DrZ HEy Again. hey i found out im getting no power at the outdoor box for the condenser... before and obviously after the breaker. where does this power line go to straight to the main breaker panel? or inside the furnace? any help woudl be appreciated
Im trying to charge a heat pump in the winter with r22. Its about 40 degrees outside. Ive gotten about half the amount of r22 needed into the system, but the defrost is kicking on now and shutting off the compressor. Can you give me some advise please. Im still green behind the ears!
I'm learning refrigeration repair for the company I work for. We refurbish used Soft serve ice cream machines. We rebuild water cooled and air cooled units. When pressure is highor low in the water cooled unit we adjust the water valve to achieve pressure but in the air cooled units I'm unsure of what to do to get the right pressure. I don't know how to adjust it if its even possible. Blower works fine and condenser is clean
@dendog21 It's important to have the correct amount of charge in the system to be sure that the subcooling off the condensing coil is at the manufactures specs.
ok so im currently getting a HVAC certificate at a tech school and im trying to decide if i should get an Industrial Electrical Maintenance Technical certificate after i get the HVAC one...would i get a better/ higher paying job if i have both certificates or would it not really make a difference?
@5NOOPY615 Initially it will not make a difference. Most companies are going to assume that you know "Just enough to be dangerous", thats why they want 2-5 years of field experience.
@dianemarie909 scale counts backwards because its a scale and you are removing weight from it as you charge your system. What happens when you remove weight from a scale? The number goes down right? And if you start at zero then it wil go into the negative.
@dianemarie909 The scale will more than likely always read negative since the tank is being weighed backwards. Its being weighed by weight loss, not weight gain.
@SombraLocs I connected the vacuum pump to the gauges which were connected to the unit. You need to evacuate the system to 500 microns or less each time.
thanks for making ur videos.. i love them.. i jus wanted 2 know which hose did u attach 2 the system? the back or the front.? and the yellow hose is jus 4 vacuum right?
@soapfanatic I connected the red and blue hoses to the system. The yellow hose that's connected to the gauges is connected to the recovery unit inlet. Then a separate hose is connected to the outlet side of the recovery unit and to the recovery tank.
hi DR ZARkloff good job. i check you videos. today and i am working in a comercial unit is dead is # DH120N20A2AAA3A PKT predator the control board is dead. i replace the 24v trsf but not work. have the 208v 230v in no 24v output. le me know. thanks.
@avito54 Check the transformer to see if it has a small breaker built in to it. It could be tripped. If that isn't it then see it there's a fuse somewhere inline or even on the board.
You purged the yellow hose before hooking it up to the recovery tank. As soon as you closed you manifold you allowed air to get in the hose,and then you connected it to the recovery tank....once you started the recovery process you added non condensible air into your recovery tank. correct me if i'm wrong. love your video by the way.
Love your videos, helps guys like me who are thrown in as a green horn with nobody to fall back on. I work at a place with several worn out RTU's and have to hope I'm not hurting them worse. I had a years worth of HVAC night classes, but you can't learn everything. They didn't have much of practicallity Module. If it weren't for vids and websites I most likely would have thrown myself of the roof.
@Wallabydam Recovery tanks have two access ports. One is for vapor and one is for liquid. There's no need to turn the tank upside down. Virgin tanks require you to turn the tank up side down for liquid.
@DrZarkloff Sorry what i mean is when charging a system not the recovery tank, does it matter if its gas going in, how do you know which is high and which is low side, i always forget because its about every 8 years that i ever need to top off a very very Very slow leak,
I am having problems with my recovery machine gauges. The one on the right is at 350 and it is not wanting to go down. I feel I am doing something wrong in which it doesnt want to go down or purge the pressure inside. I used it oce yesterday for the first time ad now the pressure does not want to go down. Another question is what do you have to do when you go from r-22 to r-410?
@aschaberg12 The gauges on the recovery machine are secondary to the gauges on the system. You might be able to get a new gauge from the manufacturer. You need to flush the line set with a flush that insures the removal of all of the old mineral oil from the tubing.
at the start after u purged the yellow line going to the botttle and then conected it to the bottle wouldnt there have been air in that line as it was opened to atmosphere then u just opened the bottle letting that air in.
at the start after u purged the yellow line going to the botttle and then conected it to the bottle wouldnt there have been air in that line as it was opened to atmosphere then u just opened the bottle letting that air in.
hola Dr..los video estan muy buenos...keep up the good work...Im going for hvac starting this fall....como cuanto cuesta unas ..charging hoses..excuse my spanglish...lol
your videos are good dr z i just want to ask you what kind of psi the low pressure gage and high pressure gage should show in the normal operating working conditions or do we have to check it some where .. can you give me an idea where to find this info thanks again for your help
There is no issue to change the gauge manifold when we recover R-404A because when we charge R-404A so we have to be conscious to charge it liquid form is it correct? And due to mentioned condition is we have to worry about when we recover R-404A?
I have got to ask you that can we recover the Ref. R-404A as same procedure as we recover R-22 and also explain how does recovered gas R-404A in detail.
Whats going on with the end of this video? I thought you were charging this unit with 10lbs? From what I'm seeing your scale is at about 15lbs and the video stops... Could you elaborate please.
B.T.W. thanks for taking the time to post these vids! I'm in basic refrigeration at Wyotech/Fremont and I'm getting much info from your videos when I add them along with the curriculum at Wyotech...Much thanks!
@Prudentone1 You should charge an empty system with liquid through the high side to give it a static charge. Then, finish the charge with vapor through the low side.
@DrZarkloff Are you sure of that answer you gave @Prudentone1 ?? I believe I have learned that you should charge an empty system with vapor first because if you start with liquid it will evaporate and freeze up while entering an under presurized zone., and to recover the refrigerant you should start with liquid to get it faster and then end up with vapor. I'm not a technician I only took an HVAC program.
@DrZarkloff can you also charge a 15 ton commercial semi hermatic compressor through liquid line. or just residential units. p.s im from the bahamas and your videos are a big help (thanks)
@DrZarkloff can you also charge a 15 ton commercial semi hermatic compressor through liquid line. or just residential units. p.s im from the bahamas and your videos are a big help (thanks)
@Prudentone1 you never wanna dump liquid into the low side. That would put liquid directly into the compressor. causing flooded start, and sometimes even breaking crank shafts when starting. You usually charge liquid through the highside of the system because it is being dumped into the condenser coil. After getting as much refrigerant into the unit that way you can open your low side and flash the rest though your gauges. (meter it)
thanks dr z keep on doing videos about troubleshooting electrical stuff i would like to see more about chiillers type with compressor may be you already have videos about it
hi dr z i have a cuestion hope you can answer it to me you have a lot of coments but i haven't see if you open both gauges when you vacuum the system hope you can answer this one for me thanks good videos have a great new year 2011
when you charge the system through liquid your compressor must be off right?....if you are charging by vapor in the suction line then you need the compressor on right? but it will take a little longer
SO WE USE RECOVERY FOR WHAT?? FOR TAKE THE GAS TO THE TANK? OR DRAG THE GAS TO THE UNIT? BECAUSE VACUUMN ITS THE SAME.. OR IN VACUUMN IT JUST TAKE THE GAS IN THE VACUUMN MACHINE????
@tezoloco Recovery is to drain the refrigerent completly out of the system in the event u have a leak or need to replace the condensor etc. It takes the refrigerant to the B tank. However it isnt the same as a vaccum. A vaccum is to pull a suction on the system to leak detect ur fresh welds etc. Basically to see if ur system is sealed.
due to the 500 char limit i have to post multiple part comments
the hoses are made for r134a and i was wondering if any refrigerant hose can be used or if it has o be specially designed for the refrigerants and specially designed to resist the pressures.
despite that it sais on the hoses max working pressure of 600 psi and burst of 3000.
the hoses are the high pressure red and the tank yellow for a gage set.
if it requires a special hose then what would i need to look for
what I meant to say was do you think it is possible to get a job with a diploma from an online school. I don't have time to go to a traditional school.
Thanks Dr z... this video is very helpfull. but i was wondering, once you have purged your hoses and have your recovery unit going would you have to leave the low side on the manifold guage open so that the refigerant would be to flow properly out of the system?
why wouldn't you charge by Super heat or Sub cool for a package unit? I never heard that.. though im still a student. with 2 years exp. I was also shown when charging that I open both Low and High side when dumping liquid into the system with unit off.. then close off manifold and flip to the tank to vapor and open lowside with unit running.. to top it off. is this no correct? I have been shown that for years..
and when dehydrating, it doesnt matterr how low of microns you go, the lower the better you would like to achive 500 microns but remember after each recovery recharge system with nitrogen because that will draw out moisture, then recover again. 3 times this should be done
How do you purge your hoses when taking them off, so as to not get sprayed? I'm assuming I could just front seat the discharge service valve? open the valves on my gauges and let it flow through to the suction..I know using low loss will help along with ball valve extensions. I remember us doing it in class but I totally forgot. Also some of these manifolds can have almost a pound of refrigerant still in them, like the zepplin for example.
@orbtaybal I use low loss fittings. I disconnect the high pressure hose first then cross over the refrigerant in the high pressure hose to the suction side. It helps to reduce refrigerant loss.
got a question...how come when you got down to 500 microns ..well in this case 130..arent you suppose to turn the vaccum pump off and wait five minutes and make sure that 500 microns holds there so you know there isnt any leaks in the system before charging?
im agreed with you doc 10pounds but somethings its not accurate because of the side of the line sets may be longer and need more rerigerant. so subcooling or superheat is always good to check.
Thats how I attached it too, but on my yellow jacket recovery it shows having the yellow service hose going to the liquid service port. Then the blue one goes to the suction port of the recovery machine via a reciever dryer. Then the discharge of the recovery machine goes to the recovery tank and for some reason the red hose goes to the tank as well. The Red valve is closed the blue valve is open. Its called a push pull or something. Very confusing so I just do it the way you show on the video.
hey doc z!! awesome videos....question for ya ....i see you add freon to this system from the high side ...liquid...do you recommend this practice whenever you charge a system??
@viperspeed172019 Thanks for watching. You can add the initial charge to the system by the liquid side. Then you have to fine tune the charge by vapor in the suction side.
@DrZarkloff in a split system how much initial liquid r-22 to add before switching to vapor. I am working on a newly put together system without any refrigerant and wondering which way to go. As always your videos are great.
Hi Dr z. I have a question. I have a soda machine that isn't working properly. If I leave the unit plug overnight the soda can inside will froze so I have to unplug everytime I leave for the day. I ohm out the temperature control and is good. I am taking HVAC courses right now. So what can causes this to happen?
@DrZarkloff Thanks for responding back. What is a tonnage? I haven't learn that in class yet. So does that mean I need a recovery charge unit to get the job done? What equipments do I need?
@Khmerica26 Tonnage is a measurement referring to BTU. There are 12,000 BTU per ton. See my HVAC Safety video to see what kind of equipment you need to do the job.
Dr Zarkloff. I like the videos. The guy who trained me was 70 years old and he taught me a trick that I have used in my 20 year career. If you can charge a system as you did here with the cylinder below the compressor and after bleeding you hose to the manifold. You can just open the high side and go take a break. I have done this for years and when I come back and run the system everything is so darn close I don't mess with it.
@ariotto1 Its really simple. Cylinder upside down and at a lower level that the compressor. Bleed liquid refrigerent up to your gages. Then open the high side all the way and walk away. I get a smoke. Come back close off the valve and fire up the unit. Only a few time in 20 years have had to top off with vapor. Bur that was easy because my cylinder line was full of liquid. Thid will work on any HVAC system.
Hey doc. I live in Los Angeles CA and I'm intrested in HVAC I'm currently inrolled in Hvac classes for my california certification... My question is, is now a good time to join the trade??? I'm 22 years old.
Dr Zarkloff i watch all your videos all the time! I do HVAC myself and i think u screwed up a lil at your last purge connection before the cylinder on the discharge side of your recovery unit . shouldnt the hose have been attatched to the cylinder where from there u couldve bled the air from that hose before opening up your tank? you had the last yellow hose in your hand and then hooked it up to the cylinder and opened the valve. did you pull a vacuum on that tank? Good stuff though!!
Does the system needs running while giving the initial static charge on the hi side? Also, how much initial charge to give a system before finishing up the charge on the low side?
Do the system needs running while giving the initial static charge on the hi side? Also, how much initial charge to give a system before finishing up the charge on the low side?
@vabeach1989 The system need to be off when you put in the liquid static charge. Then you turn on the system to finish the charge with vapor the the low side.
@DrZarkloff can you please tell us approximately how much percent you need to fill from the high side and then from the low side after switching on the system?
i guess valuecreation 75 is telling me my friends are correct about not topping off 410a, go to MAINSTREAM ENGINEERING CORPORATION who gives out certification tests ,and they say its perfectly ok to top off 410a ,,how confusing is this :-))) thanks for your response and anytime you want dr zarchloff jump right in please ,,,
What you mean at 3:23, where did you get the 160oz and the 16 that you divided it by?
SombraLocs 2 weeks ago
@SombraLocs The unit required 160 ounces of R-22. There are 16 ounces per pound. 16 into 160 is 10. Therefore, I added 10 pounds.
DrZarkloff 2 weeks ago
DrZ HEy Again. hey i found out im getting no power at the outdoor box for the condenser... before and obviously after the breaker. where does this power line go to straight to the main breaker panel? or inside the furnace? any help woudl be appreciated
Drew927 3 weeks ago
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Dr Z
Im trying to charge a heat pump in the winter with r22. Its about 40 degrees outside. Ive gotten about half the amount of r22 needed into the system, but the defrost is kicking on now and shutting off the compressor. Can you give me some advise please. Im still green behind the ears!
whereisthemessiah 1 month ago
I don't agree with the initial purging technique's.
dwarfcar76 1 month ago
@dwarfcar76 Neither do I.
prkr314 2 weeks ago
so just charge all package units to required amount of refrigerant dont go by sub cool and superheat
mayhew23451 2 months ago
@mayhew23451 Exactly. You wouldn't believe how hard it is to convince new techs of this.
DrZarkloff 2 months ago
@DrZarkloff why not with super heat you could over or under charge, depending on the line sets length
snollic 1 month ago
@DrZarkloff /subcool
snollic 1 month ago
I'm learning refrigeration repair for the company I work for. We refurbish used Soft serve ice cream machines. We rebuild water cooled and air cooled units. When pressure is highor low in the water cooled unit we adjust the water valve to achieve pressure but in the air cooled units I'm unsure of what to do to get the right pressure. I don't know how to adjust it if its even possible. Blower works fine and condenser is clean
dendog21 4 months ago
@dendog21 It's important to have the correct amount of charge in the system to be sure that the subcooling off the condensing coil is at the manufactures specs.
DrZarkloff 4 months ago
ok so im currently getting a HVAC certificate at a tech school and im trying to decide if i should get an Industrial Electrical Maintenance Technical certificate after i get the HVAC one...would i get a better/ higher paying job if i have both certificates or would it not really make a difference?
5NOOPY615 5 months ago
@5NOOPY615 Initially it will not make a difference. Most companies are going to assume that you know "Just enough to be dangerous", thats why they want 2-5 years of field experience.
dwarfcar76 1 month ago
You have much equipment, but little technique, you should not purge the hose, spewing coolant is more technical to make vacuum hose to the pump
2jjrq 5 months ago
why does the scale count backwards when you are charging semi hermetic cop
dianemarie909 6 months ago
@dianemarie909 The scale could count backwards if you don't press the tare button before charging.
DrZarkloff 6 months ago
@DrZarkloff thank you
dianemarie909 6 months ago
@DrZarkloff the tank is giving its refrigerant from to the unit so its getting lighter
liviubandas1 5 months ago
@dianemarie909 scale counts backwards because its a scale and you are removing weight from it as you charge your system. What happens when you remove weight from a scale? The number goes down right? And if you start at zero then it wil go into the negative.
dendog21 4 months ago
@dianemarie909 The scale will more than likely always read negative since the tank is being weighed backwards. Its being weighed by weight loss, not weight gain.
dwarfcar76 1 month ago
It would be nice to work only on wallmount units, in a school, im getting tired of this heat in houston 115 degrees on the roof yestarday.
Rozco99 6 months ago
@Rozco99 I wish that all I had to do was to work on wall hung units, too. That way I wouldn't even have to wake up in the morning to work.
DrZarkloff 6 months ago
If you hook up all your hoses first, including the one to the jug of R22 you won't have to purge
mrstenify 6 months ago
@mrstenify purgeing to allow some open air to release pressure yes you have to purge the line when recoverying and vacuum and charge.
MrGeorgeda123 4 months ago
Why would you be purging your hoses when all your doing is recovering the refrigerant???
mrstenify 6 months ago
@mrstenify You need to purge the hoses to prevent moisture from getting in the refrigerant in case you plan on reusing it.
DrZarkloff 6 months ago
@DrZarkloff Good point but I've always used new stuff cause you never know whats gone on in a system
mrstenify 6 months ago
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@DrZarkloff
It has a lot of equipment, but little technique, you should not purge the hose, spewing coolant is more technical to make vacuum hose to the pump
2jjrq 5 months ago
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Hi, DrZarkloff. How do I know when the recovery process is complete and it is time to disconnect the recovery unit from the system?
Love your vidoes, watch every day. Thanks.
ylor123 6 months ago
you sound EXACTLY like Jeff Daniels from dumb and dumber! thats awesome
bluedawg1190 6 months ago
@bluedawg1190 Cool. Thanks.
DrZarkloff 6 months ago
Comment removed
ylor123 6 months ago
What did you hook up you vacuum pump to? and do you always have to reach 500 microns?
SombraLocs 6 months ago
@SombraLocs I connected the vacuum pump to the gauges which were connected to the unit. You need to evacuate the system to 500 microns or less each time.
DrZarkloff 6 months ago
@DrZarkloff Is that after you recover the refrigerant?
SombraLocs 6 months ago
@SombraLocs yes.
DrZarkloff 6 months ago
thanks for making ur videos.. i love them.. i jus wanted 2 know which hose did u attach 2 the system? the back or the front.? and the yellow hose is jus 4 vacuum right?
soapfanatic 7 months ago
@soapfanatic I connected the red and blue hoses to the system. The yellow hose that's connected to the gauges is connected to the recovery unit inlet. Then a separate hose is connected to the outlet side of the recovery unit and to the recovery tank.
DrZarkloff 7 months ago
there needs to be a line dryer before your reclaim... i do it out of respect of my reclaim machine...am i wrong?
natronwarrior 7 months ago
@natronwarrior It can be a good idea to use a drier at the inlet of the recovery unit. I'm sorry for not having one.
DrZarkloff 7 months ago
hi DR ZARkloff good job. i check you videos. today and i am working in a comercial unit is dead is # DH120N20A2AAA3A PKT predator the control board is dead. i replace the 24v trsf but not work. have the 208v 230v in no 24v output. le me know. thanks.
avito54 7 months ago
@avito54 Check the transformer to see if it has a small breaker built in to it. It could be tripped. If that isn't it then see it there's a fuse somewhere inline or even on the board.
DrZarkloff 7 months ago
You purged the yellow hose before hooking it up to the recovery tank. As soon as you closed you manifold you allowed air to get in the hose,and then you connected it to the recovery tank....once you started the recovery process you added non condensible air into your recovery tank. correct me if i'm wrong. love your video by the way.
painternick29 7 months ago
@painternick29 Actually, I bleed the hoses. Also, the recovery unit is self purging.
DrZarkloff 7 months ago
Its so good to see it in real life instead of pictures in a book. Thanks Dr. Z
workingthrash 7 months ago
@workingthrash Thanks for watching.
DrZarkloff 7 months ago
?
shouldnt there be a dryer somewhere in the line>>
?????
salcedojorge 7 months ago
@salcedojorge There is a drier in the liquid line. Package units don't have a line set.
DrZarkloff 7 months ago
Love your videos, helps guys like me who are thrown in as a green horn with nobody to fall back on. I work at a place with several worn out RTU's and have to hope I'm not hurting them worse. I had a years worth of HVAC night classes, but you can't learn everything. They didn't have much of practicallity Module. If it weren't for vids and websites I most likely would have thrown myself of the roof.
150grnballistictip 8 months ago
@150grnballistictip Thanks for watching. Keep on keepin' on.
DrZarkloff 8 months ago
when you charge or add gas, do you do that with tanke right side up or nozzle side down for liquid??
Wallabydam 8 months ago
@Wallabydam Recovery tanks have two access ports. One is for vapor and one is for liquid. There's no need to turn the tank upside down. Virgin tanks require you to turn the tank up side down for liquid.
DrZarkloff 8 months ago
@DrZarkloff Sorry what i mean is when charging a system not the recovery tank, does it matter if its gas going in, how do you know which is high and which is low side, i always forget because its about every 8 years that i ever need to top off a very very Very slow leak,
Wallabydam 8 months ago
@Wallabydam The small line is the high side and the larger line is the suction side. It's best to charge by the suction side.
DrZarkloff 8 months ago
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Is this process the same when recovering and charging R-410A? If not can you tell me the differences?
leonel99362 8 months ago
Is this process the same when recovering and charging R-410A? If not can you tell me the differences?
leonel99362 8 months ago
why do you use r410a gauge with r22 refrigerant?
profeair 8 months ago
@profeair Sorry. My R22 gauges were broken that day.
DrZarkloff 8 months ago
I like your micron gauge! I have been looking for one like that. Has it been dependable for you over time? Thanks!
d1g1man 8 months ago
@d1g1man I like my CPS micron gauge. It's held up great.
DrZarkloff 8 months ago
I am having problems with my recovery machine gauges. The one on the right is at 350 and it is not wanting to go down. I feel I am doing something wrong in which it doesnt want to go down or purge the pressure inside. I used it oce yesterday for the first time ad now the pressure does not want to go down. Another question is what do you have to do when you go from r-22 to r-410?
aschaberg12 8 months ago
@aschaberg12 The gauges on the recovery machine are secondary to the gauges on the system. You might be able to get a new gauge from the manufacturer. You need to flush the line set with a flush that insures the removal of all of the old mineral oil from the tubing.
DrZarkloff 8 months ago
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at the start after u purged the yellow line going to the botttle and then conected it to the bottle wouldnt there have been air in that line as it was opened to atmosphere then u just opened the bottle letting that air in.
rybang1 9 months ago
@rybang1 I purged out the yellow hose.
DrZarkloff 9 months ago
at the start after u purged the yellow line going to the botttle and then conected it to the bottle wouldnt there have been air in that line as it was opened to atmosphere then u just opened the bottle letting that air in.
rybang1 9 months ago
yes good videos,do you know how much a set of digital gauges might cost
king4ojay 10 months ago
hola Dr..los video estan muy buenos...keep up the good work...Im going for hvac starting this fall....como cuanto cuesta unas ..charging hoses..excuse my spanglish...lol
zamorahvac 10 months ago
@zamorahvac Thanks for watching. An inexpensive set of manifold gauges are about $40.
DrZarkloff 10 months ago
if i only have 3 hoses and am going to do a recovery which line do i only leave on the blue hose with the suction line?
SuperAcordionHero 11 months ago
@SuperAcordionHero Yes. On split systems with solenoid valves in the air handler you'll need to remove the coil and use a magnet.
DrZarkloff 10 months ago
your videos are good dr z i just want to ask you what kind of psi the low pressure gage and high pressure gage should show in the normal operating working conditions or do we have to check it some where .. can you give me an idea where to find this info thanks again for your help
theASEtech 1 year ago
@theASEtech It all depends on the type of refrigerant you have in the system.
DrZarkloff 1 year ago
@theASEtech ummmm its called a subcooling or superheat calculator,in most cases there is a subcooling chart on the outdoor unit door
somethingsseemobviou 9 months ago
Where is your scale for the recovery jug....lol
23DUNIT23 1 year ago
Sir,
There is no issue to change the gauge manifold when we recover R-404A because when we charge R-404A so we have to be conscious to charge it liquid form is it correct? And due to mentioned condition is we have to worry about when we recover R-404A?
Regards
M. Ismail
2170509 1 year ago
@2170509 Yes, R-404a must be charged in as a liquid.
DrZarkloff 1 year ago
@2170509 so can we recover R-404 with same procedure as we recover R-22?
Regards
M. Ismail
2170509 1 year ago
Sir,
I have got to ask you that can we recover the Ref. R-404A as same procedure as we recover R-22 and also explain how does recovered gas R-404A in detail.
Regards
M. Ismail
2170509 1 year ago
@2170509 yes.
DrZarkloff 1 year ago
Dr. Z
Whats going on with the end of this video? I thought you were charging this unit with 10lbs? From what I'm seeing your scale is at about 15lbs and the video stops... Could you elaborate please.
B.T.W. thanks for taking the time to post these vids! I'm in basic refrigeration at Wyotech/Fremont and I'm getting much info from your videos when I add them along with the curriculum at Wyotech...Much thanks!
Michaelfromfremont 1 year ago
@Michaelfromfremont You're looking at the ounces indicator. The top number displays how many pounds have gone in.
ki4hou 1 year ago
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why is it some people said you can only charge it thru low side, while others said charge thru high side? I am confuse...
Prudentone1 1 year ago
why is it some people said you can only charge it thru low side, while others said charge thru high side? I am confuse..............
Prudentone1 1 year ago
@Prudentone1 You should charge an empty system with liquid through the high side to give it a static charge. Then, finish the charge with vapor through the low side.
DrZarkloff 1 year ago
@DrZarkloff Are you sure of that answer you gave @Prudentone1 ?? I believe I have learned that you should charge an empty system with vapor first because if you start with liquid it will evaporate and freeze up while entering an under presurized zone., and to recover the refrigerant you should start with liquid to get it faster and then end up with vapor. I'm not a technician I only took an HVAC program.
nandiito 1 year ago
@DrZarkloff can you also charge a 15 ton commercial semi hermatic compressor through liquid line. or just residential units. p.s im from the bahamas and your videos are a big help (thanks)
cuttersky1 1 year ago
@cuttersky1 Yes, you can weigh in the initial static charge with liquid.
DrZarkloff 1 year ago
This has been flagged as spam show
@DrZarkloff can you also charge a 15 ton commercial semi hermatic compressor through liquid line. or just residential units. p.s im from the bahamas and your videos are a big help (thanks)
cuttersky1 1 year ago
@Prudentone1 you never wanna dump liquid into the low side. That would put liquid directly into the compressor. causing flooded start, and sometimes even breaking crank shafts when starting. You usually charge liquid through the highside of the system because it is being dumped into the condenser coil. After getting as much refrigerant into the unit that way you can open your low side and flash the rest though your gauges. (meter it)
wargasmn 1 year ago
After you drop that micron gauge to 500 turn off the vacuum and let it set for 10 min to see it holds right? Id hope so anyways
wargasmn 1 year ago
@wargasmn Yes.
DrZarkloff 1 year ago
thanks dr z keep on doing videos about troubleshooting electrical stuff i would like to see more about chiillers type with compressor may be you already have videos about it
theASEtech 1 year ago
@theASEtech I do have a chiller tour video.
DrZarkloff 1 year ago
hi dr z i have a cuestion hope you can answer it to me you have a lot of coments but i haven't see if you open both gauges when you vacuum the system hope you can answer this one for me thanks good videos have a great new year 2011
theASEtech 1 year ago
@theASEtech Yes, you open both the low and high side of the gauges when vacuuming a system.
DrZarkloff 1 year ago
OH! Those knees! What do you take to keep the knees from locking up? I just had arthroscopic surgery and may never kneel right again...
pylgrym 1 year ago
@pylgrym I need a little knee surgery, too. I just ignore the pain.
DrZarkloff 1 year ago
great vid jim,
go gators
Ken G
ken6675 1 year ago
@ken6675 I wore my Gator hoodie today. lol
DrZarkloff 1 year ago
when you charge the system through liquid your compressor must be off right?....if you are charging by vapor in the suction line then you need the compressor on right? but it will take a little longer
catrachomg 1 year ago
@catrachomg Yes
DrZarkloff 1 year ago
SO WE USE RECOVERY FOR WHAT?? FOR TAKE THE GAS TO THE TANK? OR DRAG THE GAS TO THE UNIT? BECAUSE VACUUMN ITS THE SAME.. OR IN VACUUMN IT JUST TAKE THE GAS IN THE VACUUMN MACHINE????
tezoloco 1 year ago
@tezoloco Recovery is to drain the refrigerent completly out of the system in the event u have a leak or need to replace the condensor etc. It takes the refrigerant to the B tank. However it isnt the same as a vaccum. A vaccum is to pull a suction on the system to leak detect ur fresh welds etc. Basically to see if ur system is sealed.
Tortz69 1 year ago
due to the 500 char limit i have to post multiple part comments
the hoses are made for r134a and i was wondering if any refrigerant hose can be used or if it has o be specially designed for the refrigerants and specially designed to resist the pressures.
despite that it sais on the hoses max working pressure of 600 psi and burst of 3000.
the hoses are the high pressure red and the tank yellow for a gage set.
if it requires a special hose then what would i need to look for
end of part 2
ejonesss 1 year ago
@ejonesss That's amazing. I've never had a hose burst on me. I don't know of any difference in burst rating. Maybe it's a quality thing.
DrZarkloff 1 year ago
due to the 500 char limit i have to post multiple part comments
i was wondering is there any differences between the hoses used to connect the recovery machine to the recovery tank and the charge hoses?
because i have seen 2 hoses blow the outer casing.
for some reason the charge r22 a few atoms are making it's way through the rubber core of the hose and causing a bubble that pops.
end of part 1
ejonesss 1 year ago
Thank you for answering my questions.
garyp2122 1 year ago
what I meant to say was do you think it is possible to get a job with a diploma from an online school. I don't have time to go to a traditional school.
garyp2122 1 year ago
@garyp2122 I guess that it's possible. It just depends on what the employer is looking for.
DrZarkloff 1 year ago
excuse the last coment ... i just saw the video again and you just answered my question.
etinkake1 1 year ago
Thanks Dr z... this video is very helpfull. but i was wondering, once you have purged your hoses and have your recovery unit going would you have to leave the low side on the manifold guage open so that the refigerant would be to flow properly out of the system?
etinkake1 1 year ago
Do you think it is possible to learn this trade threw online/home schooling? I went online and there is a school that says it is possible.
garyp2122 1 year ago
@garyp2122 You can learn a lot of the classroom information online. There's no replacement for hands on training.
DrZarkloff 1 year ago
I know that liquid in the comp can damage the comp but I have never had an issue with doing it that way any input?
uchemp 1 year ago
@uchemp You can charge a system on with liquid on the suction side. You just have to feed it very slowly.
DrZarkloff 1 year ago
why wouldn't you charge by Super heat or Sub cool for a package unit? I never heard that.. though im still a student. with 2 years exp. I was also shown when charging that I open both Low and High side when dumping liquid into the system with unit off.. then close off manifold and flip to the tank to vapor and open lowside with unit running.. to top it off. is this no correct? I have been shown that for years..
uchemp 1 year ago
@uchemp Packaged units have a critical weigh in charge. You charge split systems by super heat or subcooling.
DrZarkloff 1 year ago
How much time are you aloud to do a job? Do you have appointments?
garyp2122 1 year ago
@garyp2122 I work for the school board. I'm allowed to take as much time as I need to do the job properly.
DrZarkloff 1 year ago
and when dehydrating, it doesnt matterr how low of microns you go, the lower the better you would like to achive 500 microns but remember after each recovery recharge system with nitrogen because that will draw out moisture, then recover again. 3 times this should be done
therealhaas1 1 year ago
that is not a dot-49 approved recovery tank.. gray bottom yellow top
therealhaas1 1 year ago
Shouldnt you purge the hoses using the refrigerant drum to avoid refrigerant loss from the system?
TheStarJuggler 1 year ago
@TheStarJuggler I like to purge both directions to keep the moisture out.
DrZarkloff 1 year ago
How do you purge your hoses when taking them off, so as to not get sprayed? I'm assuming I could just front seat the discharge service valve? open the valves on my gauges and let it flow through to the suction..I know using low loss will help along with ball valve extensions. I remember us doing it in class but I totally forgot. Also some of these manifolds can have almost a pound of refrigerant still in them, like the zepplin for example.
orbtaybal 1 year ago
@orbtaybal I use low loss fittings. I disconnect the high pressure hose first then cross over the refrigerant in the high pressure hose to the suction side. It helps to reduce refrigerant loss.
DrZarkloff 1 year ago
I heard that low microns you will start pumping out oil.
orbtaybal 1 year ago
@orbtaybal If you have oil close to where you connect the hoses you could get oil.
DrZarkloff 1 year ago
got a question...how come when you got down to 500 microns ..well in this case 130..arent you suppose to turn the vaccum pump off and wait five minutes and make sure that 500 microns holds there so you know there isnt any leaks in the system before charging?
crownvvc4 1 year ago
@crownvvc4 Yes, I do a lot off camera.
DrZarkloff 1 year ago
I don't bother to recover it, just dump it to the enviroment
vancouversignman 1 year ago
@vancouversignman
Not only are you and idiot in that you are killing our ozone, but recovery is necessary as a financial reason so you don't have to buy more.
orbtaybal 1 year ago
im agreed with you doc 10pounds but somethings its not accurate because of the side of the line sets may be longer and need more rerigerant. so subcooling or superheat is always good to check.
laloludena 1 year ago
Hi can you use a empty R22 can to recover also?
thanks
texsales01 1 year ago
@texsales01 No. Virgin bottles have check valves on them that prevent you from refilling them.
DrZarkloff 1 year ago
Hi can you use a empty R22 tank to recover 22 also?
texsales01 1 year ago
@texsales01 no no no no no
artistjja 1 year ago
Thats how I attached it too, but on my yellow jacket recovery it shows having the yellow service hose going to the liquid service port. Then the blue one goes to the suction port of the recovery machine via a reciever dryer. Then the discharge of the recovery machine goes to the recovery tank and for some reason the red hose goes to the tank as well. The Red valve is closed the blue valve is open. Its called a push pull or something. Very confusing so I just do it the way you show on the video.
tangnatalaga 1 year ago
hey doc z!! awesome videos....question for ya ....i see you add freon to this system from the high side ...liquid...do you recommend this practice whenever you charge a system??
thanx....your vids are killer!!!!!
viperspeed172019 1 year ago
@viperspeed172019 Thanks for watching. You can add the initial charge to the system by the liquid side. Then you have to fine tune the charge by vapor in the suction side.
DrZarkloff 1 year ago
@DrZarkloff in a split system how much initial liquid r-22 to add before switching to vapor. I am working on a newly put together system without any refrigerant and wondering which way to go. As always your videos are great.
vabeach1989 1 year ago 2
@vabeach1989 You might want to add two pounds of liquid refrigerant per ton as a static charge before switching to vapor.
DrZarkloff 1 year ago
Hi Dr z. I have a question. I have a soda machine that isn't working properly. If I leave the unit plug overnight the soda can inside will froze so I have to unplug everytime I leave for the day. I ohm out the temperature control and is good. I am taking HVAC courses right now. So what can causes this to happen?
Thank you
Khmerica26 1 year ago
@Khmerica26 I'd replace the temperature control for a digital control. They're easier to keep the temperature where you want it.
DrZarkloff 1 year ago
@Khmerica26 Take the tonnage and multiply it by 2. Then charge that amount with liquid for your static charge.
DrZarkloff 1 year ago
@DrZarkloff Thanks for responding back. What is a tonnage? I haven't learn that in class yet. So does that mean I need a recovery charge unit to get the job done? What equipments do I need?
Khmerica26 1 year ago
@Khmerica26 Tonnage is a measurement referring to BTU. There are 12,000 BTU per ton. See my HVAC Safety video to see what kind of equipment you need to do the job.
DrZarkloff 1 year ago
Dr Zarkloff. I like the videos. The guy who trained me was 70 years old and he taught me a trick that I have used in my 20 year career. If you can charge a system as you did here with the cylinder below the compressor and after bleeding you hose to the manifold. You can just open the high side and go take a break. I have done this for years and when I come back and run the system everything is so darn close I don't mess with it.
petesque 1 year ago
@petesque Cool. I know what you mean. I just like to make sure that I don't over or under charge on package systems.
DrZarkloff 1 year ago
@petesque can u explain that trick better? i really would like to try that!
ariotto1 1 year ago
@ariotto1 Its really simple. Cylinder upside down and at a lower level that the compressor. Bleed liquid refrigerent up to your gages. Then open the high side all the way and walk away. I get a smoke. Come back close off the valve and fire up the unit. Only a few time in 20 years have had to top off with vapor. Bur that was easy because my cylinder line was full of liquid. Thid will work on any HVAC system.
petesque 1 year ago
Hey doc. I live in Los Angeles CA and I'm intrested in HVAC I'm currently inrolled in Hvac classes for my california certification... My question is, is now a good time to join the trade??? I'm 22 years old.
kingstonblackboy 1 year ago
@kingstonblackboy I wish that I had started my HVAC career when I was 22.
DrZarkloff 1 year ago
Dr Zarkloff i watch all your videos all the time! I do HVAC myself and i think u screwed up a lil at your last purge connection before the cylinder on the discharge side of your recovery unit . shouldnt the hose have been attatched to the cylinder where from there u couldve bled the air from that hose before opening up your tank? you had the last yellow hose in your hand and then hooked it up to the cylinder and opened the valve. did you pull a vacuum on that tank? Good stuff though!!
jonjon2121nyc 1 year ago
@jonjon2121nyc Good eye. I probably did all that off camera. Some things sometimes slip by when filming.
DrZarkloff 1 year ago
Does the system needs running while giving the initial static charge on the hi side? Also, how much initial charge to give a system before finishing up the charge on the low side?
vabeach1989 1 year ago
Do the system needs running while giving the initial static charge on the hi side? Also, how much initial charge to give a system before finishing up the charge on the low side?
vabeach1989 1 year ago
@vabeach1989 The system need to be off when you put in the liquid static charge. Then you turn on the system to finish the charge with vapor the the low side.
DrZarkloff 1 year ago
so does it matter if you charge form the high or low side?
Wallabydam 1 year ago
@Wallabydam You need to charge the initial static charge by liquid in the high side and finish up the charge in the low side.
DrZarkloff 1 year ago
@DrZarkloff can you please tell us approximately how much percent you need to fill from the high side and then from the low side after switching on the system?
hamdad17 1 year ago
great vacuum, why did you pull the existing refridgerant out, was there a leak? if so could you tell if there were any noncondensables in it?
redhot916spd 1 year ago
@redhot916spd I was replacing the compressor.
DrZarkloff 1 year ago
Did you know how many ounces it holds by checking the data plate?
BiggDoggSoCal 1 year ago
@BiggDoggSoCal Yes.
DrZarkloff 1 year ago
to check freon levels i just hook my low/high pressure hoses up and see if it holds pressure, is that right?
MrDripdrop 1 year ago
@MrDripdrop That might tell you if the system is flat or not. You really need to have the system running and check the subcooling or superheat.
DrZarkloff 1 year ago
Comment removed
rafaellarios 1 year ago
so, how much refrigerant did you recover at the beginning?
ngn13s1s150 1 year ago
i guess valuecreation 75 is telling me my friends are correct about not topping off 410a, go to MAINSTREAM ENGINEERING CORPORATION who gives out certification tests ,and they say its perfectly ok to top off 410a ,,how confusing is this :-))) thanks for your response and anytime you want dr zarchloff jump right in please ,,,
garcon98 2 years ago
and drzarkloff i was not confusing the gauges you where using in your video , in case you thought i was thank you ,,it is a question about 410 a
garcon98