This makes no sense to me and it seems to be described in such a simple manor too. I am going to just assume it's a good system on my new home. I'll just hire somebody to fix it that understands this stuff. I fix computers for a reason, this crap is way to hard to understand.
This Person is teaching very good when I went to school for HVAC I have a Teacher like this man . I was working on Industry , because my Teacher was like this men , very good explanation .
As someone who can self teach, I still appreciate well-constructed videos like this one that get to the point and do a good job of succinctly communicating the information that's needed. Sometimes I find textbooks to be a bit of a vicious assault on my attention span, so it was nice to get a little visual confirmation.
Thank you Graham! The video producer went to school for the subject and has worked in the field for years, also. He (me) happens to be simple-minded and knows how to simplify technically complicated material. I explained to my six year old, just last night, how electricity works and is measured. She then explained it to my wife this morning... surprisingly accurate. :)
It only steals heat from the outside air or sheds heat to the outside air via the refrigerant lines and fan. It does not pull outside air in unless there is a fresh air intake installed.
Let's say that we have a heat pump like this one: HITACHI YUTAKI-M 14KW MONOBLOC ATW HEAT PUMP. I want to know the energy consumption (electricity consumption). Thanks.
It says that this is more efficient yet now you have your furnace and your ac unit running which draws more electricity than having just your furnace running. How are you supposed to cover your AC unit outside if it's going to power on here and there in the winter?
The idea is, that in moderately cool weather, the heat pump keeps the backup or emergency heat from coming on. Some backup heat is electric heaters, as in the video and some are gas.
All the A/C that are installed in houses in my country, have a mode button. The options are usually cool, dehumid, fan, heat and auto. I want to emphasize that they have both heating and cooling. Does this make all the A/Cs heat pumps?
MihalisNavara - No it does not necessarily mean it is a heat pump. If the outside fan is blowing REALLY cold air out of it when the outside temp is around 17° C or below, it's probably a heat pump. If the outside unit is not running at all during the cool temps, but the inside unit is heating the house, probably NOT a t heat pump.
Love this presentation. Needed this information for a product we have to decrease the amount of energy a heat pump (also AC and refrigeration) uses by over 70%.
Not bad, but I feel you have your colors backwards. Red normally indicated heat whereas blue indicates cool. Therefor it is hard to follow your example as one has to constantly reverse this in one's mind as one watches.
It can be, depending upon outside temp and humidity. You will hear the outside fan stop, but will hear the compressor still running and the swoosh of the reversing valve when it actuates.
Sometimes the outdoor units fan shuts down for some time then I hear a hissing sound and it's silenced completely and I still hear the indoor unit running still then the outdoor one starts to make some noises for a few second then the hissing noises is heard again, then it starts up again and goes back to normal, that mostly happens in the winter. I wonder if that's a normal thing for the outdoor unit to do?
The Apartment I live in with My Family has the outdoor unit and indoor unit far separated cause the outdoor unit is outside one of the bedroom and the indoor unit is in the utility closet which is in part of the hallway.
I’m 16 y/o and I plan on becoming an HVAC technician when I grow up this is still very confusing for me if anyone has any advice on how to better understand or better prepare I would greatly appreciate it.
It's a lot to take in. The creator of this video attended a technical school full time for one year and still only had a fundamental grasp of the hvac/refrigeration principles upon graduation, but that's all it took to land a job in the field and start a career that provides a good living. This video is only intended to explain it, as good as possible, in less than 5 minutes. I hope it brought you just a little closer and wishing you the best in the field!
Sir, Why have you used hot ambient air in winter cycle for input in Evaporator coil? Is it a convention? Is it because the refrigerant temperature after passing the evaporator coil still lower than the ambient? How come will it make a difference in respect to ambient and cooled space? Thank you for making a precise & complete explanation.
Yes, the ambient, outside air is still warmer in the winter than the boiling point of the refrigerant at such a low pressure, thus allowing heat extraction from even frigid air. However, as the outside ambient air reaches extremely low temps, the unit will become less efficient and if it can not maintain the house thermostat set point, the auxiliary or "strip" heat will turn on to assist.
Video didn't mention that some defrost boards utilize an outdoor t/stat to initiate defrost. When temp outside falls below a certain setpoint temp, it closes to complete the auxillary heat circuit, putting the heat pump in defrost & bringing on the aux heat. I like outdoor t/stats but not all heat pump t/stats are set up for an outdoor t/stat. I think at the t/stat in the home, W (white wire) & Aux (sometimes the blue wire) are jumpered. I like to designate black for common & brown for Emergency Heat. T/stat wire color codes vary, though.
These guys are great to have on your House Support Team! I have used them as I prepared my house for sale this Spring and have come to trust them with one of the most expensive components (Heat and Air system) of my largest asset, my house. Try them as I did, you will not be disappointed!
Hei! perfect video!! But I can´t see the point of having two valves and bypass (they are allready in serial)?? And I also wonder why having two dimensions on piping (Fluid 1/4" Vap 3/8") when the circuit changes diraction anyways.. thanks!
