I also suggest him and my AC Service Tech to my junior techs to learn off the job. Are they always perfect? No, but they’re ten folds better than most techs, instructors, and managers.
First off, keep up the great work! Second, just wanted to add a few tidbits you might find useful. For a defrost board to engage defrost, you need to make sure that your 24 volt R has power to board. I've come across Trane and Carrier heat pumps that will not defrost without board power. Also, if you want to check a Carrier heat pump defrost cycle quickly, just remove the pink defrost stat from board, jump the 2 defrost pins with a gator clip and then short the speedup pins 7 seconds for every 30 minutes of defrost timing. Defrost will run until gator clip is removed and plug reinstalled to board. Works the same with the 2 brown DF terminals on a Lennox heat pump. NC winters can get cold and during service calls/PM's, it's good to know that the board will operate when it is needed. Side note, shorting the speedup terminals on normal operation for Carrier reduces the needed runtime to 1/25th of its original time.
Great info. I wish a small vignette about zone systems would've been mentjoned; I've dealt with a dual fuel, zoned system that I was concerned did not have correct settings in staging, but I think it's issue was with having no supply air sensor, hence not able to shut off the compressor when the temp got too high, thus causing less heat rejection, putting higher strain on the system, and it was blowing compressors and breaking open places on the indoor coil.
Bryan I thoroughly enjoy & learn from everyone of your videos. You mentioned though that a piston can't increase pressure. I'm only bringing this up because I have gone back to some Carrier units (side discharge condensers mostly) where previous techs diagnosed & changed txv's, so called restricted evaporator coils & I've found that the piston was installed backwards on the heat pump. The head pressure is always high & subcooling all over the place. So now as common practice myself I test tempature before & after piston before I even start diagnosing a txv. Your already outside & right there. Basically a piston can increase pressure if not installed properly. Just 1 more quick check to perform before opening a can of worms.
Worked on a nordyne today with a piston in the expansion line(just like carrier)and the acoil wasn't warm in heat mode and had high suction pressure. Took the piston apart cleared a restriction, some tiny metal 3 pieces, pulled a good vacuum and weighed in factory charged and boom back running good
Another alternative to jumping out the defrost thermostat to test defrost cycle is to kill power to condenser, pull condenser fan wire from defrost board fan relay, restore power. Coil will become cold enough to close defrost thermostat within one minute. Initiate test pins, kill power again after defrost cycle starts, plug fan wire back in, restore power again and wait for it to exit defrost cycle.
Goodman, Amana, lennox and many others simply have a txv inside the condenser by reversing valve. Good discussion on knowing certain units don't have them but have a piston etc.
I live in Michigan and we are starting to use more heat pumps. We use foils fuel for our back up and during defrost. Still a massive savings I use one tank of propane a year compared to serval tanks without heat pump.
So if your unit has a heating txv you can check your pressures at common suction and liquid port? Because I have always been told to check my pressures at common suction and vapor line in heating mode with my gauges. P.S I am a huge fan and supporter of your podcast and UA-cam videos. I’m new to the tech side but I been an installer and also gas installer for 20 years. And I have ocd really bad and I want to make sure I’m doing the job correctly because I have a fear of making a mistake. Thank you for your help,time and advice
Hi everyone.. just reminding you that Jesus loves you all ❤️. Remember that we’re living in the end times, turn to Jesus before it’s too late ❤️, because Hell is a place of eternal torment
We in MN do run into more and more for heat pumps. Not counting the ductless Mitsubishi H2 ductless units. We sell enough mitsu units we area a diamond dealer. In the Detroit lakes MN area.
dear hvac school, i learn a lot from your videos, but please start using a good flir camera at the (txv) outdoor units to check how spot on the gas filling is, kind greetings from (cold) europe
Carrier Accutrol metering devices in the RTU'S. Very known for them to clog up with wax or oil due to compressor being operated outside of manufacturing specs.
😂 it can possibly be a cold snap if Jimmy doth crack thee corn in the winter month. Love all the video content and love the work you do in terms of educating newborn techs.
as a old vet refrigeration contractor here in commuegotnia , we have gone thru t12,r502,r500,r22 phase out ,an then a huge plethora of aueo tropic flavors , I saw in your video a sliding PT chart I'm guessing for many refrigerants ,,Where can I down load that program , /s/ bill purcell Purcell energy service Corp
I find the 100-110 over ambient is highly variable just like the condensor dtd. What drives discharge temp? Mass flow and suction superheat. On carrier units with piston I find much lower suction pressure and higher superheat than with unit with outdoor txv that is able to give higher mass flow and lower superheat across the board. The outdoor TXV equipped unit will have lower discharge temp.
A lot of systems have wonky readings because the evap coil is sized more for a.c then heat and the evap coil is alot smaller than a condenser coil so being the condenser in heat mode it builds a higher differential than normal sometimes.
You said if you have 130000 btu gas furnace you will get 130000btu of heat but if it’s a 80% you lose 20000 btu through the flue pipe and if it’s a 90% you lose 10000 btu through the flue pipe .. correct???
The comment about fuel oil. If wanted, I'll take a video on my next oil furnace an try to give a good service video for that. If someone wants to know. An I'll share to you
i lived in a house that was built in the early 60s in jacksonvile It had an oil furnace and when we replaced it back in 1993 the tech said they were dinosaurs and being phased out. It was replaced with a heat pump
@@davesmechanical he did say phx but they're in florida...he mentioned phx as an example of a dry arid climate as opposed to Florida which is hot and humid
Tell Bert to chill out on his dirty equipment inputs. But I loose interest when I hear it over and over. The home owners are not watching this, hvac techs are watching. We know that the system will not operate correctly if the coils are dirty. I bet this could have been a 45 minute video. I stopped watching after 25 minutes because my time is valuable. After I take a break I might finish watching.
This is super late to respond to, but as obnoxious as it to hear the same thing over and over again, he’s entirely justified repeating it and I appreciate it. If you work solo then you probably don’t have to deal with it, but 1000% if you work in a company with multiple techs there will be a tech that disregards the importance of having a clean system before testing and it can be costly both in time and parts. You obviously understand this. But you also have to be clued into the fact that there are MANY MANY techs that don’t take this part serious enough. He could’ve said it 8 more times and there will still be those who watch the video and disregard it AS TECHS. not trying to argue, but this is an educational channel. You learn by having things repeated.
Probably the best HVAC channel on UA-cam .
Ty Branaman is also Amazing. Always keep learning. These Dudes are Gods.
Also ac service tech with Craig
No, definitely the best
@@andrewsimon5437 also grayfurnaceman
Not probably, is!
As a licensed hvac contractor of 25+ years- this guy is truly a great instructor
I also suggest him and my AC Service Tech to my junior techs to learn off the job. Are they always perfect? No, but they’re ten folds better than most techs, instructors, and managers.
First off, keep up the great work!
Second, just wanted to add a few tidbits you might find useful. For a defrost board to engage defrost, you need to make sure that your 24 volt R has power to board. I've come across Trane and Carrier heat pumps that will not defrost without board power. Also, if you want to check a Carrier heat pump defrost cycle quickly, just remove the pink defrost stat from board, jump the 2 defrost pins with a gator clip and then short the speedup pins 7 seconds for every 30 minutes of defrost timing. Defrost will run until gator clip is removed and plug reinstalled to board. Works the same with the 2 brown DF terminals on a Lennox heat pump. NC winters can get cold and during service calls/PM's, it's good to know that the board will operate when it is needed.
Side note, shorting the speedup terminals on normal operation for Carrier reduces the needed runtime to 1/25th of its original time.
Great info. I wish a small vignette about zone systems would've been mentjoned; I've dealt with a dual fuel, zoned system that I was concerned did not have correct settings in staging, but I think it's issue was with having no supply air sensor, hence not able to shut off the compressor when the temp got too high, thus causing less heat rejection, putting higher strain on the system, and it was blowing compressors and breaking open places on the indoor coil.
Bryan I thoroughly enjoy & learn from everyone of your videos. You mentioned though that a piston can't increase pressure. I'm only bringing this up because I have gone back to some Carrier units (side discharge condensers mostly) where previous techs diagnosed & changed txv's, so called restricted evaporator coils & I've found that the piston was installed backwards on the heat pump. The head pressure is always high & subcooling all over the place. So now as common practice myself I test tempature before & after piston before I even start diagnosing a txv. Your already outside & right there. Basically a piston can increase pressure if not installed properly. Just 1 more quick check to perform before opening a can of worms.
Lennox gives you a subcool chart for heat mode charging. They can do that because they dont use accumulators.
Bert is fantastic!! LOVE THE " I ZONED OUT FOR 30MINS" !!!!!
I don't think it was mentioned by anyone here but you have to make sure the coils are clean before you can use these rules of thumb.
At 13:20 it's mentioned.
...and at 23:50
Always good to take a refresher coming into heating season.
Worked on a nordyne today with a piston in the expansion line(just like carrier)and the acoil wasn't warm in heat mode and had high suction pressure. Took the piston apart cleared a restriction, some tiny metal 3 pieces, pulled a good vacuum and weighed in factory charged and boom back running good
I loved your comment on temperature differential between colder climates and warmer climates. Keep up the great content!!!
Another alternative to jumping out the defrost thermostat to test defrost cycle is to kill power to condenser, pull condenser fan wire from defrost board fan relay, restore power. Coil will become cold enough to close defrost thermostat within one minute. Initiate test pins, kill power again after defrost cycle starts, plug fan wire back in, restore power again and wait for it to exit defrost cycle.
lolzzzzz sounds like some one is scared to touch live wires!!!
I’m be watched this video more than once and still get new information out of it
Excellent work as per usual.
Goodman, Amana, lennox and many others simply have a txv inside the condenser by reversing valve. Good discussion on knowing certain units don't have them but have a piston etc.
Rheem as well
Super great video
I live in Michigan and we are starting to use more heat pumps. We use foils fuel for our back up and during defrost. Still a massive savings I use one tank of propane a year compared to serval tanks without heat pump.
Great job
Great info. and discussion on heat pumps. Thanks Bryan.
dudes a good dang teacher for Hvac!!!
So if your unit has a heating txv you can check your pressures at common suction and liquid port? Because I have always been told to check my pressures at common suction and vapor line in heating mode with my gauges. P.S I am a huge fan and supporter of your podcast and UA-cam videos. I’m new to the tech side but I been an installer and also gas installer for 20 years. And I have ocd really bad and I want to make sure I’m doing the job correctly because I have a fear of making a mistake. Thank you for your help,time and advice
Hi everyone.. just reminding you that Jesus loves you all ❤️. Remember that we’re living in the end times, turn to Jesus before it’s too late ❤️, because Hell is a place of eternal torment
Higher head pressure on heat pump can also happen if the customer is running a pellet stove.
We in MN do run into more and more for heat pumps. Not counting the ductless Mitsubishi H2 ductless units.
We sell enough mitsu units we area a diamond dealer. In the Detroit lakes MN area.
dear hvac school, i learn a lot from your videos, but please start using a good flir camera at the (txv) outdoor units to check how spot on the gas filling is, kind greetings from (cold) europe
Carrier Accutrol metering devices in the RTU'S. Very known for them to clog up with wax or oil due to compressor being operated outside of manufacturing specs.
😂 it can possibly be a cold snap if Jimmy doth crack thee corn in the winter month. Love all the video content and love the work you do in terms of educating newborn techs.
These noises were on point 😀
I had a teacher nicknamed "the butcher" since he would not stop drilling a student until he either understood or on his knees begging for mercy.
If I ever move to Florida I'm coming to work for you, and you will have no choice but to hire me lol.. Great video man. #FinsUp 🐬 🆙 🏈
as a old vet refrigeration contractor here in commuegotnia , we have gone thru t12,r502,r500,r22 phase out ,an then a huge plethora of aueo tropic flavors ,
I saw in your video a sliding PT chart I'm guessing for many refrigerants ,,Where can I down load that program ,
/s/ bill purcell Purcell energy service Corp
How one tiny screw can obstruct the whole job. You always get it done.
PSA...Nordyne uses Pistons on the Liquid line on their HP's for their Metering Device....same exact style that Carrier used.
I find the 100-110 over ambient is highly variable just like the condensor dtd. What drives discharge temp? Mass flow and suction superheat. On carrier units with piston I find much lower suction pressure and higher superheat than with unit with outdoor txv that is able to give higher mass flow and lower superheat across the board. The outdoor TXV equipped unit will have lower discharge temp.
A lot of systems have wonky readings because the evap coil is sized more for a.c then heat and the evap coil is alot smaller than a condenser coil so being the condenser in heat mode it builds a higher differential than normal sometimes.
You said if you have 130000 btu gas furnace you will get 130000btu of heat but if it’s a 80% you lose 20000 btu through the flue pipe and if it’s a 90% you lose 10000 btu through the flue pipe .. correct???
Hi.do those rules of thumb can be applied to air to water inverter heat pumps ?
16:26 Contractor trash bags work perfectly for blocking off condensers
Do I add refrigerant through true suction in heat mode?
Great information
I really like the new shirts
Did you say you did not know what refrigerant was in the unit so you just added r422?
Ótimo trabalho
Eu sou do Brasil
Mas eu estou nos EUA quero fazer uma aula com vcs aí
Sorry but forced defrost is easier than running in cool waiting for delay
P.s. I carry plastic in my truck for wrapping condenser in cool mode lower than 60 degrees OAT
True suction was what I was taught. Good video. I've seen many a guages get stuck at "retard" lmao. Shown guys they can just replace the guage piece.
A contractors garbage bag works great to block the condenser and it’s dual purpose and takes up no room on you truck
Good ole burnt out Burt 😂
3:30 that laugh though.
The comment about fuel oil. If wanted, I'll take a video on my next oil furnace an try to give a good service video for that. If someone wants to know. An I'll share to you
dont give up on Burt. it might take him a while to get there. But he'll get there. hahaha
That laugh though 😂
The school 🏫 my recommendation for you, we need a school in Port Saint Lucie Florida, U.S.A.
i lived in a house that was built in the early 60s in jacksonvile It had an oil furnace and when we replaced it back in 1993 the tech said they were dinosaurs and being phased out. It was replaced with a heat pump
Let’s talk charge compensators!
Is Eric starting the Kalos tie dye shirt trend
I can't believe he let's Bert in there troll him
turn that screws
You know you're in florida when you see the Salt Life tshirts
He said Phoenix
@@davesmechanical he did say phx but they're in florida...he mentioned phx as an example of a dry arid climate as opposed to Florida which is hot and humid
Do you have a book?
Don't worry boss I'm blowed too
Slow down your explaining man had to rewatch many times. I'm sure a few of the students get lost too. Very good content though.
Don’t think Bert had ever used the charging jacket before….. lol …. Good try……
Really the guy on the pink short thinks still in high school his behavior it is like a child. Not good for business
Tell Bert to chill out on his dirty equipment inputs. But I loose interest when I hear it over and over. The home owners are not watching this, hvac techs are watching. We know that the system will not operate correctly if the coils are dirty. I bet this could have been a 45 minute video. I stopped watching after 25 minutes because my time is valuable. After I take a break I might finish watching.
This is super late to respond to, but as obnoxious as it to hear the same thing over and over again, he’s entirely justified repeating it and I appreciate it. If you work solo then you probably don’t have to deal with it, but 1000% if you work in a company with multiple techs there will be a tech that disregards the importance of having a clean system before testing and it can be costly both in time and parts. You obviously understand this. But you also have to be clued into the fact that there are MANY MANY techs that don’t take this part serious enough. He could’ve said it 8 more times and there will still be those who watch the video and disregard it AS TECHS. not trying to argue, but this is an educational channel. You learn by having things repeated.