Heat flows to where it's cooler the way water flows downward due to gravity. A pump uses energy to work against these.
Common suction is also referred to as "true suction"
So like, what's the point of one line being big and the other being small if you literally run it in reverse???
Jesse....you're awesome. Just one minor detail....please allow me to remove the "bar code sticker" (@ 9:39) from your shirt collar so you can be all comfy....
Does some heat pump have burners
I assume that you are talking about the air handle or furnace. Yes, as backup or emergency heating, there can be either gas fire or electric elements that can be in place.
Yes some heatpumps are equiped with 2 or even three ways to heat. In the HVAC/R industry me call them dual-fuel or multi-fuel systems. Ive seen one with heatpump for primary , electric for back up, and natural gas for a third source. Ive also seen pellet fuel burners on ground source heatpumps. Its all in what makes economical sense.
Vrf system explanation
The strips are only 24v? Or 220v?
Heat strips are 220v. They work like the heating element in a waterheater.
@@TanTan-ni4mg it's actually more like a toaster
You're kidding, right?
If its warm outside, shouldn't be even warmer inside? Why the need for a heat pump then?..
Anyone have a customer with a new install go out and use a fire extinguisher after watching a defrost cycle?
I haven't but I can guarantee it has happened. I have heard my dad talk about people calling about their ODU being on fire.
Only 1 unit to heat a whole house ..?
Please indonesian subtitle
COOLING CYCLE is a just cycle in a HEAT PUMP SYSTEM
HEATING CYCLE orREVERSE CYCLE is just another cycle in a HEAT PUMP SYSTEM
HEAT PUMP is any SYSTEM that allows you to capture energy from point A and take it to point B as that happens through a thermo-dynamic process we call this energy heat
In the end of the day HEAT is only a label that we use to talk about energy so whoever is listening to us understand that we are talking about energy transference in a thermo-dynamic process
There are many other language traps in HVAC like “cold retention” and so on..
They have been around for decades!
I think "taking heat from outside air" confuses people. The heat transferred into the house comes from the compression. Outside air just needs enough heat to boil off the refrigerant in the outdoor coil.
You are confusing heat and temperature. The heat absolutely comes from the outside air. The temperature increases during compression.
@@HVACS the refrigerant evaporated from the outside air is still below 40. Cool vapor prevents overheating from the compressor, right? Heat of compression will be about 100-120, right? After the heat exchange in the indoor coil, air from the register around 90. Not confusing temp and heat as latent heat isn't really a factor in heating mode. I'm no professor, but you need enough outside heat to boil in the outdoor coil. All sensible heat should come from compression, no?
Watching a bunch of HVAC videos and computer programming videos because... 21st-century.
The term "heat pump" originates from physics and thermodynamics. "Heat" = thermal energy, thus even environments that feel cold still contain heat. It's "cold" to us humans, because we have limited ranges of temperature we tolerate and like to live and feel comfortable in.
Thermodynamically, heat will flow from where it is higher to where it is lower:
- in the absence of some force/energy opposing that flow
- and if there's a path for that thermal energy to flow
What are some of the things that oppose/slow down that flow? Thermal insulation is one. Physically, they're ways that increase that flow path thus slowing down the overall heat transfer from warmER to coldER.
Another one is a heat pump, a system that opposed that thermodynamic flow, pretty much at the cost of energy (adding heat to the larger overall system).
Air conditioners, refrigerators, even furnaces (in a sort of roundabout way), are all heat pumps. ACs are easier to conceptualize because people already understand what they accomplish (even if vaguely). They're just fixed in the direction in which they pump heat, which is why ACs aren't used in the off-seasons.
A heat pump, as in the appliance, is thus "just" an AC that can operate bidirectionally, pumping the heat in either direction as well. If you took a small 5k btu window ac unit and flipped it around in the winter, you could have a really poor man's "heat pump" (appliance), in effect "air conditioning" the already cold outdoors even further. Purpose-designed heat pump appliances are accomplishing the same with some additional components, and likely design + engineering so that coil systems can serve as both condensers and evaporators.
In the summer, it costs energy, in the form of additional heat to the net thermodynamic system of home indoors + outdoor environment, to effect a cooler area such as a home. But in the winter, this works in our favor, outputting more heat than energy that is put in, because the difference is heat being taken from the colder outdoors.
Engineering-wise, there's more to it.
ACs aren't generally designed to cool the cool side to below ~60F because they're for human comfort, so they are heat pumps designed for efficient operation in that temperature range.
A refrigerator is a heat pump designed to cool down to lower temperatures, below freezing in the case of freezers, partly due to the heat pumps used, partly due to also having an insulated box.
A heat pump (appliance) has to be able to efficiently extract heat from an outdoor environment that's potentially closer to that of the refrigerator than that of the above AC example. So not only is it more versatile an appliance in that it's usable during both heating and cooling seasons, it also needs better engineering for the reversibility of heat pumping direction but also for extracting heat in colder temps during the heating season. This is where features like Hyper Heat come in.
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Not discharge muffler it is filter dryer