It's the simple things that you mentioned Craig about connecting and disconnecting your manifold gauge set to a system that can allow air in which of course has the moisture. And a simple thing as the condensation on the suction line would slip by most people and allow water in. Great video and have a great weekend!
Another great video Craig. Good visual point about the condensate collecting in the service valve when the cap is removed. And I highly recommend your book (Hardcopy) to any tech. The target superheat chart is nice and big for easy reference for my old eyes.
We check some with test probes or test gauges and check the rest with the gauge sets but we always need to purge the air so we don't contaminate the system, thanks!
Hi Craig. You have the absolute best videos!!!! You do a such a great job explaining your craft. I have really learned so much watching all your videos. Well done sir. I really like the "components" videos so we truly understand. Sequencers comes to mind. Thanks for what you do.
I also like superheat and subcool video. I understand now its change of state in the coil and how that works. No one I found really explains what these terms mean......
Is the E book a narrated video? I already purchased the book, but is there any advantage for the E-book? Thanks for your excellence in teaching us proper procedures for HVAC service.
The ebook is available so that you can view it on a cell phone, tablet such as an ipad, or a computer. It is not narrated by me but you can use the narration feature through google play. It also seems to be a favorite for those outside of the US so the cost is less and they don't have to pay for international shipping. Thanks for asking!
What would the procedure be to get those non condensables out of the system if suspected?? Also say you get an acid tester and its positive or youve hade a line burst on a unit and need to change the oil. Would you simply pump out the oil in the compressor, tip it over and all as well as purge or blow the lines out with nitro then simply pump new oil into the compressor?? Im just confused about getting the oil out of the lines if you have a txv and a reversing valve.. just seems like youd never get that oil out even with flushing with a chemical. Unless you removed the txv’s, flush on fwd and rev and all.. but still even at that, seems like youd never get all of the flush out..
hey Craig. how do we know as servjce techs after a system had a leak small or big , if it lost refrigerant oil ? like if we noticed oil saturated in to thr armaflex where the leak was found. you think it's from the refrigerant itself from 410a or that it's the oil coming out the compressor??
Great video! Quick question. I have a used 3 ton unit I was planning to have installed. The sales guy came out yesterday and said the valve was left open and therefore the whole unit is bad due to moisture getting into the oil. He also said the unit is too large for my home which is 1500 sq ft. Does this sound legit or was he upselling me a new unit?
Great video and info I was looking for. Just installed two Fujitsu mini splits, and on the last one after pulling a deep vacuum on both sides with a micron gauge I started to release the refrigerant. However, the mid-quality valve I had from my hose to low side began to leak. At first I was thinking the hiss was the noise of the refrigerant being released, but after tossing and turning over it I believe it was the vacuum breaking and leaking through the mid-quality valve.... Must have leaked for a good 3 - 5 seconds. What do you suggest, should I pull all the 410A, vacuum deeply and load fresh refrigerant? I scoured the web and cannot find this information; does your training material cover this scenario? Thanks
Good stuff for those that dont know. Poor technicians (install or service) are ultimately the reason for water in a system. Point of install just a visual..look at that lineset where was the pride on install? So was the vacuum done properly? People you get what you pay for..Good work isnt cheap, and cheap work isnt good.
Hi Craig I have a problem as below On fujitsu ducted aircon in Australia both the service ports (smaller and larger pipes) are located after the Exv (exv is located in outdoor unit) and one of them was showing me about 240 psig while suction line showing 130psig. There is no other service port available after condensing unit and befor exv for measuring subcooling for refrigerant check. I asked fujitsu and was told the only way is temperature differential between return air and supply air for checking refrigerant level. (which I don't belive so) So question is how to measure charge level( as sub ooling method) if no service valve available after condense unit and before exv. I can send you a photo of service ports if required. I can send you a piping schematic to clarify. Iv sent you an email with piping diagram
I apologize it took a while to get back. We cant really check the subcooling level as the refrigerant charging method for these units since the vrf compressor ramps up and down. The manufacturer doesn't give us guidelines. What I can say is on the vrf minisplit systems I have been installing, the superheat was 0 to 5 degrees after I weighed in the correct amount of refrigerant using the total weight method and the accumulator protects the compressor during low superheat. Manufacturers want us to only use the total weight method so that is why they don't give us guidelines, thanks!
How do i tell my poe oil still good ? I used last time about 1/3 of container then cap It back. I like to know how to tell rest of POE oil still good. Jason
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Started using wireless probes this past year. Best decision I ever made. Haven't touched a manifold in over a year
It's the simple things that you mentioned Craig about connecting and disconnecting your manifold gauge set to a system that can allow air in which of course has the moisture. And a simple thing as the condensation on the suction line would slip by most people and allow water in. Great video and have a great weekend!
Thank you very much Stuzman!
This is something I need to pay more attention to.
Glad to help Pat!
Always great to start the morning w/ Mr Mig knowledge!
Enjoy!
Another great video Craig. Good visual point about the condensate collecting in the service valve when the cap is removed. And I highly recommend your book (Hardcopy) to any tech. The target superheat chart is nice and big for easy reference for my old eyes.
Thank you very much Roger and we are always looking for reviews of the book on amazon if you were willing, thanks again!
Great video as always but I wanna see how techs will really do that in the middle of the summer having 7-8 calls in a day
None. In the business for 30 years.... only seen it done on TH-cam.
We check some with test probes or test gauges and check the rest with the gauge sets but we always need to purge the air so we don't contaminate the system, thanks!
Hi Craig. You have the absolute best videos!!!! You do a such a great job explaining your craft. I have really learned so much watching all your videos. Well done sir. I really like the "components" videos so we truly understand. Sequencers comes to mind. Thanks for what you do.
Thanks a lot Chris! I appreciate you mentioning that! We will be having a general purpose relay video coming out soon, thanks!
Well done Craig, another informative video.
Thanks a lot Dylan and thank you for your support!
Excellent video!!!! thank you for sharing!!!! Good to see your face.
Thanks Jimbolla77!
One reason I stopped using hoses and a manifold... joblink probes have changed my life
I’ve learned a lot with this video thanks teacher
Glad to help!
Great info. Always been a huge fan of your videos.
Thank you very much Rookie Refrigeration!
This is an excellent explanation
Great video! I still prefer using my Parker Sporlan Bluetooth gauges along with a couple core removal tools in case I have to add refrigerant.
You can just use charging tees instead of the valve core removal tool to add refrigerant unless you are weighing in from a vacuum, thanks!
I also like superheat and subcool video. I understand now its change of state in the coil and how that works. No one I found really explains what these terms mean......
Have you checked out the refrigeration cycle playlist? Also the newest saturated refrigerant video that is all animated? Thanks!
good work you help us a lot God bless you I have the book thank you
May the Lord Bless You Too Miguel! Glad that the videos and the book are helpful!
Another Great video 😁
Thanks Phillip!
Gonna buy me that book
You can purchase the book at www.acservicetech.com/the-book or www.amazon.com/shop/acservicetech thanks!
Good Stuff!
Thank you for your support!
Is the E book a narrated video? I already purchased the book, but is there any advantage for the E-book? Thanks for your excellence in teaching us proper procedures for HVAC service.
The ebook is available so that you can view it on a cell phone, tablet such as an ipad, or a computer. It is not narrated by me but you can use the narration feature through google play. It also seems to be a favorite for those outside of the US so the cost is less and they don't have to pay for international shipping. Thanks for asking!
Sir how we determine if the oil is acidic through color?
Why does it make noise when I add freon and on starts up it starts rumbling
What would the procedure be to get those non condensables out of the system if suspected??
Also say you get an acid tester and its positive or youve hade a line burst on a unit and need to change the oil. Would you simply pump out the oil in the compressor, tip it over and all as well as purge or blow the lines out with nitro then simply pump new oil into the compressor?? Im just confused about getting the oil out of the lines if you have a txv and a reversing valve.. just seems like youd never get that oil out even with flushing with a chemical. Unless you removed the txv’s, flush on fwd and rev and all.. but still even at that, seems like youd never get all of the flush out..
hey Craig. how do we know as servjce techs after a system had a leak small or big , if it lost refrigerant oil ? like if we noticed oil saturated in to thr armaflex where the leak was found. you think it's from the refrigerant itself from 410a or that it's the oil coming out the compressor??
Great video! Quick question. I have a used 3 ton unit I was planning to have installed. The sales guy came out yesterday and said the valve was left open and therefore the whole unit is bad due to moisture getting into the oil. He also said the unit is too large for my home which is 1500 sq ft. Does this sound legit or was he upselling me a new unit?
Great video and info I was looking for. Just installed two Fujitsu mini splits, and on the last one after pulling a deep vacuum on both sides with a micron gauge I started to release the refrigerant. However, the mid-quality valve I had from my hose to low side began to leak. At first I was thinking the hiss was the noise of the refrigerant being released, but after tossing and turning over it I believe it was the vacuum breaking and leaking through the mid-quality valve.... Must have leaked for a good 3 - 5 seconds. What do you suggest, should I pull all the 410A, vacuum deeply and load fresh refrigerant? I scoured the web and cannot find this information; does your training material cover this scenario? Thanks
Good stuff for those that dont know. Poor technicians (install or service) are ultimately the reason for water in a system. Point of install just a visual..look at that lineset where was the pride on install? So was the vacuum done properly? People you get what you pay for..Good work isnt cheap, and cheap work isnt good.
Absolutely, good points, thanks!
Hi Craig
I have a problem as below
On fujitsu ducted aircon in Australia both the service ports (smaller and larger pipes) are located after the Exv (exv is located in outdoor unit) and one of them was showing me about 240 psig while suction line showing 130psig. There is no other service port available after condensing unit and befor exv for measuring subcooling for refrigerant check. I asked fujitsu and was told the only way is temperature differential between return air and supply air for checking refrigerant level. (which I don't belive so)
So question is how to measure charge level( as sub ooling method) if no service valve available after condense unit and before exv. I can send you a photo of service ports if required.
I can send you a piping schematic to clarify.
Iv sent you an email with piping diagram
I apologize it took a while to get back. We cant really check the subcooling level as the refrigerant charging method for these units since the vrf compressor ramps up and down. The manufacturer doesn't give us guidelines. What I can say is on the vrf minisplit systems I have been installing, the superheat was 0 to 5 degrees after I weighed in the correct amount of refrigerant using the total weight method and the accumulator protects the compressor during low superheat. Manufacturers want us to only use the total weight method so that is why they don't give us guidelines, thanks!
How do i tell my poe oil still good ? I used last time about 1/3 of container then cap It back. I like to know how to tell rest of POE oil still good. Jason
How much actual oil is in a typical unit ?
how long will it take acid to form in the system that has moisture in it?
Hi, is HITACHI scroll compressor 410 gas good ?
Bro is Shrrrredded.
Question I have an old (20 years) mini split that trips high pressure only on heat mode on cooling it works fine any suggestions?
Is it possible the indoor head units are not blowing the air at a high enough speed to reject the heat and therefore the pressure is climbing?
If not air flow: A Temp sensor partial fault.? Or orifice issue?